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EP0802054B1 - Method and apparatus for printing individual self-supporting objects - Google Patents

Method and apparatus for printing individual self-supporting objects Download PDF

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Publication number
EP0802054B1
EP0802054B1 EP97103616A EP97103616A EP0802054B1 EP 0802054 B1 EP0802054 B1 EP 0802054B1 EP 97103616 A EP97103616 A EP 97103616A EP 97103616 A EP97103616 A EP 97103616A EP 0802054 B1 EP0802054 B1 EP 0802054B1
Authority
EP
European Patent Office
Prior art keywords
printing
article
print image
individual print
individual
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97103616A
Other languages
German (de)
French (fr)
Other versions
EP0802054A2 (en
EP0802054A3 (en
Inventor
Hans-Dieter Niestrath
Norbert Rohwetter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Werner Kammann Maschinenfabrik GmbH and Co KG
Original Assignee
Werner Kammann Maschinenfabrik GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Werner Kammann Maschinenfabrik GmbH and Co KG filed Critical Werner Kammann Maschinenfabrik GmbH and Co KG
Publication of EP0802054A2 publication Critical patent/EP0802054A2/en
Publication of EP0802054A3 publication Critical patent/EP0802054A3/en
Application granted granted Critical
Publication of EP0802054B1 publication Critical patent/EP0802054B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F33/00Indicating, counting, warning, control or safety devices
    • B41F33/0036Devices for scanning or checking the printed matter for quality control
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F15/00Screen printers
    • B41F15/08Machines
    • B41F15/0863Machines with a plurality of flat screens mounted on a turntable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F15/00Screen printers
    • B41F15/08Machines
    • B41F15/10Machines for multicolour printing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41PINDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2215/00Screen printing machines
    • B41P2215/10Screen printing machines characterised by their constructional features
    • B41P2215/11Registering devices
    • B41P2215/112Registering devices with means for displacing the frame
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41PINDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2215/00Screen printing machines
    • B41P2215/50Screen printing machines for particular purposes
    • B41P2215/55Screen printing machines for particular purposes for printing compact discs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41PINDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2217/00Printing machines of special types or for particular purposes
    • B41P2217/50Printing presses for particular purposes
    • B41P2217/55Printing presses for particular purposes for printing compact discs

Definitions

  • the invention relates to a method and an apparatus for Printing of self-supporting single objects, in particular such objects, the extent of which is perpendicular to the at least one an area to be printed generally relative is small. It can be z.
  • the changeover requires the setting of the printing units on the print image of each the following lots, which are very well trained in today's machines Operating personnel if a printed image with good Quality should be made. The requirements the quality of the printed image is getting bigger.
  • EP 0488092 B1 describes a screen printing machine for printing on web-like material is known, in which on the web-shaped Material attached registration marks monitored by a camera become.
  • the screen printing stencils are adjustable and also equipped with servomotors that have a Calculator depending on those detected by the camera Positions of the registration marks are controllable.
  • the setting the screen printing stencils depending on the position of registration marks on the printed matter is of no importance falling relief when converting printing presses to Episode.
  • the quality that can be achieved does not match the requirements common in many cases today.
  • WO 95/00336 discloses a method and a device for Control or regulation of operations of a printing technology Machine in which this consists of two individual print images existing overall print image by an image recording device recorded and used to obtain actual values is used to register deviations determine that then by appropriate Control or regulation of a register setting device used become.
  • the invention is therefore based on the object of a method according to the preamble of claim 1 and a device according to the preamble of claim 9 or 11 modify that a quick changeover, as far as possible should be done automatically, is possible and also a good one Quality of the generally multicolored printed image achieved can be.
  • a major advantage of the invention is that it the printed image and thus the immediate result of the printing process recorded and this result as a benchmark for the assessment of quality used, the latter essentially is determined by the fact that the individual print images on the object are correctly positioned and therefore all individual print images complement each other in an optimal way to the overall print image.
  • the screen printing stencils required for the new lot in the usual way so far, essentially manually, roughly align. The time required for this is proportional low.
  • the fine alignment i.e. the exact coordination of the individual screen printing stencils on the object and so that the individual print images to each other is done automatically, namely about the capture of the print image by the camera system and the comparison of the determined actual print image or the position of the same with the stored target print image.
  • the creation of the target print image or the storage of the same poses no difficulty. So it is possible one after the other enter the individual print images into the computer, the also combined into the resulting overall print image can be.
  • the individual print images can, for example, in Form of the usual slides are present on the screen printing stencil are to be transferred. These slides can be recorded individually by the camera, whereby only ensured via existing registration marks or the like must be that when recording each slide a defined one Takes position. But it is also easily possible the individual print images in the form of digital data below Using a floppy disk or the like in the memory of the computer to enter.
  • the The actual position of the individual print image from the target position is not the position of the printing unit, but that of the following object for carrying out the printing process accordingly to change.
  • screen printing method it would also be possible when using screen printing method.
  • Target position After adjusting the actual position of each individual print image to it Target position can be printed on the following objects without further ongoing comparison between the actual position and Target position are carried out. This will generally be easily possible when printing small batch sizes, since the risk that the actual position of the changes one or another single print image, proportionately is low.
  • the camera systems available today for monitoring of printed images are able to differentiate colors and thus when capturing the overall print image that results from composed of several individual print images, each a specific one Select single print image, which then with the the target print image assigned to it can be compared in the computer can.
  • Such camera systems "resolving" the overall print image are particularly useful for monitoring ongoing production Suitable because they allow only one camera, which then only takes the overall print image to get by.
  • the basic frame of the device shown in Fig. 1 carries a circular ring-shaped table 12 around a vertical axis is gradually rotatable and for holding and Transporting the individual objects to be printed 14 serves at which in this case are CDs.
  • the transport table 12 is provided with brackets 16 which are coaxial with Drive shaft of the table 12 arranged close to the periphery thereof are.
  • the individual objects to be printed are accordingly along a circular transport path towards of the arrow 18 from a pick-up station I to a pick-up station VI transported between which the treatment stations are located.
  • the objects to be printed are marked by known devices associated with table 12 and are not related to the invention, in each in the receiving station I holder 16 inserted.
  • the removal station VI that which is located there in each case printed object using a also not removal device shown removed from the holders.
  • the device is equipped with four screen printing units 20, 21, 22, 23 provided, of which only the template frame in Fig. 1 26 and the screen printing stencil carried by it 27 are shown.
  • FIGS. 5-10 A currently preferred embodiment of a screen printing unit is shown schematically on a larger scale in FIGS. 5-10.
  • the screen printing stencil 27 and squeegee head 32 Printing unit is on two columns 25 of the machine frame 10 guided up and down movable. 5 in particular shows that the printing unit has an upwardly extending vertical Plate 29 which is connected to the machine frame and carries at its upper end a console 30 on which a support rod 31 for the doctor head 32 horizontally displaceable is stored.
  • the support rod 31 is by four Rollers 33 held and guided with an approximately V-shaped profiled lateral surface are provided and with corresponding side limits of the handrail interact.
  • the Back and forth movements of the support rod 31 and thus the doctor head 32 are driven by a suitable Gear 34 causes which meshes with a rack 35, the firmly connected to the top of the support rod 31 is.
  • first carriage 38 On the underside of the console 30 are two guide rails 36 attached, the V-shaped on their facing sides Cutouts are provided.
  • profiled strips 37 which are carried by a first carriage 38.
  • the latter is in the direction of the X axis, i.e. perpendicular to the image plane of FIG. 5, adjustable by a first servomotor 39, the Spindle 40 is fixedly connected to the first carriage 38.
  • the first actuator 39 is supported by a plate 41 which is firmly connected to the frame 10 of the device.
  • the first carriage 38 carries two guide rails on its underside 42, which correspond to the guide rails 36 are profiled and serve to guide two strips 43, which are profiled according to the strips 37.
  • the last 43 are carried by a second carriage 44, which in Direction of the Y axis, that is, in relation to the circular one Transport path of the machine according to FIG. 1, radially within the Guide rails 42 can be pushed back and forth and thus adjustable is.
  • the spindle 46 on first carriage 38 is attached.
  • the first servomotor 39 effected displacement of the first carriage 38 takes place essentially transverse to the longitudinal course of the spindle 46 of the second servomotor 45. This spindle 46 is on the first carriage 38 attached.
  • the second carriage 44 carries two guide rails on the underside 47, corresponding to the guide rails 36 and 42 for first and second carriages 38 and 44 are profiled, however, they run in a circular arc.
  • a third carriage 48 is guided, the lateral limits according to the profile of the guide rails 47 are V-shaped in cross section.
  • the third carriage 48 At the bottom of the third carriage 48 there is essentially one horizontally cantilevered support member 49 fixed, which carries the screen frame 26.
  • the arrangement is made so that the radius of the two guide rails 47th formed arcuate third guide through the center of the screen goes through.
  • the connection is between cantilevered support member 49 for the screen frame 26 and the third carriage 48 form-fitting, so that a Movement of the screen frame 26 relative to the third slide 48 not possible.
  • the setting of the third carriage 48 relative to it second carriage 44 is carried by a third Actuator 51 which is attached to the second carriage 44 and whose spindle 52 has a pin 53 at its free end connected is.
  • the latter can be rotated about a vertical axis in a rear extension 54 of the projecting bracket 49 stored for the screen frame 26.
  • the rotatable bearing is required because the adjustment of the third slide takes place along a circular arc section.
  • a swivel Attaching the third servomotor 51 to the second carriage 44 is not necessary because of the extent of the adjustment is very small, is a maximum of a few mm, and thus the amount of displacement which the pin 53 at one Adjustment of the third slide 48 experiences accordingly is small and in the area of elastic deformability Spindle 52 is.
  • the frame 26 with the screen printing stencil 27 located therein corresponding to the respective requirements in the directions of arrows 77, 78; 92, 93; 52, 55, i.e. linear in two perpendicular to each other standing directions and additionally by means of a Swivel movement.
  • doctor head 32 Since the doctor head 32 is carried by the console 30, the with is connected to the base frame 10 of the machine, the doctor head takes 32 to those that take place essentially in the horizontal plane Adjustment movements of the screen printing stencil not part.
  • the removal station VI is assigned a camera system such that that the object with the overall print image before it out the holder is removed, captured by the camera 58 becomes. It is of course also possible for the camera system to provide a special station in the direction of rotation 18 of the Plates 12 is arranged in front of the removal station VI, if this is necessary for reasons of space requirements, for example should be.
  • Figure 2 shows that the output of the Camera system connected to a computer 62 via a line 60 to which a screen 64 is assigned, on which the respective printed image can be visually displayed can. In the computer 62 the actual position of the camera 58 recorded print image with the one stored in the computer Target position of this print image compared.
  • each individual print images to be applied can enter the computer's memory in such a way that the slides corresponding to the individual print images 68 placed on a light table or the like. 69 and are recorded successively by a camera 70, the each positive on the light table 69 in a defined Is oriented towards the camera so that all of the latter recorded target positions also in relation to each other are set.
  • the sequential single print images are fed to the computer 62 via lines 71, 72 and stored in it.
  • the intermediary Screen 74 is only used to record what is recorded Make single print images visible.
  • the respective slide can 68 After being captured by the camera 70, the respective slide can 68 then in the usual way to produce the respective Print image of the screen printing template 27 are used.
  • the initial setting of the screen printing stencils of the Printing units can have any one instead of objects corresponding replacement-shaped objects used if this is advantageous for cost reasons, so that the "real" objects are only then introduced into the device if all printing units are set correctly. It may also be advantageous for initial setting the screen printing stencils two or more printing processes perform, the template gradually, so after each printing process to a certain extent, from the actual position is brought into the target position. Whether for this initial setting requires several adjustment steps are, can also depend on the size of the difference between the actual position and target position depend.
  • FIG. 11 to 14 is a device for printing on flat individual objects such as credit cards, phone cards or the like.
  • Such cards have a thickness of z. B. 0.6 mm. They are printed using the offset printing process, although it is not excluded that additional other printing processes, e.g. Screen printing, for use come.
  • the offset printing process allows by application of a high resolution raster print the application of detailed print images in many colors and shades.
  • Figure 11 shows that the device is essentially one linear structure has such that the to be printed Objects at one end of the machine from a magazine facility 100 are fed and after passing through several printing stations and other treatment stations on the other end of a collecting device 102 and there the other Treatment or use. Because with this Performance example two objects in pairs by the Device is transported and treated (Fig. 13) the distance between the two devices 100 and 102 bridged by two parallel transport tracks 104, 106 which several successive different transport devices can have. For this and regarding Other features are referred to DE 19534827, whose Disclosure content is included in this application.
  • the device is provided with several offset printing stations, of which, in FIG. 11 of the drawing, stations I, II, III and IV are shown. This can be done in the printing station I applied a primer on the cards whereas at least in some of the following printing stations Single print images with specific colors and one certain patterns are applied and all individual print images complement each other to form an overall print image.
  • an impression cylinder 110 is arranged below the Impression cylinder 108, which the two cards printed in one operation supports during printing, which during the printing process between passed through the two cylinders 108 and 110 in the usual manner become.
  • the impression cylinder 108 is more common Way provided with a printing blanket 112, which is an ink application obtained from a plate cylinder 114 (FIG. 12).
  • the impression cylinder with at least one in provided essentially radially arranged stamp, the opposite the outer surface of the impression cylinder protrudes somewhat and during the printing of those that do not have the cavity Side of the card engages in this cavity.
  • each card 116 of the pair of cards to be printed simultaneously in the transport direction 118 through a pair of belts 120, 122 into an alignment station for the following printing process is transported.
  • a suction bar 124 is arranged, the one with suction openings 126 provided upper boundary surface 128 in a short distance below the level of the transporting Straps 120a, 120b; 122a, 122b.
  • the alignment station everyone of the two transport tracks 104, 106 is an alignment rail 130, 132 assigned to their respective pair of bands facing side carries a guide surface 134, 136.
  • This surface is V-shaped in cross section, like this 14 in particular.
  • the suction strips 124 end in the direction of transport 118 just before the transverse to the direction of transport 118 running plane, in which the guide rails 130, 132 begin.
  • the guide rails each arranged on the outside, i.e. on the side of a pair of belts 120 or 122, which turned away from the other pair of belts is.
  • the pairs of belts 120, 122 end approximately at half the length of the associated guide rails 130 and 132, respectively.
  • Each of the two guide rails 130, 132 is on a mounting rail 138 attached, parallel to the corresponding Guide rail runs and on the machine frame 140 by one vertical axis 142 is pivotally attached.
  • the pivot axis 142 thus runs essentially perpendicular to the main plane of the cards in the transport path 104 or 106 116.
  • Each mounting rail 138 is two servomotors 144, 146 assigned such that the axis of rotation 142 between the two servomotors or the spindles 148, 150 of the same, which are connected to the respective mounting rail 138.
  • each transport track 104, 106 is a double-armed guide finger 152, 154 is provided, which is parallel to the axis 142, vertical axis 156 is pivotable. Every leader finger 152, 154 is on one arm with one on each assigned card 116 provided directed extension 158, which, as can be seen in particular in FIG. 14, likewise provided with a V-shaped guide surface 160 is. The other arm of each guide finger 152, 154 becomes acted upon by a spring 162 such that the arm with the Guide surface 160 against a longitudinal edge of the respectively assigned Card 116 is pressed, as shown in particular in FIG. 13 reveals.
  • the transport device 164 is with two levers controlled by a cam disc 170 172, 174 and a parallelogram carrying the carriers 166, 168 176 provided.
  • cam 170 When driven by cam 170 essentially carry the reciprocating movements in transport direction 118 and opposite to it and downward and upward movements, whereby the drivers when moving against the transport direction 118 below the level of the on belt pairs 120, 122 lying cards 116.
  • Carriers 166, 168 In the top position of the Carriers 166, 168 are located between each two timing belts 120a, 120b and 122a, 122b.
  • Fig. 11 shows that the printed objects before leaving the Device go through a control station V, with a camera system not shown in detail and the other in Provided in connection with Fig. 2 described devices is a comparison of the actual print image or the actual position the same with the target print image or the target position enable the same.
  • the computer of this station V is via lines 184 to those in the individual printing stations associated positioning stations, the servomotors can be designed as conventional stepper motors connected.
  • the two transported towards the printing station Cards 116 are so through the respective pair of belts 120, 122 moved far in the direction of transport 118 that its rear boundary edge 186 behind each in the direction of transport Suction bar 124 is located and thus the driver 166 bw. 168 at the end of its movement against the transport direction 118 moving upward behind the respective card 116 can grab this in his subsequent move in the upper position shown in Figs. 12 and 13 in Advance transport direction 118 in the direction of the printing unit.
  • the card is assigned by the respective one Belt pair 120 or 122 transported so far that the front edge 178 is approximately in the area of the associated Guide finger 152, 154 is located.
  • the die Carriers 166, 168 carrying transport device 164 always executes the same movements as through curves 170 are set by positioning the Driver 166 or 168 by the respective actuator also the position of the map 116 can be set which this is relative to the circumference of the printing cylinder 108 or to it located blanket 112 occupies.
  • a particular orientation of the card 116 with respect to it Elevation is not necessary because of the V-shaped Design of the guide surfaces on the guide rail and thus cooperating guide finger in any case in the card Deepest of the V-shaped recess of both parts is held.
  • the positive connection between card and guide caused by the latter also prevents under the influence of the Driver 166 or 168 forces exerted on the light card the card can make an uncontrolled movement.
  • Guide rail and cooperating leadership fingers is a forced operation, which is effective until the card from Printing unit, ie the two rollers 108, 110 detected and from the guidance formed by the guide rail and guide finger is pulled out.
  • the driver therefore needs 166, 168 in Transport direction 118 to perform only one stroke, which is about the Half of the length of the card 116 corresponds to the transport direction.
  • the basic setting of the printing unit may be chosen so that the arrangement of the printed image on the printing blanket 112 of the printing cylinder 108 is slightly inclined the guide rail 130 or 132 requires such that the distance of the guide rail in the horizontal plane from the Center axis of the transport track 104 or 106 in the transport direction 118 increases slightly. 13 would this means that the distance between the two guide rails 130, 132 or the guide surfaces 134, 136 in the transport direction 118 increases slightly. This ensures that after transportation by the respective carrier 166 or 168 and thereby the alignment of the card 116 in any case maintains its position when it is through the two Rollers 108, 110 of the printing unit from the guide rail and guide finger formed guide is pulled out.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quality & Reliability (AREA)
  • Screen Printers (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Record Information Processing For Printing (AREA)

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Bedrucken von selbsttragenden Einzelobjekten, insbesondere solchen Objekten, deren Erstreckung senkrecht zu der wenigstens einen zu bedruckenden Fläche im allgemeinen relativ klein ist. Es kann sich dabei z. B. um CDs, Telefonkarten, Kreditkarten od. dergl. handeln. Insbesondere bei diesen Objekten sind häufig sehr kleine Losgrößen zu bedrucken. Losgrößen von lediglich mehreren Hundert CDs oder Telefonkarten sind keine Seltenheit. Dies hat zur Folge, daß für das Umrüsten der Druckmaschine von einem Los auf das nächste unverhältnismäßig viel Zeit benötigt wird. Zudem erfordert das Umrüsten, also das Einstellen der Druckwerke auf das Druckbild des jeweils folgende Loses, bei den heute üblichen Maschinen sehr gut ausgebildetes Bedienungspersonal, wenn ein Druckbild mit guter Qualität hergestellt werden soll. Dabei werden die Anforderungen an die Qualität des Druckbildes immer größer.The invention relates to a method and an apparatus for Printing of self-supporting single objects, in particular such objects, the extent of which is perpendicular to the at least one an area to be printed generally relative is small. It can be z. B. CDs, phone cards, Trade credit cards or the like. Especially with these objects very small batch sizes are often to be printed. Lot sizes of just several hundred CDs or phone cards No rarity. This has the consequence that for the conversion of the Printing press disproportionate from one lot to the next a lot of time is needed. In addition, the changeover requires the setting of the printing units on the print image of each the following lots, which are very well trained in today's machines Operating personnel if a printed image with good Quality should be made. The requirements the quality of the printed image is getting bigger.

Aus EP 0488092 B1 ist eine Siebdruckmaschine zum Bedrucken von bahnförmigem Material bekannt, bei welcher auf dem bahnförmigen Material angebrachte Passermarken durch eine Kamera überwacht werden. Die Siebdruckschablonen sind einstellbar angeordnet und dazu mit Stellmotoren versehen, die über einen Rechner in Abhängigkeit von den durch die Kamera festgestellten Positionen der Passermarken steuerbar sind. Die Einstellung der Siebdruckschablonen in Abhängigkeit von der Position von Passermarken auf dem Druckgut hat jedoch keine ins Gewicht fallende Erleichterung beim Umrüsten von Druckmaschinen zur Folge. Außerdem entspricht die damit erreichbare Qualität nicht den in vielen Fällen heute üblichen Anforderungen.EP 0488092 B1 describes a screen printing machine for printing on web-like material is known, in which on the web-shaped Material attached registration marks monitored by a camera become. The screen printing stencils are adjustable and also equipped with servomotors that have a Calculator depending on those detected by the camera Positions of the registration marks are controllable. The setting the screen printing stencils depending on the position of registration marks on the printed matter is of no importance falling relief when converting printing presses to Episode. In addition, the quality that can be achieved does not match the requirements common in many cases today.

WO 95/00336 offenbart ein Verfahren und eine Einrichtung zur Steuerung oder Regelung von Betriebsvorgängen einer drucktechnischen Maschine, bei welcher das aus zwei Einzeldruckbildern bestehende Gesamtdruckbild durch eine Bildaufnahmeeinrichtung erfaßt und zur Gewinnung von Ist-Werten benutzt wird, um Registerabweichungen festzustellen, die dann durch entsprechende Steuerung oder Regelung einer Registereinstellvorrichtung benutzt werden.WO 95/00336 discloses a method and a device for Control or regulation of operations of a printing technology Machine in which this consists of two individual print images existing overall print image by an image recording device recorded and used to obtain actual values is used to register deviations determine that then by appropriate Control or regulation of a register setting device used become.

Entsprechendes gilt auch für eine aus DE 44 33905 A1 bekannte Mehrfarbendruckpresse, bei welcher ein erstes Teildruckbild und ein zweites Teildruckbild erzeugt und miteinander verglichen werden, um im Bedarfsfall die Druckpresse so zu korrigieren, daß das erste und das zweite Bild auf dem Druckbogen einander paßgenau überlagern.The same also applies to a known from DE 44 33905 A1 Multi-color printing press, in which a first partial print image and a second partial print image is generated and compared with one another, to correct the printing press if necessary so that the the first and the second image on the printed sheet fit together perfectly overlay.

Demzufolge liegt der Erfindung die Aufgabe zugrunde, ein Verfahren gemäß dem Oberbegriff des Anspruches 1 und eine Vorrichtung gemäß dem Oberbegriff des Anspruches 9 bzw. 11 so zu modifizieren, daß ein schnelles Umrüsten, das weitestgehend automatisch erfolgen sollte, möglich ist und zudem eine gute Qualität des im allgemeinen mehrfarbigen Druckbildes erreicht werden kann.The invention is therefore based on the object of a method according to the preamble of claim 1 and a device according to the preamble of claim 9 or 11 modify that a quick changeover, as far as possible should be done automatically, is possible and also a good one Quality of the generally multicolored printed image achieved can be.

Diese Aufgabe wird gemäß dem Kennzeichen des Anspruches 1 gelöst. This object is achieved according to the characterizing part of claim 1.

Ein wesentlicher Vorteil der Erfindung besteht darin, daß sie das Druckbild und somit das unmittelbare Ergebnis des Druckvorganges erfaßt und dieses Ergebnis als Maßstab für die Beurteilung der Qualität benutzt, wobei letztere im wesentlichen dadurch bestimmt wird, daß die Einzeldruckbilder auf dem Objekt richtig positioniert sind und somit alle Einzeldruckbilder sich in optimaler Weise zum Gesamtdruckbild ergänzen. Beim Umrüsten der Maschine für das Bedrucken eines neuen Loses reicht es beispielsweise bei einer Siebdruckmaschine aus, die für das neue Los benötigten Siebdruckschablonen zunächst in der bisher üblichen Weise, also im wesentlichen manuell, grob auszurichten. Der dazu erforderliche Zeitaufwand ist verhältnismäßig gering. Die Feinausrichtung, also die genaue Abstimmung der einzelnen Siebdruckschablonen auf das Objekt und damit der Einzeldruckbilder zueinander, erfolgt automatisch, nämlich über das Erfassen des Druckbildes durch das Kamerasystem und den Vergleich des festgestellten Ist-Druckbildes bzw. der Position desselben mit dem gespeicherten Soll-Druckbild.A major advantage of the invention is that it the printed image and thus the immediate result of the printing process recorded and this result as a benchmark for the assessment of quality used, the latter essentially is determined by the fact that the individual print images on the object are correctly positioned and therefore all individual print images complement each other in an optimal way to the overall print image. When converting the machine for printing a new lot it is sufficient for a screen printing machine, for example, the screen printing stencils required for the new lot in the usual way so far, essentially manually, roughly align. The time required for this is proportional low. The fine alignment, i.e. the exact coordination of the individual screen printing stencils on the object and so that the individual print images to each other is done automatically, namely about the capture of the print image by the camera system and the comparison of the determined actual print image or the position of the same with the stored target print image.

Das Herstellen des Soll-Druckbildes bzw. das Speichern desselben bereitet keine Schwierigkeit. So ist es möglich, nacheinander die Einzeldruckbilder in den Rechner einzugeben, die darin auch zum resultierenden Gesamtdruckbild zusammengefügt werden können. Die Einzeldruckbilder können beispielsweise in Form der üblichen Diapositive vorliegen, die auf die Siebdruckschablone zu übertragen sind. Diese Diapositive können von der Kamera einzeln aufgenommen werden, wobei lediglich über ohnehin vorhandene Passermarken oder dgl. sichergestellt sein muß, daß bei der Aufnahme jedes Diapositiv eine definierte Position einnimmt. Es ist aber auch ohne weiteres möglich, die Einzeldruckbilder in Form von digitalen Daten unter Verwendung einer Diskette oder dgl. in den Speicher des Rechners einzugeben.The creation of the target print image or the storage of the same poses no difficulty. So it is possible one after the other enter the individual print images into the computer, the also combined into the resulting overall print image can be. The individual print images can, for example, in Form of the usual slides are present on the screen printing stencil are to be transferred. These slides can be recorded individually by the camera, whereby only ensured via existing registration marks or the like must be that when recording each slide a defined one Takes position. But it is also easily possible the individual print images in the form of digital data below Using a floppy disk or the like in the memory of the computer to enter.

Bei Aufbringen des Einzeldruckbildes auf dem Objekt unter Verwendung eines Druckzylinders, also beispielsweise im Offset-Druckverfahren, kann es vorteilhaft sein, bei Abweichen der Ist-Position des Einzeldruckbildes von der Soll-Position nicht die Position des Druckwerkes, sondern die des folgenden Objektes für die Durchführung des Bedruckungsvorganges entsprechend zu verändern. Dies bedeutet, daß das Objekt, bevor es bedruckt wird, eine entsprechende Ausrichtung erfährt. Selbstverständlich wäre es auch bei Anwendung des Siebdruckes möglich, so zu verfahren. Jedoch ist es bei einem Siebdruckwerk aufgrund seines einfachen Aufbaus im allgemeinen einfacher, das Druckwerk, also die Schablone relativ zum Objekt zu verstellen, welches beim Bedrucken sich in einer Halterung befindet und eine bestimmte Position einnimmt.When applying the single print image on the object using a printing cylinder, for example in the offset printing process, it may be advantageous if the The actual position of the individual print image from the target position is not the position of the printing unit, but that of the following object for carrying out the printing process accordingly to change. This means that the object is printed before it is appropriately aligned. Of course it would also be possible when using screen printing method. However, it is with a screen printing unit due to its simple construction generally easier, the printing unit, So to adjust the template relative to the object that when printing is in a holder and a certain Takes position.

Nach Anpassen der Ist-Position jedes Einzeldruckbildes an dessen Soll-Position kann das Bedrucken der folgenden Objekte ohne weiteren laufenden Vergleich zwischen Ist-Position und Soll-Position duchgeführt werden. Dies wird im allgemeinen beim Bedrucken kleiner Losgrößen ohne weiteres möglich sein, da die Gefahr, daß sich nachträglich die Ist-Position des einen oder anderen Einzeldruckbildes ändert, verhältnismäßig gering ist.After adjusting the actual position of each individual print image to it Target position can be printed on the following objects without further ongoing comparison between the actual position and Target position are carried out. This will generally be easily possible when printing small batch sizes, since the risk that the actual position of the changes one or another single print image, proportionately is low.

Andererseits besteht aber auch die Möglichkeit, die Ist-Druckbilder bei laufender Produktion zu erfassen und mit dem jeweiligen Soll-Druckbild zu vergleichen, so daß Abweichungen sofort erfaßt und korrigiert werden. Es ist unabhängig davon, ob lediglich die Anfangseinstellung der Position der Druckwerke und/oder der Position eines zu bedruckenden Objektes kontrolliert oder ob darüberhinaus auch die laufende Produktion überwacht wird, möglich, das von wenigstens zwei Einzeldruckbildern gebildete Gesamtdruckbild durch ein Kamerasystem zu erfassen und die Darstellung wenigstens einer Ist-Position wenigstens eines Einzeldruckbildes relativ zu dem es tragenden Objekt in dem Rechner mit der Darstellung einer gespeicherten Soll-Position zu vergleichen und in Abhängigkeit vom Ergebnis des Vergleiches eine Korrektur vorzunehmen. Die heute verfügbaren Kamerasysteme zum Überwachen von Druckbildern sind in der Lage, Farben zu differenzieren und somit bei Erfassen des Gesamtdruckbildes, das sich aus mehreren Einzeldruckbildern zusammensetzt, jeweils ein bestimmtes Einzeldruckbild auszuwählen , welches dann mit dem ihm zugeordneten Soll-Druckbild im Rechner verglichen werden kann. Derartige das Gesamtdruckbild "auflösende" Kamerasysteme sind insbesondere für die Überwachung der laufenden Produktion geeignet, da sie es erlauben, mit nur einer Kamera, die dann lediglich das Gesamtdruckbild aufnimmt, auszukommen. On the other hand, there is also the possibility to capture the actual print images during production and to compare with the respective target print image, so that Deviations can be recorded and corrected immediately. It is regardless of whether just the initial setting of the position the printing units and / or the position of one to be printed Property checked or whether beyond ongoing production is monitored, possible by at least two individual print images formed overall print image to capture by a camera system and at least the representation an actual position of at least one individual print image relative to the object carrying it in the computer with the representation compare a stored target position and a correction depending on the result of the comparison to make. The camera systems available today for monitoring of printed images are able to differentiate colors and thus when capturing the overall print image that results from composed of several individual print images, each a specific one Select single print image, which then with the the target print image assigned to it can be compared in the computer can. Such camera systems "resolving" the overall print image are particularly useful for monitoring ongoing production Suitable because they allow only one camera, which then only takes the overall print image to get by.

Die zur Durchführung des vorbeschriebenen Verfahrens verwendeten Vorrichtungen sind zweckmäßigerweise mit Stellmotoren versehen, die in Abhängigkeit vom Ergebnis des Vergleiches von Ist-Position und Soll-Position die Position des Druckwerkes und/oder die des Objektes entsprechend verstellen.Those used to carry out the procedure described above Devices are expediently provided with servomotors, which depending on the result of the comparison of Actual position and target position the position of the printing unit and / or adjust that of the object accordingly.

In der Zeichnung sind einige Ausführungsbeispiele der Erfindung im Schema dargestellt. Es zeigen:

Fig. 1
die Draufsicht einer Vorrichtung zum Bedrucken von flachen Einzelobjekten unter Anwendung des Siebdruckverfahrens,
Fig. 2
der vereinfachte Schaltplan einer Einrichtung zum Einstellen der Druckwerke der Vorrichtung gemäß Fig. 1,
Fig. 3A - 3C
jeweils ein Objekt mit einem Druckbild in stark vereinfachter Darstellung,
Fig. 4
die Draufsicht einer Siebdruckschablone zur Herstellung des Einzeldruckbildes gemäß Fig. 3A und Fig. 3B,
Fig. 5
die Seitenansicht eines Siebdruckwerkes mit zugehöriger Verstelleinrichtung in größerem Maßstab,
Fig. 6
eine Ansicht etwa in Richtung der Pfeile VI-VI der Fig. 5,
Fig. 7
eine Ansicht in Richtung der Pfeile VII-VII der Fig. 5,
Fig. 8
eine Ansicht in Richtung der Pfeile VIII-VIII der Fig. 5,
Fig. 9
eine Ansicht in Richtung der Pfeile IX-IX der Fig. 5,
Fig. 10
eine Ansicht in Richtung der Pfeile X-X der Fig. 5,
Fig. 11
die Seitenansicht einer Druckmaschine zum Bedrucken von Karten,
Fig. 12
den Ausschnitt XII aus Fig. 11 in wesentlich größerem Maßstab,
Fig. 13
eine Ansicht etwa in Richtung der Pfeile XIII - XIII der Fig. 12,
Fig. 14
einen Schnitt nach der Linie XIV - XIV der Fig. 13.
In the drawing, some embodiments of the invention are shown in the diagram. Show it:
Fig. 1
the top view of a device for printing flat individual objects using the screen printing method,
Fig. 2
the simplified circuit diagram of a device for setting the printing units of the device according to FIG. 1,
3A-3C
one object each with a printed image in a highly simplified representation,
Fig. 4
the top view of a screen printing stencil for producing the individual print image according to FIGS. 3A and 3B,
Fig. 5
the side view of a screen printing unit with associated adjustment device on a larger scale,
Fig. 6
a view approximately in the direction of arrows VI-VI of FIG. 5,
Fig. 7
a view in the direction of arrows VII-VII of Fig. 5,
Fig. 8
a view in the direction of arrows VIII-VIII of Fig. 5,
Fig. 9
a view in the direction of arrows IX-IX of Fig. 5,
Fig. 10
a view in the direction of arrows XX of FIG. 5,
Fig. 11
the side view of a printing machine for printing cards,
Fig. 12
the section XII of Fig. 11 on a much larger scale,
Fig. 13
a view approximately in the direction of arrows XIII - XIII of FIG. 12,
Fig. 14
a section along the line XIV - XIV of FIG. 13th

Der Grundrahmen der in Fig. 1 dargestellten Vorrichtung trägt einen runden kreisringförmigen Tisch 12, der um eine vertikale Achse schrittweise rotierbar ist und zum Halten und Transportieren der zu bedruckenden Einzelobjekte 14 dient, bei denen es sich in diesem Fall um CDs handelt. Der Transporttisch 12 ist dazu mit Halterungen 16 versehen, die koaxial zur Antriebswelle des Tisches 12 nahe dem Umfang desselben angeordnet sind. Die zu bedruckenden Einzelobjekte werden demzufolge entlang einer kreisförmigen Transportbahn in Richtung des Pfeiles 18 von einer Aufnahmestation I zu einer Entnahmestation VI transportiert, zwischen denen sich die Behandlungsstationen befinden. Die zu bedruckenden Objekte werden durch bekannte Einrichtungen, die dem Tisch 12 zugeordnet sind und mit der Erfindung in keinem Zusammenhang stehen, in die jeweils in der Aufnahmestation I befindliche Halterung 16 eingelegt. In der Entnahmestation VI wird das dort jeweils befindliche bedruckte Objekt unter Verwendung einer ebenfalls nicht dargestellten Entnahmeeinrichtung aus den Halterungen herausgenommen. Die Vorrichtung ist mit vier Siebdruckwerken 20, 21, 22, 23 versehen, von denen in Fig. 1 jeweils nur der Schablonenrahmen 26 und die von diesem getragene Siebdruckschablone 27 dargestellt sind.The basic frame of the device shown in Fig. 1 carries a circular ring-shaped table 12 around a vertical axis is gradually rotatable and for holding and Transporting the individual objects to be printed 14 serves at which in this case are CDs. The transport table 12 is provided with brackets 16 which are coaxial with Drive shaft of the table 12 arranged close to the periphery thereof are. The individual objects to be printed are accordingly along a circular transport path towards of the arrow 18 from a pick-up station I to a pick-up station VI transported between which the treatment stations are located. The objects to be printed are marked by known devices associated with table 12 and are not related to the invention, in each in the receiving station I holder 16 inserted. In the removal station VI, that which is located there in each case printed object using a also not removal device shown removed from the holders. The device is equipped with four screen printing units 20, 21, 22, 23 provided, of which only the template frame in Fig. 1 26 and the screen printing stencil carried by it 27 are shown.

Eine derzeit bevorzugte Ausgestaltung eines Siebdruckwerkes ist in den Fig. 5 - 10 in größerem Maßstab schematisch dargestellt. Das Siebdruckschablone 27 und Rakelkopf 32 aufweisende Druckwerk ist an zwei Säulen 25 des Maschinenrahmens 10 auf- und abbewegbar geführt. Insbesondere Fig. 5 läßt erkennen, daß das Druckwerk eine nach oben sich erstreckende vertikale Platte 29 aufweist, die mit dem Maschinenrahmen verbunden ist und an ihrem oberen Ende eine Konsole 30 trägt, auf welcher eine Haltestange 31 für den Rakelkopf 32 horizontal verschiebbar gelagert ist. Die Haltestange 31 wird durch vier Rollen 33 gehalten und geführt, die mit einer etwa V-förmig profilierten Mantelfläche versehen sind und mit entsprechenden seitlichen Begrenzungen der Haltestange zusammenwirken. Die Hin- und Herbewegungen der Haltestange 31 und damit des Rakelkopfes 32 werden durch ein in geeigneter Weise angetriebes Zahnrad 34 bewirkt, welches mit eine Zahnstange 35 kämmt, die an der Oberseite der Haltestange 31 fest mit dieser verbunden ist.A currently preferred embodiment of a screen printing unit is shown schematically on a larger scale in FIGS. 5-10. The screen printing stencil 27 and squeegee head 32 Printing unit is on two columns 25 of the machine frame 10 guided up and down movable. 5 in particular shows that the printing unit has an upwardly extending vertical Plate 29 which is connected to the machine frame and carries at its upper end a console 30 on which a support rod 31 for the doctor head 32 horizontally displaceable is stored. The support rod 31 is by four Rollers 33 held and guided with an approximately V-shaped profiled lateral surface are provided and with corresponding side limits of the handrail interact. The Back and forth movements of the support rod 31 and thus the doctor head 32 are driven by a suitable Gear 34 causes which meshes with a rack 35, the firmly connected to the top of the support rod 31 is.

An der Unterseite der Konsole 30 sind zwei Führungsschienen 36 angebracht, die an ihren einander zugekehrten Seiten mit V-förmigen Ausschnitten versehen sind. In diesen Führungsschienen 36 sind entsprechend profililerte Leisten 37 geführt, die von einem ersten Schlitten 38 getragen werden. Letzterer ist in Richtung der X-Achse, also senkrecht zur Bildebene der Fig. 5, durch einen ersten Stellmotor 39 verstellbar, dessen Spindel 40 mit dem ersten Schlitten 38 fest verbunden ist. Der erste Stellmotor 39 wird von einer Platte 41 getragen, die fest mit dem Rahmen 10 der Vorrichtung verbunden ist.On the underside of the console 30 are two guide rails 36 attached, the V-shaped on their facing sides Cutouts are provided. In these guide rails 36 are led according to profiled strips 37 which are carried by a first carriage 38. The latter is in the direction of the X axis, i.e. perpendicular to the image plane of FIG. 5, adjustable by a first servomotor 39, the Spindle 40 is fixedly connected to the first carriage 38. The first actuator 39 is supported by a plate 41 which is firmly connected to the frame 10 of the device.

Der erste Schlitten 38 trägt an seiner Unterseite zwei Führungsschienen 42, die entsprechend den Führungsschienen 36 profiliert sind und zur Führung von zwei Leisten 43 dienen, die entsprechend den Leisten 37 profiliert sind. Die Leisten 43 werden von einem zweiten Schlitten 44 getragen, der in Richtung der Y-Achse, also, bezogen auf die kreisförmige Transportbahn der Maschine gemäß Fig. 1, radial innerhalb der Führungsschienen 42 hin- und herverschiebbar und somit einstellbar ist. Dazu ist ein vom zweiten Schlitten 44 getragener zweiter Stellmotor 45 vorhanden, dessen Spindel 46 am ersten Schlitten 38 befestigt ist. Die durch den ersten Stellmotor 39 bewirkte Verschiebung des ersten Schlittens 38 erfolgt im wesentlichen quer zum Längsverlauf der Spindel 46 des zweiten Stellmotors 45. Diese Spindel 46 ist am ersten Schlitten 38 angebracht.The first carriage 38 carries two guide rails on its underside 42, which correspond to the guide rails 36 are profiled and serve to guide two strips 43, which are profiled according to the strips 37. The last 43 are carried by a second carriage 44, which in Direction of the Y axis, that is, in relation to the circular one Transport path of the machine according to FIG. 1, radially within the Guide rails 42 can be pushed back and forth and thus adjustable is. For this purpose, one carried by the second slide 44 second actuator 45 available, the spindle 46 on first carriage 38 is attached. By the first servomotor 39 effected displacement of the first carriage 38 takes place essentially transverse to the longitudinal course of the spindle 46 of the second servomotor 45. This spindle 46 is on the first carriage 38 attached.

Der zweite Schlitten 44 trägt unterseitig zwei Führungsschienen 47, die entsprechend den Führungsschienen 36 bzw. 42 für ersten bzw. zweiten Schlitten 38 bzw. 44 profiliert sind, jedoch kreisbogenförmig verlaufen. In diesen Führungsschienen ist ein dritter Schlitten 48 geführt, dessen seitliche Begrenzungen entsprechend der Profilierung der Führungsschienen 47 im Querschnitt V-förmig begrenzt sind.The second carriage 44 carries two guide rails on the underside 47, corresponding to the guide rails 36 and 42 for first and second carriages 38 and 44 are profiled, however, they run in a circular arc. In these guide rails a third carriage 48 is guided, the lateral limits according to the profile of the guide rails 47 are V-shaped in cross section.

Am dritten Schlitten 48 ist unterseitig ein im wesentlichen horizontal auskrangendes Tragelement 49 fest angebracht, welches den Siebrahmen 26 trägt. Dabei ist die Anordnung so getroffen, daß der Radius der von den beiden Führungsschienen 47 gebildeten kreisbogenförmigen dritten Führung durch den Siebmittelpunkt hindurchgeht. Zu diesem Zweck ist die Verbindung zwischen auskragendem Tragelement 49 für den Siebrahmen 26 und dem dritten Schlitten 48 formschlüssig ausgeführt, so daß eine Bewegung des Siebrahmens 26 gegenüber dem dritten Schlitten 48 nicht möglich ist.At the bottom of the third carriage 48 there is essentially one horizontally cantilevered support member 49 fixed, which carries the screen frame 26. The arrangement is made so that the radius of the two guide rails 47th formed arcuate third guide through the center of the screen goes through. For this purpose the connection is between cantilevered support member 49 for the screen frame 26 and the third carriage 48 form-fitting, so that a Movement of the screen frame 26 relative to the third slide 48 not possible.

Die Einstellung des dritten Schlittens 48 relativ zu dem ihn tragenden zweiten Schlitten 44 erfolgt durch einen dritten Stellmotor 51, der am zweiten Schlitten 44 befestigt ist und dessen Spindel 52 an ihrem freien Ende mit einem Zapfen 53 verbunden ist. Letzterer ist um eine vertikale Achse drehbar in einem rückseitigen Fortsatz 54 der auskragenden Halterung 49 für den Siebrahmen 26 gelagert. Die drehbare Lagerung ist erforderlich, weil die Verstellung des dritten Schlittens entlang einem Kreisbogenabschnitt erfolgt. Eine schwenkbare Anbringung des dritten Stellmotors 51 am zweiten Schlitten 44 ist jedoch nicht erforderlich, da das Ausmaß der Verstellung jeweils sehr gering ist, maximal wenige mm beträgt, und somit das Ausmaß der Verschiebung, welcher der Zapfen 53 bei einer Verstellung des dritten Schlittens 48 erfährt, entsprechend klein ist und im Bereich der elastischen Verformbarkeit der Spindel 52 liegt.The setting of the third carriage 48 relative to it second carriage 44 is carried by a third Actuator 51 which is attached to the second carriage 44 and whose spindle 52 has a pin 53 at its free end connected is. The latter can be rotated about a vertical axis in a rear extension 54 of the projecting bracket 49 stored for the screen frame 26. The rotatable bearing is required because the adjustment of the third slide takes place along a circular arc section. A swivel Attaching the third servomotor 51 to the second carriage 44 however, is not necessary because of the extent of the adjustment is very small, is a maximum of a few mm, and thus the amount of displacement which the pin 53 at one Adjustment of the third slide 48 experiences accordingly is small and in the area of elastic deformability Spindle 52 is.

Durch die Stellmotoren 39, 45 und 51 kann der Rahmen 26 mit der darin befindlichen Siebdruckschablone 27 entsprechend den jeweiligen Erfordernissen in den Richtungen der Pfeile 77, 78; 92, 93; 52, 55, also linear in zwei senkrecht aufeinander stehenden Richtungen und zusätzlich mittels einer Schwenkbewegung, eingestellt werden.By the servomotors 39, 45 and 51, the frame 26 with the screen printing stencil 27 located therein corresponding to the respective requirements in the directions of arrows 77, 78; 92, 93; 52, 55, i.e. linear in two perpendicular to each other standing directions and additionally by means of a Swivel movement.

Da der Rakelkopf 32 von der Konsole 30 getragen wird, die mit dem Grundrahmen 10 der Maschine verbunden ist, nimmt der Rakelkopf 32 an den im wesentlichen in horizontaler Ebene erfolgenden Einstellbewegungen der Siebdruckschablone nicht teil.Since the doctor head 32 is carried by the console 30, the with is connected to the base frame 10 of the machine, the doctor head takes 32 to those that take place essentially in the horizontal plane Adjustment movements of the screen printing stencil not part.

Auf die in den Halterungen 16 des schrittweise rotierenden Tisches 12 befindlichen Objekte wird in den einzelnen Druckstationen II, III, IV, V jeweils ein Einzeldruckbild aufgebracht, wobei sich sämtliche Einzeldruckbilder auf jedem Objekt nach Passieren der Druckstation V zu einem Gesamtdruckbild ergänzen, das sich bei dem in den Figuren 1 und 2 dargestellten Ausführungsbeispiel aus vier Teildruckbildern zusammensetzt. Hinter den Druckstationen II und V ist jeweils ein Trockner 57 zum Trocknen der in der jeweils vorangegangenen Station aufgebrachten Druckfarbe angeordnet. Derartige Trockner können auch den anderen Druckstationen III und IV nachgeschaltet sein.On the gradually rotating table in the holders 16 12 objects located in the individual printing stations II, III, IV, V each applied a single print image, where all individual print images on each object Passing the printing station V to complete an overall print image, which is shown in the figures 1 and 2 Embodiment composed of four partial print images. There is a dryer 57 behind each of the printing stations II and V. to dry the applied in the previous station Ink arranged. Such dryers can also downstream of the other printing stations III and IV.

Der Entnahmestation VI ist ein Kamerasystem derart zugeordnet, daß das mit dem Gesamtdruckbild versehene Objekt, bevor es aus der Halterung herausgenommen wird, von der Kamera 58 erfaßt wird. Es ist natürlich auch möglich, für das Kamerasystem eine besondere Station vorzusehen, die in Drehrichtung 18 des Tellers 12 vor der Entnahmestation VI angeordnet ist, falls dies beispielsweise aus Gründen des Platzbedarfs erforderlich sein sollte. Figur 2 läßt erkennen, daß der Ausgang des Kamerasystems über eine Leitung 60 mit einem Rechner 62 verbunden ist, dem ein Bildschirm 64 zugeordnet ist, auf welchem das jeweils aufgenommene Druckbild visuell dargestellt werden kann. Im Rechner 62 wird die Ist-Position des von der Kamera 58 aufgenommenen Druckbildes mit der im Rechner gespeicherten Soll-Position dieses Druckbildes verglichen. Das Ergebnis des Vergleiches wird über eine Leitung 65 einer programmierbaren Steuereinrichtung 66 zugeführt, von welcher Leitungen 20a, 21a, 22a, 23a zu den Stellmotoren 39, 45, 51 der einzelnen Druckwerke in den Druckstationen 20, 21, 22, 23 führen.The removal station VI is assigned a camera system such that that the object with the overall print image before it out the holder is removed, captured by the camera 58 becomes. It is of course also possible for the camera system to provide a special station in the direction of rotation 18 of the Plates 12 is arranged in front of the removal station VI, if this is necessary for reasons of space requirements, for example should be. Figure 2 shows that the output of the Camera system connected to a computer 62 via a line 60 to which a screen 64 is assigned, on which the respective printed image can be visually displayed can. In the computer 62 the actual position of the camera 58 recorded print image with the one stored in the computer Target position of this print image compared. The result of Comparison is made via a line 65 of a programmable Control device 66 supplied, from which lines 20a, 21a, 22a, 23a to the servomotors 39, 45, 51 of the individual Guide printing units in the printing stations 20, 21, 22, 23.

Die im Rechner 62 gespeicherten Soll-Positionen der in den Stationen 20, 21, 22, 23 jeweils aufzubringenden Einzeldruckbilder können dem Speicher des Rechners in der Weise eingegeben werden, daß die den Einzeldruckbildern entsprechenden Diapositive 68 auf einen Leuchttisch oder dergl. 69 gelegt und nacheinander von einer Kamera 70 aufgenommen werden, wobei das jeweils auf dem Leuchttisch 69 befindliche Positiv in definierter Weise zur Kamera ausgerichtet ist, so daß alle von letzterer aufgenommenen Soll-Positionen auch in Relation zueinander festgelegt sind. Die nacheinander aufgenommenen Einzeldruckbilder werden über Leitungen 71, 72 dem Rechner 62 zugeführt und in diesem gespeichert. Der zwischengeschaltete Bildschirm 74 dient lediglich dazu, das jeweils aufgenommene Einzeldruckbild sichtbar zu machen.The target positions stored in the computer 62 in the Stations 20, 21, 22, 23 each individual print images to be applied can enter the computer's memory in such a way that the slides corresponding to the individual print images 68 placed on a light table or the like. 69 and are recorded successively by a camera 70, the each positive on the light table 69 in a defined Is oriented towards the camera so that all of the latter recorded target positions also in relation to each other are set. The sequential single print images are fed to the computer 62 via lines 71, 72 and stored in it. The intermediary Screen 74 is only used to record what is recorded Make single print images visible.

Nach Erfassen durch die Kamera 70 kann das jeweilige Diapositiv 68 dann in üblicher Weise zur Herstellung des jeweiligen Druckbildes der Siebdruckschablone 27 benutzt werden.After being captured by the camera 70, the respective slide can 68 then in the usual way to produce the respective Print image of the screen printing template 27 are used.

Abweichend von der Erfassung der jeweiligen Soll-Position durch die Kamera 70 besteht aber auch die Möglichkeit, der Soll-Position entsprechende Daten auf einem Datenträger direkt in den Rechner 62 einzuführen, wie dies durch den Pfeil 76 in Figur 2 angedeutet ist.Deviating from the acquisition of the respective target position through the camera 70 there is also the possibility of Corresponding position corresponding data directly on a data carrier introduce into the computer 62, as indicated by the arrow 76 in Figure 2 is indicated.

Zum Einstellen der Siebdruckschablonen der Druckwerke 20, 21, 22, 23 in den Stationen II - V nach einem Wechsel der Schablonen wird so vorgegangen, daß zunächst zur Einstellung der Siebdruckschablone 27 des Druckwerkes 20 lediglich ein Objekt in der Station II mit einem Einzeldruckbild versehen und dann nach Passieren der folgenden Stationen in der Entnahmestation VI durch das Kamerasystem 58 erfaßt wird. Dann erfolgt im Rechner 62 der Vergleich der erfaßten Ist-Position mit der Soll-Position dieses in der Druckstation II hergestellten Einzeldruckbildes. Bei einer Abweichung der Ist-Position von der Soll-Position erfolgt durch entsprechende Betätigung wenigstens eines der Stellmotoren eine Korrektur der Position der Siebdruckschablone 27 des Druckwerkes 20. Wenn z. B. Fig. 3A die Soll-Position und Fig. 3B die Ist-Position des in der Station II aufgebrachten Einzeldruckbildes zeigt, hätte ein Vergleich dieser Ist-Position mit der Soll-Position zur Folge, daß über die Steuereinrichtung 66 und die der Druckstation II zugeordnete Leitung 20a der Stellmotor 39 derart eingeschaltet wird, daß die vom Rahmen 26 getragene Siebdruckschablone 27 eine Verschiebung in Richtung des Pfeiles 78 erfährt, die der Distanz 80 entspricht, um welche die Ist-Position von der Soll-Position abweicht.For setting the screen printing stencils of the printing units 20, 21, 22, 23 in stations II - V after changing the templates is proceeded so that initially to the setting the screen printing stencil 27 of the printing unit 20 is only an object provided with a single print image in station II and then after passing the following stations in the removal station VI is detected by the camera system 58. Then done in the computer 62 the comparison of the detected actual position with the Target position of this manufactured in the printing station II Single print image. If the actual position deviates from the target position is carried out by appropriate actuation at least one of the servomotors corrects the position the screen printing template 27 of the printing unit 20. If z. B. Fig. 3A the target position and FIG. 3B the actual position of the in the Station II shows the individual print image applied, would have one Comparison of this actual position with the target position, that via the control device 66 and that of the printing station II assigned line 20a of the servomotor 39 switched on in this way is that the screen printing stencil 27 carried by the frame 26 experiences a shift in the direction of arrow 78, which the Distance 80 corresponds to the actual position of the Target position deviates.

Nach richtiger Einstellung der Siebdruckschablone des in der Station II befindlichen Siebdruckwerkes 20 würde die Siebdruckschablone des Druckwerkes 21 in der Druckstation III in entsprechender Weise eingestellt werden, wobei dann zur Durchführung des Vergleichs die Soll-Position des Druckwerkes 21 im Rechner 62 wirksam gestellt werden müßte. Die Siebdruckschablonen der anderen Stationen würden in entsprechender Weise eingestellt werden. Nach Einstellung der Siebdruckschablonen sämtlicher Druckwerke kann dann mit dem Drucken im Rahmen der normalen Produktion begonnen werden.After correct setting of the screen printing template in the Station II located screen printing unit 20 would be the screen printing template of the printing unit 21 in the printing station III in be set accordingly, then to carry out the comparison of the target position of the printing unit 21 in Computer 62 should be made effective. The screen printing stencils the other stations would do the same can be set. After setting the screen printing stencils All printing units can then start printing as part of the normal production can be started.

Es ist auch möglich, nach der vor Beginn der Produktion erfolgenden abschließenden Einstellung der Siebdruckschablonen zur Anpassung an die jeweilige Soll-Position die Qualität des Gesamtdruckbildes auch während der anschließenden Produktion durch Vergleichen der jeweiligen Ist-Positionen der Einzeldruckbilder mit der jeweils zugehörigen Soll-Position stichprobenartig oder fortlaufend zu überwachen, um so Abweichungen, die während des normalen Produktionsbetriebes eintreten könnten, zu erfassen und zu korrigieren.It is also possible to start after the final cessation of production Screen printing stencils for adaptation to the respective target position the quality of the overall print image even during the subsequent production by comparing the respective Actual positions of the individual print images with the corresponding ones Monitor target position on a random or continuous basis, the more deviations that occur during normal Production company could enter, record and to correct.

Für das anfängliche Einstellen der Siebdruckschablonen der Druckwerke können anstelle von Objekten irgendwelche eine entsprechende Gestalt aufweisende Ersatz-Objekte verwendet werden, falls dies aus Kostengründen vorteilhaft ist, so daß die "echten" Objekte erst dann in die Vorrichtung eingeführt werden, wenn sämtliche Druckwerke richtig eingestellt sind. Es kann gegebenenfalls auch vorteilhaft sein, zur Anfangseinstellung der Siebdruckschablonen zwei oder mehr Bedruckungsvorgänge durchzuführen, wobei die Schablone schrittweise, also nach jedem Bedruckungsvorgang um ein bestimmtes Ausmaß, von der Ist-Position in die Soll-Position gebracht wird. Ob für diese Anfangseinstellung mehrere Stellschritte erforderlich sind, kann auch von der Größe der Differenz zwischen Ist-Position und Soll-Position abhängen.For the initial setting of the screen printing stencils of the Printing units can have any one instead of objects corresponding replacement-shaped objects used if this is advantageous for cost reasons, so that the "real" objects are only then introduced into the device if all printing units are set correctly. It may also be advantageous for initial setting the screen printing stencils two or more printing processes perform, the template gradually, so after each printing process to a certain extent, from the actual position is brought into the target position. Whether for this initial setting requires several adjustment steps are, can also depend on the size of the difference between the actual position and target position depend.

Bei dem in den Figuren 11 bis 14 dargestellten Ausführungsbeispiel handelt es sich um eine Vorrichtung zum Bedrucken von flachen Einzelobjekten wie Kreditkarten, Telefonkarten oder dergleichen. Derartige Karten haben eine Dicke von z. B. 0,6 mm. Sie werden unter Anwendung des Offset-Druckverfahrens bedruckt, wobei allerdings nicht ausgeschlossen ist, daß zusätzlich auch andere Druckverfahren, z.B. Siebdruck, zur Anwendung kommen. Das Offset-Druckverfahren erlaubt jedoch durch Anwendung eines hoch aufgelöstenn Rasterdrucks das Aufbringen von detailgenauen Druckbildern in vielen Farben und Zwischentönen.In the embodiment shown in Figures 11 to 14 is a device for printing on flat individual objects such as credit cards, phone cards or the like. Such cards have a thickness of z. B. 0.6 mm. They are printed using the offset printing process, although it is not excluded that additional other printing processes, e.g. Screen printing, for use come. However, the offset printing process allows by application of a high resolution raster print the application of detailed print images in many colors and shades.

Figur 11 läßt erkennen, daß die Vorrichtung einen im wesentlichen linearen Aufbau aufweist derart, daß die zu bedruckendne Objekte an einem Ende der Maschine aus einer Magazineinrichtung 100 zugeführt werden und nach Durchlaufen mehrerer Druckstationen und anderer Behandlungsstationen am anderen Ende von einer Sammeleinrichtung 102 aufgenommen und dort der weiteren Behandlung oder Verwendung zugeführt werden. Da bei diesem Auführungsbeispiel jeweils zwei Objekte paarweise durch die Vorrichtung transportiert und behandelt werden (Fig. 13), wird der Abstand zwischen den beiden Einrichtungen 100 und 102 durch zwei parallele Transportbahnen 104, 106 überbrückt, die jeweils mehrere aufeinander folgende unterschiedliche Transporteinrich-tungen aufweisen können. Hierzu und bezüglich anderer Merkmale wird auf DE 19534827 verwiesen, deren Offenbarungsgehalt in diese Anmeldung einbezogen wird.Figure 11 shows that the device is essentially one linear structure has such that the to be printed Objects at one end of the machine from a magazine facility 100 are fed and after passing through several printing stations and other treatment stations on the other end of a collecting device 102 and there the other Treatment or use. Because with this Performance example two objects in pairs by the Device is transported and treated (Fig. 13) the distance between the two devices 100 and 102 bridged by two parallel transport tracks 104, 106 which several successive different transport devices can have. For this and regarding Other features are referred to DE 19534827, whose Disclosure content is included in this application.

Die Vorrichtung ist mit mehreren Offset-Druckstationen versehen, von denen in Figur 11 der Zeichnung die Stationen I, II, III und IV dargestellt sind. Dabei kann die in der Druckstation I eine Grundierung (Primer) auf den Karten aufgebracht werden, wohingegen zumindest in einigen der folgenden Druckstationen Einzeldruckbilder mit bestimmten Farben und einem bestimmten Muster aufgebracht werden und alle Einzeldruckbilder sich zu einem Gesamtdruckbild ergänzen. Unterhalb des Druckzylinders 108 ist ein Gegendruckzylinder 110 angeordnet, welcher die beiden in einem Arbeitsgang bedruckten Karten während des Bedruckens abstützt, die beim Druckvorgang zwischen den beiden Zylindern 108 und 110 in üblicher Weise hindurchgeführt werden. Der Druckzylinder 108 ist in üblicher Weise mit einem Drucktuch 112 versehen, welches einen Farbauftrag von einem Klischeezylinder 114 erhält (Fig. 12).The device is provided with several offset printing stations, of which, in FIG. 11 of the drawing, stations I, II, III and IV are shown. This can be done in the printing station I applied a primer on the cards whereas at least in some of the following printing stations Single print images with specific colors and one certain patterns are applied and all individual print images complement each other to form an overall print image. Below the Impression cylinder 108, an impression cylinder 110 is arranged, which the two cards printed in one operation supports during printing, which during the printing process between passed through the two cylinders 108 and 110 in the usual manner become. The impression cylinder 108 is more common Way provided with a printing blanket 112, which is an ink application obtained from a plate cylinder 114 (FIG. 12).

In den Fällen, in denen die zu bedruckenden Karten mit einer Kavität für einen Chip oder dergleichen versehen sind, ist es erforderlich, während des Bedruckens der nicht mit der Kavität versehenen ebenen Oberfläche der Karte letztere an der dieser Oberfläche gegenüberliegende Seite gesondert abzustützen. Zu diesem Zweck ist der Gegendruckzylinder mit wenigsten einem im wesentlichen radial angeordneten Stempel versehen, der gegenüber der Mantelfläche des Gegendruckzylinders etwas vorsteht und während des Bedruckens der die Kavität nicht aufweisenden Seite der Karte in diese Kavität eingreift.In cases where the cards to be printed with a Are provided for a chip or the like, it is required while printing on the non-cavity provided flat surface of the card the latter on this Support the surface on the opposite side separately. To For this purpose, the impression cylinder with at least one in provided essentially radially arranged stamp, the opposite the outer surface of the impression cylinder protrudes somewhat and during the printing of those that do not have the cavity Side of the card engages in this cavity.

Die Tatsache, daß in mehreren aufeinander folgenden Druckstationen Einzeldruckbilder aufgebracht werden, die sich zu einem Gesamtdruckbild ergänzen, machen ein sorgfältiges Ausrichten der Karten zum jeweiligen Druckwerk erforderlich. Darüber hinaus macht auch das Vorhandensein des vorerwähnten Stempels eine genaue Ausrichtung zum Gegendruckzylinder erforderlich.The fact that in several consecutive printing stations Single print images are applied that become one Complete overall print image, make careful alignment the cards for the respective printing unit required. Furthermore also makes the presence of the aforementioned stamp precise alignment with the impression cylinder is required.

Die Fig. 12 und 13 lassen erkennen, daß jede Karte 116 des gleichzeitig zu bedruckenden Kartenpaares in Transportrichtung 118 durch ein Riemenpaar 120, 122 in eine Ausrichtstation für den folgenden Bedruckungsvorgang transportiert wird. Zwischen den beiden Riemen 120a, 120b bzw. 122a, 122b jedes Riemenpaares ist eine Saugleiste 124 angeordnet, deren mit Saugöffnungen 126 versehene obere Begrenzungsfläche 128 sich in einem geringen Abstand unterhalb des Niveaus der transportierenden Riemen 120a, 120b; 122a, 122b befindet. Durch den mittels der Saugwirkung unterhalb der Karten erzeugten Unterdruck werden diese gegen die sie tragenden Riemen gedrückt, so daß auch bei hoher Transportgeschwindigkeit eine Mitnahme der Karten und eine sichere Positionierung auf den Riemen des jeweiligen Riemenpaares gewährleistet ist. Der Ausrichtstation jeder der beiden Transportbahnen 104, 106 ist eine Ausrichtschiene 130, 132 zugeordnet, die an ihrer dem jeweiligen Bandpaar zugekehrten Seite eine Führungsfläche 134, 136 trägt. Diese Fläche ist im Querschnitt V-förmig ausgebildet, wie dies insbesondere Fig. 14 erkennen läßt. Die Saugleisten 124 enden in Transportrichtung 118 kurz vor der quer zur Transportrichtung 118 verlaufenden Ebene, in welcher die Führungsschienen 130, 132 beginnen. Aus Platzgründen sind bei dem in der Zeichnung dargestellten Ausführungsbeispiel die Führungsschienen jeweils außen angeordnet, also an der Seite eines Riemenpaares 120 bzw. 122, welche dem jeweils anderen Riemenpaar abgekehrt ist. Die Riemenpaare 120, 122 enden etwa auf der halben Länge der jeweils zugehörigen Führungsschienen 130 bzw. 132.12 and 13 show that each card 116 of the pair of cards to be printed simultaneously in the transport direction 118 through a pair of belts 120, 122 into an alignment station for the following printing process is transported. Between the two belts 120a, 120b and 122a, 122b of each pair of belts a suction bar 124 is arranged, the one with suction openings 126 provided upper boundary surface 128 in a short distance below the level of the transporting Straps 120a, 120b; 122a, 122b. By means of the suction created below the cards these are pressed against the straps carrying them, so that Take your cards with you even at high transport speeds and secure positioning on the belt of each Belt pair is guaranteed. The alignment station everyone of the two transport tracks 104, 106 is an alignment rail 130, 132 assigned to their respective pair of bands facing side carries a guide surface 134, 136. This surface is V-shaped in cross section, like this 14 in particular. The suction strips 124 end in the direction of transport 118 just before the transverse to the direction of transport 118 running plane, in which the guide rails 130, 132 begin. For reasons of space are in the in the drawing illustrated embodiment, the guide rails each arranged on the outside, i.e. on the side of a pair of belts 120 or 122, which turned away from the other pair of belts is. The pairs of belts 120, 122 end approximately at half the length of the associated guide rails 130 and 132, respectively.

Jede der beiden Führungsschienen 130, 132 ist an einer Tragschiene 138 angebracht, die parallel zur jeweils zugehörigen Führungsschiene verläuft und am Maschinenrahmen 140 um eine vertikale Achse 142 schwenkbar angebracht ist. Die Schwenkachse 142 verläuft somit im wesentlichen senkrecht zur Hauptebene der in der Transportbahn 104 bzw. 106 befindlichen Karten 116. Jeder Tragschiene 138 sind zwei Stellmotore 144, 146 zugeordnet derart, daß die Drehachse 142 sich zwischen den beiden Stellmotoren bzw. den Spindeln 148, 150 derselben befindet, die mit der jeweiligen Tragschiene 138 verbunden sind.Each of the two guide rails 130, 132 is on a mounting rail 138 attached, parallel to the corresponding Guide rail runs and on the machine frame 140 by one vertical axis 142 is pivotally attached. The pivot axis 142 thus runs essentially perpendicular to the main plane of the cards in the transport path 104 or 106 116. Each mounting rail 138 is two servomotors 144, 146 assigned such that the axis of rotation 142 between the two servomotors or the spindles 148, 150 of the same, which are connected to the respective mounting rail 138.

An der der Führungsschiene 130, 132 gegenüberliegenden Seite jeder Transportbahn 104, 106 ist ein doppelarmiger Führungsfinger 152, 154 vorgesehen, der um eine zur Ache 142 parallele, also vertikale Achse 156 schwenkbar ist. Jeder Führungsfinger 152, 154 ist an seinem einen Arm mit einer auf die jeweils zugeordnete Karte 116 gerichteten Fortsatz 158 versehen, der, wie dies insbesondere Fig. 14 erkennen läßt, ebenfalls mit einer im Querschnitt V-förmigen Führungsfläche 160 versehen ist. Der andere Arm jedes Führungsfingers 152, 154 wird durch eine Feder 162 beaufschlagt derart, daß der Arm mit der Führungsfläche 160 gegen eine Längskante der jeweils zugeordneten Karte 116 gedrückt wird, wie dies insbesondere Fig. 13 erkennen läßt.On the side opposite the guide rail 130, 132 each transport track 104, 106 is a double-armed guide finger 152, 154 is provided, which is parallel to the axis 142, vertical axis 156 is pivotable. Every leader finger 152, 154 is on one arm with one on each assigned card 116 provided directed extension 158, which, as can be seen in particular in FIG. 14, likewise provided with a V-shaped guide surface 160 is. The other arm of each guide finger 152, 154 becomes acted upon by a spring 162 such that the arm with the Guide surface 160 against a longitudinal edge of the respectively assigned Card 116 is pressed, as shown in particular in FIG. 13 reveals.

Für den Transport der Karten 116 in das Druckwerk ist eine zusätzliche Transporteinrichtung 164 vorhanden, die zwei Mitnehmer 166, 168 aufweist, von denen jeweils einer einer der beiden Transportbahnen 104, 106 bzw. dem jeweils zugehörigen Riemenpaar 120, 122 zugeordnet ist. Die Transporteinrichtung 164 ist mit zwei von einer Kurvenscheibe 170 gesteuerten Hebeln 172, 174 und einem die Mitnehmer 166, 168 tragenden Parallelogramm 176 versehen. Bei Antrieb durch die Kurvenscheibe 170 führen die Mitnehmer hin- und hergehende Bewegungen im wesentlichen in Transportrichtung 118 und entgegengesetzt dazu und nach unten sowie nach oben gerichtete Bewegungen aus, wobei die Mitnehmer bei der Bewegung entgegen der Transportrichtung 118 sich unterhalb des Niveaus der auf Riemenpaaren 120, 122 liegenden Karten 116 befinden. In der oberen Position der Mitnehmer 166, 168 befinden sich diese jeweils zwischen den beiden Zahnriemen 120a, 120b bzw. 122a, 122b. Dabei greifen die Mitnehmer hinter die auf dem jeweiligen Riemenpaar liegende Karte, die dann durch den Mitnehmer in Transportrichtung 118 vorgeschoben wird, bis die Karte mit ihrem in Transportrichtung vorderen Rand von den beiden Zylindern 108, 110 des Druckwerkes erfaßt und im Zuge der Bedruckung durch diese in Richtung auf zwei nachgeordnete Riemenpaare 190, 192 bewegt wird.There is an additional one for transporting the cards 116 into the printing unit Transport device 164 available, the two carriers 166, 168, one of which is one of the two Transport tracks 104, 106 or the respective pair of belts 120, 122 is assigned. The transport device 164 is with two levers controlled by a cam disc 170 172, 174 and a parallelogram carrying the carriers 166, 168 176 provided. When driven by cam 170 essentially carry the reciprocating movements in transport direction 118 and opposite to it and downward and upward movements, whereby the drivers when moving against the transport direction 118 below the level of the on belt pairs 120, 122 lying cards 116. In the top position of the Carriers 166, 168 are located between each two timing belts 120a, 120b and 122a, 122b. Grab it the drivers behind the one lying on the respective pair of belts Card, which is then carried by the carrier in the direction of transport 118 is advanced until the card is in the direction of transport front edge of the two cylinders 108, 110 des Printing unit detected and in the course of printing by this in Moved towards two downstream belt pairs 190, 192 becomes.

Wichtig ist dabei, daß die Mitnehmer 166, 168 unter Zwischenschaltung von Stellmotoren 180, 182 von der Transporteinrichtung 164 getragen werden derart, daß die Position des jeweiligen Mitnehmers in Transportrichtung 118 und entgegengesetzt dazu relativ zur Transporteinrichtung 164 verstellt werden kann.It is important that the drivers 166, 168 with the interposition of servomotors 180, 182 from the transport device 164 are worn so that the position of each Driver in transport direction 118 and opposite to be adjusted relative to the transport device 164 can.

Fig. 11 zeigt, daß die bedruckten Objekte vor Verlassen der Vorrichtung eine Kontrollstation V durchlaufen, die mit einem im Detail nicht dargestellten Kamerasystem und den anderen im Zusammenhang mit Fig. 2 beschriebenen Einrichtungen versehen ist, die einen Vergleich des Ist-Druckbildes bzw. der Ist-Position desselben mit dem Soll-Druckbild bzw. der Soll-Position desselben ermöglichen. Der Rechner dieser Station V ist über Leitungen 184 mit den in den den einzelnen Druckstationen zugeordneten Ausrichtestationen befindlichen Stellmotoren, die als übliche Schrittmotoren ausgebildet sein können, verbunden.Fig. 11 shows that the printed objects before leaving the Device go through a control station V, with a camera system not shown in detail and the other in Provided in connection with Fig. 2 described devices is a comparison of the actual print image or the actual position the same with the target print image or the target position enable the same. The computer of this station V is via lines 184 to those in the individual printing stations associated positioning stations, the servomotors can be designed as conventional stepper motors connected.

Die beiden in Richtung auf die Druckstation transportierten Karten 116 werden durch das jeweilige Riemenpaar 120, 122 so weit in Transportrichtung 118 bewegt, daß ihre hintere Begrenzungskante 186 sich in Transportrichtung hinter der jeweiligen Saugleiste 124 befindet und somit der Mitnehmer 166 bw. 168 am Ende seiner Bewegung entgegen der Transportrichtung 118 nach oben sich bewegend hinter die jeweilige Karte 116 greifen kann, um diese bei seiner darauffolgenden Bewegung in der oberen, in den Fig. 12 und 13 dargestellten Position in Transportrichtung 118 in Richtung auf das Druckwerk vorzuschieben. Normalerweise wird die Karte durch das jeweils zugeordnete Riemenpaar 120 bzw. 122 so weit transportiert, daß der vordere Rand 178 sich etwa im Bereich des zugehörigen Führungsfingers 152, 154 befindet. Aufgrund der Beaufschlagung desselben durch die Feder 162 ergibt sich ein gewisser Reibungswiderstand, der eine weitere Mitnahme der Karte durch das Riemenpaar 120 zw. 122 verhindert. Dabei nimmt aber, wie bereits erwähnt, die Karte eine Position ein, welche es dem jeweiligen Mitnehmer 166, 168 ermöglicht, die Karte an ihrem hinteren Rand 186 zu hintergreifen, so daß die weitere Bewegung der Karte in Transportrichtung 118 durch den Mitnehmer erfolgt, der auch den Reibungswiderstand zwischen der Führungsschiene 130 bzw. 132 und dem zugehörigen Führungsfinger 152 bz. 154 überwindet. Bei dieser Bewegung entlang der Führungsschiene erfährt die Karte aufgrund des durch den Führungsfinger erfolgenden Andruckes gegen die Führungsschiene eine Ausrichtung quer zur Transportrichtung, die durch die Position der Führungsschiene 130 bzw. 132 bestimmt wird. Die Ausrichtung der Karte in Transportrichtung 118 erfolgt durch die Position des jeweiligen Mitnehmers 166, 168. Da die die Mitnehmer 166, 168 tragende Transporteinrichtung 164 immer dieselben Bewegungen ausführt, die durch die Kurven 170 festgelegt sind, kann durch entsprechende Positionierung des Mitnehmers 166 bzw. 168 durch den jeweils zugehörigen Stellmotor auch die Position der Karte 116 festgelegt werden, die diese relativ zum Umfang des Druckzylinders 108 bzw. zum darauf befindlichen Drucktuch 112 einnimmt.The two transported towards the printing station Cards 116 are so through the respective pair of belts 120, 122 moved far in the direction of transport 118 that its rear boundary edge 186 behind each in the direction of transport Suction bar 124 is located and thus the driver 166 bw. 168 at the end of its movement against the transport direction 118 moving upward behind the respective card 116 can grab this in his subsequent move in the upper position shown in Figs. 12 and 13 in Advance transport direction 118 in the direction of the printing unit. Usually the card is assigned by the respective one Belt pair 120 or 122 transported so far that the front edge 178 is approximately in the area of the associated Guide finger 152, 154 is located. Because of the exposure by the spring 162 there is a certain frictional resistance, who took another card with them Belt pair 120 between 122 prevented. However, as already mentioned, mentions the card a position that it the respective carrier 166, 168 allows the card on their reach behind the rear edge 186 so that the further movement the card in the direction of transport 118 by the driver takes place, which is also the frictional resistance between the Guide rail 130 or 132 and the associated guide finger 152 and 154 overcomes. With this movement along the The guide rail experiences the card on the basis of the guide finger pressure against the guide rail an orientation transverse to the direction of transport, which by the Position of the guide rail 130 and 132 is determined. The The card is aligned in the transport direction 118 by the position of the respective driver 166, 168. Since the die Carriers 166, 168 carrying transport device 164 always executes the same movements as through curves 170 are set by positioning the Driver 166 or 168 by the respective actuator also the position of the map 116 can be set which this is relative to the circumference of the printing cylinder 108 or to it located blanket 112 occupies.

Der wesentliche Unterschied zwischen dem Ausführungsbeispiel gemäß den Fig. 11 - 14 und der Ausführungsform gemäß den Fig. 1 - 10 besteht darin, daß bei letzterem die Druckwerke, nämlich die Siebdruckschablonen, zum zu bedruckenden Objekt ausgerichtet wurden, wohingegen beim Ausführungsbeispiel gemäß den Fig. 11 - 13 die zu bedruckenden Objeke zum Druckwerk ausgerichtet werden. Abgesehen von diesem Unterschied besteht jedoch bezüglich der grundsätzlichen Handhabung Übereinstimung zwischen beiden Ausführungsformen. So kann eine Karte oder ein Kartenpaar zunächst in der Station II mit einem Einzeldruckbild versehen werden, welches in der Kontrollstation V erfaßt und mit der darin gespeicherten Soll-Position verglichen wird. Bei Abweichungen der Ist-Position von der Soll-Position wird zumindest einer der drei Stellmotoren jeder Ausrichtestation entsprechend betätigt. Falls zum Zwecke der Korrektur der Position und/oder der Winkelstellung der Karte die jeweilige Führungsschiene 130 bzw. 132 verstellt werden muß, reicht im Normalfall die Betätigung eines der beiden Stellmotoren 144, 146 aus, da im allgemeinen das Ausmaß der erforderlichen Verstellung so gering ist, daß die durch die Betätigung eines Stellmotors verursachte Verschwenkung der Führungsschiene im Bereich der elastischen Verformbarkeit der mit der Führungsschiene in Verbindung stehenden Elemente des anderen Stellmotores liegt.The main difference between the embodiment 11-14 and the embodiment according to FIGS. 1 - 10 is that in the latter the printing units, namely the screen printing stencils, aligned to the object to be printed were, whereas in the embodiment according to 11-13, the objects to be printed on the printing unit be aligned. Apart from this difference there is however, agreement regarding the basic handling between the two embodiments. So a card or one Pair of cards first in station II with a single print image be provided, which is recorded in the control station V. and compared with the target position stored therein. If the actual position deviates from the target position at least one of the three servomotors of each alignment station operated accordingly. If for the purpose of correcting the position and / or the angular position of the card Guide rail 130 or 132 must be adjusted is sufficient Normally the actuation of one of the two servomotors 144, 146, since in general the extent of the adjustment required is so small that the actuation of a Actuator caused pivoting of the guide rail in the Area of elastic deformability with the guide rail related elements of the other servomotor lies.

Eine besondere Ausrichtung der Karte 116 bezüglich ihrer Höhenlage ist nicht erforderlich, da aufgrund der V-förmigen Ausgestaltung der Führungsflächen an Führungsschiene und damit zusammenwirkendem Führungsfinger die Karte in jedem Fall im Tiefsten der V-förmigen Ausnehmung beider Teile gehalten wird. Der durch letztere bewirkte Formschluß zwischen Karte und Führung verhindert zudem, daß unter der Einwirkung der durch den Mitnehmer 166 bzw. 168 auf die leichte Karte ausgeübten Kräfte die Karte eine unkontrollierte Bewegung ausführen kann. Führungsschiene und damit zusammenwirkender Führungsfinger stellen eine Zwangsführung dar, die wirksam ist, bis die Karte vom Druckwerk, also den beiden Walzen 108, 110 erfaßt und aus der von Führungsschiene und Führungsfinger gebildeten Führung herausgezogen wird. Somit braucht der Mitnehmer 166, 168 in Transportrichtung 118 nur einen Hub auszuführen, der etwa der Hälfte der Länge der Karte 116 in Transportrichtung entspricht.A particular orientation of the card 116 with respect to it Elevation is not necessary because of the V-shaped Design of the guide surfaces on the guide rail and thus cooperating guide finger in any case in the card Deepest of the V-shaped recess of both parts is held. The positive connection between card and guide caused by the latter also prevents under the influence of the Driver 166 or 168 forces exerted on the light card the card can make an uncontrolled movement. Guide rail and cooperating leadership fingers is a forced operation, which is effective until the card from Printing unit, ie the two rollers 108, 110 detected and from the guidance formed by the guide rail and guide finger is pulled out. The driver therefore needs 166, 168 in Transport direction 118 to perform only one stroke, which is about the Half of the length of the card 116 corresponds to the transport direction.

Es kann zweckmäßig sein, die Grundeinstellung des Druckwerkes so zu wählen, daß die Anordnung des Druckbildes auf dem Drucktuch 112 des Druckzylinders 108 eine geringfügige Schrägstellung der Führungsschiene 130 bzw. 132 erfordert derart, daß der Abstand der Führungsschiene in horizontaler Ebene von der Mittelachse der Transportbahn 104 bzw. 106 in Transportrichtung 118 etwas zunimmt. In der Darstellung gemäß Fig. 13 würde dies bedeuten, daß der Abstand zwischen den beiden Führungsschienen 130, 132 bzw. den Führungsflächen 134, 136 in Transportrichtung 118 etwas zunimmt. Auf diese Weise wird sichergestellt, daß nach Transport durch den jeweiligen Mitnehmer 166 bzw. 168 und dadurch erfolgter Ausrichtung die Karte 116 in jedem Fall ihre Lage beibehält, wenn sie durch die beiden Walzen 108, 110 des Druckwerkes aus der von Führungsschiene und Führungsfinger gebildeten Führung herausgezogen wird.It may be useful to set the basic setting of the printing unit to be chosen so that the arrangement of the printed image on the printing blanket 112 of the printing cylinder 108 is slightly inclined the guide rail 130 or 132 requires such that the distance of the guide rail in the horizontal plane from the Center axis of the transport track 104 or 106 in the transport direction 118 increases slightly. 13 would this means that the distance between the two guide rails 130, 132 or the guide surfaces 134, 136 in the transport direction 118 increases slightly. This ensures that after transportation by the respective carrier 166 or 168 and thereby the alignment of the card 116 in any case maintains its position when it is through the two Rollers 108, 110 of the printing unit from the guide rail and guide finger formed guide is pulled out.

Im übrigen gilt auch bei der Ausführungsform gemäß den Fig. 11 - 14, daß eine Überwachung auch während des laufenden Produktionsbetriebes möglich ist, wie dies bereits im Zusammenhang mit der Ausführungsform gemäß den Fig. 1 - 10 beschrieben wurde. Selbstverständlich ist es bei Vorhandensein von zwei Transportbahnen 104, 106 und somit beim gleichzeitigen Bedrukken von zwei Karten erforderlich, in der Überwachungsstation V für jede Transportbahn eine Kamera und nachgeschaltete Einrichtungen zur Durchführung des Vergleichs zwischen Ist-Position und Soll-Position vorzusehen, da die Ausrichtung der Karte vor dem Druckwerk jeder Transportbahn gesondert, also unabhängig von der jeweils anderen Transportbahn, erfolgt.Otherwise, the same applies to the embodiment according to FIG. 11 - 14 that monitoring even while production is running is possible, as is already related with the embodiment according to FIGS. 1-10 has been. Of course it is in the presence of two Transport tracks 104, 106 and thus with simultaneous printing of two cards required in the monitoring station V A camera and downstream equipment for each transport lane to carry out the comparison between the actual position and target position, because the orientation of the Card in front of the printing unit of each transport lane, so regardless of the other transport path.

Claims (14)

  1. A method of printing on individual self-supporting articles (14; 116) with at least two individual print images which are to be applied successively to the article by means of a respective printing mechanism and which supplement each other on the article to form a total print image, characterised in that for the purposes of checking the printing mechanisms (20, 21, 22, 23) firstly in the individual printing stations (II, III, IV, V) a respective article (14) is provided only with one individual print image and the individual print image of each article is detected by a camera system (58) and the representation of the actual position of the individual print image relative to the article (14; 116) bearing it is compared in a computer (62) to a stored representation of the reference position and in dependence on the result of the comparison in the event of a deviation of the actual position of the individual print image from the reference position thereof the position of the printing mechanism (20, 21, 22, 23) and/or the position of a following article (116) is altered for the printing operation in accordance with the result of the comparison and printing of articles (14) is effected with all individual print images required for producing the total print image after all printing mechanisms required for that purpose have been checked and if necessary adjusted.
  2. A method according to claim 1 characterised in that the reference print image is taken from an original (68) by way of a camera (70) and inputted into the memory of a computer (62).
  3. A method according to claim 1 characterised in that the reference print image is inputted in the form of digital data (76) into the memory of a computer (62).
  4. A method according to claim 1 characterised in that when the individual print image is applied to the article (14) by means of screen printing in the event of the actual position of the individual print image deviating from the reference position the position of the screen printing stencil (27) is correspondingly altered.
  5. A method according to claim 1 characterised in that when the individual print image is applied to the article (116) using a printing cylinder (108) in the event of the actual position of the individual print image deviating from the reference position the position of a following article (116) is correspondingly altered for carrying out the printing operation.
  6. A method according to claim 1 characterised in that after adjustment of the printing mechanism (20, 21, 22, 23) and/or the position of the following article (116) for adaptation of the actual position of the individual print image to the reference position thereof the operation of printing following articles is effected without further comparison between the actual position and the reference position.
  7. A method according to claim 1 characterised in that after initial setting of the position of the printing mechanisms (20, 21, 22, 23) and/or the position of a following article (116) for the printing procedure when printing upon further articles at least random check monitoring of the actual position of the total print image and corresponding comparison with the reference position of the individual print images is also effected.
  8. A method according to claim 1 characterised in that a change in the position of the printing mechanism (20, 21, 22, 23) and/or the position of a following article (116) for the printing procedure is effected only when the deviation detected as a result of the comparison exceeds a predetermined extent.
  9. Apparatus for carrying out the method according to claim 1 which has at least two printing stations (II - V), transport means (12) for transporting the articles through the printing stations and possibly further treatment stations, and at least one camera system (58) for detecting the individual article (14), and each printing mechanism is provided with an adjustably mounted screen printing stencil (27) and setting motors (39, 45, 71) for setting the screen printing stencil, which are controllable by a computer (62) connected to the camera system, characterised in that for the purposes of checking the printing mechanisms (20, 21, 22, 23) firstly in the individual printing stations (II - V) a respective article (14) is provided only with one individual print image and the individual print image of each article can be detected by the camera system (58) and the computer (62) is provided with a device for storing the reference position of each individual print image and a device for comparing the actual position of each individual print image to a reference position and the screen printing stencil (27) with which said individual print image had been produced is displaceable in dependence on the result of the comparison.
  10. Apparatus according to claim 9 characterised in that the device for adjusting the screen printing stencil (27) has three carriages (38, 44, 48) which are mounted displaceably relative to each other and of which two carriages (38, 44) are arranged linearly movably at a right angle relative to each other and the third carriage (48) is displaceable along a curved guide path, and one of the carriages (38) is displaceably mounted on the machine frame (10) and the other two carriages (44, 48) are each carried by a respective carriage (38, 44) and the setting motors (39, 45, 51) are respectively arranged between the frame (10) and one (38) of the carriages and between one of the carriages (38, 44) and another carriage carried by the latter one.
  11. Apparatus for carrying out the method according to claim 1 which has at least two printing stations (I - IV), transport means (120, 122) for transporting the articles through the printing stations and possibly further treatment stations and at least one camera system and the printing mechanism is provided with a printing cylinder (108) with which at least one plate cylinder (114) is associated, and an impression cylinder (110) and arranged in the transport direction (118) upstream of the printing station is a device for aligning the article to be printed, characterised in that the aligning station is provided with a guide surface (160) laterally defining the path of movement of the article, for one side of the article, and provided at a spacing from said guide surface (160), which spacing substantially corresponds to the extent of the article (116) transversely to the transport direction (118), is a movable guide abutment (152, 154) which is elastically urged towards the article disposed between it and the guide surface (160) and associated with the guide surface by means of which the article is aligned substantially transversely with respect to its transport direction is at least one setting motor (144, 146) by which the guide surface is pivotable and/or displaceable substantially parallel to the plane of transport movement of the article and transport of the article from the aligning device into the printing station is effected by an entrainment member (166, 168) which for the purposes of positioning in the transport direction (118) is carried with the interposition of a setting motor (180) and the setting motors (144, 146, 180) for setting the guide surface (160) and/or the entrainment member (166, 168) are controllable by a computer which is connected to the camera system and the setting motors are displaceable in dependence on the comparison of the actual position of the individual print image with the reference position thereof.
  12. Apparatus according to claim 11 characterised in that two setting motors (144, 146) are associated with the guide surface.
  13. Apparatus according to claim 11 characterised in that the guide surface (160) is carried by a guide rail (130, 132) which at its side towards the article (116) is delimited in a V-shape in cross-section and the side of the guide abutment (152, 154) which is towards the guide surface (160) is also delimited in a V-shape in cross-section in such a way that the edges of the article which are substantially parallel to the transport direction are guided by the deepest region of the two V-shaped surfaces.
  14. Apparatus according to claim 11 characterised in that the individual print image to be transferred onto the article (116) is oriented on the printing cylinder (108) in such a way that the guide surface (160) forms a small angle for the purposes of suitable alignment of the article with the transport direction (118) in such a way that in the transport direction of the article the guide surface (160) increasingly moves away from a straight line defining the transport direction.
EP97103616A 1996-04-15 1997-03-05 Method and apparatus for printing individual self-supporting objects Expired - Lifetime EP0802054B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19614740 1996-04-15
DE19614740A DE19614740A1 (en) 1996-04-15 1996-04-15 Method and device for printing self-supporting individual objects

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EP0802054A2 EP0802054A2 (en) 1997-10-22
EP0802054A3 EP0802054A3 (en) 1998-03-11
EP0802054B1 true EP0802054B1 (en) 2001-05-16

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EP (1) EP0802054B1 (en)
CN (1) CN1112289C (en)
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Also Published As

Publication number Publication date
EP0802054A2 (en) 1997-10-22
EP0802054A3 (en) 1998-03-11
DE19614740A1 (en) 1997-10-16
DE59703532D1 (en) 2001-06-21
CN1112289C (en) 2003-06-25
CN1168319A (en) 1997-12-24
US5899143A (en) 1999-05-04

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