EP0784808B1 - Druckeinrichtung zum front- und rückseitigen bedrucken eines bandförmigen aufzeichnungsträgers - Google Patents
Druckeinrichtung zum front- und rückseitigen bedrucken eines bandförmigen aufzeichnungsträgers Download PDFInfo
- Publication number
- EP0784808B1 EP0784808B1 EP95933306A EP95933306A EP0784808B1 EP 0784808 B1 EP0784808 B1 EP 0784808B1 EP 95933306 A EP95933306 A EP 95933306A EP 95933306 A EP95933306 A EP 95933306A EP 0784808 B1 EP0784808 B1 EP 0784808B1
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- EP
- European Patent Office
- Prior art keywords
- recording medium
- printing
- channel
- paper
- rollers
- 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.)
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6517—Apparatus for continuous web copy material of plain paper, e.g. supply rolls; Roll holders therefor
- G03G15/6526—Computer form folded [CFF] continuous web, e.g. having sprocket holes or perforations
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/23—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 specially adapted for copying both sides of an original or for copying on both sides of a recording or image-receiving material
- G03G15/231—Arrangements for copying on both sides of a recording or image-receiving material
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/23—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 specially adapted for copying both sides of an original or for copying on both sides of a recording or image-receiving material
- G03G15/231—Arrangements for copying on both sides of a recording or image-receiving material
- G03G15/232—Arrangements for copying on both sides of a recording or image-receiving material using a single reusable electrographic recording member
- G03G15/234—Arrangements for copying on both sides of a recording or image-receiving material using a single reusable electrographic recording member by inverting and refeeding the image receiving material with an image on one face to the recording member to transfer a second image on its second face, e.g. by using a duplex tray; Details of duplex trays or inverters
- G03G15/237—Arrangements for copying on both sides of a recording or image-receiving material using a single reusable electrographic recording member by inverting and refeeding the image receiving material with an image on one face to the recording member to transfer a second image on its second face, e.g. by using a duplex tray; Details of duplex trays or inverters the image receiving member being in form of a continuous web
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
- G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
- G03G2215/00417—Post-fixing device
- G03G2215/0043—Refeeding path
- G03G2215/00438—Inverter of refeeding path
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
- G03G2215/00443—Copy medium
- G03G2215/00451—Paper
- G03G2215/00455—Continuous web, i.e. roll
- G03G2215/00459—Fan fold, e.g. CFF, normally perforated
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
- G03G2215/00535—Stable handling of copy medium
- G03G2215/00556—Control of copy medium feeding
- G03G2215/00586—Control of copy medium feeding duplex mode
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
- G03G2215/00919—Special copy medium handling apparatus
- G03G2215/00924—Special copy medium handling apparatus two or more parallel feed paths
Definitions
- the invention relates to a printing device for optional on and double-sided printing of a tape-shaped recording medium with turning device arranged therein with associated Feeding device.
- EP-B1-01 54 695 For the production of multi-color and reverse side printing with continuous paper working electrographic pressure equipment it is out EP-B1-01 54 695 known, two continuous paper printers in a row to operate, the one printed in the first printer Paper turned over and then in the second printer on the second side is printed.
- a printing device for the front printing on the back of a tape-shaped recording medium proposed an associated intermediate carrier Aggregates producing toner images, one the toner images transfer station transferring to the recording medium and contains a fuser, each with a usable width of at least twice the bandwidth of the record carrier to have.
- the recording medium is transferred via a feedback channel after printing the front of the fuser led to a turning station in which he turned and fed to the transfer station again for printing on the back becomes.
- pages 201-203 are methods for duplex printing with a tape-shaped recording medium with differently structured electrophotographic Printing devices described.
- a first duplex printing process first on a front side a toner image is applied to the recording medium and then the recording medium and the toner image are turned over and simultaneously, or immediately before turning the toner image by an attached in the area of the turning device first fixing device fixed.
- Transfer station applied a back toner image, which then again with the help of an output side to the printing device attached further fixing device is fixed.
- the second method of producing duplex printing is first with the help of the transfer printing station a front toner image upset. Then the record carrier is turned over and the rear toner image is applied. Over a fusing station on the output side are both Toner images fixed at the same time.
- a third procedure for creating simplex printing on a narrow or double width The record carrier is the only one Toner image with an appropriately wide transfer printing station, then the toner image via an output side width-adjusted fuser is fixed.
- the paper web In the event of a print stop, the paper web must be stopped on the right side of the paper transport and restarted on the right side when starting the print. Since a delay line is required for each paper web stop and an acceleration line is required for each paper web start, after a stop operation the paper web must be pulled back so far in front of the transfer location that it can be accelerated when restarting and synchronized for transfer printing.
- the paper transport rollers of the return channel support the withdrawal movement of the paper transport, so that this paper withdrawal can be carried out with the paper web relaxed, if possible. Without this retraction relief, the paper transport perforation would be overloaded or the transport perforations expanded too much, which would lead to print image positioning errors after the restart.
- the tension roller forces must be designed for the printing operation so that a safe removal of the paper web is guaranteed from the fusing station.
- the pulling roller forces must not be so great that they act through the fixing gap between the pressure roller and the fixing roller and thus adversely affect the paper flow in the fixing station.
- the pulling rollers of the reverse side web pull the paper out of the stacker unit or out of a post-processing loop.
- the traction rollers of the front side web must pull the paper web back through the duplex return and the paper web turner. The resistance is so great that this can lead to paper tear during paper withdrawal.
- the aim of the invention is therefore to provide a printing device front and back printing of a tape-shaped recording medium with a turning device with associated
- the safe threading of the record carrier enables.
- Another object of the invention is the printing device To be designed so that the record carrier is not damaged printing was interrupted and resumed can be.
- An electrographic printing device for printing on ribbon-shaped Record carriers 10 of different bandwidth contains an intermediate motor 11 driven by an electric motor Photoconductor drum. Instead of the photoconductor drum however, a band-shaped intermediate carrier, e.g. a Use OPC tape or a magneto-styli arrangement like this e.g. is described in EP-B1-0 191 521. To the intermediate carrier 11 the various units are grouped together for the electrophotographic process.
- a band-shaped intermediate carrier e.g. a Use OPC tape or a magneto-styli arrangement like this e.g. is described in EP-B1-0 191 521.
- a charging device 12 in the form of a charging corotron for Charging the intermediate carrier 11; a character generator 13 with a light emitting diode comb for character dependent exposure of the Intermediate carrier 11, which extends over the entire usable width of the intermediate beam 11 extends; a developer station 14 for coloring the character-dependent charge image on the Intermediate carrier 11 with the aid of a one- or two-component developer mixture; a transfer station 15, which is about the width of the intermediate carrier 11 and with which the Toner images are transferred to the recording medium 10.
- Transfer cleaning station 16 is provided, with therein Integrated cleaning brush with associated suction device and an unloading device 17.
- the intermediate carrier 11 is driven by an electric motor and in printing mode Arrow direction is moving.
- the printing device also contains one of the transfer printing station 15 downstream in the transport direction of the recording medium Fuser 18, which is used as a thermal printing fuser is formed with a heated fixing roller 19 associated pressure roller 20, and one of the fixing station downstream feeder 21 with guide rollers for Feeding of the recording medium 10 to an internal one Stacking device 22/1 or to one outside the printing device arranged external stack or other post-processing device 22/2.
- Fusing stations are also other fusing stations, e.g. With a heated or unheated inlet saddle or a Cold fixing station possible.
- the tape-shaped record carrier 10 is e.g.
- the recording medium is preferably transported via a transport device assigned to the transfer station 15 25 in the form of conveyor belts provided with pins 26, which are guided via drive shafts 27 into the edge perforations of the record carrier 10 intervene.
- a transport device assigned to the transfer station 15 25 in the form of conveyor belts provided with pins 26, which are guided via drive shafts 27 into the edge perforations of the record carrier 10 intervene.
- a hole without a recording medium is used is a correspondingly adapted transport device to be provided which e.g. by Friction, controlled by a synchronization mark scanning Tax arrangement, transported.
- Housing area of the printing device in a receiving area a turning device for the internal stack 23/1 28 arranged, their structure and function later is explained and about the printing on the back of the Record carriers already printed on the front turned and the transfer printing station 15 is fed again.
- the turning device 28 projects with the fixing station 18 a return channel 29 in connection.
- the printing device is controlled by a printer controller, which is shown schematically here, with a central unit CPU, a page memory SP, which is page dependent is divided into memory areas, and a data control unit DC. All control units are one BUS system with each other and with the units of the printing device connected.
- the electrographic printing device is for printing on Suitable recording media with different bandwidth.
- the intermediate carrier 11 (Photoconductor drum) has a usable width that is the largest possible Corresponds to the recording medium width (e.g. one wide recording medium with a width corresponding to that A3 format, landscape). This width is twice that A4 bandwidth. This makes it possible in the area of Transfer station 15 two narrower recording medium webs in Arrange A4 format side by side.
- the fuser 18 and the other electrophotographic units, such as Developer station 14, character generator 13, cleaning station 16 are designed according to this usable width.
- the transport device 25 can record media widths be designed adjustable in width. This can e.g. thereby be achieved that the drive wheels that the in the edge perforations of the recording media engaging conveyor belts Wear (pimples), movable on polygonal shafts are stored.
- the return channel 29 for narrow record carriers has turning device 28 coupled to the fixing station 18 Two tasks: On the one hand, it serves for lateral displacement the record carrier web, so that a parallel guidance in Area of the transfer station 15 is possible, and on the other hand for rotating the record carrier from the front to the back. she can be configured to be switchable depending on the operating mode.
- the printing device enables without change the most varied of the hardware structure Operating modes:
- the narrow e.g. A4 wide recording media 10 starting from the storage area 23 via the feed rollers 24 fed to the transfer printing station 15 and in a partial transfer printing area El at its top with a front toner image printed.
- the front of the record carrier 10 is characterized by solid transport arrows, the back by dashed transport arrows. Then it will be the record carrier with the loose, electrostatically adhesive Front toner image of the fuser 18 supplied and the front toner image fixed there. After that is done a further transport of the record carrier via the return channel 29 to the turning device 28, the deflection contour is positioned in a turning position.
- the record carrier becomes 180 ° with respect to it Front and back turned and over the feed rollers 24th the transfer printing device 15 again fed so that its Back in partial transfer area E2 with a back toner image can be provided. Then the record carrier again supplied to the fixing station 18 and that The back toner image is fixed and then the one on both sides printed record carriers in the stacking device 22/1 filed or for paper post-processing in a cutter 22/2 or the like issued.
- the page memory SP contains memory areas VS for storing the front side image data and storage areas RS for storing the back image data.
- the Data preparation takes place via the data control device DC, the data starting from a data source (HOST), e.g. an external data storage device via an interface are supplied to the data control device DC.
- HOST data source
- the Data of the individual pages to be printed are stored in the Page memory SP stored separately to the front VS and rear RS in the corresponding memory areas.
- the retrieval of the data is then time-controlled, so that the desired front-back assignment of the toner images is reached on the record carrier.
- Such a wide recording medium enables e.g. the Printing with DIN A3 horizontally arranged toner images or else with two A4 toner images arranged side by side.
- the turning device 28 (FIG. 4) essentially contains four deflection elements arranged in the manner of the letter W, over which the narrow record carrier 10 starting from a paper inlet channel coupled to the return channel 29 (FIG. 1) 30 passed to a paper outlet channel 31 , which in turn the recording medium 10 the feed rollers 24 ( Figure 2) feeds. Paper inlet channel 30 and paper outlet channel 31 are side by side on one level arranged.
- the paper feed channel 30 via the return channel 29 supplied recording medium 10 is first via a Record carrier laterally deflecting the first oblique deflection device 32 led.
- This consists of an approximately 45 ° to Direction of paper arranged hollow deflecting rod 33 or Roller.
- the first oblique deflection device 32 in the paper transport direction a first reversing device 34 is arranged downstream with a deflection element 35 in the form of a hollow profile Return of the recording medium 10 behind the paper channels to the area of approximately parallel to the first Reversing device 34 arranged, the recording medium 10th again reversing second reversing device 36. This points likewise a deflection element 35 in the form of a hollow profile.
- Downstream of the second reversing device 36 is a Record carrier 10 deflecting into the paper outlet channel 31 second inclined deflection device 37 with an approximately 45 ° Direction of paper arranged hollow deflecting rod 33 or Roller.
- Deflection rods 33 and deflection elements 35 have deflection surfaces 38 ( Figures 6, 7) wear-resistant polished surfaces on that as sliding surfaces for the recording medium 10th serve and the in a deflection channel 39 forming distance are surrounded by guide surfaces 40.
- the the deflecting rods 33 associated with the oblique deflection devices 32 and 37 Guide surfaces 40 are part of a pivotable arrangement Flaps 41 made of hollow profiles. They are in Figure 4 in Operating position (solid line) and in the swivel position (dashed lines).
- the guide surfaces 40 the deflecting elements 35 consist of spring plates 42, which front and rear, hinged housing flaps 43 the Turning device are arranged.
- the housing flaps 43 are in Figure 5 in the swiveled position with broken lines shown.
- the cavities of deflecting rods 33 and deflecting elements 35 are connected to each other and serve as air supply ducts.
- One in the receiving area for the turning device arranged in the device connector assembly 45 is with the right-hand deflection element 35 for controlled feeding Blown air can be coupled via a fan 56. It also contains a plug 45/1 for the electrical connection. This The plug can contain a switch, via which the correct one Connection of the turning device and thus its presence sampled and sent to the device control DC in the form of electrical Signals is reported.
- the turning device also contains a threading device for the record carrier 10 with one around the reversing devices 34, 36 guided motor-driven gripping element, the gripping means for the beginning of the recording medium has, wherein for threading into the turning device Record carrier start in the area of the first inclined deflection device 32 detected and via the reversing devices 34, 36th and the second inclined deflection device 37 into the area of the paper outlet channel 31 is transported.
- the gripping element is in the illustrated embodiment from a perforated conveyor belt 46, the via guide axes 47 around the reversing devices 34, 36 is led. It is driven by a motor 48.
- a friction lining 49 (Friction element) made of foam or silicone. Its length is such that in that shown in Figure 4 Operating state of the turning device, in which the friction element 49 between the oblique deflection devices 32, 37, the friction element 49 is disengaged with the record carrier 10.
- a recording medium circulation channel runs around the reversing devices 34, 36 50 with associated switches 51 for Einund Rejection of the record carrier 10 in the area of Inclined deflection devices 32, 37.
- the conveyor belt 46 is immersed in the between the Reversing devices 34, 36 lying channel sections of the Recording medium circulation channel and is carried there.
- the channel walls facing the friction lining 49 face in the area of the conveyor belt 46 roller elements 52 ( Figure 4) for reduction the friction between the recording medium 10 and the wall surface on. Between the roller elements 52 and the friction lining 49, the record carrier 10 is clamped in and through the friction lining 49 transported safely.
- the conveyor belt is in the area of the reversing devices 34, 36 46 led over a transport route ( Figure 8), the outside of the deflection channel 39 as part of the recording medium circulation channel 50 runs and which is longer than the transport route the beginning of the recording medium through the deflection channel 39.
- the position changes prematurely of the record carrier 10 relative to the friction lining 49 at Circulation around the reversing devices 34, 36. It is thus possible at the end of the threading process the beginning of the recording medium over the rear end of the friction lining 49 far into the paper outlet channel 31 to push where it from paper transport elements 53 is detected.
- These paper transport elements 53 can from swiveling friction wheels or impact elements or Tractors with transport slats exist.
- the turning device is controlled by a microprocessor Threading control arrangement, which is part of the device control Can be DC. It contains a central control a microprocessor. This is on the input side with a optical sensor S2 in connection, which is below the first Inclined deflection device 32 is arranged and the beginning of the recording medium in the area of the first inclined deflection device 32 scans as well as with one in the area of the first Reversing device 34 arranged sensor S1, which acts as a Hall sensor can be formed and the position of the friction element 49 (friction lining) scanned via a magnetic element.
- a microprocessor Threading control arrangement which is part of the device control Can be DC. It contains a central control a microprocessor. This is on the input side with a optical sensor S2 in connection, which is below the first Inclined deflection device 32 is arranged and the beginning of the recording medium in the area of the first inclined deflection device 32 scans as well as with one in the area of the first Reversing device 34 arranged sensor S1,
- the Threading control arrangement is on the output side with the blower to generate the blown air 56, the drives for the paper transport elements 53 and the paper transport rollers 54 and the Conveyor belt drive 48 coupled.
- the threading control arrangement detects the beginning of the recording medium via the sensor S2 for threading in the area of the first inclined deflection device 32, depending on this activates the conveyor belt drive 48 and positioned depending on the position signal of sensor S1 after threading the beginning of the recording medium up to the paper outlet channel 31 the friction lining 49 in a rest position in which he is out of engagement with the Record carrier 10 is located.
- the turning device is an independent torsion-resistant Unit formed in the form of a module and in the device in the receiving area 23 for the internal supply stack 23/1 withdrawable mounted on telescopic rails 55 ( Figures 9, 10). This means that there are paper flow disruptions and servicing all deflection elements freely accessible.
- the blower 56 for generating the blown air the drives for the paper transport members 53 and the paper transport rollers 54 activated.
- the friction lining 49 is in the Figure 4 shown rest position between the oblique deflection elements 32, 37.
- the via the paper inlet channel 30 incoming band start is the first in the deflection channel 39 Inclined deflection device 32 deflected and via the sensor S2 recognized.
- the conveyor belt 46 is started. It detects the beginning of the tape via the friction lining 49 and transports it him around the first reversing device 34. The beginning of the recording medium hurries something to the friction lining 49.
- a return device is arranged in the return duct 29 ( Figure 12), which serves the record carrier after printing on the front side from the fixing station 18 to lead to the turning device 28.
- the feedback device contains a pair of motor-driven pull rollers on the input side 57 with a motor-driven transport roller 58 and one can be swiveled in and out via a lever 59 Pinch roller 60, still a pair of output rollers 61 with a motor-driven transport roller 62 and one mounted on a pivoting lever 63 which can be pivoted on and off Pinch roller 64.
- the channel width is dimensioned such that the recording medium buckles is largely prevented in the channel. To this purpose, it has a clear width of no greater than 15 mm on. This ensures that while pushing through the beginning of the recording medium through the connecting channel 65 the record carrier does not buckle. Because the route between the pair of input rollers 57 on the input side and the pair on the output side Pull roller pair 61 can be so large that despite of the narrow connecting channel when using very light papers with e.g.
- the pivot lever 63 can be pivoted about an axis of rotation 69 with the help of a servomotor 70, which is connected to an attachment 72 via cams 71 with compression spring element 76 arranged therein on lever 63 attacks.
- the pivot lever 59 of the pressure roller 60 of the input side pair of traction rollers 57 is with a servomotor 73 coupled with a cam 74 on a shoulder 75 with Associated compression spring 76 acts on the lever 59.
- the e.g. Transport rollers made of rubber or silicone 58, 67 and 62 are via belts 77 with a central drive motor 78 coupled.
- the pair of traction rollers 57 has a centering device in the form of a centering funnel 79. However, it can also Guide plates or the like can be used.
- the record carriers 10, 10/1, 10/2, 10/3 can also be made of pre-folded continuous paper, where the form fold distances have different lengths.
- This Folds increase the risk of buckling when pushing within the connecting channel 65, since the paper web hardly any buckling stability in the folded area having.
- the distance between two pairs of pull rollers, e.g. the Pull roller pairs 57 and 66 or 66 and 61 should therefore minimum fold spacing length of the pre-folded used Do not fall below record carrier 10.
- For continuous paper printers are pre-folded record carriers with a minimum fold spacing of, for example, 152.4 mm (6 inches) is known.
- the pressure force of the pressure rollers 60, 64 and 68 of the pairs of pull rollers depends on the position of the cams 71 and 74 changeable. This changes the Frictional force on the between the transport roller and pressure roller located recording medium 10th
- the feeder is in the form of an independent unit an interchangeable feedback module.
- the pull rollers 57, 56 and 61 together with the associated connecting channel 65 between carriers 82 of a module housing 83 attached.
- the module housing 83 in turn is over corresponding Guide elements suspended in telescopic rails 84, in a recording area for the module below the Fixing station 18 are attached ( Figure 13).
- the return module can slide rails 84 out of the receiving area can be pulled and exchanged or removed.
- the Feedback device is also assigned a centering device, around the feedback module when inserted center in the working position ( Figure 14).
- the centering device exists in the illustrated embodiment from two centering guides 85 attached to the printer frame, into the centering pins 86 fastened to the module housing 83 intervention.
- the centering devices can be designed in this way be that by coupling the centering pins to the centering guides at the same time the electrical connections for the central drive motor and other electrical components getting closed. However, it can also be separate Plug connections 86/1 ( Figure 13) are available. This The plug can contain a switch, via which the correct one Connection of the centering device and thus its presence sampled and sent to the device controller DC in the form of electrical signals is reported.
- the below the receiving area for the feedback module arranged internal stacking device 22/1 has an in Depending on the stack height, the feeding device can be moved 21 on.
- the feed device 21 contains a centering funnel 87 and a pair of traction rollers from a motor driven transport roller 88 with associated pressure roller 89.
- the feed device 21, which is in the upper part of the stacker Stacker 22/1 is integrated, can be lifted via chains 90 and be lowered. This makes it possible to insert the Return module the feed device 21 with the feed roller pair to position in the area of the output channel 81 and if there is no print module in the recording medium exit area the fixing station 18.
- the turning station In order to start the recording medium in duplex mode Being able to automatically thread the turning station is at inserted return module the beginning of the recording medium via the centering funnel 79 to the feed roller pair 57 fed.
- the pinch rollers of the pair of feed rollers on the input side 57, the middle feed roller pair 66 and the output-side feed roller pair 61 are pivoted.
- the Feed roller pair 57 detects the beginning of the recording medium and transports it with the support of the central feed roller pair 66 and the pair of feed rollers 61 on the output side to the paper inlet channel 30 of the turning device 28, where it is detected by the transport elements arranged there and is threaded through the turning device 28.
- the friction force is dimensioned by rotating the cams 74 so that the record carrier in the area of the fuser does not tear off.
- After threading through the turning device 28 is the beginning of the recording medium by the transfer printing station pushed and at the same time printed on the back. It then passes through the paper outlet channel 29 Fixing station 18 in a next to the return channel 29th arranged output channel 91 through the feedback module in the area of the feed device 21 of the internal stacking device and is grasped by it.
- the pinch rollers 64 and 68 of the feed rollers of the center feed roller pair 66 and the output side Feed roller pair 61 pivoted so that only the driving force of the input-side feed roller pair 57 acts.
- the withdrawal roller forces are designed for printing so that safe removal the paper web is guaranteed from the fuser.
- the pull roller forces must not be too great that them through the fixing gap between the pressure and fixing rollers act and thus the paper run in the fuser disadvantage affect.
- the baffle 80 By Swiveling the baffle 80 opens a bushing with associated output channel 81 through the feedback module and the record carrier (s) 10/1, 10/2, 10/3 can through the feedback module through the feeder 21 are supplied.
- the movement of the baffle 80 makes sense with the movement of the pinch roller 60 coupled. The movement can be carried out manually can be done by the printer operator, it can also be done automatically done motor by the servomotor 73. So that must when switching from duplex mode to simplex mode or conversely, the feedback module is not removed each time will.
- the turning device arranged in the internal storage area 23/1 28 limits the available storage area to hold a stack of supplies with regard to the usable format height (distance between folds of the prefolded Continuous paper).
- the receiving surface 23 of the internal The storage area is designed so that when removed Turning device 28 a supply stack with the largest possible Print width and large format height can accommodate. Becomes So the printing device operated in simplex mode a wide recording medium 10/3 with a large format height, e.g. 355.6 mm (14 inches), it is necessary to turn the turning device 28 out to remove the storage area. In simplex mode narrow or with two parallel recording media can the turning device 28 in the storage area remain, if not a very large format height at the same time to be printed. With format heights of more than approximately 304.8 mm (12 inches) the turning device must be removed.
- the electronic device control DC detects the printer by evaluating the sensor signals via a monitoring device, for example in the form of an OR operation can be automatically the presence or absence the unit feed device (duplex return) and Turning unit.
- a monitoring device for example in the form of an OR operation can be automatically the presence or absence the unit feed device (duplex return) and Turning unit.
- the device control DC Printing device can be determined independently that at removed duplex return the maximum to be processed Paper stack height in the output tray of the printer again by Height of the duplex return and with the turning unit removed the maximum paper size to be processed in the input tray of the printer again by the width of the turning unit can be enlarged. This can be done on a control panel display 92 on the printer module ( Figure 10) in the form of an alpha-numeric Message.
- duplex return or Turning unit Whenever one of the two units duplex return or Turning unit is removed from the printer, switches the electronic device control DC fully automatic all device functions to simplex operation and electronic device control DC outputs fully automatically via the control panel display 92 on the printer module error messages if from Printer operator is trying to use duplex functions to access.
- the described exemplary embodiment of the multifunctional printing device contains a turning module with an automatic threading device.
- a turning module with a structure corresponding to the schematic representations of FIGS. 1 to 3, in which the record carrier is possibly threaded through by hand.
- this is an embodiment which does not belong to the present invention.
- the turning module can be replaced for this operating mode. This also applies to the feed module.
- electrostatic printing device is also intended Include printing or copying equipment that is magnetographic or electrostatic recording methods.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Counters In Electrophotography And Two-Sided Copying (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Description
Da bei jedem Papierbahnstopp eine Verzögerungsstrecke und bei jedem Papierbahnstart eine Beschleunigungsstrecke erforderlich sind, muß nach einem Stoppvorgang die Papierbahn wieder so weit vor die Umdruckstelle zurückgezogen werden, daß diese bei einem Wiederstart beschleunigt und für den Umdruck synchronisiert werden kann.
Die Papiertransportrollen des Rückführungskanals unterstützen die Rückzugsbewegung des Papiertransportes, damit dieser Papierrückzug möglichst bei entspannter Papierbahn durchgeführt werden kann. Eine Überlastung der Papiertransportlochung bzw. ein zu starkes Ausweiten der Transportlochungen, was zu Druckbildpositionierungsfehlern nach dem Wiederstart führt, wäre ohne diese Rückzugsentlastung die Folge. Die Zugrollenkräfte müssen für den Druckbetrieb so ausgelegt sein, daß ein sicherer Abtransport der Papierbahn aus der Fixierstation gewährleistet ist. Außerdem dürfen die Zugrollenkräfte nicht so groß sein, daß sie durch den Fixierspalt zwischen Andruck- und Fixierwalze wirken und damit den Papierlauf in der Fixierstation nachteilig beeinträchtigen. Beim Rücktransport nach einem Papierstopp ziehen die Zugrollen der Rückseitenbahn das Papier lastlos aus der Staplereinheit oder aus einer Nachverarbeitungsschlaufe. Die Zugrollen der Vorderseitenbahn müssen jedoch die Papierbahn durch die Duplex-Rückführung und den Papierbahn-Wender zurückziehen. Der Widerstand ist dadurch so groß, daß dies bis zum Papierriß während des Papierrückzuges führen kann.
Dieses ist allerdings ein Ausführungsbeispiel, welches nicht zu der vorliegenden Erfindung gehört.
Bei der Verwendung eines Aufzeichnungsträgers mit Eigenschaften (Papiergewicht, Struktur etc.) die ein automatisches Durchfädeln nicht zulassen, kann für diese Betriebsart das Wendemodul ausgetauscht werden. Dies gilt auch für das Zuführmodul.
Claims (10)
- Druckeinrichtung zum wahlweise ein- oder doppelseitigen Bedrucken eines bandförmigen Aufzeichnungsträgers (10), die einen Zwischenträger (11) mit zugehörigen Tonerbilder erzeugenden Aggregaten (12, 13, 14, 16), eine die Tonerbilder auf die Aufzeichnungsträger (10) übertragende Umdruckstation (15) und eine Fixierstation (18) enthält, die jeweils eine nutzbare Breite von mindestens der doppelten Bandbreite eines doppelseitig zu bedruckenden Aufzeichnungsträgers (10) haben, sowie
einen Rückführkanal (29) um den doppelseitig zu bedruckenden Aufzeichnungsträger nach dem Bedrucken der Vorderseite von der Fixierstation (18) zu einer Wendeeinrichtung (28) zu führen, in der er gewendet und zum Bedrucken der Rückseite erneut der Umdruckstation (15) zugeführt wird, dadurch gekennzeichnet, daß der Rückführkanal (29) aufweist:ein eingangsseitiges motorisch angetriebenes Zugrollenpaar (57) mit einer vorgelagerten Zentriereinrichtung (79) um den Aufzeichnungsträgeranfang diesem Zugrollenpaar (57) zuzuführen, undein ausgangsseitiges motorisch angetriebenes Zugrollenpaar (61) mit einer Transportrolle (62) und einer Andruckrolle (64), die relativ zueinander verschwenkbar gelagert sind undeinem zwischen den Zugrollenpaaren (57, 61) angeordneten Verbindungskanal (65), dessen Kanalweite so bemessen ist, daß ein Ausknicken des Aufzeichnungsträgers (10) weitgehend verhindert wird. - Druckeinrichtung nach Anspruch 1, wo der Verbindungskanal (65) eine Länge, die kürzer ist als der Falzabstand eines zu bedruckenden, vorgefalteten Aufzeichnungsträgers (10), hat.
- Druckeinrichtung nach einem der Ansprüche 1 oder 2 mit mindestens einem zusätzlichen im Verbindungskanal (65) angeordneten motorisch angetriebenen Zugrollenpaar (66), mit einer Transportrolle (67) und einer Andruckrolle (68), die relativ zueinander verschwenkbar gelagert sind.
- Druckeinrichtung nach einem der Ansprüche 1 bis 3 mit einer mindestens dem eingangsseitigen Zugrollenpaar (57) zugeordneten Einrichtung (73, 74) zum Einstellen der Friktionskraft auf den Aufzeichnungsträger (10).
- Druckeinrichtung nach Anspruch 4, wo eins der Zugrollenpaare (57, 61) eine Transportrolle (62, 58) und eine relativ zur Transportrolle beweglich gelagerte Andruckrolle (60, 64) und eine an der Andruckrolle (60, 64) angreifenden Nocken (74, 71) zur Veränderung der Andruckkraft hat.
- Druckeinrichtung nach einem der Ansprüche 1 bis 5 mit einem zentralen Antrieb (78) für die Zugrollenpaare (57, 61, 66).
- Druckeinrichtung nach einem der Ansprüche 1 bis 6, wo das eingangsseitige Zugrollenpaar (57) eine Transportrolle (58) und eine Andruckrolle (60) hat, die relativ zueinander verschwenkbar gelagert sind, so daß sich im geöffneten Verschwenkzustand zwischen den Rollen ein Durchgangskanal für den Aufzeichnungsträger bildet, undmit einer dem eingangsseitigen Zugrollenpaar (57) in Aufzeichnungsträgertransportrichtung nachgeordneten Weiche (80) mit einer ersten Betriebsstellung in der der Aufzeichnungsträger (10) zum Bedrucken der Rückseite in den Verbindungskanal (65) geleitet wird undmit einer zweiten Betriebsstellung, in der ein nur frontseitig bedruckter Aufzeichnungsträger (10/3, 10/1, 10/2) in einen Ausgabekanal (81) geleitet wird.
- Druckeinrichtung nach Anspruch 7 mit einer Stapeleinrichtung (22/1) für den Aufzeichnungsträger, die eine mindestens bis in den Bereich des Ausgabekanals (81) höhenverschiebliche Zuführeinrichtung (21) aufweist.
- Druckeinrichtung nach einem der Ansprüche 1 bis 8, wo die Wendeeinrichtung (28) eine automatische Einfädeleinrichtung für den Aufzeichnungsträger (10) aufweist.
- Druckeinrichtung nach Anspruch 9, wo die Wendeeinrichtung (28) miteinem Papiereinlaufkanal (30) und einem Papierauslaufkanal (31), die nebeneinander angeordnet sind;einer den über den Papiereinlaufkanal (30) zugeführten Aufzeichnungsträger (10) seitlich umlenkenden ersten Schrägumlenkvorrichtung (32);einer der ersten Schrägumlenkvorrichtung (32) in Papiertransportrichtung nachgeordneten ersten Umkehreinrichtung (34) zur Rückführung des Aufzeichnungsträgers (10) hinter den Papierkanälen bis in den Bereich einer etwa parallel zur ersten Umkehreinrichtung (34) angeordneten, den Aufzeichnungsträger (10) erneut umkehrenden zweiten Umkehreinrichtung (36);einer der zweiten Umkehreinrichtung (36) nachgeordneten, den Aufzeichnungsträger (10) in den Papierauslaufkanal (31) umlenkenden zweiten Schrägumlenkvorrichtung (37) undeiner Einfädeleinrichtung für den Aufzeichnungsträger (10) mit einem um die Umkehreinrichtungen (34, 36) geführten motorisch angetriebenen Greifelement (46), das Greifmittel (49) für den Aufzeichnungsträgeranfang aufweist, wobei zum Einfädeln in die Wendeeinrichtung der Aufzeichnungstrageranfang im Bereich der ersten Schrägumlenkvorrichtung (32) erfaßt und über die Umkehreinrichtungen (34, 36) und die zweite Schrägumlenkvorrichtung (37) bis in den Bereich des Papierauslaufkanales (31) transportiert wird, versehen ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4435797 | 1994-10-06 | ||
DE4435797 | 1994-10-06 | ||
PCT/DE1995/001359 WO1996011425A1 (de) | 1994-10-06 | 1995-10-04 | Druckeinrichtung zum front- und rückseitigen bedrucken eines bandförmigen aufzeichnungsträgers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0784808A1 EP0784808A1 (de) | 1997-07-23 |
EP0784808B1 true EP0784808B1 (de) | 1998-08-12 |
Family
ID=6530143
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95905036A Expired - Lifetime EP0784807B1 (de) | 1994-10-06 | 1995-01-04 | Druckeinrichtung zum front- und/oder rückseitigen bedrucken eines bandförmigen aufzeichnungsträgers |
EP95933306A Expired - Lifetime EP0784808B1 (de) | 1994-10-06 | 1995-10-04 | Druckeinrichtung zum front- und rückseitigen bedrucken eines bandförmigen aufzeichnungsträgers |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP95905036A Expired - Lifetime EP0784807B1 (de) | 1994-10-06 | 1995-01-04 | Druckeinrichtung zum front- und/oder rückseitigen bedrucken eines bandförmigen aufzeichnungsträgers |
Country Status (5)
Country | Link |
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US (2) | US5797079A (de) |
EP (2) | EP0784807B1 (de) |
JP (2) | JPH10507010A (de) |
DE (2) | DE59503197D1 (de) |
WO (2) | WO1996011424A1 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29622735U1 (de) * | 1995-10-27 | 1997-07-17 | Océ Printing Systems GmbH, 85586 Poing | Einrichtung zum Wenden oder Versetzen einer Bahn aus endlosem Aufzeichnungsmaterial |
US5970304A (en) * | 1997-09-30 | 1999-10-19 | Xerox Corporation | Two sided imaging of a continuous web substrate with a single print engine with in line transfer stations |
US7124117B1 (en) | 1998-11-06 | 2006-10-17 | Pitney Bowes Inc. | Method and apparatus for dynamically locating and printing a plurality of postage payment indicia on a mailpiece |
JP3320367B2 (ja) * | 1998-12-08 | 2002-09-03 | 富士通株式会社 | 両面印刷装置および同装置の制御方法 |
US6307614B1 (en) * | 1999-12-01 | 2001-10-23 | Hewlett-Packard Company | Duplexing in automatic document feeder utilizing a path shorter than the length of the document to be duplexed |
JP3877944B2 (ja) * | 2000-08-03 | 2007-02-07 | シャープ株式会社 | 画像出力装置制御システム |
US6705786B2 (en) | 2002-04-11 | 2004-03-16 | Hewlett-Packard Development Company, L.P. | Duplex printing of print sheets |
DE102006009484B4 (de) * | 2006-02-27 | 2010-03-18 | Eastman Kodak Company | Druckmaschine für einen Bogendruck |
CN101405141B (zh) * | 2006-02-28 | 2011-07-27 | 咨询卡有限公司 | 在卷带材料上连续打印图像和将图像连续转印到身份证件 |
US8145076B2 (en) * | 2009-03-27 | 2012-03-27 | Eastman Kodak Company | Print system with drop-in interchangeable modular accessory cartridge |
CN109389777B (zh) * | 2018-10-23 | 2023-11-10 | 江苏国光信息产业股份有限公司 | 一种证件自助办理装置及其操作方法 |
CN109732585B (zh) * | 2019-03-04 | 2023-03-24 | 吉林大学 | 串联式绳驱机械手关节运动的被动解耦机构 |
CN112477450B (zh) * | 2020-10-29 | 2024-02-09 | 深圳普赢创新科技股份有限公司 | 一种具有自动回收装置的打印设备 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0257789A1 (de) * | 1986-07-31 | 1988-03-02 | Konica Corporation | Bilderzeugungsgerät mit einer Vorrichtung zur Feststellung der Restmenge eines lichtempfindlichen Bandes |
JPH08510339A (ja) * | 1993-05-19 | 1996-10-29 | シーメンス ニクスドルフ インフオルマチオーンスジステーメ アクチエンゲゼルシヤフト | 異なる帯幅の帯状記録担体を印刷するエレクトログラフィック印刷装置 |
DE4335473C2 (de) * | 1993-10-18 | 2001-07-12 | Oce Printing Systems Gmbh | Wendeeinrichtung für einen bandförmigen Aufzeichnungsträger |
EP0697634B1 (de) * | 1994-08-19 | 1996-04-17 | Siemens Nixdorf Informationssysteme AG | Wendeeinrichtung für bandförmige Aufzeichnungsträger |
-
1995
- 1995-01-04 EP EP95905036A patent/EP0784807B1/de not_active Expired - Lifetime
- 1995-01-04 WO PCT/DE1995/000008 patent/WO1996011424A1/de active IP Right Grant
- 1995-01-04 JP JP8512234A patent/JPH10507010A/ja active Pending
- 1995-01-04 DE DE59503197T patent/DE59503197D1/de not_active Expired - Fee Related
- 1995-01-04 US US08/817,180 patent/US5797079A/en not_active Expired - Fee Related
- 1995-10-04 EP EP95933306A patent/EP0784808B1/de not_active Expired - Lifetime
- 1995-10-04 DE DE59503198T patent/DE59503198D1/de not_active Expired - Fee Related
- 1995-10-04 US US08/817,179 patent/US5974297A/en not_active Expired - Fee Related
- 1995-10-04 WO PCT/DE1995/001359 patent/WO1996011425A1/de active IP Right Grant
- 1995-10-04 JP JP8512251A patent/JPH10507011A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
WO1996011425A1 (de) | 1996-04-18 |
US5974297A (en) | 1999-10-26 |
DE59503197D1 (de) | 1998-09-17 |
EP0784808A1 (de) | 1997-07-23 |
WO1996011424A1 (de) | 1996-04-18 |
EP0784807B1 (de) | 1998-08-12 |
JPH10507011A (ja) | 1998-07-07 |
US5797079A (en) | 1998-08-18 |
DE59503198D1 (de) | 1998-09-17 |
EP0784807A1 (de) | 1997-07-23 |
JPH10507010A (ja) | 1998-07-07 |
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