DE102022114900A1 - Cylinder with several support elements carrying a number of magnetic elements one behind the other in the circumferential direction and machine for producing optically variable image elements - Google Patents

Abstract

In a cylinder according to the invention with, in the area of its outer circumference in the axial direction, a number m of columns next to each other, each with a number n of magnetic elements arranged one behind the other in the circumferential direction, several or all of the magnetic elements of several or all of the columns are as a respective group on or on a respective ring segment-like, Supporting element interrupted over an angular range over the entire ring cross section with a leading and a trailing end with respect to a production direction of rotation, the respective supporting element being detachably arranged on an inner cylinder body enclosed by the cylinder and variable in its axial position in the released state, and whereby On the support element mounted on the inner cylinder body, in the area between the leading and trailing ends of the ring segment-like support element on the inner cylinder body, a clamping device is provided, through which the two ends spaced apart in the circumferential direction can be acted upon by a force directed towards one another in the circumferential direction via adjusting means comprised by the clamping device . In addition, the invention relates to a machine for producing optically variable image elements with such a cylinder.

Description

The invention relates to a cylinder with several support elements carrying a number of magnetic elements one behind the other in the circumferential direction and to a machine for producing optically variable image elements according to the preamble of claims 1 or 15.

Through the EP 2 114 678 B1 a printing machine with a screen printing unit and a device for aligning magnetic or magnetizable particles contained in the printing ink or the varnish is known, the device comprising a cylinder with a plurality of elements which cause a magnetic field on the circumference, which are arranged in a plurality of axially adjustable support rings . The support rings have openings on their inner circumference, which interact with openings on a shaft carrying the support rings for the passage of suction air. In one example, openings on the shaft are via plugs, e.g. B. screwable elements, selectively lockable. The support rings can be positioned axially on a shaft and clamped thereon by a tensile force acting in the circumferential direction.

The US 2011/0168088 A1 relates to a device for the orientation of magnetic flakes, wherein in one embodiment magnets are arranged on the circumference of disks, which are arranged on an axis and can be exchanged for disks with a different distribution.

Through the CN 103192591 A a device for aligning magnetic or magnetizable particles contained in a coating agent with a cylinder is disclosed, which comprises magnetic elements arranged in a matrix-like manner in the area of its outer circumference. Groups of magnetic elements arranged axially next to one another, arranged one behind the other in the circumferential direction, are each arranged on axially extending support elements and can be moved axially thereon. After axial positioning, the magnetic elements in the support elements can be clamped in the relevant support element by screws acting in the circumferential direction. The support elements can be positioned in the circumferential direction.

The WO 2014/037221 A1 discloses a magnetic cylinder with several cylinder sections, which include several magnetic elements one behind the other on their circumference and areas with suction air openings surrounding both sides of the magnetic elements. Support elements with a cylindrical peripheral surface are provided between such cylinder sections.

The invention is based on the object of creating a cylinder with several support elements carrying a number of magnetic elements one behind the other in the circumferential direction and a machine for producing optically variable image elements.

The object is achieved according to the invention by the features of claims 1 and 15.

The advantages that can be achieved with the invention include: B. in that the cylinder inner body can be particularly easily equipped with ring elements when the clamp connection is released and/or enables a precise fit in the circumferential direction despite axial positioning.

For example, due to the ring structure being open over an angular range, the ring element can be moved more easily on the cylinder body than with an almost closed ring structure. It is also advantageous for a particularly advantageous embodiment, in which a fitting element that is effective in the circumferential direction interacts with a clamping device that is different from the ring element, when equipping the inner cylinder body. The fitting element and the counterpart can form a play-free seat on both sides without hindering axial positioning of the ring element.

In a cylinder according to the invention with a number m of columns next to each other in the area of its outer circumference viewed in the axial direction, each with a number n of magnetic elements arranged one behind the other in the circumferential direction, several or all of the magnetic elements of several or all of the columns are as a respective group on or on a respective ring segment-like, Supporting element interrupted over an angular range over the entire ring cross section with a leading and a trailing end with respect to a production direction of rotation, the respective supporting element being detachably arranged on an inner cylinder body enclosed by the cylinder and variable in its axial position in the released state, and wherein at On the support element mounted on the inner cylinder body, in the area between the leading and trailing ends of the ring segment-like support element on the inner cylinder body, a clamping device is provided, through which the two ends spaced apart in the circumferential direction can be acted upon by a force directed towards one another in the circumferential direction via adjusting means comprised by the clamping device . In particular, the clamping device engages on the two ends of the support element and can be varied in the circumferential direction in its length, which is effective for engaging on both sides, via the adjusting means included in the clamping device.

Even in an additional combination of the clamping device fixing the ring elements with a further development set out below through structural units and / or through the mobility of individual or all magnetic elements in the axial and / or circumferential direction and / or through a clamping device clamping the magnetic elements or structural units, a high level of accuracy can be achieved Treatment of optically variable image elements and/or a high level of flexibility in the range of applications or processes for the provision of optically variable image elements can be made possible or increased.

In a preferred embodiment for processing a printed substrate using a cylinder designed as a magnetic cylinder, this cylinder comprises, in a matrix-like manner, a number in the area of its outer circumference, e.g. B. n x m (with n, m 0 1), magnetic elements which are arranged in rows running parallel to the axis and in columns running in the circumferential direction, as well as suction elements with suction openings pointing outwards,

In an advantageous development, in several, preferably all, of the columns of magnetic elements, several, in particular all, of the magnetic elements arranged one behind the other are combined with at least one assigned suction element in respective structural units as active units and as such as a whole, i.e. H. including magnetic element and suction element, and each can be positioned in the circumferential direction independently of all other such active units and/or can be detached from the cylinder. In an advantageous development, active elements designed as structural units of the same row or preferably the same column are mounted row by row or preferably column by column on a common support element, which z. B. can be positioned on a cylinder inner body overall in the circumferential or preferably in the axial direction - at least within a respective adjustment range.

In an advantageous embodiment of the development, several such structural units, which each comprise at least one line interface for the passage of suction air on their underside, are provided on an inner cylinder body or on common support elements arranged on the inner cylinder body, with the cylinder inner body and / or the respective support element on one The outward-facing side comprises a large number of line interfaces with optionally closable bushings, in particular bores, for the passage of suction air.

Basically independent of the embodiment with the above. Active units, but particularly advantageously in connection with this, have a particularly advantageous development of the device for aligning magnetic or magnetizable particles contained in printing ink - in particular particles which are provided in printing ink by printing elements applied in columns and lines on a section of printing material - a cylinder , which in the area of its outer circumference, viewed in the axial direction, has a number next to each other, e.g. B. from four to eight columns or groups, each with a number, e.g. B. 2 to 12, in particular 5 to 10, of elements which provide magnetic fields arranged one behind the other in the circumferential direction, or magnetic elements for short, in which in several of the columns or groups of magnetic elements arranged one behind the other in the circumferential direction at least one of the magnetic elements is independent of at least one further magnetic element of the same Column or group are arranged or mounted in an axially adjustable manner on a one-piece or multi-part cylinder body of the cylinder. The axial direction here and below refers - unless explicitly stated otherwise - to a direction parallel to the axis of rotation of the cylinder. Preferably, several or even all magnetic elements of several or even all columns or groups are mounted or mounted in such an axially adjustable manner.

Basically independent of the embodiment with the above. Active units, but particularly advantageous in connection with this, are an advantageous development of the device for aligning, wherein at least two, preferably all of the magnetic elements provided one behind the other in the same column are mounted as a group on or on a common support element and with this together and independently of the magnetic elements an adjacent column can be varied with respect to their axial position in or on the cylinder, the at least two or all magnetic elements of the relevant group are arranged on respective magnetic element carriers which can be positioned independently of one another in the circumferential direction on the common support element and/or which can be detached from the support element and on the relevant magnetic element carrier axial direction within an adjustment range. This preferably applies to several, in particular all, columns.

Basically, independently of the embodiment with the above-mentioned active units and/or of an above-mentioned embodiment with axially positionable magnetic elements, but preferably in conjunction with one or more of the advantageous embodiments mentioned, an advantageous development of the device for aligning magnetic or magnetizable particles on a cylinder, which has a matrix-like number in the area of its outer circumference, e.g. B. nxm, with n, m 0 1, includes magnetic elements which are parallel to the axis extending rows and in columns extending in the circumferential direction are arranged, with at least two, preferably all, of the magnetic elements provided one behind the other in the same column being arranged on or in magnetic element carriers which are different from one another and can be positioned independently of one another in the circumferential direction on the cylinder, and wherein the at least two or all Magnetic elements arranged on the respective magnetic element carriers are mounted such that they can be adjusted in the circumferential direction within an adjustment range relative to the magnetic element carrier carrying the respective magnetic element.

Basically independent of the design of the cylinder with the above. Effective units and/or one of the above. Embodiment of the cylinder with axially positionable magnetic elements and/or one of the above. Embodiment of the cylinder with magnetic elements that can be positioned in the circumferential direction, but preferably in conjunction with one or more of the advantageous embodiments mentioned, a particularly advantageous development of the cylinder in the area of its outer circumference, viewed in the axial direction, has a number m of groups next to one another, each with a number of groups in the circumferential direction magnetic elements arranged one behind the other, wherein several or all magnetic elements of a group, in particular several or all groups, are mounted on or on a common ring-like support element arranged on an inner cylinder body and can be positioned on the support element in the circumferential direction, and wherein the magnetic elements, one receiving the magnetic elements Bracket or a magnetic element carrier carrying the magnetic elements, viewed in the axial direction of the cylinder, comprise at least one clamping element on both sides, the effective end of which, in the assembled state, extends in the circumferential direction on the respective end face of the ring-like support element and is directed inwards, i.e. H. with its surface normal pointing into a cylinder interior, and / or a radial removal of the magnetic element or magnetic element carrier by interacting with the clamping element located in the clamping position, engages under the stop surface.

In a particularly advantageous embodiment in conjunction with one of the above. Clamping device for the magnetic elements, the holders or the magnetic element carriers, a mounting aid is provided for mounting and / or positioning magnetic elements on such a cylinder, which can be placed on the magnetic element or a magnetic element carrier carrying the magnetic element and which includes actuating arms which are located on the magnetic element or placed on the magnetic element carrier with the clamping elements provided on both sides of the relevant magnetic element can be brought into operative connection, an existing clamping connection between the bilateral clamping elements and the support element being releasable via the actuating arms by actuating a drive means included in the assembly aid and acting on the actuating arms.

In particular a machine, e.g. B. Securities printing machine, for producing optically variable image elements on printing material sections, with a printing material template, in particular designed as a sheet feeder, with at least one printing unit, in particular a screen printing unit, through which substrate guided on a transport path through the machine at least on a first side in a matrix-like manner with the use of a number of columns and a number of lines is and / or can be printed, and with a product holder, through which processed substrate can be combined in containers, in particular designed as a stack delivery, preferably includes a device for aligning magnetic in the transport path of the printing material sections between the printing unit and the product holder or magnetizable particles in one of the above. or combined version or one of the above. Cylinder.

Further details and design variants can be found in the exemplary embodiments.

Embodiments of the invention are shown in the drawings and are described in more detail below.

• 1 ein Ausführungsbeispiel für eine Maschine zur Erzeugung optisch variabler Bildelemente auf einem Substrat;
• 2 eine schematische Darstellung eines in Druckelementen mit optisch variablem Beschichtungsmittel bedruckten Substrates, wobei a) einen Zustand mit noch nicht orientierten magnetischen oder magnetisierbaren Partikeln und b) einen Zustand nach einem Ausrichten eines bildgebenden Teils zeigt, hier exemplarisch in Form einer Ziffer „1“;
• 3 eine schematische Darstellung eines Druck- und stromabwärtigen Ausrichtprozesses mit einem bildgebenden Druckwerkzylinder und einem Magnetelemente aufweisenden Zylinder, beispielhaft dargestellt mit einem sich zum nachlaufenden Ende hin trapezförmig verbreiternden Substratbogen;
• 4 ein Ausführungsbeispiel für einen Magnetzylinder in perspektivischer Darstellung;
• 5 eine Einzeldarstellung eines in Umfangsrichtung hintereinander mit exemplarisch mehreren Magnetelementen bestückten Tragelementes;
• 6 eine Schnittansicht durch ein mit einem Magnetelement bestückten Tragelement, jedoch in gegenüber 5 schmalerer Ausführung;
• 7 ein Ausschnitt aus einem Längsschnitt durch einen Zylinder gemäß 4;
• 8 ein Ausführungsbeispiel eines eine Saugluftöffnung wahlweise freigebenden und abschließenden Ventils;
• 9 ein Ausführungsbeispiel für eine ein Magnetelement und ein Saugelement umfassende Wirkeinheit in einer weniger aufwändigen Ausgestaltung;
• 10 eine Draufsicht auf eine Wirkeinheit gemäß 9, jedoch ohne Magnet und Gehäuse;
• 11 einen Schnitt durch ein Ausführungsbeispiel für eine ein Magnetelement und ein Saugelement umfassende Wirkeinheit mit erkennbarem Stellmechanismus für ein axiales Stellen des Magnetelementes;
• 12 einen Schnitt durch ein Ausführungsbeispiel für eine ein Magnetelement und ein Saugelement umfassende Wirkeinheit mit erkennbarem Stellmechanismus für ein Stellen des Magnetelementes in Umfangsrichtung;
• 13 eine perspektivische Darstellung eines Montagehilfsmittels zum Anbringen bzw. Abnehmen und/oder Positionieren einer Wirkeinheit;
• 14 eine perspektivische Darstellung einer auf einem Ringelement angeordneten Wirkeinheit mit aufgesetztem Montagehilfsmittel aus 13;
• 15 eine perspektivische Darstellung eines mit sechs Ringelementen bestückten Zylinderinnenkörpers;
• 16 eine Querschnittsdarstellung eines Zylinders mit einem Zylinderinnenkörper, einem darauf angeordneten ringsegmentartigen Tragelement und beispielhaft zehn auf letzterem angeordneten Wirkeinheiten;
• 17 einen die Befestigungsvorrichtung für das Tragelement vergrößernden Ausschnitt;
• 18 einen ein Detail aus der Befestigungsvorrichtung für das Tragelement aufzeigenden Ausschnitt.

Show it:

• 1 an exemplary embodiment of a machine for producing optically variable image elements on a substrate;
• 2 a schematic representation of a substrate printed in printing elements with an optically variable coating agent, wherein a) shows a state with not yet oriented magnetic or magnetizable particles and b) shows a state after an imaging part has been aligned, here exemplarily in the form of a number “1”;
• 3 a schematic representation of a printing and downstream alignment process with an imaging printing cylinder and a cylinder having magnetic elements, shown as an example with a substrate sheet that widens in a trapezoidal shape towards the trailing end;
• 4 an embodiment of a magnetic cylinder in a perspective view;
• 5 an individual representation of a support element equipped one behind the other in the circumferential direction with, for example, several magnetic elements;
• 6 a sectional view through a support element equipped with a magnetic element, but opposite 5 narrower version;
• 7 a detail from a longitudinal section through a cylinder according to 4 ;
• 8th an embodiment of a valve that selectively releases and closes a suction air opening;
• 9 an exemplary embodiment of an active unit comprising a magnetic element and a suction element in a less complex embodiment;
• 10 a top view of an active unit according to 9 , but without magnet and housing;
• 11 a section through an exemplary embodiment of an active unit comprising a magnetic element and a suction element with a recognizable adjusting mechanism for axially adjusting the magnetic element;
• 12 a section through an exemplary embodiment of an active unit comprising a magnetic element and a suction element with a recognizable adjusting mechanism for positioning the magnetic element in the circumferential direction;
• 13 a perspective view of an assembly aid for attaching or removing and/or positioning an active unit;
• 14 a perspective view of an active unit arranged on a ring element with attached assembly aids 13 ;
• 15 a perspective view of a cylinder inner body equipped with six ring elements;
• 16 a cross-sectional view of a cylinder with a cylinder inner body, a ring segment-like support element arranged thereon and, for example, ten active units arranged on the latter;
• 17 a cutout enlarging the fastening device for the support element;
• 18 a detail showing a detail from the fastening device for the support element.

A machine 01, e.g. B. printing machine 01, in particular securities printing machine 01, for producing optically variable image elements 03 on a substrate 02, e.g. B. a web or sheet-shaped printing material 02, comprises an application device 04, e.g. B. a printing unit 04, through which optically variable coating agent 06, e.g. B. optically variable printing ink 06 or varnish 06, at least one application point, e.g. B. printing point 11, on at least a first side of the substrate 02, z. B. the printing material 02, can be applied over the entire surface or in partial areas in the form of printed image elements 08, as well as a device 07 for aligning particles P contained in the optically variable coating agent 06 applied to the substrate 02 and responsible for the optical variability (see, for example, . 1 ). This device 07 is also referred to below as the alignment device 07 or, since it effects imaging for the optically variable pattern or motif through defined alignment of the particles P, also as the imaging alignment device 07. An application of coating agent 06 containing particles P on the printing material 02 and an image element 03 obtained by subsequent imaging alignment of previously randomly oriented particles P is, for example. Am 2 shown schematically using a representation of the number “1”. In this case, a) represents a state in which the coating agent 06 is applied and, for example, still randomly oriented and b) a state in which an imaging alignment has taken place.

The printed image elements 08 made of variable coating agent 06, which are applied to the substrate 02 by the application device 04 before the treatment by the alignment device 07, can correspond in size and position to the optically variable image elements 03 to be produced or possibly be larger than these, possibly even larger the area extends to several uses 09. In the case of larger printed image elements 08, for example, an optically variable image element 03 is not produced by aligning on the entire surface coated with optically variable coating agent 06.

The particles P responsible for the optical variability are here in the coating agent 06, e.g. B. the printing ink 06 or the varnish 06, magnetic or magnetizable, non-spherical particles P, e.g. B. pigment particles P, also referred to below as magnetic flakes.

The machine 01 is preferably used to produce panels 09, e.g. B. securities 09, in particular banknotes 09, executed. This should in particular include the production of intermediate securities products, e.g. B. the production of printing material 02, in particular in the form of web or sheet-shaped printing material sections 02, ins special printing material sheets 02, with printed images of several securities 09. The substrate 02 can be through - e.g. B. cellulose or preferably cotton fiber based or at least containing paper, be formed by plastic polymer or by a hybrid product thereof. It can be present uncoated or already coated before coating in the above-mentioned application device 04, it can be unprinted or already printed once or several times in one or more upstream processes or otherwise mechanically processed. On a printing material section 02 formed by a longitudinal section of a web-shaped substrate 02 or by a sheet of a sheet-shaped substrate 02, several blanks 09, e.g. B. banknotes 09 to be produced or their printed images, arranged next to one another in rows running transversely to the transport direction T and one behind the other in columns running in the transport direction T or to be arranged in the course of processing the substrate 02 (indicated, for example, in 2 and in 3 ).

The machine 01 designed as a printing press 01 can in principle comprise one or more printing units 04 of any printing process. In the embodiment shown here, however, for the sake of simplicity, it comprises a printing unit 04, in particular a printing unit 04 operating according to the flexographic printing process or preferably according to the screen printing process, through which the optically variable coating agent 06 is or can be applied to a first side of the printing material 02. The printing processes mentioned, in particular the screen printing process, z. B. a greater layer thickness can be applied compared to other printing processes. The expression of the “first side” of the substrate 02 or the printing material 02 is chosen arbitrarily and is intended to denote that side of the printing material 02 on which optically variable coating agent 06 to be treated downstream by the alignment device 07 is or has been or can be applied .

In the illustrated and preferred embodiment, the printing press 01 comprises a substrate template 13, preferably designed as a sheet feeder 13, from which the z. B. formed as a sheet-shaped printing material 02 substrate 02 - possibly via further printing or processing units - the at least one printing unit 04 applying the optically variable coating agent 06, e.g. B. flexo or preferably screen printing unit 04, is or can be supplied, which is between a printing unit cylinder 14, in particular a forme cylinder 14, z. B. a screen printing cylinder 14, and a common impression cylinder 17 a printing point 11 for printing a z. B. forms the first side of the printing material 02 (see e.g. 1 ).

The printing unit 04 preferably comprises, as an imaging cylinder, a forme cylinder 14 with a plurality of, in particular similar and/or the same, imaging printing elements 18, hereinafter also referred to as printing subjects 18, or, in particular similar and/or the same, groups of imaging printing elements 18 or . Print subjects 18 on the circumference, which are in several, e.g. B. a number, e.g. B. from four to eight, especially five to seven, e.g. B. six columns spaced apart from one another transversely to the transport direction T and on a cylinder width corresponding to the print image width are arranged in several rows spaced apart from one another in the transport direction T. In the case of a printing unit 04 that uses flexographic printing, these printing subjects 18 are designed in the form of letterpress reliefs and, in the preferred case of a printing unit 04 that uses screen printing, in the form of through-print stencils.

From the printing unit 04 applying the optically variable coating agent 06, the printing material 02 of the alignment device 07 is conveyed via conveying means, e.g. B. one or more conveyor devices 12 designed as transport cylinders 12 can be fed. In the case of web-shaped printing material 02, the conveying means could be formed by one or more positively driven and/or undriven rollers.

After passing through the alignment device 07, described in detail below, the printing material 02 is directly or via further funding, e.g. B. further transport cylinders of another, e.g. B. second conveyor device 21 and can be fed through this to a product holder 22 for receiving the printing material 02 processed and/or processed in the machine 01, in the case of sheet-shaped printing material 02 to a stack delivery 22. For the preferred case of sheet-shaped printing material 02, sheet-feeding means, e.g. B. one or more transfer cylinders or drums or, as shown here, a z. B. designed as a gripper circulation conveyor 21 conveyor device 21, in particular a chain gripper system 21, is provided, through which the printing material sheets 02 are taken over from the transport path section of the alignment device 07 via possibly one or more further transport cylinders and z. B. the stack delivery 22 are fed.

On the transport path leading away from the alignment device 07, at least one drying device with one or more dryers 23 directed towards the first side of the printing material 02, e.g. B. radiation dryers 23, and possibly a cooling device, not shown, e.g. B. cooling roller, may be provided. In a further training course not shown An inspection device (not shown), e.g. B. an area or line camera can be provided.

In an advantageous development, the printing unit 04 and the alignment device 07, e.g. B. in the manner of a module, structurally combined to form a device 16 for generating optically variable image elements. This can, for example, be provided several times in a row in the machine 01 in a further development. In an advantageous embodiment in the form of a module, the device 16 is inserted or can be inserted into the transport path of the machine 01 to be equipped with input and output interfaces to corresponding interfaces of a conveyor system that continues upstream and downstream.

The alignment device 07, which is set out in detail below, is basically arbitrary in its designs, design variants or configurations, but is preferably provided or can be provided in a machine 01 or printing press 01 described above.

The alignment device 07 for forming optically variable image elements 03, e.g. B. to form the optically variable effect in the previously - e.g. B. in the form of printed image elements 08 - optically variable coating agent 06 applied to the substrate 02, in particular to the printing material 02, comprises a defined transport path along which the substrate 02 to be conveyed by the alignment device 07 from an entrance area in which the substrate to be treated and substrate 02 having optically variable coating agent 06 on its first side is supplied or can be supplied, in a defined manner with an alignment device 26 which, as active elements 24, comprises elements 24 which provide magnetic fields, or magnetic elements 24 for short, is or can be brought into operative connection , preferably in such a way that the magnetic elements 24 of the alignment device 26 used for the imaging alignment and the printing material 02 printed with the printing ink 06 containing the particles P move synchronously with one another at least on a section of the transport path. The alignment device 26 is designed here as a magnetically effective cylinder 26, or magnetic cylinder 26 for short, which has the arrangement of magnetic elements 24 on the circumference and via which the printing material 02 is guided or conveyed from an input area towards an output area of the alignment device 07.

The magnetic elements 24 can be formed directly by one-part or multi-part magnets 27 themselves or can preferably comprise one or more magnets 27, which are in or on a holder 28, e.g. B. on or in a base 28, - preferably detachable - is or are arranged. Magnets 27 here are generally understood to be magnetically effective devices which permanently or switchably produce a magnetic field that is permanently or switchable at least towards the side of the transport path - in particular for the alignment of particles P contained in the coating agent 06 on the substrate 02 guided over it as described here. The magnets 27 can be formed by one or more permanent magnets with or without engraving, by electromagnets or by combinations of one or more permanent and/or one or more electromagnets. Regardless of whether it is a single magnet or a combination of several magnets, e.g. B. permanent and / or electromagnets, the term magnet 27 is also understood below to mean several magnets 27 assigned to the same magnetic element 24 and forming a magnetic unit in their entirety, unless explicitly stated otherwise. Under the magnetic element 24, versions with a plurality of one-part or multi-part magnets 27 encompassed by the magnetic element 24 and spaced apart from one another should also be included, as can be used, for example, in the case that a self-use 09 is subjected to a respective magnetic field at two different points should be. Such a magnet 27 or an arrangement of several magnets 27 of the same magnetic element 24 can be accommodated in a housing 38 of the magnetic element 24, which z. B. is detachably arranged in or on the holder 28 from the holder 28.

In principle, two such magnetic cylinders 26 can also be provided in the transport path, which are arranged on the same or on different sides of a substrate 02 to be conveyed along the transport path.

In an advantageous embodiment, the alignment device 07 is a drying and/or curing device 19, e.g. B. assigned a radiation dryer 19, in particular UV radiation dryer 19, UV dryer 19 for short, which is preferably designed as a UV LED dryer 19 and / or is directed at a point in the transport path at which the substrate 02 with the magnetic cylinder 26 interacts.

The magnetic cylinder 26 is preferably arranged on its second side in the transport path of the substrate 02 to be conveyed, so that its first side, which is coated inline with optically variable coating agent 06, in particular upstream, faces outwards when passing through the magnetic cylinder 26, in particular during transport over the magnetic cylinder 26 .

The magnetic cylinder 26 comprises a one-part or preferably multi-part cylinder body 29, on or on which the magnetic elements 24 are arranged, preferably detachably. The one-part or preferably multi-part cylinder body 29 can be rotatably stored or stored in a frame. The term cylinder body 29 is intended to cover both closed structures, ie with a more or less closed cylinder surface, as well as open structures, ie scaffold or frame-like structures such as. B. that too 4 Example presented include.

The magnetic cylinder 26 has in the area of the side facing the substrate path, e.g. B. in the area of the outer circumference, in particular in the area of an outer cylindrical envelope surface of the cylinder body 29, the plurality of magnetic elements 24, which serve to orientate at least some of the magnetic or magnetizable particles P of the coating agent 06 applied to the passing printing material 02.

In particular for the preferred and illustrated case of a plurality of panels 09 per substrate section, e.g. B. per printing material or substrate sheet 02, there are several, in particular a number m (m 0 1 > 1) of columns or groups, each with several, in particular one, corresponding to the number of columns on the printing material section 02, on the cylinder body 29 when viewed in the axial direction Number of rows of panels 09 on the printing material section 02 to be treated corresponding number n (n 0 1 > 1) of lines running parallel to the axis or, viewed in the transport direction T of the substrate 02 and / or in the circumferential direction of the cylinder 26, magnetic elements arranged one behind the other in a column or group 24 provided or arranged like a matrix, i.e. H. There are a number of n x m, in words n times m, on the outer circumference in a matrix-like manner; with n, m 0 1, magnetic elements 24 are provided. They are preferably arranged in such a way that the same number n of magnetic elements 24 are provided on the circumference per column or group and are arranged in rows running parallel to the axis and/or in particular in such a way that when they are unrolled on the substrate 02 - a correct register between the substrate layer in Transport direction T and cylinder angular position provided - correspond to the pattern of the image elements 03 to be subjected to magnetic fields on the substrate 02. The row- or column-wise arrangement should also be understood to mean the corresponding grid-like or matrix-like arrangement in the event that some of them are slightly offset from one another in an axially parallel direction for correction or adjustment purposes. The n magnetic elements 24 of the columns or groups arranged one behind the other are then arranged one behind the other in the circumferential direction, for example at least in such a way that they at least overlap when rolling along a circular circumferential line and / or lie in use 09 of the same column of a substrate 02 to be treated even if they may be slightly offset from one another for correction or adjustment purposes. For the axially parallel arrangement, the same applies to any minor mutual deviations in the circumferential direction.

By guiding the substrate 02 over a magnetic cylinder 26 designed in this way, for example the first substrate side facing outwards during transport over the first cylinder 26, an alignment or orientation of particles P in the area of the image elements 03 provided on the panel 09 is possible by means of the magnetic elements 24, here z. B. can be effected through the substrate 02.

The number m of columns or groups is, for example, four to eight, in particular five and seven, e.g. B. six and / or the number n of magnetic elements 24 of a column or group z. B. at two to twelve, advantageously at five to ten. The magnetic cylinder 26 or its cylinder body 29 is preferably designed such that the number m of columns or groups and/or the number n of rows or of magnetic elements 24 arranged one behind the other in a column or group - for example within the limits mentioned above - can be varied in order to adapt them to different requirements.

Preferably, the magnetic elements 24 - preferably in or on a corresponding holder 28 together with this - are releasably arranged or can be arranged on the cylinder 26 so that in the assembled state they can be arranged at a defined location on the circumference of the cylinder 26 and preferably completely removable from the cylinder 26 and/or can be positioned on the circumference of the cylinder 26 in the axial and/or circumferential direction.

For the above-mentioned matrix-like arrangement, magnetic elements 24 can be arranged and mounted on or in a cylinder body 29 in such a way that their axial position relative to the one-part or multi-part cylinder body 29 can be varied at least relative to other magnetic elements 24 of the same column or group of magnetic elements 24 or are stored in it. This can be realized, for example, via axially extending guides on the circumference of the cylinder body 29, in or on which the relevant magnetic elements 24 are mounted directly or indirectly and can be moved into different axial positions. Such guides could in principle be individual for individual magnetic elements 24 of a line (see, for example, the version according to 11 , but possibly also continuously for several or all magnetic elements 24 of the same Line should be provided. In this case, the guides could be provided on the above-mentioned axially extending support elements, which carry all magnetic elements 24 in the same row.

In an advantageous embodiment, the magnetic elements 24 are of a respective row or preferably of a respective column - possibly in addition to an independent axial and/or circumferential positioning of individual or all magnetic elements 24 of the row or column as a whole and independently of an adjacent one, as explained in more detail below Row or column in the case of the row can be varied with respect to its position in the circumferential direction and in the case of the column as a group presented here with respect to its axial position on the magnetic cylinder 26 or on the cylinder body 29. For the case of a row combined as a group, not shown here, in particular several, preferably the magnetic elements 24 of all rows are each z. B. summarized line by line on axially extending support elements as groups that can be positioned together in the circumferential direction. In the preferred case of columns combined as groups, in particular several, advantageously at least the two columns closest to the end face, and advantageously all columns are mounted as groups in an axially movable manner in or on the magnetic element carrier 29, in particular cylinder body 29

In the preferred case of columns combined into groups, the magnetic elements 24 can - directly or indirectly - in or on several, e.g. B. a number m of z. B. four to eight, especially from five to seven, e.g. B. six, axially spaced apart and preferably to one part or preferably all of them in the axial direction on a cylinder inner body 32, in particular an axially extending shaft 32, preferably ring-like support elements 31, e.g. B. here ring elements 31, arranged or can be arranged, with in or on these ring elements 31 in turn several, e.g. B. from two to twelve, advantageously five to ten, magnetic elements 24 are arranged or can be arranged one behind the other in the circumferential direction and preferably at least partially or all in the circumferential direction (see e.g. 4 and 5 ).

In the case of a web-shaped substrate 02, the magnetic cylinder 26 can be used without any holding means acting on the substrate 02 and e.g. B. be designed with ring elements 31 closed in the circumferential direction. For the case of arcuate substrate 02, which is preferred here, holding means 33, e.g. B. gripper 33 of a so-called gripper bar, is provided, through which a substrate sheet 02 to be conveyed via the cylinder 26 can be picked up with its leading end and held over an angular range during a rotation of the cylinder 26. A magnetic cylinder 26 designed in this way simultaneously serves to transport the substrate 02. The ring elements 31 are z. B. such as Am 4 and 5 can be seen interrupted in the circumferential direction to accommodate the holding means 33. Therefore, the term “ring-like” support elements or “ring elements” should also include non-closed, i.e. ring segment-like elements, unless an explicit distinction is made. In 5 are possibly fastening means used for fastening - such as those used, for example, in connection with an exemplary embodiment according to the figures 15 until 18 and also for the explanations from the figures 1 until 14 are applicable - not shown further.

In a particularly advantageous embodiment of the magnetic cylinder 26, individual structural units 36, which are positioned or can be positioned in a matrix-like manner in columns and rows on or in the cylinder body 29 in the above sense, are provided for several or all magnetic elements 24, which are also referred to below as active units 36, in particular magnetic unit 36, which each include at least one magnetic element 24 and at least one suction element 34.

In a particularly preferred embodiment of the device 07 for aligning magnetic or magnetizable particles P, in several, preferably in all, of the m columns of magnetic elements 24, there are several, in particular all, of the magnetic elements 24 arranged one behind the other with at least one assigned suction element 34 in respective structural units 36 summarized as active units 36 and as such can be positioned overall and independently of all other such active units 36 in the circumferential direction and / or detachable from the cylinder 26.

The active units 36 each include a magnetic element carrier 37, on or in which the magnetic element 24 is arranged on its outward-facing side. The at least one suction element 34 can be integrated into the magnetic element carrier 37 as part of it or arranged on it as a separate part. Preferably, the active unit 36 - viewed in the axial direction of the cylinder 26 - comprises at least one suction element 34 on both sides of the magnetic element 24. The respective suction element 34 comprises in the direction directed outwards, ie outside the cylinder 26 and/or at the level of the cylinder envelope lying surface several suction openings 42, which, for example, in a suction air channel 39 (see e.g. 11 ) are provided in the cover element 41 which covers the suction element 34 and is preferably detachably fastened over the suction channel 39. One in the figures The unrecognizable channel arrangement leads from the respective suction air channel 39 through the active unit 36 to a bottom-side line interface 43, which z. B. by at least one recess 43 that is open towards the inside of the cylinder (see e.g. 11 ) is formed in a bottom of the active unit 36 facing the interior of the cylinder. Through this at least one recess 43 or the line interface 43 formed here and assigned to the active unit 36, air can be sucked in from the suction openings 42 connected via the channel arrangement and the suction air channel 39.

In principle, in an embodiment not shown, the active units 36 can be arranged in a matrix-like manner, directly or indirectly, on a z. B. cylindrical lateral surface 44 of the axially extending cylinder inner body 32, in particular the shaft 32, can be arranged or arranged. This or these points z. B. on a longitudinal section that directly or indirectly supports the magnetic elements 24 as suction air leading line interfaces 46 radially outwardly directed suction air openings 46, which z. B. via radial bushings 47, e.g. B. holes 47, with a z. B. axially extending in the shaft 32 and from at least one cylinder end with suction air to be applied channel 48, z. B. Suction air channel 48 is in line connection.

In the event that the active units 36 are directly in a matrix-like manner, i.e. H. directly on the above-mentioned Lateral surface 44 of the axially extending cylinder inner body 32 or the shaft 32 are arranged or are to be arranged, the active units 36 are or will be positioned on the lateral surface 44 in such a way that the line interface 43 is at the bottom of the active unit 36, here z. B. the free cross section of the above. Recess 43 in the bottom of the respective active unit 36, with at least one of the z. B. suction air openings 46 in the shaft 32 formed line interfaces 43 overlaps. The above Recess 43 forms here z. B. a chamber 43 delimited on the bottom by the lateral surface 44, with a wall completely surrounding the recess 43 in the foot area of the active unit 36 with an opposite region of the lateral surface 44 of the shaft 32 forming a sealing surface sealing the chamber 43 all around. In this embodiment, the air is supplied from the suction openings 42 in the relevant suction element 34 via the suction air channel 39 and the channel arrangement, via which z. B. line interface 43 of the active unit 36 formed by the recess 43 and at least one suction air opening 46 of the cylinder inner body 32 and the suction air channel 48 are sucked in. For such an implementation z. B. suitable fasteners, e.g. B. in the form of clamp or screw connections, through which the respective active unit 36 can be fixed on the lateral surface 44.

In the particularly advantageous embodiment shown here, however, the active units 36 are not arranged or can be arranged directly on the section of the cylinder inner body 32 or the shaft 32 having the suction air openings 46, but rather several or preferably all of the active units 36 provided for a respective column as a group or on a particularly ring-like support element 31 already mentioned above, e.g. B. ring element 31, wherein advantageously at least the outermost ones on both sides, but preferably all of the support elements 31 carrying the respective group or column of active units 36 on the cylinder inner body 32 or the shaft 32 can be varied in their axial position.

The preferably ring-like support elements 31 or ring elements 31 point inwards, i.e. H. in the assembled state, the side facing the cylinder inner body 32 or the shaft 32 as well as line interfaces 49 assigned to the relevant support element 31 on an outward-facing side; 51, as well as a channel arrangement that connects one or more of the inside line interfaces 49 to one or more of the outside line interfaces 51 for the passage of suction air. There are on the inside as line interfaces 49 z. B. recesses 49 are provided in a wall 52 pointing towards the inside of the cylinder, each of which has a line connection via one or more channels 53 running in the ring element 31 to lead through the support element 31 to outside line interfaces 51 and z. B. radial bushings 54, e.g. B. holes 54. Although the openings of individual bores 54 could also simultaneously represent the externally effective line interfaces 51, one or in particular several of the bores 54 preferably also lead into a z. B. the outer line interface 51 forming recess 51 in the outward-facing wall 56 of the support element 31.

The ring elements 31 are or are z. B. positioned on the lateral surface 44 in particular in such a way that the respective line interfaces 49 are on the inside of the ring element 31, here z. B. the free cross section of the above-mentioned recess 49, overlaps with at least one of the suction air openings 46 in the shaft 32 or the cylinder inner body 32. The above-mentioned recess 49 forms z. B. a chamber 49 delimited on the bottom by the lateral surface 44, with a surface of the inward-facing wall 52 of the ring element 31 lying outside the recess 49 on the inward-pointing side of the ring element 31 form a sealing surface sealing the chamber 49 in an opposite region of the lateral surface 44. In a similar way, z. B. the active units 36 are positioned in particular on the outward-facing side of the ring element 31 so that the line interface 43 is at the bottom of the active unit 36, here z. B. the free cross section of the above-mentioned recess 43 in the bottom of the relevant active unit 36, overlaps with at least one of the outer line interfaces 51 on the outward-facing side of the ring element 31. The recess 43 forms z. B. a chamber 43 delimited on the bottom by the outer wall 56, the wall completely surrounding the recess 43 in the foot area of the active unit 36 forming a sealing surface sealing the chamber 43 with an opposite area of the wall 56 of the support element 31. In this embodiment, the air is supplied from the suction openings 42 in the relevant suction element 34 via the suction air channel 39 and the channel arrangement, via which z. B. line interfaces 43 formed by the overlapping recesses 43 and 51; 51, the channel arrangement of the ring element 31, which z. B. line interface 49 formed by the recess 49 on the inside of the ring and at least one suction air opening 46 as well as the suction air channel 48 and z. B. sucked in via a rotary union from a suction air source located outside the cylinder 26.

The respective pattern of the suction air openings 46 or line interfaces 46 on the cylinder inner body 32 and the position and shape of the interacting line interface(s) 43 or recess(s) 43 in the bottom area of the active unit 36 in connection with the first above-mentioned. Variant (without support element 31) are preferably coordinated with one another so that continuous positioning of the active unit 36 in the circumferential direction over at least an adjustment range of two drinking air openings 46 spaced apart in the circumferential direction on the shaft 32 is made possible by the fact that in the first variant in each im Position at least one of the suction air openings 46 or line interfaces 46 in the relevant adjustment range is completely covered by the underside of the active unit 36, while at the same time the opening cross section of the at least one suction air opening 46 or line interface 46 is at least partially connected to the bottom line interface 43 or recess 43 of the active unit 36 overlapped.

The respective pattern of the suction air openings 46 or line interfaces 46 on the cylinder inner body 32 and the position and shape of the cooperating line interface(s) 49 or recess(s) 49 on the inside of the support element 31 as well as the position and shape of the cooperating line interfaces 51; 43 or recesses 51; 43 on the outside of the support element 31 on the one hand and in the bottom area of the active unit 36 on the other hand in connection with the second variant (comprising the support elements 31) are preferably coordinated with one another so that in the circumferential direction a continuous positioning of the active unit 36 in the second variant over an adjustment range of at least two line interfaces 51 or recesses 51 on the outside of the support element 31 is made possible in that at least one line interface 51 or recess 51 on the outside of the support element 31 is completely covered by the underside of the active unit 36, while at the same time the opening cross section of the at least one Line interface 51 or recess 51 on the outside of the support element 31 at least partially overlaps with the bottom line interface 43 or recess 43 of the active unit 36.

In connection with variable positioning, in a particularly advantageous development, line interfaces 46; 51 than would be necessary for a single specific operational configuration. However, in order to ensure that line interfaces 46; not covered by active units 36 or ring elements 31; 51 not to suck in false air are closure means 57; 58 is provided, by means of which line interfaces 46; not covered by the active units 36 or the support elements 31; 51 feeding bushings 47; 54 on the cylinder inner body 32 and / or on the outer circumference of the support element 31 can be optionally closed. In the simplest case, this can be a type of plug that is used to close the relevant openings 47; 54 can be inserted and removed again if necessary.

However, preference is given to the bushings 47 and 54, which can be optionally closed. B. as valves 57; 58 trained closure means 57; 58 are provided, which are or can be placed in the closed position in bushings 47 and 54 of bushings 47 and 54 that are not or only partially covered directly by active units 36 or by support elements 31, while at least some of the bushings 47 and 54 are completely through Active units 36 or line interfaces 46 covered by support elements 31; 51 are or can be moved into a passage position.

A preferred embodiment of such a closure means 57; 58 is in the form of a valve 57; 58, which can be moved either into a pass position or into a closed position - without the need for removal or insertion. In an advantageous version are in particular as holes 47; 54 trained bushings 47; 54 only on one side of the clear cross section with the adjoining channels 48 and 53 of the cylinder inner body 32 or the support element 31 in line connection. The valve 57; 58 is e.g. B. in a particularly advantageous embodiment by a sleeve 57; 58 is formed, which has a recess 61 in the side wall 62 on one side, which in a rotational position representing a passage position leads the way into the channel 48 adjoining the suction side in the cylinder inner body 32 or in the support element 31; 53 releases, while in a different rotational position through the sleeve wall the connection to the relevant channel 47; 54 interrupts. In an advantageous embodiment, the sleeve-like valve 57; 58, e.g. B. at least in a section that is further outward in the assembled state, an actuation interface 63 which can be brought into engagement with a tool 59 and via which the valve 57; 58 - in particular without having to be removed - can be rotated between the passage and closure position by the corresponding tool 59. The corresponding tool interface pair 59, 63 comes here z. B. a polygonal key 59 and an inner peripheral section 63 designed as an internal polygon 63 in the sleeve 57; 58 for use.

In a further development of the cylinder 26, a support element 66 is provided between two columns or groups of structural or active units 36, which has a support surface 67; 68 for supporting the substrate 02 conveyed via the cylinder 26. The support surface 67 can be the outwardly directed cylindrical surface 67 of an annular support disk 64 or the outwardly directed surface 68 of a support plate 71 arranged on a support disk 69, for example. B. be made of plastic or metal. The term “circular” should also include a circumference that is not completely closed, i.e. H. circular ring segment-like support disk 69 can be held.

In a particularly advantageous embodiment for the fastening of magnetic elements 24 on the cylinder 26, several or all of the magnetic elements 24 of a group being mounted on or on a common, ring-like support element 31 and can be positioned on the support element 31 in the circumferential direction, the magnetic elements 24 or a The magnetic element carrier 37 carrying the magnetic elements 24, viewed in the axial direction, has at least one clamping element 72 on both sides; 73, e.g. B. a clamping lever 72; 73, the ends of which are effective for clamping, in the assembled state on the respective end face of the ring-like support element 31, which extend in the circumferential direction and are directed inwards, i.e. H. with its surface normal pointing into a cylinder interior and/or a radial removal of the magnetic element 24 or magnetic element carrier 37 through interaction with the clamping element 72 located in the clamping position; 73 counteracting stop surface 74; 77 undercuts. This stop surface 74; 77, in a particularly advantageous embodiment, an inwardly directed surface of a groove 76 running in the circumferential direction at the end in the support element 31; 78, into which the clamping element 72; 73 with its effective, e.g. B. claw or clamp-like end intervenes. The circumferential stop surface 74; 77 or groove 76; 78 next to a stop surface 74 which preferably extends over the full angular range or, as shown, the relevant circular arc section; 77 or groove 76; 78 also a possibly interrupted stop surface 74, which continues in several circular arc sections; 77 or groove 76; 78 be taken. However, the latter can limit the variability of positioning in the circumferential direction. In addition to the strictly radially inward-pointing surfaces, an “inwardly” directed surface here also means surfaces inclined to this, the surface vector of which is focused into the interior of the cylinder, but preferably as a circumferential surface on each end face, directed at the same point on the cylinder axis line and the clamping element 72; 73 thereby provide a stop that is directed against radial removal. In an advantageous embodiment variant, in particular to increase the stability of the seat, there are two circumferentially spaced clamping elements 72; 73 or a clamping element 72; 73 is provided with two claws which interact with the support element 31 at a distance from one another.

Even if the clamping element 72; 73 basically also as a one-armed lever 72; 73 could be designed, it is preferably in the form of a two-armed axis 81 mounted on the magnetic element 24 or its holder 28 or a structural unit 36 comprising the magnetic element 24, e.g. B. pivot axis 81, pivotable lever 72; 73, the lever arm of which is closer to the center of the cylinder and is connected to the stop surface 74; 77 interacting, e.g. B. has a claw or clamp-like part and the lever arm located further out is used for actuation. Preferably, the clamping element 72; 73 in a self-securing manner e.g. B. by a between lever 72; 73, in particular the lever arm located further out, and the magnetic element 24 or the holder 28 or the structural unit 36, an effective spring element 79, in particular a compression spring 79, is spring-loaded in such a way that it is in the clamping position in the rest state, ie without actuation, and the magnetic element 24 or the holder 38 or the structural unit 36 on the support element 31 holds. The fastening device described offers particular advantages together with an assembly aid 97 explained in more detail below.

The above Type of fastening with the fastening means 72 shown; 73, 74, 77 is fundamentally independent of, but advantageous in conjunction with the execution above. Structural units 36, in particular active units 36, and/or the special type of suction air guidance or supply and/or an axial mobility of individual magnetic elements 24, detailed below, and/or a mobility of individual magnetic elements 24, detailed below, in the circumferential direction. Through the clamping elements 72; 73, the connection can be released from the outside without having to remove the relevant magnetic element 24. Through continuous adjustability, a release can take place just to the extent that the relevant magnetic element 24 can be positioned in the circumferential direction against any frictional forces that may still exist, but without z. B. the risk of tipping, slipping or falling.

On some of the figures, e.g. b. 11 , 12 and 14 , an optionally provided line 84 is shown or indicated, which supplies the motor with signals and/or electrical energy in the event that the magnet 27 in the magnetic element 24 is designed to be rotatable by a motor.

As already mentioned above in connection with 2 and 3 explained, respective columns of imaging print subjects 18 running in the circumferential direction of the forme cylinder 14 relate to a same column of panels 09 provided or to be provided one behind the other on the substrate 02. These panels 09 ideally align with one another along the transport direction T and have a uniform width. In cases that deviate from this, for example if a trapezoidal deformation of the substrate 02, which may have already been printed in the pattern of the panels 09, has occurred in a previous process or due to other mechanical or physical stress, such a changed geometry can be achieved by correspondingly varying the arrangement of the printed subjects 18 be countered on the forme cylinder 14. Then the print subjects are aligned in 18 individual columns, e.g. B. not strictly with each other in the circumferential direction, but lie, for example, partly on helical lines that are slightly inclined towards the circumferential line (e.g. in 3 shown exaggerated for better perception). The width of the panels 09 on the substrate 02 increases z. B. from the leading to the trailing end of the substrate section or substrate sheet 02 to or - z. B. with a corresponding reverse feed at the beginning of the printing press 01 - if necessary vice versa. However, there may also be other reasons for a deviation in the relative position between the axial position of individual magnetic elements 24 and the target position for their effect on the substrate 02, such as. B. also a slightly incorrect axial positioning of the magnetic elements 24 on the cylinder 26 etc.

Basically independent of an arrangement of the magnetic element 24 in the above-mentioned manner. Structural unit 36 and/or from the execution of one of the above. Fastening device and / or adjustability in the circumferential direction, but preferably in conjunction with one or more of the advantageous embodiments mentioned, are therefore in a particularly advantageous embodiment at least one in at least several, preferably in all of the columns or groups of magnetic elements 24 running in the circumferential direction the magnetic elements 24 are mounted independently of at least one further magnetic element 24 of the same column or group, at least in the axial direction, adjustable or movable directly or indirectly on the cylinder body 29 of the magnetic cylinder 26. Preferably, several, advantageously at least all but one, but particularly advantageously all, magnetic elements 24 of a same group are axially movable independently of other magnetic elements 24 of the group and/or several, advantageously all but one or all of the magnetic elements 24 of at least the two closest to the end face, In particular, all columns or groups of at least three columns or groups are mounted axially movably in or on the cylinder body 29, independently of other magnetic elements 24 of the respective column or group. This allows the above-mentioned Random or systematic relative deviations of individual magnetic elements 24 can be readjusted or corrected in the axial position. Especially in connection with one of the above. indirect storage of the magnetic elements 24 via magnetic element carriers 37, which directly or via the above. Support elements 31 are provided indirectly on the cylinder body 29, such axially adjustable magnetic elements 24 are preferably axially adjustable on the relevant magnetic element carrier 37 relative to the latter.

In a particularly advantageous embodiment of the cylinder 26 with the nxm magnetic elements 24 arranged like a matrix, at least two or all of the magnetic elements 24 provided one behind the other in the same column are mounted on or on the above-mentioned common support element 31 and together with this and independently of an adjacent group with regard to their axial position in or on the cylinder 26 can be varied, in addition to this the at least two or preferably all magnetic elements 24 of these or preferably each column on respective, independently positionable in the circumferential direction on the common support element 31 and / or detachable from the support element 31 barable magnetic element carriers 37 arranged and on the relevant magnetic element carrier 37 in the axial direction within an adjustment range z. B. of a total of at least 1 mm, preferably at least 2 mm, are adjustable.

In this embodiment, the axially movable magnet 27 or the holder 28 is carried indirectly via the associated magnetic element carrier 37, which carries the respective, at least axially movable magnetic element 24 and can preferably itself be positioned variably on the ring element 31 in the circumferential direction.

In a simple and less complex embodiment (see e.g. 10 ) the respective magnetic element 24 or the holder 28 is in or on the magnetic element carrier 37 or its holder 28 by means of a fastening means 83, e.g. B. a screw 83, fastened in such a way that after at least partial loosening of the fastening, e.g. B. by at least partially loosening the screw 83 using a corresponding tool, the magnetic element 24 or the holder 28 is released to the extent that it is axially movable - at least within a relevant adjustment range on the magnetic element carrier 37. The Z. B. fastening means 83 designed as a screw 83 can be reached, for example, through a recess designed as an elongated hole 82 in a bottom area of the holder 28 receiving the magnetic element 24 after the magnetic element 24 has been removed.

Moving or positioning the magnetic element 24 or the holder 28 encompassed by it in the axial direction is preferably carried out - in contrast to, for example, purely manual and / or tool-free movement - via mechanical adjusting means 86, 87, 89, in particular comprising a gear.

Although the adjusting means 86, 87, 89 causing an axial movement can be implemented by any suitable mechanisms or gears, in the illustrated and particularly advantageous case these include a rotational movement - in particular on the input side - into a linear movement - in particular of the magnetic element 24 or of the magnetic element 24 carrying Bracket 28 z. B. directly or indirectly converting gear, in particular an eccentric drive, which causes a rotary movement of an eccentric 86, e.g. B. formed by an eccentrically mounted shaft section 86, in a - here axially extending - linear movement of a carriage 87, which is directly or indirectly connected via contact with the eccentric jacket-side active surface and is mounted in a linearly movable manner in or on the magnetic element carrier 37, e.g. B. a support element 87 that directly or indirectly supports the magnetic element 24 or its holder 28. The eccentric 86 preferably runs with its axis of rotation radially to the cylinder 26 and/or can be actuated directly or indirectly from the cylinder side facing outwards. For this purpose, e.g. B. a shaft 89 encompassing the eccentric 86 or extending outwards in the area of its outward-facing end, an actuation interface 88, e.g. B. an internal polygon 88, which using a corresponding tool, here z. B. a polygonal key, can be actuated, in particular pivotable. As an alternative to the eccentric 86 lying radially with the axis of rotation, a tangential position or one parallel to the tangent is also conceivable, in which case this can then be achieved, for example. B. can be actuated from a side facing in the circumferential direction or from the outside via a corner gear.

An adjustment range in the axial direction, viewed from a central position, is z. B. at least ± 1.0 mm (i.e. a total of at least 2 mm adjustment path), preferably at least ± 1.2 mm, e.g. B. ± 1.5 mm.

In the above embodiment, as an active unit 36 comprising at least one suction element 34, in one embodiment variant the at least one suction element 34 can be axially movable together with the magnetic element 24 on the magnetic element carrier 37. There is a corresponding suction air feedthrough, e.g. B. via relatively movable sealing surfaces or a flexible line.

There may also be deviations in the relative position between the position of individual magnetic elements 24 in the circumferential direction of the cylinder 26 and the target position for their effect on the substrate 02 in the transport direction T, which can have a variety of reasons, such as: B. limited options for rough and/or manual pre-positioning on the cylinder body 29 or in particular on a possibly provided support element 31.

Basically independent of an arrangement of the magnetic element 24 in the above-mentioned structural unit 36 and/or of the design of the above-mentioned fastening device and/or of the above-mentioned adjustability in the axial direction, but preferably in conjunction with one or more of the advantageous embodiments mentioned, are therefore particularly advantageous Execution at least in several, preferably in all axially extending rows of magnetic elements 24 at least one of the magnetic elements 24 independently of at least one further magnetic element 24 of the same row adjustable or movable at least in the circumferential direction directly or indirectly on the cylinder body 29 of the magnetic cylinder 26. Preferably in several, in particular all, lines several, advantageously at least all but one, but particularly advantageously all magnetic elements 24 of the same row are mounted axially movably independently of other magnetic elements 24 of the row.

Instead or in addition to this, in a particularly advantageous embodiment of the cylinder 26 with the magnetic elements 24 arranged in a matrix-like manner, at least two magnetic elements 24 provided one behind the other in the same column are arranged on or in magnetic element carriers 37 which are different from one another and can be positioned independently of one another in the circumferential direction on the cylinder 26, the at least two , in particular all magnetic elements 24 arranged on the respective magnetic element carriers 37 relative to the magnetic element carrier 37 carrying the magnetic element 24 in the circumferential direction within an adjustment range z. B. a total of at least 1 mm, preferably at least 2 mm, are adjustable. This preferably applies to at least two or all magnetic elements 24 of all columns.

Moving or positioning the magnetic element 24 or the holder 28 encompassed by it in the circumferential direction - in contrast to, for example, purely manual and / or tool-free movement - is preferably carried out via mechanical adjusting means 91, 92, 94, in particular comprising a gear.

In this sense, a position or an adjustment movement in the circumferential direction should explicitly include, in addition to a movement on a circular arc-like path, a movement along a rectilinear movement path that runs tangentially or parallel to the tangent on the circumference - over the relevant adjustment range. Since this is usually a very small relevant adjustment range compared to the cylinder diameter, the linear adjustment path generally does not lead to unacceptably large imaging errors.

Although the adjusting means 91, 92, 94 which cause a movement in the circumferential direction can be implemented by any suitable mechanisms or gears, in the illustrated and particularly advantageous case these include a rotational movement - in particular on the input side - into a linear movement - in particular of the magnetic element 24 or the magnetic element 24 supporting bracket 28 z. B. directly or indirectly converting gear, in particular an eccentric drive, which causes a rotary movement of an eccentric 91, e.g. B. formed by an eccentrically mounted shaft section 91, in a linear movement of a carriage 92 which is directly or indirectly connected via a contact with the eccentric jacket-side active surface and is mounted in a linearly movable manner in or on the magnetic element carrier 37, e.g. B. a support element 92 that directly or indirectly supports the magnetic element 24 or its holder 28. In the above sense, the linear movement should be both a straight line, which is preferable because of the effort involved, but also possibly a movement on a circular arc. The eccentric 91 preferably runs with its axis of rotation radially to the cylinder 26 and/or can be actuated from the outward-facing cylinder side. For this purpose, e.g. B. a shaft 94 encompassing the eccentric 91 or extending outwards in the area of its outward-facing end, an actuation interface 93, e.g. B. an internal polygon 93, which using a corresponding tool, here z. B. a polygonal key, can be actuated, in particular pivotable. As an alternative to the eccentric 91 lying radially with the axis of rotation, a tangential position or position parallel to the tangent is also conceivable, in which case this can then be achieved, for example. B. can be actuated from a side facing in the circumferential direction or from the outside via a corner gear.

An adjustment range in the circumferential view, viewed from a central position, is z. B. at least ± 1.0 mm (i.e. a total of at least 2 mm adjustment path), preferably at least ± 1.2 mm, e.g. B. ± 1.5 mm.

In the above embodiment as an active unit 36 comprising at least one suction element 34, in one embodiment variant the at least one suction element 34 can be movable in the circumferential direction together with the magnetic element 24 on the magnetic element carrier 37. There is a corresponding suction air feedthrough, e.g. B. via relatively movable sealing surfaces or a flexible line.

In the event that both an axial and an adjustability of the magnetic elements 24 on the respective magnetic element carrier 37 in the circumferential direction is provided, the two carriages 87; 92 can be arranged directly or indirectly on top of and/or above one another in the manner of a cross guide.

The relevant magnetic element 24 can be positioned in the axial and/or circumferential direction in one of the above-mentioned ways. Design variants in further development, each with a remote-controlled drive means, e.g. B. one the eccentric 86; 91, for example, via an electric motor driving a reduction gear.

Basically independent of an arrangement of the magnetic element 24 in the above-mentioned structural unit 36 and/or of the above-mentioned adjustability in the axial direction and/or the above-mentioned adjustability in the circumferential direction, but preferably in conjunction with one or more of the advantages mentioned adhere to embodiments, a mounting aid 97 already mentioned above is provided, which can be placed on the magnetic element 24 or a magnetic element carrier 37 carrying the magnetic element 24 or a structural unit 36 comprising the magnetic element 24 and through which the clamping fit or a clamping connection between the clamping elements 72 on both sides ; 73 and the support element 31 is detachable. Preferably, the clamping by the assembly aid 97 or a drive means 102 which is included in the assembly means 97 and is in particular manually operable can not only be released and opened in such a way that the magnetic element 24 or the structural unit 36 comprising it can be removed from the support element 31, but also in an intermediate position in the strength or degree of opening of the clamping can be released to such an extent that the magnetic element 24 or the structural unit 36 is not yet completely free, but can be positioned overall in the circumferential direction on the support element 31. A degree of opening can be adjusted just so that there is still contact between the clamping elements 72; 73 exists, but positioning is possible when overcoming any minor frictional forces that may still exist. For this purpose, the actuating arms 98 are preferably continuously operated by the drive means 102 over an adjustment path between a clamping position in which the clamping elements 72; 73 develop the full clamping force on the support element 31, and can be positioned in a position in which the clamping is released to such an extent that the magnetic element 24 or the magnetic element carrier 37 carrying it can be removed from the support element 31.

In order to be able to achieve simple actuation from the outside of the cylinder and/or in particular also such a defined opening, the assembly aid 97 comprises, in addition to a base 104, which can be placed on the relevant magnetic element 24 or on the relevant structural unit 36, actuation arms on both end faces 98, which extend in the radial direction to both end faces of the magnetic element 24 or the structural unit 36 and are in operative connection with the respective end-side clamping element(s) 72; 73 can be brought or will be brought to operate them. Furthermore, the assembly aid 97 includes the above. Drive means 102, in particular an actuator 102, through which the actuating arms 98 can be moved into a first position in which they - e.g. B. contrary to the above. Spring force - the clamping elements 72; 73 open so far that the magnetic element 24 or the structural unit 36 can be attached to the support element 31 or can be completely detached from it, up to a second position in which the clamping elements 72; 73 develop the full clamping force on the support element 31 without the actuating arms 98 absorbing any force that is opposite to the clamping force. Preferably, all positions in between can be adjusted by the drive.

In the above Formation of the clamping elements 72; 73 as two-armed levers 72; 73, the actuating arms 98 each engage directly or indirectly on the lever arm located further out and are directed towards each other by the drive means 102 to open the clamping connection, i.e. H. each in the direction of the support element 31, and can be moved apart again to close the clamp connection. For the above mentioned Case of two clamping elements 72 arranged next to each other; 73 are these z. B. via a coupling member 96 that connects the two lever arms located further out, e.g. B. a connecting axis 96 mounted in both outer lever arms, coupled to one another, which corresponds to the respective actuating arm 98 z. B. also serves as a point of attack. In the case of a single clamping element 72; 73, the respective actuating arm 98 can act directly or indirectly on the lever arm of the relevant clamping element 72; 73 work.

In principle, any drive mechanism is conceivable as the drive means 102, through which the two opposing actuating arms 98 can be moved toward and away from each other in the above sense. However, a drive mechanism with a self-locking gear is preferred here, as is the case, for example. B. is given by a screw drive. The drive means 102 thus includes z. B. a first part 99 carrying the actuating arm 98 on one side, e.g. B. a first bushing 99, and a second drive part 99, which is mounted in a rotationally fixed but axially movable manner against the first part 99 and carries the actuating arm 98 on the other side, e.g. B. second socket 101, as well as an internally formed screw drive, through which a not shown, and z. B. via a manual actuation interface 103, such as a rotary handle 103, rotatable threaded spindle on the one hand and an internal thread on the other of the two parts 99; 101 of the drive means 102, the parts carrying the actuating arms 98 can be moved apart and towards each other.

In the embodiment of the magnetic cylinder 26 with variable, in particular ring-like, support elements 31 in their axial position, these axially positionable support or ring elements 31 can basically be fastened in any way which requires a releasable connection between the respective support element 31 and the cylinder inner body 32 and an axial relative movement enabled. In particular, a connection is particularly advantageous in which, in the area of suction air passing through, line interface pairs consisting of line interfaces 46 on the shaft 32 and cooperating line interfaces 49 on the downstream inner facing wall 52 of the ring element 31 these line interfaces 46; 49 surrounding surfaces are pressed together by the connection in such a way that they form a sealing surface that is largely closed against the passage of suction air.

Basically independent of an arrangement of the magnetic element 24 in the above-mentioned manner. Unit 36 and/or one of the above. Adjustability in the axial direction and/or one of the above. Adjustability in the circumferential direction and/or from one of the above-mentioned Clamping device for clamping the magnetic elements 24 or holders 29 or structural units 36, but preferably in conjunction with one or more of the advantageous embodiments mentioned, in a preferred embodiment for fastening ring elements 31 a clamping device is provided for fastening, through which the support - or ring element 31 can be clamped onto the cylinder inner body 32, which is designed in particular as a shaft 32, so that the above-mentioned. Sealing surface can be formed. It is helpful to design the ring element 31, which is actually designed like a circular ring segment, such that an inner diameter of the ring element 31 in the segment angle range is slightly, e.g. B. 2 to 50 µm, in particular 5 to 20 µm larger than an outer diameter of the cylinder inner body 32 designed as a shaft 32 in the interacting angular range.

In the case of a cylinder 26, which has already been explained, among other things, with magnetic elements 24 arranged in columns, the magnetic elements 24 of several or all columns are provided as a respective group on or on a respective support element 31. The respective support element 31 is here explicitly designed as a ring segment-like, i.e. H. ring-like support element 31 which is interrupted over an angular range and has a leading and trailing end 106 with respect to a production direction of rotation D; 107 on. The production direction of rotation D is defined, for example, by the arrangement of a gripper strip already mentioned above, which has grippers 33 which open and close during operation to pick up a substrate sheet 02 at the leading end 106 of the segment-like ring element 31. The respective support element 31 is detachably arranged on the cylinder inner body 32 enclosed by the cylinder 26 and its axial position can be varied in the released state. In order to fasten the support element 31 in a desired position on the cylinder inner body 32, with the support element 31 mounted on the cylinder inner body 32 in the area between the leading and trailing ends 106; 107 of the ring segment-like support element 31 on the cylinder inner body 32, a clamping device 108 is provided, through which the two ends 106; spaced apart in the circumferential direction; 107 can be acted upon by a force directed towards one another in the circumferential direction via adjusting means 109 encompassed by the tensioning device 108. As a result, the segment-like ring element 31 is pressed tightly against the lateral surface of the shaft 32 via, if necessary, a slight elastic deformation, so that the above-mentioned Sealing surface is created.

The clamping device 108 engages in particular at the two ends 106; 107 of the support element 31 and can be varied in the circumferential direction via the adjusting means 109 included in the clamping device 108 in its length, which is effective for the two-sided attack.

Preferably, the tensioning device 108 comprises a tensioning bar 111, which is in the area between the leading and trailing ends 106; 107 of the support element 31 is arranged on the circumference of the cylinder inner body 32 and is secured at least on one side against a relative movement to the cylinder inner body 32 in the circumferential direction. Preferably, however, the clamping strip 111 and the cylinder inner body 32 are secured against rotation in the circumferential direction by pairs of stops effective in both directions of rotation. Such a security can be realized, for example, by corresponding deviations of the inner circumferential line of the ring element 31 and the outer circumferential line of the cylinder inner body 32, which act as stop pairs. In an advantageous embodiment shown here, however, such a relative anti-rotation device is provided by a so-called fitting element 112, also commonly referred to as a feather key 112, which z. B. anchored in the lateral surface of the cylinder inner body 32 and fits snugly with a recess, in particular a groove, in the clamping bar 111 or vice versa. A fitting element 112 with a correspondingly interacting recess is advantageous in such a way that a simple radial fitting of the cylinder inner body 32 with the clamping strip 111 is possible. In addition to anti-twist protection, fasteners not shown, e.g. B. screws can be provided, through which the clamping bar 111 can be fastened radially on the cylinder inner body 32.

The tensioning bar 111 is then preferably in a relaxed state, i.e. H. Force-free state of the tensioning device 108 immediately or after loosening the above. Fastening means can be removed from the cylinder inner body 32 when the support element 31 still remains on the cylinder inner body 32 or can be used on the cylinder inner body 32 in the area of the interruption when the ring element 31 is already positioned on the cylinder inner body 32.

In an advantageous embodiment, the clamping device 108 engages at one of the ends 107; 106, preferably at the trailing end 107, statically, ie in a fixed circumferential relative position between the clamping bar 111 and the relevant end 107; 106, on and at the other, preferably the leading end 106, the distance can be changed via the adjusting means 109, ie in a variable circumferential relative position between the clamping bar 111 and the relevant other end 106; 107. This means e.g. B. that with the setting the point of attack and thus the end in question 106; 107 can be moved closer to the clamping bar 111 or - e.g. B. by the elastic restoring force in the ring element 31 - must be returned to the starting position.

For static attacking, e.g. B. a positive connection effective in the circumferential direction via a between the relevant end 107; 106 and the clamping bar 111 effective stop pair provided. The pair of stops 106, 107 is z. B. by opposing surfaces of a hook-like projection on the clamping bar 111 and a hook-like projection 117 which engages in reverse, e.g. B. formed as a hanging edge 117 at the end 107 of the ring element 31.

In a preferred embodiment, a place of engagement via the adjusting means 109 is at the relevant end 106; 107 viewed in the circumferential direction straight or at least with no more than 5 ° deviation at a point at which a tangent on the circumference of the cylinder inner body 32 runs parallel to the adjusting direction of the adjusting means 109. In the small adjustment range present here, this makes it possible for the end 106; which is tightened by the adjusting means 109; 107 is subjected to a force essentially tangentially and as a result there is no radial deformation, which may occur due to a direction of force deviating from the tangent.

Although in principle it can also be implemented in another way, the adjusting means 109 are preferably supported by a clamping bar 111 and z. B. manually operated screw drive 113, 114, e.g. B. a threaded rod 113, in particular screw 113, rotatably mounted in the clamping bar 111, and a corresponding thread 114, e.g. B.- Threaded bushing 114, formed directly in the end region of the ring element 31 or preferably in a clamping means 116 which engages on the ring element 31 and can be changed in position via the screw drive 113, 114 in the adjusting direction of the screw drive 113, 114, the clamping means 116 having a pair of stops acting in the circumferential direction the relevant end 106 is designed and arranged to cooperate. The pair of stops is z. B. by opposing surfaces of a tensioning means 116 designed as a pull bar 116 and a hook-like projection 118 receiving the pull bar 116, e.g. B. as a hanging edge 118, formed on the ring element 31.

In an advantageous development, the tension bar 116, viewed in a cross section perpendicular to the cylinder axis, is immersed with at least part of it in a recess 122 or recess 122 in the tension bar 111 that corresponds in shape and cross section in such a way that a movement of the tension bar 116 guided through the recess 122 is guaranteed along the positioning direction.

In principle, for each ring element 31 to be fastened, a respective clamping bar 111 and/or a respective assigned clamping device 116 can be provided. In a preferred embodiment, however, there is a clamping bar 111 which, viewed in the axial direction of the cylinder 26, extends over several or all of the support elements 31 arranged on the inner cylinder body 32 and/or a tension bar 111, viewed in the axial direction of the cylinder 26, over several or all of the support elements arranged on the inner cylinder body 32 31 extending clamping means 116 is provided. There is no longer any need for a fixed numerical or spatial assignment of adjusting means 109 or screw drives 113, 114 to be assigned to a ring element 31. The fastening device can be retained, regardless of the number and position of the ring elements 31, with which a continuous or possibly divided Clamping device 108 cooperates to clamp it. In particular, one of the above would also be Clamping device 108 without pull bar 116, i.e. H. with adjusting means 109 engaging directly in the ring element 31, less suitable for continuous positioning work, since the possible positions depend on the hole spacing for the threaded rods 113.

The clamping bar 111 can be arranged and designed in such a way that it simultaneously forms the base support of a one-part or multi-part gripper bar. For example, bearings 121 carrying a gripper shaft 119 are arranged on the clamping bar 111 forming the base support.

In a preferred embodiment, such a cylinder 26 is part of the above-mentioned. Machine 01 and/or is particularly advantageous in connection with one or more aspects for the adjustability of individual magnetic elements 24 on respective magnetic element carriers 37 in the axial and/or circumferential direction and/or for the training of the above. Active units 36 with respective magnet and suction element 24; 34 and/or the clamping of individual magnetic elements 24 or their holders 28 or magnetic element carriers 37 on the ring element 31.

Reference symbol list

01

Machine for producing optically variable image elements, printing machine, security printing machine

02

Substrate, printing material, printing material section, printing material sheet, substrate sheet

03

Image element

04

Application device, printing unit, flexographic printing unit, screen printing unit

05

-

06

Coating materials, printing ink, varnish

07

Device for aligning magnetic particles in image elements, aligning device

08

Print image element

09

Benefit, security, banknote

10

-

11

pressure point

12

Conveyor device, transport cylinder

13

Substrate template, sheet feeder

14

Printing cylinders, forme cylinders, screen printing cylinders

15

-

16

Device for generating optically variable picture elements

17

Impression cylinder

18

Print element, print subject

19

Drying and/or curing device, radiation dryer, UV radiation dryer, UV dryer, UV LED dryer

20

-

21

Conveyor device, gripper circulation conveyor, chain gripper system

22

Product pickup, stack delivery

23

Dryer, radiation dryer

24

Active element, element, magnetic element

25

-

26

Alignment device, cylinder, magnetic cylinder

27

magnet

28

Bracket, base

29

Cylinder body

30

-

31

Support element, ring element

32

Cylinder inner body, shaft

33

Holding means, gripper

34

Suction element

35

-

36

Structural unit, active unit, magnetic unit

37

Magnetic element carrier

38

Housing

39

Suction air duct

40

-

41

Cover element

42

Suction opening

43

Line interface, recess, chamber

44

lateral surface (32)

45

-

46

Line interface, suction air opening (32)

47

Implementation, drilling

48

Duct, suction air duct

49

Line interface, recess

50

-

51

Line interface, recess

52

Wall

53

channel

54

Implementation, drilling

55

-

56

Wall

57

Closure means, valve, sleeve

58

Closure means, valve, sleeve

59

Tool, polygon wrench

60

-

61

recess

62

wall

63

Actuation interface, internal polygon, internal peripheral section

64

Support disk

65

-

66

Support element

67

support surface, surface

68

Support surface

69

Support disk

70

-

71

Support plate

72

Clamping element, clamping lever, lever

73

Clamping element, clamping lever, lever

74

stop surface

75

-

76

Nut

77

stop surface

78

Nut

79

Spring element, compression spring

80

-

81

Axis, pivot axis

82

Long hole

83

Fasteners, screw

84

Line

85

-

86

Eccentric, shaft section

87

Carriage, support element

88

Actuation interface, internal polygon

89

Wave

90

-

91

Eccentric, shaft section

92

Carriage, support element

93

Actuation interface, internal polygon

94

Wave

95

-

96

Coupling link, connecting axis

97

Assembly aids

98

Actuation arm

99

Part, first, socket

100

-

101

part, second, socket

102

Drive means, actuator

103

Operating interface, rotary handle

104

Base

105

-

106

End, leading up (31)

107

End, trailing (31)

108

Tensioning device

109

adjusting means

110

-

111

Tension bar

112

Fitting element, feather key

113

Threaded rod, screw

114

Thread, threaded bushing

115

-

116

Clamping device, pull bar

117

Projection, hanging edge

118

Projection, hanging edge

119

gripper shaft

120

-

121

camp

122

recess, recess

D

Direction of production rotation

P

Particles, pigment particles

T

Transport direction

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2114678 B1 [0002]
• US 2011/0168088 A1 [0003]
• CN 103192591 A [0004]
• WO 2014/037221 A1 [0005]

Claims (15)

Cylinder (26), which in the area of its outer circumference, viewed in the axial direction, comprises a number m of columns, each with a number n of elements (24) which provide magnetic fields arranged one behind the other in the circumferential direction, or magnetic elements (24) for short, with several or all of them the magnetic elements (24) of several or all columns are arranged as a respective group on or on a respective ring segment-like support element (31) which is interrupted over an angular range and has a leading and a trailing end (106; 107) with respect to a production direction of rotation (D). , and wherein the respective support element (31) is detachably arranged on an inner cylinder body (32) enclosed by the cylinder (26) and its axial position can be varied in the released state, characterized in that when the support element (31) is mounted on the cylinder inner body (32) In the area between the leading and trailing ends (106; 107) of the ring segment-like support element (31) on the cylinder inner body (32), a clamping device (108) is provided, through which the two ends (106; 107) of the support element (31) can be acted upon by a force directed towards one another in the circumferential direction via adjusting means (109) encompassed by the clamping device (108). Cylinder after Claim 1 , characterized in that the clamping device (108) engages on the two ends (106; 107) of the support element (31) and its length, which is effective for engaging on both sides, can be varied in the circumferential direction via the adjusting means (109) encompassed by the clamping device (108). is. Cylinder after Claim 1 or 2 , characterized in that the tensioning device (108) comprises a tensioning bar (111), which is arranged in the area between the leading and trailing ends (106; 107) of the support element (31) on the circumference of the cylinder inner body (32) and at least to one side is secured against relative movement to the cylinder inner body (32) in the circumferential direction. Cylinder after Claim 3 , characterized in that the clamping bar (111) and the cylinder inner body (32) are secured against rotation in the circumferential direction by stop pairs effective in both directions of rotation and/or that the clamping bar (111) is directly in the relaxed, i.e. force-free, state of the clamping device (108). or can be removed from the cylinder inner body (32) after releasing an additional, radially effective connection with the support element (31) still remaining on the cylinder inner body (32). Cylinder after Claim 3 or 4 , characterized in that the clamping device (108) engages statically at one of the ends (107; 106), ie in a fixed circumferential relative position between the clamping bar (111) and the relevant end (106; 107), and at the other end via the adjusting means (109) variable in distance, ie in a variable circumferential relative position between the clamping bar and the relevant other end (106; 107). Cylinder after Claim 3 or 4 , characterized in that for static engagement, a positive connection effective in the circumferential direction is provided between the relevant end (107; 106) and the clamping bar (111). Cylinder after Claim 5 or 6 , characterized in that a location of engagement via the adjusting means (106; 107) at the relevant end (106; 107) viewed in the circumferential direction is straight or at least with no more than 5 ° deviation at a point at which one is on the circumference of the inner cylinder body (32) adjacent tangent to the adjusting direction of the adjusting means (109) runs parallel. Cylinder after Claim 5 , 6 or 7 , characterized in that the variable distance engagement is provided via the adjusting means (109) at the leading end (106). Cylinder after Claim 1 , 2 , 3 , 4 , 5 , 6 or 7 , characterized in that the adjusting means (109) are provided by a screw drive (113, 114) supported on the clamping bar (111) and a clamping means (116) which can be changed in position via the screw drive (113, 114) in the adjusting direction of the screw drive (113, 114). are formed, the clamping means (116) being designed and arranged to cooperate with the relevant end (106) via a pair of stops (117, 118) effective in the circumferential direction. Cylinder after Claim 9 , characterized in that the clamping bar (111) and/or the clamping means (116), viewed in the axial direction of the cylinder (26), extends in cooperation with several or all of the support elements (31) arranged on the cylinder inner body (32). Cylinder after Claim 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8th , 9 or 10 , characterized in that several or all of the magnetic elements (24) provided one behind the other in the several or all of the columns are on or in different ones, in the circumferential direction on the cylinder (26) on the relevant support element (31) independently of one another nander positionable magnetic element carriers (37) are arranged. Cylinder after Claim 11 , characterized in that the majority or all of the magnetic elements (24) arranged on the relevant magnetic element carriers (37) relative to the magnetic element carrier (37) carrying the respective magnetic element (24) within an adjustment range in the circumferential direction and / or within an adjustment range in the axial direction are stored adjustable. Cylinder after Claim 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8th , 9 , 10 , 11 or 12 , characterized in that in the several or all of the columns of magnetic elements (24), several or all of the magnetic elements (24) arranged one behind the other are combined with at least one assigned suction element (34) in respective structural units (36) as active units (36) and as such, can be positioned overall and independently of all other such active units (36) in the circumferential direction on the relevant support element (31) and/or can be detached from the cylinder (26). Cylinder after Claim 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8th , 9 , 10 , 11 , 12 or 13 , characterized in that several or all of the magnetic elements (24) of a group mounted on the respective several or all support elements (31) can be positioned independently of one another in the circumferential direction on the respective support element (31), and that the magnetic elements (24) or the respective Holders (28) accommodating magnetic elements (24) or magnetic element carriers (37) carrying the respective magnetic elements (24), viewed in the axial direction of the cylinder (26), each comprise at least one clamping element (72; 73) on both sides, the effective ends of which each have one in the assembled state on the respective end face of the ring-like support element (31) extending in the circumferential direction and directed into the interior of the cylinder (26) and/or a radial removal of the magnetic element (24) or the holder (27) or the magnetic element carrier (37) by interacting with engages under the stop surface (74; 77) which counteracts the clamping element (72; 73) which is in the clamping position. Machine (01) for producing optically variable image elements (03) on a substrate (02), comprising a substrate template (13), at least one printing unit (04), through which substrate (02) is guided on a transport path through the machine (01). is and/or can be printed on a first side in a matrix-like manner with panels (09) of a number m of columns and a number n of rows, a product holder (22), through which processed substrate (02) can be combined in containers, and an im Substrate path between printing unit (04) and product holder (22) provided alignment device (07) with a magnetic cylinder (26) for aligning magnetic or magnetizable particles (P), characterized by the design of the magnetic cylinder (26) according to a cylinder (26) according to one the Claims 1 until 14 .

Images