EP4496709A1 - Vorrichtung zum ausrichten von magnetischen oder magnetisierbaren partikeln sowie maschine zur erzeugung optisch variabler bildelemente - Google Patents
Vorrichtung zum ausrichten von magnetischen oder magnetisierbaren partikeln sowie maschine zur erzeugung optisch variabler bildelementeInfo
- Publication number
- EP4496709A1 EP4496709A1 EP23754711.2A EP23754711A EP4496709A1 EP 4496709 A1 EP4496709 A1 EP 4496709A1 EP 23754711 A EP23754711 A EP 23754711A EP 4496709 A1 EP4496709 A1 EP 4496709A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnetic
- cylinder
- substrate
- alignment device
- transport path
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/18—Inking arrangements or devices for inking selected parts of printing formes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F11/00—Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination
- B41F11/02—Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination for securities
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/08—Cylinders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
- B41F19/001—Apparatus or machines for carrying out printing operations combined with other operations with means for coating or laminating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
- B41F19/002—Apparatus or machines for carrying out printing operations combined with other operations with means for applying specific material other than ink
- B41F19/005—Apparatus or machines for carrying out printing operations combined with other operations with means for applying specific material other than ink with means for applying metallic, conductive or chargeable material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
Definitions
- the invention relates to a device for aligning magnetic or magnetizable particles and to a machine for generating optically variable image elements according to claim 1 or 12.
- WO 2022/069107 A1 discloses a security machine for generating optically variable image elements on a substrate, which comprises a magnetic cylinder and, in one embodiment, both a stationary alignment device arranged upstream of the magnetic cylinder in the transport path and a stationary alignment device associated with the magnetic cylinder, which can be pivoted away from the transport path into a setup position.
- WO 2022/189098 A1 discloses a security machine with several printing units and several downstream magnetic cylinders, each of which is assigned a pre-alignment device and a simultaneous alignment device.
- the invention is based on the object of creating an improved device for aligning magnetic or magnetizable particles and a machine for generating optically variable image elements.
- a very particular advantage of the solution according to the invention is that a positioning of an operationally stationary alignment device can be carried out by means of magnetic elements encompassed by it, without having to take accessibility into account and/or without having to maintain a larger free space next to or above it, as would be the case, for example, when pivoting about a fixed axis.
- a design of the device for pre-orientation is particularly advantageous. After the application of printing ink with magnetic or magnetizable particles, the particles are more or less randomly arranged in the color matrix. By initially aligning them homogeneously, a background can be created for subsequent imaging alignment that offers a higher contrast.
- the device for aligning is designed in such a way that a carrier carrying the magnetic elements is mounted on both sides in or on at least one guide and is located in or on the guide together with Magnetic elements - in particular guided - can be moved along a movement path, ie by a translational movement, in particular a movement as a whole, from the working position into a setup position - in particular further away from the transport path.
- the guides are provided in or on side plates, which in turn are detachably arranged on frame walls of a frame carrying the alignment device, such guides can be provided individually in the side plates without having to manufacture the frames individually.
- such alignment devices can then be used or retrofitted at different locations and in different numbers using simple means, without having to provide a large amount of space for sweeping swivel movements. This is particularly advantageous for machines or machine parts in which, for example, no linear conveyor lines with sufficient space are provided, but substrate transport takes place solely through cylinder-to-cylinder transfer.
- Fig. 1 shows an embodiment of a machine, e.g. a security printing machine, for producing optically variable image elements on a substrate
- Fig. 2 is a schematic representation of a substrate printed in printing elements with optically variable coating agent, wherein on the left side, Fig. 2 a), an alignment with only the imaging alignment device and on the right side, Fig. 2 b), an alignment using at least one further alignment causing a pre-orientation;
- Fig. 3 is an oblique view of an embodiment for a magnetic cylinder
- Fig. 4 is a sectional view of a cylinder with cooperating alignment device
- Fig. 5 a plan view a) of an alignment device arranged in a frame and a side view b) of a side plate for receiving the alignment device from the inside;
- Fig. 6 is an oblique view of an alignment device held in side plates
- Fig. 7 is a partial perspective view from below of a connection of the alignment device to a side plate having guides;
- Fig. 8 shows an embodiment of a machine, e.g. a security printing machine, with several pre-alignment and several simultaneous alignment devices.
- a machine 01 that processes and/or processes web-shaped or in particular sheet-shaped substrate 02, in particular a security machine 01, e.g. a printing machine 01, in particular a security printing machine 01, preferably for producing optically variable image elements 03 on a substrate 02, e.g. a particularly sheet-shaped printing material 02, comprises, for example, an application device 04, e.g. a printing unit 04, through which optically variable coating agent 06, e.g. optically variable printing ink 06 or varnish 06, at least one application point, e.g. printing point 11, on at least one first side of the substrate 02, e.g.
- 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 e.g.
- This device 07 is also referred to below as alignment device 07 or, since it creates an image for the optically variable pattern or motif through defined alignment of the particles P, also as imaging alignment device 07.
- An application of coating agent 06 containing particles P and a subsequent imaging alignment is shown, for example, in Fig. 2 on the left-hand side (Fig. 2 a)) schematically using the representation of the number I on the alignment of previously randomly oriented particles P.
- the Roman numeral I designates a state I in which the coating agent 06 is applied and is randomly oriented and the number III designates a state III in which an imaging alignment has taken place.
- the printed image elements 08 made of variable coating agent 06 applied to the substrate 02 by the application device 04 before treatment by the alignment device 07 can correspond in size and position to the optically variable image elements 03 to be produced or can possibly be larger than these, possibly even extending over the surface of several panels 09.
- an optically variable image element 03 is not produced on the entire surface coated with optically variable coating agent 06 by alignment.
- the particles P responsible for the optical variability contained in the coating agent 06 are magnetic or magnetizable, non-spherical particles P, e.g. pigment particles P, hereinafter also referred to as magnetic flakes.
- the machine 01 is preferably designed for producing blanks 09, e.g. securities 09, in particular banknotes 09. This should also include in particular the production of intermediate securities products, e.g. the production of printing material 02, in particular in the form of web- or sheet-shaped printing material sections 02, in particular printing material sheets 02, with printed images of several securities 09.
- the substrate 02 can be formed by paper - e.g.
- paper based on or at least containing cellulose or preferably cotton fibers - by plastic polymer or by a hybrid product made thereof. It can be uncoated before coating in the above-mentioned application device 04 or it can already have been coated; it can be unprinted or it can already have been printed once or multiple times in one or more upstream processes or it can have been mechanically processed in some other way.
- a printing material section 02 formed by a longitudinal section of web-shaped substrate 02 or a sheet of a sheet-shaped substrate 02, a plurality of blanks 09, e.g.
- banknotes 09 to be produced or their printed images are preferably arranged in a matrix-like manner in rows running transversely to the transport direction T next to one another and in columns running in the transport direction T one behind the other or are to be arranged in the course of the processing of the substrate 02 (indicated e.g. in Fig. 2).
- the machine 01 designed as a printing press 01 can in principle comprise one or more printing units 04 of any printing process.
- 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, by means of which the optically variable coating agent 06 is or can be applied to a first side of the printing material 02.
- a greater layer thickness can be applied, for example, compared to other printing processes.
- first side of the substrate 02 or the printing material 02 is chosen arbitrarily and is intended to designate the side of the printing material 02 on which the optically variable coating agent to be treated downstream by the alignment device 07 is applied.
- Coating agent 06 is or has been or can be applied.
- the printing press 01 comprises a substrate template 13, preferably designed as a sheet feeder 13, from which the substrate 02, e.g. designed as a sheet-shaped printing material 02 - possibly via further printing or processing units - is or can be fed to the at least one printing unit 04 applying the optically variable coating agent 06, e.g. flexographic or preferably screen printing unit 04, which forms a printing point 11 for printing, e.g. a first side of the printing material 02 between a printing unit cylinder 14, in particular a forme cylinder 14, e.g. a screen printing cylinder 14, and a common cylinder 17, e.g. impression cylinder 17 (see e.g. Fig. 1).
- the substrate template 13 preferably designed as a sheet feeder 13 from which the substrate 02, e.g. designed as a sheet-shaped printing material 02 - possibly via further printing or processing units - is or can be fed to the at least one printing unit 04 applying the optically variable coating agent 06, e.g. flexographic or preferably screen printing unit 04,
- the printing unit 04 preferably comprises a forme cylinder 14 as an imaging cylinder with a multiplicity of, in particular similar and/or identical, imaging printing elements, hereinafter also referred to as printing subjects, or, in particular similar and/or identical, groups of imaging printing elements or printing subjects on the circumference, which are arranged in a matrix-like manner on a circumferential length corresponding to the length of the printing image in several, e.g. a number, e.g. from four to eight, in particular five to seven, e.g. six, columns spaced apart from one another transversely to the transport direction T and on a cylinder width corresponding to the width of the printing image in several rows spaced apart from one another in the transport direction T.
- these printing subjects are designed in the form of relief reliefs and in the preferred case of a printing unit 04 operating according to screen printing, in the form of print-through stencils.
- the printing material 02 is fed to the alignment device 07 via conveying means, e.g. one or more conveying devices 12 designed as cylinders 12, e.g. as transport cylinders 12.
- conveying means e.g. one or more conveying devices 12 designed as cylinders 12, e.g. as transport cylinders 12.
- the conveying means could be formed by one or more positively driven and/or non-driven rollers.
- the printing material 02 can be fed directly or via further conveying means, e.g. further transport cylinders 12, to a further conveying device 21 and can be fed by 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, a stack delivery 22.
- sheet-conveying means e.g.
- a conveying device 21 designed, for example, as a gripper circulating conveyor 21, in particular a chain gripper system 21, are provided as conveying means, by means of which the printing material sheets 02 are taken over from the transport path section of the alignment device 07 via, if necessary, one or more further transport cylinders and fed, for example, to the stack delivery 22.
- At least one drying device with one or more dryers 23 directed at the first side of the printing material 02 e.g. radiation dryers 23, and optionally a cooling device (not shown), e.g. cooling roller, can be provided on the transport path leading away from the alignment device 07.
- an inspection device 15, 25, e.g. a sensor device 25 interacting with a transport cylinder 15, in particular an inspection cylinder 15 designed in the manner of a suction drum 15, e.g. a camera 25, in particular a line camera 25, can be provided on the transport path between the alignment device 07 and the stack delivery 22.
- the printing unit 04 and the alignment device 07 can be structurally combined, e.g. in the form of a module, to form a device 16 for generating optically variable image elements.
- a device 16 for generating optically variable image elements.
- Such a device can be used, for example, in a Further development can be provided several times in succession in the machine 01.
- the device 16 with input and output side interfaces to corresponding interfaces of a conveyor system continuing upstream and downstream is or can be inserted into the transport path of the machine 01 to be equipped.
- two or more such devices 16 are provided, in particular as modules.
- the alignment device 07 described in detail below is basically arbitrary in its designs, 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. for forming the optically variable effect in the previously - e.g. B. in the form of print 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 is or can be brought into operative connection in a defined manner from an input region into which the substrate 02 to be treated and having optically variable coating agent 06 on its first side is fed or can be fed, with an alignment device 26 which comprises elements 24 providing magnetic fields as active elements 24, in short magnetic elements 24, preferably in such a way that the magnetic elements 24 of the alignment device 26 serving for image-forming 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, in short magnetic cylinder 26, which has the arrangement of magnetic elements 24 on the circumference and via which the printing material 02 is guided from an input area towards a Output area of the alignment device 07 is guided or conveyed. It is mounted in a one- or multi-part frame and can rotate on both sides.
- the magnetic elements 24 can be formed directly by single-part or multi-part magnets 27 themselves, indicated by dashed lines in Fig. 3 as an example, or can preferably comprise one or more magnets 27 which are arranged - preferably detachably - in or on a holder, e.g. on or in a base.
- Magnets 27 are generally understood here to be magnetically effective devices which permanently or switchably create a magnetic field at least towards the side of the transport path - in particular one which is sufficiently strong 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.
- magnet 27 is also understood to mean a plurality of magnets 27 assigned to the same magnetic element 24 and which as a whole form a magnetic unit, unless explicitly stated otherwise.
- the magnetic element 24 is also intended to include designs with a plurality of one-part or multi-part magnets 27 contained within the magnetic element 24 and spaced apart from one another, as can be used, for example, in the case where the same panel 09 is to be subjected to a respective magnetic field at two different points.
- Such a magnet 27 or an arrangement of a plurality of magnets 27 of a same magnetic element 24 can be accommodated in a housing of the magnetic element 24, which is, for example, detachably arranged in or on a holder.
- two such magnetic cylinders 26 can be provided in the transport path, which are located on the same or on different sides of a Transport path to the substrate 02 to be conveyed.
- the imaging alignment device 07 is assigned a drying and/or curing device 19, e.g. a radiation dryer 19, in particular UV radiation dryer 19, or 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 interacts with the magnetic cylinder 26.
- a drying and/or curing device 19 e.g. a radiation dryer 19, in particular UV radiation dryer 19, or 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 interacts with the magnetic cylinder 26.
- the drying and/or curing device 19 is arranged on the circumference of the magnetic cylinder 26 and/or directed towards a circumferential section of the respective magnetic cylinder 26 lying in the transport path.
- the or one of the magnetic cylinders 26 is preferably arranged on the second side of the substrate 02 to be conveyed in the transport path thereof, so that its first side, which is coated inline with optically variable coating agent 06 in particular upstream, faces outwards when passing the magnetic cylinder 26, in particular when being transported over the magnetic cylinder 26.
- the magnetic cylinder 26 comprises a single-part or preferably multi-part cylinder body, on or on which the magnetic elements 24 are arranged, preferably detachably.
- the single-part or preferably multi-part cylinder body can be or is mounted rotatably in a frame.
- the term cylinder body is intended to refer to the part of the unequipped cylinder 26 and can include both closed structures, i.e. with a more or less closed cylinder surface, and open structures, i.e. scaffolding or frame-like structures such as the example shown in Fig. 3.
- the magnetic cylinder 26 has in the region of the side facing the substrate path, e.g. in the region of the outer circumference, in particular in the region of an outer cylindrical envelope surface of the cylinder body, the plurality of magnetic elements 24 which Orientation of at least a portion of the magnetic or magnetizable particles P of the coating agent 06 applied to the passing printing substrate 02.
- a plurality of columns or sheets in particular a number m (m e N > 1) corresponding to the number of columns on the printing material section 02, are provided on the cylinder 26 when viewed in the axial direction.
- Groups each with a plurality of, in particular a number n (n e N > 1) of axially parallel lines corresponding to the number of lines of blanks 09 on the printing material section 02 to be treated, or magnetic elements 24 arranged one behind the other in a column or group as viewed in the transport direction T of the substrate 02 and/or in the circumferential direction of the cylinder 26 are provided or arranged in a matrix-like manner, i.e. a number of n x m, in other words n times m; with n, m e N, magnetic elements 24 are provided in a matrix-like manner on the outer circumference.
- an alignment or orientation of particles P in the area of the image elements 03 provided on the blank 09 can be effected by means of the magnetic elements 24, in this case for example through the substrate 02.
- the number m of columns or groups is, for example, four to eight, in particular five to seven, e.g. six and/or the number n of magnetic elements 24 in a column or group is, for example, two to twelve, advantageously five to ten.
- the magnetic cylinder 26 or its cylinder body 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 above-mentioned limits - can be varied. to adapt them to different requirements.
- the magnetic elements 24 - preferably in or on a corresponding holder together with the latter - are arranged or can be arranged on the cylinder 26 in such a detachable manner 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 positioned on the circumference of the cylinder 26 in the axial and/or circumferential direction.
- magnetic elements 24 can be arranged and mounted on or in a cylinder 26 in such a way that they are mounted on or in the single- or multi-part cylinder body in a variable manner, at least relative to other magnetic elements 24 in the same column or group of magnetic elements 24, in their axial position relative to the same.
- This can be achieved, for example, by means of axially extending guides on the circumference of the cylinder body, in or on which the relevant magnetic elements 24 are mounted directly or indirectly and can be brought into different axial positions.
- Such guides could in principle be provided individually for individual magnetic elements 24 in a row, but possibly also continuously for several or all magnetic elements 24 in the same row. In this case, the guides could be provided on the above-mentioned axially extending support elements that support all magnetic elements 24 in the same row.
- the magnetic elements 24 can be arranged or can be arranged - directly or indirectly - in or on several, e.g. a number m of e.g. four to eight, in particular five to seven, e.g. six, axially spaced apart and preferably partially or entirely positionable in the axial direction on an inner cylinder body 32, in particular an axially extending cylinder shaft 32, shaft 32, preferably ring-like support elements 31, e.g. here ring elements 31, wherein in or on these ring elements 31 in turn several, e.g. 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 entirely positionable in the circumferential direction (see e.g. Fig. 3).
- a number m of e.g. four to eight in particular five to seven, e.g. six, axially spaced apart and preferably partially or entirely positionable in the axial direction on an inner cylinder body 32,
- the magnetic cylinder 26 can be designed without any holding means acting on the substrate 02 and, for example, with ring elements 31 that are closed in the circumferential direction.
- holding means 33 e.g. grippers 33 of a so-called gripper bar
- a magnetic cylinder 26 designed in this way also serves to transport the substrate 02.
- the ring elements 31 are interrupted in the circumferential direction, for example as can be seen in Fig. 3, 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.
- suction openings 28 are provided in the area of the envelope, through which substrate sheets 02 transported on the cylinder 26 can be sucked onto the peripheral surface. These can basically be provided in suction channels running between the groups of magnetic elements 24, or as shown in suction elements 29 assigned to the magnetic elements 24.
- the suction openings 28 can be connected to a suction air source or air pressure sink via a rotary feedthrough 34 provided on the front side of the shaft 32 - preferably on both sides - for applying negative pressure.
- a support element 36 is provided which has a support surface at the level of the cylinder envelope for supporting the substrate 02 conveyed via the cylinder 26.
- the latter can be formed by the peripheral surface of a support element 36 designed as a support ring or by a support plate provided on such a support ring.
- the magnetic elements 24 are arranged on magnetic element carriers 38, which in turn are arranged in groups on the above-mentioned ring elements 31, which can preferably be positioned axially on the shaft 32, preferably in the circumferential direction.
- the magnetic elements 24 can be provided together with one or more associated suction elements 29 on such a magnetic element carrier 38 and form a structural unit, which can be positioned on the ring element 31, for example in the circumferential direction.
- particles P applied to the substrate 02 - e.g. at least in a surface area relevant to the image or motif to be displayed - can be aligned by an alignment device 26 mentioned above, in particular an above-mentioned magnetic cylinder 26, provided for image-forming alignment.
- At least one further alignment device 41; 42 is provided, which comprises one or more magnetic elements 43; 44 which are fixed to the frame, i.e. stationary, on the transport path during operation, and which enter or can enter into magnetic interaction with magnetic or magnetizable particles P on the substrate 02 which is guided along the transport path.
- the further alignment device 41; 42 is arranged in operation at a point on the transport path which is opposite a cylinder circumferential section of a cylinder 12; 26 transporting the substrate 02, i.e.
- a gap between the magnetic element(s) 43; 44 and the jacket surface for example a gap with a width d of between 3 and 10 mm, in particular between 4 and 7 mm, for the passage of the substrate 02.
- the further, operationally stationary alignment device 41; 42 comprises a one- or multi-part carrier 46 carrying the magnetic element or elements 43; 44, which is mounted on both sides in a positionally variable manner in frame walls 38; 39 of a frame, e.g. a frame part receiving the alignment device 41; 42, so that the magnetic elements 43; 44 carried by it can be moved between a position A, for example working position A, in which the magnetic elements 43; 44 are in an operating position, and a setup or inactive position R, in which the magnetic elements 43; 44 are at a greater distance from the transport path than the working position A and/or in which the magnetic elements 43; 44 and/or a transport path section that is obstructed in working position A by the magnetic elements 43; 44 is more easily accessible.
- a position A for example working position A, in which the magnetic elements 43; 44 are in an operating position
- a setup or inactive position R in which the magnetic elements 43; 44 are at a greater distance from the transport path than the working position A and/or in which the magnetic elements 43
- the carrier 46 carrying the magnetic elements 43; 44 of this further alignment device 41; 42 is mounted on both sides in or on at least one guide 47; 48, in or on which the carrier 46 together with the magnetic elements 43; 44 can be moved along a movement path from the working position A to the setup position R and vice versa.
- the movement or mobility along the movement path is - in contrast to, for example, pivoting on levers about a fixed pivot axis - e.g. a translational Movement, in particular a translational movement as a whole, ie of all components of the movable carrier 46 between a respective working position A and setup position.
- the movement path for the movement of the carrier 46 predetermined by the guides 47; 48 preferably runs in a plane perpendicular to the axis of rotation of the cylinder 12; 26 and/or can comprise one or more linear and/or curved guide sections 47.1; 47.2; 48.1; 48.2.
- the guides 47; 48 in which the carrier 46 is to be guided past another machine component arranged on the same cylinder 12; 26, e.g. a drying and/or curing device 19, they are designed with guide sections 47.1; 47.2; 48.1; 48.2 such that they initially lead away from the cylinder 12; 26 with a radial directional component, e.g. a larger directional component than the tangential component, from the working position A, and are then moved away from the cylinder 12; 26 with a smaller radial directional component and/or a larger tangential directional component than the radial component to improve accessibility.
- a radial directional component e.g. a larger directional component than the tangential component
- the respective guide 47; 48 can, in the simplest case, be formed by a one-sided contact surface on which a carrier-side support element 49; 51, e.g. in the form of a bolt 49; 51 or a roller 49; 51, is supported and on which this can be displaced along the path of movement.
- a carrier-side support element 49; 51 e.g. in the form of a bolt 49; 51 or a roller 49; 51
- it is designed in the manner of a guide groove 47; 48 in which the carrier-side support element 49; 51, e.g. in the form of a bolt 49; 51 or a roller 49; 51, is supported on one side by a contact surface and on the other side - at least on the section between the position it is in in working position A and a position possibly intended for complete removal - is secured against tipping or unintentional jumping out by a further surface.
- the position of the respective guide 47; 48 in a section defined by the support element 49; 51 in working position A, the position of the respective guide 47; 48, particularly in the area of its other end, can be An opening 52; 53, e.g. in the form of an exit 52; 53 from the guide groove 47; 48, can be provided in the guide 47; 48 designed as a guide groove 47; 48, through which the respective support element 49; 51 can exit or be guided through the respective guide groove 47; 48 in the removal position.
- the carrier 46 can be removed through such openings 52; 53.
- two such guides 47; 48 are provided on each end face of the carrier 46 to be guided, each of which interacts, for example, with a carrier-side support element 49; 51.
- the carrier-side support elements 49; 51 are provided at a distance from one another on the carrier 46, so that, in particular in the case of guide grooves 47; 48, tilting of the carrier 46 about an axis parallel to the axis of rotation of the cylinder 12; 26 is prevented.
- the guides 47; 48 can be provided directly in the frame walls 38; 39 of the frame supporting the alignment device 41; 42, e.g. on the inward-facing side thereof. In an advantageous embodiment, however, these are provided in or on side parts 54; 56, in particular side plates 54; 56, which in turn are arranged - e.g. detachably - on the frame walls 38; 39.
- Such side plates 54; 56 can be individually designed with guides 47; 48 depending on the arrangement of the alignment device 41; 42 and the space available, without having to specifically intervene in any existing standard frame designs.
- a fixing device or locking device 57 e.g. a spring-loaded bolt 57, can be provided on the carrier 46, which engages in an opening on the frame or a side plate 54; 56 when the carrier 46 is correctly in the working position A.
- the movement of the carrier 46 in or on the guides 47; 48 between the different positions A; R can basically be carried out in any suitable manner, but is advantageously implemented here by a gear-based linear drive 58, 59.
- a gear 58 engages in a corresponding tooth pattern 59 extending along the distance to be covered.
- This tooth pattern 59 can be formed by a rack 59 - possibly adapted in its shape to the guide path - or, as shown here, by a row of teeth 59 provided in the side plate 56 on at least one side in the form of bolts 61 arranged individually in the side plate 56 along the guide path.
- the gear 58 can preferably be driven via a - preferably self-locking - gear 62, e.g. a worm gear 62.
- the latter can be operated on the drive side, for example manually, e.g. via a handwheel 63, or in a more convenient version via a drive motor.
- the magnetic elements 43; 44 of the further alignment device 41; 42 can be formed by individual magnets or by a group of several individual magnets and can be accommodated individually or as a group on a magnetic carrier 66; 67.
- the individual magnets can be formed by permanent magnets or electromagnets.
- these are arranged next to one another at a distance from one another transversely to the transport direction T, in particular in a distribution that corresponds in pattern to the arrangement of the columns of blanks 09 arranged on the substrate 02.
- the operationally stationary alignment device 41; 42 preferably has a plurality of magnetic elements 43; 44 spaced apart from one another transversely to the transport direction T, e.g. between four and eight, in particular between five and seven, e.g. six.
- the magnetic elements 43; 44 of the further alignment device 41; 42 or the magnet carriers 66; 67 receiving the magnets are mounted so as to be transversely movable, for example on one or more cross members 64 encompassed by the carrier 46. They can be fixed in a desired position, e.g. via a hand knob 69, by means of a holding device 68 designed, for example, as a clamping mechanism 68.
- the magnetic elements 43; 44 of the alignment device 41; 42 are arranged detachably on the carrier 46 or on the relevant magnetic carrier 66; 67 and/or the magnetic carriers 66; 67 are arranged detachably on the carrier 46.
- the carrier 46 together with the magnetic elements 43; 44 can be arranged so that they can be removed from the frame.
- the magnetic elements 43; 44 of the further alignment device 41; 42 could in principle also be arranged on a linear transport path section and at least on the side facing the transport path could have an elongated and flat shape in the transport direction T
- the magnetic elements 43; 44 which can be moved in guides 47; 48 in this way are preferably arranged on a curved transport path section, e.g. an above-mentioned cylinder 12; 26 and at least on the side facing the transport path have an elongated curved shape along the transport path, in particular curved in the manner of a segment of a circle.
- such a further alignment device 41 is designed in the transport path of the substrate 02 to be conveyed as a further alignment device 41 serving for pre-orientation, in short pre-alignment device 41, and e.g. a the imaging alignment device 26, in particular the magnetic cylinder 26, is arranged upstream of the magnetic cylinder 26 in the transport path.
- a further alignment device 41 is arranged upstream of the magnetic cylinder 26 in such a way that the particles P can be pre-oriented by its magnetic elements 43 in surface areas adjacent to at least the imaging sub-areas.
- the magnetic elements 43 of this second alignment device 41 are designed and oriented in such a way that the particles P of the surface area passing through their effective area are biaxially aligned parallel to one another, so that a homogeneous optical impression is created over this surface area.
- the magnetic elements 43 are designed and aligned in such a way that the resulting magnetic fields align the particles P - e.g. flat and with a length greater than the width - in the relevant surface area of the image element 03 with their flat side parallel to the substrate surface and with their longitudinal extension all pointing in the same direction.
- the pre-alignment device 41 preferably comprises one or preferably several magnetic elements 43 transversely to the transport direction T in the above manner and is arranged on the transport path in such a way that in the working position A, with the one or more magnetic elements 43 it comprises, it enters or can enter into magnetic interaction with particles P provided on a substrate 02 to be guided past on the transport path.
- the magnetic elements 43 of the pre-alignment device 41 are provided on the side of the transport path that is opposite the side on which the last printing was done in the upstream transport path or on which the coating agent 06 was applied.
- the magnetic elements 43 are preferably provided on the side of the substrate 02 that was not last printed or that was freshly printed.
- Fig. 2 b the effect of such a pre-orientation is shown schematically on the right-hand side (Fig. 2 b)), where the Roman numeral II represents a state II in which the particles P in the coating agent have already been pre-oriented, for example by the pre-alignment device 41, but an image-forming alignment has not yet taken place or has been ignored in the representation.
- the previously randomly oriented particles P are aligned in an orderly manner, e.g. parallel or otherwise homogeneous, and thus form a background that provides an improved contrast to a pattern or image motif with differently oriented particles P.
- particles P - e.g. the same and/or neighboring particles P, in particular those located in the surface area relevant for the image or motif to be displayed - can be oriented or subjected to an additional magnetic force before interacting with the imaging magnetic cylinder 26 or upstream thereof and/or at least at one point in time or in a period of time during the interaction with the imaging magnetic cylinder 26 with the aid of at least one further alignment device 41 serving for pre-orientation.
- such a further alignment device 42 is provided as an alignment device 42 serving a simultaneous orientation, in short simultaneous alignment device 42, with one or more magnetic elements 44, which is arranged on the side of the transport path opposite to the first alignment device 26 on the transport path in such a way that the same and/or mutually adjacent surface areas of a same image element 03 to be produced by applying the coating agent 06 to the substrate 02 are aligned at at least one point in the transport path simultaneously with the imaging alignment device 26, in particular the magnetic cylinder 26, which moves simultaneously with the substrate 02, and with the further, simultaneous orientation of particles P serving alignment device 42.
- particles P of an image element 03 in this embodiment are or are subjected to an aligning force at at least one point on the transport path by the magnetic field of a magnet 27 of the imaging alignment device 26, in particular a magnetic element 24 of the magnetic cylinder 26, and at the same time the same and/or other particles P of the same image element 03 are also subjected to an aligning magnetic force by the magnetic field of a magnetic element 44 of the further alignment device 42 serving the simultaneous orientation.
- the simultaneous alignment device 42 is arranged with its magnetic elements 44 on the transport path on the side of the transport path opposite the imaging alignment device 26.
- the simultaneous alignment device 42 can therefore orientate or apply an additional magnetic force to particles P, for example the same and/or neighboring particles P, particularly those located in the surface area relevant for the image or motif to be displayed, at least at one point in time or in a period of time during the interaction with the imaging magnetic cylinder 26 with the aid of at least the simultaneous alignment device 42.
- An above-mentioned machine 01 with at least one application device 04 and at least one imaging alignment device 07, in particular a magnetic cylinder 07 can, for example, only have a pre-alignment device 41 arranged upstream of the imaging alignment device 07, in particular on the circumference of an upstream transport cylinder 12, or a simultaneous alignment device 42 located opposite the imaging alignment device 07, in particular the magnetic cylinder 26, in the transport path.
- a pre-alignment device 41 and a simultaneous alignment device 42 are assigned to the magnetic cylinder 26.
- several, e.g. two, application devices 04 can be provided in the transport path for applying coating agent 06 to the same side of the substrate 02, between which the substrate 02 is or can be transported via a series of cylinders 12; 26, e.g. simply by transferring from cylinder 12; 26 to cylinder 12; 26, wherein at least one of the cylinders 26 provided in between is formed by a magnetic cylinder 26.
- a pre-alignment device 41 and/or a simultaneous alignment device 42 can be assigned to the magnetic cylinder 26 in the above manner.
- two application devices 04 can be provided in the transport path for applying coating agent 06 to the different sides of the substrate 02, between which the substrate 02 is or can be transported via a series of cylinders 12; 26, e.g. simply by transferring from cylinder 12; 26 to cylinder 12; 26, wherein at least one of the cylinders 26 provided between them is formed by a magnetic cylinder 26.
- a pre-alignment device 41 and/or a simultaneous alignment device 42 can be assigned to the magnetic cylinder 26 in the above manner.
- a first application device 04 applying coating agent 06 to a first substrate side and a second application device 04 also directed to the first substrate side are provided.
- a transport cylinder 12 with a pre-alignment device 41 - e.g. directed to the second substrate side - and further downstream a magnetic cylinder 26 with a simultaneous alignment device 42 - e.g. directed to the first substrate side - are provided.
- further transport cylinders 12 can be provided between the cylinders 12; 26 mentioned.
- Downstream of the second application device 04, which is also directed at the first substrate side there is provided a third application device 04 directed at the second substrate side.
- a transport cylinder 12 with a second pre-alignment device 41, e.g. directed at the second substrate side, and further downstream a second magnetic cylinder 26 with a second simultaneous alignment device 42, e.g. directed at the first substrate side.
- a further transport cylinder 12 with a further, e.g. third pre-alignment device 41, e.g. directed at the first substrate side, and further downstream a third magnetic cylinder 26 with a further, e.g. B. third simultaneous alignment device 42 is provided.
- further transport cylinders 12 can also be provided between the cylinders 12; 26 mentioned.
- a drying and/or curing device 19 directed at the substrate 02, which only partially dries or cures the previously applied coating agent 06 containing particles P, i.e. not over the entire surface.
- the part comprising the third application device 04 and the subsequent fourth pre-alignment and fourth simultaneous alignment device 41, 42 together with the associated cylinders 12; 26 can be omitted.
- the part comprising the third pre-alignment device 41 and the third simultaneous alignment device 42 together with the associated cylinders 12; 26 can be omitted.
- Drying and/or curing device radiation dryer, UV radiation dryer, UV dryer, UV-LED dryer 0 1 Conveyor device, gripper conveyor, chain gripper system 2 Product pick-up, stack delivery 3 Dryer, radiation dryer 4 Active element, element, magnetic element
- Alignment device pre-alignment device
- Support element bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element, bolt, roller 51 Support element,
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Printing Methods (AREA)
- Registering Or Overturning Sheets (AREA)
- Rotary Presses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022128121.3A DE102022128121A1 (de) | 2022-10-25 | 2022-10-25 | Vorrichtung zum Ausrichten von magnetischen oder magnetisierbaren Partikeln sowie Maschine zur Erzeugung optisch variabler Bildelemente |
| PCT/EP2023/071454 WO2024088611A1 (de) | 2022-10-25 | 2023-08-02 | Vorrichtung zum ausrichten von magnetischen oder magnetisierbaren partikeln sowie maschine zur erzeugung optisch variabler bildelemente |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4496709A1 true EP4496709A1 (de) | 2025-01-29 |
| EP4496709B1 EP4496709B1 (de) | 2026-01-21 |
Family
ID=87571849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23754711.2A Active EP4496709B1 (de) | 2022-10-25 | 2023-08-02 | Vorrichtung zum ausrichten von magnetischen oder magnetisierbaren partikeln sowie maschine zur erzeugung optisch variabler bildelemente |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12420545B2 (de) |
| EP (1) | EP4496709B1 (de) |
| JP (1) | JP7757550B2 (de) |
| CN (1) | CN119136986B (de) |
| DE (1) | DE102022128121A1 (de) |
| WO (1) | WO2024088611A1 (de) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2007200128B8 (en) * | 2006-01-17 | 2013-02-07 | Viavi Solutions Inc. | Apparatus for orienting magnetic flakes |
| JP4950538B2 (ja) * | 2006-04-03 | 2012-06-13 | 株式会社小森コーポレーション | マグネットシリンダに装着されるプレート |
| JP4920287B2 (ja) * | 2006-04-03 | 2012-04-18 | 株式会社小森コーポレーション | プレート案内装置 |
| CN103192591B (zh) * | 2013-04-10 | 2015-10-21 | 中国人民银行印制科学技术研究所 | 磁定向滚筒及印刷机 |
| TWI772576B (zh) * | 2018-01-17 | 2022-08-01 | 瑞士商西克帕控股有限公司 | 用於生產光學效應層之製程 |
| EA038007B1 (ru) * | 2018-01-17 | 2021-06-22 | Сикпа Холдинг Са | Способы получения слоев с оптическими эффектами |
| ES2929050T3 (es) * | 2018-07-25 | 2022-11-24 | Koenig & Bauer Ag | Dispositivos para alinear partículas magnéticas o magnetizables, así como máquina para generar elementos de imagen ópticamente variables |
| DE102018127936A1 (de) * | 2018-11-08 | 2020-05-14 | Koenig & Bauer Ag | Vorrichtung, Druckmaschine und Verfahren zur Herstellung eines Sicherheitselementes auf einem Substrat |
| JP7713474B2 (ja) * | 2020-05-26 | 2025-07-25 | シクパ ホルディング ソシエテ アノニム | 配向された小板状の磁性又は磁化可能顔料粒子を含む光学効果層を作製するための磁気アセンブリ及び方法 |
| CN116075432B (zh) * | 2020-10-01 | 2025-07-04 | 柯尼格及包尔公开股份有限公司 | 用于生成光学可变图元的机器 |
| DE102021105635A1 (de) * | 2021-03-09 | 2022-09-15 | Koenig & Bauer Ag | Siebdruckeinheit mit Ausrichtzylinder |
| DE102021105634A1 (de) | 2021-03-09 | 2022-09-15 | Koenig & Bauer Ag | Siebdruckeinheit und ein Verfahren zum Betreiben einer als Siebdruckeinheit ausgebildeten Bogendruckeinheit |
-
2022
- 2022-10-25 DE DE102022128121.3A patent/DE102022128121A1/de not_active Withdrawn
-
2023
- 2023-08-02 CN CN202380040564.5A patent/CN119136986B/zh active Active
- 2023-08-02 EP EP23754711.2A patent/EP4496709B1/de active Active
- 2023-08-02 WO PCT/EP2023/071454 patent/WO2024088611A1/de not_active Ceased
- 2023-08-02 US US18/867,822 patent/US12420545B2/en active Active
- 2023-08-02 JP JP2024568351A patent/JP7757550B2/ja active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024088611A1 (de) | 2024-05-02 |
| JP2025515931A (ja) | 2025-05-20 |
| CN119136986B (zh) | 2025-09-16 |
| EP4496709B1 (de) | 2026-01-21 |
| DE102022128121A1 (de) | 2024-04-25 |
| JP7757550B2 (ja) | 2025-10-21 |
| US20250170818A1 (en) | 2025-05-29 |
| US12420545B2 (en) | 2025-09-23 |
| CN119136986A (zh) | 2024-12-13 |
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