EP1894721A2 - Method for mounting a flexible printing plate onto the form cylinder of a rotary printing press - Google Patents

Abstract

The device has a retaining unit (11) arranged outside of a mold cylinder (6) and separated from the mold cylinder. The retaining unit holds a flexible printing plate (1) to be mounted in an application point by a non-positive connection. A sensor or an electromechanical switch is provided, where a touch contact of the sensor or the switch produced between the retaining unit and a rear side of the printing plate is operated, when a control device engages the non-positive connection.

Description

The invention relates to devices for mounting a flexible printing plate on a forme cylinder of a rotary printing press according to the preamble of claim 1 or 3.

The z. B. used in newspaper printing rotary printing machine operates z. B. in an offset printing process, be it in a conventional, a fountain solution using or in a waterless, d. H. without a fountain solution printing offset printing process. The rotary printing press preferably has a plurality of printing units each having at least one forme cylinder. The forme cylinder has on its lateral surface both in its axial direction and preferably in its circumferential direction a plurality of mounting positions, on each of which a printing plate can be mounted. The form cylinder is z. B. as a 4/2 or 6/2 forme cylinder formed in its axial direction either four or six juxtaposed printing forms and z. B. two each in the circumferential direction successively arranged printing forms. The circumference of the forme cylinder is z. In the range between 280 mm and 410 mm; its axial length can be up to 2,600 mm. The form cylinder can, for. B. be used in a 9-satellite printing unit or in a H-pressure unit. The form cylinder and a cooperating with him transfer cylinder are z. B. each formed as a double circumferential cylinder. As the substrate is preferably a respective printing unit continuous material web, for. As a paper web used.

Especially in multi-color printing, it is necessary to register the printing forms involved in the printing process in register on the respective forme cylinder in order to ensure correct overprinting of the creation of a page of a printed product to ensure the printing inks involved. It is known to provide at least one register element on or in the forme cylinder in order to align the respective printing forme in its respective mounting on the forme cylinder accordingly. Especially with regard to an automated feeding of the respective printing forme to the forme cylinder, it is advantageous to produce the registration of the respective printing form already in its supply to the forme cylinder. Moreover, there is the danger in practice that a printing forme to be mounted with its leading edge obliquely, that is not hung parallel to the course of the channel edge in the channel opening. In such a case, the printing form to be mounted can also be drawn obliquely on the lateral surface of the forme cylinder.

By the WO 2004/020202 A2 Devices are known for mounting a printing plate on a forme cylinder of a printing machine, wherein at least one activatable friction body presses a printing forme during its mounting on a forme cylinder against a corresponding abutment as soon as a beveled at the leading end of the printing form hanger hooks at one edge of a channel opening of the forme cylinder , The friction body and its abutment are preferably arranged perpendicular to the conveying direction of the printing plate and act like a brake or jaws, which hold the printing plate in its sliding between the friction bodies and their abutments in a defined manner, while the printing plate is mounted on the same from the rotating form cylinder. The activated friction bodies cause the printing forme to be drawn tightly onto the forme cylinder and for the printing forme to bear against the edge of the channel opening of the forme cylinder without play.

Furthermore, by the DE 44 24 931 C2 a method for mounting a flexible printing forme on a forme cylinder of a rotary printing machine, wherein the printing form is mounted with its leading edge on an edge of an axially parallel in the form cylinder channel opening, wherein the printing forme to be mounted from at least one outside of the forme cylinder and separated from the latter arranged holding means is held by a frictional connection to at least one positionally fixed point of attack, wherein the printing form is brought from the holding means to an axial position of the forme cylinder, wherein used for registered registration of the printing plate arranged in the form cylinder side register stop and the forme cylinder supplied printing form only then to this Seitenregisteranschlag is applied after the printing plate has been hung with its leading edge on the edge of the cylinder in the form parallel to the axis arranged channel opening and biased there.

By the DE 44 12 895 A1 a method and an apparatus for mounting a flexible printing forme on a forme cylinder of a rotary printing machine is known, wherein the printing forme is held at its rear end by a form outside of the forme cylinder and separated therefrom holding means by a positive connection, the printing forme with its leading edge on a Edge of a cylinder in the form parallel to the axis arranged channel opening is hung, wherein the forme cylinder aufges the printing form on its lateral surface by a rotational movement, wherein the printing plate is held during its Aufziehvorgangs of the holding means.

By the EP 1 101 612 A2 a method for automatically applying a printing plate on a plate cylinder in a rotary printing machine is known in which a first edge of the printing plate is hired against the peripheral surface of a plate cylinder adjacent to the cylinder and thereby aligned, wherein the pressure plate to be mounted on the plate cylinder on its printed image side of a torsionally elastic holding means is held.

From the EP 0 678 382 B1 It is known that a front edge of a printing form, which is mounted on an edge of a parallel in a form cylinder arranged channel opening, applies to the channel boundary when the printing plate is raised against a restraining force by rotation of the forme cylinder on the forme cylinder. In addition, in this document, a device is described which a the Form cylinder to be supplied to the printing forme holds on its rear side with a plurality outside the forme cylinder and separated from this arranged suction pads.

In an advantageous method for mounting a flexible printing plate on one of preferably a plurality of forme cylinders of the rotary printing press, the printing plate is mounted with its leading edge on an edge of a parallel in the form cylinder channel opening arranged, even without a register-based registration there on a provided on the channel opening register element , Wherein the form cylinder is already hinged, but otherwise not on the lateral surface of the forme cylinder aufgezogene printing form is held by at least one outside of the forme cylinder and separated from this holding means, said at least one holding means the printing plate by a frictional connection to at least one positionally fixed point holds and aligns the printing plate before mounting in position to the forme cylinder in register, wherein the holding means the register-oriented printing form during its assembly on the forme cylinder d by the adhesion in their register-holding position. The assembly of the printing forme includes, in particular, the mounting of this printing forme on the forme cylinder and the mounting of this printing forme on the forme cylinder, whereas the feeding of this printing forme to the forme cylinder and the alignment of this printing forme to the forme cylinder are steps that prepare this assembly and thus precede the actual mounting.

Moreover, it is advantageous not only to produce the registration of the respective printing form already in connection with its feeding to the forme cylinder, but also to reliably maintain the registration of this printing form produced at the beginning of the assembly process during its entire assembly process. Characterized in that the required for performing a high-quality printing parallelism between the leading edge of the printing plate and the profile of the edge of the channel opening is made, as long as the leading edge of the printing form is not fixed and tight at the edge of Channel opening is applied, the force required to align the printing plate is low and there is also no risk that the printing form during their alignment by the spaced from the forme cylinder arranged holding means twisted. The required parallelism between the leading edge of the printing form and the course of the edge of the channel opening exists when the length of the printing form is aligned perpendicular to the course of the channel edge. The proposed method is also well suited for use in an automated feeding of the respective printing forme to the forme cylinder.

The printing form has at least at its leading edge, d. H. at its during its assembly the forme cylinder facing edge z. B. a suspension leg, said suspension leg is preferably bent at an acute angle or at right angles relative to the extended length of the printing plate and is preferably mounted positively on the edge of the channel opening. Also at its rear edge, d. H. At its edge facing away from the forme cylinder in their assembly, the printing forme can have a suspension leg, wherein this formed on the rear edge suspension leg relative to the extended length of the printing form z. B. is bent at an obtuse angle or preferably approximately at right angles. Both the suspension leg at the front edge of the printing form and the suspension leg at the rear edge of the printing form are each bent in the direction of the back of the printing plate. The back of the printing forme is the unimaged surface extending between its front edge and its rear edge, with which the printing form rests on the lateral surface of the forme cylinder after its mounting. The existing of a flexible, preferably metallic material printing plate is flexible at least in length to z. B. adapted to the curved circumference of the forme cylinder.

Before being mounted, the at least one holding means preferably holds the printing forme at its non-imprinted rear side due to the frictional connection. It can be provided that the pressure cylinder mounted on the forme cylinder with a force acting on it in such a way is bent along its length, that the back of the printing forme is brought by this bend to the at least one separately arranged from the forme holding means, until between the pressure plate to be mounted and the holding means preferably a touch contact is made. The frictional connection between the at least one separately arranged from the forme cylinder holding means and the printing form can, for. B. be induced pneumatically by a suction force or by a magnetic force.

The at least one holding means preferably aligns the printing forme in its position relative to the forme cylinder at a point in time at which the forme cylinder is in its idle state and thus does not rotate. After the register-containing alignment of the printing forme is completed with respect to their position to the forme cylinder, the forme cylinder pulls on its lateral surface by a rotational movement of the attached to him printing plate.

Preferably, the at least one holding means exerts by a moving away from the forme cylinder movement away from the forme cylinder pulling force on the hinged with its front edge printing form. When the forme cylinder rests on the pressure plate mounted on it on its lateral surface, this is done z. B. against the force exerted on this printing form traction. In this case, the at least one holding the printing forme holding means can be pulled against the force of a spring element in the direction of the forme cylinder.

To ensure that the printing forme does not slip during its mounting on the lateral surface of the forme cylinder, thereby losing its registration, it can be provided that the printing forme is pressed against the lateral surface of the forme cylinder by a pressing element positioned in a fixed position relative to the forme cylinder and attached to the forme cylinder becomes. Furthermore, it can be provided that the at least one holding means arranged separately from the forme cylinder is released from the printing form as soon as possible the printing forme is pressed by the pressing element against the lateral surface of the forme cylinder. It can also be provided that the tensile force exerted by the at least one holding means arranged separately from the forme cylinder on the printing forme is terminated as soon as the printing forme is pressed by the pressing element against the jacket surface of the forme cylinder. The separate from the forme cylinder arranged, the adhesion to the printing form exercising holding means and the pressure mold to the outer surface of the forme-pressing pressure element are for. B. arranged about half the length of the printing form spaced from each other.

Especially in the case of a rotary printing machine used in newspaper printing, it is usually provided that a plurality of printing plates are suspended side by side in the axial direction of the respective forme cylinder in accordance with the method described above and then mounted on the lateral surface of the forme cylinder. This z. B. all in the axial direction of the forme cylinder juxtaposed printing forms each of a relative to the respective form cylinder stationarily positioned pressed against this form cylinder pressure element pressed against the lateral surface of this forme cylinder. The assembly of the plurality in the axial direction of the forme cylinder suspended side by side printing forms can, for. B. also take place at substantially the same time.

The operations of assembly and disassembly of at least one printing plate on the lateral surface of a forme cylinder will be explained again below with reference to corresponding figures. Each printing form to be mounted is automatically aligned in register. In the case of a plurality of printing plates arranged side by side in the axial direction of the forme cylinder, holding means associated with the individual printing forms and provided in the respective channel of the relevant forme cylinder can be selected and activated separately.

Show it

Fig. 1 to 6

Operations when mounting a printing form;

Fig. 7 to 10

Processes when dismantling a printing plate;

Fig. 11

various arrangements of the holding device in a 9-satellite printing unit with Doppelumfangsformzylindern;

Fig. 12

various arrangements of the holding device in a H-pressure unit;

Fig. 13 to 15

Details of the holding device;

Fig. 16

an in-order receiving and / or donating device;

Fig. 17

a section of a printing unit with the forme cylinder rectilinear tangential employment of the respective holding device;

Fig. 18

various arrangements of the holding device in a 9er satellite printing unit with single-circumferential cylinders.

Assembly of at least one printing form

According to FIG. 1, the respective printing forme 01 to be mounted by hand preferably with its at its leading edge 02 z. B. at an acute angle or at right angles bevelled suspension leg 03 at an edge 04 of a leading axis in a forme 06 arranged channel 07 opening 08, ie the channel opening 08 mounted. In an arrangement of a plurality of mounting positions for each one printing forme 01 along the circumference of the forme cylinder 06, the forme cylinder 06 according to several on the circumference of this forme cylinder 06 mutually offset channels 07 on, z. B. are two channels 07 offset by 180 ° to each other. After hanging their front edge 02 at the respective channel opening 08, the respective printing forme 01 is preferably by hand z. B. on a trained in the form of a shelf protection 09, z. As a shaped sheet metal part, pressed - indicated in Fig. 1 by a directional arrow for the effective force -, wherein the respective printing forme 01 their length under the pressure exerted on their printed page by hand pressure at least corresponding to the length of their preferably approximately at right angles be folded Einhänlegeels 13 at its rear edge 12 bends, provided that this suspension leg 13 at its rear edge 12 before the pressure exerted by hand on the printed image side of the respective printing forme 01 on the z. B. protested as a flat surface protection 09, wherein the flat surface may be aligned tangentially or radially to the forme cylinder 06 (Fig. 11 and 12).

Preferably integrated in the protector 09, e.g. B. in a breakthrough of the flat surface, there is at least one separate from the forme cylinder 06 arranged holding means 11, said holding means 11 z. B. as a suction pad z. B. is formed with an angular, round or oval cross-sectional area, said holding means 11, the printing plate 01 preferably using a sensor 19 or switch 19 detects (Fig. 13) and z. B. sucks by a negative pressure. By z. B. the suction creates a frictional connection between the respective printing forme 01 and the holding means each holding them 11. The suction gripper is z. B. dish-shaped, wherein a formed on the suction pad suction chamber is sealed by an applied to the suction pad or there applied printing plate 01.

The holding means 11 is at least in the flat surface of the protection 09 z. B. movably arranged by means of corresponding joints to allow alignment of the held by him printing plate 01 in this flat surface of the protection 09. The at least one point of the at least one holding means 11 is z. In the rear, that is from the forme cylinder 06 further half or in the back third of the aligned printing plate 01, and preferably approximately halfway to be aligned printing plate 01. At the respective point of attack, the holding means 11 is a non-positive and thus fixed for the duration of the adhesion, slippage and play-free connection to the aligned printing plate 01 ago. The frictional connection is preferably switched on or off by a control device.

By the movement of the in the flat surface of the guard 09 movably arranged holding means 11 after the production of this non-positive connection, the printing plate 01 is also moved in the flat surface of the protection 09, ie it is displaced in this plane and can thereby relative to the edge 04 the aligned to the arranged in the forme 06 channel 07 channel opening 08 are aligned. After registering aligning the respective printing forme 01 on the protection 09, the printing forme 01 is withdrawn from the holding means 11 in a manner remotely from the forme cylinder 06, ie the printing forme 01 is pulled or tightened tightly along its length between its leading edge 02 and the point of application of the holding means 11 , whereby the leading edge 02 of this printing plate 01 is firmly and straight to the edge 04 of the opening 07 leading to the channel 07 is pulled. The leading edge 02 of this printing plate 01 is then in register, ie aligned parallel to the course of this edge 04 of the opening 08. Holding the printing forme 01 holding means 11 leaves when tightening the printing forme 01 its basic position A and moves in a more distant from the forme cylinder 06 position B, which is indicated in Fig. 1 by tick marks. The movement of the holding means 11 from its basic position A in its from the forme cylinder 06 more distant position B is driven by a drive 16, for. B. by a linear drive 16, the force effect is indicated by a facing away from the forme cylinder 06, parallel to the surface of the protection 09 extending direction arrow. The process of register-oriented alignment of the respective printing plate 01 is preferably carried out at a standstill of the relevant forme cylinder 06, that is, during this no rotational movement is performed.

The forme cylinder 06 starts to rotate driven by a drive, not shown in its production direction - indicated in Fig. 2 by a direction of rotation arrow - and begins with its rotational movement at the edge 04 leading to the channel 07 opening 08 hinged printing plate 01 on its lateral surface raise, wherein the forme cylinder 06, the leading edge 02 of this printing forme 01 first once under a relative to the forme 06 fixedly positioned, on the outer surface of the forme cylinder 06 employed pressing member 14 pulls. This provided as an assembly aid, arranged near the lateral surface of the forme cylinder 06 pressure element 14 may, for. B. be formed as a pressure roller 14. In the case of several in the axial direction of the forme cylinder 06 juxtaposed printing plates 01 the individual printing plates 01 associated pressing elements 14 may be combined to form a pressure strip, wherein the individual pressure elements 14 of this Andrückleiste together or preferably individually and independently of the other pressing elements 14 to the outer surface of the forme 06 can be adjusted or turned off from this. The individual pressure elements 14 can be oscillating in the axial direction of the forme cylinder 06 around a tangential axis to the peripheral line of the forme cylinder 06, ie in the form of a rocker. The respective printing forme 01, while pressed against the lateral surface of the forme cylinder 06 by the at least one associated pressing element 14, continues to be held by the holding means 11 holding it while exerting a traction force away from the forme cylinder 06 for a certain period of time and / or along a certain length retained by the printing forme 01 distance. Holding the printing forme 01 holding means 11 is moved by the rotational movement of the forme cylinder 06 from its remote from the forme cylinder 06 position B on its basic position A addition to a forme cylinder 06 closer position C. The holding the printing plate 01 holding means 11 thus has at least three positions, except its basic position A nor the respective one stroke of the holding means 11 delimiting, diametrical positions B and C. To maintain the printing form 01 firming tensile force, the movement of the printing forme 01 holding holding means 11 against the force of a z. B. connected to the linear actuator 16 spring element 17.

Preferably, the pressing elements associated with the individual printing plates 01 14 take over at the latest after the expiry of the time for the maintenance of the printing form 01 firming traction time and / or after passing through the particular distance to be traveled by the printing plate 01 the register-fixing of the respective printing plates 01, so that the respective printing forme 01 holding holding means 11 can be released from the respective printing forme 01, d. H. the adhesion between the aligned printing plate 01 and the respective holding means 11 is terminated by the force is given up, for. B. by switching off the suction. Thereafter, the holding means 11 holding the respective printing forme 11 moves back into its respective basic position A. Here, the previously compressed by the assembly of the printing plate 01 spring element 17 can relax again. As long as the holding means 11 holding the respective printing forme 01 holds the respective printing forme 01, the position of the respective point of application of the at least one holding means 11 on the printing forme 01 remains unchanged (FIG. 3).

The forme cylinder 06 now rotates up to the position at which at least one command for a separate selection of the individual printing plates 01 associated, arranged in the channel 07 of the respective forme 06 holding means are passed to a non-contact accepting and / or donating device 18 this command can. This position is z. B. given by the fact that the channel 07 leading to the opening 08 is radially below this device 18. The device 18 is preferably arranged in the immediate spatial vicinity of the lateral surface of the forme cylinder 06. With the appropriate command transfer opens the respective printing forme 01 associated, arranged in the channel 07 holding means, ie it changes from a holding position to a release position, so that the bent at the rear edge 12 of each printing plate 01 suspension leg 13 in the channel 07 leading Opening 08 unimpeded introduced and then in the channel 07 by the holding means arranged there z. B. can be fixed by a clamp. Other already arranged on the lateral surface of the forme cylinder 06 printing plates 01 remain fixed on the lateral surface of the forme cylinder 06, since each of their arranged in the channel 07 holding means does not change from a holding position to a release position. By the commands non-contact and / or donating device 18, the respective holding means arranged in the channel 07 are each individually selectable and operable accordingly (FIG. 4).

After the beveled leg 13 at the rear edge 12 of the respective printing forme 13 has reached the channel 07 leading to the opening 08 by the continued rotational movement of the forme cylinder 06, this suspension leg 13 by the employee on the outer surface of the forme 06 pressing member 14 in the channel 07 leading opening 08 pressed. Thereafter, the holding means associated with the respective printing forme 01, arranged in the channel 07, changes again from its release position into its holding position, so that the suspension leg 13 bent at the rear edge 12 of the respective printing forme 01 is held in the channel 07 (FIG. 5).

After the folded on the rear edge 12 of the respective printing plate 01 suspension leg 13 is held in the channel 07, the respective pressure element 14 can be turned off by the lateral surface of the forme cylinder 06 (Fig. 6).

Disassembly of at least one printing form:

The forme cylinder 06 rotates up to the position at which at least one command for a separate selection of the individual printing plates 01 assigned, arranged in the channel 07 of the respective forme 06 holding means are passed to this command contactless accepting and / or dispensing device 18 can. The abutment of the printing forme 01 associated pressing element 14 is employed on the lateral surface of the forme cylinder 06. The selected by the device 18, the respective printing forme 01 associated, arranged in the channel 07 retaining means changes from its holding position to its release position, so that the bent at the rear edge 12 of each printing plate 01 suspension leg 13 due to the bending elasticity of the printing plate 01 from the channel 07 leading opening 08 jumps, which is indicated in Fig. 7 by an arrow.

The forme cylinder 06 rotates counter to its production direction into a removal position, in which it pushes the rear edge 12 of the respective printing forme 01 onto the surface of the protector 09, the suspension limb 13 bent at the rear edge 12 of this printing forme 01 rising on the surface of the protector 09 can (Fig. 8).

The abzunehmenden printing forme 01 associated pressing element 14 is turned off by the lateral surface of the forme cylinder 06, z. B. as soon as a result of the rotation of the forme cylinder 06 of this pressure element 14 and the channel 07 leading to the opening 08, on which the leading edge 02 of the abzunehmenden printing forme 01 is held radially opposite each other. The shutdown of the pressure element 14 is indicated in Fig. 9 by a directional arrow.

Fig. 10 shows a z. B. manual removal of the printing forme 01 from the forme cylinder 06 and the surface of the protection 09 - indicated by a removal arrow.

The other figures show the following:

11 shows, by way of example, a section of a 9-satellite printing unit, wherein the device for register-mounting each of at least one flexible printing form 01 is positioned differently on one of the forme cylinder 06 of this rotary printing press. In contrast to the arrangement of this device according to FIGS. 1 to 10, the protectors 09 are at least partially set tangentially to the respective forme cylinder 06 in the case of the 9-satellite printing unit shown in FIG.

Fig. 12 shows an example of a section of an H-printing unit, wherein the device for register-mounting each at least one flexible printing plate 01 is positioned on one of the forme cylinder 06 of this rotary printing press at their upper printing units different from their lower printing units. In the lower printing units, the respective protectors 09 are positioned substantially radially against the respectively associated forme cylinder 06, whereas in the upper printing units, the respective protectors 09 are set substantially tangentially against the respectively associated forme cylinder 06.

FIG. 13 shows, in an enlargement, the holding device to be aligned, which is to be aligned, according to FIGS. 1 to 12 in an unactuated position. The holding means 11 is in its normal position A, in which the surface of the protection 09 can be spaced apart by a rotational angle φ from its position in the actuated state of the holding device. The holding device is pivotable about the rotation angle φ about a preferably fixed pivot point 21. The angle of rotation φ is with respect to the area formed by the protection 09 z. B. less than 15 °, preferably less than 10 °, in particular less than 5 °. In the unactuated position z. B. the holding means 11 moving linear drive 16 from a belonging to the holding device z. B. electromechanical switch 19 spaced. Instead of a switch 19, a sensor 19, which preferably detects the respective printing form 01, may also be provided. In the case of several in the axial direction of the forme cylinder 06 juxtaposed mounting positions for each printing plate 01 is preferably provided for each of these printing plates 01 such a holding device, said holding devices jointly or individually and independently can be used.

Fig. 14 shows in an enlargement the one to be aligned printing plate 01 holding holding device according to FIGS. 1 to 12 in the position in which the printing plate 01 to be mounted is already aligned in register and retracted to a position B remote from the forme cylinder 06 position. The holding device is pivoted about the pivot point 21 by the rotational angle φ, wherein the pivoting movement is carried out due to the force exerted by hand on the printed image side of the respective printing plate 01 pressure, which is indicated by an arrow in Fig. 14, wherein the back by this pressure the printing forme 01 is brought into contact with the holding means 11 of the holding device. At the same time, the pivoted holding device also actuates the switch 19 belonging to it, which is interpreted by a preferably electronic control device belonging to the holding device as a presence of a printing plate 01 to be mounted on the surface of the protection 09. After the switch 19 has been actuated and the holding means 11 has the registered form cylinder 06 with its front edge 02 hinged printing plate 01 registered, the holding means 11 moving linear drive 16, z. As a pneumatic cylinder, operated, preferably remotely operated by the electronic control device, which is indicated in Fig. 14 by a double arrow, and by the method of the holding means 11 in a more distant from the forme cylinder 06 position B, the form cylinder 06 hinged printing plate 01 is tightened , The holding device has a preferably biased spring element 17, for. Example, a compression spring 17 which, while relaxed in the process of the holding means 11 in the form cylinder 06 distant position B, the spring travel is longer than the travel of the holding means 11 moving linear drive 16. The spring travel of the spring element 17 is shown in FIG 14 again indicated by a double arrow. The travel of the holding means 11 moving linear actuator 16 is z. B. between 250 mm and 500 mm, preferably between 300 mm and 400 mm.

Fig. 15 shows in an enlargement the one to be aligned printing plate 01 holding holding device according to FIGS. 1 to 12 in the position in which the printing plate 01 to be mounted on the forme cylinder 06 as a result of its rotational movement against the force of this printing plate 01 taut-holding spring element 17 is raised. The spring element 17 is thereby as long as compressed along its spring travel until the holding means 11 has reached the forme cylinder 06 near position C.

Fig. 16 shows a schematic representation of a detail of the instructions non-contact receiving and / or dispensing device 18, with which arranged in the channel 07 of the forme 06, the individual mounting positions on the outer surface of the forme cylinder 06 associated retaining means are selectable and operable. This device 18 may in the axial direction of the forme cylinder 06 side by side several each independently working, z. B. on a support 24 mounted transmitting and receiving units 22, to which the forme cylinder 06 each have a corresponding counterpart, ie corresponding transmitting and receiving units 23 is arranged, wherein the transmitting and receiving units 23 on the forme cylinder 06 also z. B. are arranged side by side in the axial direction. The transmitting and receiving units 23 on the forme cylinder 06 are z. B. arranged in or on the channel 07 of the forme cylinder 06 and occur z. B. through the opening 08 of the channel 07 with the outside of the forme cylinder 06 preferably stationary arranged transmitting and receiving units 22 by a preferably reciprocal transmission of control commands in an operative connection. The outside of the forme 06 arranged transmitting and receiving units 22 transmit z. B. a control command, a specific, z. B. caused by an addressing, arranged in the channel 07 of the forme cylinder 06 holding means causes to change from its holding position to its release position. The transmitting and receiving units 23 on the forme cylinder 06 can display a control device arranged outside the forme cylinder 06 in the form of a status message, in which position a particular holding means arranged in the channel 07 of the forme cylinder 06 is currently located, ie whether it is in its position Hold position or in its release position. The transmission of the respective commands preferably takes place when the transmitting and receiving units 22 arranged outside the forme cylinder 06 and the transmitting and receiving units 23 on the forme cylinder 06 radially oppose each other by a corresponding rotation of the forme cylinder 06. The outside of the forme 06 arranged transmitting and receiving units 22 may, for. B. as separately selectable and activatable magnets and the transmitting and receiving units 23 on the forme cylinder 06 may, for. B. be designed as controllable by the aforementioned magnets solenoid valves.

17 shows a detail of a printing unit designed as an H-printing unit or as a satellite printing unit with a protection 09 of the respective holding device, which is in each case rectilinearly attached to the respective forme cylinder 06. A set up on the respective protection 09, the respective forme cylinder 06 supplied printing forme 01 is bent only in each case in the context of the length of Einhänlegeels 13 at the rear end 12 of this printing forme 01 to the back of this printing forme 01 with the holding means 11 of the respective holding device in a To bring into contact, d. H. to the printing forme 01 z. B. to suck.

FIG. 18 again shows various arrangements of the holding device in a 9-satellite printing unit, but the 9-satellite printing unit of FIG. 18 differs from that of FIG. 11 in that the 9-satellite printing unit of FIG 18 has single circumferential cylinder 06, whereas the 9 satellite unit of Fig. 11 shows double peripheral cylinder 06. The respective transfer cylinders are formed both in FIG. 11 and in FIG. 18 in each case as a double-circumference cylinder, so that the transfer cylinders can each transfer two print images at their respective circumference one after the other. Einfachumfangsformzylinder 06 have along their peripheral line only a single printing plate 01, whereas double peripheral cylinder 06 can record along its circumferential line one behind the other two printing plates 01. Double circumferential cylinder 06 also have two each offset by 180 ° channels 07, whereas a Einfachumfangsformzylinder 06 has only a single axis-parallel channel 07, the opening 08 receives both the leading edge 02 and the rear edge 12 of the same printing forme 01 for their attachment to the forme cylinder 06. Due to their smaller diameter, a straight-line tangential employment of a holding device to a Einfachumfangsformzylinder 06 is more difficult to accomplish, since the space required for this in the region of the respective Einfachumfangsformzylinders 06 is very limited. A Doppelumfangsformzylinder 06 offers due to its larger diameter rather opportunity for a straight tangential employment of the protection 09 of a holding device on the circumference. On a Einfachumfangsformzylinder 06, the protection 09 of the holding device in the direction of feeding the printing forme 01 to the respective forme cylinder 06 is preferably formed at least partially curved, although the protection 09 of this holding device can also be employed tangentially to the circumference of the respective Einfachumfangsformzylinders 06. Thus, the design of the protection 09 of the respective holding device - whether the protection 09 z. B. is rectilinear or curved and / or whether it is employed radially or tangentially to the respective forme cylinder 06 - to adapt to the respective printing unit also dependent on the diameter of the respective forme 06 concrete installation conditions.

With the proposed solution, in particular the following advantages can be achieved:

Since the printing forme 01 is held frictionally by the holding means 11 in a movable in a plane, in particular pivotable retaining device, a register-oriented alignment of the suspension edge 02 together with a simultaneous fixation of the printing plate 01 is possible.

By retracting the printing forme 01 it is fixed in its aligned position after being hung on the forme cylinder 06.

By using a spring-actuated restraint device, the printing forme 01 is mounted in a defined, positionally precise, register-based manner.

The presence of a printing plate 01 can be detected automatically by a control device. The assembly of the printing form 01, d. H. in particular its winding process, can be controlled by the control device mechanically and independently.

The holding means arranged in the channel 07 of the forme cylinder 06 can be actuated separately for each printing forme 01. You are contactless z. B. switchable via magnets.

As an assembly aid for each printing plate 01 in the circumferential direction of the forme cylinder 06 only a single pressure element 14 is required, which z. B. can be configured as a on and off pressure roller 14. As a result, a pressure bar with a plurality of juxtaposed pressing elements 14 for a plurality of pressure cylinders 01 arranged next to one another in the axial direction of the forme cylinder 06 can be constructively made considerably simpler.

LIST OF REFERENCE NUMBERS

01

printing form

02

leading edge

03

suspension leg

04

edge

05

-

06

Form cylinder, single-circumference form cylinder, double-circumference form cylinder

07

channel

08

Opening, channel opening

09

protection

10

-

11

holding means

12

edge

13

suspension leg

14

Pressure element, pressure roller

15

-

16

Drive, linear drive

17

Spring element, compression spring

18

Facility

19

Switch, sensor

20

-

21

pivot point

22

Transmitting and receiving unit

23

Transmitting and receiving unit

24

carrier

A

initial position

B

from the forme cylinder further position

C

closer to the forme cylinder

φ

angle of rotation

Claims (33)

Device for mounting a flexible printing plate (01) on a forme cylinder (06) of a rotary printing machine, wherein at least one holding means (11) arranged outside the forme cylinder (06) and separated therefrom is provided, this holding means (11) being the printing forme ( 01) holds at its non-imprinted rear side at least one point of application by a frictional connection, characterized in that a sensor (19) or a switch (19) is provided, wherein between the holding means (11) and the back of the printing form (01) produced Touch contact the sensor (19) or switch (19) actuated, whereupon a control device turns on the power circuit. Apparatus according to claim 1, characterized in that the adhesion-exerting holding means (11) is designed as a suction pad, said holding means (11) sucks the printing plate (01) by a negative pressure. Device for mounting a flexible printing plate (01) on a forme cylinder (06) of a rotary printing machine, wherein at least one holding means (11) arranged outside the forme cylinder (06) and separated therefrom is provided, this holding means (11) being the printing forme ( 01) holds on its non-imprinted rear side at least one point of application by a frictional connection, characterized in that the retaining means (11) performing the frictional connection is formed as a suction gripper, this holding means (11) the printing forme (01) at its unimaged back by a Vacuum sucks. Apparatus according to claim 3, characterized in that a sensor (19) or a switch (19) is provided, wherein a between the holding means (11) and the back of the printing forme (01) produced touch contact the sensor (19) or switch (19 ), whereupon a control device locks the power turns. Apparatus according to claim 1 or 4, characterized in that the sensor (19) detects the touch contact between the holding means (11) and the back of the printing forme (01) produced. Apparatus according to claim 2 or 3, characterized in that the suction gripper is integrated in a flat surface, wherein the printing forme (01) to be mounted on this surface. Apparatus according to claim 6, characterized in that the suction gripper is arranged in a breakthrough the flat surface breakthrough. Apparatus according to claim 2 or 3, characterized in that the suction pad has a polygonal or round or oval cross-sectional area. Apparatus according to claim 2 or 3, characterized in that the suction pad has a suction chamber, wherein a pressure applied to the suction pad mold (01) seals this suction chamber. Apparatus according to claim 2 or 3, characterized in that the suction pad is pivotable about a rotation angle (φ). Apparatus according to claim 2 or 3, characterized in that the suction pad is movably mounted on a hinge. Apparatus according to claim 2 or 3, characterized in that in the axial direction of the forme cylinder (06) side by side a plurality of suction grippers are arranged, wherein the respective suction gripper each associated with a printing plate to be mounted (01) are. Apparatus according to claim 12, characterized in that in the axial direction of the forme cylinder (06) juxtaposed suction pads are jointly or individually and independently used. Apparatus according to claim 1 or 3, characterized in that the forme cylinder (06) has at least one channel opening (08) arranged axially parallel to it. Apparatus according to claim 14, characterized in that the holding means (11) hangs a front edge (02) of the printing form (01) on an edge (04) of the channel opening (08). Apparatus according to claim 14, characterized in that the holding means (11) by a movement carried out by him aligns the leading edge (02) held by the frictional pressure mold (01) parallel to the course of the edge (04) of the channel opening (08) , Apparatus according to claim 1 or 3, characterized in that between the at least one holding means (11) and the printing plate (01) formed point of application for the frictional connection in the forme cylinder (06) further half of the printing plate (01) is provided. Apparatus according to claim 1 or 3, characterized in that between the at least one holding means (11) and the printing form (01) formed point of application for the frictional connection is provided in approximately half the width of the aligned printing plate (01). Apparatus according to claim 1 or 3, characterized in that the holding means (11) at the point of application for the duration of adhesion, solid, slip and play-free connection to the aligned printing plate (01) produces. Apparatus according to claim 1 or 3, characterized in that at least one on the lateral surface of the forme cylinder (06) engagable pressure element (14) is provided. Apparatus according to claim 20, characterized in that the at least one pressure element (14) is positioned relative to the forme cylinder (06). Apparatus according to claim 20, characterized in that the at least one pressing element (14) is designed as a pressure roller (14). Apparatus according to claim 1 or 3, characterized in that in the axial direction of the forme cylinder (06) side by side a plurality of printing plates (01) can be arranged. Apparatus according to claim 20 and 23, characterized in that in the axial direction of the forme cylinder (06) side by side a plurality of pressing elements (14) are provided, wherein the respective pressing elements (14) associated with the individual printing plates (01). Apparatus according to claim 24, characterized in that the individual pressure elements (14) independently of the other pressing elements (14) on the lateral surface of the forme cylinder (06) can be adjusted or set off from this. Apparatus according to claim 1 or 3, characterized in that in the channel (07) of the forme cylinder (06) in its axial direction a plurality of the individual mounting positions on the lateral surface of the forme cylinder (06) associated Holding means are provided. Apparatus according to claim 26, characterized in that in the channel (07) of the forme cylinder (06) provided in the axial direction retaining means are independently operable. Apparatus according to claim 26, characterized in that in the channel (07) of the forme cylinder (06) provided in the axial direction retaining means in each case by a non-contact from the mold cylinder (06) to the forme cylinder (06) actuating command can be actuated. Apparatus according to claim 1 or 3, characterized in that the forme cylinder (06) as a Doppelumfangsformzylinder (06) with two mutually offset by 180 ° channels (07) is formed. Apparatus according to claim 1 or 3, characterized in that the forme cylinder (06) is formed as a Einfachumfangsformzylinder (06) with only a single axis-parallel channel (07). Apparatus according to claim 1 or 3, characterized in that the forme cylinder (06) cooperates in a printing unit with a formed as a double-circumferential cylinder transfer cylinder. Apparatus according to claim 1 or 3, characterized in that the forme cylinder (06) is arranged in a 9-satellite printing unit. Apparatus according to claim 1 or 3, characterized in that the forme cylinder (06) is arranged in a H-pressure unit.

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