EP1832419A2 - Strain relieving element - Google Patents

Abstract

The cylinder (1) has a discharge unit (6) e.g. recess, whose width is limited to both sides of two edges (7), where the discharge unit is groove shaped. A part is provided between the edges of bases (8) of the discharge unit below a level. The discharge unit is formed by a connection straight line (9) of both the edges and is extended outwardly under a cylinder barrel surface of the cylinder. Independent claims are also included for the following: (1) a support for arrangement between a transmission cloth and a circumference of a transmission cylinder (2) a method for arranging a support at a circumferential surface of a transmission cylinder.

Description

The invention relates to a relief element, which is or can be arranged on a for a printing press, in particular Rollenrotationsdruck- or offset printing machine, provided transfer cylinder.

In printing machines, it is known to transfer the printed image of a plate cylinder, on which a pressure plate is stretched and rolls on a blanket cylinder on the blanket cylinder, wherein the blanket cylinder rolls on a paper web and thus prints the printed image on the paper web. The printing plate containing the printed image is held with clamping devices on the circumference of the plate cylinder. Also, the arranged on the circumference of the transfer cylinder blanket is held with a clamping device, Such tensioning devices often have a running in the longitudinal direction of the respective cylinder groove, in particular a channel having further elements for holding the blanket or the pressure plate. In order to be able to be held by the clamping device, printing plates are provided at their in the direction of rotation leading and trailing ends in each case with a bend, which is also referred to as Abbug, wherein the bent part extends into the clamping device and is held therein.

When unrolling the tensioning device, in particular the edges of the turns of the pressure plate on the circumference of the blanket cylinder, an unevenness in the unwinding occurs. This leads to an increased force on the bends and edge drawing (printing). The unevenness in the unrolling process can also cause unwanted vibrations in the printing press.

From the prior art, it is known to match the rotations of the plate cylinder and the blanket cylinder to one another such that the tensioning devices of the two cylinders interact during unwinding by coming in contact with each revolution as it passes through the nip or nip.

In some printing presses but also plate cylinder may be provided which can accommodate more than a pressure plate over its circumference. Accordingly, several clamping devices must be provided on the circumference of the plate cylinder. Since only one clamping device is provided in the blanket cylinder, but then rolls a tensioning device on a part of the blanket cylinder, which has no tensioning device, which again leads to the above problems.

The prior art eliminates this problem in that the part of the circumference of the transfer cylinder which interacts with the additional clamping device of the plate cylinder has a relief element extending in the longitudinal direction of the transfer cylinder. The relief element consists of a circumferentially provided flattening, which reduces the force acting on the bends of the printing plates during rolling.

An object of the invention is to improve the printing quality in a generic printing press.

The object is achieved by the features of the independent claims. Advantageous developments emerge from the dependent claims.

The invention lies in a particularly ausgestalt relief element, which is located on the circumference of a transfer cylinder, for example a printing unit. The printing unit or the transfer cylinder may be part of a printing press, in particular a rotary printing press or an offset printing press. By "located on the periphery" not only the formation of the relief element by the transfer cylinder but also the formation of the relief element to or from a directly or indirectly connected to the transfer cylinder element can be understood. Such an element can in particular be plate or layer-shaped, which may be arranged, for example, at least partially or approximately completely over the circumference or the peripheral surface of the transfer cylinder. An element disposed directly on the circumference of the transfer cylinder may, for example, be in direct contact with the circumference of the transfer cylinder, in particular adhesively bonded or adhering by adhesion or at least adjacent to the circumference. An element arranged indirectly on the circumference of the transfer cylinder can, for example, be in indirect contact with the circumference of the transfer cylinder, for example, if there is another, preferably thin, element, in particular a support, between the element and the transfer cylinder.

A system according to the invention may comprise the transfer cylinder and a plate cylinder rolling on the circumference of the transfer cylinder. This means that the circumference of the plate cylinder or an outer circumference of the circumference of the plate cylinder arranged covering, in particular a pressure plate on the circumference of the transfer cylinder or on the outer periphery of the periphery of the transfer cylinder pad, in particular a transfer or blanket, a pad or a rubber flooring, unrolls. Between the successive rolling circumferences z. B. a small distance, such as. As gap or nip exist. Preferably, the circumferentially rolling circumferences at least during operation touch. It would be conceivable, for example, that the plate cylinder and / or the transfer cylinder can be adjusted so that the distance between the cylinders or their cylinder axes is adjustable. In particular, this can be used to set a printing gap or nip or the width of the nip.

The plate cylinder may have at least one mounting device for a printing plate. The fastening device may extend in the longitudinal direction of the plate cylinder. In particular, the attachment means may comprise a channel or groove which may extend in its or its depth from the outer circumference of the plate cylinder towards the interior of the plate cylinder. The fastening device may further comprise elements which may preferably be located within the channel or the groove. The fastening device can in particular hold at least one end of a printing plate. For this purpose, the pressure plate can have at least one end which having a bend which extends into the fastening device, in particular its groove to z. B. to be held by the elements contained in the groove of the fastening device. In particular, the pressure plate, viewed in the direction of rotation, be held at its leading end and at its trailing end in a common fastening device or its groove or in different fastening devices or their grooves. In one example, a single fastening device may be provided for the pressure plate, the pressure plate extending approximately completely around the circumference of the plate cylinder and being held with its leading and trailing ends in the fastening device. In another example, a plurality of fasteners, such as, B, two fasteners, may be disposed on the perimeter of the plate cylinder, with one end of the platen being held in one fastener and the other end of the platen being in the other fastener. In particular, the fastening devices can be distributed approximately uniformly over the circumference, and / or between the fastening devices in each case a pressure plate can be clamped or clamped. The fastening device, in particular its groove can have a width of 1 to 30 mm. Particularly preferably, the fastening device may be a so-called mini-cap and / or have a groove width of about 1 to 5 mm, and more preferably 2 to 3 mm.

On the transfer cylinder can be arranged approximately at its periphery at least one extending in the longitudinal direction of the transfer cylinder relief element. The at least one relief element can be z. B. extend over the measured along the longitudinal axis of the cylinder width, in particular printing width of the cylinder, z. B. be continuous. The at least one relief element can, for. B. in several along the width of the cylinder juxtaposed printing plates also be divided into several along the longitudinal direction one after the other subsequent partial relief elements, preferably each pressure width can be assigned a partial relief element. For example, a plurality of relief elements can preferably be arranged uniformly over the circumference of the transfer cylinder. Preferably, a number of relief elements can be provided on the circumference of the transfer cylinder, which is 1 less than the number of fasteners provided on the plate cylinder. For example, at two provided for the plate cylinder fasteners on the transfer cylinder a relief element may be provided. In particular, at least one, preferably exactly one fastening element can be provided on the transfer cylinder, with which an attachable to the circumference of the transfer cylinder transfer or blanket can be attached. If reference is made to a blanket, this also applies accordingly to a transfer cloth. For example, the blanket may extend substantially over the circumference of the transfer cylinder. The blanket can be arranged with its seen in the direction of rotation leading and trailing ends in the fastener or be. For this purpose, the blanket z. B. bends at the ends, so that the bent ends in z. B. extend a groove of the fastening device. In particular, mutatis mutandis, the same can apply to the fastening device for the blanket, as for the fastening device for the printing plate or printing plates on the plate cylinder.

The plate cylinder and the transfer cylinder can roll on each other so that one of the at least one fastening device of the plate cylinder interacts with the discharge element of the transfer cylinder. In particular, the plate cylinder and the transfer cylinder with respect to their rotational movement can be coordinated so that the fastening device and the relief element z. B. at each revolution simultaneously through the pressure nip or nip. In particular, plate cylinders and transfer cylinders may have equal angular velocities. It is particularly preferred that the sum of the at least one relief element of the transfer cylinder and the at least one fastening means of the transfer cylinder can be equal to the number of fasteners arranged on the circumference of the plate cylinder. For example, the fastening means of the transfer cylinder and / or the relief elements of the transfer cylinder may be distributed over the circumference at the same pitch as the fastening means provided or provided on the plate cylinder (s). According to the invention, this ensures that a fastening device of the transfer cylinder or a discharge element of the transfer cylinder is provided for each attachment device of the plate cylinder. Preferably, for each fastener of the plate cylinder passing through the nip, an attachment means or relief member of the transfer cylinder passes through the nip or nip in an interactive manner. It is particularly preferred in that the bends of the ends of the pressure plate (s) held in a fastening device of the plate cylinder interact with the fastening device with a fastening device or a relief element of the transfer cylinder.

For example, in one embodiment, the plate cylinder may include two fasteners and the transfer cylinder may include a fastener and a relief member. The rotations of the plate cylinder and the transfer cylinder can be coordinated so that interact per revolution, a fastening device with the other fastening device and a fastening device with the relief element.

The relief element can, for. B. groove-shaped or channel-shaped. In particular, the relief element may have a width which is limited on both sides by one edge in each case. In particular, such an edge can be formed by a side wall or groove flank of the groove. Particularly preferably, the edge is understood, which is formed from a groove flank and an inner or outer circumferential surface. The width of the groove may extend or be provided in the circumferential direction of the transfer cylinder.

The invention is characterized in particular by the fact that the at least one relief element is groove-shaped and / or a part of a lying between the edges of the ground at least one relief element is below a level which is formed by the connecting line of the two edges. This at least one part or section can be z. B. located at one or more locations between the edges. For example, this part can be arranged in the region of the edges or / and approximately in the middle between the edges. The reason of the at least one relief element may be between the two edges z. B. completely or at least partially below the level, which is formed by the connecting line of the two edges. For example, part of the reason such. B. the central region, even above the level, wherein preferably the part or parts of the ground in the region of the edges is below the level or lie.

Preferably, the part of the ground may be at a distance of 0.1 mm to 1 mm, preferably 0.1 to 0.5 mm and more preferably 0.2 to 0.5 mm below the level.

Preferably, the relief element may have a width which is greater or slightly larger or approximately equal to the width of the particular intended for the interaction fastening means of the plate cylinder. In particular, the between the edges of one or at least one relief element may have a circumferentially extending distance of at least 2 mm to a maximum of 30 mm, preferably 5 mm to 20 mm.

The advantage of placing part of an inter-edge ground of the at least one relief element below a level formed by the connecting straight lines of the two edges is that the distance between the edges in the circumferential direction is reduced in contrast to the prior art can, which is a particular advantage in particular in fastening devices in the form of Minigap clamping devices. According to the embodiment of the relief element according to the prior art can take place no reliable relief in minigap jigs or the width of the relief element would have to be much larger than the width of the Minigaps, which in turn could lead to disadvantages.

In preferred embodiments, the edges of the at least one relief element or the relief element of at least one of transfer cylinder, arranged on the transfer cylinder pad, arranged on the transfer cylinder transfer or blanket and a arranged on the transfer cylinder pad can be formed. For example, the relief element having, for example, edges and a bottom can be formed by a single one of these elements or by several of these elements, or vice versa. For example, an underlying element may form the bottom and the overlying element the edges.

The relief element may preferably be a recess or groove which extends from the outside under the cylinder jacket surface of the transfer cylinder. The relief element can, for. B. formed by prototyping, forming or separating on the transfer cylinder become. Forming can, for. B. forging and separating can z. B. be a material-removing machining, in particular milling, grinding, erosion or another machining process.

In another embodiment, the relief element may be a recess or groove which extends from below the outer surface or from the inside under the inner surface of a lining arranged on the transfer cylinder or breaks through a lining arranged on the transfer cylinder. The coating can z. B. be applied on the circumference of the transfer cylinder rubber layer. The rubber layer can z. B, glued or vulcanized or solvable z. B. be applied by adhesion or by overstretching on the circumference of the cylinder. In particular, the pad may be in direct contact with the peripheral surface of the transfer cylinder. The relief element can be z. B. from the inner peripheral surface, which is formed by the contact surface to the transfer cylinder, extend into the covering. The relief element may also extend from the outside, in particular the outer peripheral side into the covering. In another embodiment, the relief element can be a z. B. be approximately completely enclosed channel, which is located in pavement. Such a channel may for example have an elongate cross-sectional shape, in which the width measured in the circumferential direction clearly outweighs the height measured in the radial direction. For example only, an elliptical or square cross-sectional shape of the channel may be mentioned. The said ratio between width and height can of course also apply correspondingly to a groove-shaped relief element.

In a further embodiment, the relief member may be a recess extending from under the outer surface or from the inside under the inner surface of an overlying member support such as a liner disposed on the transfer cylinder. B. extends a blanket or breaks through a arranged on the transfer cylinder pad for an overlying element. The pad can, for. B. serve to adjust the circumferential length or the diameter of the transfer cylinder for a correction of the printing length. The relief element may be arranged in the base, such as. B. in the coating. Preferably, the relief element may break the pad or pad. The pad or pad can over the circumference of the transfer cylinder be arranged, wherein the relief element is formed in the shape of a recess or a distance between two ends or abutting edges of the pads or the pads or the documents. The ends or abutting edges may be spaced in the circumferential direction of the transfer cylinder, wherein the recess formed by the distance forms the relief element.

The pad or pad can z. B. be provided with an adhesive with which the pad or pad can be attached to the circumference of the transfer cylinder. In a preferred alternative, the pad can be attached to the underside, ie to the transfer cylinder associated side of a conventional transfer sheet. The attachment of the pad can be made locally eg by a person who upgrades the machine for a print production, or already at the factory, which is particularly advantageous for the combination pad / transfer cloth. If an adhesive layer is provided on the substrate for the attachment, it is preferable to provide an adhesive that leaves no adhesive residue on the transfer cylinder or the transfer fabric when the substrate is removed from the transfer cylinder or transfer fabric. It is conceivable that the pad is sold separately, wherein it is generally preferred that the adhesive layer - if the pad has not yet been arranged on the transfer cylinder or transfer fabric - covered with a peelable cover to protect the adhesive layer from contamination and from accidental sticking , The pad may, in particular, be a thin areal extended body which has perforations or cuts at the edges provided for the at least one relief element. In particular, the covering or the base may have a length which corresponds approximately to the circumference of the transfer cylinder. In particular, the pad can be shortened, starting from the circumferential length by the amount that is provided for the relief element. For example, the pad according to the desired number of relief elements prefabricated, namely having pre-cut or pre-perforated edges of relief elements. The strips formed between the cuts or perforations may form the relief element or elements by removal thereof, for example after the backing has been attached to the desired article.

For example, a pad may be a plastic or metal foil or a cardboard or paper. In particular, the thickness of the pad may correspond to the preferred distance of the part of the ground which is below the level formed by the straight line of the edges.

In another embodiment, a plurality of liners or underlays may be provided on the transfer cylinder, which are arranged over its circumference, that the mutually facing ends of two adjacent documents are arranged with such a distance that the distance between the ends of the width of the relief element corresponds , Alternatively, the surface of the peripheral cylinder can be completely coated with a base, wherein at the desired locations for a relief element or for a fastening device in each case a strip is removed, whose width corresponds to that of a relief element. In particular, the edges of the strip may be pre-cut or pre-perforated or cut or perforated in the state disposed on the transfer cylinder to be removed to form a relief member.

In a further embodiment, a transfer cloth arranged on the circumference of the transfer cylinder, in particular a blanket, can have a substantial transfer layer, in particular a rubber layer, which is not extensibly arranged in the circumferential direction of the cylinder. The relief member may be a recess or groove extending from underneath the outer surface or from underneath the inner surface of the transfer fabric. The transfer fabric may comprise a carrier layer and a transfer layer. The carrier layer may, for. B. serve to make the transfer sheet in the circumferential direction of the transfer cylinder substantially or in contrast to the transfer layer not stretchable. Further, the backing layer may serve to secure the transfer fabric in the fasteners or in the fastener. Preferably, the carrier layer has the bends for attachment to the transfer cylinder. The carrier layer may, for. B. may be arranged on the transfer cylinder facing side of the transfer sheet. The carrier layer may, for. B. be made of a fabric, in particular a metal fabric or a textile fabric. The carrier layer can also be a film, in particular a metal foil or a metal sheet the transfer layer is arranged. The carrier layer can be arranged, for example, within the transfer layer. B. in addition to the carrier layer still have layers that can reduce the extensibility of the transfer sheet in the circumferential direction.

The at least one relief element may be a recess which extends from the outside or from the inside under the surface of the carrier layer or the transfer layer or breaks through the transfer layer and / or the carrier layer. For example, the at least one relief element can also be formed in the transfer fabric, preferably in the transfer layer, so that the relief element is enclosed by the transfer fabric or the transfer layer inside and outside.

An inventive transfer cloth can, for. B. at least one relief element, which would extend or extend in a state arranged on the transfer cylinder in the longitudinal direction of the transfer cylinder. Preferably, at least one of the transfer cloth and the carrier layer has the relief element. In particular, for the transfer cloth, as well as z. B. preferred for the covering or the base, that the width of the at least one relief element is bounded on both sides by one edge, wherein a portion of the lying between the edges of the bottom of the at least one relief element, in particular arranged in a on the circumference of the transfer cylinder State or in a developed state, below a level formed by the connecting line of the two edges.

Figur 1

einen auf einem Übertragungszylinder abrollenden Plattenzylinder,

Figur 2

einen Übertragungszylinder aus dem Stand der Technik,

Figur 3

einen Übertragungszylinder mit einem erfindungsgemäßen Entlastungselement,

Figur 4

einen Übertragungszylinder mit einem weiteren erfindungsgemäßen Entlastungselement,

Figur 5

einen Übertragungszylinder mit einem weiteren erfindungsgemäßen Entlastungselement,

Figur 6

eine Querschnittsansicht entlang der Umfangsrichtung eines abgewickelten Gummituchs,

Figur 7

eine Querschnittansicht entlang der Umfangsrichtung eines abgewickelten Gummituchs und

Figur 8

eine Querschnittsansicht entlang der Umfangsrichtung eines abgewickelten Belags oder einer abgewickelten Unterlage.

Advantageous embodiments of the invention will be described below with reference to figures. The features that become obvious in this case can also advantageously further develop the invention in combination.

FIG. 1

a plate cylinder rolling on a transfer cylinder,

FIG. 2

a transfer cylinder of the prior art,

FIG. 3

a transfer cylinder with a relief element according to the invention,

FIG. 4

a transfer cylinder with a further relief element according to the invention,

FIG. 5

a transfer cylinder with a further relief element according to the invention,

FIG. 6

a cross-sectional view along the circumferential direction of a developed blanket,

FIG. 7

a cross-sectional view along the circumferential direction of a developed blanket and

FIG. 8

a cross-sectional view along the circumferential direction of a developed covering or unwound pad.

Figure 1 shows a plate cylinder 2, which has two Befestigungscimichtungen 5. The diametrically opposite fastening devices 5 each have a groove, in which further retaining elements (not shown) for holding ends of a pressure plate 3 are arranged. At the periphery of the plate cylinder 2, two pressure plates 3 are each arranged or clamped between the two fastening devices 5. The pressure plates 3 have bends 4, which extend into the fastening device 5 and are held therein. The printing plates 3 have ink-receiving and ink-repellent points which serve to transmit a printed image to a transfer cylinder 1.

The outer periphery of the plate cylinder 2 formed by the pressure plates 3 rolls on an outer periphery of the transfer cylinder 1 formed by a blanket 11, whereby the printed image of the plate cylinder 2 is transferred to the blanket 11. The blanket 11 extends over the circumference of the transfer cylinder 1 and is held by a fastening device 10. The fastening device 10 has, such. As shown in Figure 3, extending in the longitudinal direction of the transfer cylinder 1 groove 15 in which further fasteners (not shown) for holding the ends of the blanket 11 are. The blanket 11 has bends that extend into the fastening device 10, in particular in the groove 15, whereby the blanket 11 is held firmly on the circumference of the transfer cylinder 1.

The angular position and the angular velocity of transfer cylinder 1 and plate cylinder 2 are coordinated so that during a rotation of the transfer cylinder 1 and the plate cylinder 2, the fastening means 10 of the transfer cylinder 1 and one of the two Befestigungsseimichtungen 5 of the plate cylinder 2 during the passage of a nip or a pressure nip, namely where the plate cylinder 2 and the transfer cylinder 1 interact, at the same time through the pressure nip or nip. At about half an additional revolution, the other fastening device 5 of the two fastening devices 5 passes through the pressure nip, no fastening device 10 being present at the corresponding angular position of the transfer cylinder 1, which interacts with the other fastening device 5 or can simultaneously pass through the nip or pressure nip. As a result, the bends 4 of the pressure plates 3 held in the other fastening device 5 would be subjected to a greater load than the bends 4 of the fastening device 5, which can interact with the fastening device 10 of the transfer cylinder 1, which results in the initially mentioned problems with regard to print quality.

At the point of the circumference of the transfer cylinder 1, which interacts with the other fastening means 5 of the plate cylinder 2, therefore, a relief element 6 is provided, which relieves the bends 4 of the printing plates 3.

As shown in Figure 2, a relief element 6 is known from the prior art, which is formed in the shape of a circumferentially formed, extending in the longitudinal direction of the transfer cylinder 1 flattening. Where the circumference of the flattening, cutting lines or edges arise 7. On the connecting line between the edges 7 is the bottom 8 of the relief element 6. The reason 8 points to the mental continuity, which is represented by a dash-dotted curved line , a maximum distance s. The edges 7 have a distance b to each other. The dimension s is dependent on the radius and the width b.

FIG. 3 shows a transfer cylinder 1 according to the invention which has a relief element 6 which extends along the longitudinal axis of the transfer cylinder 1. The groove-shaped relief element 6 has a width b, which is measured between two edges 7. The relief element 6 has a base 8, in particular a groove bottom, which has a distance t from the imaginary connecting straight line 9 of the two edges 7, shown in dot-dash lines. The groove bottom 8 is approximately flat and approximately parallel to the imaginary Connecting line 9. The relief element 6 is limited in terms of the width b of two groove flanks. The groove flanks can, for example, be approximately perpendicular to the groove base or extend approximately in the radial direction. The relief element 6 can be produced, for example, by milling or another production method mentioned herein. Diametrically opposite the relief element 6 is a groove 15 for the fastening device 10 (Figure 1).

Figure 4 shows a transfer cylinder 1 with a relief element 6 according to the invention. The relief element 6 is groove-shaped and extends along the longitudinal axis of the transfer cylinder 1. The relief element 6 has a width b measured between the edges 7. The relief element 6 has a base 8, in particular a groove bottom, which is curved. The groove bottom can be arbitrarily curved, such as convex. As shown here, the groove bottom is curved with the radius corresponding to the outer radius of the transfer cylinder 1 minus the measure t ₂ . The dimension t ₂ , as shown here, corresponds to the distance that the part of the base 8 that is in the region of the edges 7 is. At least this part can be below the level of connecting edges 9 connecting the edges 7. Due to the curvature of the base 8, the part of the bottom 8, which is located approximately in the middle between the edges 7, a smaller distance t ₁ to the level formed by the connecting line 9, as the part of the bottom 8 in the Edges 7. The distance t ₁ may also be 0, or a part of the ground 8 located between the edges 7 may also be above the level formed by the connecting line 9, as long as part of the ground 8 is below that of the connecting line 9 level is formed. In particular, the base 8 of the relief element 6 shown in FIG. 4 is convex.

FIG. 5 shows a relief element 6 which has a concave bottom 8. The relief element 6 has a width b measured between the edges 7. The located approximately in the middle between the two edges 7 part of the bottom 8 of the relief element 6 has a distance t to the level formed by the connecting line of the two edges 7. The reason, in particular a part of the reason 8, is below the level of the connecting line 9. As shown in FIG. 5, the edges 7 may also be rounded be. The edges 7 can z. B. be defined where the connecting line 9 touches the rounded edge areas

Figure 6 shows a cross-sectional view of a developed blanket along its direction provided for the circumferential direction. The blanket 11 shown by way of example is subdivided into areas A, B, C and D for purposes of illustration, each of which has a different embodiment of a relief element 6. The blanket 11 comprises a carrier layer 13 and a rubber layer 12 applied to the carrier layer 13. The carrier layer 13 has a thickness d ₁₃ and the rubber layer 12 has a thickness d ₁₂ . B. a thickness d ₁₃ of about 100 to 500 microns, in particular 200 to 300 microns or 250 microns. The rubber layer can z. B. have a thickness d ₁₂ of 1000 to 3000 microns, in particular 1950 microns.

As shown in Sections A to D of FIG. 6, the relief member 6 is located in the rubber layer 12. The relief member 6 is formed in the regions A and C as a groove whose bottom 8 is also formed by the rubber layer 12. In the region A, the relief element 6 extends from the outer peripheral side below the level of the imaginary between the edges 7 connecting line. In the region C, the relief element 6 extends from the direction of the inner, i. the cylinder-facing peripheral surface in the rubber layer below the level which is formed by the imaginary between the edges 7 connecting line. In region B, the relief element 6 is formed as an interruption of the rubber layer 12, the base 8 of the relief element 6 being formed by the carrier layer 13. The relief element 6 shown in region D comprises a channel completely enclosed by the rubber layer 12, which may in particular have a cross-sectional shape of a rectangle.

FIG. 7, like FIG. 6, shows a rubber blanket 11, different embodiments of a relief element 6 for the carrier layer 13 being indicated in the regions A, B and C, respectively. The embodiments of a relief element 6 shown in the areas A and C each have a depth t, which is in particular smaller than the thickness d _{13 of} the carrier layer 13, wherein the carrier layer 13 forms the bottom 8 of the relief element 6. The carrier layer 13 may, for. B. be made of metal. The relief elements 6 can z. In the carrier layer 13 may be embossed or produced by another manufacturing method mentioned herein. In region B, the relief element 6 is formed by a complete opening of the carrier layer 13, the base 8 of the relief element 6 being formed by the rubber layer 12. In the region A, the relief element 6 extends from the inner peripheral surface of the blanket 11 below the level formed by the connecting straight line connecting the edges 7. The same applies to the relief element of Figure 6 with the difference that the relief element 6 extends from the direction of the outer peripheral surface of the blanket 11 below the level of connecting the edges 7, imaginary connecting line.

Figure 8 shows a coating 14 or a pad 14, the z. B, as an outer layer on a circumference of the plate cylinder 1 or as an intermediate layer z. B. can be arranged to cover with a blanket 11 or a conventional blanket on the circumference of the transfer cylinder 1. In other words, the pad 14 can be placed between transfer cloth 11 and cylinder 1, using e.g. can be attached to the transfer cloth 11 or the cylinder 1. For this purpose, the pad 14 may have an adhesive layer (not shown), the z. B. is covered by a peelable film prior to attaching the pad to the desired object to protect the adhesive layer. Furthermore, an adhesive may be used for the adhesive layer, which leaves no adhesive residue when removing the pad 14 from the object to which the pads 14 was attached.

In the following, the pad 14 or the pad 14 is referred to only as a pad 14. In the areas A, B and C, different embodiments of the relief element 6 are indicated. The pad 14 has a thickness d ₁₄ . The relief elements 6 in the areas A, B and C each have a width b. The relief elements 6 from the areas A and C have a depth t, which is less than the thickness d _{14 of} the pad 14, whereby the bottom of the relief element 6 is formed by the pad 14. The relief element 6 shown in region A extends from the outer peripheral surface below the level formed by the imaginary connecting straight line connecting the edges 7. The relief element 6 shown in Figure C extends below the level from the inner circumferential surface. The relief element 6 shown in area B consists in a Interruption of the pad 14, wherein the mutually facing abutting edges of the pad have a distance b, which forms the relief element. The reason of the relief element 6 is formed by an element disposed above or below, in particular by the peripheral surface of the transfer cylinder 1, when the pad 14 z. B. is arranged on the transfer cylinder 1. The pad 14 may, for. B. are glued to the transfer cylinder. The relief members 6 may be made by a manufacturing method described herein. In particular, the relief elements 6 shown in regions A and C can be produced by impressing. The pad 14 may, as not shown in FIG. 8, comprise a relief element 6, as the rubber layer 12 has in the region D of FIG. In particular, the relief element 6 shown in area B can be achieved by adhering ends of the base 14 to each other at a distance b or by pre-perforating the base 14 at the edges 7 at a distance b or by precutting the base 14 at the edges 7 at the distance b are generated, wherein at pre-cut or pre-perforated edges 7, in particular after placement on the circumference of the transfer cylinder 1 located between the edges 7 strips with the width b is removed.

Claims (25)

System comprising a transfer cylinder (1), in particular for a transfer blanket (11), and a plate cylinder (2), a) wherein the plate cylinder (2) has at least one fastening device (5) extending in its longitudinal direction for at least one pressure plate (3) and b) on the transfer cylinder on the circumference at least one in the longitudinal direction of the transfer cylinder (1) extending relief element (6) is arranged, c) wherein the plate cylinder (2) and the transfer cylinder (1) can roll on one another such that the at least one fastening device (5) interacts with the relief element (6), d) wherein the width (b) of the at least one relief element (6) is bounded on both sides by a respective edge (7),
characterized in that e) the at least one relief element (6) is groove-shaped or a part of a lying between the edges (7) base (8) of the at least one relief element (6) below a level, of the connecting line (9) of the two edges (7 ) is formed. A system according to claim 1, wherein the at least one attachment means (5) for at least one pressure plate (3) has a narrow channel and in particular is a minigap tensioning device. System according to one of the preceding claims, wherein the at least one fastening device (5) for holding at least one pressure plate (3) bent end portions (4) of the pressure plate (s) (3) can engage. Transfer cylinder (1), on the circumference of which a discharge element (6) extending approximately in the longitudinal direction of the transfer cylinder (1) is arranged, a) wherein the width (b) of the at least one relief element (6) is bounded on both sides by a respective edge (7),
characterized in that b) the at least one relief element (6) is groove-shaped or a part of a lying between the edges (7) base (8) of the at least one relief element (6) below a level which of the connecting line (9) of the two edges (7 ) is formed. Transfer cylinder (1) according to claim 4, wherein the edges (7) of the at least one relief element (6) of at least one of transfer cylinder (1), a arranged on the transfer cylinder (1) pad (14), arranged on the Übrtiagungszylinder transfer cloth, in particular rubber blanket and one on the transfer cylinder (1) arranged covering (14) are formed. Transfer cylinder (1) according to claim 4 or 5, wherein the at least one relief element (6) is a recess which extends from the outside under the cylinder jacket surface of the transfer cylinder (1). Transfer cylinder (1) according to claim 4 or 5, wherein the at least one relief element (6) is a recess which extends from the outside or inside under the surface of a cover (14) arranged on the transfer cylinder (1) or one on the transfer cylinder (10). 1) arranged covering (14) breaks through. Transfer cylinder (1) according to claim 4 or 5, wherein the relief element (6) is a recess which extends from the outside or inside under the surface of a transfer roll (11) arranged on the transfer cylinder (1) pad or one on the transfer cylinder (1) arranged underlay (14) for a transfer cloth (6) breaks through. Transfer cylinder (1) according to claim 4 or 5, wherein a transfer cloth (11) arranged on the circumference of the transfer cylinder (1) has a transfer layer which is not extensible substantially in the circumferential direction of the transfer cylinder (1), in particular rubber layer, wherein the relief element (6) is a recess which extends from radially outside or from inside under the surface of a carrier layer (13) or the transfer layer (12), or the transfer layer (12) or the carrier layer (13 ) breaks through. Transfer cylinder (1) according to claim 4 or 5, wherein on the circumference of the transfer cylinder (1) a covering (14) or more pads (14) are arranged, in particular glued, wherein two ends in the circumferential direction of the transfer cylinder (1) are spaced, wherein the formed by the distance (b) recess forms the relief element (6). Transfer cylinder (1) according to claim 4 or 5, wherein the edges (7) of the at least one relief element (6) have a circumferentially extending distance of at least 2 mm to a maximum of 30 mm, preferably 5 mm to 20 mm. Transfer cylinder (1) according to claim 4 or 5, wherein the part of the base (8) is at a distance of 0, 1 mm to 1 mm, preferably 0.1 mm to 0.5 mm, and more preferably 0.2 to 0, 5 mm below the level. Transfer cloth (11), in particular blanket, for placement on a circumference of a transfer cylinder, the transfer blanket comprising a transfer layer (12), characterized in that the transfer blanket (11) has at least one release element (6) in one of the transfer cylinder (1) arranged state would extend in the longitudinal direction of the transfer cylinder (1), A transfer fabric according to the preceding claim, wherein the transfer fabric (11) comprises a carrier layer (13) and the transfer layer (12) is disposed on the carrier layer (13), at least one of transfer layer (12) and carrier layer (13) forming the relief element (6 ) having. Transfer fabric according to the two preceding claims, characterized in that the width (b) of the at least one relief element (6) on both sides of each an edge (7) is limited, wherein the at least one relief element (6) is groove-shaped or a part of lying between the edges (7) base (8) of the at least one relief element (6) is below a level which is of the connecting line ( 9) of the two edges (7) is formed. Transfer cloth according to one of the three preceding claims, wherein the relief element (6) is a channel completely enclosed in cross-section. Underlay (14) for arrangement between a transfer cloth and the circumference of a transfer cylinder (1), characterized in that the support (14) has at least one relief element (6) arranged in a state on the transfer cylinder (1) in the longitudinal direction of the transfer cylinder Transfer cylinder (1) would extend. Pad (14) according to the preceding claim, characterized in that the width (b) of the at least one relief element (6) on both sides by one edge (7) is limited, wherein the at least one relief element (6) is nutförming or a Part of a lying between the edges (7) reason (8) of the at least one relief element (6) is below a level formed by the connecting line (9) of the two edges (7). Pad (14) according to claim 16 or 17, wherein the pad (14) is a film, in particular a plastic or metal foil, or a cardboard or paper. A pad (14) according to any one of the three preceding claims, wherein the pad (14) has a respective perforation extending at the edges (7) of the relief element (6) permitting removal of the strip formed between the perforations. Pad (14) according to one of the four preceding claims, wherein the pad (14) on the transfer fabric, which has at least one transfer layer (12), or on the periphery of the transfer cylinder (1) can be fastened. A pad (14) according to any one of the preceding claims, wherein the backing for attachment comprises an adhesive layer. A pad (14) according to the preceding claim, wherein the adhesive layer is covered by a protective film prior to securing the pad (14) and / or an adhesive is used for the adhesive layer which allows the attached pad (14) to be peeled off. Method for arranging a base (14) on the circumferential surface of a transfer cylinder (1), wherein the base (14) is adhesively bonded, characterized in that subsequently to form a relief element (6), a strip extending in the longitudinal direction of the transfer cylinder (1) Pad (14) is deducted. Method according to the preceding claim, wherein the edges (7) of the strip are pre-cut or pre-perforated or cut or perforated in the affixed state.

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