DE102005029167A1 - Pressure cylinder lining, combination of pressure cylinder and pressure cylinder lining as well as pressure cylinder with clamped attached pressure cylinder lining - Google Patents

Abstract

Pressure cylinder lining, the one dimensionally stable angled leading clamping flange (8a) and has a dimensionally stable angled trailing clamping flange (8b), wherein the clamping flanges (8a, 8b) each with a subsequent area the impression cylinder pad (8) has an at least substantially right angle (α-β) which between each subsequent Area of Druckzylinderbelags (8) and a tangent to the free End of the respective clamping flange (8a, 8b) is measured. The clamping flanges (8a, 8b) are the same shape, or / and it is at least the leading Clamping flange (8a) flat.

Description

The The invention relates to a coating on a circumference of a printing cylinder a rotary printing machine can be placed and in a clamping channel or two circumferentially offset from one another arranged clamping channels of Pressure cylinder is clamped fastened. The covering will be below referred to as Druckzylinderbelag. He serves the color transfer and may in particular be a printing plate, preferably a printing plate, for a printing form cylinder or a blanket for be a blanket cylinder. The invention further relates a combination of impression cylinder and Druckzylinderbelag and finally a printing cylinder to which a printing cylinder pad attached by clamping is. The invention generally aims at rotary printing, In particular, however, she is concerned with web offset printing.

Widely used is the attachment of impression cylinder linings in axial clamping channels or a single clamping channel of a printing cylinder. For this type of attachment, the impression cylinder linings are angled at their relative to the direction of rotation of the respective printing cylinder end and an opposite, trailing end, so that at the leading end and the trailing end ever a short clamping flange is obtained, with which the respective impression cylinder cover in the clamping channel or a respective clamping channel protrudes and is clamped there by means of a clamping device. The printing cylinder coverings are usually plate-shaped, flexurally elastic body, such as printing plates, or have such a body as a carrier for a softer surface, as may be the case with blankets, for example. The leading and the trailing clamping flange are angled in each case in the known pressure cylinder linings dimensionally stable. The leading clamping flange subtends an acute angle of, for example, 40, 50 or 60 ° with the area of the impression cylinder pad which adjoins the other side of the edge obtained by the bend to project into the respective clamping channel its congruent shaped leading edge engage behind and in this way to secure the leading end positive and non-positive. The trailing clamping flange is angled for attachment separately from the leading end in its own nip at a right angle or for attachment together with the leading end of the same or another Druckzylinderbelags obtuse, for example, including an angle of 120 °. Such Druckzylinderbeläge are from the DE 103 14 343 A1 , USP 4,421,024, USP 4,577,560 and US Pat DE 195 09 561 A1 known. While these pressure cylinder coverings at the leading and trailing ends each have a flat clamping flange, the DE 100 03 937 A1 a Druckzylinderbelag before, which is initially angled at its leading end at right angles and then bent in order to secure the leading end in the clamping channel. The trailing clamping flange can be shaped accordingly or simply angled right angled and flat.

The known printing cylinder coverings Although pressure cylinders allow a secure attachment of the respective Pressure cylinder pads on the printing cylinder, attaching and removing However, the impression cylinder pad is cumbersome and increases in particular the complexity of change machines for one fully automatic change of printing cylinder coverings. Complex fully automatic machines USP 5,709,150 and more particularly USP 4,727,807 A reasonably priced alternative offer semi-automatic, with which the trailing ends of the printing cylinder coverings for attaching pressed the respective printing forme in the clamping channel and for removal from the Clamp channel to be pulled while the leading end is hooked in and removed by hand. Such a change machine and its use as a semi-automatic machine describes PCT / EP2005 / 004937.

It An object of the invention to facilitate the change of printing cylinder coverings, the However, each impression cylinder cover safely on a printing cylinder to fix.

The Invention is based on a pressure cylinder lining, which is on a leading End and one opposite, trailing end depending on a dimensionally stable angled clamping flange having. The trailing end may be conventionally shaped, i. H. its clamping flange, which in the following as a trailing clamping flange is designated, can be angled at least substantially at right angles be. At least this corresponds to preferred embodiments. Basically the trailing clamping flange with the adjoining area of the Printing cylinder pad, from which it is angled, also a clear larger angle include as 90 °, for example an angle of 110, 120 or 130 ° or optionally also one even duller angle. It is merely to ensure that the trailing Protruding clamping flange in a clamping channel of a printing cylinder can. An at least substantially right angle is preferred, however, because such a trailing end made particularly easy pulled the clamping channel and pressed into the clamping channel can.

To the invention is the clamping flange of the leading pressure cylinder end, hereinafter referred to as the leading clamping flange, under an at least substantially right angle to the connection area the printing cylinder pad, of which the leading clamping flange under Formation of a leading edge protrudes. The leading end can therefore particularly easy to put into a clamping channel, namely simple pressed into the clamping channel, and from the clamping channel, d. H. a clamping gap formed in the clamping channel, to be pulled. A change machine must be used to attach and detach the leading pressure-forming only a home-made unavoidable, with respect to the axis of rotation of the printing cylinder radial or at least perform essentially radial feed or Austellbewegung. in the ideal ideal case act in the insertion and removal of the leading clamping flange on these only compressive or tensile forces, but no lateral forces to the compression or tension direction, in particular no bending forces. The Invention is based essentially on the knowledge that the Printing cylinder cover for a secure hold on the impression cylinder also with its leading clamping flange does not have to be backed up. It is enough a purely non-positive Fixing in a clamping gap.

Prefers the leading end and the trailing end are at least as far the same shape that when attaching and loosening the Druckzylinderbelags either the leading or the trailing end attached first or be solved can. The direction of rotation of the printing cylinder can be used for the purpose of changing the lining be chosen freely. So can the trailing end hung first and the pressure cylinder against the production direction driven by rotation or the leading one End hung first and the printing cylinder rotatably driven in the production direction become. The freedom of choice achieved by the invention makes it possible in particular, that in printing units in so-called H-construction all printing forme cylinders of the printing unit, the printing plates in the same Alignment mounted relative to the respective printing forme cylinder and can be taken off. The shape symmetry of the printing cylinder coverings with respect to the coating ends especially benefits the fully automatic lining change the two ends automatically clamped by means of a change machine and solved become. For example, all can Pressure cylinder coverings be aligned horizontally when the first clamped flange is introduced into the respective clamping channel. When releasing the each last to be solved clamping flange can also all Pressure cylinder coverings be held in a horizontal orientation.

Especially the impression cylinder lining according to the invention is preferred in terms of Its two ends are perfectly symmetrical. The direction of rotation the pressure cylinder plays at preferably exactly symmetrical pad ends not matter. For not exactly symmetrical, but only substantially the same shaped covering ends, these are so largely the same shape, that in this case, the direction of rotation for the practical handling of the Printing cylinder pads does not matter.

Of the leading clamping flange can multiply to increase the rigidity angled, i. in longitudinal section the impression cylinder pad be polygonal shaped. Also a bent everywhere Clamping flange is conceivable and basically also a combination straight and curved flange sections. Such a clamping flange is polygonal or concave to the bottom of the impression cylinder pad everywhere round or mixed polygonal and round shaped. Not least in the In view of ease of manufacture should be a polygonal Clamping flange at most have three bends. Preferably, it is angled only twice. The substantially right angle is between which at the clamping flange subsequent Area of impression cylinder pad, i. between the bottom or bearing surface of the impression cylinder pad, and a tangent to the free end, i. the outside free Edge, the clamping flange measured. If preferred plan each Flange sections becomes the angle between the outermost of the flange sections and the underside of the impression cylinder pad.

In the case of a preferably double-angled clamping flange whose inner flange portion which forms the edge with the adjoining portion of the impression cylinder cover should enclose an angle in the range of 90 ° to 105 ° with the underside of the impression cylinder lining and everywhere an equal length measured on the edge 2 to 5 mm. The outer flange section enclosing the inner flange section should have an equal length of 5 to 10 mm everywhere and be angled away from the inner flange section by 5 to 20 °. The blunter the angle included between the underside of the impression cylinder pad and the inner flange portion, the greater the angle that the outer flange portion is angled from the inner flange portion. In the case of a triple angled clamping flange whose innermost flange portion is preferably also at an angle from the range of 90 ° to 105 ° to the underside of the printing cylinder pad angle and has a length in the range of 2 to 4 mm. The central flange portion should have a length in the range of 2 to 4 mm and angled from the innermost flange portion by 5 to 15 °. The outermost flange section should have a length in the range of 5 to 10 mm and angled from the central flange portion by 5 to 15 mm. The multiple angled clamping flange is preferably clamped only in its outer and outermost flange portion. The flange sections are each plan in both versions.

In a likewise preferred second embodiment is the leading Clamp flange simply flat.

The in the two embodiments what has been said above with respect to the leading clamping flange is preferred symmetrical embodiments in the same way for the respective trailing clamping flange. Although the leading one Clamping flange and the trailing clamping flange preferably both either the first embodiment or the second embodiment Nevertheless, it should not be excluded that the two embodiments be combined with each other by, for example, a planner leading Clamping flange with a polygonal trailing clamping flange or more preferably a polygonal leading clamping flange with a Plan trailing clamping flange is combined.

The Introduce into the channel, pinching in the channel and taking out the channel can be further facilitated when the clamping flanges are short, being the length the clamping flange is measured in each case on the edge at which the protrudes each clamping flange. Advantageously, the clamping flanges at most 15 mm and more preferably at most 10 mm long. In the case of a concavely curved, for example polygonal clamping flange corresponds to this length specification the height the front free flange end measured with the adjacent area the pressure cylinder lining formed edge, wherein the substitution on the Bottom of Druckzylinderbelags can be measured.

Although the leading clamping flange with the adjoining area of the printing cylinder pad preferably exactly at an angle of 90 °, the advantages of the invention but basically even when existing minor Deviations from the 90 ° angle be achieved. As at least substantially perpendicular Accordingly, even angles of 90 ° ± 15 ° viewed. A reduction across from the right angle, d. H. towards more acute angles, but not allowed cause that the impression cylinder pad is no longer with the leading end can first be pulled out of the terminal channel, because too strong and then for the removal of harmful form closure can form. An angle of exactly 90 ° in both the leading and even at the trailing end is also beneficial in terms of one possible narrow channel opening on the peripheral surface the cylinder, in particular in preferred embodiments, in which the leading End and the trailing end or trailing end of a other Druckzylinderbelags in the same terminal channel, each in its own Clamping gap to be clamped. A multi-angled clamping flange is advantageous because of its increased stiffness, which is for insertion into desired the clamping channel becomes.

The Invention relates to the printing cylinder lining as such also a combination from at least one printing cylinder and at least one printing cylinder lining. The at least one impression cylinder lining forms both at a leading end as well as at a trailing end depending a dimensionally stable angled Clamping flange, hereinafter again as leading clamping flange and subsequent clamping flange, wherein the leading Clamping flange bent at least substantially at right angles is. The impression cylinder is at its periphery with a clamping channel or with several clamping channels provided, offset in the circumferential direction of the cylinder to each other are arranged. Preferred versions it corresponds, if in the circumferential direction of the printing cylinder in succession two Druckzylinderbeläge attached can be and the printing cylinder accordingly two in the circumferential direction to each other staggered clamping channels having. In the axial direction are advantageously also several impression cylinder coverings fastened side by side to the printing cylinder, wherein for the coverings per axial section a single clamping channel or more clamping channels provided could be, which are circumferentially offset from each other to over the Scope only a single impression cylinder pad or in a row several impression cylinder coverings to be able to order. So can on a double-width printing cylinder axially next to each other four simple impression cylinder coverings or two impression cylinder coverings be arranged in panoramic format. For triple-width impression cylinders can next to each other, for example, six pages wide Pressure cylinder coverings or three impression cylinder coverings be arranged in panoramic format. The impression cylinder is relative to his Clamping channel or its clamping channels to the invention shaped adapted leading end of Druckzumbelags or more Druckzylinderbeläge. the one clamping surface a clamping gap, against which the clamping flange is clamped, is preferably shaped so that the clamping flange by the clamping force not be deformed and thus by the acting clamping force conditional grasping can not take place. This ensures a slight withdrawal of the clamping flange.

The The invention further relates to a printing cylinder, on the Scope of the above for the combination described Druckzylinderbelag is arranged. The printing cylinder has a clamping channel in which a clamping member is arranged, with a leading counter surface a Clamping gap for forms the leading clamping flange of Druckzylinderbelags. The Clamping member is stretched elastically against the leading mating surface. The leading clamping flange of the printing cylinder pad is in the clamped gap formed in this way. The counter surface becomes referred to as leading, because they with the clamping member the nip for the leading clamping flange forms. Although preferred, one is Clamping member leading arrangement of the leading counter surface not mandatory, d. H. the leading counter surface can the cooperating clamping member should always be arranged trailing.

In the clamping channel is further the trailing end of the printing cylinder pad or, more preferably, a trailing end of another impression cylinder pad clamped. In preferred embodiments is in the clamping channel a further, trailing clamping gap for the trailing clamping flange formed with a further clamping member and a trailing counter surface against the the further clamping member is stretched elastically. Basically however, only one clamping gap may be formed in the clamping channel, in which the leading and the trailing clamping flange on each other be clamped. The leading clamping flange would in such a training the trailing mating surface form, and the same clamping member would both the leading as well as the trailing clamping flange. The above With regard to the leading nip, what is said applies preferably also for the trailing nip.

Of the Pressure cylinder lining of the combination and also the impression cylinder lining, which is already arranged on the printing cylinder, corresponds advantageously the impression cylinder cover previously described as such. If on the printing cylinder more Druckzylinderbeläge are arranged or arranged can be this applies advantageously for each of the multiple impression cylinder linings.

The Clamping member and, if available, the other clamping member is or are advantageously in a direction parallel to the clamping flange in the clamping channel set so that the position of the center of gravity the clamping member and, if another clamping member is present, also the position of its center of gravity, not in one direction change can, both parallel to the clamping flange and radially too the axis of rotation of the printing cylinder has. This prevents that the clamping member the clamping flange in the withdrawal from the Follow clamping channel and thus the adhesion can strengthen. It is particularly preferred if a guide is formed in the clamping channel is that the clamping member at least substantially at right angles to a radial on the axis of rotation of the printing cylinder leads movable, wherein the radials pass through the opening extends the clamping channel. By guiding the clamping member is advantageously at the same time also supported radially outward and in this way as described above, to a gain of the frictional connection by to prevent the extraction of the clamping flange.

The Clamping member is preferably movably mounted in the clamping channel. Advantageously, it is inherently stiff, so that it is among the In operation on the clamping member acting forces including the to exercise it Clamping force not deformed.

Around the clamping channel with the smallest possible opening obtained, forms the clamping member in preferred embodiments a clamping portion in which it forms the nip, and a Guide section, in which it led itself is, preferably in the manner described above. In preferred execution the clamping portion projects finger-like from the guide portion and in the direction on the opening of the clamping channel. By for the function of leadership and for the function of clamping is provided for each separate section, the clamping section can be free of guiding functions in the circumferential direction the printing cylinder be particularly slim. In particular in preferred designs, in which the counter surface the clamping portion to the outer peripheral surface of the Pressure cylinder is parallel to a extending through the channel opening Radial, in this way can narrow the channel opening itself in the circumferential direction being held.

If for the Clamping a trailing clamping flange as preferred another Clamping member is provided, the above statements apply preferably also for the further clamping member.

A clamping force generating clamping device is preferably supported on the one hand on the clamping member and on the other hand on the other clamping member, so that the one of the clamping members each receives the clamping force for the other. If the clamping members each have said clamping portion and guide portion, it is further preferred if the tensioning means acts between the guide portions and more preferably, when the tensioning means between the guide sections arranged and stretched. The clamping members advantageously guide one another with their guide sections, ie the guide sections form a compact unit which is accommodated in a geometrically simple receiving space which forms the guide for both clamping members. In particular, a filler, which also forms one of the two boundary edges of the channel opening at the same time, the leadership of at least one clamping member, preferably the clamping member and the further clamping member form.

The Clamping gaps are rotationally invariant in preferred embodiments shaped.

advantageous Features are also set out in the subclaims and their combinations described, which are also dependent for each claim to feature combinations can act, which already have individually advantageous features.

embodiments The invention will be explained below with reference to figures. At the embodiments Obviously emerging features form each individually and in each combination of features the objects the claims and also the embodiments described above advantageous further. Show it:

1 a printing cylinder lining according to the invention in a first embodiment,

2 a clamping channel of a printing cylinder with a clamping device of a first embodiment and the clamped pressure cylinder lining,

3 the clamping channel with the clamped pressure cylinder lining and a suction and rolling device in the introduction of the impression cylinder lining in the clamping channel,

4 the clamping channel with clamped pressure cylinder lining and the suction and rolling device in the application of the printing cylinder pad from the clamping channel,

5 the impression cylinder in a view of the clamping channel,

6 the application of several printing cylinder coverings on printing cylinders of a printing unit,

7 a printing cylinder lining according to the invention in a second embodiment,

8th a modified impression cylinder lining of the first embodiment and

9 another modified pressure cylinder lining of the first embodiment.

1 shows a printing cylinder pad 8th a first embodiment in a longitudinal section. In the impression cylinder pad 8th It is an elastically bendable printing form for offset printing. Such Druckzylinderbeläge are generally formed as thin metal plates, which are each provided with an angled clamping flange before mounting on a printing cylinder, in the embodiment of a printing forme cylinder, in the imaged or still to be imaged area plan and at opposite ends. In that regard, the printing cylinder lining corresponds 8th the usual printing forms. He has based on the direction of rotation of the printing cylinder at a leading end a leading clamping flange 8a and at a trailing end a trailing clamping flange 8b on. The clamping flanges 8a and 8b are dimensionally stable, so that the impression cylinder coating 8th with both clamping flanges 8a and 8b can be pressed into a nip, in a clamping channel of the printing cylinder for a clamping attachment of the printing cylinder pad 8th is formed. In this sense, the clamping flanges 8a and 8b from the adjacent area of the printing cylinder pad 8th dimensionally stable angled. Dimensionally stable means that the impression cylinder surface 8th while maintaining its angled clamping flanges 8a and 8b is manageable, especially when mounting on the printing cylinder and when removing. For practical reasons, the leading end and the trailing end of the Druckzylinderbelags 8th with the respective clamping flange 8a or 8b to be considered stiff in itself.

The two clamping flanges 8a and 8b are each angled at the same angle α, ie they close with the adjoining area of the impression cylinder pad 8th each angle α. The angle α is 90 °. The impression cylinder surface 8th is symmetrical not only with respect to the included angle α, but also with respect to the length A of the clamping flanges 8a and 8b ie the clamping flanges 8a and 8b have the same length A, in each case measured on the flange edge, ie on the adjoining area of the printing cylinder pad 8th in the planned state. The length A should be at most 15 mm and at least 7 mm, in the embodiment it is 9 mm.

2 shows a printing cylinder 1 fragmentary in a cross section. On an outer circumference of the impression cylinder 1 an axially extending clamping channel is formed, in which for a leading clamping flange 8a and a trailing clamping flange 8b ever a separate nip is formed. If the printing cylinder 1 just simple Extent has, include the clamping flanges 8a and 8b to the same pressure cylinder surface 8th , For a printing cylinder 1 double or even greater scope is the clamping flanges 8a and 8b different impression cylinder coverings 8th , The clamping flanges 8a and 8b be in the respective nip with a in all operating conditions of the printing cylinder 1 always the same, given clamping force.

In the clamping channel, a clamping device is arranged, which is a clamping member 11 , another clamping member 15 and one between the clamping members 11 and 15 arranged clamping device 19 includes. In the exemplary embodiment, the clamping device consists only of the clamping members 11 and 15 and the clamping device 19 , The clamping device 19 is formed as a helical spring and acts as a compression spring. The illustrated compression spring may be the tensioning device 19 already alone or in combination with only one further compression spring or with several other compression springs form. The compression spring or compression springs of the tensioning device 19 is or are individually in one or more holes of the clamping member 11 taken and on the one hand at the bottom of its bore and on the other hand opposite the other clamping member 15 supported and prestressed. Alternatively, the further clamping member could 15 be provided with the bore or the plurality of holes. The clamping members 11 and 15 Already store the clamping device alone 19 , so that the clamping device completely pre-fitted according to the installed state can be inserted into a receiving space of the clamping channel.

The clamping members 11 and 15 are each perpendicular to a radial R on the axis of rotation of the printing cylinder 1 can be moved back and forth and are guided linearly in the clamping channel during this movement. The axis of mobility is denoted by T. The radial R extends through the opening of the clamping channel and forms for the opening and an immediately adjacent portion extending radially inwardly to at least the ends of the clamping flanges 8a and 8b extends, an axis of symmetry, ie, the clamping channel is axisymmetric in this outer region to the radial R. In the axisymmetric region, a leading channel wall forms a counter surface 3 for the clamping member 11 and a trailing channel wall a mating surface 4 for the further clamping member 15 , The clamping member 11 forms with the counter surface 3 a clamping gap for the leading clamping flange 8a , and the other clamping member 15 forms with the counter surface 4 a clamping gap for the trailing clamping flange 8b , The clamping device 19 pushes the clamping member 11 against the clamping flange 8a and the further clamping member 15 against the clamping flange 8b , Is no clamping flange in the respective clamping gap 8a or 8b clamped, presses the clamping device 19 the clamping members 11 and 15 against the respective mating surface 3 or 4 , The clamping flanges 8a and 8b lie on the respective mating surface 3 or 4 flat on. The counter surfaces 3 and 4 point parallel to the radial R They therefore each close with an immediately at the opening edge to the outer periphery of the printing cylinder 1 applied tangent at an angle slightly smaller than 90 °. The clamping flanges 8a and 8b Therefore, they are preferably angled accordingly, ie they close even in the unloaded state of Druckzylinderbelags 8th or the impression cylinder coverings 8th with the respective plan area of the printing cylinder cover concerned 8th each a congruent slightly smaller angle than 90 °. However, the deviation from the exact right angle is so small that it plays no role in practical matters. With the same orientation of the counter surfaces 3 and 4 could the clamping flanges 8a and 8b therefore be angled exactly below 90 °. Likewise, the mating surfaces could 3 and 4 exactly radial to the axis of rotation of the printing cylinder 1 point. Due to the axis symmetry of the clamping channel in the radially outer region, ie in the clamping region, the drawn direction of rotation of the printing cylinder 1 be reversed if necessary, so that the clamping flange 8b then the leading and the clamping flange 8a forms the trailing clamping flange.

The clamping members 11 and 15 are each designed as in itself rigid, integral in the embodiment components. The clamping member 11 is composed of a guide section 12 and one of the guide section 12 right-angled, in the installed state radially outwardly projecting clamping section 13 together. The clamping section 13 is in the circumferential direction, ie in the direction of rotation of the printing cylinder 1 slender shaped finger-like, in the embodiment as a plate-shaped, even axially narrow strip, the extent in the axial direction but is significantly larger than in the circumferential direction. The further clamping member 15 is made up of a leadership section 16 and a clamping portion 17 together, for the above to the clamping member 11 Said also applies. Radially inward of the clamping area 3 . 4 widens the clamping channel to a receiving space and a guide for the guide sections 12 and 16 to build. The guide is, as already stated, a linear guide along the axis of movement T. Against movements in the axial direction of the printing cylinder 1 are the clamping members 11 and 15 also secured. The guide is a radially outer guide 5 and a radially inner guide 6 , which are each formed as a plane guide surfaces. The outer leadership 5 furthermore, assumes the function of a support surface on which the clamping member directly engages 11 and over the clamping member 11 also the other clamping member 15 in one direction parallel to the clamped clamping flanges 8a and 8b are supported. This will ensures that in the two clamping gaps only the clamping force of the clamping device 19 can work. The means of the clamping device 19 applied clamping force is thus also in operation, ie upon rotation of the printing cylinder 1 not supported by the centrifugal force. By a movement of the clamping members 11 and 15 parallel to the clamped clamping flanges 8a and 8b is prevented radially outward, the risk is counteracted that when pulling out the clamping flanges 8a and 8b from the respective nip by a nachrücken the clamping members 11 and 15 amplify the respective clamping force and pulling out the clamping flanges 8a and 8b for releasing the printing cylinder pad 8th or the impression cylinder coverings 8th can complicate.

The limiting walls of the clamping channel, in particular the counter surfaces 3 and 4 and the guides 5 and 6 , are directly from a cylinder body of the printing cylinder 1 and a filler used on the outer periphery 7 educated. The filler 7 fits snugly in an axial groove on the outer circumference of the cylinder body. The filler 7 forms in particular the receiving space and the guide for the clamping members 11 and 15 , Furthermore, the filler forms 7 the leading counter surface 3 , The trailing mating surface 4 immediately forms the cylinder body.

3 shows the introduction of the leading clamping flange 8a in the nip. To introduce a suction and rolling device with rollers 9 and pneumatic suction cups 10 used from a parked position substantially in a direction radial to the axis of rotation of the printing cylinder 1 against the impression cylinder 1 deliverable and from the impression cylinder 1 is shut off. The suction and rolling device is directly above the printing cylinder 1 stationary or in a substantially tangential direction to the impression cylinder 1 arranged to move back and forth. The intake and Abstellhub is advantageously very short, for example, only a few inches long. Preferably, it is only a few millimeters longer than the clamping flanges 8a and 8b , so that the lifting movement is just enough to one of the clamping flanges 8a and 8b from its nip and the respective end of the printing cylinder pad 8th to pull out of the clamping channel. 3 shows the last step in the introduction of the leading clamping flange 8a , The trailing end was previously already in the clamping channel or at another clamping channel of the printing cylinder 1 clamped attached. Then have the roles 9 the printing surface 8th rolled over in the direction of its leading end and the impression cylinder pad 8th thereby applied to the cylinder surface. By rolling over almost to the height of the leading clamping flange 8a this is in between the clamping member 11 and the counter surface 3 pressed nip pressed until the in 3 shown state is obtained. If from the impression cylinder pad 8th first the leading end 8a is to be attached, the leading end of the suction cups 10 hanging over the nip moves and then using the suction cups 10 pressed into the nip. If necessary, with the roles 9 subsequently forced.

4 shows the pulling out of the leading clamping flange 8a by means of the suction cups 10 , For pulling out the suction cups 10 as close as possible to the edge of the leading end in suction connection with the pressure pad 8th brought and the clamping flange 8a then simply pulled out of the nip. Further interventions are not required for the extraction, since it is ensured that in the nip only the specified by the design clamping force of the clamping device 19 acts. In particular, the clamping device does not have to be actuated.

A preferred suction and rolling device is known from PCT / EP2005 / 004937 (55 114 XI), the disclosure of which is referred to. PCT / EP2005 / 004937 relates to a so-called semi-automatic, which is described in this application only in combination with a conventional pressure cylinder lining and accordingly only in a position to a trailing clamping flange corresponding to the clamping flange 8b automatically to pull out of the nip, while there conventionally formed leading clamping flange mounted by hand and pulled out of the nip. By using a Druckzylinderbelags invention 8th In contrast, the suction and rolling device both for an automatic introduction and an automatic withdrawal of the leading clamping flange 8a and the trailing clamping flange 8b be used.

5 shows the impression cylinder 1 in a plan view of the clamping channel. The printing cylinder 1 is, as usual, divided into several, axially juxtaposed pressure zones. Accordingly, the impression cylinder 1 with axially adjacent several printing plates 8th verifiable. In 5 are four single-sided printing forms 8th axially next to each other on the impression cylinder 1 arranged. Distributed over the circumference, in turn, several Druckzylinderbeläge 8th be arranged one behind the other. The clamping channel extends axially from the one end side of the printing cylinder 1 to the other through. In the clamping channel is per clamped impression cylinder lining 8th a register means for adjusting the side register of the printing cylinder cover concerned 8th arranged. On both sides of the register devices is ever a clamping device 11 . 15 arranged. Each clamping flange 8a and 8b is thus by means of two pairs of clamping members 11 or 15 clamped.

6 shows a printing unit arrangement with two printing columns for a continuous web. The arrangement comprises two printing unit bridges, with four printing cylinders 1 and 2 per bridge. The upper bridge is in the shape of a flat V. The lower bridge corresponds to a flat V that is upside down. Overall, a so-called H-bridge is formed in this way. The impression cylinder 1 be with Druckzylinderbelägen invention 8th occupied and correspond to the pressure cylinder described above 1 , The impression cylinder 2 are transfer cylinders and can be in particular blanket cylinder. They are each covered with at least one transfer cloth, which may be fastened in particular on a lining carrier having a leading end and a trailing end according to the invention. The printing cylinders 1 is ever a suction and rolling device 9 . 10 assigned.

6 shows how the impression cylinder pads 8th for all printing cylinders 1 the H-bridge the respective clamping channel in the same orientation, in the embodiment, each horizontally, fed and can be inserted in this orientation in the respective nip. This facilitates in particular a fully automatic change of Druckzylinderbeläge 8th , The automatic change machines lead to each of the printing cylinders 1 the same feeding movement and when removing the same discharge movement. If any of the pressure cylinders 1 each associated with its own change machine, all change machines can be formed equal in terms of their movement options. If on both sides of the web ever for the pair of impression cylinders 1 a common change machine is provided, this can due to the symmetry of Druckzylinderbeläge 8th be particularly simple, since he for the two to be operated by him printing cylinder 1 for feeding and removing the printing cylinder coverings 8th Movements in the same direction only needs to perform. A preferred change machine, optionally one of several printing cylinders 1 with pressure cylinder coverings 8th is disclosed in German Patent Application No. 10 2004 052 021, which is incorporated herein by reference.

In 6 are magazines after all 20 shown, one magazine each 20 per impression cylinder 1 , The magazines 20 each take the printing cylinder coverings 8th the associated printing cylinder 1 on. In order to keep the supply and Abführwege short and easy to make or the change machines, the magazines are 20 aligned so that the change machine the new impression cylinder surface 8th in the feed direction from the associated magazine 20 and the removed impression cylinder pad 8th in the discharge direction in the associated magazine 20 can move. The change machine thus comes with two movements, a movement in feed and discharge direction, which preferably points perpendicular to the web, and the feeding and Abstellbewegung.

7 shows a printing cylinder pad 8th a second embodiment in a longitudinal section. The impression cylinder surface 8th has at its leading end and its trailing end depending on a polygonal clamping flange 8a and 8b on. Also in the second embodiment is the impression cylinder pad 8th symmetrical with respect to a in the axial direction of the printing cylinder extended central transverse axis of the printing cylinder pad 8th , The clamping flanges 8a and 8b are each angled twice. An edge with the adjoining area of the printing cylinder pad 8th forming inner flange portion has a length A and an adjoining, outer flange portion has a length B, measured on the next inner edge. The length A is 3 mm. The length B is 6 mm. The inner flange section closes with the underside of the impression cylinder lining 8th an angle α of 95 °. The outer flange portion is from the inner flange portion toward the underside of the Druckzylinderbelags 8th Angled at an angle β of 15 °. The outer flange section closes with the underside of the impression cylinder lining 8th , Where the impression cylinder lining is seen in the plan state, thus the angle α-β of 80 °. The included between the two flange sections angle of 165 ° on the one hand is still so dull that the clamping flange 8a and 8b how can a simple flat clamping flange in the clamping channel and the respectively provided clamping gap can be introduced, on the other hand, by the bending of the respective clamping flange 8a and 8b increases their rigidity and thereby facilitates insertion into the nip.

The 8th and 9 each show a pressure cylinder surface 8th the first embodiment, ie, each with a simple planar clamping flange 8a and 8b , In contrast to the impression cylinder pad 8th of the 1 are the clamping flanges 8a and 8b in the modified embodiment of the 8th each at an angle α of less than 90 ° and in the modification of 9 each angled at an angle α of more than 90 °. In the more acute-angled modification of 8th the angle α is 80 ° and in the more obtuse modification of 9 each 95 °. In both modifications, angles α are conceivable which deviate from the right angle by up to 15 °. The impression cylinder coverings are preferred 8th also the two modifications with respect to their pad ends exactly symmetrical.

1

Pressure cylinder, form cylinder

2

Printing cylinder, transfer cylinder

3

Counter surface, channel wall

4

Counter surface, channel wall

5

Guide, support surface

6

guide

7

filling

8th

Pressure cylinder lining

8a

leading forming clamping flange

8b

trailing clamping flange

9

role

10

suction cup

11

clamping member

12

guide section

13

clamping section

14

15

clamping member

16

guide section

17

clamping section

18

19

tensioning device

α

angle

α

angle

A

length

B

length

Claims (26)

Pressure cylinder lining, the one dimensionally stable angled leading clamping flange ( 8a ) and a dimensionally stable angled trailing clamping flange ( 8b ), wherein the clamping flanges ( 8a . 8b ) are formed in the same way and each with a subsequent area of the Druckzylinderbelags ( 8th ) include an at least substantially right angle (α; α-β), wherein the angle (α; α-β) between the respective adjoining region of the impression cylinder lining ( 8th ) and a tangent to the free end of the respective clamping flange ( 8a . 8b ) is measured. Printing cylinder lining according to claim 1, characterized that the angle (α; α-β) is at least 75 ° and at most 105 °. Printing cylinder lining according to one of the preceding claims, characterized in that the clamping flanges ( 8a . 8b ) round or preferably polygonal with respect to the respective adjoining area of the printing cylinder pad ( 8th ) and concave everywhere. Printing cylinder lining according to one of the preceding claims, characterized in that the clamping flanges ( 8a . 8b ) repeatedly, preferably twice, and in each case in the direction of a lower side of the printing cylinder cover ( 8th ) are angled. Printing cylinder lining according to the preceding claim, characterized in that the clamping flanges ( 8a . 8b ) each have an inner flange portion, which is connected to the respective adjoining region of the Druckzylinderbelags ( 8th ) forms an edge and encloses an angle of at least 80 ° and at most 110 °. Printing cylinder lining according to the preceding claim, characterized in that the clamping flanges ( 8a . 8b ) each have a second flange portion, which is angled at least 5 ° and at most 20 ° from the respective inner flange portion. Pressure cylinder lining, which at a leading end of a plan, dimensionally stable and at least substantially at right angles angled leading clamping flange ( 8a ) and at a trailing end of a plan, dimensionally stable and at least substantially at right angles or obtuse angled trailing clamping flange ( 8b ) having. Printing cylinder lining according to the preceding claim, characterized in that the leading clamping flange ( 8a ) and the trailing clamping flange ( 8b ) are the same shape. Printing cylinder lining according to one of the preceding claims, characterized in that the leading clamping flange ( 8a ) and the trailing clamping flange ( 8b ) measured on an edge around which the respective clamping flange ( 8a . 8b ) is angled, each having a length (A, A, B) of at most 15 mm. Combination of impression cylinder ( 2 ) and impression cylinder lining ( 8th ), which at a leading end and a trailing end depending on a plan, dimensionally stable angled clamping flange ( 8a . 8b ) forms for a terminal in only one or a respective clamping channel ( 3 - 6 ) of the printing cylinder ( 2 ), whereby the leading clamping flange ( 8a ) is angled at least substantially at right angles. A printing cylinder, comprising: a) a clamping channel ( 3 - 6 ), b) in the clamping channel ( 3 - 6 ) a clamping member ( 11 ) and a leading counter surface ( 3 ), against which the clamping member ( 11 ) is stretched elastically, c) and a pressure cylinder lining ( 8th ) with a dimensionally stable and at least substantially at right angles angled leading clamping flange ( 8a . 8b ), which between the clamping member ( 11 ) and the leading counter surface ( 3 ) is clamped. Printing cylinder according to the preceding claim, characterized in that the center of gravity of the clamping member ( 11 ) not parallel to the clamping flange ( 8a ) is movable. Printing cylinder according to one of the preceding claims, comprising a guide ( 5 . 6 ), which the clamping member ( 11 ) at least substantially perpendicular to a radial (R) leads, which extends from the axis of rotation of the printing cylinder through an opening of the clamping channel. Printing cylinder according to one of the preceding claims, comprising a guide ( 5 . 6 ), which the clamping member ( 11 ) linearly. Printing cylinder according to one of the preceding claims, characterized in that the clamping member ( 11 ) and the leading counter surface ( 3 ) the clamping flange ( 8a . 8b ) clamp free of bending forces. Printing cylinder according to one of the preceding claims, characterized in that the leading counter surface ( 3 ) from a plane side wall of the clamping channel ( 3 - 6 ) is formed which at least substantially parallel to a radial (R) on the axis of rotation of the impression cylinder ( 2 ). Printing cylinder according to one of the preceding claims, characterized in that the leading clamping flange ( 8a ) at least in the region, the clamping contact with the clamping member ( 11 ) has, is plan. Printing cylinder according to one of the preceding claims, characterized in that the clamping member ( 11 ) a guide section ( 12 ) and one of the guide section ( 12 ) in the direction of an opening of the clamping channel ( 3 - 6 ) in cross-section finger-like upstanding clamping portion ( 13 ) and in that in the clamping channel ( 3 - 6 ) a guided tour ( 6 . 8th ) is formed, which the guide section ( 12 ) in a transverse direction to the clamping flange ( 8a ), so that the clamping section ( 13 ) on the leading counter surface ( 3 ) to and from the leading counterface ( 3 ) is movable away. Printing cylinder according to one of the preceding claims, comprising a tensioning device ( 19 ), which on the clamping member ( 11 ) exerts an elasticity force, which the clamping member ( 11 ) against the clamping flange ( 8a ) presses. Printing cylinder according to one of the preceding claims, comprising a further clamping member ( 15 ), which in the clamping channel ( 3 - 6 ) elastically against a trailing mating surface ( 4 ), wherein between the further clamping member ( 11 ) and the trailing mating surface ( 4 ) a trailing clamping flange ( 8b ) of the same or another printing surface ( 8th ) is clamped. Printing cylinder according to one of the preceding claims, characterized in that the trailing clamping flange ( 8b ) at least in the region that in the same or another clamping channel ( 3 - 6 ) Clamping contact with a clamping member ( 15 ) has, is plan. Printing cylinder according to a combination of the two preceding claims, characterized in that the tensioning device ( 19 ) in a direction on the clamping member ( 11 ) and in the opposite direction to the further clamping member ( 15 ) is supported. Printing cylinder according to one of the two preceding claims in combination with claim 12, characterized in that the clamping device ( 19 ) between the clamping members ( 11 . 15 ) is arranged. Printing cylinder according to one of the three preceding claims, characterized in that the clamping members ( 11 . 15 ) lead each other linearly. Printing cylinder according to one of the four preceding claims, characterized in that the clamping members ( 11 . 15 ) at least one, the associated clamping flange ( 8a . 8b ) contacting clamping section ( 13 . 17 ) and that the at least one clamping section ( 13 ) of the clamping member ( 11 ) and the at least one clamping section ( 17 ) of the further clamping member ( 15 ) in the axial direction of the printing cylinder ( 2 ) are arranged side by side and overlap each other at least partially in the circumferential direction. Printing cylinder according to one of the preceding claims, characterized in that the Drückzylinderbelag ( 8th ) an impression cylinder lining ( 8th ) according to one of claims 1 to 9.