EP1310363A1 - Printing unit of a printing machine - Google Patents

Abstract

The cylinder (2,3) has at least two ducts (12,13,14) one behind each other in a peripheral direction and taking second casings (9,11) on the cylinder. At least one of the ducts is at least partly covered by a second casing. The cylinder is a form or transfer cylinder with the second casing in the form of a printing plate,

Description

The invention relates to a printing unit of a rotary printing press according to the Preamble of claim 1.

From DE 44 29 210 A1 is the arrangement of four in the direction of rotation of a forme cylinder successively arranged printing foils known, which are held in four pits. The printing films each span between two pits Arc section.

DE 44 29 891 A1 shows a printing unit of a rotary printing press with double large transfer cylinder (i.e., two section lengths around the circumference) connected with a simply large forme cylinder works together.

DE 198 03 809 A1 also provides an arrangement of cylinders Offset printing unit known in which the scope of the transfer cylinder to the of the forme cylinder is in a double ratio. The forme cylinder is in Circumferential direction with a printing form and in its longitudinal direction with at least four standing printed pages in broadsheet format, or a corresponding number of standing or lying tabloid or book formats, verifiable. In the circumferential direction of the Transfer cylinder is for receiving two in the longitudinal direction of the cylinder printing blankets arranged side by side a single one, either lengthways continuous slot or one slot divided lengthways and offset by 180 ° arranged. The printing blanket, for example, has two layers as one on a carrier plate attached rubber blanket executed.

DE 34 41 175 C2 are for the purpose of relaxing the rubber blanket Recesses in the cylinder surface of the transfer cylinder proposed. For this purpose, a pad can be placed between the cylinder and the rubber blanket be arranged, not over the entire length of the blanket in the circumferential direction points and has an interruption. To hold the interrupted pad in addition to the tensioning channel for the rubber blanket, an insertion slot on the circumference of the Cylinder provided. The arranged in the longitudinal direction of the transfer cylinder Recesses and the channel receiving the rubber blanket are arranged so that they are together with the channel of the plate cylinder in the contact area Act.

DE 197 40 575 A1 shows interacting form and transfer cylinders, whereby in one embodiment, the transfer cylinder in the circumferential direction one behind the other two tension channels and two rubber blankets held in the tension channels exhibit. Another example uses a double-sized transfer cylinder a double large forme cylinder, but both cylinders in Have only one clamping channel in the circumferential direction. The channels roll in all examples do not depend on each other.

From DE-OS 19 60 635 a single forme cylinder is disclosed, which on his Has circumference in the circumferential direction several channels for fastening printing forms. When the forme cylinder is occupied with a printing form in the circumferential direction, at least one of the channels should be covered.

The invention has for its object a printing unit of a rotary printing press to accomplish.

The object is achieved by the features of claim 1.

The advantages that can be achieved with the invention are, in particular, that a flexible one Use of different elevator formats is possible and at the same time when in use pressure relief in the area of ducts of lifts with large unwinding lengths, especially in the area of channels covered by elevators, as well as one over the Scope of consistently high print quality when processing the print image is guaranteed.

The arrangement of several in the longitudinal direction of the shape and / or Transmission cylinder running channels will meet a wide variety of requirements as required, without changing the cylinder with changing requirements on existing ones To have to replace printing machines or in the production of every requirement profile to be considered individually.

It is particularly advantageous that both different formats of the lifts, in Circumferential and longitudinal direction of the cylinders, as well as different constellations and Phase shifts of the mutually interacting cylinders can be taken into account, and thus with regard to the partially competing requirements Register accuracy, low vibration, arrangement of the rolling pressure areas and minimization of the non-printable paper can be optimized if necessary.

An advantageous embodiment of a forme cylinder with double circumference, i. H. for example two newspaper pages in the circumferential direction, optionally allows the occupancy with in Circumferential printing form arranged one behind the other or with around the full Large-scale printing forms, whereby a channel is covered. The arrangement of reduced over the full extent printing forms z. B. significantly the Changeover time. An arrangement also diminishes in the case of a transfer cylinder the changeover time of printing blankets reaching over the full extent.

By arranging at least two approximately continuous in the longitudinal direction Channels on a transfer cylinder are used in a variety of ways Arrangement of elevators, such as printing blankets created. Advantageous in terms of on the quality of the processing of the printed image compared to double-sized cylinders with only one channel is also in the arrangement of several channels that in the case of Printing blankets that extend around the entire circumference, a covered channel can also serve to relax the elevator.

The arrangement of a single, extending in the longitudinal and circumferential direction Elevator brings advantages in terms of diversity in printable formats (height and Width of the print area such as B. Panorama).

If a channel is covered by a printing form, it is due to existing Risk of breakage advantageous to arrange the forme cylinder and transfer cylinder so that the covered channel rolls on a channel of the transfer cylinder. Unrolling too a channel of the transfer cylinder covered by a printing blanket on a Channel of the forme cylinder is in terms of a further improved relaxation of the Printing blanket at the passage of the channels on each other, and thus for the unrolled Print image advantageous.

The arrangement of several arranged side by side in the longitudinal direction of the cylinder, each extends almost over the entire scope of elevators z. B. Advantages in terms of handling and individual interchangeability. This in particular for long cylinders, like this for double-wide (e.g. four newspaper pages in the longitudinal direction of the cylinder) or even three (e.g. six newspaper pages) wide cylinders.

This is also advantageous with regard to the quality of the processing of the printed image Training of the elevators for the transfer cylinder as a multi-layer or multilayer printing blanket, which has a carrier plate and one connected to it Has overlay or layer. In particular with large dimensions is for over the Circumference of the cylinder consistently good and accurate print quality one possible Dimensionally stable training essential.

The formation of the channels with a narrow opening is also advantageous Lateral surface of the cylinder, e.g. B. to reduce paper consumption. For channels of the forme cylinder, a narrow opening is particularly advantageous, especially for Channels that are at least partially covered. For example, this can the risk of breakage is further reduced.

It is also advantageous the circumferential ratio of the transfer cylinder to the forme cylinder to execute integer and the channels on the cylinder in the circumferential direction arrange symmetrically.

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

Fig. 1

ein doppelt breites Zylinderpaar, wobei der Formzylinder mit zwei in Längsrichtung verlaufenden Kanälen ausgebildet ist und sich die Aufzüge auf dem Formzylinder nahezu über den vollen Umfang erstrecken;

Fig. 2

ein doppelt breites Zylinderpaar, wobei der Form- und Übertragungszylinder mit jeweils zwei in Längsrichtung verlaufenden Kanälen ausgebildet ist und sich die Aufzüge auf dem Form- und Übertragungszylinder nahezu über den vollen Umfang erstrecken;

Fig. 3

zwei doppelt breite Zylinderpaare, wobei der Übertragungszylinder mit zwei in Längsrichtung verlaufenden Kanälen ausgebildet und mit zwei sich nahezu über den vollen Umfang erstreckenden, in Längsrichtung nebeneinander liegenden Aufzügen belegt ist;

Fig. 4

zwei doppelt breite Zylinderpaare, wobei der Übertragungszylinder mit zwei in Längsrichtung verlaufenden Kanälen ausgebildet und mit zwei sich nahezu über den vollen Umfang erstreckenden, in Längsrichtung nebeneinander liegenden Aufzügen, jedoch in Umfangsrichtung um 180° versetzt belegt ist;

Fig. 5

zwei doppelt breite Zylinderpaare, wobei der Übertragungszylinder mit zwei in Längsrichtung verlaufenden Kanälen ausgebildet und mit zwei sich nahezu über die gesamte Länge des Ballens erstreckenden, in Umfangsrichtung hintereinander angeordneten Aufzügen belegt ist;

Fig. 6

zwei doppelt breite Zylinderpaare, wobei der Übertragungszylinder mit zwei in Längsrichtung verlaufenden Kanälen ausgebildet und mit vier Aufzügen, wobei jeweils zwei in Umfangsrichtung hintereinander angeordneten Aufzüge in Längsrichtung nebeneinander angeordnet sind;

Fig. 7

zwei doppelt breite Zylinderpaare, wobei der Übertragungszylinder mit jeweils vier in Längsrichtung verlaufenden Kanälen ausgebildet ist und mit zwei sich nahezu über die gesamte Länge des Ballens erstreckenden, in Umfangsrichtung hintereinander angeordneten Aufzügen belegt ist;

Fig. 8

ein mehrschichtiges Drucktuch mit Kanal und Halteeinrichtung.

Show it:

Fig. 1

a double-wide pair of cylinders, the forme cylinder being formed with two channels running in the longitudinal direction and the lifts on the forme cylinder extending almost over the entire circumference;

Fig. 2

a double-wide pair of cylinders, the forme and transfer cylinder is formed with two longitudinal channels and the elevators on the forme and transfer cylinder extend almost over the entire circumference;

Fig. 3

two double-wide pairs of cylinders, the transfer cylinder being formed with two channels running in the longitudinal direction and with two elevators lying almost along the full circumference and lying next to one another in the longitudinal direction;

Fig. 4

two double-wide pairs of cylinders, the transfer cylinder being formed with two channels running in the longitudinal direction and with two elevators lying almost along the full circumference and lying next to one another in the longitudinal direction, but offset in the circumferential direction by 180 °;

Fig. 5

two double-wide pairs of cylinders, the transfer cylinder being formed with two channels running in the longitudinal direction and having two elevators arranged one behind the other in the circumferential direction and extending almost over the entire length of the bale;

Fig. 6

two double-wide pairs of cylinders, the transfer cylinder being formed with two channels running in the longitudinal direction and with four elevators, two elevators arranged one behind the other in the circumferential direction being arranged next to one another in the longitudinal direction;

Fig. 7

two pairs of double cylinders, the transfer cylinder being designed with four channels running in the longitudinal direction and with two elevators arranged one behind the other in the circumferential direction and extending almost over the entire length of the bale;

Fig. 8

a multi-layer printing blanket with channel and holding device.

A printing unit of a rotary printing press has at least one pair of cylinders 01 consisting of two cylinders 02; 03, for example a transfer cylinder 02 and one with this cooperating forme cylinder 03. The transfer cylinder 02 can be printed on the substrate 04 to be printed with a not shown Impression cylinder or with a transfer cylinder 07 of a second Cylinder pair 06 act together, which in turn is associated with a forme cylinder 08. The transfer cylinder 02; 07 are each with at least one elevator 09, for example, a printing blanket 09, and the forme cylinders 03; 08 each with at least an elevator 11, for example a printing form 11, can be occupied.

Depending on the requirements for the print formats and the printing performance, as well as the possibilities the cylinder pairs 01; 06 different widths. For example, the cylinder pairs 01; 06 for newspaper printing single, double or executed three times wide, where the width of the bale, for example of the forme cylinder 03, for two standing or lying newspaper pages. in the Commercial printing is under double the required width for four lying or six Inscribed standing A4 pages. The sizes of the transmission 02; 07 and the Forme cylinder 03; 08 are single or double, based on different standing or lying formats, for example on a standing one or lying newspaper format. Advantageous constellations in newspaper printing are for example a double size, i. H. two sides in the circumferential direction, at Transfer cylinder 02; 07 interacting with a double or single Scope of the forme cylinder 03; 08, each double wide.

Fig. 1 shows a double-wide pair of cylinders 01, transfer cylinders 02 and Forme cylinders 03 each have a double circumference. The forme cylinder 03 has two extending in the longitudinal direction and spaced apart in the circumferential direction Channels 12; 13 for receiving the ends of at least one printing form 11, the Transfer cylinder 02 a channel 14 for receiving the ends of at least one Printing blanket 09 on. The channels 12; 13 of the forme cylinder 03, 08 are at least on a partial section in the longitudinal direction of the forme cylinder 03; 08, in a perpendicular to the Rotation axis lying cross-section considered, one behind the other in the circumferential direction arranged. The form cylinder 03 is in the example with four in the longitudinal direction of the cylinder juxtaposed printing forms 11, for example printing plates 11 occupied, the are each held with their two ends in the channel 12, except for the area of Channel 12 each extend around the entire circumference and each channel 13 cover. To prevent breakage, forme cylinders 03 and Transfer cylinder 02 advantageously arranged so that the covered channel 13 when rolling the cylinder with the channel 14 of the Transfer cylinder 02 acts together. The latter is not necessary if e.g. B. the Channel 13 can be closed by means of a removable cover or the channel width is so small that a break is avoided. The forme cylinder 03 can be single, double and be made three times wide. It can be flexible in a variety of ways, e.g. B. with a continuous, or two or more arranged side by side in the longitudinal direction Printing plates 11 of various formats (e.g. simple, panorama) can be occupied. in the If necessary, the forme cylinder 03 can also have more than two running in the longitudinal direction and circumferentially spaced channels 12; 13 have. The Transfer cylinder 02 in FIG. 1 can have a continuous channel 14 in which two printing blankets 09 are held next to each other in the axial direction. However, it can also two in the axial direction next to each other, but offset from each other, z. B. by 180 °, Channels 14; 16 may be arranged, the printing blankets arranged side by side are also arranged offset from one another (not explicitly shown, second channel 16 would be hidden in Fig. 1 and not visible).

The transfer cylinder 02, as shown by way of example in FIG. 2, can also have a second, z. B. diametrically opposite and in the longitudinal direction of the transfer cylinder 02nd have extending channel 16. The channels 14; 16 of the transfer cylinder 02, 07 are at least on a portion in the longitudinal direction of the transfer cylinder 03; 08, viewed in a cross section perpendicular to the axis of rotation, in Arranged circumferentially one behind the other. In the example, a single one covers itself up to on the area of the channel 14 over the entire length of the bale and almost over the entire printing blanket 09 extending the transfer cylinder 02. Der Forme cylinder is an example with two in the longitudinal direction of the cylinder side by side lying, and each extending almost the entire circumference of the printing plates 11th busy. In the example, the covered channel 13 acts when the cylinder pair 01 rolls off together with the also covered channel 16 of the transfer cylinder 02. He can, however, as in the first exemplary embodiment, on the uncovered channel 14 roll.

In addition to that with the forme cylinder 03; 08 acting together shown double-wide embodiment of the transfer cylinder 02 can this for example, it can also be single or triple wide. The one with the two channels 12, 13 having forme cylinders 03; 08 interacting transfer cylinders 02; 07 from the first two exemplary embodiments (FIGS. 1, 2) can, as in FIGS 7 and their description shown by way of example, flexible with a continuous, with two or more in the longitudinal direction next to each other or in the circumferential direction printing blankets 09 arranged one behind the other, or with several in the longitudinal direction next to each other and simultaneously with several in a row in the circumferential direction arranged printing blankets 09 be occupied. In this case, FIGS. 3 to 7 z. B. also a forme cylinder 03 of double circumference from Figures 1 or 2 and their Description in place of the forme cylinders 03; 08 to step. If necessary, the transfer cylinder 03 can also be more than two in Longitudinal and circumferentially spaced channels 12; 13 have. With the embodiments shown in FIGS. 1 and 2 for the Forme cylinder 03, 08 can also be a conventional type transfer cylinder Assignment (e.g. double size and only one channel, one or two blankets in Longitudinal side by side) or a transfer cylinder of double circumference act together, which two offset in the axial direction next to each other and simultaneously has channels arranged one behind the other in the circumferential direction, and with for example, two blankets offset from one another in the circumferential and longitudinal directions is verifiable.

However, it is advantageous for all variants of the with the forme cylinder 03; 08 interacting transfer cylinder 02; 07 if the latter has at least one Channel 14; 16 in the longitudinal direction, and the at least partially covered channel 12; 13 of the forme cylinder 03; 08 on this channel 14; 16 rolls.

In the following exemplary embodiments, Figures 3 to 7 and associated Description, are some further advantageous embodiments for the arrangement of Printing blankets 09 on a transfer cylinder 02; 07 set out, the Transfer cylinder 02; 07 a plurality of channels 14 running in the longitudinal direction; 16 having. The examples each show two double-width units forming a printing unit Cylinder pairs 01; 06, the two transfer cylinders 02; 07 over the Print substrate 04 work together. The cylinder pairs 01; 06 can, however required, also simple, triple or even four times wide. The lesson from the examples are then to be applied accordingly. In the examples, the Transfer cylinder 02; 07 is twice as large as that of the Forme cylinder 03; 08, here with four in the longitudinal direction next to each other arranged printing plates 11 is occupied. Likewise, the forme cylinder 03; 08 but also with two panorama printing forms arranged next to each other, or one Panorama printing form and two simple printing forms. For all subsequent ones The interacting forme cylinder 03; 08 however be made twice large, it can be with one or with two channels 12; 13, with two in Arranged side by side in the axial direction or one behind the other in the circumferential direction Printing forms 11, or with several in the longitudinal direction side by side and simultaneously with several printing forms arranged one behind the other in the circumferential direction may be occupied. The embodiments shown in Figures 1 and 2 for the with the Transfer cylinders 02; 07 of FIGS. 3 to 7 cooperating forme cylinders 03; 08 are to be applied.

However, it is advantageous for all variants of the with the transfer cylinder 02; 07 from the exemplary embodiments 2 to 4 and 7 interacting forme cylinders 03; 08 if this has at least one channel 12; 13 in the longitudinal direction, and the at least partially covered channel 14; 16 of the transfer cylinder 02; 07 on this unrolls.

Fig. 3 shows the arrangement of two printing blankets 09 on a transfer cylinder 02; 07, which are arranged next to each other in the longitudinal direction and each approximate extend over the full extent. Two channels 14; 16 extend in the longitudinal direction the transfer cylinder 02; 07 and are offset by almost 180 ° in the circumferential direction arranged. The channel 16 is covered and can, especially when not dimensionally stable printing blankets 09, counteract the flexing and as Relief unit relax the elevator. The channel 14 or acts in an advantageous manner the covered channel 16 when the cylinders are developed against one another with the channel 12 of the forme cylinder 03; 08 together. 4, the two printing blankets 09 also be arranged offset from one another in the circumferential direction by 180 °, in which case in each case part of the channel 14 and part of the channel 16 is covered. The order of three or more printing blankets 09 arranged next to one another, particularly in the case of very long cylinders, in an analogous manner, aligned or alternating.

5 shows the arrangement of two printing blankets 09 on one with respect to a newspaper page double wide transfer cylinder 02; 07 depicted with double handling, the are arranged in the circumferential direction one behind the other and each almost over the stretch the entire length of the bale. There are four in the longitudinal direction per printing blanket 09 the transfer cylinder 02; 07 side-by-side newspaper pages transfer. Are more than two channels 14, 16 on the transfer cylinder 02; 07 arranged, the arrangement of a corresponding number of printing blankets 09, or an overlap of channels 14; 16 possible.

Fig. 6 shows the arrangement of four blankets 09 on one, for. B. double width and double large, transfer cylinder 02; 07. Two each in the circumferential direction printing blankets 09 arranged one behind the other are side by side in the longitudinal direction arranged. Similarly, there are more, especially for longer and stronger cylinders to be arranged as two blankets in the longitudinal or circumferential direction. The latter however sets a corresponding number of channels 14; 16 ahead.

7 shows an assignment of the transfer cylinder 02; 07 for example for four Channels 14; 16; 17; 18 with two elevators arranged one behind the other in the circumferential direction 09; 11, in which case every second channel 17; 18 is covered. The same applies to the Arrangement of four channels on forme cylinders 03; 08th

Both for the transfer cylinder 02; 07 as well as for the forme cylinders 03; 08 is each the circumferentially symmetrical arrangement of the channels 12; 13 or 14; 16 with almost the same intermediate angles advantageous, z. B. with two channels 12; 13 or 14; 16 offset by 180 ° in each case, three by 120 ° or alternating by 180 °. With more as two channels 12; 13 or 14; 16 can several in the longitudinal direction juxtaposed printing plates 11 or printing blankets 09 also in Be circumferential to each other.

The ratio of the circumference of the transfer cylinder 02; 07 to that of the forme cylinder 03; 08 is advantageously an integer, in particular in the case of a forme cylinder 03; 08 with in the circumferential direction one behind the other channels 12; 13 for twice the size Scope equal to 1.

The two cylinder pairs 01 and 06 shown in FIGS. 3 to 7 do not have to be in the Equipped with the same number and geometry of channels, or with the same same pattern for the elevators 09; 11 be occupied. However, a vote is advantageous the phases of non-printing areas of the cooperating transfer cylinders 02; 07 so that areas that are not printing, in particular areas of the hidden or uncovered channels interact.

Of course, the form 03 and Transfer cylinder 02 also in the "usual" way, d. H. with several through which Number of channels predetermined number of elevators 09; 11 in the circumferential direction be occupied one after the other.

The assignments shown in Figures 1 to 7 and the associated descriptions the transfer cylinders 02; 07 with blankets 09 are also on top of each other Apply embodiments accordingly. The same applies to the assignment of Forme cylinder 03; 08 and the transfer to the other embodiments in Connection with different versions of the transfer cylinder 02; 07th

In Figures 1 to 7, the channels 12; 13, 14, 16; 17; 18 each up to the front of the Cylinder 02; 04, 07; 08 shown in progress. For example, for reasons of stability However, due to contamination or when using bearer rings on the face side an edge without channel 12; 13; 14; 16; 17; 18 are present. The channels 12; 13; 14; 16; 17; 18 run in this case almost over the entire length of the cylinder 02; 03, 07; 08 or its bale.

The embodiments and examples mentioned for the arrangement of channels 12; 13; 14; 16; 17; 18 and elevators 09; 11 on transfer cylinders 02; 07 and forme cylinders 03; 08 and configurations of printing units with a pair of cylinders 01; 06 from one Transfer cylinder 02; 07 and a cooperating forme cylinder 03; 08 are of course, also to be used in the case when the pair of cylinders 01; 06 not with a second transfer cylinder 07, but with an example as Steel cylinder designed impression cylinder works together.

Under elevator 11 z. B. understood a one-piece pressure plate 11. The elevator 09 for the transfer cylinder 02; 07 represents a one-piece printing blanket 09. This one-piece printing blanket 09 can be single-layer or multi-layer, wherein for the latter, for example, at least one layer 22 on a carrier plate 21 applied and firmly connected to this. The ends 23; 24 of the one or multilayer printing blanket 09 act with one in channel 14; 16; 17; 18 arranged Holding device 26 together.

In particular in connection with narrow openings of the channels 14; 16; 17; 18 to Lateral surface of the transfer cylinder 02; 07 is the formation of the printing blanket 09 advantageous as a multilayer printing blanket 09, which, for example, when unrolling the Forme cylinder 03 on transfer cylinder 02 by flexing its length or width does not change or changes only insignificantly, d. H. is almost dimensionally stable. The Blanket unit 09, as shown in FIG. 8, the almost dimensionally stable carrier plate 21, for example made of metal or plastic, on which the elastic or soft layer 22 is applied (indicated in Fig. 1 and 2). In the present example for the multilayer printing blanket 09 are the ends 23 and 24 of the printing blanket 09 with the Ends of the carrier plate 21 identical, since the carrier plate 21 in the channel 14; 16; 17; 18 cooperating area is bent and uncoated.

The carrier plate 21 of the multilayer printing blanket 09 can be of a different design also be coated up to the ends of the carrier plate 21, in which case the Ends 23 and 24 of the multilayer printing blanket 09 in addition to the carrier plate 21 have the layer 21. If the printing blanket is designed as a simple blanket 09, so act the ends 23; 24 of the rubber blanket 09 with the channels 14; 16; 17; 18 together.

The channels 12; 13 can hold devices 33 for the advantageous embodiment Have printing forms 11.

The holding device 26; 33 can be a known device for power or positive locking and / or tensioning of an elevator 09; 11, such as B. Kraftoder positive mechanisms, driven by spring force or gear Terminal strips or shafts, or tangential drivers.

An advantageous embodiment of a holding device 26; 33 for an elevator 09; 11 in particular for a multilayer printing blanket 09 or a printing form 11, is on Example of a multilayer printing blanket 09 in FIG. 8 using the channel 14 in the Transfer cylinder 02 shown as an example. The arrangement of such or similar holding devices 33 for the printing plates 11 in the channels 12; 13 is exemplarily indicated in Fig: 2.

The holding device 26 is in the axially extending channel 14 of the transfer cylinder 02 arranged to hold the blanket 09. Operation of the device for the Tensioning or holding the multi-part printing blanket 09 takes place via a in the channel 14 of the Transfer cylinder 02 rotatably mounted shaft 27, for example a spindle 27 with Pressure pieces 28.

The parallel to the axis of the transfer cylinder 02, to the tangent of the The lateral surface inclined by 30 to 60 °, in particular by approximately 45 °, has a channel 14 Gap 29 on the outer surface of the transfer cylinder 02 and one inside the Transfer cylinder 02 lying, connected to the gap 29, bore 31. The Width b29 of the gap 29 in the circumferential direction of the lateral surface Transfer cylinder (02; 03; 07; 08) is larger than twice the thickness of one of the ends 23; 24 of the blanket 09, which in the present example is synonymous with the is twice the thickness of the carrier plate 21. The width b29 of the gap 29 is more advantageous Way 1 mm ∋ b29 ∋ 5 mm, especially b29 ∋ 3 mm. In the case of a simple one Rubber blanket 09, the width b29 is slightly larger than twice the thickness of the Rubber blanket 09, in the case of coated up to the ends of the carrier plate 21 multilayer printing blanket 09, the width b29 is insignificantly larger than double Thickness of coated end 23; 24 of the multilayer printing blanket 09 to choose.

The shaft 27, in the example a pivotable spindle 27, is arranged in the bore 31, in which the pressure pieces 28, z. B. stamps, balls or similar, resilient and radial are arranged facing outwards.

To clamp the blanket 09, both ends 23; 24 of the printing blanket 09, in Example synonymous with the ends of the support plate 21, in the gap 29 and the spindle 27 is pivoted with the pressure pieces 28 so that they are almost vertical against the leading and trailing ends 23 and 24 of the blanket 09 and the Carrier plate 21 and a cylinder-fixed wall 32 presses and this non-positively in the gap 29 holds. Are several printing blankets 09 in the circumferential direction of the transfer cylinder 02 Arranged one behind the other, each have a leading and a trailing end 23 and 24 adjacent printing blankets 09 together. The holding device 26 can additionally have a slide, not shown, which in addition to the ends 23 and 24 in the gap 29 can be inserted and closes the gap 29 towards the outside. It is advantageous this slide is connected to the spindle 27, so that it when pivoting the spindle 27 is moved into or out of the gap 29. The width b29 of the gap 29 is at Use of such a slider is made correspondingly larger.

The channels 12; 13 the forme cylinder 03; 08 are preferred as for the Channel 14; 16; 17; 18 also as to the tangent of the lateral surface by 30 to 60 °, in particular by approximately 45 °, slanted narrow slots 12; 13 executed, which one Width b12 (Fig. 1, 2) in the circumferential direction in the area of the lateral surface, the is greater than twice the thickness of the printing form 11. The same applies to the width b12 of the slot 12 advantageously 1 mm ∋ b12 ∋ 5 mm, in particular b12 ∋ 3 mm. For one exemplary schematic representation of the holding device 33 for the printing form 11 is in the for the multi-part printing blanket 09 shown in FIG. 8 only the multi-part printing blanket 09 (from carrier plate 21 and layer 22) by a printing plate 11 with bent, in the Channel 12; 13 reaching ends to replace. The reference number for the width b29 would correspond to the width b12 and the reference symbol for the transfer cylinder 02 of the forme cylinder, e.g. B. 03. The ends 23; 24 correspond to the bent ends of the Printing form 11.

On a holding device 33 in the channels 12; 13 the forme cylinder 03; 08 may to be dispensed with if the ends of the printing form 11 and / or the are shaped Channels 12; 13 a secure hold is guaranteed.

LIST OF REFERENCE NUMBERS

01

Pair of cylinders, first

02

Cylinder, transfer cylinder (01)

03

Cylinders, form cylinders (01)

04

substrate

05

-

06

Pair of cylinders, second

07

Cylinders, transfer cylinders (06)

08

Cylinders, form cylinders (06)

09

Elevator, blanket, blanket

10

-

11

Elevator, printing form, printing plate

12

Channel; Slot (03; 08)

13

Channel; Slot (03; 08)

14

Channel (02.07)

15

-

16

Channel (02.07)

17

Channel (02.07)

18

Channel (02.07)

19

-

20

-

21

Carrier plate (09)

22

Layer (09)

23

End (09)

24

End (09)

25

-

26

holder

27

Shaft, spindle

28

Pressure piece

29

gap

30

-

31

Bore (02; 03; 07; 08)

32

Wall (02; 03; 07; 08)

33

holder

b12

Width (12; 13)

b19

Width (19)

Claims (15)

Printing unit of a rotary printing press with a transfer cylinder (02; 07) with at least two channels (14; 16; 17; 18) arranged offset in the circumferential direction to receive one or more printing blankets (09), one with the transfer cylinder (02; 07) as a pair of cylinders (01; 06) interactingly arranged forme cylinder (03; 08) and a counter-pressure cylinder which interacts with the transfer cylinder (02; 07) and is different from a second transfer cylinder, characterized in that the transfer cylinder (02; 07) has three in the longitudinal direction of the transfer cylinder ( 02; 07) has printing blankets (09) arranged next to one another and each approximately over the entire circumference, the ends of which are alternately offset in the circumferential direction, and that the forme cylinder (03; 08) cooperating with the transfer cylinder (02; 07) in Has circumferential direction two channels (12; 13) arranged one behind the other. Printing unit according to claim 1, characterized in that the printing blankets (09) are each constructed in multiple layers, comprising a carrier plate (21) and a layer (22) connected to the carrier plate (21), Printing unit according to claim 1, characterized in that the printing blankets (09) are arranged with their ends offset in the circumferential direction from one another in different channels (14; 16; 17; 18). Printing unit according to claim 1, characterized in that the bale of the transfer cylinder (02; 07) has a circumference which corresponds to at least two lying or standing newspaper pages. Printing unit according to claim 1, characterized in that the bale of the transfer cylinder (02; 07) has a width which corresponds to approximately six lying or standing newspaper pages. Printing unit according to claim 1, characterized in that the channel (14; 16; 17; 18) of the transfer cylinder (02; 07) has a gap (29) with a width (b29) in the circumferential direction in the region of the lateral surface which is larger than that twice the thickness of one of the ends (23; 24) of the printing blanket (09) and in the range between 1 mm and 5 mm, in particular less than or equal to 3 mm. Printing unit according to claim 1, characterized in that the printing blanket (09) is designed as a rubber blanket (09). Printing unit according to claim 1, characterized in that the ratio of the circumference of transfer (02; 07) to forme cylinder (03; 08) is an integer. Printing unit according to claim 1, characterized in that at least one of the channels (14; 16; 17; 18) of the transfer cylinder (02; 07) rolls in the region of a channel (12; 13) on the circumference of the forme cylinder (03; 08). Printing unit according to claim 1, characterized in that the forme cylinder (03; 08) cooperating with the transfer cylinder (02; 07) has two channels (12; 13) arranged one behind the other in the circumferential direction. Printing unit according to claim 1, characterized in that the channels (12; 13; 14; 16; 17; 18) are evenly spaced in the circumferential direction. Printing unit according to claim 1, characterized in that two channels (12; 13; 14; 16; 17; 18) are arranged offset from one another in the circumferential direction by approximately 180 °. Printing unit according to claim 1, characterized in that each channel (14; 16; 17; 18) of the transfer cylinder (02; 07) each has at least one holding device (26) for the printing blanket (09). Printing unit according to claim 1, characterized in that the bale of the forme cylinder (03; 08) has a circumference which corresponds to at least two lying or standing newspaper pages. Printing unit according to claim 1, characterized in that the transfer cylinder (02; 07) and the forme cylinder (03; 08) have the same circumference.

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