EP1361051B9 - Printing group 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 the DE 44 29 210 A1 the arrangement of four in the direction of rotation of a forme cylinder successively arranged printing foils is known, which are held in four pits. The printing foils each span a circular arc section lying between two pits.

The DE 44 29 891 A1 shows a printing unit of a rotary printing machine with double-sized transfer cylinder (ie, two section lengths around the circumference), which cooperates with a simple large form cylinder.

Also is through the DE 198 03 809 A1 an arrangement of cylinders of an offset printing unit is known in which the circumference of the transfer cylinder to that of the forme cylinder is in a double ratio. The form cylinder is in the circumferential direction with a printing form and in its longitudinal direction with at least four standing printed pages in the broadsheet format, or equivalent number of standing or lying tabloid or book formats, assignable. In the circumferential direction of the transfer cylinder for receiving two in the longitudinal direction of the cylinder juxtaposed blankets a single, either longitudinally continuous or longitudinally divided and offset by 180 °, slot arranged. The blanket is, for example, two-ply designed as a fixed to a support plate rubber blanket.

In the DE 34 41 175 C2 be for the purpose of relaxing the blanket Recesses proposed in the cylinder surface of the transfer cylinder. Between cylinder and blanket can also be arranged for this purpose a pad that does not have the entire length of the blanket in the circumferential direction and has an interruption. To accommodate the interrupted pad a slot is provided on the circumference of the cylinder next to the clamping channel for the blanket. The arranged in the longitudinal direction of the transfer cylinder recesses and the rubber blanket receiving channel are arranged so that they act together in the contact region with the channel of the plate cylinder.

The DE 197 40 575 A1 shows cooperating forming and transfer cylinder, wherein in one embodiment, the transfer cylinder in the circumferential direction one behind the other two clamping channels and two held in the clamping channels rubber blankets. In another example, a double-sized transfer cylinder interacts with a double-sized forme cylinder, but both cylinders have only one chucking channel in the circumferential direction. In all examples, the channels do not roll off each other.

By the DE-OS 19 60 635 a single form cylinder is disclosed, which has on its circumference in the circumferential direction a plurality of channels for the attachment of printing plates. When occupying the forme cylinder with a printing forme in the circumferential direction, at least one of the channels can be covered.

The GB 1 476 707 A discloses primarily a printing unit for direct printing, whose form and impression cylinders are designed with a width for printing six juxtaposed newspaper pages. The forming and impression cylinders forming the printing nip here have sections of channels for receiving elevators, which reduce the formation of vibrations in the circumferential direction relative to each other are offset. Reference is made to the corresponding problem in the case of an offset printing unit in the gap between the forming and transfer cylinders.

By the US 5,687,648 A is a multi-layer blanket of a support plate and an elastic layer described, the ends in a channel with a slot width to the lateral surface of z. B. 1 mm are held.

In the GB 2 092 069 A is a printing unit with a form and a transfer cylinder disclosed, wherein the form cylinder side by side carries a plurality of pairs of printing plates, each covering 180 ° of the circumference. Their ends are held in two diametrically opposed channels. The transfer cylinder carries on its periphery several layers of padding and ink-bearing material, the layers extend around the entire circumference and are held with the ends in a single channel.

In an article of the Ifra newspaper technology from October 1991, pages 48 - 50, "The KBA journal - a small sister for the Commander and the express The transfer cylinder has two full-circumference blankets in two 180 ° offset channels and 18 mm wide channels, and the transfer cylinder comprises two full-length receiving slots and eight printing formers or four panoramic printing plates and lighter-built machine designed for small and medium runs and is intended to expand the newspaper's rotation program downwards.

In the Issue of Ifra-Zeitungstechnik, September 1991, pages 150, 152, 154, 156, 158, "6-plate wide newspaper machines - history and facts "For high-end newspapers, a concept for printing six juxtaposed newspaper pages is disclosed, in which the forme cylinder has two, three or four printing plates in the circumferential direction and six plates in the width Illustration of a plate scheme for the 2X6 concept, two by six plates are arranged side by side. No information is given about the actual arrangement of the plates and / or channels on the cylinder.

The GB 2 092 069 A discloses a pair of cylinders with a form cylinder and a transfer cylinder, wherein viewed in a cross section of the forme cylinder in series two channels for receiving printing plates, and the transfer cylinder has a channel for receiving blanket ends.

The EP 0 849 080 A1 discloses a channel cover which can be used in both forming and transfer cylinders. In one example of a transfer cylinder, the latter has two channel sections which are offset by 180 ° in the circumferential direction and in which, in the axial direction, a front and a rear rubber blanket are arranged offset from one another in the circumferential direction.

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

The object is achieved by the features of claim 1.

The arrangement of a plurality of extending in the longitudinal direction of the forming and / or transfer cylinder channels will meet a variety of requirements as needed, without having to replace the cylinder with changing requirements of existing printing presses or to consider each production profile individually in the production.

It is particularly advantageous that both different formats of the lifts, in the circumferential and longitudinal direction of the cylinder, as well as different constellations and phase shifts of mutually interacting cylinders considered, and thus in terms of competing requirements for register, vibration, arrangement of the rolling pressure areas and minimizing the non-printable paper are optimized as needed.

An advantageous embodiment of a forme cylinder with double circumference, d. H. For example, two newspaper pages in the circumferential direction, allows either the assignment with circumferentially successively arranged printing forms or with reaching to the full extent printing forms, wherein a channel is covered. The arrangement of over the full extent reaching printing forms reduced z. B. significantly the changeover time. Also, in the case of a transfer cylinder, an array of blankets extending the full circumference significantly reduces the changeover time.

By arranging at least two channels which are approximately continuous in the longitudinal direction on a transfer cylinder, a large number of possibilities for arranging elevators, for example blankets, are created. Advantageous in terms of the quality of the processing of the printed image compared to double-sized cylinders with only one channel is in the arrangement of multiple channels also that in the case of blankets that extend around the full extent, a covered channel at the same time to relax the elevator can serve.

When a channel is covered by a printing form, it is advantageous due to the risk of breakage to arrange the forme cylinder and the transfer cylinder so that the covered channel rolls on a channel of the transfer cylinder. The unwinding of a covered by a blanket channel of the transfer cylinder on a channel of the forme cylinder is in terms of a further improved relaxation of the blanket on passage of the channels to each other, and thus advantageous for the unrolled print image.

The arrangement of several juxtaposed in the longitudinal direction of the cylinder, each extending almost over the entire circumference extending elevators has z. B. advantages in terms of handling and individual interchangeability. This is especially true for long cylinders, as is the case for triple (eg six newspaper pages) wide cylinders.

The embodiment of the elevators for the transfer cylinder as a multi-layer or multi-layer printing blanket, which has a carrier plate and a support or layer connected thereto, is advantageous with regard to the quality of the development of the printed image. Especially with large dimensions, a dimensionally stable design is essential for a print quality that is consistently good and register-accurate over the circumference of the cylinder.

Also advantageous is the formation of the channels with a narrow opening to the outer surface of the cylinder, z. B. to reduce paper consumption. For channels of the forme cylinder, a narrow opening is particularly advantageous, in particular for channels which are covered at least in part. For example, this can further reduce the risk of breakage.

Furthermore, it is advantageous to perform the circumferential ratio of the transmission to the forme cylinder integral and to arrange the channels on the cylinder in the circumferential direction symmetrically.

Examples are shown in the drawings and will be described in more detail below.

Fig. 1

ein in doppelt breiter Ausführung nicht beanspruchtes 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 in doppelt breiter Ausführung nicht beanspruchtes 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 in doppelt breiter Ausführung nicht beanspruchte 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

ein mehrschichtiges Drucktuch mit Kanal und Halteeinrichtung.

Show it:

Fig. 1

a cylinder pair not claimed in a double-wide design, wherein the forme cylinder is formed with two longitudinally extending channels and the elevators on the forme cylinder extend almost over the full circumference;

Fig. 2

a cylinder pair unstretched in a double-width design, wherein the forming and transfer cylinder is formed with each two longitudinally extending channels and the elevators extend on the forming and transfer cylinder almost over the full circumference;

Fig. 3

two cylinder pairs unstretched in a double-width design, wherein the transfer cylinder is formed with two longitudinally extending channels and is covered with two elevators extending almost over the full circumference and lying side by side in the longitudinal direction;

Fig. 4

a multi-layered blanket with channel and holding device.

A printing unit of a rotary printing machine has at least one pair of cylinders 01 consisting of two cylinders 02; 03, for example, a transfer cylinder 02 and cooperating with this form cylinder 03. The transfer cylinder 02 can act on the printing substrate 04 to be printed with a counter-pressure cylinder, not shown, or with a transfer cylinder 07 of a second cylinder pair 06, 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 blanket 09, and the forme cylinder 03; 08 each with at least one elevator 11, for example, a printing plate 11, assignable.

Depending on the requirements of the print formats and the printing performance, as well as the possibilities in the paper guide, the cylinder pairs 01; 06 different widths executed. For example, the cylinder pairs 01; 06 for newspaper printing three times wide, just wide the width of the bale, such as the forme cylinder 03, for two standing or lying newspaper pages. In commercial printing, double-width refers to the required width for four horizontal or six vertical A4 pages. The sizes of transmission 02; 07 and the forme cylinder 03; 08 are each made simple or double, based on a variety of standing or lying formats, such as a standing or lying newspaper format. Advantageous constellations in newspaper printing, for example, a double-sized, ie two sides in the circumferential direction, the transfer cylinder 02; 07 acting together with a double or simple circumference of the forme cylinder 03; 08, each double width.

Fig. 1 shows an unclaimed double-wide pair of cylinders 01, wherein transfer cylinder 02 and forme cylinder 03 each have a double circumference. The forme cylinder 03 has two longitudinally extending and circumferentially spaced channels 12; 13 for receiving the ends of at least one printing plate 11, the transfer cylinder 02 a channel 14 for receiving the ends of at least one 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, viewed in a direction perpendicular to the axis of rotation cross section, arranged in the circumferential direction one behind the other. The forme cylinder 03 is occupied in the example with four in the longitudinal direction of the cylinder juxtaposed printing plates 11, for example, pressure plates 11, which are each held with its two ends in the channel 12, extend to the region of the channel 12 respectively around the entire circumference and respectively cover the channel 13. In order to prevent a risk of breakage, forme cylinder 03 and transfer cylinder 02 are advantageously arranged relative to one another in such a way that the covered channel 13 cooperates with the channel 14 of the transfer cylinder 02 during the rolling of the cylinder. The latter is not required if z. B. the channel 13 is closed by means of a releasable lid or the channel width is so small that a break is avoided. The claimed form cylinder 03 is made three times wide. He can be flexible in many ways, eg. B. with a continuous, or two or more longitudinally juxtaposed printing plates 11 of various formats (eg, simple, panoramic) be occupied. If necessary, the forme cylinder 03 may also have more than two longitudinally extending and circumferentially spaced channels 12; 13 have. The transfer cylinder 02 in Fig. 1 may have a continuous channel 14, in which two blankets 09 are held in the axial direction next to each other.

Also, the transfer cylinder 02 can, as exemplified in Fig. 2 shown a second, z. B. diametrically opposite and extending in the longitudinal direction of the transfer cylinder 02 channel 16. The channels 14; 16 of the transfer cylinder 02, 07 are at least on a partial section in the longitudinal direction of the transfer cylinder 03; 08, viewed in a direction perpendicular to the axis of rotation cross section, arranged in the circumferential direction one behind the other. In the unclaimed example covers a single, extending to the region of the channel 14 over the entire length of the bale and almost over the entire circumference blanket 09 the transfer cylinder 02. The forme cylinder is here by way of example with two in the longitudinal direction of the cylinder adjacent, and each occupied by almost the full circumference extending pressure plates 11. The covered channel 13 acts in the example when unrolling the cylinder pair 01 with the also covered channel 16 of the transfer cylinder 02 together. However, it can, as in the first example, roll on the uncovered channel 14.

Unlike in the Figures 1 and 2 with the forme cylinder 03; 08 together acting unclaimed double-width embodiment of the transfer cylinder 02 this invention is made three times wide. The with the two channels 12, 13 having the form of cylinders 03; 08 cooperating transfer cylinder 02; 07 from the first two examples ( Fig. 1, 2 ) is occupied by two or more longitudinally juxtaposed blankets 09. In FIG. 3 can z. As well as a forme cylinder 03 double circumference of the Figures 1 or 2 and their description in place of in FIG. 3 illustrated forme cylinder 03; 08 kick. With the according to Fig. 1 and 2 For the forme cylinder 03, 08 shown embodiments, a transfer cylinder of conventional design and occupancy (eg, doubly large and only one channel, one or two blankets in the longitudinal direction next to each other) can work together.

In the following example, FIG. 3 and related description, is a further advantageous embodiments of the arrangement of Drucktüchem 09 on a transfer cylinder 02; 07 set forth, wherein the transfer cylinder 02; 07 a plurality of longitudinally extending channels 14; 16 has. The example shows two compression unit forming, unclaimed double-wide cylinder pairs 01; 06, wherein the two transfer cylinders 02; 07 on the substrate 04 together. The claimed cylinder pairs 01; 06 are, however, three times wide. The teaching from the examples should then be applied accordingly. In the example, the transfer cylinder 02; 07 twice as large extent as that of the forme cylinder 03; 08, which is here occupied with four longitudinally juxtaposed printing plates 11. Likewise, the forme cylinder 03; 08 but also with two juxtaposed panoramic printing plates, or a panorama printing form and two simple printing forms be occupied. For the following example, the co-operating form cylinder 03; 08 but also be made double in size, he can with one or, as claimed, with two channels 12; 13, with two in the axial direction next to each other or in the circumferential direction successively arranged printing plates 11, or with a plurality of longitudinally adjacent to each other and at the same time with a plurality of circumferentially successively arranged printing forms be occupied. Also in the Figures 1 and 2 illustrated embodiments for the with the transfer cylinders 02; 07 of the FIGS. 3 to 7 co-operating form cylinder 03; 08 are to be applied.

Fig. 3 shows the arrangement of two blankets 09 on a transfer cylinder 02; 07, which are arranged side by side in the longitudinal direction and each extending approximately over the full circumference. Two channels 14; 16 extend in the longitudinal direction of the transfer cylinder 02; 07 and are arranged offset in the circumferential direction almost 180 °. The channel 16 is covered and can counteract the walking and relax as a relief unit the elevator. In an advantageous manner, the channel 14 or the covered channel 16 acts upon settlement of the cylinder against each other with the channel 12 of the forme cylinder 03; 08 together. The claimed arrangement of three juxtaposed blankets 09, especially for very long cylinders, is done in an analogous manner in alignment.

Both for the transfer cylinder 02; 07 as well as for the forme cylinder 03; 08 is in each case the circumferentially symmetrical arrangement of the channels 12; 13 and 14, respectively; 16 with almost identical intermediate angles advantageous, z. B. at two channels 12; 13 and 14, respectively; 16 offset by 180 °, with three by 120 ° or alternately by 180 °. With more than two channels 12 each; 13 and 14, respectively; 16, a plurality of longitudinally juxtaposed pressure plates 11 may be offset from each other in the circumferential direction.

The ratio of the circumference of the transfer cylinder 02; 07 to the forme cylinder 03; 08 is advantageous integer, in particular for the case of a forme cylinder 03; 08 with circumferentially arranged in succession channels 12; 13 at twice the size equals 1.

In the Fig. 3 shown two cylinder pairs 01 and 06 need not be equipped in the same way with the same channel number and geometry, or with the same pattern for the elevators 09; 11 be occupied. However, it is advantageous to tune the phases of non-printing areas of the co-operating transfer cylinder 02; 07 so that non-printing areas, in particular areas of hidden or not covered channels cooperate.

Of course, the in Fig. 1 to 3 described form 03 and transfer cylinder 02 also in the "usual" way, ie with several, predetermined by the number of channels number of elevators 09; 11 be occupied in the circumferential direction one behind the other.

The in the FIGS. 1 to 3 and the descriptions associated with assignments of the transfer cylinders 02; 07 with blankets 09 are also applicable to the other embodiments accordingly. The same applies to the assignment of the forme cylinder 03; 08 and the transfer to the other embodiments in connection with different embodiments of the transfer cylinder 02; 07th

In the FIGS. 1 to 3 are the channels 12; 13, 14, 16; 17; 18 respectively to the front side of the cylinder 02; 04, 07; 08 shown running. However, for reasons of stability, for reasons of pollution or when using bearer rings, however, an edge without a channel 12 can be provided on the front side; 13; 14; 16; 17; 18 present. The channels 12; 13; 14; 16; 17; 18 extend in this case almost over the entire length of the cylinder 02; 03, 07; 08 or its bale.

The mentioned embodiments and examples 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 as well as configurations of printing units with a pair of cylinders 01; 06 from a transfer cylinder 02; 07 and a co-operating form cylinder 03; 08 are of course also apply to the case when the cylinder pair 01; 06 does not cooperate with a second transfer cylinder 07, but with an example, designed as a steel cylinder impression cylinder together.

Under elevator 11 is here z. B. understood a one-piece pressure plate 11. The elevator 09 for the transfer cylinder 02; 07 represents a one-piece blanket 09. This one-piece blanket 09 may be single-layered or multi-layered, wherein for the latter on a support plate 21, for example, at least one layer 22 is applied and firmly connected thereto. The ends 23; 24 of the single or multi-layer blanket 09 act with a 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 the lateral surface of the transfer cylinder 02; 07 toward the formation of the blanket 09 is advantageous as a multi-layer blanket 09, which does not or only insignificantly changes when rolling example, the forme cylinder 03 on the transfer cylinder 02 by walking its length or width, that is almost dimensionally stable. For this purpose, the blanket unit 09, as in Fig. 4 shown, the almost dimensionally stable support plate 21, for example of metal or plastic, on which the elastic or soft layer 22 is applied (indicated in FIG Fig. 1 and 2 ). In the present example of the multi-layer printing blanket 09, the ends 23 and 24 of the blanket 09 are identical to the ends of the support plate 21, since the support plate 21 in with the channel 14; 16; 17; 18 cooperating area is bent and uncoated.

The support plate 21 of the multi-layer printing blanket 09 may be coated in another embodiment also up to the ends of the support plate 21, in which case the ends 23 and 24 of the multilayer blanket 09 next to the support plate 21 and the layer 21 have. If the blanket is designed as a simple rubber blanket 09, the ends 23 act; 24 of the blanket 09 with the channels 14; 16; 17; 18 together.

Also the channels 12; 13 may have holding devices 33 for the printing plates 11 in an advantageous embodiment.

The holding device 26; 33 may be a known device for non-positive or positive holding and / or clamping a lift 09; Be 11, such. B. force or form-locking mechanisms, via spring force or gear driven terminal strips or shafts, or tangential driver.

An advantageous embodiment of a holding device 26; 33 for a lift 09; 11, in particular for a multi-layer printing blanket 09 or a printing plate 11, is the example of a multi-layer printing blanket 09 in Fig. 4 shown representative of the channel 14 in the transfer cylinder 02. The arrangement of such or similar holding means 33 for the printing plates 11 in the channels 12; 13 is an example in Fig. 2 indicated.

The holding device 26 is arranged in the axially extending channel 14 of the transfer cylinder 02 for holding the blanket 09. The operation of the device for clamping or holding the multi-part blanket 09 via a rotatably mounted in the channel 14 of the transfer cylinder 02 shaft 27, for example, a spindle 27 with pressure pieces 28th

The parallel to the axis of the transfer cylinder 02 extending to the tangent of the lateral surface by 30 to 60 °, in particular by about 45 °, inclined channel 14 has a gap 29 on the lateral surface of the transfer cylinder 02 and a lying inside the transfer cylinder 02, with the Gap 29 connected, bore 31. The width b29 of the gap 29 in the region of the lateral surface in the circumferential direction of the transfer cylinder 02; 03; 07; 08 is greater than twice the thickness of one of the ends 23; 24 of the blanket 09, which in the present example is equivalent to twice the thickness of the support plate 21. For the width b29 of the gap 29 is advantageously 1 mm ≤ b29 ≤ 5 mm, in particular b29 ≤ 3 mm. In the case of a simple blanket 09, the width b29 is insubstantially greater than twice the thickness of the blanket 09, in the case of the multi-layer blanket 09 coated to the ends of the carrier plate 21, the width b29 is insignificantly greater than twice the thickness of the coated end 23; 24 of the multi-layer blanket 09 to choose.

In the bore 31, the shaft 27, in the example, a pivotable spindle 27, arranged in which the pressure pieces 28, z. B. stamp, balls or similar, are arranged directed resiliently and radially outward.

For clamping the blanket 09 both ends 23; 24 of the blanket 09, in the example equivalent to the ends of the support plate 21, guided in the gap 29 and the spindle 27 with the pressure pieces 28 so pivoted that this almost perpendicular to the leading and trailing end 23 and 24 of the blanket 09 and the support plate 21 and a cylinder-fixed wall 32 presses and holds this non-positively in the gap 29. If a plurality of printing blankets 09 are arranged one behind the other in the circumferential direction of the transfer cylinder 02, a forward and a trailing end 23 and 24 of adjacent printing blankets 09 act together in each case. The holding device 26 may additionally comprise a slide, not shown, which in addition to the ends 23 and 24 in the gap 29 can be inserted and the gap 29 terminates to the outside. Advantageously, this slide is connected to the spindle 27, so that it is moved in pivoting of the spindle 27 in or out of the gap 29. The width b29 of the gap 29 is formed correspondingly larger when using such a slider.

The channels 12; 13 of the forme cylinder 03; 08 are in a preferred embodiment 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 °, inclined narrow slots 12; 13, which has a width b12 (FIG. Fig. 1, 2 ) in the region of the lateral surface in the circumferential direction, which is greater than twice the thickness of the printing plate 11. For the width b12 of the slot 12, advantageously 1 mm ≦ b12 ≦ 5 mm, in particular b12 ≦ 3 mm. For an exemplary schematic representation of the holding device 33 for the printing plate 11 is shown in the multi-part blanket 09 Fig. 4 only the multi-part blanket 09 (from support plate 21 and layer 22) by a printing plate 11 with bent, in the channel 12; To replace 13 reaching ends. The reference number for the width b29 would correspond to the width b12 and the reference numeral for the transfer cylinder 02 of the forme cylinder, z. B. 03. The ends 23; 24 correspond to the bent ends of the printing forme 11.

On a holding device 33 in the channels 12; 13 of the forme cylinder 03; 08 can be omitted if by means of shaping the ends of the printing plate 11 and / or the channels 12; 13 a secure holding is guaranteed.

LIST OF REFERENCE NUMBERS

01

Cylinder pair, first

02

Cylinder, transfer cylinder (01)

03

Cylinder, forme cylinder (01)

04

substrate

05

-

06

Cylinder pair, second

07

Cylinder, transfer cylinder (06)

08

Cylinder, forme cylinder (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 (20)

1. Printing unit of a rotary printing press, comprising a transfer cylinder (02; 07), a forme cylinder (03; 08) arranged so as to cooperate with the transfer cylinder (02; 07) as a pair of cylinders (01; 06) and a cylinder cooperating with the transfer cylinder (02; 07) via a print medium (04), the body of the transfer cylinder (02; 07) and of the forme cylinder (03; 08) being formed so as to have triple width and having in each case a width which corresponds to about six horizontal or vertical newspaper pages, and the forme cylinder (03; 08) having, in the circumferential direction, two channels (12; 13) offset approximately by 180° relative to one another, characterized in that the two channels (12; 13) of the forme cylinder (03; 08) each extend up to the end face or, except for an end edge, virtually over the total length of a body of the forme cylinder (03; 08), in that the transfer cylinder (02) has three printing blankets (09) arranged side by side in the longitudinal direction of the transfer cylinder (02) and in each case approximately over the total circumference, in that the transfer cylinder (02; 07) has, in the longitudinal direction, a continuous channel (14) in which the three printing blankets (09) are held flush next to one another in the axial direction, and in that the packing (09) has a multilayer form, having a backing plate (21) and a layer (22) connected to the backing plate (21).
2. Printing unit according to Claim 1, characterized in that the channel (14; 16; 17; 18) of the transfer cylinder (02; 07) has a gap (29b) of 1 to 5 mm in the circumferential direction in the region of the lateral surface.
3. Printing unit according to Claim 1, characterized in that bearer rings are provided on the cylinders (02; 03; 07; 08).
4. Printing unit according to Claim 1, characterized in that the packing (09) of the transfer cylinder (02) extends virtually over the total circumference, except for the region of a channel (14).
5. Printing unit according to Claim 1, characterized in that the channels (12; 13) of the forme cylinder (03; 08) are inclined by 30° to 60° relative to the tangent of the lateral surface.
6. Printing unit according to Claim 5, characterized in that the inclination is about 45°.
7. Printing unit according to Claim 1, characterized in that the channels (12; 13) of the forme cylinder (03; 08) have retaining devices (33) driven by means of spring force and intended for the printing formes (11).
8. Printing unit according to Claim 1, characterized in that the cylinder cooperating via the print medium (04) is in the form of a counter pressure cylinder differing from a second transfer cylinder.
9. Printing unit according to Claim 1, characterized in that the cylinder cooperating via the print medium (04) is in the form of a transfer cylinder (07) of a second pair of cylinders (06).
10. Printing unit according to Claim 1, characterized in that forme cylinder (03; 08) and transfer cylinder (02; 07) have the same circumference.
11. Printing unit according to Claim 1, characterized in that the body of the transfer cylinder (02; 07) has a circumference which corresponds to at least two horizontal or vertical newspaper pages.
12. Printing unit according to Claim 1, characterized in that the channel (12; 13; 14; 16; 17; 18) has at least one retaining device.
13. Printing unit according to Claim 1, characterized in that the ratio of the circumference of transfer cylinder (02; 07) to that of forme cylinder (03; 08) is integral.
14. Printing unit according to Claim 1, characterized in that the printing formes (11) are arranged with their ends in a channel (12; 13) or at least in alignment along the forme cylinder (03; 08).
15. Printing unit according to Claim 1, characterized in that the forme cylinder (03; 08) has a plurality of printing formes (11) arranged one behind the other in the circumferential direction.
16. Printing unit according to Claim 1, characterized in that the body of the forme cylinder (03; 08) has a circumference which corresponds to at least two horizontal or vertical newspaper pages.
17. Printing unit according to Claim 1, characterized in that the channel (12; 13) of the forme cylinder (03; 08) has, in the region of the lateral surface, in the circumferential direction, a width (b12) which is greater than twice the thickness of the printing forme (11) and in the range between 1 mm and 5 mm, in particular less than or equal to 3 mm.
18. Printing unit according to Claim 1, characterized in that the channel (12; 13; 14; 16; 17; 18) has at least one retaining device (26; 33).
19. Printing unit according to Claim 1, characterized in that the packing (09) has a multilayer form, having a backing plate (21) and a layer (22) connected to the backing plate (21).
20. Printing unit according to Claim 2, characterized in that bearer rings are provided on the cylinders (02; 03; 07; 08).

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