EP0749369A1

EP0749369A1 - Printing group for a colour-printing web-fed rotary press

Info

Publication number: EP0749369A1
Application number: EP95911209A
Authority: EP
Inventors: Wolfgang Günter Ruckmann; Martin Heinz Schoeps
Original assignee: Koenig and Bauer Albert AG
Current assignee: Koenig and Bauer AG
Priority date: 1994-03-10
Filing date: 1995-03-07
Publication date: 1996-12-27
Anticipated expiration: 2015-03-07
Also published as: DE4408025A1; BR9507037A; CN1081986C; DE59500984D1; JP3399535B2; JPH09509906A; EP0749369B1; RU2129961C1; US5782182A; CN1143927A; WO1995024314A1

Abstract

A colour-printing web-fed rotary press for first and second form printing has printing units arranged in a bridge design. At their printing spots, the bridge units may be symmetrically distributed in the vertical direction and are horizontally movable, so that a low overall height is achieved.

Description

description

Printing unit for one

Multi-color web rotary printing machine

The invention relates to a printing unit for a multi-color web-fed rotary printing press for face and back printing, in accordance with the preamble of patent claim 1.

Through a company brochure from the company MAN - Roland Druckmaschinen AG, (DE), (RA GEO 08.93.1), tower-type printing units arranged in an H-shape have become known. B. H on H as a so-called figure of eight tower. A H-shaped printing unit consists of two U-shaped printing units arranged in mirror image to each other, which is also referred to as a U-printing unit and each has four bridges.

A disadvantage of these pressure units arranged one above the other in tower construction is that, for. B. between the two H-shaped printing units placed one on top of the other, the paper web to be printed has to travel a relatively long way between the printing points, which can lead to registration problems. In addition, the above-mentioned printing units have a large overall height, so that the operating personnel in at least two levels of different heights must operate. Finally, it is also disadvantageous that the inking units assigned to the printing units have one color flow direction from top to bottom and one color flow direction from bottom to top according to the mirror-image arrangement of the individual U-shaped printing units, which can lead to different color behavior.

The invention has for its object to provide a printing unit for a multi-color web-fed rotary printing press for face and back printing in a low overall height with the same performance parameters compared to the prior art of Tecknik.

According to the invention, this object is achieved by the features of the characterizing part of patent claim 1.

The following advantages are achieved in particular by the invention:

The printing press according to the invention has a low overall height and thus less weight, which among other things also reduces the costs for the machine foundation. As a result of the reduced overall height of the machine, operability is achieved on only one level. The color flow in each printing unit always has the same direction, so that the same color behavior is achieved in all printing units. Due to the lower overall height at start-up and Braking operations, e.g. B. when changing the printing plate, the amount of waste is reduced. Furthermore, the costs for a possible encapsulation of the machine are reduced due to the lower overall height. Such encapsulation can be important for reasons of sound insulation or for heat recovery in connection with air purification. Furthermore, by reducing the overall height, the vibrations generated in a printing press are reduced. In addition, the so-called fan-out effect is weakened in its effect by the reduced overall height of the printing press and when using a wet offset printing process. Conventional printing processes reduce registration problems. Finally, printing units of the printing press according to the invention can also be used as an additional printing unit or as a printing unit for a flying printing plate change (imprinter).

This means that the purchase of expensive systems for a so-called computer to press process can be avoided.

The invention is explained in more detail below using several exemplary embodiments. The associated drawings show in

1 is a schematic side view of a printing unit according to the invention in the working position, 2 is a schematic side view of FIG. 1, but in the rest position,

3 is a partial section III - III of FIG. 1, but without showing the fountain solution application roller,

4 shows a partial top view of the uppermost bridge printing unit according to FIG. 1, omitting frame parts and without a printing plate changing device and without a dampening and inking unit in a further exemplary embodiment, rotated counterclockwise by 90 °,

5 is an illustration corresponding to FIG. 4, in a different drive position,

6 is an illustration corresponding to FIG. 4, but with a different drive,

7 is an illustration corresponding to FIG. 4, but with a single drive,

8 is an enlarged view of a printing unit with an anilox inking unit,

9 shows a detail X according to FIG. 8, 10 is a schematic representation of the arrangement of a bridge printing unit,

11 is a side view of a so-called eight-high tower with stacked H-shaped printing units according to the prior art,

12 is a schematic side view of the printing units of FIG. 1 in a reduced view,

Fig. 13 is an enlarged view of a printing unit with a conventional inking unit.

Upper carrier 87, 88 and lower, horizontally running lower carrier 104, 105 of a multi-color web-fed rotary printing press accommodate a plurality of printing units arranged one above the other in a left frame part 1, 6 in a carrier-fixed manner. The printing unit units are each designated 2, 3, 4 and 5 as left printing units. Between the beams 87, 88; 104, 105 there is also a right frame part 9, 10 which can be moved on rollers 7, 8 and which accommodates right-hand printing units 11, 12, 13, 14 (FIG. 4). Each printing unit 2 to 5 and 11 to 14 each consists of a blanket cylinder 16 which cooperates with a forme cylinder 17. The forme cylinder 17 receives dampening solution via an overall dampening unit designated 18 and ink over an overall fed with 19 designated inking unit. The inking unit 19 can, for. B. consist of an ink pan 21 with an inking roller 22 (Fig. 8), the inking roller 22 transfers its printing ink by means of inking rollers 23, 24 to the forme cylinder 17. Instead of two inking rollers 23, 24 of the same size, only a smaller or larger inking roller can be used. Instead of an ink pan 21 and an ink roller 22 z. B. also a chamber doctor blade can be used in connection with an anilox roller (anilox roller). However, a conventional inking unit can also be used (Fig. 13). Each dampening unit 18 can be designed as a spray dampening unit, which consists of a known spray device 26, for. B. there is a bar with spray nozzles, which direct their spray jets onto a dampening roller 27. This dampening solution application roller 27 is connected to the forme cylinder 17.

The between the carriers 87, 88; 104, 105 stationarily arranged printing units 2 to 5 and the between the carriers 87, 88; 104, 105 in displaceable frame parts 9, 10 one above the other printing units 11 to 14 are each arranged with their blanket cylinder 16 directed against each other, so that a paper web 28 or 29 can be printed on both sides. The possible points of contact of the blanket cylinders 16 with one another (minus the thickness of the paper web 28 or 29) are designated 31, 32, 33, 34 (FIG. 1), so that the printing units 2 with 11, 3 with 12, 4 with 13 and 5 with 14 each form a bridge printing unit or a printing unit in bridge construction, which are arranged vertically divisible and horizontally displaceable at their printing point 31 to 34.

The displaceable frame 9, 10 is by means of two double-acting cylinders 36, 37, z. B. hydraulic cylinder, actuated. The working cylinder 36, 37 is mounted fixed to the side frame and the end of the piston rod remote from the cylinder is articulated to the displaceable frame 9, 10, in each case on its top and bottom. The frame 9, 10 in each case has a guide bar 38 on its upper side, which is guided in a groove 39 located in the carriers 87, 88 and open at the bottom. To ensure that the guide bar 38 runs smoothly in the groove 39, the flanks of the guide bar 38 can have recesses for receiving bearing balls which support the guide bar 38 against the side walls of the groove 39 located in the carriers 87, 88. In order to achieve a high accuracy of fit when retracting the displaceable frame 9 and 10 from the rest position (FIG. 2) to the working position (FIG. 1), the frame 9 and 10 has a plurality of pins 42 protruding beyond the closing edge 41 on its vertical closing edge 41, 43, the blind holes 46 located in a vertically running closing edge 44 of the side frame 1, 47 intervene. In the working position (FIG. 1), the displaceable frame 9 and 10 is secured against unintentional displacement by means of a mechanically acting locking device, designated overall by 48. The locking device 48 consists of a frame-mounted threaded bush, which forms a positive connection when the frame 9, 10 is closed with a threaded spindle mounted on the support. The threaded spindle is moved in the direction of the left frame part 1, 6 by means of a motor-driven threaded sleeve.

It is possible to change the printing plates on the forme cylinders 17 manually by an operator 49 while the printing unit is at a standstill (distance a between the left and right frames 1, 6; 9, 10).

Furthermore, it is possible to change the printing plates located on the forme cylinder 17 by means of a printing plate changing device, generally designated 51 and assigned to each printing unit 2 to 5 and 11 to 14. This pressure plate changing device 51 consists of two linear guides 52 (only one shown in FIG. 8) which are fixed to the frame at a distance of at least one forme cylinder width and on which both ends of a gripper bar 53 are guided. The gripper bar 53 extends in the axis-parallel direction to the forme cylinder 17 and carries a number of suction cups 54, by means of which a pressure plate 57 located in a waiting position on support rails 56 fixed to the frame on both sides (only one shown in FIG. 8) can be received and by means of movement of the gripper bar 53 on the linear guides 52 with its front edge 58 into a suspension slot 59 of the Forme cylinder 17 is hooked. The pressure plate 57 can either be clamped on both sides in suspension slots 59, 61 (known, for example, from DE P 42 44 077.7) or also on one side, as shown in FIG. 8, the pressure plate 57 then being shown in the outer surface of the forme cylinder by means not shown 17 built-in magnets is held. The linear guides 52 can be designed as threaded spindles on which the gripper bar 53 is moved by means of threaded sleeves which are rotated by an electric motor.

Control of the rotary movement of the forme cylinder 17 and synchronization of the printing plate insertion and extraction is known from DE 39 40 796 C2. Parallel to the support rails 56 and underneath them runs a support plate 62 which is fixed to the side frame and is wide in the form of a cylinder, for receiving printing plates (not shown) removed from the forme cylinder 17. Instead of the storage plate 62, frame-fixed support rails can also be used. The printing plate changing device is only indicated symbolically in FIGS. 1 and 2. Furthermore, there is the possibility of designing the spraying device 26 of the dampening unit 18 to be extractable for the purpose of better maintenance of both the dampening unit 18 and the forme cylinder 17. For this purpose, a parallel guide 63 is provided on each frame 1, 6 or frame 9, 10, which has stud bolts 64 which are positively attached on both sides of the housing of the spraying device and extend in the axis-parallel direction to the forme cylinder 17. The stud bolts 64 are each provided on the circumference with a one-sided flattening 66 to prevent rotation, which slides on a support surface 67 of the parallel guide 63, so that the spray device 26 can be pulled out by means of a handle 68. The spray device 26 can be locked in its working position (shown in FIG. 9) by the flattening

66 each stud 64 into one in the support surface

67 located recess 69 engages and each stud 64 is held in this working position by means of a clamping device 71 consisting of a rack and pinion drive. The rack, which can be moved by means of a pinion, presses against the stud 64. The spray device 26 is unlocked for the purpose of its removal by the rack of the clamping device 71 being retracted, so that the stud 64 is ejected from the recess 69 into the recess 69 by means of a spring-loaded ejector Level of the support surface 67 of the parallel guide 63 for removal can be raised (not shown in Figs. 1 and 2).

It goes without saying that, for. B. a second left frame part 6 and a second right sliding frame part 10 is required for the function of the printing unit, as well as second working cylinder for moving the frame 9, 10 and associated locking devices and the like. More.

The drive of the individual bridge printing units 2, 11; 3, 12; 4, 13; 5, 14 takes place via a standing shaft 73 vertically extending from the main drive shaft of the printing press of the forme cylinders 17 of the stationary printing units 2, 3, 4, 5 arranged one above the other in a vertical plane. Each printing unit 2, 3, 4, 5 is above the axle 74 of the in the frame 1, 6 mounted forme cylinder 17 by means of a z. B. electromagnetic clutch 76 separable from the standing shaft 73. The standing shaft 73 is formed at least in the region of the periphery of a ring gear 77 connected to each clutch 76 as a splined shaft, so that one of two pinions arranged on the standing shaft 73 in a form-fitting manner and belonging to the same ring gear 77 of each printing unit 2, 3, 4, 5 78-, 79 with the ring gear 77 is engaged. In FIG. 3, the ring gear 77 with the pinion 78 each form a pair of bevel gears that are in engagement with one another. When the direction of rotation of the forme cylinder 17 is desired, both are on the standing shaft 73 arranged pinions 78, 79 displaced in the vertical direction by means of a bow-shaped spacer 81, so that the pinion 79 alternatively comes into engagement with the ring gear 77. The respective spacer 81 can be actuated manually via a handle 82 or via known electrical, hydraulic or pneumatic actuating means. On the journal 74 of each forme cylinder 17, a spur gear 83 is also wedged, which per bridge pressure unit 2, 11; 3, 12; 4, 13 or 5, 14 also engages with the non-illustrated axle journals of the blanket cylinder 16 and the second forme cylinder 17, spur gears 84, 85, 86 which are positively connected (shown in FIG. 2 only for printing units 5 and 14). The spur gears 84, 85 only engage with one another when the printing press is in the working position.

It is also possible to arrange the standing shaft 73 in the vertical plane of the rubber blanket cylinders 16 of the stationary printing units 2, 3, 4 and 5 arranged one above the other.

The respective dampening unit 18 and the respective inking unit 19 can be driven both by friction with the forme cylinder 17 and by means of a motor-driven individual drive of the inking roller 22 and of the dampening agent application roller 27 or by means of known gearwheels. According to another exemplary embodiment of a drive for a bridge printing unit consisting of the printing units 5 and 14 (FIG. 4), there is a difference compared to the above-mentioned drive (FIG. 3) in that a coupling 89, 92 already exists between the forme cylinders 17 and the spur gears 86, 83 and a clutch 90, 91 is already arranged between the blanket cylinders 16 and the spur gears 85, 84. This has made it possible to decommission each of the cylinders 16, 17 individually, while it is only possible as a whole with the drive according to FIG. 3. Each bridge printing unit 2, 11; 3, 12; 4, 13 or 5, 14 can be equipped with this drive, so that, for. B. the forme cylinder 17 per bridge printing unit 5, 14 can be switched off (in Fig. 5, the forme cylinder 17 of the printing unit 14 is uncoupled), so that the respective uncoupled forme cylinder 17 can be provided with new printing plates during operation of the printing machine (imprinter). The blanket cylinder takes over

16 the function of an impression cylinder. In order to bring the forme cylinder 17 provided with new pressure plates back to the speed of the other cylinders, the journal of the forme cylinder 17 on the side of the second displaceable frame 10 is provided with an auxiliary drive motor 93 which, after the required speed has been reached, by means of a clutch 94 from the forme cylinder 17 is separable, the forme cylinder

17 of the printing unit 14 can be connected to the spur gear 86 again via the coupling 89 (FIG. 5). As well it is possible to alternatively uncouple the forme cylinder 17 of the printing unit 5 by means of a clutch 92 for the purpose of exchanging the printing plates. For the restart of this forme cylinder 17, an auxiliary drive motor 96 is then provided on the left frame 6, which can be separated from the forme cylinder 17 via a coupling 97. Furthermore, it is of course also possible to take the entire bridge pressure unit 5, 14 out of operation by loosening the couplings 89 to 92, e.g. B. for the purpose of cleaning and maintenance work. For this purpose, it is advantageous to also provide the blanket cylinders 16 of the printing units 14, 5 on the second side of the frame 9 and 1 with auxiliary drive motors 98, 99, in order to rotate the blanket cylinders 16, z. B. to change the rubber blanket. In this case too, the auxiliary drive motors 98, 99 can be separated from the blanket cylinders 16 by means of couplings 101, 102.

It is also possible, instead of the standing shaft 73, to have a separate drive motor 103 per bridge pressure unit 2, 11; 3, 12; 4, 13 or 5, 14 to provide (Fig. 6).

Finally, the blanket cylinders 16 and forme cylinders 17 of each bridge printing unit 2, 11; 3, 12; 4, 13 or 5, 14 can each be provided with separate drive motors 106, 107, 108, 109 which can be uncoupled (FIG. 7). The axes of rotation 111, 112 of blanket and forme cylinders 16, 17 of each printing unit 2 to 5 and 11 to 14 are each traversed by an imaginary straight line, which each represents a plane 114 or 110 and which each have an angle alpha in the range of zero is arranged up to ± 45 ° to a horizontal 113. An axis of rotation 116 of the ink roller 22 can also be included in this plane 114 (FIG. 10).

A height H of the printing unit according to the invention with four bridge printing units 2, 11; 3, 12; 4, 13 and 5, 14 can be between nine times and 17 times a diameter of a forme cylinder 17 (H = 4.5 x h), the diameter being based on the so-called "Berlin format". A height h of a printing unit 2, 3, 4, 5, 11, 12, 13 or 14 refers to twice to 3.75 times a forme cylinder 17 in the "Berlin format" (Fig. 12). The diameter of a forme cylinder 17 in the "Berlin format" is approximately 300 millimeters.

A known printing press, a so-called eight-high tower in H shape, is in? ± g. 11 (MAN-Roland) and consists of eight. Printing units, wherein two printing units are always combined in a U-shaped printing unit and are assembled in mirror image to one another to form an H printing unit. In type H - pressure unit on H - pressure unit the called aft tower formed.

In a further exemplary embodiment (FIG. 13), a printing unit 118 with a conventional inking unit 117 and a modified dampening unit 119 is shown, which can be used instead of the printing units 2 to 5 and 11 to 14 with the dampening units 18 and the short inking units 19. The conventional inking unit 118 can consist of an ink fountain 112 with an ink duct 122 and a film roller 123, to which two ink transfer rollers 124 are excluded, to which ink rubbing cylinders 126 are interposed. The latter of the two ink rubbing cylinders 126 is connected to the forme cylinder 17 via two ink application rollers 127 arranged parallel to one another. Said dampening unit 119 can consist of a spray dampening unit 128 with a dampening cylinder 129, the dampening cylinder 129 being connected via two dampening agent transfer rollers 133, 134 to a dampening unit application roller 132 which bears against the forme cylinder 17.

The printing unit according to the invention can be used in particular in the following printing processes: for conventional offset printing and for anilox offset printing, for indirect letterpress printing and for waterless offset printing. Parts list

1 frame part, fixed, left (87, 104)

2 printing unit, stationary (1)

3 printing unit, stationary (1)

4 printing unit, stationary (1)

5 printing unit, stationary (1)

6 frame part, fixed, left (88, 105)

7 rolls (9)

8 rolls (9)

9 frame part, movable, right (87, 104)

10 frame part, movable, right (88, 105)

11 printing unit, movable (9)

12 printing unit, movable (9)

13 printing unit, displaceable (9)

14 printing unit, movable (9)

15 -

16 blanket cylinders

17 forme cylinders

18 dampening system

19 inking unit

20 -

21 paint tray (19)

22 ink roller (19)

23 inking roller (19)

24 inking roller (19)

25 -

26 spray device (18) Dampening roller (18) paper web paper web - contact point (16, 16) contact point (16, 16) contact point (16, 16) contact point (16, 16) - working cylinder (9) working cylinder (9) guide bar (9) groove (1) - closing edge (9) pin (41, 9) pin (41, 9) closing edge (1) - blind hole (44, 1) blind hole (44, 1) locking device (1, 9; 6, 10) operator - pressure plate changing device linear guide (51) gripper bar (51) Suction cups (51) - 56 support rail (51)

57 pressure plate

58 folding (57)

59 suspension slot (17)

60 -

61 suspension slot (17)

62 storage tray

63 parallel guidance (26; 1; 26, 9)

64 stud bolts (26)

65 -

66 flattening (64)

67 contact surface (63)

68 handle

69 deepening (67)

70 -

71 clamping device (26)

72 ejector 73 standing shaft

74 stub axles (17)

75 -

76 clutch (73, 2, 11; 73, 3, 12; 73, 4, 13; 73, 5, 14)

^" 77 ring gear

78 sprockets

79 sprockets

80 -

81 spacer (78, 79)

82 handle

83 spur gear (17, 5) 84 spur gear (16, 5)

85 spur gear (16, 14)

86 spur gear (17, 14)

87 carriers, upper

88 carriers, upper

89 clutch (86, 17)

90 clutch (85, 16)

91 clutch (84, 16)

92 clutch (83, 17)

93 auxiliary drive motor (17, 14!

94 clutch (93)

95 -

96 auxiliary drive motor (17, 5)

97 clutch (96)

98 auxiliary drive motor

99 auxiliary drive motor

100 -

101 clutch

102 clutch

103 drive motor (5, 14)

104 beams, lower

105 carrier, lower iσ6 drive motor (17, 14)

107 drive motor (16, 14)

108 drive motor (16, 5)

109 drive motor (17, 5)

110 level

111 axis of rotation (16)

112 axis of rotation (17) 113 horizontal

114 level (16, 17)

115 -

116 axis of rotation (22)

117 inking unit

118 printing unit

119 dampening system

120 -

121 color box (118)

122 color tube (118)

123 film roller (118)

124 ink transfer roller (118)

125 -

126 I - friction cylinder (118)

127 inking roller (118)

128 spray dampening system (119)

129 dampening cylinder (119)

130 -

131 -

132 dampening roller (119)

133 dampening solution transfer roller (119)

134 dampening solution transfer roller (119)

H overall height, printing press

h Height, pressure unit

Alpha Angle (113, 114)

Claims

claims

1. Printing unit for multi-color perfecting for a web-fed rotary printing press, in which two printing units in a so-called bridge construction are designed as bridge units with two inking units, two forme cylinders and two blanket cylinders each, the blanket cylinders being directed towards one another and a plurality of bridge units being arranged one above the other, characterized in that the bridge units (2, 11; 3, 12; 4, 13; 5, 14) arranged one above the other can be separated into two parts (9; 1; 10), in a left frame part (1; 6) for receiving left printing units (2 to 5) ε as well as in a right frame part (9; 10) for receiving right printing units (11 to 14) that both frame parts (1, 6; 9; 10) can be brought into a horizontal distance (a) from each other .

2. Printing unit according to claim 1, characterized in that a frame part (1; 6) trägerfeεt (104; 105) is arranged.

3. Printing unit according to claim 1 and 2, characterized in that both frame parts (1, 6; 9, 10) is arranged lockable (48) in Betriebszuεtand.

4. Printing unit according to claim 1 biε 3, characterized in that daε inking unit (19) each Printing unit 2 to 5; 11 to 14) is designed as an anilox short inking unit (19).

5. Printing unit according to claim 4, characterized in that daε anilox short inking unit (19) at least auε an anilox roller (22) with an associated chamber doctor blade εowie at least one of the anilox roller (22) assigned inking roller (23; 24) ε and one under the anilox roller (22) arranged ink pan (21).

6. Printing unit according to claim 1 to 5, characterized in that each printing unit (2 to 5; 11 to 14) can be assigned a dampening unit (18).

7. Printing unit according to claim 6, characterized in that the dampening unit (18) consists of a moistening device (27) with an associated moistening device (26).

8. Printing unit according to claim 1, characterized in that each forme cylinder (17) of the printing unit (2 to 5; 11 to 14) is assigned a printing plate changing device (51).

9. Printing unit according to claim 8, characterized in that the printing plate changing device (51) two laterally fixed linear guides (52) for receiving an axially parallel to the forme cylinder (17) extending movable and suction (54) Including gripper bar (53) for the feed for printing plates (57).

10. Printing unit according to claim 1, characterized in that the forme cylinder (17) of each printing unit (2 to 5; 11 to 14) is arranged together with its inking unit (19) ε and dampening unit (18) ε separately.

11. Printing unit according to claim 10, characterized in that a spray device (26) of the dampening unit (18) by means of two seitengeεtellfeεter parallel guides

(63) is arranged to be separable from a dampening solution applicator roller (27).

12. Printing unit according to claim 1 to 11, characterized in that each printing unit (2 to 5; 11 to 14) has an overall height (h) which is between two and four times a diameter of a forme cylinder (17).

13. Printing unit according to Anεpruch 12, characterized in that the diameter of the forme cylinder (17) is based on a so-called "Berlin format".

14. Printing unit according to claim 1 biε 13, characterized in that at least one printing unit (11, 12, 13, 14) per bridge unit (2, 11; 3, 12; 4, 13; 5, 14) is designed to be horizontally displaceable.

15. Printing unit according to claim 1 and 6 to 14, characterized in that the inking unit (117) of each printing unit (2 to 5; 11 to 14) is designed as a conventional inking unit (117).

16. Printing unit according to claim 10, characterized in that between each cylinder (16; 17) and a drive (83 to 86; 73; 103; 106 to 109) of each printing unit (2 to 5; 11 to 14) a clutch (89 up to 92) is arranged.

17. Printing unit according to claim 10 and 16, characterized in that the drive (83 to 86) of each printing unit (2 to 5; 11 to 14) via a standing shaft (73).

18. Printing unit according to claim 10 and 16, characterized in that the drive (83 to 86) of each printing unit (2 to 5; 11 biε 14) via a main motor (103).

19. Printing unit according to claim 10 and 16, characterized in that the drive of each cylinder (16; 17) of each printing unit (2 to 5; 11 to 14) is formed as an individual drive (106 to 109).

20. Printing unit according to claim 10 and 16 to 18, characterized in that the cylinders (16; 17) each Printing unit (2 to 5; 11 to 14) are additionally connected to a detachable auxiliary drive motor (93; 96; 98; 99).

21. Printing unit according to claim 1 to 20, characterized in that the axes of rotation 111, 112 of the blanket and the forme cylinder (16, 17) of each printing unit (2 to 5; 11 to 14) are arranged in one plane (110; 114) , which runs at an angle (± alpha) to a horizontal (113).

22. Printing unit according to claim 21, characterized in that the angle (alpha) is in the range from zero to 45 °.

23. Printing unit according to claims 1 and 6 to 22, characterized in that the inking unit (118) of each printing unit (117) is designed as a conventional inking unit (118).

24. Printing unit according to claim 1 to 23, characterized in that in each side frame (1, 6) a on rollers (7; 8) verεschiebbaren frame (9; 10) is arranged, which the printing units to be moved (11, 12, 13th , 14) records.