EP0835180A2

EP0835180A2 - Sheet-fed, offset rotary press

Info

Publication number: EP0835180A2
Application number: EP96918598A
Authority: EP
Inventors: Hans-Bernhard BOLZA-SCHÜNEMANN
Original assignee: Koenig and Bauer Albert AG
Current assignee: Koenig and Bauer AG
Priority date: 1995-06-30
Filing date: 1996-06-22
Publication date: 1998-04-15
Anticipated expiration: 2016-06-22
Also published as: BR9609626A; DE59603986D1; US6050188A; WO1997002143A2; CN1190933A; JP3428959B2; EP0899096A1; DE59608860D1; EP0899095A1; EP0835180B1; WO1997002143A3; EP0899095B1; JP3330131B2; JPH10510490A; DE59608167D1; CN1077039C; EP0899096B1; JP2001171074A; JP3266270B2; DE19523378A1

Abstract

The object of the invention is to avoid registration problems in a high quality sheet-fed, offset rotary press for colour printing with a minimum size. For that purpose, the rotary press has two printing and blanket cylinders with at least two printing surfaces each that co-operate with a central printing cylinder that has one printing surface more than the printing cylinders, and the sheets are only removed from the printing cylinder after printing is finished.

Description

Bogenof f set rotat i onsdruc kmaschine

The invention relates to a

Bogenof f set rotat i onsdruc kmasch i ne according to the preamble of claims 1, 16 and 23.

From DE-PS 435 592 a three-cylinder rotary rotary printing machine is known, in which plate and rubber cylinders have at least two printing surfaces each and one printing cylinder has one printing surface more than that Rubber cylinder indians.

Nachtei lig on this printing press is that registration problems can occur, since a sheet to be printed is already removed from the printing cylinder by a gripper system before this sheet is completely printed.

The invention has for its object to provide a Bogenrotat i onsoff setdruc kmaschi ne.

This object is achieved by a

Bogenof f set rotat i onsdruc kmaschi ne solved with the features of the characterizing part of claims 1, 16 and 23.

In an advantageous manner, by the invention Sheetfed offset rotary printing press achieves multi-color printing with a register of the highest accuracy, since the sheets to be printed are held on a printing cylinder in a single gripper system during all printing processes. The printed sheets are only taken over by another gripper system and removed from the printing cylinder after the sheet has been completely printed.

By using a sheet feeder synchronized with the impression cylinder, the sheets to be fed are opened from the stand

Accelerated circumferential speed of the printing cylinder, a safe sheet feed with a very precise feed register is achieved even at high speeds (e.g. 12,000 sheets per hour). Of particular advantage is that the forme cylinders are assigned laser writing systems and thus rbebi ide rable plates are imaged directly in the printing press (computer-to-press). This means that there are no registration problems due to the plate mounting on the forme cylinder or due to errors during the production of the plates. This means that circumferential, side or inclined registers are not necessary.

The short inking units without ink zones minimize makeready times and simplify operation of the printing press. In particular, the short inking units enable a very small overall size of the entire printing press. The short inking units are only with each a printing surface of the forme cylinder in contact, so that in the parked state there is a multiple rollover only against an anilox roller. An existing color relief in the circumferential direction is reduced by different diameters of applicator roller and anilox roller. The anilox roller interacts with a chambered doctor blade, which completely removes the remains of the color relief and creates a completely uniform ink film on the anilox roller.

Damping units are omitted when using plates suitable for dry offset, so that known problems caused by dampening solutions, such as emulsification or reinforced stencils, cannot arise.

The investment pile and delivery pile are on one side, which improves usability. In addition, the side to be printed of the sheets to be fed is at the bottom, while the printed side is at the top of the discharged sheets of the delivery stack. As a result, it is not necessary to turn the stacks after the straight printing in order to reprint the sheets.

The sheetfed offset rotary printing press according to the invention is compact, minimizes makeready times, simplifies operation and nevertheless guarantees multi-colored, stencil-free quality prints with excellent registers. This makes it suitable

Sheetfed offset printing presses especially for short runs in a range from 100 to 20,000 sheets. In addition, at least double inking of the inking roller is achieved in that the circumferential length of the printing surface to be inked is less than or equal to a circumferential length of the associated inking roller.

The sheetfed rotary printing press according to the invention is shown in the drawing and is described in more detail below.

Show it

Fig. 1 is a schematic side view of the Bogenoff set rotat i onsdruckmaschi ne;

Fig. 2 is a schematic representation of a cam gear for controlling inking rollers.

A shed feeder 1 is connected upstream of a sheet-fed machine 2 to a sheet-fed offset rotary printing machine. This sheet system 2 is mounted in side frames 3, 4 of the sheetfed offset rotary printing machine and essentially consists of a side alignment device, for example a suction mark 6, a sheet feeder device 7 and front marks 8, 9. For example, the sheet feeder nri Attention 7 executed as a rotating stop drum 7 with the circumference two gripper systems 12, 13 offset by 180 ° and extending in the direction of an axis of rotation 11 of the stop drum 7 are provided. In the area of these gripper systems 12, 13 a row, ie at least two, front marks 8, 9 are arranged. The stop drum 7 is driven, for example, synchronized to the machine cycle by means of a non-actuated electronic ro ri ebes, which accelerates the stop drum 7 from 180 degrees to the circumferential speed of a printing cylinder 14 within 180 ° and then up to brakes to the stand. The sheet feed device 7 can also be designed as an oscillator or suction drum or can also work in several stages from combinations of suction drum and stop drum or oscillator and is arranged below the sheet to be fed.

The central pressure cylinder 14 with a diameter d14, z. B. d14 = 396 mm, which corresponds to a triple nominal diameter dn = 132 mm, is provided with three jewei ls offset by 120 °, extending parallel to its axis of rotation 16 gripper systems 17, 18, 19. These controllable gripper systems 17, 18, 19, which interact with gripper supports 103, 104, 106, are actuated to open and close by means of cam rollers which interact with variable control cams. With this pressure cylinder 14 act two double nominal diameter dn rubber zy li nde r 21, 22 with a diameter d21 or d22, z. B. d21 = 264 mm or d22 = 264 mm together, each of which has two equally large, opposite pressure surfaces 23, 24 and 26, 27. The respective rubber cylinder 21, 22 can be fitted with two rubber blankets 28, 29 or 31, 32 corresponding to the associated printing surfaces 23, 24 or 26, 27 or with a single one, the two printing surfaces 23, 24 or 26 , 27 corresponding blanket. Corresponding forme cylinders 33, 34 are assigned to these rubber cylinders 21, 22. The double-sized Formzyljnder 33, 34 with a diameter d33 and d34, z. B. d33 = 264 mm or d34 = 264 mm, also have two of the pressure surfaces 23, 24 and 26, 27 of the rubber cylinder 21, 22 associated pressure surfaces 36, 37 and 38, 39 respectively. These printing surfaces 36, 37 and 38, 39 are formed, for example, by printing plate-bearing plates 41, 42 and 43, 44, each of these printing surfaces 36, 37 and 38, 39 of the forme cylinders 33, 34 having its own plate 41, 42 or 43, 44 or both printing surfaces 36, 37 or 38, 39 can be provided with a common plate which then carries two printing forms. Special plates 41, 42, 43, 44 suitable for waterless offset printing are preferably used, so that dampening units can be dispensed with. The sheetfed set rotati onsmaschi ne described works with planographic printing plates. But it is also possible to use high pressure plates (letterset). With direct high pressure, the rubber cylinders 21, 22 can be omitted. Each forme cylinder 33, 34 has its own laser writing system 46, 47 for direct imaging suitable plates 41, 42, 43, 44 assigned. This

Plates 41, 42, 43, 44 are located in front of the image on the forme cylinders 33, 34 and can

Forme cylinders 33, 34 are fed individually. But it is also possible to use the forme cylinder 33, 34

To provide cavity and there storage and

Arrange the receptacle l of a film which can be written on by a laser.

Rubber and forme cylinders 21, 22 and 33, 34 can each be equipped with more than two printing surfaces. The printing cylinder 14 then z. B. a

Gripper system carries more or less than the number of

Printing areas of a forme cylinder 33, 34. The number of

Gripper systems 17, 18, 19 of the printing cylinder 14 is not equal to the number of printing surfaces 36, 37 of the

Form cylinder 33.

The two laser writing systems 46, 47 are in the

From exemplary embodiments together on an axis extending parallel to the axis of rotation 16 of the pressure cylinder 14

Traverse 48 stored. For example, a large number of independent laser diodes are located at a fixed location and are each with one end

Optical fiber connected. The other ends of the

Light guides are arranged closely next to one another on a slide, a large number (for example 64) of the light guides being aligned with each forme cylinder 33, 34. The carriage is parallel to the longitudinal direction of the

Forme cylinders 33, 34 can be moved axially on the crossmember 48. The two forme cylinders 33, 34 can be illustrated at the same time. It is also possible to dispense with the axially movable carriage and to arrange the light guide in a stationary manner, aligned with the respective forme cylinder 33, 34, in which case a number of light guides corresponding to the desired resolution of the pressure image is provided over an entire length of the forme cylinder 33, 34 is.

A single imaging system can also be arranged, which can optionally be assigned to both forme cylinders 33, 34, for example by means of a pivoting device, or the beams of which are deflected in such a way that both forme cylinders 33, 34 can be imaged.

Each of the printing surfaces 36, 37, 38, 39 of the two forme cylinders 33, 34 is provided with its own inking unit 49,

51, 52, 53 colored. The inking units 49, 51,

52, 53 on the forme cylinders 33, 34 alternately on and off, so that only the associated printing surface 36, 37, 38, 39 is colored. In the present exemplary embodiment, the inking units 49, 51, 52, 53 are designed as short inking units 49, 51, 52, 53. These short inking units 49, 51, 52, 53 essentially each consist of an inking roller 54, 56, 57, 58 inking the printing surface 36, 37, 38, 39, a driven anilox roller 59, 61, 62, 63 a chambered doctor blade 64, 66, 67, 68 and a collecting trough 69. The respective inking roller 54, 56, 57, 58 can also be designed to be driven, one with the Anilox roller 59, 61, 62, 63 common drive or its own independent, for example controllable drive can be provided. A diameter d54, d56, d57, d58, e.g. B. = 123 mm, the inking rollers 54, 56, 57, 58 is of a diameter d59, d61, d62, d63, z. B. = 117 mm, the anilox rollers 59, 61, 62, 63 different. Thus, a circumferential length of the printing surface 36, 37, 38, 39 to be inked is less than or equal to the circumferential length of the associated inking roller 54, 56, 57, 58. The chamber doctor blade 64, 66, 67, 68, which has a working and closing doctor blade 71, 72, leads the Anilox roller 59, 61, 62, 63 printing ink, which is metered by means of the rake lblattes 71, excess ink that has been scraped off by the anilox roller 59, 61, 62, 63 by means of the respective optical rake Iblatt 72 is removed from the collecting tray 69 recorded and returned to a color cycle. Anilox roller 59, 61, 62, 63 and rubberized inking roller 54, 56, 57, 58 are in constant contact with one another, while the inking roller 54, 56, 57, 58 synchronizes with the respective forme cylinder 33, 34 on the associated printing surface 36, 37, 38, 39 is adjustable. For this purpose, the inking roller 54, 56, 57, 58 is mounted on both sides in single-arm levers 72, 73, 74, 76 which can be pivoted about the anilox roller 59, 61, 62, 63. These levers 72, 73, 74, 76 can be mechanically, e.g. B. by means of a cam gear, or electrically, for. B. actuated by means of a pressurizable working cylinder 78, 79, 81, 82 interacting solenoid valve l become. Instead of the short inking units 49, 51, 52, 53 described, conventional inking units provided with ink fountain and zone screws can also be used. The inking rollers are in constant contact with the other inking rollers of the conventional inking unit and from the respective forme cylinder 33, 34, only the respective associated printing surface 36, 37, 38, 39 inking, can be turned on and off. In the product direction, a sprocket shaft 84 having sprockets 83, which cooperates with the pressure cylinder 14, is arranged after the two rubber zy t, ends 21, 22. A length l, e.g. B. 414 mm, one of two centers 85, 90 of the rubber cylinder 22 and pressure cylinder 14 or sprocket shaft 8 and pressure cylinder 14 limited circular arc 95 on the outer surface of the pressure cylinder 14 is greater than a length, for. B. 360 mm, the sheet at the maximum format allowed for this machine. One of the centers 90 of the pressure cylinder 14 and the sprocket shaft 84 and of the centers 100 of the Druckzy Li nders 14 and the stop drum 7 included angle Alpha, z. B. Alpha = 60 °, is smaller than an angle Beta, e.g. B. Beta = 120 °, which is formed by two successive gripper systems 17, 18. The sprocket shaft 84 carries a chain 86 of a chain gripper feraus Legers 87. This chain 86 is z. B. four Kettengre i fersystemen 88, 89, 91, 92 equipped, with a distance a, z. B. 829 mm, two Kettengrei fersysteme 88, 89, 91, 92 to each other with a stretched chain 86 a circumferential length of a rubber or plate cylinder 21, 22 or 33, 34 corresponds. This endless chain 86 designed in this way is deflected by a second sprocket shaft 93 and runs back to the pressure cylinder 14. This distance a can also be made smaller if the chain is non-uniform, for. B. slowed to the sheet deposit to run t.

The operation of the sheetfed offset printing machine according to the invention is as follows: the scale feeder 1 separates sheets from a stack 94 and feeds them to the stationary stop drum 7 via a suction belt table 96. There, a front edge of a first sheet 97 applied is aligned on the front marks 8 parallel to the axis of rotation 11 of the stop drum 7. Then the suction mark 6 detects the sheet 97 and aligns it laterally. After aligning the sheet 97, the gripping system 12 of the stop drum 7 closes and the stop drum 7 accelerates the sheet 97 from the stationary position to the peripheral speed of the printing cylinder 14. After reaching the peripheral speed, the gripper system 12 of the stop drum 7 transfers the sheet 97 to the first gripper system 17 of the printing cylinder 14. This conveys the sheet 97 to the first rubber cylinder 21 and the sheet 97 is printed by the printing surface 23 of the rubber cylinder 21. Before that, the plate 41 of the forme cylinder 33 inked by the inking unit 49, for example with black printing ink, has its printing image on the Pressure surface 23 of the rubber cylinder 21 transferred. The sheet 97 thus provided with a first printing image and the sheet 97 held by the gripper system 17 are transported to the second rubber cylinder 22. There, the sheet 97 is printed with the second printing image from the printing surface 26 previously provided by means of the inking unit 52 and the plate 43 of the second forme cylinder 34 with a second printing image (for example in the printing ink “cyan”).

Meanwhile, the second gripper system 18 of the printing cylinder 14 passed the stop drum 7 without picking up a sheet.

The third gripper system 19 now takes over a second sheet 98 from the second gripper system 13 of the stop drum 7, which was fed and aligned in the same way as the first sheet 97 of the stop drum 7. This sheet 98 is also first printed by the printing surface 23 of the first rubber cylinder 21 bearing the printing image of the plate 41 and then by the printing surface 26 of the second rubber cylinder 22 supporting the printing image of the plate 43.

In the meantime, the first sheet 97 was conveyed past the sprocket shaft 84 and the stop drum 7 without opening the gripper system 17. The sheet 97 now reaches the rubber cylinders 21 and 22 for the second time. However, on the first rubber cylinder 21, the sheet 97 is now printed by the second printing surface 24 with the third printing image, which is printed, for example, with the printing ink "magenta" plate 42 colored by the inking unit 51 was transferred to the printing surface 24. The fourth printed image was transferred from the plate 44, which was inked, for example, with yellow printing ink by means of the inking unit 53, to the second printing surface 27 of the second rubber cylinder 22. This printing area 44 prints the sheet 97 with the fourth printing image.

The second gripper system 18 in the meantime took over a third from the first gripper system 12 of the stop drum 7, sheet 99, which now, like the first and second sheets 97, 98, for the first time from the pressure surfaces 23 and 26 of the rubber cylinders 21 and 22 is printed. The fully printed, provided with four Druckbi ldern first sheet 97 is after the end of the fourth printing process even at maximum format length, eg. B. 360 mm, taken from the Kettengre i fe rsystem 91 in the region of the sprocket shaft 84. Here, the gripper system 17 opens for the first time after the takeover of the unprinted sheet 97 from the first gripper system 12 of the stop drum 7, the sheet 97 has thus been printed in a gripper with four printing images. This chain gripping system 91 transports the sheet 97 in the chain gripping device 87 to the area of a stack 101. There, the chain gripping system 91 opens and the sheet 97 is placed on the stack 101. The now empty gripper system 17 then takes over a fourth sheet 102 from the gripper system 12 of the stop drum 7. The second gripper system 18 transports the third, with two printing media printed sheets 99 past the sprocket shaft 84, while the second sheet 98, which is now provided with four printing media, is transferred to the chain gripping system 92 and transported to the stack 101.

These described processes are repeated periodically, so that each revolution of the forme cylinders 33, 34 or the rubber cylinders 21, 22, respectively, a sheet printed with four printing images comes out to the chain grip 87 and there on the stack 101 is filed.

The above-mentioned cam gear 75 for starting and stopping the inking rollers 54, 56, 57, 58 can on each side, for example, essentially consist of a pair of cam disks 106, 107 and two cam rollers 108, 109 interacting with them and are exemplified using one Cam gear 75 of the forme cylinder 33 described. The cams 106, 107 are rigidly attached to a pin 111 of the respective associated forme cylinder 33 and rotate with it. A circumferential surface of each cam plate 106, 107 is in the circumferential direction with a circular arc-shaped depression 112, 113 adapted to the associated pressure surface 36, 37 and an opposite, circular arc-shaped elevation 114, 116, which curve by means of a gentle transition lying in the region of a channel of the forme cylinder 33 are connected. The cam rollers 108, 109 are, for example, on a pin 117 or 118 of the inking roller 54 or 56 rotatably mounted. The cam rollers 108, 109 of both inking rollers 54, 56, which cooperate in a spring-loaded manner with a forme cylinder 33, are offset from one another in the axial direction, so that each cam roller 108, 109 is assigned a cam plate 106, 107. Due to the rotation of the cam disks 106, 107 with the forme cylinder 33, the elevation 114, 116 and the depression 112, 113 of the respective cam disk 106, 107 alternately act in such a way that during the coincidence of the depression 112, 113 with the cam roller 108, 109 starting and during the interaction of the elevation 114, 116 with the cam roller 108, 109 the inking roller 54, 56 is lifted off the forme cylinder 33.

Reference list

1 scale feeder

2 bow system

3 Side frame 4 Side gesture 11 5 6 Suction cylinder 7 Sheet feed device, stop drum 8 Front stamp 9 Front stamp 10 11 Rotation axis (7)

12 gripper system (7)

13 gripper system (7)

14 D ruekzy li nde r

15 -

16 axis of rotation

17 gripper system (14)

18 gripper system (14)

19 gripper system (14)

20 -

21 rubber cylinder

22 rubber cylinder

23 printing surface (21)

24 printing area (21)

25 -

26 printing area (22)

27 printing area (22) Rubber cloth (21) rubber cloth (21)

Rubber blanket (22) Rubber blanket (22) Fo rm cylinder Form cylinder

D rue kf pool (33)

Printing area (33)

Printing area (34)

Plate (33)

Plate (34)

Laser writing system Laser writing system Traverse Fa rbwe rk

Fa rbwe rk Fa rbwe rk Fa rbwe rk Fa rbüpf ragwa Ize

Fa rbwa ragwa Ize Color ragwa Ize Fa rbwa rze Ize Rwa rwa Ize

Rasterwa Ize Raste rwa Ize Raste rwa Ize Kamme rrake l

Kamme rrake l Kammerrake l Kamme rrake l On catch pan

Working tsrake oil sheet

See the leaflet leaf

lever

Nockenget ri ebe

lever

Work at the end

Workers workers Workers sprocket Sprocket wheel center (22; 14) 86 chain

87 chain chain out

88 chain grip system

89 chain gripper system

90 headquarters (84; 94)

91 chain gripper system

92 chain gripper system

93 sprocket shaft, second

94 stacks (1)

95 arcs (14)

96 suction belt table

97 sheets, first

98 sheets, second

99 sheets, third

100 headquarters (7; 14)

101 stacks (87)

102 sheets, fourth

103 gripper pad (14)

104 gripper pad (14)

105 gripper pad (14)

106 cam (75)

107 cam (75)

108 cam roller (75)

109 cam roller (75)

110 -

111 cones (33)

112 deepening (106)

113 recess (107)

114 increase (106) 115 -

116 increase (107)

117 cones (54)

118 cones (56)

a Distance between chain gripper systems (88; 89; 91; 92)

d14 diameter of the impression cylinder (14) d21 diameter of the rubber cylinder (21) d22 diameter of the rubber cylinder (22) d33 diameter of the forme cylinder (33) d34 diameter of the forme cylinder (34) d54 diameter of the inking roller (54) d56 diameter of the Inking roller (56) d57 diameter of the inking roller (57) d58 diameter of the inking roller (58) d59 diameter of the anilox roller (59) d61 diameter of the detent rwa Ize (61) d62 diameter of the detent rwa Ize (62) d63 diameter of the anilox roller (63)

l length of arc (95)

Alpha angle between the centers (90; 100)

Beta angle between two gripper systems (17; 18)

Claims

Expectations

1. Sheetfed rotary printing machine for multi-color printing consisting of forme cylinder (33), rubber cylinder (21) and a central printing cylinder (17; 18; 19) provided with a number of controlled gripper systems (17; 18; 19) 14), the forme cylinder (33) and rubber cylinder (21) having the same diameter (d33 or d21) and each having at least two pressure surfaces (23; 24 or 36; 37) and the number of gripper systems (17; 18; 19) of the printing cylinder (14) is not equal to the number of printing areas (36; 37) of the forme cylinder (33) and wherein a stack (94) of sheets to be fed (97; 98; 99) and a stack (101) of discharged ones Sheets (97; 98; 99) are arranged on one side of the sheet offset printing press mechanism, characterized in that the printing cylinder (14) has at least a second one consisting of a forme cylinder (34) and a rubber cylinder (22) A pair of cylinders is assigned and that the pressure cylinder (14) has a bogenabführ-based gripper system (88; 89; 91; 92) d is so assigned that an arc (97; 98; 99) with maximum format length is only taken over by this gripper system (88; 89; 91; 92) after a printing process between blanket cylinder (22) and printing cylinder (14).

2. Bogenoff set rotat i onsdruc kmaschi ne according to claim 1, characterized in that on the forme cylinder (33; 34) laser-inscribable plates (41; 42; 43; 44) are arranged.

3. sheet offset rotat i onsdruc kmaschi ne according to claims 1 and 2, characterized in that each forme cylinder (33; 34) is assigned its own laser writing system (46; 47).

4. sheet offset rotat i onsmaschi ne according to claims 1 and 2, characterized in that a single laser writing system (46; 47) is provided for optional Bebi change of both forme cylinders (33; 34).

5. sheet offset rotat i onsmaschi ne according to claims 1 to 4, characterized in that the laser writing system (46; 47) is arranged axially movable parallel to its associated forme cylinder (33; 34).

6. sheet offset rotat i onsmaschi ne according to claims 1 to 4, characterized in that the laser writing system (46; 47) is arranged stationary in the axial direction and is provided with such a plurality of lasers that the respective associated forme cylinder ( 33; 34) is simultaneously imaged along its entire length.

7. sheet offset rotat i onsdruc kmasch i ne according to claim 1, characterized in that the central printing cylinder (14) is associated with a sheet feed rei nri direction (7) that this sheet feed i nri c tion (7) can be driven such that only every second, controllable gripper system (17; 18; 19) of the printing cylinder (14) is supplied with a sheet (97; 98; 99; 102) and the sheets (97; 98; 99; 102) to be fed from the stage in one stage or be accelerated in several stages to the peripheral speed of the printing cylinder (14).

8. Bogenof f set rotat i onsdruc kmasch i ne according to claim 7, characterized in that this Bogenzuuführei nri device (7) is designed as a stop drum (7).

9. Bogenof fset rotat i onsdruc kmasch i ne according to claim 8, characterized in that the stop drum (7) is provided on the circumference with two 180 ° offset gripper systems (12; 13).

10. Bogenof fset rotat i onsdruckmas chi ne according to claim 7, characterized in that for driving this sheet feeder nri device (7) a separate electric drive is provided.

11. Bogenof fset rotati onsdruckmaschi ne according to claims 1 to 6, characterized in that central units (90; 100) of the discharging sprocket shaft (84) and feeding sheet feed device (7) enclose an angle (alpha) and that this angle (alpha) is smaller than an angle (beta) enclosed by two successive gripper systems (17; 18).

12. sheetfed set rotat i onsdruc kmaschi ne according to claim 1, characterized in that inking rollers of a conventional, with ink fountain and zone screws verseheqen inking unit in constant contact with the other inking rollers and alternately from the forme cylinder (33; 34) on and off, only the respective associated printing surface (36; 37; 38; 39) are arranged inking.

13. Bogenof fset rotat i onsdruc kmaschi ne according to claim 1, characterized in that each forme cylinder (33; 34) is assigned at least one short inking unit (49; 51; 52; 53) and that the short inking unit (49; 51; 52; 53 ) each has a chambered doctor blade (64; 66; 67; 68), an anilox roller (59; 61; 62; 63) and at least one inking roller (54; 56; 57; 58).

14. sheet offset rotat i onsdruc kmaschi ne according to claim 1, characterized in that each printing surface (36; 37; 38; 39) of the forme cylinder (33; 34) is assigned its own short inking unit (49; 51; 52; 53).

15. sheet offset rotat onsdruc kmas chi ne according to claim 1, characterized in that the inking roller (54; 56; 57; 58) in constant contact with the associated anilox roller (61; 62; 63; 64) and alternately by the forme cylinder ( 33; 34) can be switched on and off, only the respective associated printing surface (36; 37; 38; 39) is arranged to be colored.

16. sheet rotary printing machine for multi-color printing, consisting of a central printing cylinder (14) provided with controllable gripper systems (17; 18; 19) and a number assigned to the printing cylinder (14), each with at least two printing surfaces (36; 37 ; 38; 39) provided forme cylinders (21; 22; 33; 34), characterized in that each printing surface (36; 37; 38; 39) is assigned at least one short inking unit (49; 51; 52; 53) and that the short inking unit (49; 51; 52; 53) each has a chambered doctor blade (64; 66; 67; 68), an anilox roller (59; 61; 62; 63) and at least one inking roller (54; 56; 57; 58).

17. Bogenrotat i onsdruc kmaschi ne according to claim 16, characterized in that the inking roller (54; 56; 57; 58) in constant contact with the associated anilox roller (61; 62; 63; 64) and alternately by the forme cylinder (33; 34) can be switched on and off, only the respective assigned printing surface (36; 37; 38; 39) is colored.

18. Bogenrotat i onsdruc kmas c h i ne according to claim 16, characterized in that a circumferential length of the printing surface to be inked (36; 37; 38; 39) is less than or equal to a circumferential length of the associated inking roller (54; 56; 57; 58).

19. Bogenrotat i onsdruc kmas c h i ne according to claim 16, characterized in that the short inking unit has only a single inking roller (54; 56; 57; 58).

20. Bogenrotat i onsdruc kmas c hi ne according to claim 19, characterized in that this inking roller (54; 56; 57; 58) directly with the anilox roller (59; 61; 62; 63) and the associated printing surface (36; 37; 38; 39) is arranged to cooperate.

21. Bogenrotat i onsdruc kmas c hi ne according to claims 12, 15 or 18, characterized in that at least one cam gear (75) for alternately turning on and off the inking roller (54; 56; 57; 58) from the Formzylin¬ der (33; 34) is provided.

22. Bogenrotat ionsdruckmaschi ne according to claim 21, da¬ characterized in that as cam gear (75) essentially two with the forme cylinder (33; 34) revolving, provided with elevations (114; 116) and depressions (112; 113) Cam disks (106; 107) and two interacting with the respective cam disks (106; 107) and inking rollers (54; 56; 57; 58) Cam rollers (108; 109) are provided.

23. Bogenrotat i onsdruckmaschi ne according to claims 12, 15 or 17, characterized in that the pressure medium can be acted upon by working cylinders (78; 79; 81; 82) for alternately turning the inking roller (54; 56; 57; 58) on the forme cylinder (33; 34) is provided.

24. Bogenrotat i onsdruckmaschi ne according to claims 12, 15 or 17, characterized in that the respective inking roller (54; 56; 57; 58) in about the associated screen roller (61; 62; 63; 64) pivotable levers (73 ; 74; 76; 77) is arranged mounted.

25. sheet rotary printing machine for direct multi-color printing, comprising a forme cylinder (33) and a central printing cylinder (14) provided with a plurality of controlled gripper systems (17; 18; 19), the forme cylinder (33) having at least two printing surfaces (36 ; 37) and the number of gripper systems (17; 18; 19) of the printing cylinder (14) is not equal to the number of printing surfaces (36; 37) of the forme cylinder (33) and a stack (94) of sheets (97; 98; 99) and a stack (101) of discharged sheets (97; 98; 99) are arranged on one side of the sheet-fed rotary printing press, characterized in that at least one second forme cylinder (34) is assigned to the printing cylinder and that the printing cylinder (14) a sheet-removing gripper system (88; 89; 91; 92) is assigned in such a way that a sheet (97; 98; 99) with maximum format length only after a printing process between the forme cylinder (34) and impression cylinder (14) of this gripper system (88; 89 ; 91; 92) is taken over.