CA2130063C

CA2130063C - Printing machine with at least one interchangeable cylinder

Info

Publication number: CA2130063C
Application number: CA002130063A
Authority: CA
Inventors: Josef Schneider; Josef Gottling
Original assignee: MAN Roland Druckmaschinen AG
Current assignee: Manroland AG
Priority date: 1993-08-20
Filing date: 1994-08-12
Publication date: 2001-01-02
Anticipated expiration: 2014-08-12
Also published as: DE9421819U1; CA2130063A1; JP2825444B2; DE59409588D1; EP0788880B1; DE59403944D1; EP0639452A1; EP0639452B1; DE4328058A1; EP0788880A1; JPH0776063A

Abstract

A printing machine has first cylinders and first rollers or a first plate cylinder which carries a typeform installed in the printing machine in a mounting from which they can be removed and which are interchangeable for second cylinders or rollers or a second plate cylinder also carrying a typeform. The first cylinders or rollers, or the first plate cylinder carrying the typeform have fixed set interfaces for their correct side registry and circumferential registry in the printing machine which includes an exchange unit with a first gripper and cylinder exchange device. The first gripper takes the first cylinder or the first roller or the first plate cylinder together with the typeform out of their respective mounting and places the cylinder, roller or first plate cylinder into the cylinder exchange device, removes from the cylinder exchange device a second cylinder, second roller or second plate cylinder with associated typeform and again places the second cylinder, second roller and second plate cylinder with its typeform correspondingly into their respective mounting in the printing machine.

Description

r. . ~, n ~i~~~b BACKGROUND OF THE INVENTION
In known flatbed printing machines, especially offset printing machines, it is necessary, when the image to be printed is changed, to change the typeforms.
To do this, the entire printing machine must be stopped; the exchange of typeforms is generally done manually.
However, automatic converting systems (robotics) are also known. In forms-printing machines, cylinders are exchanged manually, in part. In intaglio printing machines, the exchange of cylinders using cranes is a common procedure.
A printing machine is known from U.S. Pat. No. 5, 186, 103 which is used in particular for printing on a paper web of heavy or thick stock material and which has interchangeable cylinders. Because, in keeping with the various packaging materials to be printed on, the images to be printed are of various widths and lengths, it is necessary to use and exchange plate cylinders of various diameters. Either the plate cylinder alone (in direct printing) or the plate cylinder together with the blanket cylinder (in offset printing) is located in an interchangeable cassette, which can be removed from the printing tower in question of the printing machine. A hoist, which is attached movably to a rail, is used to remove the cassette.
The hoist first draws the cassette upward and then transports it away, in order to exchange it for ~ f - ~ 1 .
~~~~~~J

SUMMARY OF THE INVENTION
.:, An object of the present invention is therefore to provide a printing machine in which any desired cylinder or any desired roller can be easily changed, so that easy cleaning, as well as flexible exchange between printing jobs that require different rollers or cylinders; is ' possible.
This object is attained by an embodiment of the apparatus of the present invention which is a printing apparatus having a mounting disposed within the printing machine. A first cylinder is positionable within the mounting. The first cylinder has a fixed interface for establishing at least one of side and circumferential registration between the first cylinder and the mounting. A second cylinder is provided and also positionable within the mounting.
Similarly, the second cylinder has a fixed interface fox establishing at least one of side and circumferential registration between the second cylinder and the mounting. A
cylinder exchanging assembly is provided for removing the first cylinder from the mounting. The cylinder exchanging assembly includes a gripper assembly and a cylinder exchange device for holding the second cylinder. The gripper is operable to exchange the first cylinder for the second cylinder in the mounting and to place the first cylinder in the cylinder exchange device, thereby exchanging the first cylinder and the second cylinder.
It is also, the obaect pf the ~prpsent inventiQ,~ to create a ~pri~tin~;
machine ~n which ~, the plate cylinder together with the typeforn can be changed quickly and fully automatically.
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This object is attained by a further embodiment of the present invention in which the first cylinder is a first plate cylinder having a removable first typeform on an outward surface thereof and in which the second cylinder is a second plate cylinder having a removable second typeform.
Other objects will be evident from embodiments of the apparatus of the present invention in which multiple printing units share a cylinder exchanging assembly.
It is particularly advantageous that after the used plate cylinder with the used typeform has been changed, the used plate cylinder can be renewed while printing is carried out with the newly substituted plate cylinder. This can be done by having, for example, the plate ;r ,~
PB 3751 , the plate cylinder itself. In order to install the plate cylinder correctly in the printing machine in respect to circumference and side register, there are, for example, movable bearing sleeves , for the plate cylinder in the side walls in the direction of the longitudinal axis of the plate cylinder, plate cylinder clamping mechanisms, and serrations between the cylinder mounting and the plate cylinder. The distribution magazine which is used for the exchange of the plate cylinders preferably has a drum storage device, in which one or more plate cylinders are stored for exchange. The gripping, turning and lifting elements with which the plate cylinder is taken out of the printing machine and exchanged for another plate cylinder are preferably constructed in the manner of equipment of the type used in machine tools, e.g., CNC
machine tools.
In a further embodiment, the plate cylinder to bear the typeform as an interchangeable sleeve. The sleeve can then be easily removed when the plate cylinder is first taken out of its mounting by a removal system, so that then, while the plate cylinder hangs by one of its journals, the sleeve can preferably be drawn vertically downward.
Because of gravity, the weight of the sleeve will contribute to its being easily removable. The exchange of sleeves and not as a definition of the limits of the invention, for which reference should be made to the appended claims.
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DETAILED DESCRIPTION OF THE DRAWINGS
In the drawings, wherein like reference characters denote similar elements throughout the several views:
FIG. 1 is an inventive sheet-fed printing machine with an exchange unit with a gripper and a lifting device, in several positions, for the exchange of a plate cylinder constructed in accord with the teachings of the present invention;
FIG. 2 A sheet-fed printing machine with an exchange unit with a gripper and a lifting device, in several positions, for the exchange of a plate cylinder;
FIG. 3 A sheet-fed printing machine with an exchange unit with a gripper and a lifting ,~ .;;: .. ..- .;, ,:. ~: .
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FIG. 9 A rotary printing machine with a satellite printing unit with an exchange unit that is equipped with a drum storage device;
FIG. 10 A cross-section of a plate cylinder and its mounting;

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DETAILED DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENTS
Referring now to the drawings generally and with reference to each FIG.
specifically, the present invention relates to printing machines 1, 16, 26, 38 having plate cylinders 5, 18, 28, 29, 60 to 63 carrying typeforms which, together with the typeforms, can ., .

circumferential surface of which the sheets are printed on by a plate cylinder 5 via a blanket cylinder 6. Each respective cylinder 4, 5, 6 has a longitudinal axis for rotation thereabout.
The printed sheets are further transported from the impression cylinder 4 to a pickup drum 7. The pickup drum turns the printed sheets over to an impression cylinder, not shown here, of another printing unit of the printing machine 1.
For the purpose of exchanging the plate cylinder 5 with an exchange unit, the printing machine 1 is equipped with a gripper 8, a lifting device 9 and a double gripper 10, which is installed in a frame or rack 11. As shown in FIG. 1, the double gripper 10 is already carrying a plate cylinder S', which can be exchanged for the plate cylinder 5 after the typeform of the latter has been used or when a different print job is to be carried out. The double gripper functions as the cylinder exchange device and, as will be seen in detail below; is movable so that lifting device 9 may place a plate cylinder 5 into the double gripper and receive plate cylinder 5' in exchange therefor.
The gripper 8 is, for example, installed in the frame or rack 11 of the sheet-fed printing machine 1 so as to be swingable in the directions of a double arrow A. Additionally, :' as will become apparent from the discussion below, it may also be desirable in particular embodiments for gripper 8 to additionally be moveable in the direction of double arrow C' . The gripper 8 has two gripping arms 80, each of which is equipped at the end with a prong 82 and n .~ n S, for example and as will become apparent in connection with FIG. 10, a seating slot S1 in a journal 520, of the plate cylinder S.
Inking rollers 130, 131, 132 of inking unit 133 are housed within printing unit la.

Inking rollers 130, 131, 132 are moveable in the direction of arrow B
by use of arrangements known in the art and accordingly, for the sake of clarity, are not shown in FIG. 1.

The lifting device 9 is movable by, for example, a threaded spindle, a toothed rack or a chain drive, in the direction of a double arrow C. As sho-wn, the lifting device is a threaded spindle 91 coupled to the side wall 12 of the sheet-fed printing machine 1.

Referring now to FIG. 2 which shows the arrangement of FIG. 1 during the exchanging of plate cylinder S for plate cylinder S'. As can be seen, inking rollers 130, 131, 132 have moved in the direction of arrow B of FIG. 1. Similarly, double gripper 10 is shown as having moved to an intermediate position for receipt of plate cylinder S.

The gripper 8 and lifting device 9 are arranged so that once prong 82 and clamping device 81 have been grasped by gripper 8, gripper 8 and plate cylinder S may move as a unit to a position where gripper 8 can release plate cylinder S
so as to be carryable by lifting device 9.

The double gripper 10 has two lever arms 100, 101 each of which has a holding device 102, which can be drawn back and forth, for firmly clamping the plate cylinder S or the plate cylinder S' that is to be exchanged for the plate cylinder S during the exchange operation.
I ~ , ;~ i I a .;, , PIG. 3, shows the arrangement of FIG. 1 wherein the plate cylinder S
has been carried by lifting,device 9 to a position 'where it may be received by double gripper 10.

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FIG. 4 further shows that double gripper 10 is rotatable by 180 degrees, in the direction indicated by double arrow D, so that plate cylinder 5 may be moved out of the way ..

the plate cylinder 5. In turn, the double gripper 10, with its two prongs in the seating slots 51 of the plate cylinder 5, picks up the plate cylinder 5 on a lever arm 100. ~ , After the double gripper 10 (FIG. 3) has taken over the plate cylinder 5 from the lifting device 9 and has firmly clamped the plate cylinder 5 by means of the holding device 102, the lifting device 9 again moves downward (double arrow C) out of the swing area of the double gripper 10.
Then the double gripper 10 rotates by 180 degrees (FIG. 4) in order to bring the plate cylinder 5' into the pick-up position for the lifting device 9. The lifting device 9 is again r moved upward, until it reaches the position in which it takes over the plate cylinder 5', as soon as the holding device 102 of the double gripper 10 that is holding the plate cylinder 5' is released.
The plate cylinder 5' (FIG. 5) is then brought by the lifting device 9 and the gripper 8 into its printing position in reverse order but in the same manner that the plate cylinder ,.:...:T.::.. n was previously removed from its position in the printing unit 12 of sheet-fed printing machine 'v''w''~>
1. The inking unit rollers 130, 131 and 132 are then swung back e.g. in the reverse direction to the direction of movement described above in FIG. 1 by double arrow B.
Alternatively, as shown in FIG. 6, a different type of imaging unit can be provided, which is located in a rack 150 and includes an erasing device 151, for example, a plasma torch integrated with the rotational axis of the double gripper 10. In this embodiment, the imaging unit 15 has an engraved roller 152 with an integrated heater. The plate cylinder 5 is movable to a position 52. An image~is imprinted using a foil 153 onto the plate cylinder 5 Q;UtSINONLIT1410040.APP -15-"..
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and is fixed on the typeform by a fixing device 156. During use, the imprinting foil 153 is unwound like a film from a cassette 154, and the used imprinting foil 153 is rewound into a cassette 155. Thus, the imaging sequence may be earned out while sheets are being printed with an image on the plate cylinder 5'.
It is important for the imaging unit 14 or the imaging unit 15 to be installed in a vibration-free manner. If the imaging unit is located above the printing tower, suitable absorption means are provided, in order to capture the vibrations of the cylinder. If such a measure is not sufficient, the imaging unit is located next to or below the printing tower.
It will also be recognized and understood that instead of exchanging a plate cylinder 5 for a plate cylinder 5', as has been described above, the apparatus of the present invention makes it equally possible to exchange other cylinders, for example, the blanket cylinder 6 or the impression cylinder 4, or one or more of the inking rollers 130, 131, 132.
Where other cylinders are to be exchanged, the mountings of the cylinders or rollers must have eccentrics. In this embodiment, the gripper 8 must be able to swing out the cylinders and rollers from the mountings in question. For this purpose, the gripper 8 has, for example, telescopic arms, the length of which can be changed. Thus, for this, the gripper 8 is :' ~~,',, preferably slidable in the direction of a double arrow C' (FIG. 1 to 6).
FIG. 7 shows a rotary printing machine 16 for printing using the offset printing process on a stock web 17 by means of a plate cylinder 18, a blanket cylinder 19 and an ~, ;1 1 ~1 ! , , impression cylinder 20. The rotary printing machine 16 also includes an inking unit 21 and a dampening unit 22.
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v .1 r~ .~ ~j ~I ~ ~ j PB 3751 Form inking rollers 210, 211 and form dampening roller 220 lie on or proximate to the surface of the plate cylinder 18. The rollers are movably mounted to enable them to swing out of the way of plate cylinder 18. As preferred, rollers 210, 211, 220 swing away from plate cylinder 18 so as to allow plate cylinder 18 to move away from blanket cylinder 19, shown for illustration purposes as in the direction of arrow G. As will be recognized by those in the art, for clarity, the apparatus which is used for movement of rollers 210, 211, 220 and plate cylinder 18 is not shown. When the rollers 210, 211, 220 are swung away from the surface of the plate cylinder 18 and the plate cylinder 18 is moved slightly away from the blanket cylinder 19 within the printing machine 16, for example, in the direction of arrow G, the plate cylinder can be removed from the rotary printing machine 16, for example, by means of a cylinder exchange device in the form of a gripping-and-turning system 24 located movably on a rail ' frame 23, and which is movable towards and away from rotary printing machine 16 as shown by double arrow F. The gripping-and-turning system 24 is constructed as a double gripper and, for example, is similar in design to the double gripper 10 shown in FIGS. 1 through 6. The gripping-and-turning system 24 picks up the plate cylinder 18 wit~'~ one of its arms 240. On its other arm 241 it carries a plate cylinder 18' to be exchanged for the plate cylinder 18.
The gripping-and-turning system is preferably centrally located between the rotary printing machine 16 and an imaging device 25 so that the arms 240, 241 may complete a turning movement of 180° without interference. Accordingly, the plate cylinder 18' can then be placed : . ItI 1 , I 1' I
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into the position of the plate cylinder 18 in the rotary printing machine 16.
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and the form dampening roller 220 are swung back, the printing sequence for printing on the stock web 17 may be continued. Having now received the plate cylinder 18, the gripping-and-turning system 24 transports the plate cylinder 18 from the rotary printing machine 16 towards the imaging unit 25. Imaging unit 25 includes an erasing device 250, an imaging device 251 and a fixing device 252. As with the devices shown in FIG. 5 and FIG. 6, the printing image of the typeform on the cylindrical surface of the plate cylinder 18 is first erased by the erasing device 250, and then a new image is provided by the imaging device 251. In addition, there may also be another fixing device 252 available, with which the new printing image can be fixed.
FIG. 8 shows a sheet-fed printing machine 26 which has its own pointing unit or tower 27 for two-color printing. Accordingly, the sheet-fed printing machine 26 contains two plate cylinders 28, 29, each of which transmits an image via a blanket cylinder 30 or 31 onto a sheet, which is held on the surface of an impression cylinder 32 and after being imprinted, is transported away via a transfer device 320.
For the sake of simplification, the inking unit and the dampening unit are not shown in detail in FIG. 8. To exchange the plate cylinder 28, 29 in a single operation, when the subject to be printed is changed, there is a gripping-and-turning system, which includes the grippers 34 and 35 as well as a drum storage device 36. In this embodiment, the grippers 34, 35 grip the plate cylinders 28 and 29, respectively, with holding and clamping devices which operate similarly to those discussed and which, for purposes of clarity, are not shown. The grippers 34, 35 draw the plate cylinders 28, 29, respectively, out of the printing unit or tower QaRSINONLIT1410040.APP -18-~ ~;.~~tlUt~3 27 in the directions of arrows G and J, respectively, and swing the plate cylinders 28, 29 in the direction of arrows I and H toward the empty drums 360, 361 of the drum storage device 36, in order to deposit them therein. In two additional drums 362, 363, the drum storage device 36 carries the new plate cylinders 28', 29' which are to replace the old plate cylinders 28, 29. The drum storage device 36 may then rotate by 180° to move new plate cylinders 28' and 29' into the position for loading into printing unit or tower 27. In this position, the new plate cylinders 28', 29' are moved in a reverse operation by the grippers 34 or 35 and brought into the correct positions within the printing tower 27. As with the embodiments discussed above, while printing is being carried out with the plate cylinders 28', 29', the circumferential surfaces of the old plate cylinders 28, 29 are furnished with new printing surfaces by an imaging unit 37. Additionally, printing tower 27 may also have erasing, imaging and fixing devices as explained above with reference to FIG. 5 and FIG. 7, but are not shown herein.
FIG. 9 shows a rotary printing machine 38 for four-color printing, on a printing stock web 40, with a satellite printing unit 39. There is a gripping-and-turning system on each side of the printing tower with the grippers 41, 42 and 43, 44, respectively.
The grippers 41 to 44 are, for example, attached to the rotational axis of the central impression cylinder 45 of the satellite printing unit 39. On both sides of the satellite printing unit 39 there are drum storage devices 46, 47, which have, in each case, two empty drums and two drums containing the, new plate cylinders 60' and 62' or 61' and 63', respectively, to be exchanged for the used ,I~ ~I i I r; 1 , ~
plate cylinders 60 to 63, and which form, respectively, a cylinder exchange device. The exchange process is carried out with the two gripping-and-turning systems in a manner similar Q:UtS\NONL1T1410040.APP -19-...,~.. . ~ L ".
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to that described above with reference to the sheet-fed printing machine 26 of FIG. 8. Again, as described above, the imaging units 48, 49, are equipped with an erasing, an imaging, and a fixing device which may produce new printing images on the circumferential surfaces of the plate cylinders 60, 62 and 61, 63 while printing is being performed with plate cylinders 60', 62' and 61', 63'.
It will also be recognized by those skilled in the art that chain storage devices may be utilized in place of the drum storage device 36 or 46, 47.
It will further be recognized and understood with respect to the embodiments discussed above that, in addition to the plate cylinders 28, 28', 29, 29' or 60 to 63', additional drums, other cylinders and/or rollers 4, 6, 130, 131, 132 or 19, 20, 210, 211, 220 or 30, 31, 32 or 45 may also be adapted so as to be exchangeable, for example, for replacement due to wear or for cleaning, with corresponding drums, other cylinders and/or rollers stored utilizing a chain storage device or the drum storage device 36 or 46, 47 in accordance with the teachings , of the present invention.
For example, and in particular, where the drum, cylinder or the roller is merely dirty, it can be cleaned by a cleaning device 365 or 465, 475 located next to the chain or drum ..,r.,:~:~
,, storage device 36 or 46, 47. The respective cleaning devices 365 or 465, 475 are attachable to :::,~_.,.:, :;
and detachable from the chain or drum storage device 36; 46, 47. Where cleaning is a ;:.::
contemplated function, a suitable motor should be coupleable to the drum, cylinder or roller so ~ ~ '"f j,~ " i, I I ~, ~ . f '";,,.
that during cleaning, the drum, cylinder or roller will turn about its longitudinal axis in the chain ' ':'.;,, .., i.;~;:~':~:~ !~
or drum storage device 36; 46, 47. ~ ~ ", Q:1RS1NONL1T1410040.APP '2~' .:~ s ' 7 ..

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Referring now to FIG. 10, and as previously noted in connection with FIG. 1, the gripper 8 has two gripping arms 80, each of which is equipped at the end with a prong 82 and ;
a clamping device 81, which fit respectively collateral to the front sides of the plate cylinder S
into a seating slot 51 in a journal 520 of the plate cylinder 5. Similarly, the lifting device 9 has two side prongs which engage the plate cylinder 5 via seating slots 52 in journal 520.
The plate cylinder 5 is installed, using a journal pin 505, above a mounting in the side wall 13. The mounting 50 has a bearing bushing 500 with hydraulic clamping, in which a bearing sleeve 501 is movably located within an area d parallel to the longitudinal axis of the plate cylinder 5. Via an axial bearing 503 and a radial bearing 504, the journal pin 505 for the plate cylinder 5 is movably located in the bearing sleeve 501. The journal pin 505 is also equipped with a plate cylinder clamping mechanism 506, which has clamping jaws 507.
The clamping jaws 507 encircle a corresponding fastening pin 508 of the plate cylinder 5 and are, for example, pneumatically loaded and relieved. In addition, thz plate cylinder 5 and the journal pin 505 each have a corresponding serration 509, for example, a Hirth-type serration, ' through which the plate cylinder 5 is held and centered on the shaft. The plate cylinders 5', 18, 18', 28, 28', 29, 29' and 60 to 63 and 60' to 63' are installed in a similar or identical manner.
It will be further recognized and understood that instead of the serration 509 shown here, other. types of serrations may be used, for example, serrations in which the teeth are slanted at the roots, so that the plate cylinder S is self centering x ' ~:!;
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the plate cylinder 5 during its removal or during its return, mechanical, optical or electronic positioning means can be used alone or in conjunction with the serrations.
Furthermore, a correct mounting of a cylinder in terms of circumferential register is important, not only in the case of the plate cylinder, but also for example, in the case of the blanket cylinder, if the latter has no seamless rubber sleeve. Correct mounting is also important 'v 2._Yl..~~1~.~
in the case of the form inking roller, if the plate cylinder has one or more channels and the form inking roller has corresponding reliefs in the contour of its core where, instead of the core material, there are thickenings of its outer covering, which respectively roll off the channels of the plate cylinder.
In another embodiment of the present invention shown with reference to FIGS.
11 and 12, a rotary printing machine 16 as for example, disclosed in DE 35 43 704 Al, is equipped with a plate cylinder 95, the typeform of which is designed as an interchangeable sleeve 96 which is held frictionally on the covering of the plate cylinder. In accord with the teachings of the present invention, the plate cylinder 95, like the plate cylinder 18 of FIG. 7, is lifted out of the rotary printing machine 16 by a removal system 90 by means of gripper 92 and gripper 93 which is blocked from view by gripper 92 in FIG. 11 but is visible in FIG. 12.
The grippers 92 and 93, respectively, hold the plate cylinder 95 in the slots 51 in its journals ~i~Uut~~

is returned to the horizontal position and replaced into the printing unit 16 for the continuation of the printing process. .
FIG. 13 shows the sheet-fed printing machine 1 of FIG. 1 employing the plate cylinder 95 with an interchangeable sleeve 96 of FIGS. 10 and 11. As will be readily apparent, the other parts and elements correspond to the parts and elements identified and described above and are therefore not discussed. The lifting device 9 has two gripping arms 901, 902. The gripping arm 901 has a clamping device (not shown here) with which it can clamp and hold the ~.~~a~utD

of double arrow C, in order to create space for sleeve 96 to be removed. Once gripping arms 901 and 902 have been moved to their proper respective locations, using a removal device, not shown here, the sleeve 96 of the plate cylinder 95 can then be pulled downward.
A still further embodiment of the present invention is shown in FIG. 15, in which frame 11 or 11' are removed or unnecessary. Again the plate cylinder 95 is held and clamped firmly by the gripping arm 901 of the lifting device 9. However, because in this sheet-fed printing machine 1 the frame 11 or 11' is not present, the plate cylinder held on the gripping arm 901 can be rotated in the horizontal plane in the direction of an arrow M, around its journal :-y r ~
520' above the printing tower after the other gripping arm 902 of the lifting device 9 is moved , . .
as hereinabove discussed a distance downward out of the swing area of the gripping arm 901.
Then the sleeve 96 can be pulled off horizontally by a removal device, not shown, from the plate cylinder 95 and exchanged for a replacement sleeve. Through a reverse sequence . of movements, the plate cylinder 95 is again placed in its mounting 50 in the sheet-fed printing la~v~~~~

respective printing units 401 to 405 and position the cylinder or roller in the area between the printing towers 401 to 405 in such a way that a trolley 414 located on a rail 413 above the sheet-fed printing machine 400, which has a telescopic arm 415, can grip the cylinder or the roller.
Then the trolley 414 transports the cylinder or the roller either to an exchange device not shown, which in turn has, for example, a drum storage device as shown in FIGS. 8 and 9, or to a .
cleaning device 416 in which the cylinder or roller is cleaned.
If the cylinder is a plate cylinder with a renewable typeform, the trolley 414 transports the cylinder to an erasing device 417. There the image which the typeform displays on its cylindrical surface is erased. Then the typeform is provided with a new image in an imaging device 418. The new printing image is then fixed in a fixing device 419. The cylinder is placed on the telescopic arms 415 in such a way that it can be rotated by means of a motor, so that it can be rotated on its longitudinal axis during the erasing, imaging and fixing process or during cleaning.
a Instead of the trolley 414, which is installed in hanging fashion, there can also be , ~ , 's a device that stands to the side of the printing units and is movably installed next to the printing units 401 to 405 either on a rail system or controlled inductively by a wire system located, for example, along or embedded in the underlying floor, or through optical or electrical waves.

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~1~~~~~i can be located, in each case, between two printing units and can carry out the exchange of any desired cylinders and rollers in these units. For this purpose, the exchange units with the grippers 8; 24; 34; 35; 41 to 44 and the cylinder exchange devices 10; 24; 36;
46, 47 are preferably installed so as to be rotatable around their respective vertical axes.
Instead of the form cylinders 5, 18, 28, 29, 60 to 63, it is also possible to exchange other cylinders or rollers 4, 6, 130, 131, 132; 19, 20, 210, 211, 220; 30, 31, 32; 45.
The plate cylinder 95 can also be covered with an interchangeable sleeve 96 which constitutes the typeform.
The invention described in respect to the sheet-fed and rotary printing machines 1, 16, 26, 38, 400 for the offset printing process is not limited thereto, and thus can also be applied to printing machines used in other types of printing processes, for example, intaglio printing, In another embodiment of the invention, a rotary or sheet-fed printing machine 1, 16, r . . . ' .. , , ~ f'.;i !~ i ~i .o;l:, '~'lj ,'.

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Claims

1. The printing machine comprising at least one plate cylinder having journals at the end thereof;
a typeform in the form of a sleeve held frictionally on the plate cylinder;
a mounting for supporting the plate cylinder in the printing machine comprising means for attaining side registry and circumferential registry of the plate cylinder in the printing machine;
a removal device associated with the printing machine for removing the plate cylinder from the mounting;
said removal device comprising a holder for holding the plate cylinder on one of the journals, while the other journal is free; and a sleeve exchange device for withdrawing the sleeve from the plate cylinder and for exchanging the sleeve with a replacement sleeve.

2. The printing machine of Claim 1, wherein the plate cylinder has transverse axes and wherein the removal device further comprises two gripping arms, for swinging the plate cylinder out of the mounting, and for rotating the plate cylinder around one of the transverse axes so that the plate cylinder hangs vertically from one of the gripping arms, and so that the other gripping arm is swung away from the plate cylinder thereby permitting the plate cylinder to hang freely and for permitting the downward withdrawal of the sleeve.

3. The printing machine of Claim 1, wherein the plate cylinder is part of a printing unit and wherein one of the removal device and the sleeve exchange device is located one of next to, below and above the printing unit of the printing machine.

4. The printing machine of Claim 1, additionally comprising a deposit magazine having one of a drum storage device and a chain storage device.

5, The printing machine of Claim 4, additionally comprising means in one of the drum storage device and chain storage device for rotating stored cylinders around their longitudinal axis and for cleaning the circumferential surface thereof.

6. The printing machine of Claim 1, additionally comprising an imaging unit for putting a new image on said sleeve; and means for rotating the plate cylinder during imaging around its longitudinal axis.

7. The printing machine of Claim 6, wherein the imaging unit comprises an erasing device for erasing the printing image of the sleeve and an imaging device for producing a new printing image on the sleeve.

8. The printing machine of Claim 7, wherein the imaging unit further comprises a fixing device for fixing the printing image on the sleeve.

9. The printing machine of Claim 7, wherein the imaging unit includes means for applying an image by one of inkjet, laser ablation and thermotransfer process.

10. The printing machine of Claim 2, additionally comprising a lifting device for lifting the cylinder, and means for engaging the gripping arms and the lifting device with the cylinder.

11. The printing machine of Claim 10, wherein the cylinder comprises a serration at the end face thereof.

12. The printing machine of Claim 11, in which the serration is a Hirth-type serration.

13. The printing machine of Claim 1, additionally comprising a cylinder clamping device in the side wall; said cylinder clamping device comprising a clamping pin for holding the cylinder.

14. The printing machine of Claim 1, wherein the mounting further comprises a stationary bearing bushing disposed in the side wall; a bearing sleeve movable with respect to the bearing bushing in the direction of the longitudinal axis of the cylinder for permitting the removal thereof.

15. The printing machine of Claim 2, wherein the gripping arms comprise telescopic gripping arms for removing the cylinder or the roller from the mounting.

16. The printing machine of Claim 1, additionally comprising a cylinder exchange device comprising a rail system.

17. The printing machine of Claim 1, comprising two or more printing units, and wherein the removal device and the sleeve exchange device are located between two of the printing units for the exchange of the cylinders or rollers in the printing units.

18. The printing machine of Claim 1, comprising two or more printing units, and means next to the printing unit for guiding the removal device and the sleeve exchange device laterally of the printing units; said guiding means comprising one of a rail system and a system controllable inductively by means of a wire system running below the floor or through electrical or optical waves.

19. The printing machine of Claim l, additionally comprising a lifting device having two gripping arms of which one is mounted for rotation around one of its vertical and horizontal axis, for swinging the plate cylinder with its sleeve into a horizontal or a vertical position so that the plate cylinder either stands or hangs for permitting the sleeve to be drawn either horizontally to the side, vertically upward or vertically downward.