JP3032729U - Sheet-fed printing press - Google Patents

Abstract

(57) Abstract: Handling a large paper feed pile and a paper discharge pile by configuring a sheet-fed printing press so as to obtain as much space as possible between a paper feed device and a paper discharge device. Therefore, it is possible to operate for a long time. SOLUTION: Sheets 3 horizontally arranged one behind the other.
Two satellite-type printing units 1 for printing
In a sheet-fed printing machine having a sheet feeding device 4 having a sheet feeding pile 5 and a sheet feeding device 6 having a sheet discharging pile 7, a reversing device 8 is provided between the satellite type printing units 1 and 2.
And the paper feeding device 4 and the paper discharging device 6 are arranged outside the satellite type printing units 1 and 2.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention is directed to two satellite type printing units for printing sheets, which are horizontally arranged one behind the other, a sheet feeding device having a sheet feeding pile, and a sheet discharging device having a sheet discharging pile. A sheet-fed printing press having a device.

[0002]

[Prior art]

 A sheet-fed printing machine of this kind is known from DE-A 43 03796 A1. In this sheet-fed printing press, one sheet-feed and one sheet-ejection are used so that the sheet-feed of one satellite-type printing unit is directly connected to the sheet-feed of the other satellite-type printing unit. The two satellite-type printing units on the side of the two correspond to each other. However, by doing so, the paper feeding device and the paper discharging device are also arranged in the middle of the two satellite type printing units. With this configuration, it is possible to print on both sides of the sheet without reversing the sheet, but this advantage is linked to the disadvantage. In other words, very little space is available in the area of the feeder and the ejector. As a result, the input and output piles must be kept very small. This goes against the requirement that the press should be able to run as long as possible without having to refill or remove the sheet pile. Due to the small space, automatic pile feeding or automatic pile removal is also impossible.

[0003]

[Problems to be solved by the invention]

 The object of the invention is to construct a sheet-fed printing press of the type mentioned at the outset in order to obtain as much space as possible between the feeder and the ejector.

[0004]

[Means for Solving the Problems]

 In the present invention, the above object is achieved by arranging the reversing device between the satellite type printing units, and arranging the paper feeding device and the paper discharging device outside the satellite type printing unit.

In the printing machine according to the present invention, a sufficient space can be obtained in the paper feeding device and the paper discharging device. It is possible to place large sheet piles, and it is also possible to increase the pile height by installing the machine higher. There is ample space for an automatic pile changer. The machine requires very little space. With this configuration, a very compact multicolor printing machine, for example, an eight-color printing machine can be constructed.

It is preferable that the two satellite type printing units are configured identically. In this case, the first printing unit has the reversing device instead of the paper discharging device, and the second printing unit has the second satellite type printing unit and the reversing device at the position of the feed pile. Only the connecting sheet transport sections are placed.

In another configuration, the reversing device can be switched so that the reversing cylinder becomes a guide cylinder. With this configuration, it is possible to replace the back printing with front printing that requires more colors than is possible with one satellite-type printing unit. The reversing cylinder can operate, for example, on the mouthpiece-holding-claw principle. This principle is known, for example, from DE-A 36 43 915 A1. In order to ensure the optimum transfer of the sheet from the impression cylinder to the reversing cylinder, the sheet is pressed at the contact line between the reversing cylinder and the impression cylinder until the gripper grips the edge of the sheet. A guide segment can be arranged around the outer circumference of the reversing cylinder.

Another measure to ensure that the sheet is held on the impression cylinder until it is received by the reversing device is that the impression cylinder of one or both satellite-type printing units has a surface with a spherical bearing surface. And has a through hole through which suction air can be supplied to hold the sheet. See European Patent Specification No. 0165477B1 for detailed configuration.

A chain delivery device can be inserted between the reversing cylinder and the second satellite-type printing unit for sheet transport.

In another configuration of the reversing device, a transport system with a gripper bar is arranged between the satellite-type printing units, which gripper bar feeds the sheets conveyed by selection. The process from the first satellite type printing unit to the second satellite type printing unit is made to proceed without reversing around the center line of the direction. A transport system of this kind is known, for example, from German Patent No. 344 4848 C2. This transport system is very cheap, simple in structure and easy to operate.

It is preferable that the impression cylinder of the satellite type printing unit including the paper discharge device has a surface that does not accept ink. With this configuration, it is possible to avoid the first set-off of printing at the time of back-printing. Advantageously, one or more devices for treating the surface of the sheet are provided between the last blanket cylinder and the point of receiving the sheet from one or two impression cylinders. Such a device can be, for example, a dryer. This dryer takes care to ensure that the printed ink is sufficiently dry for back-printing and for placing sheets on the output pile. An additional advantage of placing the dryer in the impression cylinder is that the sheets are held in the cylinder by blast air.

[0012]

[Embodiment of the invention]

 Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a printing press having a first satellite-type printing unit 1 and a second satellite-type printing unit 2. The two satellite type printing units 1 and 2 are arranged one behind the other in a horizontal plane, with a reversing device 8 between them. The first satellite type printing unit 1 comprises a paper feeding device 4 (symbolically shown in the figure) which receives the sheet 3 from the paper feeding pile 5 and sends it to the printing unit. The satellite type printing units 1 and 2 consist of a large plate cylinder 14 or 14 '. These plate cylinders are designed so that, for example, four sheets 3 can be received. Four plate cylinders 14, 14 'are arranged on each of the impression cylinders 11, 11' in order to produce a four-color printing. These plate cylinders 14 and 14 'cooperate with the blanket cylinders 12 and 12', and are supplied with one color by the inking devices 15 and 15 ', respectively. These plate cylinders 14, 14 'can be provided with a device 19 for making printing plates in the machine, for example by digital image processing.

The reversing device 8 can be switched so that the reversing cylinder 9 is preferably used as a guide cylinder having an outer circumference with two sheet supports. For this purpose, at the contact line between the impression cylinder 11 and the doubled reversing cylinder 9, the front end of the sheet 3 is gripped by the reversing cylinder gripper 18, exactly as in the guide cylinder. It will be further transported. In this operating state, two satellite type printing units 1 and 2 are provided for only one front printing. By switching to double-sided printing, the gripper claws 16 of the impression cylinder 11 do not deliver the front end of the sheet 3 at the contact line between the impression cylinder 11 and the reversing cylinder 9 and the sheet edge is It is adjusted to continue transport until it reaches the contact line. The guide segments 21 arranged on the outer circumference of the reversing cylinder 9 can then be used to press the sheets against the impression cylinder 11 until they are received from the impression cylinder 11. For this purpose, the guide segment 21 can be arranged radially movable. In order to receive the sheet from the impression cylinder 11, the mouthpiece 17 is actuated to grip the trailing edge of the sheet. After that, the reversing cylinder gripper 18 grasps the edge of the sheet which has been swung inward by the sucker 17. Since the sucker 17 and the reversing cylinder gripper 18 can be swung, the sheet 3 can be put in the position shown. In this position, the gripper jaws 16 of the impression cylinder 11 can release the former front end of the sheet 3, ie the current rear end. The sheet can then be reversed and conveyed from the reversing cylinder 9 to the chain delivery device 10. The chain transfer device 10 feeds the inverted sheet 3 to the sheet feeding device 4 ', and the sheet feeding device 4'supplies this sheet 3 to the second satellite type printing unit 2 for back printing. To do so. The second satellite-type printing unit 2 has a paper ejection device 6 for placing the sheet 3 on the paper ejection pile 7. The path of the sheet 3 is indicated by an arrow, and the triangle 20 represents the side of the sheet 3 already printed at this position.

The satellite-type printing units 1 and 2 are further equipped with a surface treatment device 13 for the sheet 3 between the last blanket cylinder 12 ′ and the location for receiving the sheet 3 from the impression cylinder 11 or 11 ′. At least one 13 'can be provided. The device can be a dryer, chiller, powder applicator, or other device. In any case, by doing so, it is possible to carry out the reverse printing and the placement of the sheet 3 on the discharge pile 7 better. Furthermore, in this way the sheet 3 is better retained on the impression cylinder 11 or 11 '.

The representations in the figures are, of course, merely examples, and very different types of reversing devices can be provided.

[Brief description of the drawings]

1 is a layout side view of a sheet-fed printing press having first and second satellite-type printing units according to the present invention; FIG.

[Explanation of symbols]

 1 first satellite type printing unit 2 second satellite type printing unit 3 sheets 4, 4'paper feeding device 5 paper feeding pile 6 paper discharging device 7 paper discharging pile 8 reversing device 9 reversing cylinder 10 chain transfer device 11 , 11 'impression cylinder 12, 12' blanket cylinder 13, 13 'surface treatment device 14, 14' plate cylinder 15, 15 'inking device 16 gripper claw 17 sucker 18 reverse cylinder gripper claw 19 printing plate making device 20 sheets A triangle that represents the printed side of a guide segment

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[Procedure amendment]

[Submission date] August 22, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 11

[Correction method] Change

[Correction contents]

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical display location B41F 21/10 B41F 21/10 23/04 23/04 A (73) Utility model holder 390009232 Kurfuersten- Anrage 52-60, Heidelberg, Fedéral Repli ll of Germany.

Claims (11)

[Utility model registration claims] 1. Paper feed comprising two satellite type printing units (1, 2) arranged horizontally one behind the other for printing sheets (3) and a paper feed pile (5). In a sheet-fed printing press having a device (4) and a discharge device (6) with a discharge pile (7), a reversing device (8) is arranged between satellite type printing units (1, 2). The satellite type printing unit (1,
A sheet-fed printing press, characterized in that a paper feeding device (4) and a paper discharging device (6) are arranged outside of 2). 2. The satellite type printing unit (1,
2. A sheet-fed printing press according to claim 1, wherein 2) are configured identically. 3. Sheet-fed press according to claim 1, wherein the reversing device (8) can be switched such that the reversing cylinder (9) serves as a guide cylinder. 4. Sheet-fed printing machine according to claim 3, wherein the reversing cylinder (9) operates on the suction-holding-claw principle. 5. A gripper (18) grips the edge of the sheet (3) at the contact line between the reversing cylinder (9) and the impression cylinder (11) on the outer circumference of the reversing cylinder (9). A guide segment (21) for pressing the sheet against the impression cylinder (11) is arranged up to
A sheet-fed printing press according to any one of claims 1 to 4. 6. The impression cylinder (11) of the at least one satellite type printing unit (1, 2) comprises a surface having a spherical crown-shaped support surface for holding the sheet (3). The sheet-fed printing press according to any one of claims 1 to 4, wherein the sheet-fed printing press has a through-hole for sucking air. 7. A chain transfer device (10) between the reversing cylinder (9) and the second satellite type printing unit (2).
7. A sheet-fed printing press according to any one of claims 1 to 6, in which is inserted. 8. A transport system with a gripper bar is arranged between the satellite-type printing units (1, 2), the gripper bar being a sheet (3) conveyed by selection.
3. The process from the first satellite-type printing unit (1) to the second satellite-type printing unit (2) proceeds with or without inverting the sheet around the center line in the sheet feeding direction. Or the sheet-fed printing press according to 2. 9. Sheet according to claim 1, wherein the impression cylinder (11) of the satellite type printing unit (2) provided with a paper ejection device (6) has a surface which does not accept ink. Leaf printing machine. 10. The last blanket cylinder (12 ') and impression cylinder (11).
Or at least one surface treatment device (13, 13 ') for the sheet (3) is provided between it and the part receiving the sheet (3) from 11'). A sheet-fed printing press according to any one of items. 11. Sheet-fed printing press according to claim 10, wherein the device (13, 13 ') is a dryer.