JPH06286099A - Offset printer - Google Patents

Abstract

PURPOSE:To print different contents at each of print sheets such as address writing simultaneously upon normal printing. CONSTITUTION:A sheet feeding cylinder 3 is arranged at a downstream side of a sheet feeder 1, and an impression cylinder 4 is disposed adjacent to the cylinder 3. A rubber cylinder 5 is disposed adjacent to the cylinder 4 at a downstream side of the cylinder 3, and a plate cylinder 6 is disposed adjacent to the cylinder 5. An ink jet recorder 9 is arranged in the vicinity of a downstream side of the cylinder 4 from the cylinder 5. A magnetic disk and an ink jet controller 10 for transmitting image data from an exterior such as image transmission to the recorder 9 are connected to the recorder 9.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an offset printing machine.

[0002]

2. Description of the Related Art Generally, an offset printing machine is widely known in which printing is performed by supplying printing paper into a printing machine and conveying the printing paper between a blanket cylinder and an impression cylinder.

In such an offset printing machine,
Addressing such as postcards and envelopes cannot be processed by one printing, and two processes have to be performed, so that efficiency and the like are very poor.

Therefore, it has been proposed that a conventionally known ink jet recording apparatus applies printing directly to the plate cylinder with an image-forming material and a non-image-forming material for printing (Japanese Patent Laid-Open No. 4-97848). Further, in this printing machine, since the plate cylinder directly functions as a printing plate, there is no need for work such as plate making and plate replacement, and printing work can be performed easily. Further, by rewriting an image for each sheet of printing paper, it is possible to print postcards and addressing of envelopes.

[0005]

However, in the printing machine as described above, a special printing cylinder suitable for an ink jet recording apparatus is required as a printing cylinder, and therefore, it is used in a general printing machine. In this case, a plate cylinder must be prepared separately, and it takes time and effort to replace the plate cylinder when using. In addition, when printing different images such as address writing, the plate cylinder cleaning must be performed each time, so that the printing speed cannot be increased, which is inefficient.

The present invention has been made in view of the above-mentioned problems, and it is not necessary to separately prepare a plate cylinder for an ink jet recording apparatus, and moreover, it can be easily incorporated in an ordinary offset printing machine. It is an object of the present invention to provide an offset printing machine capable of simultaneously performing two different processes such as printing of different images such as an address book and printing of a common image.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a paper feeding device for feeding a printing paper, an impression cylinder disposed on the downstream side of the paper feeding device, adjacent to the impression cylinder, and A blanket cylinder on which printing is performed by transporting the printing paper between the impression cylinder, a plate cylinder that is adjacent to the blanket cylinder and around which a printing plate is wound, and is provided on the downstream side of the impression cylinder. In an offset printing machine provided with a paper discharge device for discharging the printing paper, an ink jet recording device is arranged in the vicinity of the impression cylinder, and the ink jet recording device is provided with the ink jet recording device. An ink jet control device for transmitting print data and controlling the operation is connected.

[0008]

When the printing paper is fed from the paper feeding device, the printing paper is conveyed between the blanket cylinder and the impression cylinder. Here, since the plate cylinder is adjacent to the blanket cylinder, the printing image is transferred, and this printing image is printed on the printing paper conveyed between the blanket cylinder and the impression cylinder. Further, printing is performed by the ink jet recording device. The print data for the ink jet recording device is input by the ink jet control device. Then, the printing paper is ejected from the paper ejection device.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view of an offset printing machine according to the present invention. In the figure, reference numeral 1 denotes a sheet feeding device, and the sheet feeding device 1 sequentially feeds the printing paper 2 one by one into the printing machine. A paper feed cylinder 3 is disposed downstream of the paper feed device 1, and an impression cylinder 4 is adjacent to the paper feed cylinder 3. Further, a blanket cylinder 5 is adjacent to the impression cylinder 4 downstream of the paper feed cylinder 3, and a plate cylinder 6 is adjacent to the blanket cylinder 5.
An ink supply section 7 and a water supply section 8 are adjacent to the plate cylinder 6. An ink jet recording device 9 is arranged near the impression cylinder 4 on the downstream side of the blanket cylinder 5. This ink jet recording device 9 has a magnetic disk,
An ink jet control device 10 for transmitting image data from the outside such as image transmission to the ink jet recording device 9 is connected. A discharge cylinder 11 is adjacent to the impression cylinder 4 on the downstream side of the ink jet recording device 9, and is discharged to the outside of the printing machine by the discharge device 12. Further, a rotary encoder (not shown) for detecting the rotation amount is attached to the impression cylinder 4, and the rotation amount detected by this rotary encoder is transmitted to the ink jet control device 10 as position data of the printing paper. The printing machine and the ink jet recording apparatus 9 are controlled so as to synchronize with each other.

The operation of the offset printing machine configured as described above will be described. Printing paper 2 by the paper feeding device 1
Are sequentially supplied to the printing machine. The printing paper 2 is clamped by the paper feed cylinder 3 and transferred to the impression cylinder 4. The printing image of the plate cylinder 6 transferred to the blanket cylinder 5 is the impression paper 4 of the printing paper 2.
Printing is performed on the printing paper 2 by conveying between the blanket cylinder 5 and the blanket cylinder 5. Further, the rotation amount of the impression cylinder 4 is constantly detected by a rotary encoder (not shown), and the detected amount is input as a signal into the ink jet control device 10. Based on this signal, a signal is transmitted from the ink jet control device 10 into the ink jet recording device 9, the ink jet recording device 9 operates based on this signal, and the printing paper 2 is appropriately addressed to the printing paper 2. It is possible to print a book. This ink jet recording device 9
After printing by, the printing paper 2 is delivered to the paper ejection cylinder 11, and is ejected outside the printing machine by the paper ejection device 12. In this way, it is possible to print an address book or the like different for each printing paper sheet during a normal printing operation.

As the ink jet recording apparatus 9 used in the present invention, a widely known one is used.
When the impression cylinder 4 is rotating, the head moves in the axial direction of the impression cylinder 4 while printing, and when the head is the impression cylinder 4
Any of a line type that is fixedly provided with a width dimension of, and electrically scans in the width direction and prints. In addition, although the rotary encoder (not shown) is attached to the impression cylinder 4 in the above-described embodiment, the rotary encoder is not necessarily the impression cylinder 4 as long as it can be synchronized with the conveyance of the printing paper 2. Furthermore, in the above-described embodiment, the ink jet recording device 9 is arranged on the downstream side of the blanket cylinder 5, but it is not necessarily on the downstream side, and may be on the upstream side of the blanket cylinder 5, for example. Any position may be used as long as it can be synchronized with the position of the printing paper 2.

[0012]

The present invention is constructed as described above, and by mounting the ink jet recording apparatus on the offset printing machine and operating the ink jet recording apparatus in synchronization with each other, an image by the ink jet recording apparatus can be simultaneously printed. There is an effect that it can be created, and different works which were conventionally performed in two steps can be made into one step.

[Brief description of drawings]

FIG. 1 is a sectional view of an offset printing machine according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Paper feeding device 2 ... Printing paper 4 ... Impression cylinder 5 ... Blanket cylinder 6 ... Plate cylinder 9 ... Ink jet recording device 10 ... Ink jet control device 12 ... Paper ejection device

Claims (1)

[Claims] 1. A paper feeding device for feeding printing paper, an impression cylinder arranged downstream of the paper feeding device, and a printing device provided adjacent to the impression cylinder and between the impression cylinder. A blanket cylinder on which printing is performed by transporting the paper, a plate cylinder adjacent to the blanket cylinder and around which a printing plate is wound, and provided on the downstream side of the impression cylinder to eject the printing paper. In an offset printing machine equipped with a paper discharge device, an ink jet recording device is arranged in the vicinity of the impression cylinder, and print data is transmitted to this ink jet recording device to perform operation. An offset printing machine characterized by being connected with an ink jet control device for controlling.