JPS6217541B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In a typical rotary press, dry offset printing is composed of a plate cylinder, a blanket cylinder, and an impression cylinder. Further, offset sammel printing is composed of an inked partial plate cylinder, a collecting cylinder (blanket cylinder), a blanket cylinder, a collecting plate cylinder, and an impression cylinder.

On the other hand, intaglio printing consists of a plate cylinder and an impression cylinder. Conventionally, these three types of printing have been produced and put into practical use either individually or as a rotary printing press using a combination of dry offset and intaglio printing.
The present invention relates to a rotary printing press that combines these three types of printing and uses a combination of dry offset, offset sammel, and intaglio to print simultaneously using one impression cylinder.

In rotary printing presses, these three types of printing are:
Although each printing method has its own unique characteristics,
Considering the printing conditions on the impression cylinder, in intaglio printing, ink is packed into a print with some lines engraved on a smooth surface, and the ink adheres to the smooth part that occupies most of the print excluding the lines. All of the ink that has been applied is wiped off, and an impression cylinder with a smooth surface holding the printing paper is pressed and rotated to print on the printing paper.

In dry offset printing, the ink on the letterpress surface, which has slight irregularities that are not related to direct printing, is instantly transferred to the smooth surface of the blanket cylinder, and then the blanket cylinder and impression cylinder are pressed together and rotated. It is used for printing. In offset sammel printing, ink is applied to each color on a cylinder called an inked part cylinder, which has a surface made up of a partial pattern with minute irregularities, and is then printed onto a smooth collection cylinder (blanket cylinder). The ink is transferred and aggregated on the surface of the plate, and the aggregated ink is further transferred onto the letterpress printing plate surface of the collecting plate cylinder, which has slight irregularities. This aggregate plate is not related to direct printing; the ink on the plate is further transferred to the smooth surface of the blanket cylinder, and offset printing is completed by pressing and rotating the blanket cylinder and impression cylinder. let

The above printing methods are well known, but if you compare dry offset and offset sammel printing, they differ in the process by which ink is transferred to the surface of the blanket cylinder. Ink is transferred to the surface in both cases using a letterpress plate, which is not involved in printing, and printing is completed by pressing and rotating a blanket cylinder with a smooth surface and an impression cylinder with a smooth surface. be.

In this way, in the printing part, all three types, including intaglio printing, print on a smooth cylinder surface, so they can be said to be common printing methods in this respect. Therefore, the same type of impression cylinders can be used, and printing of three types can be performed simultaneously with one impression cylinder. In this case, by appropriately controlling the printing strength and the diameter of the plate cylinder and other cylinders, it is possible to complete a complete combination of dry offset printing, dry offset sammel printing, and intaglio printing. Additionally, in dry offset printing and offset sammel printing, as explained in the previous section, the number of ink transfers, that is, the number of ink splits, differs depending on the two, but it is important to use the appropriate ink. Therefore, it is possible to show sufficient density on printing paper and to maintain a balance between the two. Note that the printing order is dry offset and offset sammel printing are performed first, and during intaglio printing, it is possible that some of the undried ink on the printing paper may set off onto the intaglio plate surface. Since the intaglio plate surface is cleaned each time it is printed, there is no problem with actual printing.

The offset sammel intaglio rotary printing press according to the present invention has a dry offset printing section of 2 colors, an offset sammel printing section of 3 colors, and an intaglio printing section of 3 colors, and the intaglio printing section is designed for sammel printing. However, various combinations of the number of colors are possible. Further, the three printing methods can be used alone, or a combination of dry offset and intaglio, or offset sammel and intaglio can be used, and the number of plates for each cylinder can be freely selected.

The operation of the present invention will be explained with reference to separate drawings. Printing paper fed from a paper feeder 1 passes through a paper delivery device 2 and is held onto an impression cylinder 3 by a gripper, and as the impression cylinder 3 rotates, it is rotated in contact with the impression cylinder 3 for offset printing. By passing between the blanket cylinder 4 and the intaglio plate cylinder 11, the combination of dry offset, offset sammel printing and intaglio printing is completed. It is conveyed to the paper discharge device 16. Two plate cylinders 5 are in contact with the blanket cylinder 4 of the dry offset section so as to correspond to the blanket surface of the cylinder 4, and the plate cylinders 5 are each supplied with ink of a different color by an inking device 6. be done. On the collecting cylinder (blanket cylinder) 7 of the offset sammel part, three fleshed part cylinders 8 are on the collecting cylinder (blanket cylinder) surface of 7, and the collecting plate cylinder 9 is attached to the collecting cylinder (blanket cylinder) 7 and the dry sheet cylinder. The offset portions are in contact with the body surface of the blanket body 4 which is common to the offset portions so as to correspond to each other.
Ink is supplied to the collecting plate cylinder 9 from the inking section cylinder 8 through a collecting cylinder (blanket) containing inks 7 of different colors, and the ink is supplied to the inking section cylinder 8 by the inking device 10. It also supplies ink. In the intaglio printing section, ink of different colors is supplied to the plate surface on the intaglio printing cylinder 11 by three inking rollers 12 that rotate in contact with the inking roller 12. The ink is supplied by the ink. Reference numeral 17 is a printing device for printing a management number on printing paper, and reference numeral 18 is a wiping device for wiping off excess ink on the surface of the intaglio plate.

[Brief explanation of the drawing]

The separate figure shows a mechanical diagram of an offset sammel intaglio rotary printing machine according to the present invention, which is a dry offset and offset printer equipped with one impression cylinder, a blanket cylinder and an intaglio printing cylinder that rotate in contact with the impression cylinder. It is a rotary printing press that combines Sammel and intaglio. 1...Paper feeder, 2...Paper delivery device, 3...Impression cylinder, 4...
Blanket cylinder, 5... plate cylinder, 6... inking device, 7...
Collected cylinder, 8... Filled portion cylinder, 9... Collected plate cylinder, 10...
Inking device, 11... Intaglio cylinder, 12... Inking roller, 13... Inking device, 14... Paper take-up cylinder, 15... Paper feed chain, 16... Paper discharge device, 17... Management number printing device, 18... Wiping device .

Claims (1)

[Claims] 1 By simultaneously rotating the dry offset printing device, the common blanket cylinder of the offset sammel printing device, and the plate cylinder for intaglio printing on one impression cylinder, dry offset printing and offsetting of a single color or several colors can be performed. A combination of three types of printing equipment: dry offset, offset sammel, and intaglio for the purpose of simultaneously printing set sammel printing and single-color or multi-color intaglio printing on the same printing paper with the same bite. Rotary printing press.