JPS6321416Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a numbering printing unit in a tandem offset rotary printing press.

BACKGROUND OF THE INVENTION A unique numbering printing unit is desired by printers using tandem multicolor offset rotary presses. If the numbering printing unit is to be manufactured in large quantities, a special printing unit would have to be manufactured for the numbering printing unit. However, this requires additional costs, for example a new side machine frame, so that it is foreseeable that the purchase price of the numbering printing unit will be high.

An offset printing unit is used to produce a numbering printing unit, the rubber cylinder of the offset printing unit is replaced with a numbering cylinder, an inking rubber cylinder is provided in place of the plate cylinder of the offset printing unit, and offset printing is performed. It has already been attempted to keep the dampening unit of the offset printing unit separate from the numbering cylinder, apply ink to the inking cylinder with the inking roller of the inking unit of the offset printing unit, and apply ink to the numbering cylinder with this inking cylinder. It is being In this case, the inking blanket cylinder and the numbering cylinder have the same diameter and are driven at the same speed, so that the letters on the numbering cylinder hit the same location on the inking blanket cylinder. As a result, not only is the rubber cloth of the ink applicator cylinder damaged, but also the ink applicator is not sufficiently inked. Therefore, in a numbering printing unit using an offset printing unit in this manner, clean ink application cannot be guaranteed. Moreover, in this numbering printing unit, the inking device and the dampening device are left as they were, and only an inking blanket cylinder is used instead of the plate cylinder, and a numbering cylinder is used instead of the blanket cylinder. Since the number of components is the same as in the case of an offset printing unit, approximately the same technical outlay as in an offset printing unit is required.

Problems to be Solved by the Invention The problem to be solved by the invention is to use an existing offset printing unit to install a part of the existing inking device and dampening device in the offset printing unit, as well as the drive device and switch attached thereto. By utilizing
To construct a numbering printing unit as inexpensive as possible, capable of uniformly and neatly applying ink to a numbering cylinder incorporated in place of a rubber cylinder of an offset printing unit.

Means for Solving the Problems The means for solving the problems of the present invention is that the rubber cylinder of an offset printing unit, which has a plate cylinder, a blanket cylinder, an impression cylinder, an inking device, and a dampening device as main components, is a numbered cylinder. It is replaced with a cylinder, and the first cylinder in the inking device is
an ink applicator roller, a direct line of ink rollers belonging to the ink applicator roller, and a transfer roller;
The inking device, dampening device, and plate cylinder have been removed, leaving the ink fountain, and two inking rollers and four intermediate rollers in contact with the numbering cylinder have been newly installed, allowing offset printing. The ink fountain, the transfer roller, the first ink applicator roller, the direct line of ink rollers belonging to the ink applicator roller that were present in the unit from the beginning, and the newly installed four intermediate rollers and two ink applicator rollers. This constitutes an inking device that applies ink to the numbering cylinder, and of the four newly installed intermediate rollers, three intermediate rollers are
The three dampening rollers of the dampening device are supported on the bearings in which they were previously supported, and the diameter of the two newly installed inking rollers is smaller than the diameter of the numbering cylinder, and is an integral number of the diameter of the numbering cylinder. It means that it has a value different from 1/1.

Effect of the invention The effect of the invention is that by configuring the numbering printing unit in a tandem type offset printing machine using offset printing units, it is possible to print a tandem type offset printing machine consisting of a number of offset printing units and one numbering printing unit. By standardizing the appearance of offset printing presses and using the components of mass-produced offset printing units to manufacture numbering printing units, it has become possible to reduce the price of numbering printing units. Furthermore, rather than replacing the plate cylinder of the offset printing unit with an inker blanket cylinder of the same diameter, the plate cylinder is removed and four intermediate rollers and two ink rollers are installed between the inker roller and the numbering cylinder of the offset printing unit. The diameter of the two ink forming rollers in contact with the numbering cylinder is smaller than the diameter of the numbering cylinder.
Moreover, it is an integer fraction of the diameter of the numbering cylinder.
By selecting a value that is different from , the type on the numbering cylinder will not hit the same spot on the ink form roller, the rubber cloth of the ink form roller will be less likely to be damaged, and this will result in uniform and clean ink on the numbering cylinder. Application is now guaranteed, and the service life of the ink applicator roller is significantly longer than that of an ink applicator cylinder having the same diameter as the numbering cylinder.
In addition, four intermediate rollers and two ink forming rollers are newly arranged between the ink forming roller and the numbering cylinder of the offset printing unit, which increases the number of places where the ink film is divided into two, making it possible to obtain a uniform ink film. A thin ink film can now be obtained. Furthermore, by mounting the three intermediate rollers on the bearings on which the dampening rollers of the dampening device of the offset printing unit were mounted, it is no longer necessary to provide special bearings for these three intermediate rollers. or,
In the numbering printing unit of the present invention, not only an inking blanket cylinder is provided in place of the plate cylinder, but also a part of the inking device and the dampening device are removed, so the cost of the numbering printing unit can be offset. The cost is considerably lower than that of a printing unit.

The invention will now be explained with reference to the drawing: Between the side machine frames 1 of the offset printing unit, which are arranged side by side with other offset printing units, the sheets to be printed are transferred via transfer cylinders 2, 3 to the impression cylinder. 4, where it is printed in a known format. The sheet is then transferred to the next transfer cylinder 5.
from there to the next offset printing unit or paper delivery unit.

In the drawing, a numbering cylinder 6 is arranged instead of the rubber cylinder. In this case, the form cylinder 7 is eliminated, and only the drive gear is mounted there on a bearing pin on the outside of the side machine frame 1.
The sheets to be printed are printed directly between the impression cylinder 4 and the numbering cylinder 6.

The numbering cylinder 6 is inked by an ink dispenser roller 8 and a transfer roller 10 placed in an ink fountain 9 already installed in the offset printing unit.
and a mixing roller 1 having an ink roller 14 therebetween.
1, 12, 13, and the first one viewed in the direction of rotation of the plate cylinder 7.
This is done via the inking roller 15.
The ink is then transferred to four intermediate rollers 16, 17, 1
8 and 19 to the two inking rollers 20 and 21 which are in contact with the numbering cylinder 6. Ink forming rollers 20, 2 as shown in the figure.
The diameter of the numbering cylinder 6 is smaller than the diameter of the numbering cylinder 6, so that the rubber cloth of the inking rollers 20, 21 will not be damaged due to the printed characters of the numbering cylinder 6 hitting the same location of the inking rollers 0, 21. It is chosen to have a value different from an integral fraction of the diameter of the numbering cylinder.
The three intermediate rollers 17, 18, 19 are the dampening device 2
The three dampening rollers of No. 3 are supported on the bearings on which they were supported. In this case, the intermediate roller 18 is designed as a kneading roller.

Of the intermediate rollers 16, 17, 18, 19 and the ink applicator rollers 20, 21, the intermediate roller 16 and the ink applicator rollers 20 and 21 are additionally attached to the side machine frame 1 via bearings. Instead, the plate cylinder 7 and the inking roller group shown by the dashed line of the inking device 22 above it,
The dampening device 23 with water bottle has been removed. By removing the group of inking rollers shown by the dashed line in the inking device 22, the surface of the numbering cylinder 6 can be easily accessed by the operator.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
FIG. 2 is a side view of an inking device that utilizes dampening roller bearings. 1...Side machine frame, 2...Transfer body, 3
...Transfer cylinder, 4...Impression cylinder, 5...Transfer cylinder, 6...
Numbering cylinder, 7... plate cylinder, 8... ink dispenser roller, 9... ink fountain, 10... transfer roller, 11... kneading roller, 12... kneading roller, 13... kneading roller, 14... ink Roller, 15... Ink forming roller, 16... Intermediate roller, 17... Intermediate roller, 18... Intermediate roller, 19... Intermediate roller, 20... Ink forming roller, 21... Ink forming roller, 22... Inking device, 23... dampening device.

Claims (1)

[Scope of utility model registration request] The main components are a plate cylinder 7, a blanket cylinder, and an impression cylinder 4.
The rubber cylinder of the offset printing unit, which has an inking device 22 and a dampening device 23, has been replaced with a numbering cylinder 6, and of the inking device 22,
The inking device 22 and the inking roller 15 are connected to the inking device 22, leaving the first ink applicator roller 15, the direct ink roller row belonging to the ink applicator roller 15, the transfer roller 10, and the ink fountain 9 when viewed in the direction of rotation of the plate cylinder 7. Moistening device 23
and the plate cylinder 7 have been removed, and the two inking rollers 20, 2 in contact with the numbering cylinder 6 have been removed.
1 and four intermediate rollers 16, 17, 18, 19 are newly arranged, replacing the ink fountain 9, transfer roller 10 and first ink form roller 15 which were present in the offset printing unit from the beginning. A direct line of ink rollers belonging to the ink form roller 15 and four newly arranged intermediate rollers 16, 1
7, 18, 19 and two ink forming rollers 20,
21 constitutes an inking device that applies ink to the numbering cylinder 6, and among the four newly installed intermediate rollers 16, 17, 18, 19, three intermediate rollers 17, 18, 19, The three dampening rollers of the dampening device 23 are supported by the bearings on which the three dampening rollers were previously supported, and the diameter of the two newly installed inking rollers 20 and 21 is smaller than the diameter of the numbering cylinder 6. Numbering printing unit in a tandem offset printing press having a value different from an integral fraction of the diameter of the cylinder 6.