JPS6321417Y2 - - 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 new side machine frames, 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. The first two ink applicator rollers in the inking device as seen in the direction of rotation of the plate cylinder, the direct line of ink rollers belonging to the ink applicator rollers, the transfer roller, and the ink fountain. The inking device, dampening device, and plate cylinder have been removed, leaving the numbering cylinder, and two inking rollers and two intermediate rollers in contact with the numbering cylinder have been newly installed, and the offset printing unit has been replaced with the original one. The ink fountain and transfer roller that existed since then, and the first two ink applicator rollers,
The inking device that applies ink to the numbering cylinder is composed of the direct line of ink rollers that belong to the two ink applicator rollers, the newly installed 24 intermediate rollers, and the two ink applicator rollers. The diameter of the two inking rollers disposed in the ink forming roller is smaller than the diameter of the numbering cylinder and has a value different from an integral fraction of the diameter of the numbering cylinder.

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 offset 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 two intermediate rollers and two ink rollers are installed between the inker roller and the numbering cylinder of the offset printing unit. By newly arranging an ink forming roller and selecting the diameter of the ink forming roller in contact with the numbering cylinder to be smaller than the diameter of the numbering cylinder and different from an integer fraction of the diameter of the numbering cylinder. , the type on the numbering cylinder will not hit the same spot on the ink applicator roller, the rubber cloth of the ink applicator roller will be less likely to be damaged, and as a result, even and clean ink application on the numbering cylinder will be guaranteed, and the ink The service life of the applicator roller is significantly longer than that of the applicator cylinder, which has the same diameter as the numbering cylinder. Additionally, two intermediate rollers and two intermediate rollers are provided between the inking roller and the numbering cylinder of the offset printing unit.
Due to the new arrangement of two ink applicator rollers, the number of locations where the ink film is divided into two increases.
A thin, uniform ink film can now be obtained. Moreover, in this case it is also possible to support one of the newly installed intermediate rollers via the bearing on which the plate cylinder of the offset printing unit was supported. In addition, in the numbering printing unit of the present invention, not only is an inking rubber cylinder provided in place of the plate cylinder, but also a part of the inking device and the dampening device are removed, so that the cost required for the numbering printing unit is reduced. is considerably lower than with offset printing units. Furthermore, two ink applicator rollers remain from the inking device of the offset printing unit, and by bringing one of the newly arranged intermediate rollers into contact with the aforementioned two ink applicator rollers, the intermediate roller can ink the two ink applicator rollers. Since the amount of ink distributed to the two ink applicator rollers from the one kneading roller in front of the applicator roller is received from both ink applicator rollers, the amount of ink distributed to the two ink applicator rollers is distributed between the one kneading roller in front of the two ink applicator rollers and the two ink applicator rollers. In addition to the two ink division points between the ink applicator rollers, two ink division points are provided between the two ink applicator rollers and an intermediate roller arranged after the two ink applicator rollers. Even if the number of newly installed intermediate rollers is relatively small, a relatively large number of ink division points can be obtained, and a thin ink film can now be uniformly applied to the numbering cylinder. .

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.
a kneading roller 11 with an ink roller 14 therebetween;
12, 13, and the first 2 as seen in the direction of rotation of the plate cylinder 7.
This is done via two inking rollers 15, 15'. Both inking rollers 15, 15'
is in contact with an intermediate roller 24, and this intermediate roller 24 is in contact with another intermediate roller 25. The intermediate roller 25 transfers the ink to the two inking rollers 2.
Handed over on June 27th. These two inking rollers 26, 27 apply ink to the numbering cylinder 6. In this case, the intermediate roller 25 may be driven as a kneading roller. intermediate roller 25
It is advantageous to arrange the plate in the center of the plate cylinder in relation to its bearing device.

In the illustrated printing unit, intermediate rollers 24, 25 and ink form rollers 26, 27 are added to the side, instead of the dampening ink roller group and dampening device indicated by the dashed lines of the plate cylinder 7 and inking device 22. placed between the machine frames.

[Brief explanation of drawings]

The drawing is a side view of the inking device of the present invention. 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, 15'... Ink forming roller, 22... Inking device, 24... Intermediate roller, 25... Intermediate roller, 26... Ink forming roller, 27... Ink forming roller.

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 blanket cylinder of the offset printing unit, which has an inking device 22 and a dampening device, has been replaced by a numbering cylinder 6, and the first two inking rollers 15 of the inking device 22, viewed in the direction of rotation of the plate cylinder 7, have been replaced by a numbering cylinder 6. , 15' and the ink forming roller 15, 1
The inking device 22, the dampening device, and the plate cylinder 7 have been removed, leaving the direct ink roller row belonging to the numbering cylinder 5', the transfer roller 10, and the ink fountain 9; two inking rollers 26, 27 and two intermediate rollers 24, 25
The ink fountain 9, the transfer roller 10 and the first two ink applicator rollers 15, which were present in the offset printing unit from the beginning, have been newly installed.
15', a direct line of ink rollers belonging to the two ink forming rollers 15, 15', two newly arranged intermediate rollers 24, 25, and two ink forming rollers 26, 27, and a numbering cylinder. An inking device is configured to apply ink to the rollers 6, and the two newly installed ink rollers 2
A numbering printing unit in a tandem offset printing press, in which the diameters of the numbering cylinders 6 and 27 are smaller than the diameter of the numbering cylinder 6 and different from an integral fraction of the diameter of the numbering cylinder 6.