JP3220916B2 - Spot printing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spot printing method for spot printing several types of patterns, such as replacing a shop name, at a predetermined location of one type of printed matter.

[0002]

2. Description of the Related Art Conventional spot printing methods include the following.
As in the case of general printing, a plate for spot printing is prepared, mounted on a plate cylinder, and overprinted on printed matter printed by separate printing units. When one type of spot printing is completed, the machine is stopped and another plate for spot printing is mounted on the plate cylinder for printing. As another conventional example, a special unit for replacing a store name is known as a non-stop-in printer.

[0003]

In the former of the prior art, the printing machine must be stopped and the plate must be replaced every time one spot printing is completed. It was troublesome.

In the latter case, two plate cylinders are provided opposite to one impression cylinder, and another plate is mounted on the other plate cylinder during printing on one plate cylinder. The plate can be changed without stopping the machine by alternately switching the drive of
Since the plate cylinder, which has been stopped once, is synchronized in phase with the machine rotating at high speed to adjust the phase, an expensive and complicated structure has to be obtained.

The present invention has been made in view of the above, and it is not necessary to attach / detach each plate to a plate cylinder when changing the plate for spot printing, and the change of the plate is complicated. It is an object of the present invention to provide a spot printing method that does not require a mechanism and can easily change a spot plate.

[0006]

In order to achieve the above object, a spot printing method according to the present invention is provided in which spot printing plates 3a, 3b are displaced vertically or axially at a plurality of positions on a peripheral surface. , 3c,..., One plate of the plate cylinder 1 is raised above the other portions and is opposed to a printing pressure unit 4 provided on the impression cylinder, and a printing pressure is applied only to this one spot printing plate. After printing, the printing cylinder 1 is
Is moved in the vertical or axial direction to make another spot printing plate face the printing pressure unit 4 of the impression cylinder 2 to change the spot printing plate to be printed.

[0007]

[Operation] By making the printing pressure part 4 of the impression cylinder 2 face one of the plurality of spot printing plates 3a, 3b, 3c,. Only the spots are printed. When printing another spot printing plate, the other spot printing plate is
The printing cylinder 1 is shifted in phase so as to face the printing pressure section 4. At this time, the phase of the impression cylinder 2 is not changed.

[0008]

[Embodiment] A first embodiment of the present invention will be described with reference to FIG. In the figure, reference numeral 1 denotes a plate cylinder, and 2 denotes an impression cylinder which contacts the plate cylinder 1 and rotates in the opposite direction. The plate cylinder 1 has a plurality of spot printing plates 3a, 3b, 3 to be spot printed.
A plate material 3 provided with c,... On the other hand, the impression cylinder 2 has plates 3a, 3 for spot printing on the plate cylinder 1.
1 of the area corresponding to the area of each plate of b, 3c, ...
Each of the printing pressure portions 4 is provided to be about 0.1 mm higher than the other portions.

In the above configuration, the first spot printing plate 3a of the plate cylinder 2 is opposed to the printing pressure unit 4 of the impression cylinder 2 and paper is passed through the two cylinders 1 and 2, thereby forming the first spot. Only the printing plate 3a is printed. After printing a predetermined number of plates 3a, the second plate 3 for spot printing is then printed.
b, the phase of the plate cylinder 1 is shifted with respect to the impression cylinder 2, and the second plate 3b to be printed is moved to the impression cylinder 2.
The printing is performed in such a manner as to face the printing pressure section 4. In this way, by sequentially facing the printing plates 3a, 3b, 3c,... Of the plate cylinder 1 for the spot printing selectively to the printing pressure unit 4 of the impression cylinder 2, the spot printing plate 3a for an arbitrary spot is formed. , 3b, 3c, ...
Can be spot-printed at a predetermined position on a printed material.

The printing pressure section 4 of the impression cylinder 2 is formed by attaching a film or the like having a thickness of about 0.1 mm to the impression cylinder 2. The printing plates 3a, 3b, 3c,... Are changed by changing the phase of the plate cylinder 1 with respect to the impression cylinder 2 while the printing press is running, or by stopping the printing press. If the printing is performed without stopping the printing press, the waste paper occurs during the phase adjustment, but the occurrence of the waste paper is smaller than that in the method in which the printing machine is stopped and the plate is replaced. This is almost the same as the case of the non-stop-in printer.

FIG. 2 shows a second embodiment of the present invention, in which the plate cylinder 1 is shortened with respect to the impression cylinder 2.
Plates 3a, 3b, 3 for spot printing in the axial direction of
are provided, and by moving the plate cylinder 1 in the axial direction, a predetermined plate is opposed to the printing pressure part 4 provided on the impression cylinder 2. In this embodiment, the impression cylinder 2 is used to change the plate.
Then, the plate cylinder 1 is moved in the axial direction to make a predetermined plate face the printing pressure unit 4 of the impression cylinder 2.

The spot printing method according to the present invention is conveniently applied to a case where only the shop name is printed for each shop on a common slip of the same series, for example, a laundry shop.

[0013]

According to the present invention, a plurality of spot printing plates 3a, 3b, 3c,... Provided in the vertical direction or the axial direction of the plate cylinder 1 are arbitrarily printed at predetermined positions of a printed material. , The spot printing plates 3a, 3b, 3c,... Do not need to be attached to or detached from the plate cylinder 1 at the time of change, and no complicated mechanism is required for plate change. You can easily change the version. Also, a very large number of spot printings can be performed by one set of plate cylinder and impression cylinder.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view schematically showing a relationship between a plate cylinder and an impression cylinder used in a first embodiment of the present invention.

FIG. 2 is an exploded perspective view schematically showing a relationship between a plate cylinder and an impression cylinder used in a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... plate cylinder, 2 ... plate for spot printing, 3 ... plate material, 3a,
3b, 3c,... Design, 4.

Claims (1)

(57) [Claims] 1. Plates 3a, 3b, 3 for spot printing are displaced in a vertical or axial direction at a plurality of positions on a peripheral surface.
c,..., one plate of the plate cylinder 1 is made higher than the other portions and opposed to a printing pressure part 4 provided on the impression cylinder, and printing is performed by applying printing pressure only to this one spot printing plate. Then, the peripheral surface of the plate cylinder 1 is moved in the vertical direction or the axial direction with respect to the printing pressure unit 4 of the impression cylinder 2 to cause another spot printing plate to face the printing pressure unit 4 of the impression cylinder 2. A spot printing method characterized in that a plate for spot printing to be printed is changed.