JPH0564871A - Production of pressplate - Google Patents

Abstract

PURPOSE:To produce various types of pressplates in a simple and rapid manner by using a cutting system consisting of an image scanner, a personal computer, and a cutting plotter, and an enlarging/reducing printing machine. CONSTITUTION:A sheet in use is obtained by coating a surface of a light- transmitting sheet with a light-shielding filter film which interrupts a beam of light from a light source of a printing machine. Using a cutting system, the sheet is cut into characters or the like to be formed on a pressplate after the dimension of the characters is enlarged or reduced to a set magnification. Next, a negative sheet is obtained by releasing a part of the film corresponding to the characters or the like from the cut sheet, or a positive sheet is obtained by releasing a non-character part other than the character part of the film. This negative or positive sheet is put into an enlarging/reducing printing machine, whereby the characters or the like are printed on a plate material with a magnitude adjusted to a required dimension. In this manner, a relief printing plate, a waterless lithographic plate used for printing marks on electronic parts, and the like can be produced in a simple and rapid manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting system comprising an image scanner, a personal computer and a cutting plotter, a sheet for cutting characters, symbols, figures and the like (hereinafter referred to as characters) by the system, and a large scale reduction. The present invention relates to a method for producing a printing plate, which enables an extremely simple and quick production of various printing plates using a printing machine.

Further, the present invention mainly relates to a method for producing a printing plate, which is capable of producing a printing plate for waterless lithographic printing used for marking printing of electronic parts extremely simply and quickly.

[0003]

[Prerequisite technology of the present invention] Currently, printing of standing signboards and other signboards such as supermarkets, shops, etc., banners and hanging films for various events, promotional leaflets, etc. is a conventional printing plate manufacturing means, that is, typesetting. , As a means for performing very easily and immediately when necessary, without relying on specialized techniques, equipment, procedures, etc. such as plate making, camera shooting and its processing, etc.
The sheet has a cutting system to cut letters and provide a negative sheet or a positive sheet, which is thermally transferred to the screen to create a screen printing plate.
Screen printing of signboards and the like using the same is extremely easy in some parts of the industry.

Explaining the above in detail, a cutting system (commercially available product, for example, trade name POP199, distributor,
Sakurai Co., Ltd.) consists of an image scanner, a personal computer, a cutting plotter, etc., and a plastic film (usually a transparent thick sheet) on one side of which a peelable plastic film (usually a colored transparent film that can be distinguished during peeling work,
However, there is no translucent filter performance in the present invention described later. ) Is coated on the sheet, and characters etc. edited and created using an image scanner and a personal computer are cut by a cutting plotter, and only the film of the sheet is cut according to the outline of the characters etc. ,

[0005] A negative sheet is provided by peeling off the coating of the characters and the like from the cut sheet, or a positive sheet is provided by peeling the coating of the base portion while leaving the characters and the like,

The negative sheet or positive sheet is brought into contact with the screen, and only the coating film portion is thermally transferred (heated and adhered) to the screen to prepare a screen printing plate (negative or positive), which is used. The above-mentioned signboard etc. are printed.

Currently, editing and creation of characters and the like using a commercially available system is highly flexible according to the performance of the image scanner and personal computer, and the cutting plotter can handle a maximum sheet width of 45 cm and a length of 300 cm.

[0008]

2. Description of the Related Art Conventionally, various electronic parts have been marked with a manufacturer's mark, a part symbol, a type, a capacity, and other characters by a printing means. However, even the same kind of electronic parts have different details. There are a large number of types, especially when marking such as characters that change from period to period is required, even if other characters are common, the date part needs to be different every day. Therefore, an electronic component manufacturer or the like needs an extremely large number of printing plates for each type of electronic component, and when the manufacturing date is entered, for example, each printing plate is printed for 30 sheets for one month. It was made to be delivered to a plate making company in advance, and the dated printing plate was extremely uneconomical as it was unnecessary and discarded without being used on the day.

The production of the printing plate requires specialized techniques and equipments as described below, and is troublesome.
Since electronic parts makers cannot do it themselves, they have no choice but to ask specialized plate makers, and due to the above-mentioned problems, it is costly and requires a promising manufacturing request, which takes days. Therefore, there was also a problem that it was not possible to respond to urgent needs such as the same day.

On the other hand, when a plate making company receives an order from an electronic component maker or the like, first, by making a photoset, a plate having a set magnification (for example, 5 times, 10 times) of the size of the target printing plate is prepared,

The block copy is set to a reduction ratio (eg, 1/5, 1/1).
0, that is, the size of the target printing plate), shoot a camera to create a negative film,

When a positive film is prepared from the negative film to correct characters and the like, and an intaglio printing plate is provided, the positive film is closely adhered to the plate material (1: 1) to provide the intaglio printing plate,

When a planographic or relief printing plate is provided, a negative film is prepared again from the corrected positive film, and the negative film is adhered and baked (1: 1) to provide the planographic or relief printing plate.

As described above, the conventional printing plate manufacturing requires specialized techniques and equipments such as plate making, camera photographing and processing, and therefore cannot be directly manufactured by an electronic parts manufacturer. Further, from the viewpoint of the plate-making company, there is a problem in that even if the date is different and the others are the same, they must be produced as separate items through the above steps.

Further, since the characters and the like are corrected at the time of positive, that is, at the stage when the size of the printing plate has already been set, the characters and the like are minute (the size of one character,
For example, in the case of 0.4 mm in height and 0.8 mm in width), it is impossible to correct, and there is a problem that the precision of the printing plate remains uncertain.

[0016]

SUMMARY OF THE INVENTION Therefore, the present invention is mainly aimed at solving the problems for marking electronic parts in the electronic parts makers and the like and the problems of the conventional plate making method which cannot meet the problems. It was

Particularly, the plate-making process requires specialized technology, equipment and labor, which has been an obstacle for electronic parts makers to carry out plate-making by themselves. "Camera photographing and associated process step" Without the above, as a method capable of making a plate, the plate making method of the present invention is developed by the above-mentioned cutting system which is currently being used for the simple production of a screen printing plate, and a conventionally widely used enlarging / reducing printing machine. ..

[0018]

That is, the present invention relates to a sheet obtained by coating a light-shielding filter film on one side of a translucent sheet with a cutting system including an image scanner, a personal computer, a cutting plotter, etc. Cut the characters etc. of the size etc. to the set magnification (including the same size) and peel off the coating of the part of the characters etc. from the cut sheet, or provide a negative sheet, or Leave it, peel off the coating on the ground part and provide a positive sheet,

According to a method for producing a printing plate, the negative sheet or the positive sheet is subjected to an enlarging / reducing printing machine to enlarge / reduce the characters or the like to a desired size on the plate material and printed to provide a printing plate. The above-mentioned conventional problems are solved.

The sheet used in the above method is a translucent sheet coated with a light-shielding filter film for blocking the light source of the printing machine, because it is necessary to apply it to a scaling printing machine.

The negative sheet is subjected to a scaling printing machine to print it on a plate material for relief printing or a plate material for lithographic printing, whereby a relief printing plate or a lithographic printing plate can be produced.

Further, the negative sheet is subjected to a scaling printing machine to print it on a plate material for waterless lithographic printing.
Waterless lithographic printing plates can be produced. The production of this waterless lithographic printing plate is the main object of the present invention.

Further, an intaglio printing plate can be manufactured by applying a positive sheet to an enlarging / reducing printing machine and printing it on an intaglio printing plate material.

[0024]

[Effect] The method of the present invention can be achieved by simply using a cutting system including an image scanner, a personal computer and a cutting plotter, a sheet used for the cutting system, and a scaling printer.
Since there is no need for conventional camera photography and its processing steps, anyone has the excellent feature that various printing plates can be easily and quickly manufactured without specialized technology and equipment.

In particular, a printing plate for waterless lithographic printing plate which is most suitable for marking printing of electronic parts is prepared by the conventional technical technique as described above.
Anyone can easily and quickly manufacture it without the need for equipment,
For example, an electronic component manufacturer can prepare the cutting system and sheet necessary for the present invention, create a negative sheet by himself, and print it on an enlarging / reducing printing machine to produce a negative sheet. There is no need to ask a specialist.

Further, since the work corresponding to the conventional block making can be freely performed by the image scanner and the personal computer,
For example, it is possible to freely change the marking part of electronic parts, so even if you change the date every day, you only need to input the change of the date part and immediately respond to the urgent need, A printing plate can be provided freely.

For a printing plate having a large size of characters, etc., a negative sheet or a positive sheet having a size in which the size of characters or the like is reduced to a set magnification of the size of the target printing plate is cut, and the cut sheet is subjected to a scaling printing machine to obtain the target size. It can be enlarged and printed on the target printing plate.

In particular, when manufacturing a printing plate in which the size of characters and the like is extremely small (eg, vertical 0.4 mm, width 0.8 mm), such as marking of electronic parts, the size of characters and the like is intended. Enlarged to the set magnification of the size of the printing plate (eg 5 times, 10 times
Double the size of the negative sheet and apply it to the enlargement / reduction printing machine to reduce it to the set magnification (eg 1/5, 1/10)
Since it can be produced by printing, it can be easily modified at the negative sheet stage unlike the prior art, and there is also an advantage that a minute and highly precise printing plate can be produced because it is reduced and printed.

Claims (5)

[Claims] 1. A sheet of which a light-shielding filter film is coated on one side of a translucent sheet by a cutting system including an image scanner, a personal computer, a cutting plotter, etc. Cut characters, symbols, figures, etc. of the size enlarged and reduced to the set magnification and peel off the coating of the characters, symbols, figures, etc. from the cut sheet to provide a negative sheet, or A negative sheet or a positive sheet is provided on a negative sheet or a positive sheet by an expansion / reduction printing machine by adjusting the letters, symbols, figures, etc. to a desired size and printing on the printing plate, leaving a portion of the printing plate. A method for producing a printing plate, characterized in that 2. The sheet is a translucent sheet coated with a light-shielding filter film for blocking light rays of a light source of the printing machine, because it is necessary to apply it to a scaling printing machine. Printing plate manufacturing method. 3. The printing plate according to claim 1, wherein the negative sheet is subjected to a scaling printing machine and baked onto a printing plate material for relief printing or a printing plate material for lithographic printing to provide a relief printing plate or a lithographic printing plate. Manufacturing method. 4. The method for producing a printing plate according to claim 1, wherein the negative sheet is subjected to a scaling printing machine to print it on a plate material for waterless planographic printing to provide a waterless planographic printing plate. 5. The method for producing a printing plate according to claim 1, wherein the positive sheet is subjected to an enlarging / reducing printing machine to print it on a plate material for intaglio printing to provide an intaglio printing plate.