JPS5970572A - Manufacture of printing plate - Google Patents

Abstract

PURPOSE:To form a printing plate with a copying equipment requiring no special plate making equipment by forming a plate of a manuscript expressed depending on the presence of lipophilic substance on a hydrophilic paper. CONSTITUTION:A manuscript is set at a reading section of a thermal copying equipment and a thin hydrophilic paper 1 having a thin layer of an lipophilic substance 2 on one side thereof and a plain paper 4 stacked on the side of the lipophilic substance thereof are so set that the side of the hydrophilic paper gets tight on a thermographic head 6 at a recording section of a thermosensitive copying equipment. According to a reading signal generated by a reading section, heat is applied selectively with a thermographic head 6 to the hydrophilic paper 1 so that the lipophilic substance 2 at parts receiving the heat is transferred onto the plain paper 4. Thus, a plate of said manuscript expressed depending on the presence of the lipophilic substance is formed on the hydrophilic paper 1. A sheet 3 is taken out of the thermal copying equipment and the plain paper 4 is peeled off whereby a plate of a manuscript is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a simple method for manufacturing a printing plate, and particularly to a method for manufacturing a lithographic plate using a thermal copying apparatus (r).

Copying machines (or copying devices) have made remarkable progress in recent years, and although a small number of copies are often made using such a copying machine, when a large number of copies are made, it is necessary to reduce the cost of making copies. A copy is created by printing. There are various methods for printing.High-speed printing is advantageous when there are a large number of copies, but when there are only a small number of copies, it is not a very good method because it increases the cost of equipment (1 unit cost, etc.). do not have.

In this way, a simple printing method can be used to print a relatively small number of sheets.

In general, printing can be broadly classified into letterpress, lithography, intaglio, and stencil printing, but a simple printing method is called garihanzuri, which is a type of stencil printing. This is a method of making a plate by placing the base paper on a file-like board and writing characters, etc. on the base paper with an iron pen, and is widely used as a simple printing method.

In this way, there are relatively many uses for printing in small numbers, and there is a need for a simple printing method or a method for manufacturing printing plates.

An example of a conventional and simple method for manufacturing a lithographic plate is a method using the above-mentioned plate manufacturing apparatus for a gully plate. This device employs a discharge recording method, and consists of a document reading section and a recording section. The document reading section optically reads the document and converts it into an electrical signal, and the recording section generates an electrical discharge between a thin sheet of plastic (base paper) and a recording needle such as a tungsten needle, creating a hole in the sheet. A nine-plate version is created by the user.This device eliminates the complicated operation of cutting the so-called gully plate, and automatically produces a plate of the original recorded on plain paper.

If such a simple plate manufacturing method were possible, it would be possible to produce a large number of printed matter at a lower cost than to produce a large number of copies using a copying machine, so it would have a wide range of uses. However, this conventional method has the disadvantage of requiring special plate manufacturing equipment.

An object of the present invention is to provide a method for manufacturing printing plates that can be performed using a copying machine without requiring a dedicated plate manufacturing device.

The configuration of the method for manufacturing a printing plate according to the present invention is such that an original is set on the reading section 9 of a thermal copying device, and a 1/ii of a lipophilic substance is
A thin hydrophilic paper with I formed on one side and plain paper stacked on the lipophilic substance side are set so that the hydrophilic paper side is in close contact with the thermal recording head of the recording section of the thermal copying device, Heat is selectively applied to the hydrophilic paper by the sensitive recording head in accordance with the read υ signal generated by the reading unit, and the lipophilic substance in the heated area is transferred to the plain paper, and the lipophilic substance is transferred to the plain paper. The present invention is characterized in that a version of the manuscript represented by the presence or absence of a caustic substance is formed on the hydrophilic paper.

The plate thus produced is such that the remaining part of the lipophilic material is receptive to oil-based ink.

The area from which the lipophilic substance has been removed becomes hydrophilic, and if moisture is applied just before printing, oil-based ink will not adhere to it.

Therefore, normal planographic printing can be performed using this plate. The thermal recording facsimile machine, which is currently widely available on the market, is equipped with a copying function in which the transmitting section reads the original and the receiving section records the image of the original.

Therefore, by using the heat-sensitive recording type facsimile machine Kongo as the above-mentioned heat-sensitive copying machine, the above-mentioned printing plate can be easily manufactured.1 The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic diagram for explaining one embodiment of the present invention. In this embodiment, capacitor paper 1 is used as a thin hydrophilic paper, paraffin wax 2 is used as a lipophilic substance, and the paraffin wax 2 is applied to the capacitor paper 1 to form a sheet 3.

The capacitor paper 1 is a hydrophilic film.

Furthermore, it is relatively hard to tear, making it most suitable as a so-called base film. Paraffin wax 2 is lipophilic and has a melting point of 50'0 to 80'O.

Suitable for general thermal copying equipment.

Plain paper 4 is stacked on the paraffin wax 2 side of the sheet 3 and loaded between the press roller 5 and the thermal recording head 6 of the recording section of the thermal copying apparatus.

The original is set to read 9 copies of the thermal copying device. After these preparations, the thermal copying device is operated (if the thermal copying device is also used as a facsimile machine, after switching the device to copy mode) and a thermal image of the document is formed on the sheet 3. The melted paraffin wax 2 is transferred onto the plain paper 4 in accordance with the above.

In this way, an image of the original is formed on the sheet 3 depending on the presence or absence of the paraffin wax 2. When the sheet 3 is removed from the thermal copying device and the plain paper 4 is peeled off, a version of the original is completed.

FIG. 2 is a plan view showing an example of a plate manufactured by the method described above. The upper surface of the plate 7 is formed by a base part 9 where the paraffin wax 2 remains and a removed part 8 where the paraffin wax 2 is removed and the capacitor paper is exposed.

The printing ink used for this plate 7 does not need to be limited to 1% as long as it is used in normal lithographic printing and does not dissolve paraffin wax. , as opposed to the normal lithographic printing method.
Immediately before printing, a small amount of water is supplied to the plate 7, and then a layer of ink is applied and the printing paper is pressed against it.

As described above, according to the present invention, it is possible to provide a method for manufacturing a printing plate using a thermal copying apparatus widely distributed in the market without requiring a dedicated plate manufacturing apparatus.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram illustrating an embodiment of the plate manufacturing method according to the present invention, and FIG. 2 is a plan view showing an example of the plate obtained in this embodiment. 1...Codenza paper, 2...Paraffin wax, 3...Sheet, 4...
Plain paper, 5...press roller, 6...to heat sensitive recording, 2...plate, 8...paraffin wax removal section, 9...base part. What Liang 1 Figure 7

Claims (1)

[Claims] A document is set on the reading section 9 of a thermal copying device, and a thin hydrophilic paper with a thin layer of an oleophilic substance formed on one side and plain paper overlaid on the oleophilic substance side are placed on top of each other, with the hydrophilic paper side facing the The hydrophilic paper is set to be in close contact with the thermal recording head of the recording section of the thermal copying equipment, and the thermal recording head selectively applies heat to the hydrophilic paper in accordance with the reading signal generated by the reading section. Production of a printing plate, characterized in that the lipophilic substance in the heated area is transferred to the plain paper, and a version of the manuscript represented by the presence or absence of the lipophilic T1 substance is formed on the hydrophilic paper. Method.