JPH0154194B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stencil recording method for heat-sensitive stencil paper, and particularly to a stencil recording method for creating a stencil from an electrical signal such as a facsimile signal.

Conventionally, among the methods of making plates for factory printing from facsimile signals, there is a method of making mimeograph paper by applying electric discharge breakdown recording technology. This will be described using the explanatory diagram of FIG. 1 during plate making. The base paper 1 has a structure in which a surface recording layer 1b is provided on a conductive film 1a, and a power source 4 is connected between the electrodes 2 and 3 in response to an electric signal, for example, in the case of a black signal. The voltage necessary for discharge is applied by the switch 5 corresponding to the electric signal, and the surface recording layer 1b and the conductive film 1a are made with minute holes by the discharge current.If it is a white signal, the switch 5 is opened to prevent holes from being made. It's summery. When ink is placed on the mimeograph paper made in this way and placed on top of the paper, the ink passes through the perforated areas 1 and is transferred to the paper, while in the non-perforated areas the paper remains as it is, and the printing is no longer possible. It is done.

Furthermore, among the conventional methods for making plates using heat-sensitive stencil paper, there is a method using heat-sensitive copying technology. This principle will be explained with reference to FIG. Generally, the heat-sensitive stencil paper 21 is formed into a layer by coating a thermoplastic material 21b such as polyethylene on a porous thin paper 21a made mainly of natural fibers or chemical fibers, to which the original 22 is tightly attached. When the irradiation lamp 23 containing infrared rays is turned on,
Taking advantage of the difference in temperature rise between the black area 22a and the white area of the original, the thermoplastic material in the area in contact with the black area is condensed or attached to the original to form perforated areas 21' on the original paper. It is used for printing and plate making.

However, the conventional discharge breakdown recording method as described above has the following drawbacks. In other words, it generates smelly gases, smoke, and the material removed from the recording area of the paper comes out as dregs, which is not sanitary.

Since it is based on a discharge phenomenon, the electrodes are subject to severe wear and maintenance problems.

Furthermore, stencil making using thermal copying has the following inconveniences.

Since it is just a copying technology, it is not possible to make plates directly from image information sent as electrical signals.

Generally, since the base paper is placed between the original and the light source, the base paper must be thin and transparent, making it difficult to check the perforation state with the naked eye.

It is difficult to adjust the exposure amount according to the density of the original.

The present invention has been made in view of these conventional drawbacks, and an object thereof is to provide a stencil recording method that is hygienic, easy to maintain, and can be perforated with a thermal recording type facsimile receiver. shall be.

The present invention perforates heat-sensitive stencil paper using the heat of a heating element, instead of using the original method of perforating it using infrared heat contained in irradiated light.
In particular, it is characterized in that a medium is provided between the heat-sensitive stencil paper and the heating element. This method
If it is applied to a heat-sensitive recording type facsimile receiver for stencil making, it will be possible to perform stencil making that is superior in terms of odor, smoke, generation of scum, and electrode wear, which are the disadvantages of the conventional discharge destruction method. It has the advantage of

Embodiments of the present invention will be described below with reference to FIG. The heat-sensitive stencil paper 31 has a structure in which a conventionally used thermoplastic material 31a such as polyethylene is coated on a porous thin paper 31b to form a layer, and as described above, the original plate-making process is performed. The process involves irradiating light containing infrared rays and absorbing more infrared rays, melting the thermoplastic material only in the black areas where the temperature is high, condensing it, or attaching it to the manuscript and removing it. However, according to the present invention, the heating element, for example, the power source 3
It becomes possible to create perforated portions 31' in the heat-sensitive stencil paper only when current is passed through the heat-generating resistor 33 which generates heat with the current supplied from 4 and the switch 35.
If the power supply 34 is driven by a semiconductor switching element instead of the switch 35, an electronic plate-making process for making the heat-sensitive stencil paper using electric signals can be realized. Furthermore, instead of using only one heating element, if you use a large number of heating elements arranged in a line with a size that satisfies the required resolution and a length that corresponds to the required width, for example, the recording head of a thermal recording type facsimile receiver, it is possible to A method that does not require mechanical scanning can be realized.

In the case of thermal copying, a nearly transparent heat-sensitive stencil paper is used because of the need to transmit light, so it is difficult to see the perforations with the naked eye and it is relatively difficult to observe the progress of the plate making. The use of an opaque or colored thermoplastic material or porous thin paper in the method of the present invention in which holes are made using a heating element has the advantage that the state of the holes can be easily confirmed.

Hereinafter, the characteristic parts of the present invention will be explained in detail.

Normally, if the thermoplastic material of the heat-sensitive stencil paper is brought into direct contact with the heating element, this material will adhere to the heating element, and the perforation ability may deteriorate as the paper is used. This problem can be solved by interposing paper 32 as a medium between the heat-sensitive stencil paper and the heating element.

That is, as shown in FIG. 3, between the thermoplastic material of the heat-sensitive stencil paper 31 and the heating element 33,
A paper 32 is provided as a medium that moves in the direction of the arrow, and as the paper 32 moves, the thermoplastic material of the heat-sensitive stencil paper 31 that becomes unnecessary is attached to this medium and removed. In other words, this medium
Since the heat generating element 33 is prevented from adhering to unnecessary thermoplastic substances (residues), the heat generating element 33 is always clear and the recording quality is not deteriorated.

When plate-making is performed in this way, some of the thermoplastic material in the area where heat is applied will adhere to the paper sandwiched between them and be removed from the porous thin paper, so plate-making can be performed without sandwiching the paper. You will get a better quality stencil than if you had done it.

Here, the paper 32 has two functions; one is to connect the heating element and the heat-sensitive stencil paper 31 to the paper 32;
2, the other is the function of making contact state through
Although it can transmit heat, it functions to keep the heating element and the heat-sensitive stencil paper 31 out of mechanical contact. Of course, if it has both of these functions, it is not limited to paper.

In the above embodiment, a case was described in which a base paper for a mimeograph was used, but the present invention is applicable not only to mimeograph but also to stencil printing in general. For example, a plate-making method in silk screen printing generally uses a photosensitive emulsion, but according to the present invention, by using a heating element, it is also possible to make a plate directly from an electric signal.

In the above embodiments, the heat generating element may be a heat generating element other than a heat generating resistor, for example, a heat generating element that generates heat by collector loss of a transistor.

As described above, the present invention has the following effects.

By sandwiching a medium between the heating element and the thermoplastic material of the heat-sensitive stencil paper, the thermoplastic material is prevented from adhering to the heating element, which not only prevents deterioration of the plate-making ability but also prevents the thermoplastic material in the perforated area from adhering to the heating element. is removed from the paper, resulting in a high-quality stencil.

Unlike conventional discharge destruction methods, it is possible to create clean stencils that do not produce smoke, odor, or residue.

It is possible to realize electronic stencil printing that requires almost no maintenance.

To realize stencil making using a heat-sensitive recording type facsimile machine as it is without modifying the device.

Unlike thermal copying, there is no need to transmit light, so opaque or colored heat-sensitive stencil paper can be used, and the state of perforations can be easily confirmed with the naked eye.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a conventional stencil-making method, FIG. 2 is an explanatory diagram of another conventional stencil-making method, and FIG. 3 is an explanatory diagram of an embodiment of the present invention. 31... Heat-sensitive stencil paper, 31'... Perforated portion,
31a...Thermoplastic substance, 31b...Porous thin paper, 32...Paper, 33...Heating resistor, 34...
Power supply, 35... switch.

Claims (1)

[Scope of Claims] 1. Perforations corresponding to desired records are created in a heat-sensitive stencil paper in which a thermoplastic substance is coated on a porous thin paper to form a layer, and then the stencil paper on which the perforations have been created is used. , in a stencil recording method for recording, a heating element that generates heat is provided to create the perforation in the heat-sensitive stencil paper, and the heating element is arranged so that it does not come into contact with the heat-sensitive stencil paper. A medium is provided between the thermoplastic material of the heat-sensitive stencil paper and the heating element and moves while contacting the heating element, and the perforation is created by heat from the heating element via the medium. In addition, a stencil recording method characterized in that a thermoplastic substance unnecessary for producing the base paper and performing recording is removed by attaching it to the medium. 2. The stencil recording method according to claim 1, wherein the heating element is formed by arranging a plurality of heating elements in a line. 3. The stencil recording method according to claim 1, wherein the heat-sensitive stencil paper is opaque or colored. 4. The stencil recording method according to claim 1, wherein the medium is paper.