JPH0473709B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stencil plate making method that can reliably automatically make a stencil in the printable area of the stencil paper without using a special stencil making machine when making a stencil for a stencil paper installed in a stencil printing machine. It is something.

(Background of the present invention and problems to be solved) Since stencil paper (hereinafter simply referred to as base paper) has various dimensional configurations depending on the printing machine model and drum, etc., there are special base papers and plate making for specific printing machines. A machine was needed.

To explain the structure of a normal base paper with reference to FIG. 1, the base paper for plate making 1 is composed of a selvage paper 2 and a thermal paper 3, and 4 is the printable area determined by the printing machine, that is, the area to be plate-made. .

Reference numeral 5 indicates the position where the plate-making is to be started, 6 is the position where the plate-making is to be finished, and 7 is the final edge of the base paper. Looking at the values of X1 and X2 for 16 types of commercially available base paper,
The minimum value of is 72mm, the maximum value is 109mm, the minimum value of X2 is
319mm, the maximum is 362mm, and various sizes are manufactured in between.

Therefore, it is impossible in principle to apply colored markings or the like to the heat-sensitive portion of the heat-sensitive perforated base paper.

Therefore, if the plate-making machine at hand is not compatible with the printing machine being used, conventionally the plate-making start position and plate-making area were set by calculation, but this operation is cumbersome and is not generally carried out. Nakatsuta.

(Objective) The present invention provides a plate making method that can reliably make plates for each applicable base paper without being limited to the type of printing press to be used.

(Configuration) The present invention provides a position sensor that detects the leading edge of a passing base paper along the base paper feed path of a plate-making machine, and a base paper type determination means provided in advance at a predetermined location on the edge of the base paper, which is separated by a corresponding distance. In this method, a plurality of determination sensors are provided at different positions, and based on logical outputs from these sensors, plate making is automatically performed only in the printable area of the passing base paper.

This makes it possible to use one plate-making machine to make stencil sheets for many types of printing machines, making it possible to use a common plate-making machine, and thus making it extremely easy to create questions, edit layouts, etc.

(Example) The base paper 1 applied to the present invention has through holes 8-1, 8-2, and 8-3, which serve as type determination means, at positions Y apart from the leading edge 2a in the edge paper 2 in the width direction of the base paper. Selectively perforated in a row. Note that the actual selvage paper has a large number of holes for mounting the drum (not shown in the figure), but the plurality of through holes 8 are located in the display area 9.
They are distinguished from mounting holes because they are drilled in a fixed relationship.

In FIG. 2, reference numeral 11 indicates determination sensors, and three determination sensors are provided corresponding to the positions of the through holes 8. 12 is a position sensor, 13 is a platen roll, and 14 is a thermal line head. 15 is a drive roll, 16 is a feed roll, and 17 is a pinch roll 18 is a base paper confirmation sensor.

The base paper 1 is fed along the base paper feed path 10, and is moved to the pick-up roll 16 by the signal from the sensor 18.
Then, the feed roll 15 is operated to feed the base paper.

At this time, no print output is applied to the thermal head 14.

When the leading edge 2a of the raw paper passes over the determination sensor 8, the feed roll 16 is released and the drive roll 15 is driven to transport the raw paper at a constant speed.

After that, the position sensor 12 detects the edge paper tip 2a, and at the same time the determination sensors 11-1, 11-2, 11
-3 detects the through holes 8-1, 8-2, and 8-3, respectively, so when the base paper has been fed a predetermined distance from that time, that is, when it has passed the plate-making start position of the base paper, based on this logic output, Print output is applied to the thermal head.

The platemaking start position is X1−{(364−X2)/2}+2
(mm) is normal.

This printout continues in synchronization with the transport speed of the base paper until the plate-making end position 6 of the base paper.

Therefore, if the number of through holes 8 is 2, it will be possible to distinguish between 4 types of base paper, and when there are 3, it will be possible to distinguish between 8 types of base paper, and if only a few mm are allowed, all commercially available products can be distinguished. The base paper can be controlled. Note that the determination means does not need to be a transparent hole, and may be a reflective mark or other detectable means.

(Effects) In the present invention, the plate making machine itself determines the size type of the base paper and automatically makes the plate only in the printable area, so not only plate making work but also editing becomes extremely easy.

In addition, according to the present invention, since the type of rotary press does not matter, schools and the like can purchase only a variety of rotary presses according to the purpose of printing, etc., and there is no need to install a dedicated plate-making machine as in the past, making it economical. It is true.

[Brief explanation of the drawing]

Figure 1 is a plan view of the base paper applied to the present invention;
The figure is a conceptual diagram of a plate-making machine. 4 is a printable area, 8 is a through hole, 9 is a display area, 1
1 and 12 are sensors.

Claims (1)

[Claims] 1. The base paper is provided with a base paper type determination means in a display area that is provided in advance at a predetermined distance from the edge of the base paper, and the edge of the base paper is detected along the base paper feed path of the plate-making machine. a position sensor and a plurality of sensors provided apart from each other by a distance from the edge of the base paper to the base paper type determining means, and determining the printable area of the passing base paper based on logical outputs of these sensors; A method for making a base paper in stencil printing, characterized in that the plate is automatically made only in the printable area.