JPH07290811A - Rotary stencil duplicator - Google Patents

Abstract

PURPOSE:To allow printing without causing creases to a stencil wound to a plate cylinder by drawing a stencil out of a stencil discharge roller and winding it to the cylinder while giving a tensile force to the stencil by the corotation of the stencil discharge roller. CONSTITUTION:When a stencil feed roller 22 is driven for a predetermined duration, a stencil 28 is fed diagonally downward as shown by two-point chain line by a stencil feed roller 22 faced downward and forms a slack downward. When platemaking for one plate length finishes after a lapse of a predetermined period, a stencil drive motor 29 stops and a stencil feed roller 22 stops. At this state, a plate cylinder 21 clamps the leading edge of the stencil 28 in the clamping portion 26 and rotates in the direction of an arrow. At this time, the stencil discharge roller 23 in pause slack-rotates in a stencil transfer direction while giving a tensile force to the stencil 28. The stencil 28 which is slackened by one plate length is discharged from the stencil discharge roller 23 while tensioned properly and wound to the plate cylinder 21, and produces a print of one plate length.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary transcription printing apparatus in which a base paper produced by a plate making section is wound around a plate cylinder to perform rotary transcription printing.

[0002]

2. Description of the Related Art In a conventional rotary transcription printing apparatus, a base paper made by a plate making section is gradually fed horizontally by a base paper feed roller, and its leading end is clamped by a clamper on a plate cylinder of the printing section to make a copy. The base paper was wrapped around the plate cylinder and printed. Further, the plate making section and the printing section were arranged at positions longer than one plate length.

[0003]

In the above-mentioned prior art, since the plate cylinder is connected with the interlocking mechanism such as a cam, it is difficult to obtain a uniform and accurate ultra-low speed because of a large fluctuation during one rotation. This causes uneven rotation, which is transmitted to the plate making section as it is and deteriorates the plate making quality, and there is a problem that wrinkles occur because the copied original paper is wound around the plate cylinder in a loose state. It was

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and a base paper produced by a plate making section is fed by a base paper feed roller toward a base paper discharge roller and a plate cylinder, and the base paper discharge is stopped. Sagging the master paper that was made between the rollers downward, then stop the base paper feed roller,
After clamping the front end of the base paper, rotate the plate cylinder and apply tension to the base paper by wrapping around the base paper discharge roller, pull out the base paper from the base paper discharge roller and wind it around the plate cylinder, and the clamp part and plate making part are within one plate length It is characterized by being placed in.

[0005]

EXAMPLE One example shown in FIG. 1 will be described below. The length between the plate making unit 20 and the plate cylinder 21 of the printing unit should be within one plate length, the raw paper feed roller 22 and the raw paper discharge roller 23 having a one-way clutch are arranged in the raw paper feed path, and the center of the raw paper feed roller 22 is The base paper from the plate making section is arranged to be fed obliquely downward with the connecting direction directed downward from the direction perpendicular to the horizontal direction, and one end is pivotally attached to the pin 24 between the base paper feed roller 22 and the base paper discharge roller 23, An open / close guide plate 25 is provided so as to be rotatable. Reference numeral 26 is a clamp portion of the plate cylinder 21, 27 is a clamp detection sensor for detecting that the front end of the base paper 28 is inserted and clamped in the clamp portion 26, and a clutch (which is connected to the base paper discharge roller 23 by the clamp detection sensor 27 ( (Not shown) is cut off and the base paper discharge roller 23 is stopped. Reference numeral 29 is a base paper drive motor. By receiving the output of the detection means, the driving of the base paper discharge roller 23 is stopped, and the drive of the base paper feed roller 22 is continued for a predetermined time, so that the slack of the base paper is caused between the base paper discharge roller 23 and the base paper feed roller 22. After the predetermined time has elapsed, the plate cylinder 21 is rotated, and the base paper discharge roller 23 having the one-way clutch is loosened and rotated, and the control means (not shown) winds the loose base paper.

Next, an embodiment of the present invention will be described.
After the base paper 28 is made by the plate making unit 20, it is sent to the base paper feed roller 22 and proceeds further. At this time, the opening / closing guide plate 2
5 is in the horizontal position of the solid line and is closed. The base paper 28 passes over the open / close guide plate 25, and the front end of the base paper is inserted and clamped by the clamp portion 26 by the base paper discharge roller 23. The clamp detection sensor 27 detects this, and the base paper discharge roller 2
The clutch (not shown) connected to 3 is disengaged, and the base paper discharge roller 23 is stopped. Opening and closing guide plate 2 at the same time
5 is opened to the lower two-dot chain line position by a solenoid or the like. If the base paper feed roller 22 is driven for a predetermined time in this state,
The base paper 28 is a base paper feed roller 22 that faces diagonally downward.
Is sent obliquely downward as shown by a chain double-dashed line to form a slack downward. When the plate making for one plate length is completed after the lapse of a predetermined time, the base paper drive motor 29 stops and the base paper feed roller 2
The rotation of 2 stops. In this state, the plate cylinder 21 clamps the front end of the base paper 28 on the clamp portion 26 and rotates in the direction of the arrow. At this time, the stopped base paper discharge roller 23 is adapted to give a tension to the base paper by the built-in one-way clutch and loosely rotate in the base paper transfer direction.
The slack stencil paper 28 for one plate length is given an appropriate tension, and is smoothly drawn out from the stencil paper discharge roller 23 to be removed from the plate cylinder 21.
It is wrapped around and printed for one plate length.

[0007]

According to the present invention, the base paper made by the plate making section is fed by the base paper feed roller toward the base paper discharge roller and the plate cylinder, and the master paper made between the stopped base paper discharge roller is lowered. No, then stop the base paper feed roller, clamp the front end of the base paper, rotate the plate cylinder, apply tension to the base paper by the rotation of the base paper discharge roller, pull out the base paper from the base paper discharge roller, and wind it around the plate cylinder.
Moreover, since the clamp part and the plate-making part are arranged within one plate length, it is possible to prevent the rotation of the plate cylinder from being absorbed by the slack part and not being transmitted to the plate-making part during plate-making, which prevents the quality of the plate-making from deteriorating. Since tension is applied to the slack base paper and it is pulled out and wrapped around the plate cylinder, accurate printing can be performed without wrinkles on the base paper wound around the plate cylinder.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

[Explanation of symbols]

 20 Plate Making Section 21 Plate Cylinder 22 Base Paper Feed Roller 23 Base Paper Ejecting Roller 26 Clamp Section 28 Base Paper 29 Base Paper Drive Motor

Claims (1)

[Claims] 1. A stencil sheet made by the stencil making section is fed by a stencil sheet feeding roller toward a stencil sheet discharge roller and a plate cylinder, and the stencil sheet made by the stencil sheet discharge roller is slackened downward, and then the stencil sheet feed is carried out. Stop the rollers, clamp the leading edge of the base paper, rotate the plate cylinder, and apply tension to the base paper by wrapping around the base paper discharge roller, pull out the base paper from the base paper discharge roller and wind it around the plate cylinder. This is a rotary transcription printing device characterized by being placed within one plate length.