Apparatus for introducing sheet into sheet-fed printing press

A technology for introducing devices and sheets, which can be used in printing presses, general parts of printing machinery, printing devices, etc., and can solve the problems of high production cost, complex structure and control of supporting elements, etc.

Inactive Publication Date: 2010-11-10
SHINOHARA MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, according to this prior art, the structure and control for the movement of the support member are very complicated, so the production cost must be high

Method used

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  • Apparatus for introducing sheet into sheet-fed printing press
  • Apparatus for introducing sheet into sheet-fed printing press
  • Apparatus for introducing sheet into sheet-fed printing press

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] An embodiment of the sheet introducing device of the present invention will be described in detail below with reference to the accompanying drawings. In a sheet-fed printing machine that sequentially overlaps and prints black, cyan, magenta, and yellow colors on a finalized sheet, the printing units 10 of each color are prepared as separate standardized units, and the sheet travel direction ( figure 1 The side panels 12 on both sides are connected to each other from right to left.

[0021] And, as is known, between the side plates 12 on both sides, the plate cylinder 14, the blanket cylinder 16 and the impression cylinder 18 of double diameter are rotatably supported for offset printing. The cylinder 20 connects between the printing units 10 and constitutes a transport path for the sheet.

[0022] In addition, the double diameter here refers to having twice the diameter of the printing plate cylinder 14 on the basis of the diameter, which is a commonly used expression ...

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PUM

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Abstract

The present invention aims at an improved apparatus for introducing sheet smoothly into printing unit even in case thickness of sheet is changed without any adjustment. The present invention premises a sheet-fed printing press whose sheet transfer path for a plurality of printing units (10) in modular fashion is composed of double-sized transfer and impression cylinders. The apparatus for introducing sheet into said sheet-fed printing press comprises a first double-sized transfer cylinder (30) whose center of rotation is above the transfer path of sheet (24) and has, in succession with gripper means (40) on its circumference, curved guide member (42) which can be depressed in radial direction of the cylinder; a second transfer cylinder (32) of approximately the same construction with said double-sized impression cylinder (18) and is in contact with the lower portion of said first transfer cylinder (30) and said transfer cylinder (20) of said first printing unit (10a).

Description

technical field [0001] The present invention relates to a sheet-fed printing machine, and more particularly to a sheet introduction device capable of smoothly feeding a sheet to a printing unit without any adjustment work even if the thickness of the paper is changed. Background technique [0002] With regard to a sheet-fed printing machine that continuously overlaps and prints each color on a shaped sheet, if the printing unit of each color is a modular structure, the manufacture and assembly of the parts can be greatly simplified, and as a result, the production cost can be reduced. [0003] In addition, the thickness of sheets used in sheet-fed printing machines varies from thin paper of about 0.04 mm to thick paper of about 1.25 mm. The repulsive force) is also different, so it is hoped that even if the paper thickness changes, the sheet can be smoothly introduced into the printing unit. [0004] A sheet-fed printing machine is disclosed in Japanese Patent Application P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F21/10
CPCB41P2217/11B41F21/10
Inventor 增田静夫
Owner SHINOHARA MACHINERY
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