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Method and apparatus for feeding printing plates

A printing plate and plate cylinder technology, applied in the field of cylinders, can solve the problems of matching quality reproducibility and quality reduction, deformation and unevenness of multi-color overprinting

Active Publication Date: 2010-09-15
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem is that due to the tensioning process of the plate on the surface of the plate cylinder, deformations, non-uniform stress distribution and unevenness can occur which cannot be completely avoided due to the feeding and clamping process
As a result, the achievable fit quality, especially the reproducibility of the plate clamping process and the quality of multicolor overprints can be reduced

Method used

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  • Method and apparatus for feeding printing plates
  • Method and apparatus for feeding printing plates
  • Method and apparatus for feeding printing plates

Examples

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Embodiment Construction

[0022] A machine for processing sheets 7 , for example a printing press 1 , has a feeder 2 , at least one printing unit 3 or 4 and a delivery 6 . The sheets 7 are removed from a sheet stack 8 and fed to the printing units 3 and 4 individually or in sheets via a supply table 9 . The printing units each comprise a printing form cylinder 11 in a known manner. The plate cylinders each have a device 13 , 14 for fixing a flexographic printing plate. In addition, a device 16 for semi-automatic or fully automatic changing of printing plates is assigned to each printing plate cylinder 11 .

[0023] The sheet stack 8 rests on a stacking plate 10 which can be raised and lowered in a controlled manner. The sheets 7 are removed from the upper side of the sheet stack 8 by means of a so-called suction head 18, which essentially has a plurality of lifting and pulling suction devices 19 for separating the sheets 7, twenty one. In addition, a blower device 22 for loosening the upper sheet a...

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PUM

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Abstract

The present invention relates to a method and an apparatus for feeding printing plates to a plate cylinder of a printing press, load the printing plate in the vicinity of its front edge with a curvature which extends convexly with regard to the plate cylinder axis.

Description

technical field [0001] The invention relates to a method and a device for supplying printing plates to a cylinder, in particular a printing plate cylinder, of a printing press. Background technique [0002] The support of the printing forme on the circumference of the printing forme cylinder is of great importance for the printing quality when changing the printing forme, in particular when supplying new or used printing formes to the forme cylinders of the printing press. [0003] There are problems that, due to the tensioning process of the printing plate on the surface of the plate cylinder, deformations, non-uniform stress distributions and unevennesses can arise which cannot be completely avoided due to the feeding and clamping process. As a result, the achievable fit quality, in particular the reproducibility of the plate clamping process and the quality of multicolor overprints, can be reduced. [0004] EP 0570702 B2 discloses a device for supplying a printing plate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F27/12
CPCB41F27/1206B41P2227/62
Inventor C·巴尔赖希C·克尔姆T·克吕格尔D·舍恩曼G·斯特凡
Owner HEIDELBERGER DRUCKMASCHINEN AG