Method and apparatus for punching and imaging a continuous web

Printing – Planographic – Lithographic plate making – and processes of making or using...

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Details

101477, 101485, 347262, B41C 110, B41J 2435

Patent

active

058651187

ABSTRACT:
A novel method and apparatus for the imaging of a continuous web on an internal drum type imaging device is disclosed. The method and apparatus may further be included in a process to produce punched, imaged sheets. A web is punched with registration holes and imaged in an internal drum-type imager prior to cutting the web into individual imaged plates particularly for use as printing plates. The web with an imageable surface is serially punched, imaged and sheeted with the punched holes being utilized to assure registration and alignment in the imaging operation and in the subsequent use of the plates on a printing press. The imaging station has an arcuate concave imaging platen. The web is advanced under tension and then stopped while a roller on an arm forces the web down into contact with the platen. Vacuum is then used to hold the web on the imaging platen while the web is imaged.

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