Anti-wrinkle system for a web offset press
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United States of America Patent
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Jun 26, 2001
Grant Date -
N/A
app pub date -
Aug 10, 1999
filing date -
Aug 10, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a system and method of eliminating wrinkling, tearing and web-breaks of a web in an offset printing press as the web contacts the chill rollers on start-up. The system operates to eliminate the wrinkling that generates the tearing. During startup, a spreader roller impinges the web, stretching out wrinkles. During acceleration of the press, when thermal contraction of the paper also achieves the desired stretching, the spreader roller is retracted to prevent smearing of ink on the web. Uneven pressure of the spreader is utilized to implement steering of the web to enhance web centering.
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