Apparatus for limiting the coating edge in a short dwell coater
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United States of America Patent
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Aug 18, 1998
Grant Date -
N/A
app pub date -
Jan 13, 1997
filing date -
Jul 15, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A coating edge limiter for a coating arrangement with a short dwell time. Color is fed under pressure into a coating chamber formed by a backing roll around which a paper web is guided, a barrier wall, a doctor blade element and sealing blocks located at both ends of the coater. A formatting plate almost completely covers an application zone between the doctor blade element and the barrier wall so that an edge region of the web is sharply delineated and kept completely free of color. In each of the sealing blocks water is supplied via channels to depressions thereby forming a pressure cushion. This pressure cushion prevents the pressurized color in the coating chamber from flowing out laterally and ensures that the formatting plate is pressed flatly against the web. The coating edge limiter thereby makes it possible to establish very precisely the width of the web to be produced.
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Cited Art Landscape
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