Edge-control system for curtain coater
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United States of America Patent
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Jul 25, 2006
Grant Date -
Jun 16, 2005
app pub date -
Apr 5, 2002
filing date -
Apr 9, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A coating system for a web traveling in a web-travel direction has a slot nozzle from which a curtain of a coating material falls on the traveling web and a pair of guide elements flanking the slot nozzle and having confronting and vertical inner faces engaging and defining edges of the curtain. Respective aspiration elements fixed at lower ends of the guide elements have inner faces vertically aligned with and forming vertical continuations of the inner faces of the respective guide elements, and each formed with a vertical and inwardly open aspiration groove and with a transversely extending vacuum passage open into the respective groove. Respective floors on the aspiration elements downwardly close the respective aspiration grooves and are each formed with a sharp inwardly directed edge closely spacedly juxtaposed with the web. Excess coating material is aspirated from the curtain through the vacuum passages.
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Cited Art Landscape
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