Edge-control system for curtain coater

Details Edge-control system for curtain coater Edge-control system for curtain coater

2006-07-25

2006-07-25

Lamb, Brenda A. (Department: 1734)

Coating apparatus

Immersion or work-confined pool type

Work-confined pool

C118S325000, C118SDIG009

Reexamination Certificate

active

07081163

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.

REFERENCES:
patent: 4974533 (1990-12-01), Ishizuka et al.
patent: 6048582 (2000-04-01), Schweizer et al.
patent: 6464858 (2002-10-01), Brown et al.
patent: 6468592 (2002-10-01), Becker et al.

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