Duplex type coating apparatus

Details Duplex type coating apparatus Duplex type coating apparatus

1995-11-27

1997-07-22

Czaja, Donald E.

Coating apparatus

Immersion or work-confined pool type

Work-confined pool

118316, 118325, 118405, 118419, 118683, B05C 302

Patent

active

056500114

ABSTRACT:
A duplex type coating apparatus capable of applying a coating material to the opposite sides of a moving web while causing the applied coating film to remain identical in thickness on each side has a pair of spaced apart die units disposed at the opposite sides of the web. The web is driven to vertically travel under tension between the dies along a predefined path of travel with a gap defined between each web side and an associated one of the dies. Each die has a liquid reservoir and a transversely elongated slot orifice, or discharge port, at the distal end thereof opposing a corresponding side of the moving web. The dies are operatively coupled to constant fluid feed pumps which supply the reservoirs with a specified amount of coating fluid, enabling the discharge ports to apply an identical amount of coating fluid onto each web surface. The fluid feed amount is chosen such that it is kept equivalent to the product of a preset coat thickness and width as well as the web's traveling speed.

REFERENCES:
patent: 4231318 (1980-11-01), Zink
patent: 4872417 (1989-10-01), Kuwabara et al.
patent: 5067432 (1991-11-01), Lippert

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