Coating apparatus – Immersion or work-confined pool type – Work-confined pool
Patent
1983-06-10
1985-04-23
McIntosh, John P.
Coating apparatus
Immersion or work-confined pool type
Work-confined pool
118413, B05C 502
Patent
active
045122792
ABSTRACT:
A method and apparatus for applying a film of liquid pigmented coating material to a moving web of paper at, and between, a low limit of two pounds per ream and a high limit of fifteen pounds per ream. The method and apparatus utilize a reservoir of liquid coating material established between a forward liquid coating material seal and a rearward pneumatically loaded and clamped doctor blade spaced a small distance of a few inches or less from the liquid seal. The reservoir is pressurized in the range of 7 to 150 inches of water so that the coating material is applied under pressure to the moving web and then almost instantaneously wiped by the doctor blade. The reservoir is formed by two relatively movable, sealed members which may be opened for easy cleaning, and may have one or more internal coating material distribution headers at its end opposite the web to uniformly distribute the coating material. A reliable, duplicable adjustment for a movable element forming the front edge of the reservoir is provided to establish and control the liquid seal. End dams are located at the ends of the reservoir between the doctor blade and cut-away portions of the movable element to control undesired outflow of coating material. Further, a pair of such applicators may be arranged on opposite sides of the web to simultaneously coat both sides of the web. In addition, the method and apparatus have other features providing easy adjustment, operation, clean-up, high, low or medium weight coatings better than any single prior device and method, and better lightweight coatings than prior devices and methods.
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Damrau Wayne A.
Gauss James C.
Consolidated Papers Inc.
McIntosh John P.
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