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US 4,348,432 AGranted
Method for coating with radially-propagating, free, liquid sheets
AssigneeMinnesota Mining and Manufacturing Company
InventorJohn C. Huang
Life of this patent
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Abstract
Radially-propagating, free, liquid sheets comprising single or multiple discrete layers are used to coat moving substrates. The use of these free liquid sheets allows the high speed application of single or multicomponent coatings to substrates. Apparatus for forming radially-propagating, free, liquid sheets and applying the sheets to substrates in the form of coatings is also disclosed.
Claims4
A method for coating a liquid on a substrate comprising
- (a) providing at least one liquid jet issuing from a nozzle means in laminar flow,
- (b) impinging said jet on a deflecting mass to form a continuous, radially-propagating, free, composite liquid sheet comprising a plurality of distinct layers in a laminar flow mode and
- (c) moving a sheet-like substrate to be coated relative to the plane of said liquid sheet so as to intercept at least a portion of said liquid sheet within the periphery, thereby causing said liquid to impinge on said substrate and to coat one surface of said substrate.
Dependencies are inferred from the claim text.