Apparatus for coating an advancing substrate
AssigneePPG Industries, Inc.
InventorsHarold E. Donley, William P. Cathers
Life of this patent
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Abstract
A coating apparatus employing a continuous traveling chain to move coating composition dispensers across a conveyer for coating glass traveling on the conveyer is provided with at least two sets of coating dispensers, all positioned for dispensing coating composition generally normal to a plane in which the chain travels, with the sets of coating dispensers actuated during separate portions of their travel along the path of the traveling chain in order to continuously produce multiple film coatings as the dispensers remain oriented throughout their travel in facing relation to the conveyer.
Claims6
In an apparatus for dispensing a coating composition onto a surface of a substrate comprising a substrate conveying means having a plane of conveyance, an endless chain in a plane substantially parallel to the plane of the conveying means, a plurality of coating dispensers mounted on the chain, each oriented for dispensing a coating composition toward the plane of the conveyer, a rotatable coating composition distributing means for distributing coating composition to each dispenser and means for driving the chain and the rotatable distributing means to cause the dispensing means to twice traverse the conveying means during a cycle of rotation along paths extending across the conveying means transverse to an intended path of substrate conveyance, the improvement which comprises
- means for selectively operating a first set of the plurality of dispensers to cause them to dispense a first coating composition during a first traverse of the conveying means, and
- means for selectively operating a second set of the plurality of dispensers to cause them to dispense a second coating composition during a second traverse of the conveyer means.
Dependencies are inferred from the claim text.