Coating apparatus – Projection or spray type – With mask or stencil
Patent
1989-05-02
1990-12-04
Housel, James C.
Coating apparatus
Projection or spray type
With mask or stencil
118323, 118504, 901 43, B05B 128, B05B 1504
Patent
active
049745328
ABSTRACT:
Apparatus for spray coating a first portion of a workpiece with a coating material while masking a second portion of the workpiece bordering the first portion, so as to preclude coating of the second portion, includes a spray nozzle for spraying the coating material onto the workpiece, apparatus for moving the spray nozzle with respect to the workpiece so as to coat the workpiece along the first portion, and a mask arrangement for preventing sprayed coating material from contacting the workpiece beyond the first portion. The mask arrangement includes a rotatable mask, mounted on the spray nozzle, for translational movement therewith. The rotatable mask has an edge which moves along the workpiece adjacent the border between the first and second portions. The mask arrangement further includes a motor for rotating the mask as the mask moves with the means for spraying, so as to bring clean portions of the mask into proximity with the border. Finally, the mask arrangement includes a blade for continuously cleaning the rotatable mask such that the coating material does not accumulate thereon to produce defects in the coating sprayed on the workpiece.
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patent: 4800102 (1989-01-01), Takada
Ellerbrock Charles H.
Ford Motor Company
Housel James C.
May Roger L.
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