Coating processes – Measuring – testing – or indicating
Patent
1992-08-07
1994-03-29
Owens, Terry J.
Coating processes
Measuring, testing, or indicating
427424, 427480, 118323, 118624, 118631, 118679, 118712, B05D 102
Patent
active
052982777
ABSTRACT:
A coating method which reduces the nonuniformity of a sprayed coating film at an end portion of a moving workpiece. A spray gun moves along a locus in a direction transverse to a conveying direction of the workpiece. The dimensions of the workpiece and passage of an end portion of the workpiece past the spray gun are detected. A reduced amount of coating material is sprayed at an end portion of the workpiece in response to the determination of passage of the end portion past the spray gun in order to prevent an increase in thickness of the coating film at the end portion. In the case of electrostatic spraying, an increase in film thickness at the end portion can be prevented by reducing or nullifying the electrostatic voltage applied to the end portion of the workpiece.
REFERENCES:
patent: 2559225 (1951-07-01), Ransburg
patent: 2636471 (1953-04-01), Starkey
patent: 3593308 (1971-07-01), Fagan
patent: 3777702 (1973-12-01), Fitzgerald
patent: 4357900 (1982-11-01), Buschor
Patent Abstracts of Japan, JP-A-21 84 363, Jul. 18, 1990, Hirose Akio, "Coating Device".
Kabushiki Kaisha Kobe Seiko Sho
Owens Terry J.
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