Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1989-12-27
1992-05-19
Pianalto, Bernard
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427 33, 427425, 427427, B05D 104
Patent
active
051147360
ABSTRACT:
A method and apparatus for electrostatically spray coating substrates with layers of material having uniform thicknesses is provided. A substrate to be coated is electrically grounded and an electrically charged, atomized spray of coating material is directed toward the substrate from a nozzle. The nozzle is traversed along a length of the substrate, which can also be rotated, to coat substantially the entire surface of the substrate. In order to compensate for thickness variations in the applied coating, the speed of traversal of the nozzle is varied. In a preferred embodiment, where photoreceptor drums are produced by spraying a photoreceptor material onto a cylindrical substrate, the speed of traversal of the nozzle is reduced as it approaches at least one end of the cylindrical substrate.
REFERENCES:
patent: 2794416 (1957-06-01), Shepherd
patent: 4375505 (1983-03-01), Newkirk
patent: 4442135 (1984-04-01), Snaddon
patent: 4747992 (1988-05-01), Sypula et al.
patent: 4779564 (1988-10-01), Kiefer et al.
patent: 4811689 (1989-03-01), Yamamoto et al.
Brach Paul J.
Gaither Ronald A.
Griffiths Clifford H.
Leenhouts Timothy J.
Williams Edward C.
Pianalto Bernard
Xerox Corporation
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