Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1977-07-11
1979-04-17
Beck, Shrive P.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
113120A, 427181, 427183, 427195, 427231, 427233, 427234, 427236, 427239, 427318, 427425, B05D 100, B05D 108, B05D 302, B05D 308
Patent
active
041501640
ABSTRACT:
The interior of cylindrical metal containers are coated with a thin, substantially uniform comestible coating by spraying finely divided resinous particles into the container after it has been preheated by a plasma arc-generated flame to a temperature above the softening point of the resin. The process is capable of coating containers at rates up to about 600 containers per minute with a substantially pore-free film having a thickness less than about one mil to as low as 0.1 mil and lower. Typical of containers coated by the process are conventional two-piece aluminum containers. Typical preheat temperatures are from about 150.degree. F. to about 525.degree. F. for aluminum containers and from about 150.degree. F. to about 1000.degree. F. for steel containers. A typical preheat time is from about 30 to about 300 milliseconds. Typical resins are finely divided thermosetting epoxy powders. The plasma arc device may also be used to post-heat coated containers to mature the coating.
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Coucher Robert G.
Gerek Gene
Beck Shrive P.
W. R. Grace & Co.
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