Coating processes – Centrifugal force utilized
Patent
1998-03-12
1999-11-09
Edwards, Laura
Coating processes
Centrifugal force utilized
427127, 427162, 118 52, 118 56, 118319, 118320, 118500, 118503, 118504, 118505, B05D 100
Patent
active
059809850
ABSTRACT:
The present invention provides an apparatus and method for forming a protective film on a disc-shaped recording medium including providing a turntable having a center aperture, setting the disc-shaped recording medium having a center opening on the turntable with the center opening being aligned with the center aperture, covering at least the center opening of the disc-shaped recording medium with a rotating disc having a portion larger in diameter than the center opening of the disc-shaped recording medium, and supplying a protective film material to the center of the rotating disc and simultaneously rotating the turntable, the disc-shaped recording medium, and the disc to cause an outward radial flow of the protective film material off the disc and onto the disc-shaped recording medium so that the protective film is obtained and has a thickness with a small variation.
REFERENCES:
patent: 5199988 (1993-04-01), Kamezakie et al.
Edwards Laura
Sony Corporation
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