Coating apparatus – Work surface shields – masks or protectors – Work-attached
Patent
1995-09-13
1997-11-18
Czaja, Donald E.
Coating apparatus
Work surface shields, masks or protectors
Work-attached
118500, 118 52, 118319, 269908, B05C 1111
Patent
active
056883285
ABSTRACT:
Apparatus for applying an antistatic and/or antireflective coating to the outer surface of a curved glass display screen of a cathode ray tube (CRT) includes a spin coating arrangement for rotating the CRT about its longitudinal axis after the coating solution is deposited on a center portion of the display screen. Centrifugal force and gravity urge the coating solution outwardly toward the edges of the display screen in forming a thin layer of uniform thickness on the display screen. A curved shield shaped in accordance with the display screen's curvature is disposed above the display screen in closely spaced relation thereto to form a chamber of stable air above the display screen and eliminate air turbulence and its tendency to spread the coating nonuniformly. The curved shield may include a center aperture for permitting the coating solution to be deposited upon the display screen prior to rotation and is adapted for easy attachment to and removal from the CRT's peripheral implosion protection band.
REFERENCES:
patent: 4695045 (1987-09-01), Chase et al.
patent: 4930015 (1990-05-01), Dougherty et al.
patent: 5489369 (1996-02-01), Bjornard et al.
Hu Chun-Min
Tong Hua-Sou
Chunghwa Picture Tubes Ltd.
Czaja Donald E.
Padgett Calvin
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