CRT electron gun cleaning using carbon dioxide snow

Electric lamp or space discharge component or device manufacturi – Process – Including cleaning

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445 60, H01J 938

Patent

active

056054840

ABSTRACT:
A cleaning system and technique for CRT electron guns is provided in which CO.sub.2 snow is utilized to clean contaminants from the electron gun. The CO.sub.2 snow and CO.sub.2 gas are directed onto the electron gun through small orifices in nozzles arranged at angular positions relative to one another and relative to the electron gun. This enables complete cleaning of the electron gun upon the rotation and movement of the electron gun relative to the two nozzles.

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patent: 5135420 (1992-08-01), Sumi et al.
patent: 5244428 (1993-09-01), Welsch et al.
patent: 5312280 (1994-05-01), Kloba et al.
patent: 5462468 (1995-10-01), Bailey et al.

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