Method of blackening a magnetic shield for use in a color CRT

Details Method of blackening a magnetic shield for use in a color CRT Method of blackening a magnetic shield for use in a color CRT

1997-04-29

2000-03-07

Willis, Prince

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

148287, 148604, C23C 880

Patent

active

060334940

ABSTRACT:
A method of blackening a magnetic shield for use in a color CRT (Cathode Ray Tube) is disclosed. A plurality of magnetic shield members are stacked with clamps inserted in their holes beforehand or with the intermediary of cut and raised portions or lugs thereof. Therefore, efficient work is promoted in relation to a blackening furnace and other facilities, work space, the number of steps of forming a blackening film, etc. In addition, oxygen flows evenly between the adjacent shield members, forming blackening films of high quality.

REFERENCES:
patent: 2333936 (1943-11-01), Johnson
patent: 3122459 (1964-02-01), Hollis et al.
patent: 4859251 (1989-08-01), Hayami et al.
patent: 5094920 (1992-03-01), Shiozaki et al.

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