Method and apparatus for forming an insulator on a uniaxial tens

Details Method and apparatus for forming an insulator on a uniaxial tens Method and apparatus for forming an insulator on a uniaxial tens

1995-09-18

1997-05-13

Utech, Bejamin

Coating processes

Direct application of electrical, magnetic, wave, or...

Electrostatic charge, field, or force utilized

427 68, 427 71, 427478, 427480, 118624, 118627, 118628, B05D 106, B05B 5025, B05B 5047

Patent

active

056290519

ABSTRACT:
A method and apparatus for forming an insulator 62 on one major surface of a uniaxial tension focus mask 25 includes the steps of: positioning a mask sheet 27, having a multiplicity of openings 42 that extend from a first major surface of the mask sheet through a main body portion thereof to an oppositely disposed second major surface, at a distance from a charging gun 72, 172 having a source 74, 174 of a dry-powdered insulative material; charging and directing the dry-powdered insulative material toward the first major surface of the mask to provide a coating of the charged, dry-powdered insulative material thereon, and providing means 70, 272 for preventing the charged, dry-powdered insulative material from extending into the openings 42 and being deposited onto the main body portion of the mask surrounding the openings and the second major surface. The mask sheet 27, with the charged, dry-powdered insulative material on the first major surface thereof, is then heated to a temperature sufficient to sinter the insulative material. An apparatus for practicing this method also is described.

REFERENCES:
patent: 3578486 (1971-05-01), Fenton
patent: 3811910 (1974-05-01), Labana et al.
patent: 4470822 (1984-09-01), Bloom et al.
patent: 5078812 (1992-01-01), McCoy et al.
patent: 5238709 (1993-08-01), Wilkie

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