Heat treatment jig for use in the manufacture of cathode-ray tub

Details Heat treatment jig for use in the manufacture of cathode-ray tub Heat treatment jig for use in the manufacture of cathode-ray tub

1983-04-04

1984-08-21

Yuen, Henry C.

Heating

Accessory means for holding, shielding or supporting work...

452258, F27D 500

Patent

active

044667930

ABSTRACT:
The present invention is a heat treatment jig for use in the baking process, the frit seal process, and the evacuation process during the manufacture of cathode-ray tubes. It comprises a base and one or more support members formed from a novel material comprising mica, talc, orthoboric acid, boric acid anhydride, and zinc oxide molded under heat and pressure. This novel molded material is superior in its mechanical properties to the substances (asbestos tape, asbestos cement, or boron nitride) used for the support members of conventional heat treatment jigs. In addition, it does not pose a danger to health like asbestos products and it is far lower in cost than boron nitride.

REFERENCES:
patent: 1186491 (1916-06-01), Moorcroft
patent: 2656170 (1953-10-01), Mann
patent: 2958924 (1976-05-01), Egenolf et al.
"Bulletin of the Chemical Society of Japan", (Weathering of H.sub.3 BO.sub.3 -ZnO Bond for Forming Glass Fiber Reinforced Composite), vol. 55, No. 4, Apr. 1982, pp. 1333-1334.
"Reaction Mechanism of H.sub.3 BO.sub.3 -ZnO Bonding Material Under Hot-Pressing and Heat Treatment", (The Journal of the American Ceramic Society), vol. 64, No. 11, Nov. 1981, pp. C164-C165.

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