Process for making aluminum-coated glass-ceramic cooking vessel

Details Process for making aluminum-coated glass-ceramic cooking vessel Process for making aluminum-coated glass-ceramic cooking vessel

1976-08-09

1977-11-01

Gwinnell, Harry J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

427226, 427314, 427383A, 427404, 428432, 65 60C, B32B 1504

Patent

active

040566501

ABSTRACT:
Aluminum-coated glass-ceramic cookware of improved performance and durability is provided by a process comprising selecting a glass-ceramic vessel of specified strength and expansion characteristics, preheating the surface of the vessel to a temperature in the range of about 120.degree.-600.degree. C., flame-spraying molten powdered aluminum metal onto the surface of the vessel, optionally heat-treating the thus-coated vessel to provide an aluminum metal coating of excellent adherence and good thermal conductivity thereon, providing the aluminum coating with a film of phosphoric acid and heating said aluminum coating and film to a temperature at least sufficient to decompose the phosphoric acid. A supplemental oxide film may also be applied to protect the aluminum metal coating.

REFERENCES:
patent: 2053923 (1936-09-01), Stewart
patent: 2162980 (1939-06-01), Smith
patent: 2197274 (1940-04-01), Menke
patent: 2438877 (1948-03-01), Spruance
patent: 2962389 (1960-11-01), Menke
patent: 3019515 (1962-02-01), Whitehurst et al.
patent: 3428513 (1969-02-01), Dennison
patent: 3432331 (1969-03-01), Braddy et al.
patent: 3479217 (1969-11-01), Spraoudis
patent: 3523013 (1970-08-01), Small
patent: 3567509 (1971-03-01), Kuiper
patent: 3615318 (1971-10-01), Jagodzinski et al.
patent: 3734767 (1973-05-01), Church et al.

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