Method of reducing glass sheet marking

Details Method of reducing glass sheet marking Method of reducing glass sheet marking

1995-04-03

1998-01-13

Ahmad, Nasser

Glass manufacturing

Processes

Utilizing parting or lubricating layer

65 251, 65 252, 65 26, 65 601, 65 605, 65 6051, 65 6053, 65 607, 427133, 427168, 427193, 427255, 4272551, 427421, C03B 3500, C03B 4002

Patent

active

057074127

ABSTRACT:
The present invention discloses a method of reducing marking of a heat softened glass sheet which results when portions of the sheet are contacted by glass sheet handling equipment. The portions of the sheet susceptible to marking are sprayed with an inert material having a melting point and decomposition temperature of at least 1200.degree. F. to form a layer that protects the sheet portion against marking from the equipment. In one particular embodiment of the invention, the lower major surface of a glass sheet is sprayed with an aqueous solution of sodium sulfate to form a layer of sodium sulfate along the glass surface which protect against marking of the glass by conveyor rolls.

REFERENCES:
patent: 3329490 (1967-07-01), Jendrisak
patent: 3442748 (1969-05-01), D'huart
patent: 3519408 (1970-07-01), Russell
patent: 3791809 (1974-02-01), Lau
patent: 3844754 (1974-10-01), Grubb
patent: 3877919 (1975-04-01), Shorr
patent: 4273832 (1981-06-01), Hogan
patent: 4344986 (1982-08-01), Henery
patent: 4671814 (1987-06-01), Aratani et al.
patent: 4725452 (1988-02-01), Hargreaves
patent: 4753191 (1988-06-01), Henery
Industrial Spray Products, Catalog 55, by Spraying Systems Co. (1993).

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