Glass manufacturing – Processes – Glass preform treating
Patent
1976-02-04
1977-11-08
Kellogg, Arthur D.
Glass manufacturing
Processes
Glass preform treating
65349, 65351, C03B 2700
Patent
active
040574113
ABSTRACT:
The present invention improves the quality of glass sheets with respect to roll ripple distortion by providing criteria for selectively maintaining conveyor rolls in a critical portion of the conveyor which comprises only those rolls located within an area defined by a first location a short distance upstream of the exit of the furnace and a second location a short distance downstream of the furnace exit. Surprisingly, by maintaining adequate alignment and using relatively small diameter, closely spaced conveyor rolls in this critical conveyor portion only, roll ripple distortion has been reduced to a considerable extent. The remaining conveyor rolls in the other portions of the conveyor need not be subjected to as frequent maintenance as the rolls in the critical portion of the conveyor, thereby lessening the cost of maintaining glass sheet heat-treating apparatus in good operating condition.
REFERENCES:
patent: 1885306 (1932-11-01), Sylvester
patent: 3881906 (1975-05-01), Ritter, Jr. et al.
patent: 3891420 (1975-06-01), Frank
patent: 3929441 (1975-12-01), Frank
Kellogg Arthur D.
Mates Edward I.
Millman Dennis G.
PPG Industries Inc.
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