Shaping glass sheets

Details Shaping glass sheets Shaping glass sheets

1975-06-02

1976-11-16

Kellogg, Arthur D.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65106, 65245, 65253, 65273, 65286, C03B 2302

Patent

active

039921816

ABSTRACT:
In the roll forming method of shaping glass sheets, glass defects are reduced by employing a mild stream of cooling gas in the vicinity of the lower forming rolls and/or the underside of the glass sheet.
During continuing mass production runs at high rates of production extending over long periods, the heated glass sheets heat the surfaces of the lower rotating forming rolls to a significantly higher temperature than that of the upper rotating forming rolls. The present invention reduces the detrimental effects that have been determined by the present invention to be due to this temperature differential between the surface temperature of the upper forming rolls and that of the lower forming rolls.

REFERENCES:
patent: 3497340 (1970-02-01), Dennison et al.
patent: 3545951 (1970-12-01), Nedelec

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