Apparatus for thermal bending of glass sheets

Details Apparatus for thermal bending of glass sheets Apparatus for thermal bending of glass sheets

1988-11-18

1989-12-26

Kellogg, Arthur

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65106, 65273, 65287, C03B 23025

Patent

active

048895474

ABSTRACT:
Disclosed are techniques of heating and bending glass sheets by gravity, in particular for the production of laminated automobile glazings. In the techniques considered, the glass sheet is carried in a horizontal position by a carriage that brings it step by step into the cells of a furnace where it remains successively during its heating. According to the invention, the heat capacity of walls (26) of the cells has a value lower than that of carriage (18) and of the glass sheet. To heat all the glass sheets in the same way and to limit the reaction time of the furnace, the temperature of heating resistors (31) is regulated, and the weight of the carriage to be heated is limited. The latter can advantageously consist of two parts, one of which remains outside the furnace.

REFERENCES:
patent: 3008270 (1961-11-01), Hohmann et al.
patent: 3248517 (1966-04-01), Vranken
patent: 3697243 (1972-10-01), Artama
patent: 4755204 (1988-07-01), Boardman et al.

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