The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 26, 1989
Filed:
Nov. 18, 1988
Saint-Gobain Vitrage 'Les Miroirs', Courbevoie, FR;
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.