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:
Nov. 19, 1991
Filed:
Jun. 27, 1990
Esko O Lehto, Kangasala, FI;
Jukka H Vehmas, Tampere, FI;
Tamglass Oy, Tampere, FI;
Abstract
The invention relates to a method and a mould assembly for bending complex shapes on a glass sheet. The invention relates also to a bending mould and its manufacturing method. A heated glass sheet placed upon a ring mould is bent to its final shape by means of an over-head non-contacting mould (6) whose curved lower surface (7, 8) is provided with blasting orifices (10) and suction orifices (11). Blasting orifices (10) are used to blow hot air for heating a glass sheet at least locally while building an air cushion between shaping surface and glass sheet. The hot air blown from blasting orifices (10) is used to apply a greater heat volume to those sections of the glass sheet surface in which the bending radius of a glass sheet is the smallest or deformation (elongation, bending) is the greatest.