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:
Jul. 22, 2008
Filed:
Oct. 01, 2003
Nobuhiro Inoue, Kanagawa, JP;
Ken Nomura, Aichi, JP;
Nobuhiro Inoue, Kanagawa, JP;
Ken Nomura, Aichi, JP;
Asahi Glass Comapny, Limited, Tokyo, JP;
Abstract
A glass sheet, which has been heated to have a viscosity of not lower than 10Pa·s and not higher than 10Pa·s, is pressed against a mold having a certain bending surface to be bent. There are a step for controlling a bending temperature T and a bending time period t for the glass sheet so as to satisfy the following formulas 1 and 2, and a step for bending the glass sheet:0.05<φ<2.00Formula 1 where P(τ) is a surface pressure difference (unit: Pa) between a pressure applied on a primary surface of the glass sheet and a pressure applied on a rear surface of the glass sheet at a time τ, t is a bending time period (unit: s), η(T) is the viscosity (unit: Pa·s) of the glass sheet at a temperature T, and T is a bending temperature (unit: ° C.) at the time τ.