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:
Aug. 07, 2012
Filed:
Nov. 29, 2005
William R. Krall, Jr., Gibsonia, PA (US);
William R. Siskos, Delmont, PA (US);
Thomas M. Sailock, Lower Burrell, PA (US);
Joseph Medzius, Cranberry, PA (US);
Dewitt W. Lampman, Gibsonia, PA (US);
William R. Krall, Jr., Gibsonia, PA (US);
William R. Siskos, Delmont, PA (US);
Thomas M. Sailock, Lower Burrell, PA (US);
Joseph Medzius, Cranberry, PA (US);
DeWitt W. Lampman, Gibsonia, PA (US);
PPG Industries Ohio, Inc., Cleveland, OH (US);
Abstract
A method of tempering a glass sheet heated to a tempering temperature includes cooling the glass sheet at a first heat transfer coefficient at a first quench station and cooling the glass sheet at a second heat transfer coefficient at a second quench station downstream of the first quench station. The second heat transfer coefficient is greater than the first heat transfer coefficient. In a multistage process of the invention, a plurality of quench stations could be used with each downstream quench station having a larger heat transfer coefficient than the previous upstream quench station.