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:
May. 10, 1977
Filed:
Jun. 02, 1975
Applicant:
Inventor:
John F Sopko, Levelgreen, PA (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C03C / ;
U.S. Cl.
CPC ...
65 6 / ; 65 9 / ; 118 47 ; 118 491 ; 118 65 ; 427109 ; 427255 ;
Abstract
A continuous glass ribbon advances from a float forming chamber past a first heat source and into a coating chamber where a surface of the glass ribbon is provided with a pyrolytic oxide coating as a second heat source heats the opposed surface of the glass ribbon. Thereafter the glass ribbon is advanced into an annealing lehr to relieve residual stress in the glass ribbon. The first heat source reduces the heat loss of the ribbon as it advances into the coating chamber to provide a durable pyrolytic oxide coating on the glass ribbon. The second heat source heats the ribbon to minimize or eliminate glass ribbon warpage.