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:
Apr. 04, 1978
Filed:
Jul. 27, 1977
Applicant:
Inventors:
Stanley Lythgoe, Parbold, EN;
David Gelder, Parbold, near Wigan, EN;
Assignee:
Pilkington Brothers Limited, St. Helens, EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B / ;
U.S. Cl.
CPC ...
65135 ; 65 9 / ; 6518 / ; 65339 ; 65346 ; 65347 ;
Abstract
In the refining zone of a glass melting tank the molten glass is supported on a heat conducting base, such as molten tin, heat is removed from the glass through the base and the depth of glass, length of refining zone and temperature difference between the inlet and outlet of the zone are controlled so that the ratio of return flow to forward flow through the zone is between 1/6th and 1/2.