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:
Jun. 25, 1985
Filed:
May. 10, 1984
Applicant:
Inventor:
Thomas H Jensen, Murrysville, PA (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B / ;
U.S. Cl.
CPC ...
65-1 ; 65-2 ; 65172 ; 65173 ;
Abstract
The invention involves a fiber glass bushing which is provided with a plurality of tubular feed inlets, through a top cover chamber, which by means of controlled introduction of a gaseous medium allows a gaseous void to be maintained above the glass level in the bushing. The gas void allows easy removal of the bushing from the forehearth and the tubes provide a means of stopping glass flow from forehearth during bushing removal without requiring severe cooling of the surrounding ceramics. Flexibility in glass feed to the bushing for optimum conditions is also possible.