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. 20, 1985
Filed:
Jul. 23, 1984
John F Krumwiede, Indiana Township, Allegheny County, PA (US);
William C Harrell, Buffalo Township, Butler County, PA (US);
William G Hilliard, Lower Burrell, PA (US);
James E Harris, Wichita Falls, TX (US);
PPG Industries, Inc., Pittsburgh, PA (US);
Abstract
In a glass melting furnace, the beneficial effects of passing molten glass streams through the intensified heating at the surface of the 'spring zone' are enhanced by the use of bubblers. In one aspect, the rate of bubbling is greater near a side wall of the furnace than in the center immediately upstream of the spring zone so as to direct side portions of the throughput stream into the spring zone. In another aspect of the invention, the rising currents of the spring zone are enhanced by bubbling a stream entering the spring zone at a first elevation and then bubbling the same stream portion at a higher elevation.