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:
Sep. 21, 1982
Filed:
Feb. 13, 1981
Duane H Faulkner, Battle Creek, MI (US);
Vaughn C Chenoweth, Hollansburg, OH (US);
Guardian Industries Corporation, Northville, MI (US);
Abstract
An electric glass-melting furnace has a cylindrical orifice block formed of a single block of refractory metal and an orifice through which molten glass flows out of the furnace. The inner end of the block extends into the melting zone portion of the furnace, while the remainder of the block extends through the furnace lining and wall, with the extreme outer tip being flush with the outer face of a water jacket which surrounds the outer end portions of the block. The block has a reduced diameter portion adjacent the outer end of the block, so that the outer end face exposes minimal surface area to outside atmosphere. The direct contact of the cooling jacket with the outer end of the block keeps the temperature of this small mass of block low enough to avoid oxidation. No protective atmosphere is required for the exterior tip of the block.