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:
Oct. 13, 1981
Filed:
Sep. 04, 1979
Frederick W Winzer, East Granby, CT (US);
James R Ault, New Britian, CT (US);
Emhart Industries, Inc., Farmington, CT (US);
Abstract
An electrically heated and/or gas heated forehearth channel has a heat conductive refractory roof structure with arch blocks supported from the sides of the channel on side blocks, some of which side blocks may include gas burners for achieving rapid initial heating of the glass contained in the channel. Once the glass temperature has been raised close to normal operating temperature electrodes heat the glass by Joule effect electrical resistance heating, and the gas burners are no longer required. A roof superstructure is provided of insulating brick, and defines muffled cooling passageways such that the gas or electrically heated forehearth can be effectively operated by removing heat from the top of the conductive refractory arch block roof structure. Means is provided for selectively cooling the underside of these arch blocks when the gas burners are operated, or directing the flow of cooling air through the muffled cooling passageways in the roof superstructure when electric heat is employed.