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:
Nov. 12, 1991
Filed:
Mar. 11, 1991
Keikichi Imogawa, Ichinomiya, JP;
Kazuo Nakasako, Nagoya, JP;
NGK Insulators, Ltd., Aichi, JP;
Abstract
An excellent ceramic fiber furnace is provided which prevents formation or peeling-off of minute ceramic fibers from a ceramic fiber board of the furnace caused by elevation or lowering of the furnace temperature. As a result, firing methods of using a muffle furnace, a reflector system or a brick wall furnace, etc., which necessitate a large heat source and which have inferior heat efficiencies and small temperature-raising or lowering rates, need not be used, so that investment cost and running cost can be decreased, firing of ceramic products is facilitated, the quality of the ceramic products is improved, and the firing time of the ceramic products can be decreased. The ceramic fiber furnace has a furnace wall of a structure composed of a substrate member, a wall of ceramic fibers applied on the inner surface of the substrate member, a ceramic fiber board applied on the inner surface of the wall of the ceramic fibers, and a ceramic pin penetrating through the furnace wall, comprising a ceramic plate interposed between the ceramic nut and the ceramic board, the ceramic plate having a penetration hole which has a larger diameter than the diameter of the ceramic pin for allowing free displacement of the ceramic pin therein.