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. 26, 1993
Filed:
Sep. 28, 1992
Kazuhiro Miyahara, Nagoya, JP;
NGK Insulators, Ltd., , JP;
Abstract
A method for firing a ceramic honeycomb structure by a single furnace at a predetermined temperature in a predetermined atmosphere, while controlling combustion of a burner means for heating the ceramic honeycomb structure from the outside thereof. To this end, temperatures at the inside and outside portions of the ceramic honeycomb structure are detected, and the outside temperature thereof is regulated relative to the inside temperature thereof, based on the detected temperatures. The method ensures stable firing to produce a high-quality ceramic honeycomb structure, in which a pore-forming agent is uniformly burnt throughout the inside and outside of the product and the difference in the diameter of fine holes between those inside and those outside thereof is minimized so as to eliminate occurrence of cracks within and at end portions of the ceramic honeycomb structure.