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:
May. 08, 1990
Filed:
Jun. 10, 1988
Applicant:
Inventors:
Shinji Oshima, Ama, JP;
Hidenobu Misawa, Nagoya, JP;
Assignee:
NGK Insulators, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
264 60 ; 264 63 ; 264 67 ; 264317 ;
Abstract
A process for sealing an end face of a ceramic tube is disclosed. The process includes the steps of inserting a porous member made of an organic material into one end of the ceramic tube after the ceramic tube is dried, and pouring and depositing a slurry into the ceramic tube on an axially outer side of the porous member, followed by drying and firing. The porous member is shaped to meet an inner shape of an end of the ceramic tube to be sealed. The slurry exhibits the same coefficient of thermal expansion as that of the ceramic tube during firing.