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:
Apr. 07, 1992
Filed:
Feb. 20, 1991
Applicant:
Inventors:
Assignee:
NGK Insulators, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
55 97 ; 55270 ; 55523 ; 73 38 ; 73 40 ;
Abstract
A method of inspecting an alternately sealed honeycomb structural body is provided which can quickly, efficiently and accurately inspect presence of defects of the honeycomb structural body. The method comprises, flowing particulates in axial direction of the throughholes from one end surface to the other end surface of the honeycomb structural body, catching the particulates on a gas-permeable screen intimately mounted on the other end surface to form a figure of the particulates, and checking the figure to inspect for defects at internal partition walls and sealing portions of the honeycomb structural body.