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:
Sep. 29, 2009
Filed:
Oct. 28, 2004
Takahiro Kondo, Nagoya, JP;
Yoichi Aoki, Nagoya, JP;
Akihiro Mizutani, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A method of inspecting unevenness of a partition wall surface of a honeycomb structure includes the steps of: allowing a diffusion light to enter from one end faceside by a predetermined lighting meansand to exit from the other end faceside of the honeycomb structureafter passing it through the inside of the cells, allowing the exited diffusion light to pass through a translucent screendisposed on the other end faceside of the honeycomb structureto act as a transmitted light, projecting a transmitted imageby means of the tone of the transmitted light onto the transmitted light side of the screen, picking up the transmitted imageprojected on the screenby an imaging means, and analyzing by an analyzing meansthe gray level of the obtained image to inspect for each cell the degree of the surface unevenness of the partition walls. This method enables easy inspection on the surface unevenness of the partition walls of the honeycomb structure