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. 21, 1999
Filed:
Oct. 02, 1997
Applicant:
Inventors:
Akifumi Nishio, Nagoya, JP;
Carine Anne-Marie Dewitte, Ottignies, BE;
Jeffrey Philip Pattimore, Baudour, BE;
Assignees:
NGK Insulators, Ltd., , JP;
NGK Ceramic Europe S.A., , BE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B24B / ;
U.S. Cl.
CPC ...
451 44 ; 451 41 ; 451 49 ;
Abstract
A process for machining edge portions of a ceramic article preform without chipping includes grinding in such consecutive machining steps and machining directions that a chipped portion which results in a machined part of the edge portion in a machining step, is removed by any succeeding. Further, a lastly remaining part of the edge portions of the ceramic article preform is machined in a final step without chipping, thereby enabling the edge portion of the ceramic article preform to be ground without chipping.