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. 16, 1991
Filed:
Mar. 15, 1990
Applicant:
Inventors:
Isao Hattori, Nagoya, JP;
Shoji Futamura, Kawasaki, JP;
Assignees:
NGK Insulators, Ltd., Nagova City, JP;
Institute of Technology Precision Electrical Discharge Works, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
B23H / ; B23H / ; B29C / ; B24B / ;
U.S. Cl.
CPC ...
219 6915 ; 51325 ; 5120 / ; 125 1101 ; 219 6917 ; 425464 ;
Abstract
A method of making a honeycomb die by using an electrode with parallel grooves in an electrical discharge machining process. The parallel grooves in the electrode are formed by a grinding wheel having a reverse tapered shape. The grinding wheel is progressively dressed during cutting of the parallel grooves.