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:
Feb. 26, 2008
Filed:
Mar. 07, 2005
Masayuki Hironaga, Tokai, JP;
Masanari Iwade, Nagoya, JP;
Seiichiro Hayashi, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A process for producing a die for forming a honeycomb structure having slits having hexagonal honeycomb cell shapeat one of surfacesof a plate-like base material for die, and backside holeseach communicating with respective slitsat the other surface, which comprises the steps of forming holesfor dielectric fluid each having an opening diameter smaller than the width of the slitin a predetermined depth at the one of surfacesthereof, and holescommunicating with holesat the rest surface; and then passing a dielectric fluidfor electrical discharge machining from the surfaceto the surfacevia holesanduntil the machining proceeds to a position communicating with each hole; thereby, the slitsare formed at the surfaceof the base material