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:
Nov. 13, 2007
Filed:
Nov. 08, 2005
Yukihisa Wada, Nisshin, JP;
Tomohiro Iida, Nagoya, JP;
Jiro Maeda, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
There is disclosed a die for forming a honeycomb structure and a method of manufacturing the honeycomb structure by use of the die, in which variations of cell pitches are suppressed in a central portion and the vicinity of an outer periphery after drying and firing an extruded honeycomb structure, and the honeycomb structure having a uniform cell pitch can be manufactured. A diefor forming a honeycomb structure has a front surface provided with groovy slitsformed between cell blocksand a back surface provided with back holescommunicating with the slits. The diehas a structure in which a pitch P of the adjacent cell blocksis enlarged from a central portion of the front surface toward an outer periphery in a stepwise manner.