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. 28, 1989
Filed:
Sep. 02, 1988
Applicant:
Inventors:
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29B / ;
U.S. Cl.
CPC ...
425464 ; 4253824 ; 425461 ; 26417712 ;
Abstract
An extrusion die for extruding ceramic honeycomb structural bodies includes body discharge channels having a desired honeycomb arrangement and independent body supply holes communicating with the body discharge channels. The body supply holes are so designed that each of them has inner peripheral surface zones of different inner dimensions and the inner peripheral surface zones may be coaxially arranged.