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:
May. 24, 1983
Filed:
Jul. 10, 1981
Applicant:
Inventors:
Assignee:
Nippon Soken, Inc., Nishio, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29F / ;
U.S. Cl.
CPC ...
425461 ; 2641 / ; 425380 ; 425465 ; 425467 ;
Abstract
An extrusion die for extruding a honeycomb structure having a thick outer peripheral wall without generating any distortion or deformation therein, comprises a die body provided with a plurality of disconnected feed passageways and interconnected grid-shaped extrusion slots, an annular die mask which is closely contacted with the outer peripheral portion of the outlet face of the die body. In the outlet face of the die body, along the inner peripheral wall of the die mask, an annular groove of which depth is smaller than that of the extrusion slots is formed so as to open in the extruding direction.