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:
Aug. 01, 1995
Filed:
May. 28, 1993
Applicant:
Inventor:
Yoshiki Hirai, Tokyo, JP;
Assignee:
Hitachi Powdered Metals Co., Ltd., Chiba, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
425 79 ; 264120 ; 2641761 ; 2642091 ; 425380 ; 4253824 ; 425467 ;
Abstract
An apparatus for extruding a powdered material forms an elongated pellet. The extrusion apparatus includes a connection mechanism arranged between the inlet and the constriction passages for continuously connecting two successively charged portions of the powdered material when the powdered material is repeatedly charged. By this mechanism, the formerly charged and semicompacted portion of the powdered material and the border surface upon the subsequent portion are broken, either by a core piece or a modified die cavity, whereby the portions of the powdered material are merged with each other before the constriction.