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:
Apr. 12, 1994
Filed:
Jul. 10, 1992
Applicant:
Inventor:
Alfred Nogossek, Salzgitter, DE;
Assignee:
Friedrich Theysohn GmbH, Langenhagen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
425204 ; 366 82 ; 366 85 ; 425208 ; 4253823 ;
Abstract
A double worm extruder for kneading units along the worms which are rotatable in the same sense. Each kneading unit has three or more circumferentially offset polygonal disks which have sealing surfaces at diametrically opposite locations closely juxtaposed with the inner wall of the housing. These sealing disks are flanked by edges which are inclined to the axes of the worms so as to insure greater flow cross sections past the disks and thereby avoid shear peaks in the extruded material and thermal decomposition thereof.