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:
Oct. 06, 1992
Filed:
May. 16, 1991
Applicant:
Inventor:
Jurgen Voigt, Wathlingen, DE;
Assignee:
Hermann Berstorff Maschinenbau GmbH, Hanover, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29B / ; B29B / ;
U.S. Cl.
CPC ...
425204 ; 425207 ; 425209 ; 366 77 ; 366 85 ; 366 88 ; 366190 ; 366195 ; 366196 ;
Abstract
An extrusion device for processing thermoplastic plastics material and rubber has a housing and primary screw means rotatably mounted therein. The device includes a discharge zone in which a sleeve member provided with external flights is mounted on a bearing shaft so as to be rotatable about its longitudinal axis, which sleeve member is drivable by the primary screw means but in an opposite direction thereto so as to increase the discharge pressure acting on the material being processed.