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. 23, 1976
Filed:
Nov. 11, 1974
Applicant:
Inventor:
Heinz Brinkman, Bennigsen, DT;
Assignee:
Hermann Berstorff Maschinenbau GmbH, An Der Breiten Wiese, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29B / ;
U.S. Cl.
CPC ...
259185 ; 259195 ; 425201 ;
Abstract
An apparatus for plasticizing material such as rubber, synthetics plastics and like plasticizable compositions comprising feeding material between two spaced apart surfaces, preferably rollers, at least one of which is rotatingly propelled, the surfaces being so shaped and relatively disposed that the material is repeatedly subjected to varying pressure, varying down to zero at times, and thus more intensive, less intensive and virtually no shearing work. Where the surfaces are on rollers the rollers are preferably formed with helical grooves, the rollers being rotated in the same or opposite directions.