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:
Jan. 03, 1984
Filed:
Jul. 07, 1981
Applicant:
Inventor:
Dietmar Anders, Hanover, DE;
Assignee:
Hermann Berstorff Maschinenbau GmbH, Hanover, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29B / ;
U.S. Cl.
CPC ...
366 75 ; 366 85 ; 366 88 ; 366 89 ;
Abstract
The advantages of a twin-screw extruder, especially the good plasticizing and homogenizing effect, are to be retained in the present invention with a simultaneous, above-average degassing output of the extruder. This object is achieved by dividing the twin-screw extruder into two stages (a) the plasticizing and homogenizing stage with a high screw torque and (b) the degassing and discharging stage in which a large, free degassing volume is achieved by a reduction in the screw core, by an enlargement of the screw housing and by adapting the screw diameter to the respective housing diameters in the degassing and discharging stage.