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:
May. 31, 1983
Filed:
Sep. 03, 1980
Applicant:
Inventor:
Wilhelm Hanslik, Vienna, AT;
Assignee:
American Maplan Corporation, McPherson, KS (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29B / ;
U.S. Cl.
CPC ...
425204 ; 264D / ; 366 83 ; 366 84 ; 425205 ; 425D / ;
Abstract
An extruder for thermoplastic or elastomeric materials has a mastication stage with one or more feedscrews preceded by a preheating zone in which the incoming bulk material is circulated and possibly recirculated by two screw-type conveyor members or augers in a loop within a heated extension of the extruder housing. The augers may be counterrotatingly disposed in two juxtaposed cylindrical compartments or may be coaxially nested and corotating with opposite pitch.