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. 01, 1985
Filed:
Apr. 29, 1983
Applicant:
Inventors:
Peter Hold, Milford, CT (US);
Marc A Rizzi, Orange, CT (US);
Assignee:
USM Corporation, Farmington, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29B / ;
U.S. Cl.
CPC ...
366 75 ; 159-22 ; 366 90 ; 366305 ; 366307 ; 425203 ; 425812 ;
Abstract
An extruder including a devolatilizing section having helical channels formed in the barrel and having a cylindrical rotor closing the inner sides of the channels. Material is fed onto the rotor surface which rotates and forms the material into one or more rolling banks engaging only the upstream flank of the channels and the rotor surface. Helical vent slots pass through the barrel into each channel at the downstream flanks not occupied by the rolling bank.