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. 25, 1977
Filed:
Jan. 08, 1976
Applicant:
Inventors:
Henry Ellwood, Greater Manchester, EN;
Maurice Rothwell, Greater Manchester, EN;
Assignee:
USM Corporation, Boston, MA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29B / ; B01F / ; B01F / ;
U.S. Cl.
CPC ...
259192 ;
Abstract
An extrusion apparatus for use with thermoplastic materials has a withdrawable rotor which is mounted on a piston motivated carriage, the carriage having anti-vibration mounting members to reduce loads on the rotor. A gaseous vent chamber is operable in conjunction with a reversible extruder screw and a waste mix ejection arrangement, to prevent undesirable contamination or incompletely mixed material from the extruded product.