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:
Sep. 29, 1992
Filed:
Oct. 31, 1990
Applicant:
Inventors:
Paul G Andersen, Warwick, NY (US);
Kai L Kite-Powell, Mahwah, NJ (US);
Assignee:
Werner & Pfleiderer Corp., Ramsey, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ; B29B / ;
U.S. Cl.
CPC ...
425204 ; 100 / ; 159-22 ; 26421123 ; 264349 ; 425203 ; 425208 ; 366 77 ; 366 88 ;
Abstract
An apparatus for extracting a liquid from a workable mass of material includes a first screw section for transporting the material, a second screw section which applies a force on the material in a direction generally opposite that of the transport direction, and a second screw extruder at or near a liquid extraction location which provides a pinch point on the material. The pinch point substantially eliminates liquid flow countercurrent to the material transport direction.