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. 22, 2012
Filed:
Apr. 16, 2008
Peter Svedberg, Alnö, SE;
Peter Svedberg, Alnö, SE;
Metso Paper, Inc., , FI;
Abstract
A screw pipe unit intended to cooperate with and at least partly enclose a screw in a plug screw feeder for cellulose chips/pulp is provided. The screw pipe unit comprises a plurality of openings for filtrate dewatered from the chips/pulp in the screw pipe when the plug screw feeder is in operation. The screw pipe is, on at least a portion of its inner surface, provided with bars inclined with respect to the longitudinal axis of the screw pipe. The angle of inclination of the bars decreases in the longitudinal direction, from a first portion of the screw pipe unit with maximum inclination to a second portion of the screw pipe unit with bars substantially parallel to the axis, the second portion being further away from the inlet end of the screw pipe unit than the first portion.