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:
Jun. 11, 2002
Filed:
Aug. 09, 2000
Kvaarner Pulping AB, , SE;
Abstract
Arrangement for washing and dewatering a fiber pulp suspension, which arrangement comprises two hollow, circular-cylindrical screen members delimited by envelope surface and end walls. The screen members rotate towards each other to form a nip , at least one of the said screen members being arranged in a vat which partially encloses the envelope of the screen member and which, in the direction of rotation of the screen member, converges towards the envelope of the screen member. The invention relates to a sealing arrangement at the end wall of the screen member. By retracting the seal a distance X from the envelope surface of the screen member in a limited area &agr; near the nip , the seal is relieved of the very high hydraulic and mechanical pressures which occur in the nip. Wear between the end wall of the drum and the seal at the press nip is reduced. A simple pressurized seal can thus be used with the same low pressure applied along the entire circumference.