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. 24, 1991
Filed:
Jan. 04, 1990
Ronny Hoglund, Skoghall, SE;
Kamyr AB, Karlstad, SE;
Abstract
An apparatus for screening a suspension of fibrous cellulose material containing undigested wood comprising a shaft rotating in a housing and an elongate screen disposed in a screening chamber. This screen comprises a stationary screening member and a rotating screening member connected to the shaft. Each of the screening members comprises a plurality of parallel rings disposed with predetermined axial distance from each other to form circumferential openings, the rings of the stationary screening member and the rotating screening member being arranged to partially close each other's openings between the rings to define circumferential screening gaps therebetween. According to the invention the stationary screening member is in the form of a unitary body rigidly connected to the housing so that at least circumferential movement is prevented. The rotating screening member is likewise in the form of a unitary body but it is connected to the shaft for common rotation therewith. The apparatus enables digested pulp to be screened without dilution.