D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
182/105
D21D 5/04 (2006.01) B01D 29/15 (2006.01) B01D 33/06 (2006.01) B01D 33/073 (2006.01) B01D 36/02 (2006.01) D21D 5/02 (2006.01) B01D 29/46 (2006.01)
Patent
CA 1328232
AN APPARATUS FOR SCREENING A SUSPENSION OF FIBROUS CELLULOSE MATERIAL Abstract of the Disclosure An apparatus for screening a suspension of fibrous cellulose mate- rial containing undigested wood comprises a shaft rotating in a housing and an elongate screening means disposed in a screening chamber, said screening means comprising a stationary screening member and a rotating screening member connected to said 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 con- nected to the shaft for common rotation therewith. The apparatus enables digested pulp to be screened without dilution.
614213
Fetherstonhaugh & Co.
Kvaerner Pulping Aktiebolag
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