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1. (WO1998049389) A PULPING APPARATUS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/049389 International Application No.: PCT/SE1998/000756
Publication Date: 05.11.1998 International Filing Date: 24.04.1998
Chapter 2 Demand Filed: 19.11.1998
IPC:
D21B 1/34 (2006.01)
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
B
FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
1
Fibrous raw materials or their mechanical treatment
04
by dividing raw materials into small particles, e.g. fibres
12
by wet methods, by the use of steam
30
Defibrating by other means
34
Kneading or mixing; Pulpers
Applicants:
CELLWOOD MACHINERY AB [SE/SE]; Storgatan 53 S-571 32 Nässjö, SE (AT, BE, CA, CH, CN, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, JP, LU, MC, NL, NO, PT, SE)
LIIN, Sven [SE/SE]; SE (UsOnly)
Inventors:
LIIN, Sven; SE
Agent:
WENNBORG, Göte ; Kransell & Wennborg AB P.O. Box 27834 S-115 93 Stockholm, SE
Priority Data:
9701606-729.04.1997SE
Title (EN) A PULPING APPARATUS
(FR) APPAREIL TRITURATEUR
Abstract:
(EN) A pulper comprises a rotor (5) mounted in a tub adjacent to a screening plate (4) having holes (4a). The rotor (5) includes helical vanes (5a) whose diameter decreases towards the outer end of the rotor. The rotor vanes (5a) carry in the vicinity of the screening plate a radially and outwardly projecting shoulder-like element (10) having a leading surface (10b) which is generally flat and inclined relative to the screening plate (4) at an angle of 55°-85°, and a trailing part having a reversed wing-profile shape as seen in the direction of rotation. The element forms a pressure-generating and subpressure-generating means which exerts an alternating effect on the pulp as the rotor rotates, therewith counteracting clogging of the holes (4a) in the screening plate. The shoulder-like element (10) may comprise a completely or partially separate element in relation to the rotor, and may be detachable therefrom and replaceable, and also optionally reversible.
(FR) L'invention concerne un triturateur comprenant un rotor (5) qui est monté dans un tube à proximité d'une plaque de criblage (4) dotée de trous (4a). Le rotor (5) comprend des pales (5a) hélicoïdales dont le diamètre est décroissant en direction de l'extrémité extérieure du rotor. Les pales (5a) portent, à proximité de la plaque de criblage, un élément (10) de type épaulement faisant saillie radialement et vers l'extérieur. Cet élément possède une surface antérieure (10b) généralement plate et inclinée de 55°à 85° par rapport à la plaque de criblage (4), et une partie postérieure ayant la forme d'un profil d'aile dans le sens inverse du sens de rotation. L'élément constitue un moyen générateur de pression et de pression négative agissant alternativement sur la pâte à papier lorsque le rotor tourne, réduisant ainsi l'obstruction des trous (4a) de la plaque de criblage. L'élément (10) de type épaulement peut être un élément entièrement ou partiellement séparé du rotor et pouvant être amovible et remplaçable et éventuellement réversible.
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Designated States: CA, CN, JP, NO, US
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: Swedish (SV)
Also published as:
NO19995271EP1015683US6234415JP2001522414 CN1254392CA2288146