US4941970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for dividing a suspension of fibrous cellulose pulp
Assignee: KAMYR KARLSTAD SWEDEN A CORP OF SWEDEN AB
•
Filing: 1988-06-16
•
Granted: 1990-07-17
•
Expires: 2008-06-16
Abstract
Abstract In an apparatus for dividing a suspension of fibrous cellulose pulp into a plurality of portions, a closed housing is provided which is divided into two chambers, each provided with at least one inlet and outlet, and in the first chamber a separating device is arranged, rotating at high speed, to separate undesired parts from the suspension via an outlet. An inlet to the second chamber is provided in the form of an opening between the first chamber and the second chamber for transferring the suspension which has been substantially freed from undesired parts. Furthermore, in the second chamber a cylindrical screening device is arranged, connected to the separating device in the first chamber, the separating device and screening device being driven by a common shaft. A support provided with blades cooperates with the screening means to divide the suspension into different fractions which leave the second chamber by individual outlets.
Inventors
- 👤 Bjorn Åhs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:45
CPC Classifications
D; D21; D21D; D21D5/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
184 words
An apparatus for dividing a suspension of fibrous cellulose pulp into a plurality of portions including an undesired parts portion and a remaining portion, the apparatus comprising a closed housing divided into first and second axially aligned chambers having a common longitudinal axis, each provided with inlet and outlet means; a separating means rotatable at high speed in said first chamber to separate the undesired parts portion from the suspension via the outlet means in said first chamber, the inlet means to the second chamber comprising an opening arranged between said first chamber and said second chamber for transferring the remaining suspension portion which has been substantially freed from undesired parts; a cylindrical screening means in said second chamber, connected to said separating means in said first chamber, the separating means and screening means being driven by a common shaft coincident with said longitudinal axis; and a support means in said second chamber provided with blades with which the screening means cooperates to divide the remaining suspension into different fractions which separately leave said second chamber by said outlet means of said second chamber.
Claim 2
Independent Claim
184 words
An apparatus for dividing a suspension of fibrous cellulose pulp into a plurality of portions including an undesired parts portion and a remaining portion, the apparatus comprising a closed housing divided into first and second axially aligned chambers having a common longitudinal axis, each provided with inlet and outlet means; a separating means rotatable at high speed in said first chamber to separate the undesired parts portion from the suspension via the outlet means in said first chamber, the inlet means to the second chamber comprising an opening arranged between said first chamber and said second chamber for transferring the remaining suspension portion which has been substantially freed from undesired parts; a cylindrical screening means in said second chamber, connected to said separating means in said first chamber, the separating means and screening means being driven by a common shaft coincident with said longitudinal axis; and a support means in said second chamber provided with blades with which the screening means cooperates to divide the remaining suspension into different fractions which separately leave said second chamber by said outlet means of said second chamber.
Claim 3
Dependent Claim
19 words
An apparatus as claimed in claim 1 wherein said opening between the two chambers consists of an annular slot.
Claim 4
Dependent Claim
34 words
An apparatus as claimed in claim 2 wherein the annular slot is defined outwardly by a ring separating the two chambers, and radially inwardly by an opposite end portion of the screening means or.
Claim 5
Dependent Claim
30 words
An apparatus as claimed in claim 2 wherein the cross section area of the annular slot is less than the cross section are of the inlet to the first chamber.
Claim 6
Dependent Claim
61 words
An apparatus as claimed in claim 2 wherein the separating means comprises a disc element having a plurality of projections extending substantially radially and laterally aligned with said annular slot, said outlet in said first chamber located in the plane of the disc element, the undesired parts being separated from the suspension by said teeth during rotation of the disc element.
Claim 7
Dependent Claim
47 words
An apparatus as claimed in claim 5 wherein the radial extension of the annular slot is less than the radial extension of said projections, the annular slot being located concentrically within the radial extension of the projections and being covered by the projections in the axial direction.
Claim 8
Dependent Claim
23 words
An apparatus as claimed in claim 5 wherein the inlet to the first chamber is axially displaced in relation to the disc element.
Claim 9
Dependent Claim
19 words
An apparatus as claimed in claim 1 wherein the cellulose pulp being divided lies within the medium concentration range.
Claim 10
Dependent Claim
17 words
An apparatus as claimed in claim 1 wherein said apparatus is mounted in a closed pressure system.
Claim 11
Dependent Claim
29 words
An apparatus as claimed in claim 1 wherein said apparatus is provided with inlet means for the supply of diluting liquid to an injection side of the screening means.
Claim 12
Dependent Claim
38 words
An apparatus as defined in claim 2 wherein the annular slot is defined radially outwardly by a ring separating the two chambers, and radially inwardly by a circular disk arranged between the separating means and the screening means.
Claim 13
Dependent Claim
199 words
An apapratus for dividing a suspension of fibrous cellulose pulp into a plurality of portions including an undesired parts portion and a remaining portion, said apparatus comprising a closed housing divided into first and second chambers, each provided with inlet and outlet means; separating means rotatable at high speed in said first chamber to separate the undesired parts portion from the suspension via the outlet means in the first chamber, the inlet means to the second chamber comprising an opening arranged between said first chamber and said second chamber for transferring said remaining portion of the suspension to said second chamber means; a cylindrical screening means in said second chamber connected to said separating means in said first chamber, the separating means and screening means being driven by a common shaft; a support means in said second chamber provided with blades with which the screening means cooperates to divide the remaining suspension into different fractions which separately leave said second chamber by said outlet means of said second chamber; and said opening consisting of an annular slot defined radially outwardly by a ring separating the two chambers and radially inwardly by an opposite end portion of the screening means.
Claim 14
Dependent Claim
199 words
An apapratus for dividing a suspension of fibrous cellulose pulp into a plurality of portions including an undesired parts portion and a remaining portion, said apparatus comprising a closed housing divided into first and second chambers, each provided with inlet and outlet means; separating means rotatable at high speed in said first chamber to separate the undesired parts portion from the suspension via the outlet means in the first chamber, the inlet means to the second chamber comprising an opening arranged between said first chamber and said second chamber for transferring said remaining portion of the suspension to said second chamber means; a cylindrical screening means in said second chamber connected to said separating means in said first chamber, the separating means and screening means being driven by a common shaft; a support means in said second chamber provided with blades with which the screening means cooperates to divide the remaining suspension into different fractions which separately leave said second chamber by said outlet means of said second chamber; and said opening consisting of an annular slot defined radially outwardly by a ring separating the two chambers and radially inwardly by an opposite end portion of the screening means.
Claim 15
Independent Claim
235 words
An apparatus for dividing a suspension of fibrous cellulose pulp into a plurality of portions including an undesired parts portion and a remaining portion, said apparatus comprising a clsoed housing divided into first and second chambers, each provided with inlet and outlet means the inlet means to the second chamber comprising an opening formed as an annular slot arranged between said first chamber and said second chamber for transferring said remaining portion of the suspension to said second chamber; separating means rotatable at high speed in said first chamber to separate the undesired parts portion from the suspension via the outlet means in the first chamber, wherein the separating means comprises a disc element having a plurality of projections which extend substantially radially and which are laterally aligned with said annular slot, and wherein said outlet means in said first chamber is located in the plane of the disc element, the undesired parts being separated from the suspension by said projections during rotation of the disc element; a cylindrical screening means in said second chamber connected to said separating means in said first chamber, the separating means and screening means being driven by a common shaft; and a support means in said second chamber provided with blades with which the screening means cooperates to divide the remaining suspension into different fractions which separately leave said second chamber by said outlet means of said second chamber.
Claim 16
Independent Claim
235 words
An apparatus for dividing a suspension of fibrous cellulose pulp into a plurality of portions including an undesired parts portion and a remaining portion, said apparatus comprising a clsoed housing divided into first and second chambers, each provided with inlet and outlet means the inlet means to the second chamber comprising an opening formed as an annular slot arranged between said first chamber and said second chamber for transferring said remaining portion of the suspension to said second chamber; separating means rotatable at high speed in said first chamber to separate the undesired parts portion from the suspension via the outlet means in the first chamber, wherein the separating means comprises a disc element having a plurality of projections which extend substantially radially and which are laterally aligned with said annular slot, and wherein said outlet means in said first chamber is located in the plane of the disc element, the undesired parts being separated from the suspension by said projections during rotation of the disc element; a cylindrical screening means in said second chamber connected to said separating means in said first chamber, the separating means and screening means being driven by a common shaft; and a support means in said second chamber provided with blades with which the screening means cooperates to divide the remaining suspension into different fractions which separately leave said second chamber by said outlet means of said second chamber.
Claim 17
Dependent Claim
46 words
An apparatus as claimed in claim 12 wherein the radial extension of the annular slot is less than the radial extension of said projections, the annular slot being located concentrically within the radial extension of projections and being covered by said projections in the axial direction.
Claim 18
Dependent Claim
23 words
An apparatus as claimed in claim 12 wherein the inlet to the first chamber is axially displaced in relation to the disc element.
Claim 19
Dependent Claim
47 words
An apparatus as claimed in claim 13 wherein the radial extension of the annular slot is less than the radial extension of said projections, the annular slot being located concentrally within the radial extension of said projections and being covered by said projections in the axial direction.
Claim 20
Dependent Claim
23 words
An apparatus as claimed in claim 13 wherein the inelt to the first chamber is axially displaced in relation to the disc element.
References Cited (Backward Citations)
US1183297A
Cited
US1946511A
Cited
US3223239A
Cited
US3404065A
Cited
US4231881A
Cited
US4303508A
Cited
US4680108A
Cited
US4737274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |