Roland O A Fjallstrom, Age 78PO Box 160, Sautee Nacoochee, GA 30571

5443737, Aug 22, 1995

Mar 26, 1993

7/966195

Roland Fjallstrom - Lawrenceville GA
Rune Frykhult - Stockholm, SE
Charles Atkeison - Norcross GA

Celleco Hedemora AB - Stockholm

B01D 3306

2103601

A separation device for suspensions comprises a housing (1), a filter body (3) with a wall of filter material situated in the housing, spray means (14) adapted to spray jets of a suspension to be separated directly onto one side of the wall of filter material, and means (4, 6) for displacing the filter body relative to the spray means. According to the invention the filter body forms a substantially circular cylindrical drum (3) with a vertical center axis, the circumferential wall of the drum comprises said wall of filter material. Further, said displacement means (4, 6) is adapted to turn said cylindrical drum about said vertical center axis during operation.

5441157, Aug 15, 1995

Jan 12, 1994

8/119222

Roland Fjallstrom - Lawrenceville GA

Celleco Hedemora AB - Stockholm

B07B 108

209271

A suspension containing fine and coarse particles is sprayed under high pressure by way of spray nozzles (10) against a rotating filter medium (7), so that the suspension is separated into a fine fraction, which passes through the filter medium and which contains said fine particles, and a coarse fraction, which does not pass through the filter medium and which contains said coarse particles. According to the invention the filter medium (7) is rotated by way of a drive motor (6) at a speed such that coarse particles and liquid developing on the side of the filter medium are removed from the filter medium substantially as the result of the centrifugal force the coarse particles and liquid are subjected to. In consequence the filter medium is efficiently kept clean during operation, which increases the capacity and improves the separation efficiency.

5814187, Sep 29, 1998

Apr 14, 1993

8/045684

Roland Fjallstrom - Lawrenceville GA

Alfa Laval Celleco AB - Tumba

D21C 502

162 4

An apparatus for treating a pulp slurry of waste paper including long fibers, short fibers and large and fine impurities includes the step of spraying the slurry through a gaseous medium upon a screen to separate long fibers and large impurities from small fibers and fine impurities.

4676809, Jun 30, 1987

Sep 11, 1985

6/774949

Roland Fjallstrom - Lawrenceville GA
Rune Frykhult - Stockholm, SE

Celleco AB - Stockholm

B01D 1900

55204

In a hydrocyclone plant for separating a fiber pulp suspension into a light phase and a heavy phase, comprising at least two hydrocyclones (1, 2) connected in series, there is provided a device (20) arranged both for degassing a first stream of separated heavy phase coming from one of said hydrocyclones (1) and a second stream of liquid supplied to dilute the first stream, and for mixing said two streams before they are supplied to the other one of said hydrocyclones (2).

5124029, Jun 23, 1992

Jul 23, 1990

7/543807

Roland Fjallstrom - Lawrenceville GA
Rune Frykhult - Stockholm, SE

Celleco AB - Stockholm

B07B 108
B07B 150
D21D 502

209250

A device for fractionating pulp suspensions has a series of vertical filter sheets attached to a horizontal shaft. Suspension is sprayed against the sheets to effect a separation of coarse and fine solids. Cleansing liquid is also sprayed against the sheets to keep the filter holes open and the fabric sheets are movable with respect to the sprays.

5296098, Mar 22, 1994

Dec 10, 1991

7/778082

Roland Fjallstrom - Lawrenceville GA

Celleco Hedemora AB - Stockholm

B07B 118

162 55

A fibre suspension is separated by a filter device having a hollow filter body (1) with a wall (2) of filter material, and a container (3). The entire fibre suspension to be separated is sprayed in the form of at least one liquid jet onto said wall (2) to force a fine fraction of the suspension containing most of said undesired particles through said wall of filter material into the hollow filter body, thereby leaving a created coarse fraction of the fibre suspension mainly containing fibres in the container outside the filter body. Relative displacement between the liquid jet and the filter material is provided. Said created coarse fraction is dewatered through the wall of filter material, and said dewatered coarse fraction is discharged from the container.