Paul W Andersen

US Patent:

52326497, Aug 3, 1993

Filed:

May 6, 1992

Appl. No.:

7/878930

Inventors:

Paul G. Andersen - Warwick NY
Kai L. Kite-Powell - Mahwah NJ

Assignee:

Werner & Pfleiderer - Ramsey NJ

International Classification:

B29C 4762
B29B 784

US Classification:

26421123

Abstract:

To extract a liquid from a workable mass of material a first force is applied to the material in a first direction. A second opposed force is applied to the material within or slightly downstream of a liquid-extraction location. These opposed forces tend to compact the material to extract the liquid. The extracted liquid moves out of the liquid-extraction location along a path which extends generally transverse to the direction of the first and second forces. Third forces are applied to the material along the path in a direction generally opposite to that taken by the exiting liquid to prevent the material from traversing the path but to permit the liquid to exit. The first, second and third forces form a pinch point on the material within or slightly downstream of the liquid-extraction location to substantially obviate liquid flow countercurrent to the direction of the first force.

US Patent:

51510260, Sep 29, 1992

Filed:

Oct 31, 1990

Appl. No.:

7/606561

Inventors:

Paul G. Andersen - Warwick NY
Kai L. Kite-Powell - Mahwah NJ

Assignee:

Werner & Pfleiderer Corp. - Ramsey NJ

International Classification:

B29C 4762
B29B 784

US Classification:

425204

Abstract:

An apparatus for extracting a liquid from a workable mass of material includes a first screw section for transporting the material, a second screw section which applies a force on the material in a direction generally opposite that of the transport direction, and a second screw extruder at or near a liquid extraction location which provides a pinch point on the material. The pinch point substantially eliminates liquid flow countercurrent to the material transport direction.

US Patent:

61167711, Sep 12, 2000

Filed:

Feb 5, 1999

Appl. No.:

9/245242

Inventors:

Paul G. Andersen - Warwick NY

Assignee:

Krupp Werner & Pfleiderer Corporation - Ramsey NJ

International Classification:

B21C 106
B29B 714
B29B 720

US Classification:

366 85

Abstract:

A single flighted multi-screw conveying bushing that has only one helical screw element extending the length of the bushing. The bushing has a cross-section shape that has a segmented circular base and a lobe extending from the base. The lobe has a truncated crest that is sized to have a circumferential angle of from 15. degree. to 30. degree. and preferably from 22. degree. to 24. degree. Also, a twin screw extruder having a pair of side by side drive shafts with at least two of the single flighted screw bushings mounted end to end on each shaft.

US Patent:

61709751, Jan 9, 2001

Filed:

Apr 21, 1999

Appl. No.:

9/295945

Inventors:

Paul Andersen - Warwick NY

Assignee:

Krupp Werner & Pfleiderer - Ramsey NJ

International Classification:

B29B 748

US Classification:

366 82

Abstract:

There is provided a multi-shaft kneading disc, kneading disc block, and a multi-shaft extruder containing the same. The kneading disc and each kneading disc in the kneading disc block having a disc shape with a central section defining an extruder shaft mounting bore and at least one lobe extending radially from said central section and having a crest end. The at least one lobe has a radius X which defines an outer diameter of the kneading disc. The central section has a radius Y which defines an inner diameter of the kneading disc. At least one other lobe extends radially from the central section and has a radius Z. The radius Z defines the outer diameter of at least one other lobe. The radius Z of the other lobe is equal to Y+7/8(X-Y) to Y+1/4(X-Y).