Michael W Schuster

US Patent:

55323081, Jul 2, 1996

Filed:

Jan 17, 1995

Appl. No.:

8/373706

Inventors:

Michael A. Schuster - Jacksonville FL
John C. Harrington - Jacksonville FL
Wen P. Liao - Warminster PA
Fu Chen - Newtown PA

Assignee:

Betz PaperChem, Inc. - Jacksonville FL

International Classification:

C08L 5106
D21H 1737

US Classification:

524447

Abstract:

A composition and method for improving the drainage and retention characteristics of a paper furnish consisting of a water soluble graft copolymer and bentonite clay. It is preferred that the graft copolymer be added to the furnish prior to at least one shear stage and that the bentonite clay be added after the shear stage.

US Patent:

56267185, May 6, 1997

Filed:

Sep 16, 1994

Appl. No.:

8/307969

Inventors:

Irenee J. Philippe - Jacksonville FL
Frank J. Sutman - Jacksonville FL
Thomas E. Taggart - Jacksonville FL
Mary B. K. Letscher - Jacksonville FL
Michael A. Schuster - Jacksonville FL
John C. Harrington - Jacksonville FL

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

D21C 902

US Classification:

162 60

Abstract:

The present invention is directed to a method for increasing the retention on a washing/thickening device in an aqueous papermaking system. The method generally comprises adding to the furnish solids of the system an effective amount of a cationic polyacrylamide polymer.

US Patent:

50613464, Oct 29, 1991

Filed:

Sep 2, 1988

Appl. No.:

7/240774

Inventors:

Thomas E. Taggart - Jacksonville FL
Michael A. Schuster - Jacksonville FL
Alan J. Schellhamer - Jacksonville FL

Assignee:

Betz PaperChem, Inc. - Jacksonville FL

International Classification:

D21H 1729

US Classification:

162175

Abstract:

A process of making paper by forming a paper furnish comprised of cellulosic fibers or cellulosic fibers and mineral filler material suspended in water, depositing the furnish on a papermaking wire, and forming a sheet out of the solid components of the furnish while carried on the wire, the improvement wherein there is mixed into the furnish, prior to its being deposited on the wire, about 0. 50 to 5 percent of cationic starch (based on the dry weight of total solids in the furnish) followed by about 5 to 20 percent of a water soluble carboxymethyl) cellulose (based on the weight of the cationic starch).

US Patent:

54825954, Jan 9, 1996

Filed:

Mar 22, 1994

Appl. No.:

8/215983

Inventors:

John C. Harrington - Jacksonville FL
Michael A. Schuster - Jacksonville FL

Assignee:

Betz PaperChem, Inc. - Jacksonville FL

International Classification:

D21H 2110

US Classification:

1621683

Abstract:

A method of improving the drainage characteristics of a pulp slurry in a papermaking operation utilizing the sequential steps of adding alum, ionic polyacrylamide and cationic starch. The cationic starch can be added to the slurry prior to or after the primary screen.

US Patent:

54157404, May 16, 1995

Filed:

Mar 24, 1994

Appl. No.:

8/217037

Inventors:

Michael A. Schuster - Jacksonville FL
John C. Harrington - Jacksonville FL
Wen P. Liao - Warminster PA
Fu Chen - Newtown PA

Assignee:

Betz PaperChem, Inc. - Jacksonville FL

International Classification:

D21H 1737

US Classification:

1621683

Abstract:

A composition and method for improving the drainage and retention characteristics of a paper furnish consisting of a water soluble graft copolymer and bentonite clay. It is preferred that the graft copolymer be added to the furnish prior to at least one shear stage and that the bentonite clay be added after the shear stage.

US Patent:

47658673, Aug 23, 1988

Filed:

Jul 2, 1986

Appl. No.:

6/881379

Inventors:

David D. Dreisbach - Jacksonville FL
Gilbert S. Gomes - Jacksonville FL
Michael A. Schuster - Jacksonville FL

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

D21C 320

US Classification:

162 72

Abstract:

The invention relates to a process for controlling pitch deposition from pulp in papermaking systems which comprises adding to the pulp an effective amount of a water-soluble quaternized polyamine ionene polymer.

US Patent:

53145810, May 24, 1994

Filed:

Dec 10, 1991

Appl. No.:

7/805266

Inventors:

John T. Lin - Jacksonville FL
Michael A. Schuster - Jacksonville FL
Richard A. Hobirk - Jacksonville FL
Alan J. Schellhamer - Jacksonville FL

Assignee:

Betz PaperChem, Inc. - Jacksonville FL

International Classification:

D21C 700
G01N 1100

US Classification:

162263

Abstract:

An apparatus and method to simultaneously evaluate the drainage, retention and formation characteristics of paper pulp comprising mixing the paper pulp furnish in the top chamber of the apparatus, releasing the furnish into a middle chamber via a valve having a cone shaped structure for even distribution of the furnish onto a wire screen, and utilizing a time delay before opening a vent valve in order to attenuate impingement forces. The apparatus utilizes a rotating blade under the wire screen to duplicate the pulsation forces of full scale papermaking equipment, an externally applied means to assist in the removal of water similar to a paper machine couch roll. Data generated during the foregoing steps is fed into a computer to evaluate the entire free water drainage process of the furnish. The device is able to set parameters to simulate the water removal process on most paper machines via level control and duration of pertinent variables.

US Patent:

51044870, Apr 14, 1992

Filed:

Aug 16, 1990

Appl. No.:

7/568396

Inventors:

Thomas E. Taggart - Jacksonville FL
Michael A. Schuster - Jacksonville FL
Alan J. Schellhamer - Jacksonville FL

Assignee:

Betz Paper Chem., Inc. - Jacksonville FL

International Classification:

D21H 1741

US Classification:

1621683

Abstract:

The present invention is directed to a paper having improved properties, a process of producing the paper, and compositions used in the process of producing the paper. The invention generally comprises using a cationic starch in combination with a naturally anionic polysaccharide gum.