Charles E Simpson

US Patent:

6342324, Jan 29, 2002

Filed:

Feb 16, 2000

Appl. No.:

09/504461

Inventors:

Minyu Li - Oakdale MN
M. Zaki Ali - Mendota Heights MN
Eric D. Morrison - St. Paul MN
Charles W. Simpson - Lakeland MN
Leonard J. Stulc - Shafer MN
Ramnath Subramaniam - St. Paul MN
Jiayi Zhu - Woodbury MN

Assignee:

Imation Corp. - Oakdale MN

International Classification:

G03G 5147

US Classification:

430 67, 430 66, 430132

Abstract:

Release compositions include (a) from zero to about 30 parts by weight of a polymer selected from the group consisting of wherein R , R , R , R , R , R , R , and R are each independently selected from an alkyl group, an alkenyl group, an aryl group, and an aralkyl group, such that at least one of R and R is an alkenyl group, l, m, and n are each independently an integer so long as the polymer contains greater than 3 mol % vinyl-containing siloxane groups; a (vinyl siloxy)(siloxy)-modified silica having a vinyl content of at least about 0. 4 vinyl equivalent/kg; and a combination thereof; (b) more than about 20 parts by weight of a polymer having the formula wherein R , R , R , R , R , R , R , and R are each independently selected from an alkyl group, an alkenyl group, an aryl group, and an aralkyl group, such that at least two of R , R , R , R , R , R , R , and R are alkenyl groups, p, q, and r are each independently integers so long as the polymer has less than 3 mol % vinyl-containing siloxane groups; and (c) up to about 20 parts by weight of a cross-linking agent of the formula wherein R , R , R , R , R , and R are each independently selected from hydrogen, an alkyl group, an aryl group, and an aralkyl group, X is O, or a divalent organic linking group, and s and t are independently integers so long as there are at least two functional groups capable of cross-linking per molecule.

US Patent:

6720025, Apr 13, 2004

Filed:

Jul 1, 2002

Appl. No.:

10/186809

Inventors:

Robert A. Yapel - Oakdale MN
Wayne P. Ray - Weatherford OK
David J. Scanlan - Ventura CA
Larry A. Lien - Woodbury MN
Charles W. Simpson - Lakeland MN

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

B08D 126

US Classification:

427 9, 427356, 427358

Abstract:

A method of slot extrusion coating is provided that can be used to apply thin coatings using liquid compositions having high percent solids. A window of operability advantageously identifies the limits of a process to provide these thin high solids coatings. The window of operability is determined by obtaining a first graphical curve representing actual values of wet thickness as a function of percent solids level. The critical wet thickness is then identified on the first graphical curve. The window of operability is identified as an area defined by the boundaries: percent solids greater than the point at which critical wet thickness occurs, an actual wet thickness greater than all points above the first graphical curve and equal to or less than the critical thickness.

US Patent:

6752853, Jun 22, 2004

Filed:

Oct 31, 2002

Appl. No.:

10/286406

Inventors:

Charles W. Simpson - Lakeland MN
James A. Baker - Hudson WI
A. Kristine Fordahl - Hopkins MN
Susan E. Hill - Woodbury MN

Assignee:

Samsung Electronics Co., Ltd. - Suwon

International Classification:

B01D 5304

US Classification:

95143, 96132, 96135, 96142, 96153, 55515, 55519

Abstract:

A method and apparatus of the invention includes a method of removing airborne hydrocarbons from liquid electrophotographic printer exhaust comprises generating airborne hydrocarbon droplets as either vapor or mist during the transportation of electrophotographic ink or toner, directing substantially all of the air and hydrocarbon droplet mixture to a central collection point, forcing the air/droplet mixture to and through an oleophilic, substantially non-leaching collection media, and exhausting substantially hydrocarbon-free air from the electrophotographic printer. The method may further comprise inducing pressure in the printer with air pressure reduction to pull the exhaust through the collection media, for example with a pump or fan used to produce air pressure reduction. The method may comprise inducing airflow in the printer with ventilation holes or by the addition of a fan to provide a fresh air inlet. The air/hydrocarbon mixture may be directed to the collection media by a transportation system.

US Patent:

6785495, Aug 31, 2004

Filed:

May 2, 2003

Appl. No.:

10/428496

Inventors:

James A. Baker - Hudson WI
Gay L. Herman - Cottage Grove MN
Charles W. Simpson - Lakeland MN

Assignee:

Samsung Electronics Co., Ltd. - Suwon

International Classification:

G03G 1510

US Classification:

399249

Abstract:

A liquid electrophotographic imaging apparatus contains at least one drying element for removing excess carrier liquid in a liquid toner toned latent image on an intermediate transfer member surface or from the intermediate transfer member surface itself. The drying sheet includes a flexible substrate having a first surface and second surface; at least one oleophilic carrier liquid absorptive layer on the first surface of the flexible substrate; and the first surface of the flexible substrate facing the intermediate transfer member surface, latent image or liquid toned latent image. A method of using this apparatus includes providing at least one absorbent drying sheet; providing an electrophotographic apparatus including at least an intermediate transfer member; at least one supply container and at least one discard container for the at least one absorbent drying sheet; providing a toned image on the intermediate transfer member with a liquid toner; contacting an absorbent drying sheet from the supply container to the toned image on the intermediate transfer member or to the intermediate transfer member itself after the image is transferred away; absorbing liquid carrier with the drying sheet, the drying sheet then becoming a used drying sheet; determining whether the used drying sheet is suitable for reuse as an absorbent drying sheet; and placing the used drying sheet in a container.

US Patent:

6816693, Nov 9, 2004

Filed:

Mar 28, 2003

Appl. No.:

10/402473

Inventors:

James A. Baker - Hudson WI
Gay L. Herman - Cottage Grove MN
Charles W. Simpson - Lakeland MN

Assignee:

Samsung Electronics Co. Ltd. - Suwon

International Classification:

G03G 1510

US Classification:

399249, 399343, 399348

Abstract:

A liquid electrophotographic imaging apparatus contains at least one drying sheet for removing excess carrier liquid in a liquid toner toned latent image on a photoconductor surface. The drying sheet comprises a flexible substrate having a first surface and second surface; at least one oleophilic carrier liquid absorptive layer on the first surface of the flexible substrate; and the first surface of the flexible substrate facing said photoconductor surface, latent image or liquid toned latent image. The apparatus may perform a process of providing a toned image on the photoconductor with a liquid toner; contacting an absorbent drying sheet from the supply container to the toned image on the photoconductor or to the photoconductor itself after the image is transferred away; absorbing liquid carrier with the drying sheet, the drying sheet then becoming a used drying sheet; determining whether the used drying sheet is suitable for reuse as an absorbent drying sheet; and placing the used drying sheet in a container.

US Patent:

6832064, Dec 14, 2004

Filed:

Dec 10, 2001

Appl. No.:

10/013635

Inventors:

Charles W. Simpson - Lakeland MN
Leonard J. Stulc - Shafer MN

Assignee:

Samsung Electronics Co., Ltd. - Suwon

International Classification:

G03G 1511

US Classification:

399249, 428421, 428447, 4273855, 427387

Abstract:

A drying belt for electrophotographic imaging process comprising: (a) a seamless substrate; and (b) an absorbent layer on the seamless substrate wherein the absorbent layer comprising an absorbing material for carrier liquid of an electrophotographic toner.

US Patent:

6885839, Apr 26, 2005

Filed:

May 2, 2003

Appl. No.:

10/428534

Inventors:

James A. Baker - Hudson WI, US
Gay L. Herman - Cottage Grove MN, US
Charles W. Simpson - Lakeland MN, US

Assignee:

Samsung Electronics Co., Ltd. - Suwon

International Classification:

G03G015/11
G03G015/10

US Classification:

399251, 399249

Abstract:

A method of drying carrier liquid from a toner image on a photoreceptor or from a photoreceptor after transfer to a final substrate comprises providing an electrophotographic apparatus comprising at least a) a photoreceptor, b) a continuous absorbent drying sheet having a beginning and an end, the beginning attached to a take-up roll or spool and the end attached to a supply roll or spool, the intermediate portion thereof coiled around the supply spool with at least a portion of the sheet contacting the photoreceptor. The process includes providing a toned image on the photoreceptor; contacting the continuous absorbent drying sheet to the toned image on the photoreceptor, or to the photoreceptor itself after the image is transferred away, creating a used portion of the continuous absorbent drying sheet; and simultaneously disbursing fresh length of the continuous absorbent drying sheet and taking-up the used portion of the continuous drying sheet.

US Patent:

6887558, May 3, 2005

Filed:

Oct 31, 2002

Appl. No.:

10/284930

Inventors:

Charles W. Simpson - Lakeland MN, US
Leonard J. Stulc - Shafer MN, US

Assignee:

Samsung Electronics Co., Ltd. - Suwon

International Classification:

B32B027/14
B32B003/00

US Classification:

4281951, 428421, 428447

Abstract:

This invention related to an intermediate transfer member for electrophotography that includes a substrate; and a polymeric layer on said substrate wherein the polymeric layer comprises an organic titanate and a polymer selected from the group consisting of fluorosilicone, silicone, and a combination thereof.