Gay L Herman

US Patent:

6546221, Apr 8, 2003

Filed:

Apr 19, 2002

Appl. No.:

10/127236

Inventors:

James A. Baker - Hudson WI
Gay L. Herman - Cottage Grove MN
Robert E. Brenner - New Richmond WI
Kam W. Law - Woodbury MN

Assignee:

Samsung Electronics Co. Ltd. - Suwon

International Classification:

G03G 1510

US Classification:

399237, 399238, 430117

Abstract:

A developer storage and delivery system for liquid electrophotography having: (a) an insulating substrate with a first surface and a second surface; (b) a plurality of discrete conductive heating elements mounted on the first surface; and (c) a phase change developer having a melting point of at least 22Â C. , wherein the phase change developer is on the top surface of each of the discrete conductive heating elements, except that a small portion of both ends of each of the conductive heating elements is free of the phase change developer for conducting electricity.

US Patent:

6647234, Nov 11, 2003

Filed:

Apr 19, 2002

Appl. No.:

10/127232

Inventors:

Gay L. Herman - Cottage Grove MN
James A. Baker - Hudson WI
Eric D. Dalzell - North St. Paul MN
Manuel Lozada - New Brighton MN
Brian P. Teschendorf - Vadnais MN

Assignee:

Samsung Electronics Co., Ltd. - Suwon

International Classification:

G03G 1510

US Classification:

399238, 430114, 430116, 430117

Abstract:

This invention relates to a developer storage and delivery system for liquid electrophotography containing: a) a container having an open end; b) a developer inside said container wherein said developer has a viscosity greater than 10 pascal second; and c) a heater near said open end wherein said heater lower the viscosity of said developer to less than 0. 01 pascal second.

US Patent:

6649316, Nov 18, 2003

Filed:

Apr 19, 2002

Appl. No.:

10/127062

Inventors:

James A. Baker - Hudson WI
Julie Y. Qian - Woodbury MN
Gay L. Herman - Cottage Grove MN

Assignee:

Samsung Electronics Co. Ltd - Suwon

International Classification:

G03G 9135

US Classification:

430114, 430115, 430124, 430126

Abstract:

This invention relates to a phase change developer comprising: (a) a carrier having a Kauri-butanol number less than 30; and (b) an organosol comprising a graft (co)polymeric steric stabilizer covalently bonded to a thermoplastic (co)polymeric core that is insoluble in said carrier, and said (co)polymeric steric stabilizer comprises a crystallizing polymeric moiety that independently and reversibly crystallizes at or above 30Â C. , wherein said phase change developer has a melting point at or above 22Â C.

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:

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:

6898403, May 24, 2005

Filed:

Mar 28, 2003

Appl. No.:

10/402553

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:

G03G015/10
G03G015/16

US Classification:

399249, 399302

Abstract:

A liquid electrophotographic imaging apparatus contains at least one drying sheet for removing excess carrier liquid from an intermediate transfer member or an intermediate image on the intermediate transfer member. The drying sheet comprises a flexible substrate having a first surface and second surface, at least one carrier liquid absorptive layer on the first surface of the flexible substrate, and the first surface facing the intermediate transfer member or image. A method of drying a toner image or intermediate transfer material comprises a) providing a plurality of absorbent drying sheets in a cartridge, wherein the sheets are stacked such that there is a top of the stack and a bottom of the stack; b) providing an electrophotographic apparatus comprising at least i) an intermediate transfer member, and ii) a cartridge of stacked drying sheets; c) providing a toned image on the intermediate transfer member; d) contacting an absorbent drying sheet from the cartridge to the intermediate transfer member or to the toned image on the intermediate transfer member, the drying sheet on absorbing liquid carrier becoming a used drying sheet; and e) replacing the used drying sheet at the top of the stack in the absorbent drying sheet cartridge for re-supply or discard.

US Patent:

7005225, Feb 28, 2006

Filed:

Jun 30, 2003

Appl. No.:

10/612535

Inventors:

Julie Y. Qian - Woodbury MN, US
Gay L. Herman - Cottage Grove MN, US
James A. Baker - Hudson WI, US

Assignee:

Samsung Electronics Company - Suwon

International Classification:

G03G 9/00

US Classification:

4301091, 4301102, 4301114, 43013712, 43013717

Abstract:

The present invention relates to amphipathic copolymeric binder particles that incorporate polymerizable crystallizable compounds chemically incorporated into a dispersible (D) portion and/or solvatable (S) portion of the copolymer. The invention also pertains to dry particulate electrophotographic toners incorporating an amphipathic copolymer comprising one or more polymerizable crystallizable compounds. Methods of making these dry electrophotographic toner particles, and methods of electrophotographically forming an image on a substrate using these toners, are also described.