Nancy S Hunt

US Patent:

7217484, May 15, 2007

Filed:

Apr 3, 2006

Appl. No.:

11/396817

Inventors:

Vincenzo Marcello - Webster NY, US
David Kurceba - Hamilton, CA
Nancy Hunt - Webster NY, US
Tie Hwee Ng - Mississauga, CA

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G03G 9/08

US Classification:

4301081, 4301088, 4301103

Abstract:

Disclosed is an oil-less toner composition exhibiting good low temperature release and stripping in fixing, enhanced surface gloss of fixed image, and/or OHP transparency. By controlling one or more properties, such as the relative thermal energy input during the EA aggregation/coalescence process, using a wax having a certain dispersion size (D50), molecular weight and/or melting temperature, the toner particle produced thereby can achieve optimal surface wax protrusion with a surface wax content of about 12 to about 25 weight percent. This is based on the total amount of wax in the toner, as determined by x-ray photoelectron spectroscopy (XPS). The contamination of wax on developing rolls, photoreceptor and carriers, which lowers the reliability of the developer, is suppressed with the present exemplary embodiment.

US Patent:

7569321, Aug 4, 2009

Filed:

Sep 7, 2006

Appl. No.:

11/517598

Inventors:

Vincenzo G. Marcello - Webster NY, US
Steven A. VanScott - Fairport NY, US
Nancy S. Hunt - Ontario NY, US
Chieh-Min Cheng - Rochester NY, US
Dawn M. Jacobs - Webster NY, US

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G03G 9/00

US Classification:

4301102, 4301086, 4301087, 4301088, 43013714

Abstract:

Single component toners having a core with a first latex having a specific glass transition temperature and molecular weight, further having a shell surrounding the core with a second latex having a specific glass transition temperature and molecular weight, and additives added thereto, and processes for producing the same. In embodiments, the toner is a non-magnetic single component toner produced by emulsion aggregation methods.

US Patent:

7691552, Apr 6, 2010

Filed:

Aug 15, 2006

Appl. No.:

11/504322

Inventors:

Vincenzo G. Marcello - Webster NY, US
Steven A. VanScott - Fairport NY, US
Nancy S. Hunt - Ontario NY, US
Cuong Vong - Hamilton, CA
Vladislav Skorokhod - Mississauga, CA
Richard P. N. Veregin - Mississauga, CA
Michael S. Hawkins - Cambridge, CA
Tie Hwee Ng - Mississauga, CA
Daryl W. Vanbesien - Burlington, CA
Christine Deborah Anderson - Hamilton, CA
Liam S. Cummings - Macedon NY, US
Louis V. Isganitis - Rochester NY, US
Allan Chen - Oakville, CA

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G03G 9/093

US Classification:

4301102, 4301093

Abstract:

A toner having a core with a first latex having a specific glass transition temperature, and further having a shell surrounding the core with a second latex having a specific glass transition temperature, and processes for producing the same.

US Patent:

7851116, Dec 14, 2010

Filed:

Oct 30, 2006

Appl. No.:

11/554322

Inventors:

Richard P. N. Veregin - Mississauga, CA
Allan K. Chen - Oakville, CA
Cuong Vong - Hamilton, CA
Vladislav Skorokhod - Mississauga, CA
Eric M. Strohm - Burlington, CA
Michael S. Hawkins - Cambridge, CA
Christine D. Anderson - Hamilton, CA
Richard Fong - Webster NY, US
Nancy S. Hunt - Ontario NY, US
Vincenzo G. Marcello - Webster NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

G03G 9/08

US Classification:

4301086, 4301081, 4301083, 4301093, 4301114, 43011114, 43013714

Abstract:

Toner including toner particles having a calcium-containing material at least in a surface portion of the toner particle, wherein the toner particles contain calcium in an amount of from 20 ppm to about 300 ppm of calcium by dry weight of the toner. Developer including a carrier and a toner, wherein the toner includes toner particles having a calcium-containing material at least in a surface portion of the toner particles. In an emulsion aggregation process for making toner particles, the toner particles are treated with calcium. The addition of calcium to the toner particles improves toner performance by lowering cohesion and charging, thereby generating an image of high gloss.

US Patent:

7910276, Mar 22, 2011

Filed:

Jul 12, 2007

Appl. No.:

11/776777

Inventors:

Karen A. Moffat - Brantford, CA
Juan A. Morales-Tirado - West Henrietta NY, US
Thomas P. Debies - Webster NY, US
Emily L. Moore - Mississauga, CA
Nancy S. Hunt - Ontario NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

G03G 9/00

US Classification:

4301088, 4301093, 4301094, 4301241, 43013714

Abstract:

Disclosed herein are emulsion aggregation toner particles having less than about 15 atomic percent oxygen in relation to a total atomic percent of 100 for all elements on the surface thereof. Such toner particles exhibit lower marks on print defects.

US Patent:

20050136350, Jun 23, 2005

Filed:

Dec 23, 2003

Appl. No.:

10/744791

Inventors:

Vincenzo Marcello - Webster NY, US
David Kurceba - Hamilton, CA
Nancy Hunt - Webster NY, US
Tie Ng - Mississauga, CA

International Classification:

G03G009/00
B01F003/12

US Classification:

430105000, 516077000

Abstract:

Disclosed is an oil-less toner composition exhibiting good low temperature release and stripping in fixing, enhanced surface gloss of fixed image, and/or OHP transparency. By controlling one or more properties, such as the relative thermal energy input during the EA aggregation/coalescence process, using a wax having a certain dispersion size (D50), molecular weight and/or melting temperature, the toner particle produced thereby can achieve optimal surface wax protrusion with a surface wax content of about 12 to about 25 weight percent. This is based on the total amount of wax in the toner, as determined by x-ray photoelectron spectroscopy (XPS). The contamination of wax on developing rolls, photoreceptor and carriers, which lowers the reliability of the developer, is suppressed with the present exemplary embodiment.