John J Ianni

US Patent:

6358657, Mar 19, 2002

Filed:

Aug 16, 2001

Appl. No.:

09/930501

Inventors:

Scott M. Silence - Fairport NY
Joo T. Chung - Webster NY
James M. Proper - Webster NY
John J. Ianni - Medina NY
Jeffrey H. Sokol - Pittsford NY
Hui Chang - Pittsford NY

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G03G 9087

US Classification:

4301094, 430 45

Abstract:

A toner having a high colorant concentration and a binder resin that includes a polyester resin having linear portions and crosslinked portions of high density crosslinked microgel particles has a melt flow index value of about 11ÂMFI units. The binder resin may also include a mixture of two polyester resins having different MFI values.

US Patent:

6359105, Mar 19, 2002

Filed:

Oct 26, 2000

Appl. No.:

09/695861

Inventors:

John James Ianni - Medina NY
J. Stephen Kittelberger - Rochester NY
Daniel Andrew Harrington - Walworth NY
Eugene Frederick Young - Rochester NY
Hui Chang - Pittsford NY
Nilmarie Santos-Roman - Penfield NY
Dennis J. OKeefe - Ontario NY
Joseph Louis Leonardo - Penfield NY
Paul Lynn Jacobs - Webster NY
Kiran B. Sheth - Penfield NY
Dongming Li - Fairport NY
Robert Edward Lutz - Webster NY
Yelena Lipovetskaya - Rochester NY

Assignee:

Xerox Corporation - Stamford CT

International Classification:

C08G 6302

US Classification:

528272, 528271

Abstract:

Cross-linked toner resin having linear portions and cross-linked portions of high density microgel particles, where the toner resin is an unsaturated polyester resin, is prepared using a liquid chemical initiator such as 1,1-bis(t-butyl peroxy)-3,3,5-trimethylcyclohexane so that the cross-linked resin achieved contains less than 0. 20 percent by weight of acids. In particular, the cross-linked toner resin is free of benzoic acid. The method of making the cross-linked toner resin includes (a) spraying the liquid chemical initiator onto the unsaturated polyester resin prior to, during or subsequent to melting of the unsaturated polyester resin to form a polymer melt; and (b) subsequently cross-linking the polymer melt under high shear to form the cross-linked toner resin.

US Patent:

7604915, Oct 20, 2009

Filed:

Aug 23, 2006

Appl. No.:

11/508365

Inventors:

Joo T. Chung - Webster NY, US
Scott M. Silence - Fairport NY, US
Julia Kohlmeier - Penfield NY, US
John Ianni - Medina NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

G03G 9/08

US Classification:

4301084, 4301081, 43011141, 4301372

Abstract:

Use of a charge control agent in a toner, such as a magenta toner, to give an increased triboelectric charge is disclosed. The magenta toner may contain a magenta resin, such as xanthene. The charge control agent is a styrene-acrylate polymer, such as the following polymer of Formula II:.

US Patent:

7838192, Nov 23, 2010

Filed:

Apr 24, 2007

Appl. No.:

11/789419

Inventors:

Mark Scheuer - Williamson NY, US
Mark Petrush - Webster NY, US
James Winters - Alfred Station NY, US
John Ianni - Medina NY, US
Julia Kohlmeier - Penfield NY, US
William Hollenbaugh, Jr. - Rochester NY, US
Kip Jugle - Bloomfield NY, US
Jeffrey McEwen - Williamson NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

G03G 9/00

US Classification:

4301071

Abstract:

According to embodiments illustrated herein, there is provided a black toner having a resin, an optional additive, and at least two or more colored pigments, and the at least two or more colored pigments are selected from the group consisting of a blue pigment, a green pigment, a red pigment, a magenta pigment, a cyan pigment, a yellow pigment, a white pigment, and mixtures thereof, and the black toner has a calorimetric value L* of about less than 30.

US Patent:

8232035, Jul 31, 2012

Filed:

Aug 26, 2010

Appl. No.:

12/869613

Inventors:

Mark Scheuer - Williamson NY, US
Mark Petrush - Webster NY, US
James Winters - Alfred Station NY, US
John Ianni - Medina NY, US
Julia Kohlmeier - Penfield NY, US
William Hollenbaugh, Jr. - Rochester NY, US
Kip Jugle - Bloomfield NY, US
Jeffrey McEwen - Williamson NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

G03G 9/08

US Classification:

4301081, 4301091

Abstract:

According to embodiments illustrated herein, there is provided a black toner having a resin, an optional additive, and at least two or more colored pigments, and the at least two or more colored pigments are selected from the group consisting of a blue pigment, a green pigment, a red pigment, a magenta pigment, a cyan pigment, a yellow pigment, a white pigment, and mixtures thereof, and the black toner has a colorimetric value L* of about less than 30.

US Patent:

57509093, May 12, 1998

Filed:

Feb 6, 1997

Appl. No.:

8/796823

Inventors:

Michael G. Hawkins - Rochester NY
Hui Chang - Pittsford NY
Joo T. Chung - Cupertino CA
Jennifer E. Dewan - Rochester NY
John J. Ianni - Medina NY
J. Stephen Kittelberger - Rochester NY
Joseph L. Leonardo - Penfield NY
Timothy L. Lincoln - Rochester NY
Yvonne M. Kenney - Rochester NY

Assignee:

Xerox Corporation - Stamford CT

International Classification:

B29C 4776

US Classification:

73866

Abstract:

An apparatus for the preparation of a mixture of toner resin and initiator, to form a toner resin or toner mixture including cross-linked microgel particles is provided. The apparatus includes a toner extruder having the resin being conveyed therethrough and an adder for adding the initiator to the toner resin in the toner extruder to form the toner resin or mixture. The apparatus also includes a measurer for measuring the cross-linked microgel particles in the toner mixture substantially immediately after mixing in the toner extruder and transmitting a signal indicative of the quantity of cross-linked microgel particles in the toner resin or mixture. The apparatus also includes a controller for controlling the addition rate of initiator in response to the signals from the measurer.

US Patent:

59972726, Dec 7, 1999

Filed:

Mar 27, 1996

Appl. No.:

8/624780

Inventors:

Joseph L. Leonardo - Penfield NY
J. Stephen Kittelberger - Rochester NY
John J. Ianni - Medina NY
Fraser S. Smith - Burlington, CA
Fumii Higuchi - Mississauga, CA

Assignee:

Xerox Corporation - Stamford CT

International Classification:

B29C 4708

US Classification:

425190

Abstract:

A die for the preparation of a toner resin in an extruder having a housing defining a housing aperture therein and a conveyor for conveying the resin through the housing aperture to form a stream of resin is provided. The die includes a member connected to a first end of the housing. The member defines an opening therethrough. The cross sectional area of the opening is progressively reduced in the direction of the stream of resin for at least a substantial portion of the opening.

US Patent:

56504845, Jul 22, 1997

Filed:

Jul 12, 1995

Appl. No.:

8/501528

Inventors:

Michael G. Hawkins - Rochester NY
Hui Chang - Pittsford NY
Joo T. Chung - Cupertino CA
Jennifer E. Dewan - Rochester NY
John J. Ianni - Medina NY
J. Stephen Kittelberger - Rochester NY
Joseph L. Leonardo - Penfield NY
Timothy L. Lincoln - Rochester NY
Yvonne M. Kenney - Rochester NY

Assignee:

Xerox Corporation - Stamford CT

International Classification:

L08G 6352

US Classification:

528481

Abstract:

An apparatus for the preparation of a mixture of toner resin and initiator, to form a toner resin or toner mixture including cross-linked microgel particles is provided. The apparatus includes a toner extruder having the resin being conveyed therethrough and an adder for adding the initiator to the toner resin in the toner extruder to form the toner resin or mixture. The apparatus also includes a measurer for measuring the cross-linked microgel particles in the toner mixture substantially immediately after mixing in the toner extruder and transmitting a signal indicative of the quantity of cross-linked microgel particles in the toner resin or mixture. The apparatus also includes a controller for controlling the addition rate of initiator in response to the signals from the measurer.