Xerox Corporation

Thomas R Pickering

Roger N Ciccarelli

Denise R Bayley

Jacques C Bertrand

Edul N Dalal

William H Hollenbaugh, Jr

Sue E Blaszak

Amy L Stamp

Kristen M Natale-Hoffman

Scott M Silence

Samuel Kaplan

Alexander N Klymachyov

James R Combes

Padam K Angra

Dwight J Tshudy

John S Walters

James R Larson

George Amos Gibson

John W Spiewak

Richard P Veregin

Timothy L Lincoln

Frank J Bonsignore

Maria N McDougall

Louis V Isganitis

Scott D Chamberlain

Eric M Strohm

Robin L Sheppard

Andrew Joseph Furman

A toner having at least one binder, at least one colorant and external additives. The external additives include at least one of silica and titania, and at least two metal stearates. A developer may be produced including the toner having at least two metal stearates and a carrier. An electrophotographic machine includes the toner with two metal stearates.

Particle external surface additive compositions

A toner composition including a binder, a colorant, and a surface additive package including a surface treated silica, a surface treated titania, and magnesium stearate.

Toner compositions with surface additives

A toner composition for use in a xerographic or electrostatographic imaging process. The toner composition includes a toner particle and an optional primary external surface additive and a friable external surface additive. The friable external surface additive may also be a material that is capable of functioning as a primary external surface additive. The friable external surface additive is generally larger than the primary surface additive and capable of having portions of the friable particle broken or abraded off during the imaging process. The particles that are abraded off the friable additive can replace the primary external additive particles that become embedded into toner particles during the development process. The friable additives contribute to reducing toner aging and provide a toner with satisfactory flow and triboelectric properties.

Toner compositions

An apparatus comprised of a charging component, a development component, a transport component, a photoconductive component, and a fusing component, and wherein the development component contains a toner comprising at least one binder in an optional amount of from about 85 to about 99 percent by weight, at least one colorant in an optional amount of from about 0.5 to about 15 percent by weight, and calcium stearate in an optional amount of from about 0.05 to about 2 percent by weight and wherein following triboelectric contact with carrier particles, the toner has a charge Q measured in femtocoulombs per particle diameter D measured in microns (Q/D) of from about &#x2212;0.1 to about &#x2212;1 fC/&#x3bc;m with a variation during development of from about 0 to about 0.25 fC/&#x3bc;m and wherein the distribution is substantially unimodal and possesses a peak width of from about 0.1 fC/&#x3bc;m to about 0.5 fC/&#x3bc;m and the toner possesses a charge to mass M, as measured in grams, ratio (Q/M) of from about &#x2212;25 to about &#x2212;70 &#x3bc;C/gram with variation of Q/M during development of from about 0 to about 15 &#x3bc;C/gram.

Toners and developers

A toner comprised of resin, colorant and calcium stearate.

A toner composition includes a binder, a colorant, and a treated alumina, wherein the treated alumina includes alumina particles treated with a treatment agent. The treatment agent can be, for example, an alkylalkoxysilane such as decyltrimethoxysilane.

A toner comprised of resin, colorant and a coated silica, and wherein said silica has a primary particle size of about 25 nanometers to about 55 nanometers, and an aggregate size of about 225 nanometers to about 400 nanometers, and said coating is comprised of a mixture of an alkylsilane and an aminoalkylsilane.

Detection of the presence and amount of an external surface additive such as silica upon the surface of a toner is accomplished by treating the external surface additive with a fluorescent material and exposing the toner to ultraviolet light. This permits accurate quality control over the amount of the external surface additive required for the toner. The toner thus includes a binder resin and a colorant, and at least one external surface additive upon the surface of the toner, wherein the at least one external surface additive contains a fluorescent material. The fluorescent material may be a fluorescein dye.

Fluorescent treated external surface additives for toner

A toner comprised of binder, colorant, and a silica containing a coating of an alkylsilane.

A liquid developer comprised of a liquid, resin particles, an optional nonpolar liquid soluble charge director, and a charge adjuvant comprised of an aluminum salt of an acid, wherein the acid is a hydroxy carboxylic acid, an amino carboxylic acid, an aromatic carboxylic acid, an aliphatic carboxylic acid, or a sulfonic acid and imaging processes using the same one disclosed.

Developer compositions and imaging processes

Toners comprised of a cyan toner, a magenta toner, a yellow toner, an orange toner, a green toner, and a black toner, each of said toners being comprised of resin and pigment; and wherein the pigment for the orange toner is Orange 5, C.I. number 12075, Orange 13, C.I. number 21110, Orange 16, C.I. number 21160, or Orange 34, C.I. number 21115, and the pigment for the green toner is Green 7, C.I. number 74260, or Green 36, C.I. number 74265, and wherein said pigment for each toner, excluding black, is prepared by flushing each of said pigments, wherein a cyan, magenta, yellow, orange, and green pigment water wet cake is mixed with toner resin, and the water is removed, or substantially removed to generate pigmented resins.

Colored toner and developer compositions and process for enlarged color

A combination of toners including a cyan toner, a magenta toner, a yellow toner, an orange toner, a green toner and a black toner, each of the toners containing resin and pigment. The pigment for the orange toner can be Orange 5, C.I. number 12075, and the pigment for the green toner can be Green 7, C.I. number 74260. The pigment for each of the toners excluding black can be prepared by flushing processes.

Toners comprised of a cyan toner, a magenta toner, a yellow toner, a green toner, and a black toner, each of said toners being comprised of resin and pigment; and wherein the pigment for the green toner is Green 7, CI Number 74260, or Green 36, CI Number 74265, and wherein said pigment, excluding black, is dispersed in said resin by flushing, wherein a cyan, magenta, green, and yellow pigment water wet cake is mixed with toner resin, and the water is sbustantially removed to generate pigmented resin.

Growing community of inventors

Webster, NY, United States of America

Thomas R Pickering