Eastman-kodak Company

Other

Heidelberger Druckmaschinen Ag

Robert A Guistina

Peter S Alexandrovich

Douglas E Bugner

Dinesh Tyagi

Charles E Romano, Jr

Kristine B Lawrence

Lawrence P DeMejo

James Hunter Anderson

Richard C VanHanehem

Jason Morgan

Steven Evans

Jiann H Chen

Wayne A Bowman

Helmut Weber

Elizabeth G Burns

Karen E Maskasky

John C Wilson

Teh-Ming Kung

Dennis E Smith

William B Vreeland

Robert D Fields

Suresh Sunderrajan

Domenic Santilli

George J Burgmaier

David A Dickinson

Theodore H Morse

James R Bennett

Sandra J Dagan

James C Maher

Susan L Dawson

Douglas C Anderson

Eric L Boyle

Douglas E Eugner

Lawrence P De Mejo

The present invention provides an electrostatographic toner that has a condensation polymer binder having carboxylic acid end groups and an acid number of 4 or greater. The carboxylic end groups are converted to metal salts having the structure;(&#x2014;COO)Mwhere M is selected from groups IB, IIB, IIIB, IVB, VB, or IA, IIA, IIIA, IVA, VA, VIA, VIIA and VIIIA of the periodic table and n is an integer from 1-4. The present invention also provides a developer of carrier particles and the electrostatographic toner.

Negative charge control agents and their preparation

The present invention is directed to an electrostatographic toner having a sulfone charge control agent having the structure X&#x2014;SO&#x2014;Y wherein X is an alkyl or aromatic group and Y is an alkyl or aromatic group. The present invention is also directed to an electorstatographic developer containing the electrostatographic toner having a sulfone charge control agent having the structure X&#x2014;SO&#x2014;Y wherein X is an alkyl or aromatic group and Y is an alkyl or aromatic group and carrier particles.

Sulfone charge control agents for electrostatographic toners

The present invention is an electrostatographic toner that includes an organometallic complex of dimethyl sulfoxide with a metal salt as a charge control agent having the structure;(M)((CH)SO)(A)where n, q, x and z are integers between 1 and 6, and y is an integer between 2 and 12, The present invention also includes a developer having a toner, an organometallic complex of dimethyl sulfoxide with a metal salt as a charge control agent having the structure;(M)((CH)SO)(A)where n, q, x and z are integers between 1 and 6, and y is an integer between 2 and 12, and a carrier particle.

Electrostatographic toner containing organometallic dimethyl sulfoxide complex charge control agent

Toner formulations and developers containing the toner formulations are described. The toner contains at least one toner resin, at least one first charge control agent capable of providing a consistent level of charge, at least one second charge control agent capable of providing a sustained level of charge, at least one surface treatment agent, and at least one release agent and optionally at least one colorant. The toners of the present invention preferably provide a consistent level of charge of from about &minus;10 to about &minus;30 micro C/gm and also provide this level of charge for a sustained period of time, such as from about 2 to about 10 minutes. The toners of the present invention also provides excellent ruboff values for an image printed from the toners of the present invention. Methods of improving ruboff are described as well as methods to develop an image using the toner of the present invention.

Electrophotographic toner with stable triboelectric properties

A photoreceptor cleaning brush for an electrostatographic imaging apparatus contains individual fibers provided with a finishing agent that is a water-miscible aliphatic organic compound containing a plurality of alcoholic hydroxy substituents. The finishing agent is selected from the group of compounds having a molecular weight of up to about 250 and polyethylene glycols having a number-average molecular weight of about 1000 to about 200,000. In an electrostatographic imaging apparatus, the photoconductive imaging element includes the described photoreceptor cleaning brush and a photoconductive surface portion that contains a polycarbonate binder resin. The cleaning brush removes toner from the photoconductive surface portion of the element without damaging it.

Cleaning brush for electrostatographic imaging apparatus and apparatus containing same

The invention relates to an imaging member comprising at least one image layer and a base, said base comprising a cellulose paper that has its surfaces impregnated with water dispersible ester-based condensation polymer wherein the surface of said base has a roughness of less than 2.03 &mgr;m Ra and a hydrophobicity as measured by 40/20 Acid Valley test in excess of 500 seconds.

Water-borne polyester coated imaging member

Process for making an ink jet ink

An ink jet ink composition comprising from about 30 to about 90% by weight of an alcohol carrier, from about 0.5 to about 30% by weight of a pigment, from about 0.125 to about 7.5% by weight of an amine-terminated polyether dispersant, and from about 10 to about 50% by weight of a humectant.

Ink jet ink

Process for preparing an ink jet ink

A process for making toners substantially free from odors originating from components used in the toner formulation is disclosed. The process involves mixing the toner composition with activated carbon. A composition for odor-free toners also disclosed.

Toner compositions containing activated carbons

A method for making an ink jet recording element comprising simultaneously coating on a support the following layers in order:

Method for preparing an ink jet recording element

A thermal dye transfer assemblage comprising:

Assemblage for thermal dye transfer

A thermal dye transfer assemblage comprising: (I) a dye-donor element comprising a support having thereon sequentially repeating dye layer patches of a dye dispersed in a polymeric binder, at least one of the dye patches containing a deprotonated cationic dye which is capable of being reprotonated to a cationic dye having a N--H group which is part of a conjugated system; and (II) a dye-receiving element comprising a support having thereon a polymeric dye image-receiving layer comprising a vinyl polymer having no or only slight acidity and a hydrated transition metal or metalloid salt of a strong acid, the dye-receiving element being in a superposed relationship with the dye-donor element so that the dye layer is in contact with the polymeric dye image-receiving layer.

Thermal dye transfer assemblage

This invention relates to a silver halide color photographic element comprising a support, a silver halide emulsion and poly(thioether)s wherein greater than 50 percent of the poly(thioether)s have acidic functional end groups with an aqueous pKa.ltoreq.10, or end groups which will react to form acidic functional end groups with an aqueous pKa.ltoreq.10 during development, on both termini and wherein the poly(thioether)s have a molecular weight greater than 800.

Thioethers in photographic elements

Growing community of inventors

Rochester, NY, United States of America

Robert A Guistina