Eastman-kodak Company

Jason Morgan

Dinesh Tyagi

Robert A Guistina

Mridula Nair

Matthias Hermann Regelsberger

Tamara K Jones

Xiqiang K Yang

John F Crichton

Timothy Gilbert Armstrong

Raymond Rossborough

Xin Jin

Charles T Havens

A method and system for printing documents with one or more embedded security features is provided. Security features are embedded in the document by co-printing magnetic and non-magnetic toner on a receiver before fixation by a fixing station. The combination of magnetic and non-magnetic toners in the image results in image elements that easily show alteration or are undetectable by visual means.

Secure document printing method and system

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 toner particle that includes a continuous phase of binder polymer and a second phase of hydrocolloid. The particle has a porosity of at least 10 percent.

Toner porous particles containing hydrocolloids

The present invention provides a porous toner. The porous toner has a porosity of greater that 20 percent. The toner can include vinyl polymers, copolymers of styrene monomers and polyesters. In addition a method of manufacture of the toner particles is provided.

Chemically prepared porous toner

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.

Growing community of inventors

Fairport, NY, United States of America

Jason Morgan