Lexmark International, Inc.

Billie Jo Enciu

Donald Wayne Stafford

Johnny Dale Massie, Ii

Kelly Ann Killeen

Martin Victor DiGirolamo

Robert Francis Soto

Kurt Daniel Lambert

Elaine Yeap Money

A toner adder roll according to one example embodiment includes an electrically conductive shaft defining an axis of rotation of the toner adder roll. A foam member is cylindrically disposed about the shaft and forms an outer circumferential surface of the toner adder roll. The foam member is composed of a polymeric open-cell foam material. An abrasive agent is dispersed on the outer circumferential surface of the toner adder roll.

Toner adder roll having an abrasive agent additive

The present invention provides an aqueous ink containing &#x2267;3% silver particles having much improved adhesion. It has been found that the adhesion can be improved by adding an aqueous cationic dispersion of a styrene/acrylate copolymer, PEI (polyethyleneimine), or arabinogalactan as an additive to the ink. The advantage of using one of these materials to improve the adhesion of the silver ink is the stability of the ink is maintained and the resistivity goal is met when printed onto the specified media. In other words, this invention provides a silver ink with great adhesion properties while still able to meet the &#x3c;0.1 &#x3a9;/square resistivity requirement and remain stable for up to 4 weeks at 60&#xb0; C. at accelerated oven aging conditions.

Silver ink compositions containing a cationic styrene/acrylate copolymer additive for inkjet printing

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Richmond, KY, United States of America

Billie Jo Enciu