Lexmark International, Inc.

James Joseph Semler

Ronald Lloyd Roe

Kelly Ann Killeen

Bhaskar Gopalanarayanan

Johnny Dale Massie, Ii

Matthew Joe Russell

Gerald Lee Fish

Johnathan Lee Barnes

Leea Danielle Haarz

Jeremy Lavern Daum

Sudha Chopra

Todd Joseph Svoboda

Jeannette Quinn Bracken

A method for forming a roll core for use in an electrophotographic image forming device according to one example embodiment includes shaping the roll core from a mixture of an uncured elastomer and hollow microparticles. The elastomer of the shaped roll core is cured without permanently expanding hollow microparticles positioned near the outer surface of the shaped roll core. After curing, the hollow microparticles positioned near the outer surface of the shaped roll core are permanently expanded to form the roll core having compressible and resiliently recoverable hollow microparticles extending beyond an outer circumference of the roll core and providing a surface texture to the roll core.

Elastomeric roll for an electrophotographic image forming device having compressive hollow microparticles defining a surface texture of the roll

A method for making a developer roll by molding a metal shaft with a conductive or semi-conductive soft rubber forming a rubber core and a coating deposited on the soft rubber core wherein the coating has a conductive agent. The outer surface of the soft rubber core is modified to form an &#x2014;OH rich surface layer before the coating is deposited onto the outer surface of the rubber core to chemically bond therein.

Developer rolls having a tuned resistivity method for making

The present disclosure relates to controlling a performance characteristic of an image forming device component having a surface which may include removal of a portion of the surface to expose a plurality of voids and a surface between the voids. The surface between the voids may have a surface roughness Ra in the range of 0.1 to 5.0 microns and the relationship SA/(SA+SA) is equal to 1-50%, where SAis the surface area of the voids and SAis the remaining surface area of the component. The performance characteristic may include the control of toner mass conveyed and/or toner filming and/or the amount of residual toner removed from a photoconductive surface.

Toner mass control by surface roughness and voids

Developer roll having a conductive or semi-conductive soft rubber core and a coating deposited in the soft rubber core wherein the coating has a conductive agent. The outer surface of the soft rubber core is modified before the coating is deposited onto the outer surface of the soft rubber core. Methods for making the same.

Developer rolls having a tuned resistivity

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Lexington, KY, United States of America

James Joseph Semler