Xerox Corporation

Thomas J Budny

John A Creatura

Samir Kumar

Bernard A Kelly

Brian E Moore

Brian S Giannetto

Scott M Silence

Edward J Gutman

William H Hollenbaugh, Jr

Deepak R Maniar

Michael J Duggan

Zhaoyi M Masucci

Lloyd D Spencer

A carrier comprised of a core, and thereover a polymer coating containing a first polymer and a silicone resin, and which resin possesses an average diameter of from about 300 to about 3,000 nanometers.

Coated carrier

Carrier comprised of a core, a polymer coating, and wherein said coating contains a conductive polypyrrole contained in a carbon black matrix; or a polyaniline contained in a carbon black matrix.

Coated conductive carriers

A method of replenishing developer, wherein the replenisher contains carrier particles coated with zinc stearate.

Method of replenishing developer with zinc stearate

An apparatus for enabling the agitation of carrier particles utilizing a carrier transporting member with a series of magnets attached, which magnets attract and retain the carrier particles present in a container means. The transporting member is caused to rotate by a roller.

Apparatus for the preparation of carrier particles

An apparatus for obtaining carrier particles which comprises in operative relationship a container means, a rotating means, a moving transporting means in contact with the container means and the rotating means, and a magnet means attached to the transporting means.

A process for the preparation of carrier particles which comprises mixing a carrier core with a first polymer; adding to the aforementioned mixture a second polymer not in close proximity in the triboelectric series to the first polymer; and heating the components for a period of time until the first and second polymer fuse to the core.

Processes for coated carrier particles

An improved process for rapidly charging toner particles which comprises (I) adding uncharged replenishment toner particles to a charged developer composition comprised of carrier particles and toner particles, the carrier particles consisting of a core containing a continuous polymer coating thereover having incorporated therein a fluoropolymer, contained on from about 1 percent to about 20 percent of the surface area of the coating, (II) contacting the charged developing composition containing said carrier particles with uncharged toner particles wherein charges are transferred to the uncharged toner particles within a mixing period of from about 5 seconds to about 5 minutes, thereby resulting in substantially the same level of charge intensity for said uncharged toner particles as the charge intensity for the charged toner particles in the charged developer composition, which charge intensity for example is from about 5 microcoulombs per gram to about 50 microcoulombs per gram of toner particles.

Process for charging toner compositions

A toner dispenser including a substantially enclosed dispensing hopper arranged to support a quantity of finely divided particulate material. The hopper is provided with an opening therein through which the material is dispensed by gravity to a developer sump. A cylindrical dispensing roll is rotatably supported in the hopper in or adjacent the opening with the roll surface in biasing contact with the interior wall surface of the container to form a movable seal for retaining particulate material within the hopper. The roll is formed of a resilient foamed elastomeric material having a textured outer surface with a plurality of open-cell cavities adapted to receive and support toner particles. The dispensing roll is rotated sequentially through the material in the hopper to load the open-celled cavities and then past at least one of the biasing surfaces wherein the surface of the roll is deformed sufficiently to cause toner thereon to be dispensed from the roll surface into the developer chamber. An antibridging apparatus is provided within the dispensing apparatus to maintain the contents of the container in a particulate state to ensure the uniform dispensing thereof, the antibridging apparatus comprising a web-like net mounted for rotation intermediate the roll and the walls of the hopper at the dispensing opening. The net may be driven by the frictional contact with the foam dispensing roll itself.

Growing community of inventors

Penfield, NY, United States of America

Thomas J Budny