Xerox Corporation

Lewis S Smith

K Derek Henderson

Gerardo Leute

Samir Kumar

Peter Gordon Odell

Hadi K Mahabadi

Scott M Silence

Jacques C Bertrand

Steven C Hart

William H Hollenbaugh, Jr

James R Combes

Henry T Mastalski

Amy L Stamp

Zhilei Wang

Thomas W Nash

Joseph S Zelazny

Susan J Lafica

Edward Vanzo

Kenneth Derek Henderson

Dawn M O'Loughlin

Thomas W O'Connor

Philip O Sliva

Juan M Tirado

Steven D Booth

Daniel E Juda

A process including: blending carrier particles in a fluidized bed jet mill and continuously separating fine particles formed therein from the resulting blended carrier particles.

Carrier composition and processes thereof

A process for the preparation of toner additive wax particles which comprises the micronization of said particles from a supercritical solution.

Supercritical fluid processes

An apparatus for the classification of solid particulates entrained in a fluid, comprising: a housing provided with a feed inlet, a fine fraction outlet, and a coarse fraction outlet; and a classifier wheel having an upper and lower surface, and a plurality of blade vanes connecting the upper surface to the lower surface at the peripheral edges of the upper and lower surfaces, and wherein the wheel has a constant cut point geometry.

Particle classification apparatus and processes thereof

A process for preparing toner compositions comprising: coinjecting into a continuously operating fluid energy mill, feed toner particles, and a liquid component; and separating the resulting comminuted toner particles.

Toner particle comminution and surface treatment processes

A fluidized bed jet mill for grinding particulate material including a jetting nozzle comprising: a first hollow cylindrical body with a first diameter, wherein one end of the body is directed towards the center of the jet mill and the other end traverses the wall of the jet mill; and a hollow cylindrical curvilinear body with a diameter which is less than said first diameter, wherein the first end of the curvilinear body is collinear with the long axis of said first hollow cylindrical body, wherein the first end of the curvilinear body is at a point approximately equal to the end of the first hollow cylindrical body, wherein the second end of the curvilinear body passes through an opening in the side wall of said first hollow cylindrical body, and wherein said side wall opening is leak free and resides within the grinding chamber of the fluid bed mill; and wherein the nozzle communicates the gas stream from a high pressure source to the grinding chamber.

Laval nozzle with central feed tube and particle comminution processes

A fluidized bed jet mill for grinding particulate material including a jetting nozzle comprising: a hollow cylindrical body; an integral face plate member attached to the end of the cylindrical body directed towards the center of the jet mill; and an articulated annular slotted aperture in the face plate for communicating a gas stream from the nozzle to the grinding chamber to form a particulate gas stream in the jet mill.

Fluidized bed jet mill nozzle and processes therewith

A fluidized bed jet mill for grinding particulate material comprising: a) a grinding chamber having a peripheral wall, a base, and a central axis; b) an impact target with a hollow cavity defined thereby, and with at least three apertures transversing the walls thereof, said target being mounted within said grinding chamber and centered on said central axis of said grinding chamber; and c) a plurality of sources of high velocity gas, said gas sources being mounted in said grinding chamber in said peripheral wall, arrayed symmetrically about said central axis, and oriented to direct high velocity gas along an axis substantially perpendicularly intersecting said central axis within said impact target, each of said sources of high velocity gas comprising a nozzle having an internal diameter; wherein said impact target has a cross section area in a plane parallel to said central axis, and said cross section area is greater than said cross section area of said internal diameter of said nozzle; and wherein the distance between said impact target and any of said nozzles is greater than said internal diameter of said nozzle.

Throughput efficiency enhancement of fluidized bed jet mill

An apparatus for recirculating developer material in a developer unit. The apparatus includes a first transporter for transporting the developer material in a first direction, a second transporter for transporting the developer material in a second direction opposite to the first direction, and a mover for moving the developer material from the first transporter to the second transporter.

Positive push development auger

A coarse particle separator for separating and collecting coarse toner particles having a size greater than substantially 500 microns comprises a tank having an inlet and an outlet, the separation being performed within the tank. The inlet to the tank is located at a lower portion of the tank and is connected to an eductor station by an eductor line. Particles are introduced to the inlet by the eductor line at a velocity of approximately 4500 ft/min. The separation of coarse and light toner particles can be performed by reducing the flow velocity so the coarse particles settle out by their own weight. A flow baffle made of a 75 micron screen hinders the passage of coarse particles. The outlet outputs light toner particles to at least one toner storage bin. Alternatively, the tank can have a conical-shaped upper portion which induces a cyclone effect in the flow of toner particles, the cyclone effect resulting in the collection of coarse particles in the lower portion of the tank. The apex of the conical-shaped upper portion terminates in the outlet. The inlet is located at a side of the tank such that a clearance is provided below the inlet for collection of the coarse toner particles.

Coarse particle separator for toner particles

A fluidized bed jet mill has a grinding chamber with a peripheral wall, a base, and a central axis. An impact target is mounted within the grinding chamber and centered on the chamber's central axis. Multiple sources of high velocity gas are mounted in the peripheral wall of the grinding chamber, are arrayed symmetrically about the central axis, and are oriented to direct high velocity gas along an axis intersecting the center of the impact target. In another embodiment, a fluidized bed jet mill has a grinding chamber with a peripheral wall, a base, and a central axis. Multiple sources of high velocity gas are mounted in the peripheral wall of the grinding chamber, are arrayed symmetrically about the central axis, and are oriented to direct high velocity gas along an axis intersecting the central axis of the grinding chamber. Each of the gas sources has a nozzle holder, a nozzle mounted in one end of the holder oriented toward the grinding region, and an annular accelerator tube mounted concentrically about said nozzle holder. The end of the accelerator tube closer to the nozzle is larger in diameter than the nozzle holder and the opposite end of the accelerator tube. The accelerator tube and the nozzle holder define between them an annular opening through which particulate material in the grinding chamber can enter and be entrained with the flow of gas from the nozzle and accelerated within the accelerator tube to be discharged toward the central axis. These embodiments can be combined for further efficiency enhancement.

A method of forming particles of between about 5 and about 50 microns utilizing a two stage process wherein monomer possibly containing pigments, dyes and/or fillers such as silicon and magnetite, as well as chemical reagents such as crosslinking agents and chain transfer agents, is sized to a narrow range by high shear mixing then polymerized during slow speed agitation to form polymeric particles.

Growing community of inventors

Fairport, NY, United States of America

Lewis S Smith