Xerox Corporation

Scott M Smith

Chieh-Min Cheng

Judith M Vandewinckel

Kevin F Marcell

Brian Joseph Marion

Gene T Tomasino

Joseph F Gorzka, Jr

Brian J Marion

A method includes grinding a wax into wax particles having a size in a range from about 600 microns to about 800 microns forming a mixture of the wax particles with water and a surfactant; and homogenizing the mixture to form a wax dispersion, the homogenizing step is maintained below about 35&#xb0; C. A wax dispersion includes a wax a surfactant; and water, particles of the wax dispersion are a uniform, irregular, non-platelet morphology. A wax dispersion made by a process includes grinding a wax into wax particles having a size in a range from about 600 microns to about 800 microns, forming a mixture of the wax particles with water and a surfactant, and homogenizing the mixture to form a wax dispersion, the homogenizing step is maintained below about 35&#xb0; C. and the wax has a uniform, irregular, non-platelet morphology imparted by combination of the grinding and homogenizing steps.

Cold wax dispersion process

A mill for grinding marking particles utilizing a source of a pressurized fluid is provided. The mill includes a grinding chamber having a peripheral wall, a base and a central axis. The mill also includes a nozzle associated with the peripheral wall of the grinding chamber. The nozzle defines an inlet of the nozzle. The inlet is connectable to the source of pressurized fluid. The pressurized fluid propels the marking particles about the periphery of the chamber. The mill further includes a plug cooperable with the nozzle. The plug is in engagement the nozzle when the pressure within the grinding chamber is substantially greater than the pressure at the inlet of the nozzle. The plug is spaced from the nozzle when the pressure within the grinding chamber is substantially less than the pressure at the inlet of the nozzle, so that when the source of pressurized fluid is connected to the inlet, the plug is spaced from the nozzle permitting the entry of the pressurized fluid into the chamber and so that when the source of pressurized fluid is disconnected from the inlet, the plug is engaged with the nozzle preventing marking particles from entering the nozzle and clogging the nozzle.

Air actuated nozzle plugs

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Webster, NY, United States of America

Scott M Smith