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US 5,633,108 AGranted
Monocomponent resistive toner for field charging
AssigneeMoore Business Forms, Inc.
InventorsOrrin D. Christy, John E. Pickett, Leo Swanson, Kevin J. Hook
Life of this patent
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AssigneeMoore Business Forms, Inc.
InventorsOrrin D. Christy, John E. Pickett, Leo Swanson, Kevin J. Hook
Estimating the term…
A toner composition for developing an electrostatic latent image comprising a base toner, which is a blend of a polymeric resin and a colorant, and one or more of a lubricating agent, a flowability agent, a charge-stabilizing agent, and a conductive agent, which has certain electrical characteristics. The base toner has a mean particle diameter (D.sub.50) of 7 to 18 microns, and a bulk resistivity of greater than 10.sup.12 ohm-cm. The toner composition is prepared by blending a polymeric resin with a colorant and then blending a dry powder lubricating agent, and optionally other additives, with the base toner. The toner composition is charged by being disposed in an electrostatic fluidized bed from which the toner particles are levitated by air and then subjected to field charging created by a high voltage corona generating device contained within the bed.
A toner composition for developing an electrostatic latent image comprising a base toner including a blend of a polymeric resin and a colorant, wherein the base toner composition has a particle size distribution with a mean particle diameter (D.sub.50) ranging from about 7 to about 18 microns and a bulk resistivity of greater than about 10.sup.12 ohm-cm.
A method for preparing a toner composition for use in developing an electrostatic latent image comprising:
A method for charging a toner composition comprising the steps of:
Dependencies are inferred from the claim text.