Monocomponent resistive toner for field charging
US5633108A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1995 |
| Grant date | May 27, 1997 |
| Priority date | — |
| Expiry date | Sep 29, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/097
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.