Imaging system
US3942979A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 1974 |
| Grant date | Mar 9, 1976 |
| Priority date | — |
| Expiry date | May 30, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrostatographic imaging process comprising the steps of providing an electrostatographic imaging member having a recording surface, forming an electrostatic latent image on said recording surface, and contacting said electrostatic latent image with a developer mixture comprising classified toner materials electrostatically clinging to the surface of classified high surface area carrier materials, said classified toner materials having a particle size number distribution with a fine index ratio of less than about 2.50, a particle size volume distribution with a coarse index ratio less than about 1.50, and a particle size distribution wherein less than about 30.0 percent by number of the toner particles have an average particle size diameter of less than about 5 microns, about 25% of the particles have a diameter between about 8 microns and about 12 microns, and less than about 5% by number of the toner particles have an average particle diameter greater than about 20 microns, said classified high surface area carrier materials having a specific surface area of at least about 150 cm.sup.2 /gram, whereby at least a portion of said finely-divided toner particles are attracted to…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.