Image forming apparatus
US5268709A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1992 |
| Grant date | Dec 7, 1993 |
| Priority date | — |
| Expiry date | Jun 19, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G13/09
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image forming apparatus, includes a photosensitive member; a light source for producing a beam bearing image information, wherein the beam is projected on the photosensitive member through an imaging optical system to form a scanning spot thereon to form a latent image thereon; developing means for developing with toner the latent image formed on the photosensitive member; wherein not less than 90% by volume of the toner particles satisfy: EQU (1/2)M<r<(3/2)M, and not less than 99% by volume of the toner particles satisfy: EQU 0<r<2M, where M is a volume average particle size of the toner, and r is a particle size of the toner particle; and PA1 wherein a recording density of the latent image is higher than 400 dpi, and a size of the spot measured in a movement direction of the scanning spot is not more than a picture element size, and wherein a tone gradation of the image is produced by area gradation on the basis of binary level information per picture element included in the image information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.