Process control for electrostatographic printers
US4914455A · kind A · utility
11Cited by
13References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1989 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Jul 31, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4076
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electrostatographic printer with scanning laser beam for exposing a photoreceptor in accordance with image signals having black, white, and gray level image pixels, with a pulse-width modulator to modulate the beam when exposing gray level image pixels in response to current developing density as measured from the ac component of a combined ac/dc developer bias.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.