Xerographic copying apparatus having means to reduce contamination of optical components
US4530589A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 1983 |
| Grant date | Jul 23, 1985 |
| Priority date | — |
| Expiry date | Sep 20, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Xerographic copying apparatus includes an optical system for forming an optical image of an object to be copied on an electrically charged photoconductive surface, the optical image forming a corresponding electrostatic latent image on the surface, and means to develop the latent image with a particulate toner material. At least part of the optical system is housed in a substantially closed compartment, and imaging rays are directed out of the compartment in a generally horizontal direction through a substantially vertical transparent window in the compartment. A blower is provided to blow a curtain of air generally downwardly over the surface of the window outside the compartment, and to blow air into the optics compartment so as to cause a net outflow of air from the optics compartment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.