Drum cleaning system for electrophotographic apparatus
US4165172A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1976 |
| Grant date | Aug 21, 1979 |
| Priority date | — |
| Expiry date | Dec 15, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/0088
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A spongy roller is rotated so that the surface thereof is pressed against the surface of a photoconductive drum and moves in the opposite direction therefrom. A resilient blade is also pressed against the photoconductive drum downstream of the roller so as to define a trough therebetween into which is supplied a cleaning liquid. The roller and blade remove all residual toner substance from the drum which remains after development and transfer operations. The cleaning liquid is supplied only while the drum is being operatively rotated in a quantity sufficient to wash away substantially all removed toner substance from between the blade and the drum. The roller is large enough to absorb enough cleaning liquid to remain moist and prevent solidification of removed toner substance between the roller and the drum between copying operations and when the apparatus is shut down.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.