Device for image toner distribution on a developing device
US5016560A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1989 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | Apr 25, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0889
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device for developing an electrostatic latent image formed on an image carrier includes a roller which carries toner particles to the developing position and a porous foam member of a material such as urethane resin which contacts the roller. The porous foam member comes in contact with either a developing roller or a toner supply roller which supplies toner particles to the developing roller. Toner particles supported in the holes of the porous foam member are charged as the particles rub against the developing roller or toner supply roller, causing the particles to be readily transferred to the roller. The porous foam member causes the amount of toner particles supported on the surface of the developing roller or the toner-supply roller to be sufficient to prevent a reduction in the density of the toner image even directly after a larger amount of toner particles are consumed for developing a solid toner region for example.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.