Pressure developing device provided in an image recording apparatus
US5057860A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1990 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Oct 3, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2227/325
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A pressure developing device in an image recording apparatus for recording an image on the recording medium, includes a pair of pressure developing rollers to be separated from and contacted with each other, and a pressurizing unit disposed on either one of the pressure developing rollers for pressurizing one of the pressure developing rollers toward or away from the other of the pressure developing roller. A pressure control unit controls the pressurizing unit in such a fashion that one of the pressure developing rollers is placed in contact with and pressurized against the other of the pressure developing rollers under a plurality of pressure conditions by the pressurizing unit so that the pressure strength between a pair of pressure developing rollers is gradually decreased from the center to the ends along the axial direction of the developing rollers. The pressure control unit also controls the pressurizing unit in such a fashion that the one of pressure developing rollers can be separated from the other of the pressure developing rollers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.