Pressure device for use in image forming apparatuses
US4962402A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 1989 |
| Grant date | Oct 9, 1990 |
| Priority date | — |
| Expiry date | Sep 25, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2227/325
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A pressure device for use in image forming apparatuses comprises a pair of pressure rollers by which a media sheet with microcapsules encapsulating a colorless dye and a light-curable agent which hardens by exposure to light is pressed together with an image receiving sheet with a developing agent having a chromogenic effect on the colorless dye after the media sheet is exposed to an image-forming light, a pair of guides by which the pair of rollers are rotatably supported, the pair of guides being rotatable at one end relative to each other about a fulcrum, a roller-pressing means that is installed through the guides, said roller-pressing means pressing the pair of rollers to be pressed against each other, and a pressure changing means that is installed on both the guides, the pressure-changing means changing pressure to be applied to the rollers by the roller-pressing means according to the length of the image receiving sheet that is measured in the direction perpendicular to the transporting direction of the image receiving sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.