Pressure development apparatus for imaging sheets employing photosensitive microcapsules
US4768050A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1987 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Apr 16, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2227/325
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A two-roll type pressure developer apparatus provides for the pressure development of a latent image formed on sheet material, and includes a first hollow pressure roll mounted on a support shaft which extends axially through the first roll and is in pressure-engagement to define a high pressure nip with a second roll. The support shaft forms a loading shaft through which the hollow or first roll is center-loaded. The rolls are carried in a support frame with the second roller being journalled in the frame, and the first roller being journalled on radius arms through non-self-aligning bearings on the arm ends. The arms in turn are mounted on bosses through self-aligning bearings. Loading springs apply a loading force directly to the loading shaft through the arms and journals so that the self-aligning bearings permit the arms to deflect during the shaft loading while the loading forces are carried by the non-self-aligning bearings. A working zone is established throughout which the nip pressure remains substantially uniform between the rolls, which working zone is somewhat less than the total width of the rolls, and pressure is relieved at the regions axially outwardly of the zones…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.