Photographic film assemblages and methods of making
US5981137A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Oct 28, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/42
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An improved self-developing film unit comprising: a processing fluid supply including a rupturable reservoir of processing fluid; an image recording assembly of the self-developing type including first and second overlying layers one of which is exposable to form a latent photographic image, and a spacer connected to and between the first and second layers for providing a processing space therebetween for allowing processing fluid to pass therethrough; a fluid trap at a trailing end portion of the film unit for collecting excess processing fluid traveling through the processing space; a first fluid-tight coupling device including a fluid passage for fluidically coupling the reservoir to a leading end of the processing space for allowing processing fluid from a ruptured reservoir to be introduced into the processing space and initiate processing of the latent image; and, second fluid-tight coupling device including a fluid passage for fluidically coupling a trailing end of the processing space with the trap for allowing processing fluid to enter into the trap; the image recording assembly comprises a photosensitive layer, an image receiving layer in overlying and coextensive relatio…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.