Film assembly
US5888693A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1997 |
| Grant date | Mar 30, 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: processing fluid supply means including a rupturable reservoir of processing fluid at a leading end portion of the unit; image recording means of the self-developing type including first and second overlying layers one of which is exposable to form a latent photographic image, and spacer means connected to and between said first and second layers for providing a processing space therebetween for allowing processing fluid to pass therethrough; fluid trap means at a trailing end portion of the film unit for collecting excess processing fluid traveling through said processing space; first fluid-tight coupling means including a fluid passage for fluidically coupling said reservoir to a leading end of said processing space for allowing processing fluid from a ruptured reservoir to be introduced into said processing space and initiate processing of the latent image; and, second fluid-tight coupling means including a fluid passage for fluidically coupling a trailing end of said processing space with said trap means for allowing processing fluid to enter into said trap means; said first coupling means having one end portion sealably secured…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.