Method for daylight loading a photographic light-sensitive material
US5649411A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1994 |
| Grant date | Jul 22, 1997 |
| Priority date | — |
| Expiry date | Dec 16, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B42/045
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A stack of photographic sheets is arranged between two rectangular sheets of lighttight wrapping foil. The foil sheets are of a size larger than the stack so that their side margins project laterally exteriorly of the stack in sandwiched relation to form flaps on all sides of the stack. The flaps are initially lighttightly closed, e.g. sealed together, along their peripheral margins. The wrapped stack is lighttightly enclosed within a package having a base and a cover. The base has upstanding side walls arranged in a rectangle large enough to contain the wrapped stack and may include a solid bottom wall. The cover is light-impervious and has margins overlying the top edges of the base side walls in lighttight clamping contact therewith with inner regions of the projecting sheet flaps gripped therebetween to lighttightly close said flaps inwardly of their edges. The initial closure along the flap margins can now be removed to free edges of the flaps. When, after the package is placed within a lighttight compartment and the cover is lifted from the base, the uppermost of the foil wrapping sheets being no longer connected to the other foil wrapping sheet can be readily removed, render…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.