Flexible light-shielding enclosure for photosensitive web end
US5145066A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1991 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | Jul 31, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/588
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In use with a photosensitive web roll located inside a light-tight container having an exit slot through which the web is withdrawable, a flexible enclosure is provided for light-shielding a leading end portion of the web extending from the roll through the slot and outside the container. The enclosure comprises a flexible, substantially rectangular, opaque sleeve adapted to enclose the web end portion. The sleeve includes opposing top and bottom walls disposed in adjacent, registered, facing relationship and extending between front and rear ends and opposite lateral sides thereof. The walls are light-tightly joined together along their front ends and lateral sides, but are left unjoined and separable along their rear ends to provide an opening therebetween through which the web end portion can be inserted into the sleeve toward the joined front ends. The sleeve, with the web end portion so inserted, extends outwardly from within the container, through the exit slot, and then outside the container, where it is folded back and secured against the container exterior.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.