Light-tight package
US5492221A · kind A · utility
10Cited by
12References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1994 |
| Grant date | Feb 20, 1996 |
| Priority date | — |
| Expiry date | Nov 2, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S206/813
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An improved light-tight package for a roll (10) of a length (14) light-sensitive material such as photographic film or paper includes an opaque leader (22) provided with adhesive elements (44, 46) which adhere more strongly to the leader that to folded-over portions (58, 60) of opaque end disks (32, 34). Alternatively, adhesive elements (56) having similar properties may be applied to the end disks. Upon unrolling of the package by pulling the leader, the end disks release from the adhesive elements without tearing; and the adhesive elements remain attached to the leader and are removed from the roll with the leader.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.