Light-tight package
US5526930A · kind A · utility
5Cited by
10References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 1995 |
| Grant date | Jun 18, 1996 |
| Priority date | — |
| Expiry date | May 15, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/588
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An improved light-tight package for a roll (10) of a length (14) of web material such as photographic paper or film. The package includes an opaque leader (22) wound around the roll. Folded-over portions (48,50) of opaque tearable end disks (32,34) are held in place by tearable adhesive tape strips (44,46). The leader includes a portion adapted to initiate a tear in the tearable tape. Upon unrolling of the package by pulling the leader, the tape tears, and the end disks tear circumferentially, whereby the folded-over portions adhere to the leader when the leader separates from the roll.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.