Package with peelable portion for light sensitive materials
US4955479A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1989 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Aug 24, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D81/30
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A package comprising first, second and third flexible panels of light-blocking material secured together for holding light sensitive sheet materials therein, with one of the panels being arranged to be completely peeled away and separated from the other panels to provide access to the materials within the package. The package is arranged for insertion into a rigid container where the sheets can be removed for processing. The package comprises a lower panel, a first upper panel, and a second upper panel. Each of the panels is formed of a web of flexible, light-blocking, material, e.g., a laminate of polyester and polyethylene, one or both of which incorporating a light blocking agent. The lower panel has a leading edge, a trailing edge, and a pair of side edges. The first upper panel has a leading edge, a trailing edge, and a pair of side edges. The second upper panel has a leading edge, a trailing edge, and a pair of side edges. The first upper panel is secured to the lower panel by permanent heat seals extending adjacent their respective leading and side edges. The second upper panel is releasably secured to the lower panel by readily peelable seals extending adjacent their respec…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.