Barrier package for instant film
US5660322A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1995 |
| Grant date | Aug 26, 1997 |
| Priority date | — |
| Expiry date | Aug 30, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S206/806
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A carton for a package of photographic film, such as instant film. The carton is formed of a unitary paperboard blank coated on both sides by a thermoplastic barrier film. The thermoplastic functions as an adhesive when acted upon by heat and pressure, thus sealing portions of the blank together. Each of four corners of the carton includes a gusset folded in such a manner as not to present a raw paperboard edge to the interior. The construction yields an air tight, liquid tight package with an oxygen barrier, and obviates the requirement of many similar packages that the photographic film be separately wrapped in a protective foil or film prior to being placed in a carton. Three embodiments of the carton are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.