Reclosable package having film that curls or bends away from slider
US6939040B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 7, 2002 |
| Grant date | Sep 6, 2005 |
| Priority date | — |
| Expiry date | Apr 24, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B70/8131
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A reclosable package comprises a receptacle and a header that communicate via a mouth, and a slider-zipper assembly disposed in the mouth, the slider being exposed when a first portion of the header is removed. The header further comprises second and third portions having respective states of tension that will cause the second and third portions of the header to curl or bend away from the slider when the first portion of the header is removed, for example, by tearing or cutting. The second and third portions of the header curl or bend in opposite directions to allow easy access to the slider by the consumer. In a method of manufacture, the second and third portions of the header are heat treated to produce differential shrink tension states. Alternatively, the header material can be a thermoplastic laminate film in which the layers have different shrink tension states.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.