Methods of making resealable packages and reclosable seals
US6519918B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Dec 18, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S493/927
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Methods for making packages having improved openable and reclosable interlocking seals from a continuous web of composite packaging film, the seal having male and female portions of arrowhead shape in cross section, snap detents, and being formed transversely to the direction of film flow during package formation at line speed. The packaging film is provided at package length intervals with thermoformable strips secured thereto transversely to the running length of the film, and is fed to a modified standard vertical form, fill and seal packaging machine where the film is formed into a bag with the thermoformable strip inside in ends abutting folded facing relationship at the upper end of the bag, product deposited into the bag, the bag sealed, the reclosable interlocking seal formed, and the bag severed from the next bag being formed. The package reclosable seal provides positive auditory and tactile indications of the closing of the reclosable seal so that the consumer is assured that the package has been resealed even in the absence of visual package inspection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.