Method for applying a narrow web zipper transverse to the film direction
US6656297B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2001 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Apr 24, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1744
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The apparatus and method uses grooved rollers and a grooved guide plate to position zipper segments on a web. The web is subsequently formed into a cylinder in a form fill and seal apparatus and seal bar assemblies form the bottom transverse seal, the web is indexed and the cylinder is filled, and the seal bar assemblies form the top transverse seal simultaneously with the bottom transverse seal of a subsequent bag. A zipper seal bar completes the sealing of the zipper segment to a second side of the web and a knife extends from a slot in a seal bar assembly to separate the completed bag from the web. This apparatus and method is particularly adapted to narrow zipper segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.