Transverse directional zipper with a double seal flange profile configuration
US6428642B1 · kind B1 · utility
13Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2000 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Mar 13, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1038
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A vertical form fill and seal apparatus is used to manufacture reclosable containers. A plastic zipper segment is provided with a double seal flange configuration wherein two zippers are provided for adjacent reclosable containers, one reclosable container being upside down and the other being rightside up. The zipper segment is initially provided on the web with the first flange sealed to the web. A tube is formed so that lateral edges are folded over and sealed to the second flange. A cut is thereafter formed by the sealing bars to separate the two reclosable containers from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.