Apparatus and method for manufacture of a top opening reclosable bag having a tape formed reclosable seal
US8353147B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jul 22, 2009 |
| Grant date | Jan 15, 2013 |
| Priority date | — |
| Expiry date | Dec 24, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B70/8133
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A vertical form, fill and seal machine in conjunction with a product supply apparatus provides a continuous, heat sealable plastic film and zipper tape and provides separate, product filled, reclosable, top opening sealed bags. The apparatus includes a means for supplying the continuous plastic film, a means for supplying zipper tape, a means for sealing the zipper tape sections to the film, a vertical fill tube assembly, a feeding means including a film drive roll upstream, film pull belts adjacent the vertical fill tube, a vertical sealing means for sealing the edges of the continuous film to the edges of the continuous zippered cap strip, a horizontal sealing, perforating, and severing means for severing the plastic tube between the first and second horizontal seals, and a tensioning means for horizontally elongating the flexible plastic tube transverse to its length prior to formation of the horizontal seals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.