Zipper guide system for form tooling
US4941307A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Apr 24, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B61/188
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method and mechanism for continuous wrapping of objects in a product package having a reclosable zipper thereon, providing a continuous sheet of thermoplastic film with a reclosable rib and groove fastener profile extending therealong parallel to the formation axis of the film with the profiles interlocked to form a flattened closure, guidingly wrapping the sheet around the object, simultaneously guiding the interlocked fastener to an upright position relative to the object, and flattening the upright interlocked profiles against an outer surface of a wall of the object and thereafter cross-sealing the film at the ends of the object locking the flattened profile to the package end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.