Method for attaching reclosable zipper strip transversely to a sheet of thermoplastic film material
US6751932B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 2003 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Feb 19, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B70/8133
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method for attaching a reclosable zipper strip (40) onto a sheet of thermoplastic film material (32) in the production of packages includes an apparatus (10) which has two guide plates (12, 14) that define a guide space (16). The apparatus (10) includes a pair of hole punches (26), one on either side of the guide space (16), and;a knife (24) which severs lengths of the zipper strip (40) in the guide space. The hole punches (26) and the cutting knife (24) are separated from one another by a distance equal to the length of the zipper strip (40) being attached to the sheet (32). The hole punches remove the flanges (54, 56, 58) from a preselected amount of the zipper strip (40) upstream of the knife (24).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.