Sculpted perforated header for reclosable packages
US7311649B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 2006 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Jun 23, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S493/93
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A machine direction method of manufacture of reclosable packages is disclosed wherein a semi-circular or similarly shaped perforated pattern is punched in the web in registration with the package side seals. Continuous lines of perforation are punched in the web parallel to the top of the package. The web is folded and shaped into a package with a header which includes the semi-circular perforated pattern and the lines of perforation. A similar transverse direction method of manufacture is disclosed. When the top corner of the header is pulled, the header tears along the shaped perforation until it meets the horizontal line of perforation, thereby avoiding tearing through the area of the header that is sealed to the zipper flange, the header then tears along the horizontal perforation and finally follows the shaped perforation on the opposite end of the package.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.