Zippered closure for packages
US5063639A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | Feb 23, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T24/45168
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Zippered material for packages comprising a zipper strip having longitudinally extending complementary reclosable interlockable zipper profiles with a web separating the profiles. In one aspect, the strip is notched out to the web from opposite sides at package section intervals and with limited respective areas of the web providing links connecting the sections of the strip at the notches, the links being sealed and flattened onto package making sheet material. In another aspect, the web and the material have matching lines of weakening, the web is hermetically bonded to the material and at least the line of weakening of the web is hermetically sealed to prevent leakage through the lines of weakening, but enabling tear-open separation along the lines of weakening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.