Zipper for reclosable thermoplastic bag
US5138750A · kind A · utility
98Cited by
10References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 1991 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | May 13, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T24/45168
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A zipper closure for a reclosable thermoplastic bag includes two opposing interlockable rib and groove profiles, wherein at least a part of one or both of the profiles is divided into segments of materials having different elastic moduli. The zipper provides an audibly and/or tactilely perceptible indication of proper interlocking of the profiles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.