Ripple lock closure for flexible bags
US4603434A · kind A · utility
20Cited by
17References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 17, 1984 |
| Grant date | Jul 29, 1986 |
| Priority date | — |
| Expiry date | Jul 17, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T24/45152
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A disposable plastic bag is provided having a closure formed by a plurality of ripple strips where each ripple strip comprises a band of rows of adjoining waves, the waves being shaped and positioned such that the highest amplitude of one row is adjacent to the lowest amplitude of the nearest rows. In one embodiment, the highest and lowest points of each row have flanges extending therefrom which interlock with the waves of a facing strip. In a second embodiment, the width of each row is regularly varied and the widest portions of each strip interlock with the widest portions of a similar facing strip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.