Tamper-evident closures
US4828127A · kind A · utility
27Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1988 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Feb 26, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D41/3414
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In a tamper-evident screw-threaded closure of the kind in which the skirt of a cap is joined at its lower edge to a band by integral elongated breakable webs the webs are associated with co-operating teeth and notches that drive the band during the screwing-on step, the web extending from the root of the tooth to the adjacent wall of the notch in an inclined direction such as to flex or pivot and allow relative movement between the cap and band during this step without breaking, and the band has lugs which oppose circumferential, rather than axial, movement in the unscrewing direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.