Tamper evident closures
US6564958B1 · kind B1 · utility
15Cited by
9References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2001 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Jun 22, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2401/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A snap-on or screw type, tamper evident closure having first and second relatively moveable plastic parts (16, 18) which move from an initial position to a new limiting position when the closure is first opened, the new limiting position being visually distinguishable from the initial position to provide the tamper evidence. The two plastics parts are formed in mutually intimate association but have inter-engaging complimentary formations (22, 28, 40, 42) which become irreversibly disengaged on first opening of the closure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.