Tamper-evident opening device, screw cap for use in such an opening device and method of forming such an opening device
US8256632B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2007 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Oct 15, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7158
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An opening device for a packaging container comprises a neck portion and a screw cap. The opening device comprises a wall of the first part of the screw cap being with a weakening extending in a circumferential direction of the first part and a recess extending in a longitudinal center axis direction of the first part. The recess is arranged to receive a projection of the neck portion, which projection is directly injection-molded in the recess. A tamper flap of the first part, which tamper flap is defined by the weakening and the recess, is automatically deformable in connection with a first time opening of the packaging container by cap rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.