Tamper resistant composite lids for food containers
US6772901B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 2002 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | May 17, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2543/00796
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A tamper-resistant, tamper-evident composite lid is disclosed for use with containers having a peripheral lip formation around the opening thereof, such as an ice cream container. The closure member comprises integral outer and inner cylindrical ring portions which present at their upper peripheral margin a downwardly stepped annular ledge formation for adhesively receiving a paperboard or other flexible cover panel. The inner ring portion presents a plurality of resiliently deformable teeth extending upwardly and inwardly from its lower peripheral margin configured to lockingly engage with the lip of the container for sealing. The inner ring is circumscribed by a rupturable line of weakness which ruptures upon any attempt to prise off the lid, providing evidence of tampering. The container is legitimately opened by manually tearing away the bottom portion of the inner ring along its line of weakness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.