Container cover with peelable liner
US4253580A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1979 |
| Grant date | Mar 3, 1981 |
| Priority date | — |
| Expiry date | Aug 17, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D53/00
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A container closure for use in packaging flowable materials is disclosed comprising a closure shell, a peelable thermoplastic liner disposed on the inner surface of the shell and having a thick periphery and a comparatively thin central portion with a demarcated peeling tab extending to the periphery of the liner, and at least one adhesive interfacial layer separating the liner from and peelably bonding said liner to the shell and having a non-adhesive or weakly adhesive zone underlying and corresponding to the periphery of the liner and a relatively strongly adhesive zone underlying and corresponding to the central portion of the liner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.