Container and closure construction for resisting tampering
US4190175A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1976 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Mar 25, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S215/901
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A molded plastic container and closure assembly comprises a container having an upstanding wall adapted to be embraced by the depending skirt of a closure member. To resist tampering or unauthorized removal of the closure, the container has an integrally molded wall means projecting radially outwardly therefrom forming a channel to receive the lower end of the depending skirt. Annular beads formed on the interior wall of the depending skirt cooperate with a bead formed at the free edge of the container opening and with a relatively smooth outer skirt surface to restrict closure removal until the aforementioned wall means are torn away from the container. To facilitate such tearing, the wall means are provided with finger-engageable means and with suitably located weakenings to enable a tearing removal of the wall means by manual gripping and pulling of the finger-engageable means. In a modification, the central portion of the closure is recessed so as to project into the container and brace the interior sidewall of the container against radially inwardly directed forces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.