Tamper-indicating closure and package
US4801030A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1987 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Sep 14, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D41/3428
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A tamper-indicating closure and package comprising a one-piece molded closure of plastic which threads onto a container such that when the closure is unthreaded, a tamper-indicating band becomes separated from the lower end of the closure skirt. The tamper-indicating band is joined to the closure along a weakened frangible line. A flexible annular wall is formed within the band and extends inwardly and upwardly when the closure is applied to container finish. The band further includes a plurality of circumferentially spaced flexible walls extending circumferentially and fastened at their circumferential ends to the inner surface of the annular wall and having portions intermediate their ends which extend radially inwardly. When the closure is applied to the container, the intermediate portions of the circumferentially extending walls are flexed radially outwardly intermediate their ends over the annular bead on the container and then flex radially inwardly beneath the annular bead while the annular wall is interposed between the skirt of the closure and the annular bead on the container. When the closure is unthreaded, the upper edges of the circumferentially spaced circumferential…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.