Plastic closure for containers
US4488655A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 1982 |
| Grant date | Dec 18, 1984 |
| Priority date | — |
| Expiry date | May 25, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D41/3423
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A plastic closure having pilfer-proofing characteristics for a container including a mouth-neck portion having formed on its peripheral surface an external thread and an annular flange located beneath it. The closure includes a top panel wall and a cylindrical skirt wall extending downwardly from the peripheral edge of the top panel wall. A breakable line extending circumferentially is formed on the skirt wall to divide the skirt wall into a main portion above the breakable line and a pilfer-proof bottom portion below it, and an internal thread adapted to be fitted with the external thread of the mouth-neck portion of the container is formed on the inner surface of the main portion of the skirt wall. The inner surface of the pilfer-proof bottom portion has formed therein at least one flap extending radially inwardly therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.