Pilfer-proof closure for containers and injection mould for producing the closure
US5086938A · kind A · utility
Inventor
Key dates
| Filing date | Jul 26, 1990 |
| Grant date | Feb 11, 1992 |
| Priority date | — |
| Expiry date | Jul 26, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2401/35
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Pilfer-proof closure for containers, having a closure cap (1) of plastic designed as a screw cap, the shell (2) of which is connected in the region of the inner circumference of the shell, via tear-off webs (7), to a pilfer-proof strip (8), the outside of which has a wall section running obliquely outwards and downwards adjoining the webs and which on its inside has a circumferential recess (11) which is open towards the lower end of the pilfer-proof strip, from the upper wall section (12) of which at least one retention member (14) extends which, when the closure cap has been screwed onto the container orifice, engages beneath an annular snap-on projection of the container arranged below the screw thread of the container, the radial depth of the circumferential recess being at least equal to the maximum width of the retention member in axial section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.