Closure cap with anti-tamper ring

US5715959A · kind A · utility

Assignee

• Crown Cork · CH

Inventors

• Georg Pfefferkorn · Müllheim, DE
• Michael Kirchgessner · Egringen, DE
• Udo Bosl · Eimeldingen, DE

Key dates

• Filing date: May 8, 1996
• Grant date: Feb 10, 1998
• Expiry date: May 8, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D41/3447
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

Closure caps with anti-tamper strips (3) are used to visually display initial opening of a container to the public. The possibility of opening such a container without evidence should be prevented as far as possible. The possibility of stretching the anti-tamper strip (3), in order to then manipulate it past the bead on the container mouth, is here countered by an additional security ring (7). This security ring (7) is arranged coaxially to the actual anti-tamper ring (3). It is connected to the anti-tamper ring and mainly surrounds the lower area (5) of said anti-tamper ring. Access to the actual anti-tamper ring is considerably hindered as a result. In a preferred embodiment, the security ring possesses weakened zones (10) that break during manipulation, so that the interference will be visibly displayed to the outside.