Container lid having an opening device

US4533063A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Norbert Buchner · Winnenden, DE
• Rolf Eberspacher · Rommelshausen, DE
• Dieter Liede

Key dates

• Filing date: Sep 21, 1983
• Grant date: Aug 6, 1985
• Expiry date: Sep 21, 2003

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D2517/0088
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A lid for a packaging container which include a tear-open part which is surrounded by a weakened line. The lid is molded of a composite material, which has an outer carrier layer of plastic, a middle barrier layer of metal foil and an inner heat-sealing layer of a thermoplastic synthetic material. The weakened line is produced as an indentation in the outer carrier layer by being heat-impressed using a heated tool.