Easy-open package with outwardly projecting open tab

US5002223A · kind A · utility

Assignee

• Firma Schmalbach-Lubeca AG · DE

Inventors

• Georg Bolte · Vechelde, DE
• Dieter Heinecke · Wendeburg, DE
• Gunter Hexel · Braunschweig, DE

Key dates

• Filing date: Jan 11, 1990
• Grant date: Mar 26, 1991
• Expiry date: Jan 11, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S229/924
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

An easy-open package comprises a vessel part forming an upwardly open compartment and having an annular rim surrounding the compartment and a foil part adhered to the rim of the vessel part all around the compartment, unitarily formed with an open tab which projects laterally past the rim, and formed with a tear line extending around the compartment except at the tab and extending to an outer periphery of the foil part to each side of the tab. One of the parts is formed as a laminate including a metal layer, a synthetic-resin layer, and a relatively weak bond securing the synthetic-resin layer to the metal layer. The synthetic-resin layer of the one part is bonded to the other part along an annular strip running around the rim with a relatively strong bond and the one part is formed in the synthetic-resin layer with at least one secondary tear line at the tab.