Easy-open ecology end

US4024981A · kind A · utility

Assignee

• Ermal C. Fraze · US

Inventor

• Omar L. Brown · Dayton, US

Key dates

• Filing date: Jul 1, 1976
• Grant date: May 24, 1977
• Expiry date: Jul 1, 1996

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D2517/0079
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

An improved easy-opening end structure includes a retained tab and a captured, retained panel, the latter defined by a scoreline and forming a pour opening upon fracture of the scoreline. The tab is fixed to the end wall, other than to the panel, and includes an opening end positioned over the panel and a lifting end spaced from the panel. The panel is connected by a retaining strip to the end wall, the retaining strip being formed between scoreline segments which are laterally located relative to the rivet. The rivet is surrounded by a rivet well of reduced thickness of material, a portion of the scoreline passing through the rivet well, while a coined formation defining a transition zone extends laterally of the rivet and overlies the portion of the scoreline located laterally of the rivet. The panel includes a depression formed therein forward of the retaining strip and located between the ends of a bead which is formed in the panel. The end wall also includes a bead which terminates in coined end sections, the end wall bead surrounding a portion of the scoreline and the coined sections being spaced on each side of the rivet. The tab operates to effect opening of the end structu…