Photochemical frangible closure

US6213324A · kind A · utility

Assignee

• EASTMAN KODAK COMPANY · US

Inventors

• Scott H. Schwallie · Rochester, US
• Linn C. Hoover · Webster, US
• Gerald L. Johnson · Carthage, US
• John Rzepka · Rochester, US

Key dates

• Filing date: Nov 17, 1999
• Grant date: Apr 10, 2001
• Expiry date: Nov 17, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D41/50
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A frangible closure has a closure sheet having a central weakness formed substantially though a medial portion. The central weakness has a thickness and a central portion of greater thickness than the thickness of the central weakness so as to resist shearing of the central weakness. A lateral skirt surrounding the closure has at least a partial radial weakness therebetween for cooperating with the central weakness and enabling the central weakness to fracture.