Hightight film package

US5462164A · kind A · utility

Inventors

• Herman Cornelissen · Aartselaar, BE
• Paul Wouters · Vilvoorde, BE

Key dates

• Filing date: Sep 7, 1994
• Grant date: Oct 31, 1995
• Expiry date: Sep 7, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C3/00
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A lighttight package for rolled light-sensitive material includes a core, light-impervious flanges at opposite ends of the core, a roll of the light-sensitive material wound on the core between the flanges, and a light-shielding circumferential wrapper enclosing the roll. The flanges each have a circumferential groove extending radially inwardly from the periphery thereof into which the axial margins of the wrapper are folded radially inwardly and inserted and retained, preferably by a clamping action. The groove is defined between opposed wall sections of the flange and at least one of the wall section can be relatively flexible to facilitate insertion of the wrapper margin therein. The inner termination of the wrapper margin within the groove can be re-entrantly bent and a cord or string can be laid within the re-entrant bend to provide greater security against premature withdrawal of the wrapper margins from the groove. The wrapper can be attached at a trailing edge to the leading end of the material roll so that a free opposite edge of the wrapper can serve as a leader for starting the unwinding of the roll.