Blister pack for an optical lens

US5609246A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Sharla Borghorst · Frankfurt am Main, DE
• Erich Baumann · Goldbach, DE
• John Golby · Aschaffenburg, DE
• Peter Hagmann · Erlenbach a.Main, DE
• Peter Herbrechtsmeier · Königstein, DE
• Otto Kretzschmar · Lorsch, DE
• Bernhard Seiferling · Goldbach, DE
• Michele De Lucchi · Milano, IT
• Torsten Fritze · Milano, IT
• Masahiko Cubo · Milano, IT

Key dates

• Filing date: May 3, 1995
• Grant date: Mar 11, 1997
• Expiry date: May 3, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S134/901
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

The blister pack comprises a base portion and a cover layer. The base portion comprises a hollow chamber that contains a soft hydrophilic contact lens and a sterile aqueous preserving solution, and a substantially flat flange that extends right round the outside of the hollow chamber. The cover layer is releasably sealed to the flange in a sealing zone that extends right round the circumference of the hollow chamber. The flange comprises a grip region that extends from one side of the hollow chamber beyond the sealing zone and is covered by a corresponding grip region of the cover layer but is not sealed thereto. The hollow chamber comprises a dish-shaped main chamber and, adjoining the side of that main chamber, a secondary chamber in the shape of a channel tapering on all sides away from the main chamber, the main chamber making a smooth transition into the secondary chamber, and the main chamber and the secondary chamber together having a drop-shaped contour in the plane of the flange, the tip of which contour is directed towards the grip region of the flange. Provided in the grip region of the flange is an oval opening by means of which the overlying grip region of the cover la…