Method and device for cleaning deposited material from a molding surface of a mold for forming ophthalmic lenses

US10035177B2 · kind B2 · utility

Assignee

• Novartis AG · CH

Inventors

• Gabriela Cocora · Elsenfeld, DE
• Halina Heidrich · Kahl am Main, DE
• Fabian Kern · Amorbach, DE
• Axel Heinrich · Aschaffenburg, DE
• Volker Lanig · Giebelstadt, DE

Key dates

• Filing date: Dec 7, 2015
• Grant date: Jul 31, 2018
• Expiry date: Nov 22, 2036

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29D11/00519
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method of cleaning deposited material from a molding surface (10) of a mold (1) for forming ophthalmic lenses, including bringing a cleaning head (20) into contact with the molding surface (10), the rotational axis (22) of the cleaning head (20) being arranged normal to the molding surface (10), rotating (220) the cleaning head (20) around the rotational axis (22) while maintaining the contact between the cleaning head (20) and the molding surface (10), moving the cleaning head (20) to perform a precession motion (110) around a central normal (11) on the molding surface (10), while rotating (220) the cleaning head (20) around the rotational axis (22) and while maintaining the contact between the cleaning head (20) and the molding surface (10). During the precession motion (110) the rotational axis (22) includes an inclination angle (α1,α2) with the central normal (11) on the molding surface (10).