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1. (WO2017037428) METHOD AND APPARATUS FOR MANUFACTURING CONTACT LENS MOULDS

Pub. No.:    WO/2017/037428    International Application No.:    PCT/GB2016/052644
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Fri Aug 26 01:59:59 CEST 2016
IPC: B29D 11/00
B23B 31/30
Applicants: COOPERVISION INTERNATIONAL HOLDING COMPANY, LP
Inventors: DEAN, Gregg A.
BALL, Colin
Title: METHOD AND APPARATUS FOR MANUFACTURING CONTACT LENS MOULDS
Abstract:
A collet (230) for holding a contact lens mold half (240) during machining of a surface of the mold half (240) comprises a disc (235) having a face and defining: a central structure (250a), at the centre of the face, for receiving a head portion (240a) of the mold half (240), and an elongate recess (250b), in the face, for receiving a tail portion (240b) of the mold half (240), the elongate recess (250b) extending from the central structure (250a) along a radius of the disc (235).