B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
B29D 11/00 (2006.01) B23K 9/013 (2006.01) B29C 37/00 (2006.01) B29C 59/10 (2006.01) C07C 62/32 (2006.01) B29C 39/00 (2006.01)
Patent
CA 2048196
Hydrophobic casting moulds are treated with electrical discharge, such as corona discharge, to provide enhanced compatibility with hydrophilic objects introduced into the mould, without interfering with the release properties of the mould. A preferred embodiment involves treatment of contact lens casting moulds with corona discharge to provide improvements in the lens manufacturing procedure, as well as enhancement in the quality of the contact lenses themselves. The invention is particularly applicable to the production of contact lenses having a coloured iris pattern imprinted thereon.
Evans John M.
Phoenix John Thomas
Skipper Richard Stuart
Stafford Peter Harold
Thakrar Ashrok
Blake Cassels & Graydon Llp
Novartis Ag
Pilkington Visioncare Inc.
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