Contact lens cast moulding and packaging

Details Contact lens cast moulding and packaging Contact lens cast moulding and packaging

B - Operations, Transporting

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B29D 11/00 (2006.01) B29C 35/02 (2006.01) B29C 43/36 (2006.01) B29C 43/54 (2006.01) G02C 7/04 (2006.01) B29C 35/08 (2006.01)

Patent

CA 2001948

A mould for cast moulding a contact lens comprises a first cup member having a male mould surface and a second cup member with a female mould surface. The two cup members form a piston and cylinder and are used in a pressure vessel so as to apply loading pressure to deflect the mould surfaces to maintain the surfaces in contact with a lens being cast. The mould is opened with the mould surface facing upwardly. Hydrating fluid is added to the first cup member and a cover sealed to the top of the first cup member.

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