Title:
TORIC AXIS ALIGNMENT MACHINE AND METHOD
Document Type and Number:
WIPO Patent Application WO1999036803
Kind Code:
A3
Abstract:
A method and apparatus for practicing the method of making toric contact lenses having a toric axis and ballast axis located on the anterior and posterior surfaces of a lens. Detectable features are formed on the anterior (12) and posterior mold (14) sections corresponding to the location of the toric axis and ballast axis, respectively. An axis alignment tool having detecting means thereon is used to set the mold sections to a known angular position. The desired axial offset is input into a computer which establishes the axial offset between the mold sections.
Inventors:
APPLETON WILLIAM JOHN
DERYKE KEVIN JACOB
DOBNER MICHAEL HENRY
ORMISTON ALLEN LEE
POWELL IAN ANDREW
VANDEWINCKEL JEFFREY MICHAEL
DERYKE KEVIN JACOB
DOBNER MICHAEL HENRY
ORMISTON ALLEN LEE
POWELL IAN ANDREW
VANDEWINCKEL JEFFREY MICHAEL
Application Number:
PCT/US1999/000652
Publication Date:
November 04, 1999
Filing Date:
January 12, 1999
Export Citation:
Assignee:
BAUSCH & LOMB (US)
International Classes:
B29C33/30; B29D11/00; G02C7/04; (IPC1-7): B29D11/00; B29C33/30
Foreign References:
| US5611970A | 1997-03-18 | |||
| EP0788871A2 | 1997-08-13 | |||
| EP0691195A2 | 1996-01-10 | |||
| US4693446A | 1987-09-15 | |||
| US5244377A | 1993-09-14 | |||
| US4786444A | 1988-11-22 |
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