Process and apparatus for the manufacture of a contact lens

Details Process and apparatus for the manufacture of a contact lens Process and apparatus for the manufacture of a contact lens

1997-03-26

1999-04-13

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264 138, 264 26, 4251744, 4251748E, 425808, B29D 1100

Patent

active

058940022

ABSTRACT:
In a process for the manufacture of contact lenses, a polymerizable contact lens material is dispensed into a mould half (1) and the mould is subsequently closed by means of the second mould half (2). The material located between the two mould halves in the moulding cavity (12) is then polymerized, thus forming an as yet unhydrated contact lens (CL). The moulding surface of one of the two mould halves (1, 2) is pre-treated, before use, in a region (20) outside the optically active zone of the contact lens (CL) in such a manner that, when the mould is opened, the contact lens (CL) adheres to the pre-treated mould half.

REFERENCES:
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patent: 3660547 (1972-05-01), Ruekberg
patent: 4257755 (1981-03-01), Lemelson
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patent: 5158718 (1992-10-01), Thakrar
patent: 5294379 (1994-03-01), Ross et al.
patent: 5326505 (1994-07-01), Adams et al.
Bloss, Fritz, "Zur Koronabehandlung von Formteilen" Vorbehandeln.
Softal Report, Mechanismender Korona-Entladung.
Kunststoffober flachen, Aktivieren von, "Koronaentladung ist eine umwelt freundliche Vorbehandlung," TR Hett 31, 1993.

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