FIELD: process engineering.
SUBSTANCE: invention relates to dies used for production of contact lenses with rounded edges. Proposed die set comprises front and rear dies integrated by centering and separating element composed of a ledge on one of aforesaid dies. Front and rear dies are shaped to first and second articles that have central curved section with concave surface, convex surface, annular peripheral edge and ring-like flange.
EFFECT: higher quality and reliability.
2 cl, 4 dwg
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Authors
Dates
2013-06-20—Published
2007-10-24—Filed