Patent · US Active

Casting mold for the manufacture of ophthalmic lenses

US10661515B2 · kind B2 · utility

0Cited by

3References

8Claims

0Family size

Assignee

ALCON INC. · CH

Inventors

Jens Hof · Großwallstadt, DE
Burkhard Dietrich · Monheim, DE
Roger Biel · Aschaffenburg, DE

Key dates

Filing date	Nov 19, 2015
Grant date	May 26, 2020
Priority date	—
Expiry date	Nov 26, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG02C7/04
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A casting mold (1) for the manufacture of ophthalmic lenses, in particular hard and soft contact lenses comprises a male mold half (2) having a generally convexly shaped male mold surface (20) and a female mold half having a generally concavely shaped female mold surface (30). Each of the male and female mold surfaces comprises a lens-forming surface (21, 31) which is encircled by a non lens-forming annular edge surface (22, 32). The lens-forming surface (21, 31) comprises a central optical zone (210, 310) and a non-optical peripheral zone (211, 311) surrounding the central optical zone. At least one of the male and female mold halves (2, 3) is provided with at least one permanent marking (10; 11; 12; 110, 111) which is arranged on a surface in the peripheral zone (211, 311) of the lens-forming surface (21, 31) and/or on the non lens-forming annular edge surface (22, 32).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.