Method and apparatus for manufacturing plastic lenses

Details Method and apparatus for manufacturing plastic lenses Method and apparatus for manufacturing plastic lenses

1978-02-06

1980-05-13

Vlachos, Leonidas

Turning

Axial pattern

Pivoted tool rest

82 11, 82 25, B23B 540

Patent

active

042022266

ABSTRACT:
The method of making plastic lenses ready for fitting to the contour of the wearer's eye comprising supporting a blank of plastic at one end for rotation about a predetermined axis, turning the blank down to a predetermined diameter, making an annular face cut at the distal end of the blank of predetermined radial width, making a spherically concave base cut at said distal end of predetermined depth relative to said annular face cut, reversing the blank end-for-end, making a first spherically convex cut at said end of the blank of a predetermined radius such that the distance between the inner and outer surfaces is of a predetermined thickness and making a flange cut at the marginal edge of the outer convex surface of lesser radius of curvature; and apparatus for carrying out the method.

REFERENCES:
patent: 1264375 (1918-04-01), Derrom
patent: 3100955 (1963-08-01), Kratt
patent: 3909982 (1975-10-01), Schlodtfeldt
patent: 4084458 (1978-04-01), Galley

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