Process, block or sucker for a machine for grinding or machining

Details Process, block or sucker for a machine for grinding or machining Process, block or sucker for a machine for grinding or machining

1993-05-03

1995-04-25

Rachuba, M.

Abrading

Machine

Combined

451277, 451390, 451256, B24B 2500

Patent

active

054087929

ABSTRACT:
A process, a block or sucker, and an apparatus for machining the edge and optionally the optical surfaces of eyeglass lenses. The block or sucker is of circular shape and has a diameter which, at least in some areas, extends beyond the dimensions of the finished outline of the eyeglass lens. The block or sucker is attached to one major surface of the eyeglass lens blank during the machining operation. The block or sucker is inserted in a holder of a device for machining the edge of the eyeglass lens blank. The edge of the eyeglass lens is machined in accordance with the prescribed outline. The block or sucker may be machined at least in certain areas down to the outline of the eyeglass lens itself, whereafter the block of sucker is detached from the completely machined eyeglass lens and disposed of. Prior to edging the eyeglass blank, the optical surface may also be machined using the same block or sucker. The machining of the optical surface and the edge of the eyeglass lens can be performed in separate machines for machining the optical surfaces and for machining the edge of the eyeglass lenses without having to detach the block or sucker from the eyeglass lens blank, however, it is preferable to perform machining in a combined machine in which the optical surfaces and the edge of eyeglass lenses are machined. A CNC control unit is preferably used for electronically controlling the various operations of the apparatus.

REFERENCES:
patent: 4686798 (1987-08-01), Peffy
patent: 4829715 (1989-05-01), Langlois
patent: 4870784 (1989-10-01), Ramos
patent: 4885875 (1989-12-01), Coper
patent: 4908996 (1990-03-01), Friedman
patent: 5056270 (1991-10-01), Curcher
patent: 5149337 (1992-09-01), Watanabe
patent: 5161333 (1992-11-01), Lecerf

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