Patent ID: 6510362
Filing Date: 2003-01-21
Classification: B24B

Abstract:
Method of determining the trajectory of a groove to be machined in an edge of a lens adapted to be fitted to a spectacle frame, each rim or surround of the spectacle frame having a rigid part with an operative portion and a filament extending from an end of the rigid part to another end thereof, the operative portion of the rigid part and the filament being adapted to be received in a groove machine in an edge of a lens, the method comprising the steps of:providing a first set of data corresponding to the curvature of the front and rear faces of the lens, and providing a second set of data corresponding to the curvature of the operative portion of the rigid part, and determining the trajectory of the groove to be machined in the portion of the edge of the lens corresponding to the operative portion of the rigid part of the spectacle frame as a function of the first and second sets of data.