Patent attributes
The invention relates to a machine comprising a train of grinding stones (21), mounted to rotate about a first axis (A–A′), a lens support (15), provided with means (37), for rotating the lens (35) about a second axis (B–B′) parallel to the first axis (A–A′), means (13, 39) for relative radial and axial positioning of the lens support (15) with relation to the train of grinding (21) and a tool carrier unit (17) with a tool (81; 83; 85) fixed to a tool support shaft (75) rotating about a third axis (C–C′). In an active position the tool is adjacent to the second axis (B–B′) and the third axis (C–C′) with a variable angle with relation to the second axis (B–B′). The tool support unit (17) further comprises means (79) for controlling the angle of inclination of the third axis (C–C′) with relation to the second axis (B–B′), when the tool (81, 83, 85) is at a distance from the lens (35). Of application to the grinding of ophthalmic lenses.
