Patent ID: 7771248
Filing Date: 2010-08-10
Classification: B24B

Abstract:
1. An automatic machine for arrissing edges of a glass sheet which is substantially flat and arranged in a vertical plane, comprising: a machine body; at least two working stations mounted on said machine body, so as to come into contact with edges of said sheet and to move with respect to said sheet along a perimeter thereof; said at least two working stations each comprising a working head which is movable transversely to the vertical plane of said sheet; said working head comprising an abrasive tool of a grinding wheel type for performing arrissing, and at least one probe arranged upstream of a work area of said abrasive tool with respect to a direction of relative advancement of said tool with respect to said sheet so as to come into contact with the sheet edge being worked before said abrasive tool; said working head further comprising sensors which are adapted to detect a relative movement between said at least one probe and said abrasive tool due to local misalignment between the sheet edge being worked and said abrasive tool; a machine controller for receiving feedback signals from said sensors; actuation means controlled by said controller in response to said feedback signals, for adjusting mutual arrangement of said abrasive tool with respect to the sheet edge being worked; a vertical post of said body; and wherein the working heads comprise a first working head and a second working head which are both arranged and movable vertically on said vertical post, said first working head being movable vertically in opposite directions along a first vertical axis, said second working head being movable in opposite directions along a second vertical axis, said first vertical axis and said second vertical axis being mutually independent and distally arranged from each other at opposite sides of said vertical post.