Apparatus for grinding or polishing flat glass

Claim 1

APPARATUS FOR OPERATING ON A CONTINUOUSLY MOVING RIBBON OF GLASS, COMPRISING A PLURALITY OF CO-AXIAL PAIRS OF TOOLS OF WHICH THE TOOLS OF EACH PAIR CO-ACT TO OPERATE SIMULTANEOUSLY ON THE TWO SURFACES OF THE RIBBON, PAIRS OF DRIVING ROLLS BETWEEN SAID PAIRS OF CO-AXIAL TOOLS TO DRIVE THE RIBBON BETWEEN THE TOOLS OF EACH PAIR, AND INDIVIDUAL TRAVELLING SUPPORT FOR EACH TOOL OF A PAIR DISPOSING THE RESPECTIVE TOOL FOR ROTATION IN A PLANE PARALLEL WITH THE PATH THROUGH WHICH RIBBON IS MOVED BY THE DRIVING ROLLS, A FIRST MOTOR CARRIED BY EACH SAID SUPPORT TO EFFECT OPERATIVE ROTATION OF THE TOOL CARRIED THEREBY, A PAIR OF LINEAR TRACKS INDIVIDUAL TO EACH SAID SUPPORT DISPOSED IN SPACED RELATION TO PERMIT LATERAL MOVEMENT OF THE SUPPORT THEREBETWEEN, TRAVERSING MEANS CARRIED BY EACH SUPPORT CO-OPERATING WITH EACH OF THE RESPECTIVE TRACKS TO EFFECT LATERAL MOVEMENT OF THE SUPPORT ALONG SAID TRACKS, A REVERSIBLE SECOND MOTOR CARRIED BY EACH SAID SUPPORT AND REDUCTION GEARING CONNECTING THE REVERSIBLE MOTOR WITH THE TRAVERSING MEANS TO PRODUCE RELATIVELY SLOW LATERAL MOVEMENT OF THE SUPPORTS AS COMPARED WITH THE RATE OF ROTATION OF THE TOOLS CARRIED THEREBY.