Method of making non-rigid rotative abrasive structures

Claim 1

IN THE METHOD OF FORMING AN ABRASIVE FLAP WHEEL WHEREIN ADJACENT FLAP SECTIONS ARE RIGIDIFIED AND FIRMLY RIGIDLY ADHESIVELY BONDED TOGETHER OVER A SUBSTANTIAL RADIALLY INNER END AREA TO FORM A RIGID REINFORCED INNER RIM PORTION IN SAID STRUCTURE, THE STEPS COMPRISING FORMING A BLOCK OF SUPERIMPOSED ABRASIVE SHEET FLAP SECTIONS, EACH FLAP SECTION HAVING AT LEAST ONE PAIR OF OPPOSED NOTCHES IN THE LATERAL EDGES ADJACENT ONE END THEREOF WITH SAID NOTCHES ALIGNING TO DEFINE OPPOSED GROOVES IN THE LATERAL SURFACES OF SAID BLOCK, APPLYING FLEXIBLE STRETCHABLE BINDING MEANS ABOUT SAID BLOCK WITH SAID BINDING MEANS EXTENDING IN AND ALONG EACH OF SAID GROOVES THEREBY TO UNIFY THE BLOCK, MANIPULATING SAID UNIFIED BLOCK INTO AN ANNULUS WITH SAID ONE END OF SAID FLAP SECTIONS FORMING THE INNER PERIPHERY THEREOF, INSERTING A CIRCULAR FORMING MEMBER INTO A GROOVE IN EACH OF SAID LATERAL SURFACES TO PERFECT THE SHAPE OF SAID ANNULUS, SAID SECTIONS EACH BEING PROVIDED WITH A COATING OF A LIQUID CURABLE ADHESIVE ON EACH SIDE THEREOF OVER A SUBSTANTIAL AREA ADJACENT SAID ENDS, AND CURING SAID ADHESIVE TO A RIGID HARD FIRM STATE.