Artificial abrasive articles

Claim 1

AN ABRASIVE ARTICLE OF THE TYPE IN WHICH THE COMPONENTS THEREOF ARE BATCH MIXED, MOLDED INTO SHAPE AND CURED TO PROVIDE THE STRUCTURAL FORM OF THE ARTICLE CONSISTING ESSENTIALLY OF A MAIN BODY PORTION CONSTITUTING THE MOTHER MATRIX OF THE ARTICLE, SAID MAIN BODY PORTION BEING FORMED OF ABRASIVE GRAINS AND BONDING MATERIAL THEREFOR, SAID ABRASIVE GRAINS BEING FIRMLY AND INDEPENDENTLY BONDED TO EACH OTHER TO PROVIDE THE MOTHER MATRIX WITH SAID ABRASIVE GRAINS BEING THE MAIN ABRASIVE GRAINS OF THE ABRASIVE ARTICLE AND PORVIDING IN THEIR BONDED STATE THE STRUCTURAL STRENGTH AND WEARING SURFACE OF THE ARTICLE, PELLETS OF ABRASIVE GRAIN AND BONDING MATERIAL, THE ABRASIVE GRAINS OF SAID PELLETS BEING OF SIMILAR HARDNESS AND RESISTANCE TO FRACTURE AS SAID MAIN ABRASIVE GRAINS, SAID PELLETS BEING PRESENT IN SAID MATRIX AS A BATCH MIXED DISPERSED ADDITIVE, THE ABRASIVE GRAINS OF SAID PELLETS BEING WEAKLY BONDED TO EACH OTHER, THE BONDING MATERIAL AND THE AMOUNT THEREOF USED IN SAID PELLETS WEAKLY RETAINING THE ABRASIVE GRAINS OF SAID PELLETS IN BONDED ASSOCIATION WITH EACH OTHER AS COMPARED TO THE FIRM BONDING OF SAID MAIN ABRASIVE GRAINS TO EACH OTHER IN SAID MATRIX, SAID ABRASIVE GRAINS OF SAID PELLETS BEING OF A SIZE AND BEING PRESENT IN SUFFICIENT NUMBER IN SAID PELLETS TO PROVIDE EXTERIORLY LOCATED AS WELL AS INTERIORLY LOCATED GRAINS, THE EXTERIORLY LOCATED A WELL AS INTERIORLY LOCATED GRAIN, THE BONDING IN SAID MATRIX WITH THE INTERIOLY LOCATED GRAINS OF SAID PELLET BEINGS FREE FROM BONDIND WITH SAID MATRIX, SAID INTERIORLY LOCATED GRAINS IN SAID PELLETS BEING SUBJECT TO BODILY DISLODGMENT IN THE WORKING SURFACE OF SAID ARTICLE WHEN IN USE MORE READILY THAN SAID MAIN ABRASIVE GRAINS IN SAID MATRIX, THE ABRASIVE GRAINS OF SAID MATRIX AND SAID PELLETS HAVING A HARDNESS OF 9 OR HIGHER ON THE MOHS SCALE, SAID PELLETS BEING OF A SIZE SUBSTANTIALLY 1/3" TO 3/16" IN DIAMETER, AND SAID PELLETS CONSTITUTING IN THE ORDER OF 15% TO 25% BY WEIGHT OF THE MIXTURE FROM WHICH THE ARTICLE IS MOLDED.