Process for the manufacture of endless coated abrasive articles

Claim 1

Process for the manufacture of an endless coated abrasive article comprising the following steps: a. cutting a coated abrasive material at a first location along the longitudinal edge at an angle to the length direction thereof such that the length of the cut edge is equal to the circumference of the article to be fabricated; b. cutting said material at a second location along said longitudinal edge and at a predetermined distance from said first location so as to provide a second cut edge parallel to said first cut edge thereby forming a strip of abrasive material having the shape of a parallelogram; c. winding said strip of abrasive into a spiral comprising a plurality of coils having the abrasive surface on the outside of said coils whereby said longitudinal edge is in abutting engagement with the other longitudinal edge of the parallelogram, said spiralled abrasive strip having an inner and outer periphery; d. rotating said spiralled abrasive strip about its own axis while said strip is rotating e. applying to said inner periphery smooth, uniformly thick, a resinous composition whereby said composition forms a continuous layer on the inner periphery of the coiled strip of abrasive material; and f. curing said resinous compositon thereby providing an endless coated abrasive article of unitary construction and of greater width than said strip of abrasive material.