Method of splicing coated flexible films and product thereof

Claim 1

A METHOD OF SPLICING TOGEHTER ADJACENT EDGE PORTIONS OF ABRASIVE COATED SHEET MATERIAL COMPRISING A FLEXIBLE LINEAR ORIENTED POLYETHYLENE TEREPHTHALATE FILM BACKING AND A LAYER OF ABRASIVE GRITS ADHESIVELY BONDED TO ONE SURFACE OF SAID BACKING, SAID METHOD COMPRISING REMOVING THE ABRASIVE GRITS AND ADHESIVE FROM ONE OF SAID ADJACENT EDGES SO AS TO BARE THE UNDERLYING FILM SURFACE, COATING AT LEAST ONE OF SAID BARED SURFACE AND A CORRESPONDING SURFACE AREA OF THE POLYTHENE TEREPHTHALATE BACK OF THE OTHER SAID EDGE WITH A TRUE SOLVENT FOR POLYETHYLENE TEREPHTHALATE, SAID SOLVENT BEING APPLIED IN LIQUID FORM, OVERLAPPING SAID ADJACENT EDGES WITH SAID BARED SURFACE OF SAID ONE EDGE IN CONTACT WITH THE BACK SURFACE OF SAID OTHER EDGE, FIRMLY PRESSING THE LAPPED EDGES TOGEHTER BETWEEN PRESSURE BARS, HEATING SAID LAPPED EDGES AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO EFFECT A FIRM BOND AT THE SPLICE WITHOUT SUBSTANTIALLY DE-ORIENTING THE SPLICE FILM BACKINGS.