Outsole and method of attaching same

Claim 1

IN A METHOD FOR ADHESIVELY ATTACHING A SHOE UPPER TO AN OUTSOLE CONSTITUTED OF A PLASTICIZED SYNTHETIC POLYMERIC MATERIAL SELECTED FROM THE CLASS CONSISTING OF HOMOPOLYMERS OF POLYVINYL CHLORIDE, COPOLYMERS OF POLYVINYL CHLORIDE, VINYL ACETATE AND MIXTURES OF THE SAME, WHICH METHOD INCLUDES THE STEPS OF (A) APPLYING A SOLVENT-TYPE ADHESIVE TO SAID OUTSOLE (B) EVAPORATING SOLVENT FROM THE SAID ADHESIVE OUTSOLE (C) HEAT-ACTIVATING THE ADHESIVE REMAINING ON SAID OUTSOLE AND (D) CONTACTING THE ACTIVATED ADHESIVE ON SAID OUTSOLE WITH A HEAT-ACTIVATED COATING OF THE ADHESIVE ON SAID SHOE UPPER, THE IMPROVEMENT WHICH COMPRISES USING AS SAID SOLVENT-TYPE ADHESIVE A SOLUTION OF AN ESSENTIALLY ALIPHATIC HYDROCARBON SOLVENT-INSOLUBLE, LINEAR POLYESTURETHANE ELASTOMER IN A VOLATILIZABLE, NORMALLY LIQUID, ORGANIC SOLVENT SELECTED FROM THE CLASS CONSISTING OF TETRAHYDROFURAN, DIMETHYLFORMAMIDE AND MIXTURES OF THE SAME CONTAINING UP TO 35 WEIGHT PERCENT OF METHYL ETHYL KETONE BASED ON THE WEIGHT OF SOLVENT AND CAPABLE OF SOLVATING BOTH THE SAID ELASTOMER AND THE SAID POLYMERIC MATERIAL, THE SAID ELASTOMER BEING SOLUBLE IN ORGANIC SOLVENTS SELECTED FROM THE CLASS CONSISTING OF TETRAHYDROFURAN, DIMETHYLFORMAMIDE, DIOXAN, CYCLOHEXANONE AND METHYL ETHYL KETONE, THE SAID SOLUTION COMPRISING ABOUT 5.0% TO ABOUT 30.0% BY WEIGHT OF SAID POLYESTERURETHANE BASED ON THE WEIGHT OF THE SOLUTION AND HAVING A VISCOSITY OF ABOUT 50 TO 50,000 CENTIPOISES.