ELECTRICAL INSULATING MATERIAL-NAMELY, CUFFED PAPER INSULATION COILS AND STRIPS; ARMATURE COLLARS; SLOT INSULATORS; ETHYL CELLULOSE TREATED PAPER, FOOD, FIBRE, AND CLOTH INSULATING MATERIAL; AND WOODEN WEDGES USED FOR PERMANENT RETENTION OF WIRE IN ROTOR AND STATOR SLOTS OF ELECTRIC MOTORS