7 SEWING MACHINES AND PARTS THEREFOR; AUTOMATED SEWING MACHINE SYSTEMS, NAMELY, SEWING UNITS, SEWING ATTACHMENTS, SEWING MATERIAL LOADING AND UNLOADING UNITS, STACKERS AND REELS FOR SEWING MATERIAL; MACHINE TOOLS FOR MACHINING PARTS OF SEWING MACHINES; PRESSES FOR SEWING MATERIAL AND PARTS OF SEWING MATERIAL; CUTTING MACHINES; PATTERN-MAKING MACHINES; AND FABRIC SPREADING MACHINES; MATERIAL HANDLING SYSTEMS, NAMELY, POWER AND FREE CONVEYORS, HANGER CONVEYORS, DRAG CONVEYORS, BELT CONVEYORS, VERTICAL CONVEYORS, TROLLEY CONVEYORS, ROLLER CONVEYORS, REVOLVING STORAGE RACKS, AND PARTS THEREFOR