Tire building machines for passenger car tires, light-truck, [ medium and heavy ] truck tires [ and for agricultural tires ] ; batch-off rubber slab cooling machinery, namely, rubber slab belt cooling conveyers; feeders for rubber mixers, extruders and mills; mill blenders; stock slitters for use in slitting rubber; strip coolers for use in cooling rubber strips; accessories for rubber slab cooling machinery and strip coolers, namely, platforms for the operator, apparatus consisting of an adj...