The Rapid-Ply Band Builder is a belt-type tire band building machine providing a means to rapidly change the tire band size over a substantial range. The adjustment for band circumference is variable within its design limits. Size is set quickly by turning a handwheel or by a power drive for larger machines. Each machine uses two conveyor-type flat belts, with either metal or cemented splices, depending on the machine size. These belts, referred to as the “building belt” and “hugger belt”, are used in tandem for carrying the plies and for squeezing out the air as the band is built. RJS offers band builds in four different sizes.