Suspended belt-type expandable and movable part holder unit

摘要

A belt-type part holder unit to be used in a track conveyor system of a sewing factory or the like having a large number of work stations in it in order to transfer a part from a work station to another. The unit includes a belt pulley provided in it with a ring-type spring such as a coil spring or a spiral spring so that the belt of the holder unit can be selectively held to an expanded condition or taken up by the pulley and a part of an article of dress held by the holder unit can be sewed without being taken out of the unit.