Abstract: 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.

Abstract: A work table on which sheets of patterned cloth are laid for the purpose of matching the patterns includes one or more electromagnets activatable to magnetize an upper surface of the table. Several pins which have magnetizable seats lie at spaced apart locations on the upper surface of the table so that when the electromagnet or electromagnets are activated, the pins are fixed magnetically on the upper surface of the table. When the electromagnet or electromagnets are deactivated, the pins are freely movable across the upper surface of the table. Thus, the cloth sheets can have their patterns aligned while the pins are fixed due to their magnetization, and are freely removed together with the pins when the pattern matching is completed and the electromagnet or electromagnets is switched OFF.