coordination u shaped slot 472a of front assembly positioning means 472 engages and pushes assembly control means 674 of front assembly 630 as assembly control means 674 are pushed forward or rearward by u shaped slots 470a 472a linkages 672 cause upper and lower legs 654 656 to assume the receiving position rear and front assembly position means 470 472 then force lower clamp control levers 662 upward causing lower clamp arms 650 to open clamp actuator means 476 then engage actuator engagement slots 653 of upper clamp pivots 652a and rotate the same upon completion of the above steps fixture 600 is positioned beneath carriage 412 in the receiving position carriage 412 is then lowered vertically down track 401 until assemblies 633 630 are flanked by two sets of clamp arms 414 on each side and the top edge of the brief still held by clamp arms 414 is approximately level with the top ends of upper legs 656 the crotch portions of the brief that is the fabric strips between the leg cut outs are disposed between lower legs 654 and lower clamp arms 650 next lower clamp control levers 662 are released by assembly positioning means 470 472 and upper clamp pivots 652a are rotated by clamp actuator means 476 as a result the brief is captured securely by the upper.