and connected to another arm of the bell crank lever whereby the plates 150 are projected upwardly through the slots 16 the motor 156 is coupled to the frame 36 a collar assembly unit is accordingly thrust upwardly from the pallet 14 between the open lever ends 142 to upwardly displace the stack the levers thereupon closing to hold the unit in line with the accumulated stack as the pusher plates now descend to an out of the way position beneath the path of the pallets for constraining the accumulating stack a plurality of spaced vertical pins 158 adjustably depend from the top of the frame 136 it will be understood from the foregoing that collar production may be continuous the initial juxtaposed stacks x y and z being converted into collar assembly units c in superposed relation each time the pallet 14 passes through a ply laying station 18 20 or 22 another ply is deposited in predetermined position by a holder 24 the assembled units c can be successively tacked together at station 30 and then as thus preassembled accumulated at the station 32 until it is desired to remove them for further processing as above mentioned there are occasions when it is desirable to turn over successive plies of a stack of fabric prior to its registration in an assembly in the case of colored or patterned piece goods that have a 34 face 34 side for instance the plies will be loaded onto the platform 44 with their face.