g without having to wait for the completion of the stacking sequence the slidable base member 17 returns to the home position the pivot arm 11 is in the vertical position and the garment g remains clinched between the stationary stack bar 12 and the clamping stack bar 14 another garment g 39 is also shown as loaded onto the sewing station s while the stacking operation is underway fig7 a and 7b illustrate the stacking operation as shown in fig7 a the slidable base member 17 is in the home position and the garment g is clamped between the stationary stack bar 12 and the clamping stack bar 14 in order to perform the stacking operation the pivot arm 11 is rotated in the direction of arrow f as shown in fig7 b the garment g is then positioned over the material rest bar 50 as it moves toward the rotating pivot arm 11 at this time the clamping arm 13 is moved to its open position thereby moving the clamping stack bar 14 away from the stationary stack bar 12 and releasing the garment g and leaving it to drape over the material rest bar 50 with reference to fig8 a and 8b the pivot arm 11 has returned to its vertical position the slidable base member 17.