plurality of clamps 86 pivotably mounted on a shaft 88 supported between a pair of substantially l shaped arms 90 which straddle top plate 36 connected between the lower portions of l shaped arms 90 is a bar 92 the belt loops 22 are threaded into clamp 86 which contains a leaf spring 94 having teeth 96 at one end thereof for frictionally gripping each loop as it passes therethrough and prevents its movement in a direction to the left as viewed in fig7 once threaded through the clamp 86 the top edge of a substantially vertical plate 98 supports plate 36 an elongated rod 100 and 102 each have one end thereof fixed to plate 98 rods 100 and 102 extend through an opening in bar 92 beneath conveyor belt 40 through an upright vertical plate 104 fixed to the frame 34 of apparatus 20 on the opposite side of the conveyor 40 and is fixed to an upright vertical plate 106 the opposite ends of rods 100 and 102 extend through plate 106 and are slidable through a fixed upright guide plate 108 on frame 34 of apparatus 20 a third rod 110 is provided which extends through a.