Abstract: According to the present invention there is provided an anvil assembly adapted for selective cooperation with a horn operatively connected to an ultrasonic wave generator such as to enable a textile workpiece disposed between the horn and the anvil assembly to be cut with the cut and simultaneously sealed. The anvil assembly comprises an anvil and a cradle, the anvil adapted to be selectively mounted onto the cradle in any one of at least two mounting positions, wherein corresponding to each mounting position the anvil comprises one peaked longitudinal cutting edge and a corresponding engagement section parallel to a longitudinal axis of the anvil. The corresponding positioning and engagement section is adapted for selective engagement for removably positioning and locked onto the cradle.

Abstract: A tape feeder for feeding elasticizer tape to a stitching machine adapted for stitching the elasticized tape onto a textile workpiece, the tape feeder comprising a tensioning assembly comprising a tensioning assembly comprising a gearbox fitted with a first shaft and a second shaft substantially orthogonal to one another and rotationally coupled to one another via suitable first coupling mechanism and a first roller. A presser mechanism comprising a second roller mounted onto a releasable bracket such that the first and second roller are maintained essentially parallel and biased towards one another for grippingly passing elasticized tape therebetween in response to rotation of one of the rollers. The first and second shaft have a free end for selectively coupling to a suitable driving member. And a mounting structure mountable onto the stitching machine, for supporting the gearbox assembly in either a first position and a second position being in substantially orthogonal relation to one another.