APPARATUS AND METHOD FOR FORMING A STRING OF POCKET SPRINGS

摘要

An apparatus (1) for forming a string (70) of pocket springs comprises a tube forming device (23-25) for forming a tube (50) of pocket material. The apparatus (1) comprises an ultrasonic welding device (30) configured to receive the tube (50) of pocket material and to form a transverse seam which extends between adjacent pockets (71 -74). The apparatus (1) comprises a deflection device (40) configured to deform at least one side portion of the tube (50) of pocket material towards an interior of the tube (50) of pocket material before the ultrasonic welding device (30) forms the transverse seam.