Plastic-sheet welding machine - has oblong welding tool between each pair of rotary welding wheels

摘要

Two plastic sheets are welded together to form packages in a machine having pairs of rotary welding wheels. Two oblong welding tools work together to form seams at right angles to those produced by the wheels. An oblong welding tool is mounted between the wheels in each pair, and rotates with them on a common axis. There can be several such tools between the wheels in each pair, and they can be easily interchangeabe.