Machine for making tubular bags

摘要

A machine for prodn. of filled tubular packages (5) has welding units for welding longitudinal and lateral seams of the package. Welding units (1) for lateral seams (2) are moved along a preferred path by two motors (3, 6), one (3) producing movement perpendicular to the tube (5) movement (4) and the other (6) producing movement parallel to the tube (5) movement. Coordination of movements is computer (7) controlled. A process is claimed for prodn. of a filled package on a vertical machine in which the speed and direction of movement of welding heads (1) is effected by computer control of the two motors (2, 3) simultaneously.