Patent ID: 7299604

Claim:
Method for moving a welding jaw of a transverse sealing station of a vertical tubular bag machine, comprising the steps of: a welding jaw being moved along a closed path, said path having a straight portion, which is provided for the welding jaw to make contact with a film tube to be welded, pressed together between the welding jaw and a second, oppositely running welding jaw, the film tube and the welding jaw being moved further at the same speed in the direction of the straight portion, in order to weld the film tube by exposure to the heat of the welding jaw within a sealing time (ts), and two electromagnetic linear drives, acting in different directions that are perpendicular to each other and moving the welding jaw, the drives being operated to achieve a circulation of the welding jaw within a cycle time (tz), wherein a sealing time factor (Kt), that can be set as desired for different bag lengths (L), is a value in an open interval between zero and one that describes a time fraction of the sealing time (ts) as a percentage of the cycle time (tz) along an effective sealing path (Zseff), as described by the equation Kt=ts/tz, and wherein the drives are operated in such a way that the sealing time factor (Kt) is maintained.