Method and apparatus for moving a welding jaw
AssigneeRovema Verpackungsmaschinen GmbH
InventorsRoman Kammler, Walter Baur
Life of this patent
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Abstract
To be able to weld different items, in particular films of different thickness and composition, in an optimized way in each case, it is proposed in the case of a welding jaw circulating along a closed path, for example a transverse welding jaw of a vertical tubular bag machine, to provide a sealing time factor (Kt) that can be set as desired within an open interval from zero to one and is equal to a quotient of a sealing time (ts) and a cycle time (tz) for a circulation of the welding jaw.
Claims12
Method for moving a welding jaw of a transverse sealing station of a vertical tubular bag machine, the welding jaw being moved along a closed path, and the path having a straight portion, which is provided for making contact with an item to be welded, in particular a film tube pressed together between the welding jaw and a second, oppositely running welding jaw, the item and the welding jaw being moved further at the same speed in the direction of the straight portion, in order to weld the item by exposure to the heat of the welding jaw within a sealing time (ts), and two drives, acting in different directions that are preferably perpendicular to each other and moving the welding jaw, 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 preferably predetermined for each bag length (L), is a value in an open interval between zero and one, preferably between 0.1 and 0.8, which describes which time fraction is provided as a percentage of the cycle time (tz) for the sealing time (ts) along an effective sealing path (Zseff), and is formed by the equation Kt=ts/tz;
- and in that the drives are operated in such a way that the sealing time factor (Kt) is maintained.
Dependencies are inferred from the claim text.