distance between the toes of a weld

Where a butt weld has been used, the excess thickness must not exceed 1/4 of the width of the weld.

Secondly, the width of the weld does not depend on the magnitude of the current.

This function allows control over the width of the weld and the penetration depth.

Excess-weldment is then removed from top, bottom and edge surfaces of the composite strip such that the width of th weld is identical to the width of the first and second strips.

The quality and width of the longitudinal seal (6) can be adjusted by changing the amount that the film is preheated before sealing.

The thermoplastic synthetic material is continuously melted and applied using an applicator nozzle (44) across at least the entire width of the weld (16).

In the weld seams, at least one indentation (6) is formed, extending from the outer edge inwards over a section of the width of the weld seam.

The length of the at least one indentation (6) is between 1/5 and 4/5, particularly between 1/3 and 2/3 of the width of the weld seam.