Banderolling apparatus

Claim 1

Apparatus for the banderolling of a plurality of objects, comprising means for supporting said objects as a unit, means for supplying banding material to said unit, means for supplying banding material to said unit and wrapping it in a loop around the latter, clamp means for holding the banding material at the neck of said loop, and a device for forming a weld seam between opposed areas of the banding material at the said neck, characterised by the improvement wherein said clamp means comprises four clamps arranged as two spaced apart pairs of clamping jaws, one of each pair being movable and the other immobile, said pairs of jaws defining a narrow space therebetween, said welding device arranged and movable in said space between said immobile jaws of the two pairs into and out of welding contact with said banding material, at least one of said immobile jaws including a plurality of parallel air channels therein communicating with a source of cooling air to provide cooling air from said source through said channels to the weld seam, said cooling air escaping from said weld seam area through said space, said channels disposed along a path substantially parallel a clamping surface which path substantially coincides with the intersection between the clamping surface of said one of said immobile jaws and said air escape space.