| 摘要 |
<p>The device (1) is associated, in line, to an outlet of a packing machine and is designed to seal superposed flaps (Ls, Li) of packs (C), at longitudinal vertical sides (V) thereof. The device includes apparatus (2) for receiving and moving the packs (C) and includes two batteries (3, 4) of heat-welding rollers (30, 40), having a vertical axis, for acting on respective longitudinal vertical sides (V) in order to heat the flaps (Ls, Li) up to a temperature which is sufficient to cause joining by aggregation of the packing material. Cooling is provided downstream of the batteries (3, 4) for acting on the flaps (Ls, Li) in order to lower the temperature thereof and thus stabilize the joint.</p> |
