FIELD: packing; detachable fastening on flexible packs to demonstration conveyor belt with provision of separation of packs from belt without violation of sealing. SUBSTANCE: device has sealing lips forming cross seals on pack blank which is divided into two parts. Sealing lips have fastening plates secured from below and provided with fastening members thermally attaching conveyor belt to upper edge of each filled up pack simultaneously with formation of cross seals by means of sealing lips. EFFECT: simplified fastening of pack to conveyor belt, as compared with existing device. 14 cl, 9 dwg
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