FIELD: food industry; sealing of containers with liquid foodstuff. SUBSTANCE: invention relates to ultrasonic sealing devices provided with exciter arranged in center and enclosed by reaction bodies, and bell. According to this method slots are made in reaction bodies. Slots are arranged symmetrically in places where superimposed oscillations have maximum potential or maximum shift, on the contrary. EFFECT: elimination of irregularities at sealing and increased service life of sealing device. 5 cl, 4 dwg
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