Ultrasonic piston converter

Details Ultrasonic piston converter Ultrasonic piston converter

B - Operations, Transporting

29

C

B29C 65/08 (2006.01) H04R 1/02 (2006.01)

Patent

CA 2199471

An ultrasonic transducer assembly (20) for hygienic ultrasonic sealing is disclosed. The assembly includes a hygienic ultrasonic sealing area and a non- hygienic area, separated by a barrier wall (88). The barrier wall has an opening which allows an ultrasonic converter (186) to move back and forth ("reciprocate") through the opening. The ultrasonic converter (186) is also vibrated at an ultrasonic frequency by machinery located in the non-hygienic area of the machine, and transmits those vibrations to the hygienic area of the machine. The converter has a null area (192) at which the converter is vibrated substantially minimally and other areas which are much more vigorously vibrated. A generally cylindrical a sealing surface (194) is fixed with respect to the null area of the transducer. The sealing surface is wiped by a wiping seal (202) mounted to the edge of the opening. These two parts may also be reversed.

Ensemble transducteur ultrasonore (20) pour un soudage par ultrasons hygiénique. L'ensemble comporte une zone de soudage par ultrasons hygiénique et une zone non hygiénique séparées par une paroi barrière (88). Cette paroi barrière présente une ouverture qui permet au convertisseur ultrasonore (186) de se déplacer en va-et-vient à travers celle-ci. De plus, un dispositif situé dans la zone non hygiénique de la machine fait vibrer ledit convertisseur ultrasonore (186), lequel envoie ces vibrations à la zone hygiénique de la machine. Le convertisseur présente une zone nulle (192) au niveau de laquelle il vibre sensiblement au minimum, et d'autres zones qui vibrent de manière nettement plus importante. Une surface de soudage (194) généralement cylindrique est fixe par rapport à la zone nulle du transducteur. Cette surface de soudage est essuyée par un joint essuyant (202) monté sur le bord de l'ouverture. Ces deux parties peuvent également être inversées.

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