VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG UND ZUR ULTRASCHALLPRÜFUNG DER SCHWEISSREGION VON VERSIEGELTEN NAHRUNGSBEHÄLTERN

摘要

So as to check proper seal between a foil or lid and a container along a bond area (3) by means of a transmitter/receiver head (38) there is applied a beam of ultrasonic energy to such bond area (3) and reflected ultrasonic energy is evaluated so as to detect accuracy of such seal. In order to improve ultrasonic energy transmission to and from the bond area (3), a liquid (46) is provided between transmitter/receiver (38) and bond area (3).