SEALING DEVICE AND METHOD FOR SEALING FITTING ELEMENTS ONTO WORKPIECES USING ULTRASOUND

A sealing device for sealing equipment elements to workpieces, in particular in the form of a composite laminate, by means of ultrasound, with a sonotrode for generating an ultrasound, with a sealing surface for transmitting the ultrasound to the equipment element and/or the workpiece, with an anvil opposite the sonotrode and with an adjusting device for adjusting the sonotrode. The anvil relative to one another from an open position for at least partial inserting of the equipment element. The workpiece into a sealing gap between the sonotrode and the anvil into a closed position for at least partially pressing the workpiece. The equipment element between the sealing surface of the sonotrode and the anvil during ultrasonic sealing and back. In order to prevent damage and leakiness in workpieces such as packaging laminates, for example in the area of crease lines, by sealing equipment elements such as spouts to the workpieces or the packaging laminates by means of ultrasound, it is provided that at least one pair of mutually corresponding clamping means vibration-decoupled from the sealing surface is provided on opposite sides of the sealing gap for clamping the workpiece in the closed position. At least one pair of clamping means are provided outside the sealing surface as viewed in a direction along the sealing gap relative to the equipment element.