Patent attributes
The present welding device is a device for welding webs W, the device including: a drum 20 and an anvil 21 rotating about an axis; a transfer section 22 provided on a periphery of the drum 20 to rotate together with the drum 20; a horn 11 which, together with the anvil 21, applies a vibration energy to a layered portion of the webs; a cutter 30 which comes into contact with the anvil 21 to cut the webs; a sensor 40 for measuring a distance between the anvil 21 and the horn 11; and a control section for controlling a relative positions of the anvil 21 and the horn 11 based on the measured distance between the anvil 21 and the horn 11 as measured by the sensor. While the horn 11, together with the anvil 21, applies the violation energy to the webs W, the cutting of the webs W by the cutter 30 is not performed.
