A method for reducing adhesive build-up on ultrasonic bonding surfaces of ultrasonic bonding systems is disclosed. The opening indicated value IACV to be supplied to the motor during a fast idle operation is a value obtained by adding the water temperature correction value and the atmospheric pressure correction value to the totally closed reference value. Alternatively or in addition, it is provided that a pressure load on the outside door handle is detected for locking the assigned motor vehicle door lock. The camera rigs obtain video images of a patient lying on the mechanical couch the computer processes these images to generate a three-dimensional model of the surface of the patient which is utilized to position the patient relative to the treatment apparatus. The ink tank is capable of introducing ink through an ink inlet by negative pressure introduced in the ink tank through a common suction port. The rugged part andor light-scattering pattern prevents obscure rays in the overlapped portion and improves a uniformity of luminance of the backlight unit.