A disposable undergarment that includes an elastically stretchable base sheet having transversely opposite side edge portions intended to define leg-holes. The measurement sensing element is formed by a piezoelectric layer. The delivery apparatus is arranged to deliver at least part of the colorant from the colorant support onto a printing medium or a transfer means. A control module generates the recharge control signal and the output control signal, based on the monitor signal. This insures that the retaining element will not be inadvertently unclamped from the channel. The circuit configuration has two individual driver circuits and a generating circuit in order to feed a first drive signal to the first gate electrode and a second drive signal to the second gate electrode, the second drive signal being delayed with respect to the first drive signal.