A seal mechanism for a transverse crop conveying auger in a header that incorporates a flexible-sealant-filled labyrinth at each end of a tube-like auger central core that allows rotation of the auger without allowing entry of dirt, debris, or other contaminants into the bearing housing area positioned inside of the tube-like central core of the auger. The controller has a circuit with a time-based signal source that triggers conduction independently of line voltage magnitude and a transistor switch whose gate receives signals from the time-based signal source to trigger the circuit. Each tissue anchor is coupled with a respective one of the first and second suspending members, wherein a distance between the suburethral support and the second anchor is adjustable. Finally, by preferably employing an impellor type water pump, the expense of an electric water pump and its associated control circuitry can be avoided. The disclosure further relates to methods of forming collecting bodies and electrodes for bipolar cells using an inkjet printing method. Even when the work unit receives a large external force in the lateral direction, swing of the work unit can thereby be restricted to within the predetermined angle.