A finger sweep for use with mail parcel handling systems includes an elongate mounting member for coupling the finger sweep to a drive shaft, and a parcel engaging member disposed on a distal end of the mounting member. The dosage form can be prepared using simple, inexpensive tablet compression techniques. The flash vessel has a conical bottom in which a minimum level of polymer is maintained for a dynamic seal between the inlet and outlet. Two heat pipes connect the base and the two heat sinks. The semiconductor integrated circuit has a mode for changing a value of the second power supply voltage to a value which is different from a value of the first power supply voltage.