An apparatus for molding a tire includes a first mold section having a first cavity, with an annular ridge disposed thereon. A comb drive device in accordance with an illustrative embodiment of the present invention can include a number of interdigitated comb fingers some of which have a reduced thickness along at least a portion of their length relative to other comb fingers. In addition the client is permitted to access the network storage devices separate from the virtualized network storage system for other purposes such as reporting, verifying or backing up. Leakage of buffer gas from the seals enters the bearing chambers and reservoirs, and is released from them at flow rates to control the bearing chamber pressures. The drive unit includes a cam for engaging a portion of the container to actuate the valve stem.