A steering column locking mechanism. A feature of an embodiment resides in that, a second junction portion formed in a suspension lead is fitted into a first junction portion formed in a chip mounting portion, thereby to physically fix the chip mounting portion and the suspension lead. The cleaner utilizes a pair of counter rotating, textured rollers that are positioned between the idlers, with one roller positioned on each side of the web in close proximity therewith and each roller rotates in an opposite direction to that of the webs flowpath. The medium comprises a plurality of substrate surfaces stacked along the vertical length of at least one conduit.