A vertical installation structure includes a plurality of placing stages on each of which information processing apparatuses are to be installed, and supporting members for supporting the plurality of placing stages so that the plurality of placing stages are vertically arranged. The mixing chamber includes a piezoelectric component for mechanical actuation of fluid motion within or adjacent the mixing chamber. The apparatus includes a driven biasing member that is linked to at least one of the first and second platens that form the press and a tensioner linked to the biasing member.