Patent ID: 7367264

Claim:
An apparatus for treating a surface area of an individual sheet of substrate, said substrate having a selected transverse thickness, with a predetermined material comprising: a vacuum roller, said vacuum roller including a supporting shaft and a rotatable sleeve member, at least a portion of said sleeve member being circumjacent to said supporting shaft, said rotatable sleeve member including a plurality of perforations arranged in a predetermined pattern, said supporting shaft further including at least a pair of radially extending, circumferentially spaced barrier members providing a first chamber therebetween, said barrier members extending longitudinally of said predetermined perforation pattern; a transfer roller adapted for treating said surface area, said transfer roller and said vacuum roller cooperating to form a nip therebetween such that a spacing between said transfer roller and said vacuum roller at said nip has a preselected thickness less than the selected transverse thickness of said substrate; a source of reduced pressure, said source of reduced pressure communicating with said first chamber.