Apparatus for folding and sealing a sheet having pressure sensitive adhesive positioned thereon

摘要

An apparatus for folding and sealing a sheet having a pressure sensitive adhesive positioned thereon is disclosed. The apparatus includes a first roller and a second roller. The second roller has a roller surface, and a plurality of independent sealing protrusions extending from the roller surface. The sealing protrusions are positioned in operative contact with the first roller during advancement of the sheet between the first roller and the second roller. The apparatus yet further includes a third roller. The sealing protrusions of the second roller are positioned in operative contact with the third roller during advancement of the sheet between the second roller and the third roller. The sealing protrusions extend from the roller surface at locations such that advancement of the sheet between the second roller and the third roller causes the sealing protrusions to operatively contact the adhesive.