Patent ID: 9206514
Filing Date: 2015-12-08
Classification: C23F,H05K

Abstract:
1. An apparatus for the liquid treatment of sheet material passing through the apparatus, the apparatus comprising: upper path defining plate and lower path defining plate, the plates being separated by a gap between opposed faces of the plates to provide a treatment zone, the gap and the plates having: the gap having edge closures of the gap, wherein the edge closures of the gap[s] are at least substantially along the length of the sheet path within the plates and delimiting the width of the gap, the edge closures of the gap being: means for transporting a sheet to and from the gap, in the transport direction giving sense to the terms up- and down-stream as used herein, and including: means for injecting treatment liquid to the gap intermediate its up- and down-stream ends for flow in the gap both up- and down-stream of the transport direction and including: wherein the treatment zone in the gap between the plates has: an up-stream portion up-stream of the nozzle means and a down-stream portion down-stream of the nozzle means, wherein the treatment apparatus includes: rounded edges of the upper plate at its respective up- and down-stream ends, the rounding of the ends providing a smooth flow contour for liquid onto the top of the upper plate at its ends in the presence of sheet material between both the plates and either of the in-feed or out-feed rollers, the sheet material damming flow of liquid on top of the sheet material from passing between the lower roller and the lower plate; and a flow path from the top of the upper plate to a drain at edges of the plates.