is then offset from the roll 39 s radial axis by 5 degrees or more 21 fig3 b so as to further improve impact reception by the fabric on a cylindrical support an illustration of the jet stream pattern formed by this type of array is shown in fig1 jet streams emanating from the jet vanes 16 impact the fabric at points equi distant from each other longitudinally 17 but diagonally to the filling yarns due to the bias angle offset of the manifold to the roll 20 and the oblique angle of the multi vane strip 6 fig1 offset angles in excess of 20 degrees inhibit enhancement by geometrically placing the manifold in a position which is either in too close proximity to the fabric surface or in a position which is too far removed if the manifold is in too close deflected water will be entrapped whereas if the manifold is positioned too far away from the fabric surface a concomitant decrease in energy transfer will result a preferred embodiment of this invention provides for utilizing a multiple row low density oblique vaned jet strip 6 fig7 in the form of a series of vanes of jets impinging the fabric which is to be treated on a biased angle of at least 5 degrees fig3 b in this embodiment the support screen is a fine mesh which is pervious.