A screen panel assembly , comprising: a screen panel ; and one or more raised screen components disposed on said screen panel , each of said one or more raised screen components comprising: an inclined screen surface that defines a first plane that is oriented at a first angle relative to said screen panel , and characterised in that said inclined screen surface has a front edge that is substantially perpendicular to a longitudinal axis of said screen panel , wherein said first plane is substantially perpendicular to a displacement vector along which said screen panel assembly is accelerated by a vibratory separation device; side panels ; and a frame adapted to support the inclined screen surface and the side panels , the frame having: a first edge that is aligned with a top surface of said screen panel ; and second edges , each of which extends upward from the top surface of the screen panel to a third edge , wherein the third edges angle upward to an upper point ; or second edges that angle upward to an upper point ; wherein the frame extends downward from the upper point to the screen panel to form a wedge surface that is positioned at a back side of said raised screen component , wherein said wedge surface is adapted to disrupt a flow path of a flow of a material mixture flowing in a longitudinal direction across said screen panel by redirecting said flow around opposing sides of said raised screen component . a screen panel ; and one or more raised screen components disposed on said screen panel , each of said one or more raised screen components comprising: an inclined screen surface that defines a first plane that is oriented at a first angle relative to said screen panel , and characterised in that said inclined screen surface has a front edge that is substantially perpendicular to a longitudinal axis of said screen panel , wherein said first plane is substantially perpendicular to a displacement vector along which said screen panel assembly is accelerated by a vibratory separation device; side panels ; and a frame adapted to support the inclined screen surface and the side panels , the frame having: a first edge that is aligned with a top surface of said screen panel ; and second edges , each of which extends upward from the top surface of the screen panel to a third edge , wherein the third edges angle upward to an upper point ; or second edges that angle upward to an upper point ; an inclined screen surface that defines a first plane that is oriented at a first angle relative to said screen panel , and characterised in that said inclined screen surface has a front edge that is substantially perpendicular to a longitudinal axis of said screen panel , wherein said first plane is substantially perpendicular to a displacement vector along which said screen panel assembly is accelerated by a vibratory separation device; side panels ; and a frame adapted to support the inclined screen surface and the side panels , the frame having: a first edge that is aligned with a top surface of said screen panel ; and second edges , each of which extends upward from the top surface of the screen panel to a third edge , wherein the third edges angle upward to an upper point ; or second edges that angle upward to an upper point ; a first edge that is aligned with a top surface of said screen panel ; and second edges , each of which extends upward from the top surface of the screen panel to a third edge , wherein the third edges angle upward to an upper point ; or second edges that angle upward to an upper point ; <EOS>