Patent ID: 7850011

Claim:
A screen system suitable for use in a basket in a vibratory screen apparatus said basket having a clamping system said screen system comprising: a screen element disposed on a support frame, said support frame being provided with spaced apart first and second elongate frame elements including a support face and further elongate frame elements extending between said first and second frame elements for supporting a mesh panel of said screen element, wherein said mesh panel includes first and second elongate support members extending along opposite end portions of said mesh panel, said first and second support members including a clamping force receiving face and a frame element engaging face, said first and second support members being formed and arranged for secure interengagement with said first and second frame elements with at least one of said first and second support members and said support face being formed and arranged so that when said at least one first and second support member is clamped to said support face of the respective one of said first and second frame elements by said clamping system, said at least one first and second support member is subjected to a force component substantially in the principal plane of said mesh panel, so that said mesh panel is securely held under tension against said further frame elements and said respective one of said first and second frame elements is clamped together with said at least one first and second support member in the basket; wherein at least one of said first and second elongate support members, for interengagement with said first and second frame elements, has a cam portion formed and arranged for interaction with the respective frame element, so that when a clamping force (C) is applied by said clamping system to a clamp force receiving face of said at least one of said first and second support members, in use of the screen system, to clamp said support members onto the respective one of said first and second frame elements, a said at least one support member is rotated relative to said frame element, so as to tension the screen element so that the mesh panel is securely held under tension against said further frame elements; wherein said clamping system comprises a collapsible tube and wherein the further frame elements include convexly arcuate support surfaces forming a crown deck.