SCREEN CYLINDER AND METHOD

摘要

A pulp screen cylinder (64) that includes screen media (66) releasably engaged with a frame (68) at spaced locations opposing movement of the media away form the frame during screening. A preferred frame includes a plurality of spaced engaging structures (103) that releasably engage screen media. A preferred frame includes an arrangement of flow windows (84) that are triangular or rhomboid. A preferred method includes producing a frame cylinder by centrifugal casting an machining flow windows using a jet cutting process. A preferred screen media has a plurality of spaced apart engaging structures (180) that each releasably engages the frame at spaced apart locations. A preferred screen media is of wedgewire construction having engaging structure carried by a plurality of spaced wire retaining clips (230). A preferred clip has vee-shaped rounded slots (316) and an arm (238) thicker than an end wall (236). A preferred engaging structure includes a projection that has hook (192) or lip (196) for releasable interlocking engagement.