Screen and method of manufacture

Details Screen and method of manufacture Screen and method of manufacture

D - Textiles, Paper

21

D

209/118, 260/160

D21D 5/16 (2006.01) B01D 29/11 (2006.01)

Patent

CA 1336279

A plurality of blind openings (e.g. holes or slots) are formed through a first face of a homogeneous metal plate and extend a predetermined distance short of the opposite face. Larger size openings are formed through the first face using the blind openings as pilot openings. The larger size openings extend into the plate short of the terminations of the blind openings. Parallel grooves are then machined in the opposite face of the plate to a depth to reach and thus uncover the terminations of the blind openings in the plate thereby providing passages through the plate. Ridges or bars are thus made between adjacent grooves. The sides of each ridge form each one side of one of the two adjacent grooves. The sides are can be generally at right angles to the plate or may be at an inclination to same A screen cylinder made from a plate according to the invention has an increased effective screening area compared to prior art screens of a similar type.

612049

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