D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
D21D 5/16 (2006.01) B01D 29/01 (2006.01) B01D 29/11 (2006.01) B21K 1/76 (2006.01) B23P 15/00 (2006.01) B26F 1/26 (2006.01)
Patent
CA 2120250
2120250 9307334 PCTABS00021 The present invention relates to a method of manufacturing a screen product and to a screen product manufactured according to the method. In particular the invention relates to the manufacture of a screen or a filter plate or a cylinder by a new machining method by which a product is received the flow properties of which are substantially better than the ones of the prior art devices. It is characteristic of the invention that an aperture having curved wall surfaces is machined in one work phase in the plate in the depth direction preferably by waterjet cutting. It is characteristic of the screen product of the invention that the screening aperture is progressively widening in the direction of the flow through the plate, and preferably inclined under the ridge adjacent the groove in a PROFILETM plate.
Aaltonen Frank
Alajaaski Timo
Advanced Fiber Technologies (aft) Oy
Gowling Lafleur Henderson Llp
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