Screening device, such as a screen cylinder, and method of manufacture of the screening device
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United States of America Patent
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Mar 13, 2007
Grant Date -
Jun 17, 2004
app pub date -
Sep 3, 2003
filing date -
Oct 3, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
A screening device (e.g., screen plate or screen cylinder) is manufactured relatively inexpensively and easily yet has uniform screening openings (e.g., screening slots) even when of a width of less than 0.5 mm. A plurality of wires having first and second sections (the second sections having base portions and of smaller cross-section than the first sections) are mounted substantially parallel to each other, supported by at least one support bar or ring. The bars or rings have slots formed in a first side surface, and a cavity in open communication with the slots in a second side surface. The wires are fixed to the bars or rings by deforming the wires (e.g., by bending a flap, engagement by a reciprocating tool, welding, etc.) within the cavity, or by deformation of the support bar or ring in the cavity. The screen plate or cylinder is preferably used to screen or otherwise treat a cellulose pulp suspension, e.g., by subjecting the first sections of the wires to a flow of pulp with accepts passing through the screening openings.
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