US 6,426,003 B2 · Screening device and method of manufacture

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.

Claims8

Dependent claims

A screening device comprising:

a plurality of filter wires each comprising a first section and a second section opposite said first section, said second section having a base portion;
at least one longitudinal substantially U-shaped support bar having an upstream portion and a downstream portion defining first and second side surfaces, respectively, a plurality of slots in said first side surface, and a cavity machined in said second side surface in open communication with said slots, said cavity having a substantially flat end surface, and a pair of side surfaces, wherein a thickness of said side surfaces is less than a thickness of said upstream portion;
and
said second sections of said filter wires received by said slots so that said base portions extend through said slots into said cavity, and said wires are supported by said at least one support bar so that said wires are substantially parallel to each other and define screening openings therebetween adjacent said first sections thereof;
and
wherein said wires are fixed to said at least one support bar by local deformation of said base portions in said cavities into engagement with said substantially flat end surface.

3 more elements

Dependencies are inferred from the claim text.

Screening device and method of manufacture

Life of this patent

Screening device and method of manufacture

Life of this patent

Abstract

Claims8