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US 11,517,939 B1Granted
Woven wire screening and methods of forming the same
AssigneeFenner, Inc.
InventorBoyd Knepp
Life of this patent
Estimating the term…
Abstract
A self-cleaning woven wire screening or screen for classifying material. The screening includes a plurality interwoven warp and weft wires forming a plurality of openings in a screen section through which materials to be classified can pass through. The weft wires are preferably configured so that the high points or raised knuckles of the weft wires have a larger diameter, cross-sectional height or thickness than previously possible. Preferably, one or more of weft wires have a configuration that prolongs operational life of the screen or screening and obviates the need for protective encasement blocks (e.g., polyurethane encasement blocks) encasing the weft wires.
Claims17
A self-cleaning woven wire screening for use in classifying material;
- comprising:
- (a) a plurality of warp wires extending in a first direction;
- (b) a plurality of weft wires extending in a second direction, the second direction being substantially perpendicular to the first direction, said plurality of warp wires and said plurality of weft wires forming a woven screen section having a plurality of openings through which material to be classified can pass through;
- (c) said plurality of weft wires including a first group of weft wires and a second group of weft wires, each of said first group of weft wires and said second group of weft wires having two or more weft wires, said first group of weft wires being spaced from said second group of weft wires to allow relative movement between portions of said plurality of warp wires extending between said first group of weft wires and said second group of weft wires to prevent or reduce clogging of the plurality of openings of said woven screen section;
- and,
- (d) said plurality of weft wires having a first weft wire including a first portion and a second portion, said first portion of said first weft wire has a cross-sectional height less than a cross-sectional height of said second portion of said first weft wire, wherein said second portion of said first weft wire forms an uppermost portion of said first weft wire and said first portion of said first weft wire extends downwardly from said second portion of said first weft wire.
3 more elements
A self-cleaning woven wire screening for use in classifying material;
- comprising:
- (a) a plurality of warp wires extending in a first direction;
- (b) a plurality of weft wires extending in a second direction, the second direction being substantially perpendicular to the first direction, said plurality of warp wires and said plurality of weft wires forming a woven screen section having a plurality of openings through which material to be classified can pass through;
- (c) said plurality of weft wires including a first group of weft wires and a second group of weft wires, each of said first group of weft wires and said second group of weft wires having two or more weft wires, said first group of weft wires being spaced from said second group of weft wires to allow relative movement between portions of said plurality of warp wires extending between said first group of weft wires and said second group of weft wires to prevent or reduce clogging of the plurality of openings of said woven screen section;
- and,
- (d) said plurality of weft wires having a first weft wire including a first portion and a second portion, said first portion of said first weft wire has a cross-sectional height less than a cross-sectional height of said second portion of said first weft wire, wherein said first portion of said first weft wire is flattened such that said first portion of said first weft wire has a cross-sectional height 35% to 65% less than a cross-sectional height of said second portion of said first weft wire.
3 more elements
A self-cleaning woven wire screening for use in classifying material;
- comprising:
- (a) a plurality of warp wires extending in a first direction;
- (b) a plurality of weft wires extending in a second direction, the second direction being substantially perpendicular to the first direction, said plurality of warp wires and said plurality of weft wires forming a woven screen section having a plurality of openings through which material to be classified can pass through;
- (c) said plurality of weft wires including a first group of weft wires and a second group of weft wires, each of said first group of weft wires and said second group of weft wires having two or more weft wires, said first group of weft wires being spaced from said second group of weft wires to allow relative movement between portions of the plurality of warp wires extending between said first group of weft wires and said second group of weft wires to prevent or reduce clogging of the plurality of openings of said woven screen section;
- and,
- (d) said plurality of weft wires include a first weft wire having a first portion and a second portion, said first portion of said first weft wire is a flattened portion and said second portion of said first weft wire is a non-flattened portion such that said first portion of said first weft wire has a thickness less than a thickness of said second portion of said first weft wire, wherein said second portion of said first weft wire forms an uppermost portion of said first weft wire and said first portion of said first weft wire extends downwardly from said second portion of said first weft wire.
3 more elements
A self-cleaning woven wire screening for use in classifying material;
- comprising:
- (a) a plurality of warp wires extending in a first direction;
- (b) a plurality of weft wires extending in a second direction, the second direction being substantially perpendicular to the first direction, said plurality of warp wires and said plurality of weft wires form at least a portion of a woven screen section having a plurality of openings through which material to be classified can pass through;
- (c) said plurality of weft wires including a first group of weft wires having two or more weft wires, said first group of weft wires being spaced from an adjacent warp wire binding member to allow relative movement between portions of the plurality of warp wires extending between said first group of weft wires and said adjacent warp wire binding member to prevent or reduce clogging of the plurality of openings of said woven screen section;
- and,
- (c) said plurality of weft wires include a first weft wire having a first portion and a second portion, said first portion of said first weft wire having a substantially flat upper surface and said second portion of said first weft wire having an arcuate upper surface, wherein said second portion of said first weft wire forms an uppermost portion of said first weft wire.
3 more elements
Dependencies are inferred from the claim text.