US 10,029,281 B2Granted

Wire screenings and a method of forming the same

AssigneeLumsden Corporation

InventorsBoyd E. Knepp, Myron Henry Wardell, Jeffery L. Beck

Life of this patent

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Abstract

A wire screening for classifying material. The screening may include a plurality of interwoven warp and weft wires where the weft wires are individually coated with a coating that expands and collapses to enhance performance and longevity of the screen. The coating of one or more weft wires may differ in at least one characteristic from the coating of one or more other weft wires. The warp wires can be individually coated to enhance performance and/or longevity of the screening. Binding blocks can be used in place of weft wires. The coating of one or more warp wires may differ in at least one characteristic from the coating of one or more other warp wires and/or one or more weft wires. The screening can include a plurality of uncoated weft and warp wires where the crimp depth of each wire forming each opening has a different crimp depth.

Claims26

Dependent claims

A woven wire screening for use in classifying material flowing through said woven wire screening;

said woven wire screening comprising:
(a) a set of warp wires, each warp wire in said set of warp wires extending parallel to all other warp wires in said set of warp wires, at least two warp wires in said set of warp wires being crimped wires;
(b) a first set of crimped weft wires extending perpendicular to said set of warp wires and a second set of crimped weft wires extending perpendicular to said set of warp wires, said set of warp wires, said first set of crimped weft wires and said second set of crimped weft wires being interwoven to form an integral wire cloth having a plurality of openings for permitting material to be classified to flow through said openings, said first and second sets of crimped weft wires each including at least three crimped weft wires, one of said crimped weft wires in said first set of crimped weft wires being spaced from an adjacent crimped weft wire in said first set of crimped weft wires a first distance and said first set of crimped weft wires being spaced from said second set of crimped weft wires a second distance wherein said second distance is greater than said first distance and no weft wires are positioned between said first set of crimped weft wires and said second set of crimped weft wires;
and
(c) at least three individual protective coatings wherein each individual protective coating of said at least three individual protective coatings coats only one of said at least three crimped weft wires in said first set of crimped weft wires such that each of said at least three crimped weft wires in said first set of crimped weft wires has a separate coating from each of the other of said at least three crimped weft wires in said first set of crimped weft wires, each of said at least three individual protective coatings being formed from a non-metallic material.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/886,186Filed 19 Oct 2015 · continuation in part
Priority: 19 Jul 2013
Published: US 2016/0038977 A111 Feb 2016
Granted: 24 Jul 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

B07B 1/4672
Constructional details of screening surfaces or meshes: woven meshes
B07B 1/4618
Constructional details of screening surfaces or meshes: manufacturing of screening surfaces
B21F 27/02
Making wire network, i.e. wire nets: without additional connecting elements or material at crossings, e.g. connected by knitting
B21F 27/18
Making special types or portions of network by methods or means specially adapted therefor: of meshed work for filters or sieves

Family

Application13/946,207Parent of this continuation-in-part · filed 19 Jul 2013
US 2016/0038977 A1Pre-grant publication · published 11 Feb 2016
US 9,486,837 B2Parent of this continuation-in-part
US 2015/0021240 A1Published application
US 10,029,281 B2This patent

From the US filing history. Foreign family members aren’t listed.