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US 2012/0067015 A1Published application
Expanded metal filters
AssigneeACS Industries, Inc.
InventorsGeorge Greenwood, Michael McCarthy, Scott J. MacKenzie, Richard Pfefferle
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AssigneeACS Industries, Inc.
InventorsGeorge Greenwood, Michael McCarthy, Scott J. MacKenzie, Richard Pfefferle
Estimating the term…
Expanded metal sheets (5) are used to produce tubular filters (13). The expanded metal sheet (5) has a multiplicity of rows of openings arranged to reduce nesting when the sheet (5) is rolled on itself. In particular, the pitch between the rows of openings, the sizes of the openings, or both the pitch between the rows of openings and the sizes of the openings are varied to reduce nesting when the expanded metal sheet (5) is rolled on itself. The filters (13) can include external circumferential grooves (3), rounded corners (19) produced by a point loading process, textured surfaces (37) between openings, and/or torturous internal paths produced by non-perforated areas of an expanded metal sheet. The expanded metal sheet (5) can be composed of carbon steel coated with a material having a higher heat conductivity, e.g., tin.
A tubular filter comprising expanded metal that has been rolled on itself to form a multi-layered tube wherein the expanded metal comprises a multiplicity of openings and includes at least one section that is free of openings, said section producing circumferential flow of gas within the filter.
A tubular filter comprising expanded metal that has been rolled on itself to form a multi-layered tube having a substantially cylindrical outer surface wherein the expanded metal comprises a multiplicity of openings and the substantially cylindrical outer surface comprises a circumferential groove.
A tubular filter comprising expanded metal that has been rolled on itself to form a multi-layered tube having a central bore, a substantially cylindrical outer surface, and substantially flat end sections which extend between the central bore and the substantially cylindrical outer surface, wherein the expanded metal comprises a multiplicity of openings and the corners formed by the intersections between the substantially cylindrical outer surface and the substantially flat end sections have been rounded by a point loading process.
A tubular filter comprising expanded metal that has been rolled on itself to form a multi-layered tube wherein the expanded metal comprises a multiplicity of openings and the surface of the expanded metal between at least some of the openings is texturized so as to reduce laminar flow of gas over the surface.
A tubular filter comprising expanded metal that has been rolled on itself to form a multi-layered tube wherein the expanded metal comprises a multiplicity of openings and the expanded metal comprises a first metal at least one surface of which is coated with a second metal whose thermal conductivity is at least 25% greater than that of the first metal.
An expanded metal sheet comprising a multiplicity of rows of openings wherein the spacing between adjacent rows is not constant and wherein the metal is corrosion resistant.
An expanded metal sheet comprising a multiplicity of rows of openings wherein the spacing between adjacent rows is not constant and wherein a) the sheet is plated with another metal prior to expanding and b) the plating is catalytic.
Dependencies are inferred from the claim text.