Patent application number | Description | Published |
20080217241 | COMPOSITE FILTER MEDIA AND METHODS OF MANUFACTURE - A composite filter media structure is provided. In an exemplary embodiment, the composite filter media structure includes a corrugated base substrate that includes a nonwoven synthetic fabric formed by a dry-laid process that corrugates the base substrate during the forming process. The composite filter media structure also includes a nanofiber membrane deposited on at least one side of the base substrate by an electro-blown spinning process. | 09-11-2008 |
20080272048 | Filter cartridge media retention system - A filter cartridge comprises a pleat pack including filtration media for removing particulates from a particulate laden fluid stream moving in a first direction through the filtration media. The pleat pack is formed into a tubular configuration with a plurality of circumferentially spaced pleats. The filtration media is periodically subject to a cleaning fluid stream moving in a second direction opposite to the first direction. Potting material is at axially opposite end portions of the pleat pack to maintain the filtration media in the tubular configuration. A support tube is located on a first side of the pleat pack downstream of the filtration media in the first direction of fluid flow. A retention device limits movement of a portion of the filtration media when subjected to the periodic cleaning fluid stream. The retention device comprises a metal band and located on a second side of the filtration media opposite the first side. A rod is disposed in the potting material of at least one of the axial end portions of the pleat pack. The rod is fixed to the metal band to maintain the metal band in an axial position along the filtration media. | 11-06-2008 |
20080314011 | FILTER ELEMENT INCLUDING A COMPOSITE FILTER MEDIA - A filter element includes, in an exemplary embodiment, a first end cap, a second end cap, and a composite filter media structure. The composite filter media structure includes a base substrate that includes a nonwoven synthetic fabric formed from a plurality of bicomponent synthetic fibers with a spunbond process, and having a bond area pattern having a plurality of substantially parallel discontinuous lines of bond area. The base substrate having a minimum filtration efficiency of about 50%, measured in accordance with ASHRAE 52.2-1999 test procedure. The composite filter media structure also includes a nanofiber layer deposited on one side of the base substrate by an by electro-blown spinning process. The composite filter media structure having a minimum filtration efficiency of about 75%, measured in accordance with ASHRAE 52.2-1999 test procedure. The composite media structure further includes a plurality of corrugations formed at a temperature of about 90° C. to about 140° C. | 12-25-2008 |
20100126130 | FILTER ELEMENT WITH HIGH TEMPERATURE POLYMER RETAINING STRAPS AND METHOD OF MANUFACTURE - A filter element for removing particles from a particulate laden fluid stream includes, in an exemplary embodiment, a filtration media formed into a tubular configuration and that a plurality of circumferentially spaced apart pleats. The filter element also includes at least one melt-extruded retention strap extending circumferentially around the filtration media to limit radial movement of the filtration media at operating temperatures up to about 500° F. Each melt-extruded retention strap is formed from a melt extrudable amorphous thermoplastic polyimide. | 05-27-2010 |
20110252757 | HELICAL STRAPPING METHOD FOR HIGH TEMP PLEATED FILTERS - A filter cartridge that includes a filter media. The media is pleated and the pleats are arranged into a tube about an axis with a first pleat proximate a last pleat. The filter cartridge includes a strap that has first and second end portions and that extends at least one revolution around the pleated media tube in a helix such that the first and second end portions of the strap are axially displaced from each other. The first and last pleats of the media are attached to each other and the first and second end portions of the strap are attached to the media. The filter cartridge may be made by an associated method. In one specific example, a stitching attaches the strap to the media. | 10-20-2011 |
20120012518 | CORELESS FILTER CARTRIDGE AND METHOD OF FORMING A CORELESS FILTER CARTRIDGE - A coreless filter cartridge includes a filtration media having a plurality of pleats formed in a tubular configuration. The filtration media includes a first end that extends to a second end through an intermediate portion having an exterior surface and an interior surface that defines a hollow core. At least one retention device is adhered to the exterior surface of the filtration media. The at least one retention device is configured and disposed to limit radial movement of the filtration media. The filter cartridge is devoid of an internal core support provided within the hollow core thereby establishing a coreless filter cartridge. | 01-19-2012 |
20120324845 | FILTER ASSEMBLY FOR USE IN A BAGHOUSE - A filtration system is provided. The filtration system includes a flexible attachment portion, the attachment portion configured to couple the bag filter to a tube sheet, an adapter ring attached to the attachment portion, and a bag filter attached to the adapter ring. | 12-27-2012 |
20130042585 | FILTER CORE FOR USE WITH PLEATED FILTER CARTRIDGES - A filter core includes a tubular body that has a first end and a second end. The tubular body includes a plurality of surface features spaced longitudinally along the tubular body between the first and second ends. Each of the surface features includes a first portion for flow area and a second portion for bridging across an opening for strength. | 02-21-2013 |