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Filter cartridge having central plenum and housing sidewall

A technology of shell side walls and air chambers, which is applied in the direction of breathing filters, breathing masks, filter separation, etc., can solve the problems of limited service life of filter cartridges, no limit on the side walls of filter cartridge shells, etc., and achieve the realization of Service life, realization of assembly operations, effect of increasing volume

Inactive Publication Date: 2013-01-16
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although dual-path or dual-flow filter cartridges (comprising two spacer layers of filter media separated by a central plenum), see U.S. Patent Re 35,062 to Brostrom et al. shell side wall
As a result, dual airflow filter cartridges typically already include a lower volume of filter media, thereby limiting cartridge life

Method used

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  • Filter cartridge having central plenum and housing sidewall
  • Filter cartridge having central plenum and housing sidewall
  • Filter cartridge having central plenum and housing sidewall

Examples

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example 1

[0055] Carbon-loaded BMF webs were prepared according to US Patent Application No. 2006 / 096911. Utilizes Vistamaxx made by ExxonMobil TM 2125 resin to prepare polymer fibers.

[0056] The bulk carbon-filled web was compressed to a thickness of approximately 4.7 mm using a Carver heated platen press with a 12 inch by 12 inch platen. The platen temperature was 200°F. The pressure totaled 3000 pounds per square inch (psi) and the pressing time was 5 seconds.

[0057] In the following description, OV means organic vapor, and gsm means grams per square meter. The stacked volume layers and refinement layers have the configuration shown in Table 1.

[0058] Table 1

[0059]

[0060] Assemble the filter in the following sequence:

[0061] OV stacked volume layer

[0062] OV stacked volume layer

[0063] OV refinement layer

[0064] Inflatable chamber structure

[0065] OV refinement layer

[0066] OV stacked volume layer

[0067] OV stacked volume layer

[0068] The...

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PUM

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Abstract

A filter cartridge (12) that has a first and second layer of filter media (38, 40) that each have first and second major surfaces (32, 44) and a perimeter (46) and that each contain active particulate that is bonded together. A plenum (42) is disposed between the first and second layers of filter media (38, 40) such that the plenum (42) interfaces with the second major surface (44, 44') of each layer of filter media. A housing sidewall (30) extends from the first layer of filter media (38) to the second layer of filter media (40) and is secured to the perimeter (46) of the first and second layers of filter media. The first major surfaces (32, 32') of the first and second layers of filter media (38, 40) are each fluid permeable and are each in fluid communication with an exterior gas space. A filter cartridge (12) having such a construction provides a bifurcated flow pattern in a higher volume structure.

Description

[0001] The present invention relates to filter cartridges having a central plenum joined to housing sidewalls. The housing sidewalls frame the filter cartridge and may be made of rolled material adhered to the perimeter of a layer of filter media disposed on opposite sides of the central plenum. The cartridge is suitable for use in respirators that provide clean filtered air to the wearer. Background technique [0002] Respirators are devices that protect workers and other persons from adverse health effects associated with airborne hazards. Such devices are worn around the face for the removal of unwanted contaminants from a source of breathing air. Contaminants can be solid particles (eg, soot, bioaerosols, or other particles), or they can be gases or vapors, or combinations of these substances. [0003] Respirators come in many shapes and forms and are generally designed according to the protective needs of the wearer. Respiratory products range from simple filtering mas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62B23/00A62B7/10A62B18/02B01D39/00
CPCB01D39/2062B01D39/163A62B7/10A62B23/02B01D2239/086B01D2239/10B01D2239/065A62B19/00A62B18/02A62B23/00B01D39/00
Inventor 皮埃尔·勒加雷布里顿·G·比林斯利
Owner 3M INNOVATIVE PROPERTIES CO
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