Air filter cartridge

Patent metadata

Field	Value
Publication number	US-9446340-B2
Application number	US-200913123032-A
Country	US
Kind code	B2
Filing date	Nov 6, 2009
Priority date	Nov 7, 2008
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

Filters capable of dissipating static charges. One example includes a filter media pack comprising fluted media secured to facing media; the fluted media having cellulose fibers; and the fluted media including an amount of carbon black sufficient to impart a static charge dissipative property thereto. One example includes an air filter cartridge having a filter media pack comprising fluted media secured to facing media; the fluted media comprising cellulose fibers; the fluted media having at least one side coated with a static charge dissipative amount of a metallic coating. These filters are useable in, for example, dust collectors.

First claim

We claim:

1. An air filter cartridge comprising:
(a) filter media formed by dissipative material added into a resin and brought into contact with cellulose fibers, the filter media forming a filter media pack comprising fluted media secured to facing media;
(i) the dissipative material imparting a static charge dissipative property thereto, the dissipative material being evenly distributed throughout the filter media;
(ii) the filter media pack being constructed with an efficiency at least 60%, for 0.76 micron particles at a face velocity of 20 feet/min.;
(iii) the fluted media has a thickness of no more than 0.020 inches;
(iv) the filter media pack includes at least 70% cellulose fibers by weight; and
(v) the fluted media is provided with two sides each having a surface resistivity of less than 1×10 9 ohms/square.

2. An air filter cartridge according to claim 1 wherein:
(a) the dissipative material is carbon black.

3. An air filter cartridge according to claim 1 wherein:
(a) the fluted media comprises no more than 0.5%, by weight, electrically conductive fiber.

4. An air filter cartridge according to claim 1 wherein:
(a) the fluted media comprises no electrically conductive fiber.

Assignees

• Babcock Brian D
• Tate Heather M
• Belcher Mark D
• Zauner Brain
• Undesser Kyle W
• Wersal Douglas A
• Donaldson Co Inc

Inventors

• Babcock Brian D
• Tate Heather M
• Belcher Mark D
• Zauner Brain
• Undesser Kyle W
• Wersal Douglas A

Classifications

• B01D2201/50

  Means for dissipating electrostatic charges · CPC title

• B01D46/4209

  Prevention of static charge, e.g. by grounding · CPC title

• B01D46/525 Primary

  which comprises flutes · CPC title