FILTER CARTRIDGE WITH CENTERBOARD, DUST COLLECTORS, AND METHODS

• US 20110078985A1
• Filed: 09/21/2010
• Published: 04/07/2011
• Est. Priority Date: 10/02/2009
• Status: Active Grant

• Current Assignee: Donaldson Company Incorporated
• Original Assignee: Donaldson Company Incorporated
• Inventors: Belcher, Mark, Kalis, Matthew A.
• Granted Patent: US 8,361,182 B2
• Time in Patent Office: Days
• US Class Current: 55/302
• CPC Class Codes: B01D 2265/06 Details of supporting structures for filtering material, e.g. cores
• CPC Class Codes: B01D 2271/02 Gaskets, sealings
• CPC Class Codes: B01D 46/0002 Casings; Housings; Frame constructions
• CPC Class Codes: B01D 46/0005 Mounting of filtering elements within casings, housings or frames B01D46/2422 takes precedence
• CPC Class Codes: B01D 46/525 which comprises flutes
• CPC Class Codes: B01D 46/71 with pressurised gas, e.g. pulsed air
• CPC Class Codes: B32B 37/18 involving the assembly of discrete sheets or panels only
• CPC Class Codes: B32B 38/0012 Mechanical treatment, e.g. roughening, deforming, stretching
• CPC Class Codes: Y10T 156/1002 with permanent bending or reshaping or surface deformation of self sustaining lamina
• CPC Class Codes: Y10T 156/1069 Bonding face to face of laminae cut from single sheet
• CPC Class Codes: Y10T 156/1097 Lamina is running length web
• CPC Class Codes: Y10T 156/1798 with liquid adhesive or adhesive activator applying means

Abstract

An air filter cartridge is provided including an air filter media construction having a first, outlet end, flow face and an opposite, second, inlet end, flow face. The filter media construction comprises fluted media secured to a facing media sheet. The filter media is closed to flow of unfiltered air completely therethrough. A centerboard is provided. The centerboard has a media portion embedded within the media construction. The centerboard has first and second opposite sides. The media portion that is embedded within the media defines an aperture arrangement extending completely through the centerboard from the first side to the second side. An adhering sealant secures the centerboard to the media construction. At least some adhering sealant extends through the aperture arrangement.

Claims

1. An air filter cartridge comprising:

(a) air filter media construction having a first, outlet end, flow face and an opposite, second, inlet end, flow face;

(i) the filter media construction comprising fluted media secured to a facing media sheet;

(ii) the filter media being closed to flow of unfiltered air completely therethrough; and

(b) a centerboard having a media portion embedded within the media construction;

the centerboard having first and second opposite sides;

(i) the media portion that is embedded within the media defining an aperture arrangement extending completely through the centerboard from the first side to the second side; and

(ii) an adhering sealant securing the centerboard to the media construction;

(A) at least some adhering sealant extending through the aperture arrangement.

2. An air filter cartridge according to claim 1 wherein:

(a) the aperture arrangement includes a plurality of apertures extending completely through the centerboard.

3. An air filter cartridge according to claim 2 wherein:

(a) the plurality of apertures are shaped and spaced relative to each other and relative to the fluted media to ensure each flute that is against the centerboard extends across at least one aperture with adhering sealant.

4. An air filter cartridge according to claim 2 wherein:

(a) the plurality of apertures are non-rectangular.

5. An air filter cartridge according to claim 2 wherein:

(a) the centerboard includes a bottom edge and first and second side edges generally perpendicular to the bottom edge; and

(b) the plurality of apertures includes at least 2 edges that are not parallel to either the bottom edge or to the first and second side edges.

6. An air filter cartridge according to claim 2 wherein:

(a) at least some of the plurality of apertures are trapezoidal.

7. An air filter cartridge according to claim 5 wherein:

(a) the centerboard includes a top edge extending between the first and second side edges and at an opposite end of the centerboard from the bottom edge; and

(b) the first and second side edges each defining a cut-out adjacent to the plurality of apertures.

8. An air filter cartridge according to claim 7 wherein:

(a) each of the cut-outs and the plurality of apertures is adjacent to the top edge.

9. An air filter cartridge according to claim 7 wherein:

(a) the centerboard includes a handle portion extending outside of the media construction;

part of the top edge being along the handle portion;

(i) the handle portion defining an grasping segment sized to accommodate at least a part of a human hand.

10. An air filter cartridge according to claim 1 wherein:

(a) the fluted media has a plurality of flutes;

each of the flutes having a first end positioned adjacent to the first flow face and a second end positioned adjacent to the second flow face;

(i) a first set of selected ones of the flutes being open at the first end and closed at the second end; and

(ii) a second set of selected ones of said flutes being closed at the first end and open at the second end.

11. An air filter cartridge according to claim 1 wherein:

(a) the filter media is coiled around the media portion of the centerboard.

12. An air filter cartridge according to claim 1 further including:

(a) a gasket arrangement secured to the filter media construction.

13. An air filter cartridge according to claim 1 wherein:

(a) the adhering sealant comprises at least one of hot melt, urethane, glue, or adhesive.

14. A dust collector comprising:

(a) a housing having a dirty air inlet, a clean air outlet, a tubesheet, and a frame arrangement;

(i) the tubesheet separating the housing between an unfiltered air plenum and a filtered air plenum;

the tubesheet having an aperture and a sealing surface;

(b) a first air filter cartridge operably installed in the aperture of the tubesheet;

the first air filter cartridge including air filter media construction having a first, outlet end, flow face and an opposite, second, inlet end, flow face;

(i) the filter media construction comprising fluted media secured to a facing media sheet;

(ii) the filter media being closed to flow of unfiltered air completely therethrough;

(iii) a centerboard having a media portion embedded within the media construction;

the centerboard having first and second opposite sides;

(iv) the media portion that is embedded within the media defining an aperture arrangement extending completely through the centerboard from the first side to the second side; and

(v) an adhering sealant securing the centerboard to the media construction;

(A) at least some adhering sealant extending through the aperture arrangement; and

(vi) a gasket arrangement secured to the filter media construction compressed against the tubesheet sealing surface.

15. A dust collector according to claim 14 further comprising:

(a) a reverse-pulse cleaning system constructed and arranged to periodically emit a pulse of gas at the outlet end flow face.

16. A dust collector according to claim 14 wherein:

(a) the aperture arrangement in the centerboard is shaped and spaced relative to the fluted media to ensure each flute extends across at least one aperture with adhering sealant.

17. A method of making an air filter cartridge;

the method comprising;

(a) providing a centerboard including a media portion and having first and second opposite sides;

(i) the media portion defining an aperture arrangement extending completely through the centerboard from the first side to the second side;

(b) coiling z-media around the media portion of the centerboard; and

(c) while coiling, securing the z-media and the centerboard together by using an adhering sealant that extends through the aperture arrangement of the centerboard.

18. A method according to claim 17 wherein:

(a) the z-media includes fluted media; and

(b) the step of securing the z-media includes having each flute that is against the centerboard also extends across the aperture arrangement and is in contact with adhering sealant in the aperture arrangement.