Box-V filter and method of fabricating the same

• US 7,931,726 B2
• Filed: 03/01/2006
• Issued: 04/26/2011
• Est. Priority Date: 03/01/2006
• Status: Active Grant

• Current Assignee: Camfil AB
• Original Assignee: Camfil AB
• Inventors: Sundvik, Anders Martin, Karlsson, Lennart, Devine, Steven T.
• Primary Examiner(s): Smith; Duane
• Assistant Examiner(s): PHAM, MINH CHAU THI
• Application Number:
  US11/365,571
• Publication Number:
  US 20070204579A1
• Time in Patent Office: 1,882 Days
• Field of Search: 554/82, 554/95, 554/97, 554/99, 555/00, 555/01, 555/02, 555/21, 55D/IG.5, 55D/IG.31, 264/DIG.48
• US Class Current: 55/521
• CPC Class Codes: B01D 46/0001 Making filtering elements
• CPC Class Codes: B01D 46/10 Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
• CPC Class Codes: B01D 46/121 V-type arrangements
• CPC Class Codes: B01D 46/521 using folded, pleated material
• CPC Class Codes: B01D 46/58 connected in parallel
• CPC Class Codes: Y10S 264/48 Processes of making filters
• CPC Class Codes: Y10S 55/05 Methods of making filter
• CPC Class Codes: Y10S 55/31 Filter frame

Abstract

Embodiments of the invention generally include a filter assembly having a media pack having a single web of pleated media having at least two mini-seated regions arranged in non-linear orientation. In one embodiment, a filter assembly includes a media pack defined by a single web of media, and an adhesive layer coupling a flat end of the media pack to a frame assembly to from a lap joint. In another embodiment, a filter assembly includes a media pack sealed to a frame assembly. A discontinuous layer of adhesive couples at least one edge of the media pack to the frame assembly.

Claims

1. A filter assembly comprising:

a frame assembly;

a media pack having a single web of pleated media having at least two mini-pleated regions arranged in non-linear orientation, the pleated media pack terminating in flat ends;

a bank separator disposed between the mini-pleated regions, wherein the bank separator includes a channel and a form extending from the channel between facing sides of adjacent mini-pleated regions; and

an adhesive layer coupling the flat ends of the media pack to opposite sides of the frame assembly.

2. The filter assembly of claim 1, wherein the media is at least one of synthetic filter media, cellulous filter media, wet laid fiber glass filter media or fiber glass filter media.

3. The filter assembly of claim 1, wherein the filter media further comprises:

a filtering layer; and

a backing layer.

4. The filter assembly of claim 3, wherein the backing layer is metal.

5. The filter assembly of claim 3, wherein the backing layer is a wire grid.

6. The filter assembly of claim 1, wherein the frame assembly further comprises:

a top panel;

a bottom panel; and

two side panels coupled to form a quadrilateral.

7. The filter assembly of claim 6, wherein the frame assembly further comprises:

two tabs extending from opposite sides of the frame assembly, a respective one of each tab extending from a respective side panel and having the flat end of the media pack coupled thereto by a lap joint, wherein the lap joint comprises an adhesive positioned between the flat end of the media pack and the respective one of each tab.

8. The filter assembly of claim 7, wherein the side panel further comprises:

a wall defining a side of the filter assembly; and

a flange extending inward from the wall, wherein the tab is coupled to the flange.

9. The filter assembly of claim 8, wherein the flange further comprises:

an outer wall having a first end coupled to the wall; and

an inner wall coupled at a first end to the outer wall and coupled at a second end to the tab.

10. The filter assembly of claim 8, wherein the tab is oriented between about 30 and to about 90 degrees relative to the wall.

11. The filter assembly of claim 7, wherein the tabs are at least 1.0 inches long.

12. The filter assembly of claim 8, wherein the tab has a length greater than a length of the flange.

13. The filter assembly of claim 9, wherein the tab extends at least as far or further from the wall than the flange.

14. The filter assembly of claim 1 further comprising:

an adhesive layer coupling an open end of the media pack to the frame.

15. The filter assembly of claim 14, wherein the adhesive layer coupling an open end of the media pack to the frame is disposed in a substantially swirling pattern.

16. The filter assembly of claim 14, wherein the adhesive layer coupling an open end of the media pack to the frame has a zig-zag pattern and is disposed on the frame in at least one V-shaped pattern.

17. The filter assembly of claim 15, wherein the adhesive layer coupling an open end of the media pack to the frame further comprises:

one or more adhesive strings having interspersed touching and separated portions.

18. The filter assembly of claim 14, wherein the adhesive layer coupling an open end of the media pack to the frame is a hot melt.

19. A filter assembly comprising:

a frame assembly having first and second tabs extending from opposite sides of the frame assembly;

a media pack having a single web of pleated media having a first flat end coupled by a lap joint to the first tab and a second flat end coupled to the second tab, the media pack having at least two mini-pleated regions arranged in v-bank orientation, wherein the lap joint comprises an adhesive positioned between the first flat end of the media pack and the first tab; and

a bank separator disposed between the mini-pleated regions forming v-banks therebetween, wherein the bank separator further comprises;

at least one channel extending across opposite sides of the frame assembly; and

a form extending from the channel into the area defined between adjacent mini-pleat regions.

20. A filter assembly comprising:

a frame assembly having first and second tabs extending from opposite sides of the frame assembly;

a media pack having a single web of pleated media having at least two mini-pleated regions arranged in v-bank orientation;

hot melt adhesive forming a first lap joint between a first flat end of the media pack and the first tab and a second lap joint between a second flat end of the media pack and the second tab;

a bank separator extending across opposite sides of the frame assembly and into the area defined between adjacent mini-pleat regions, wherein the bank separator includes a channel and a form extending from the channel between facing sides of adjacent mini-pleated regions; and

an adhesive layer coupling a open end of the media pack to one side the frame assembly, wherein the adhesive layer has a weight of less than about 50 grams/square foot.