Filter cartridge comprising a weld seam

Patent metadata

Field	Value
Publication number	US-10220344-B2
Application number	US-201615214485-A
Country	US
Kind code	B2
Filing date	Jul 20, 2016
Priority date	Jul 21, 2015
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

A filter cartridge has a folded filter medium that is formed into a prism at least in regions and comprises two interconnected end folds, and which filter cartridge is constantly or cyclically subjected to stresses, specifically subjected to stresses from dedusting by means of pressure surges, is characterized in that the end folds overlap one another.

First claim

The invention claimed is:

1. A filter cartridge, comprising:
a folded filter medium folded to include a plurality of folds including a first and a second end fold,
wherein the folded filter medium is formed into a prism at least in regions with a plurality of radially projecting points so that the first and second end folds overlap one another, so as to form a wall of one of the plurality of points of the folded filter medium, and
wherein the wall is inclined relative to a radial direction.

2. The cartridge of claim 1 , wherein the first and second end folds are welded together.

3. The cartridge of claim 1 , wherein the first and second end folds are ultrasonically welded together.

4. The cartridge of claim 1 , wherein the first and second end folds each have a depth that is smaller than a depth of the wall.

5. The cartridge of claim 1 , wherein the first and second end folds overlap one another, forming a 360° closed structure in a manner that is not back-to back.

6. The cartridge of claim 1 , wherein the first and second end folds are welded together by pulsed ultrasonic welding.

7. The cartridge of claim 1 , wherein a bond between the first and second ends is integral.

8. The cartridge of claim 1 , wherein the wall has the same depth as remaining folds of a concertina that forms the prism.

9. The cartridge of claim 1 , further comprising:
an external band.

10. The cartridge of claim 1 , wherein a cover and a base of the prism are parallel to one another.

11. The cartridge of claim 1 , wherein a cover and a base of the prism are inclined towards one another.

12. The cartridge of claim 1 , wherein a cover and a base of the prism are inclined towards one another and the prism is cut off obliquely.

13. An air filter system, comprising the cartridge of claim 1 .

14. A method of separating dust from dust-containing air, the method comprising:
contacting the air with the cartridge of claim 1 .

15. A method, comprising:
carrying out a primary shaping or reshaping of an object in the presence of the cartridge of claim 1 .

16. A method, comprising:
welding in the presence of the cartridge of claim 1 .

17. A method, comprising:
casting in the presence of the cartridge of claim 1 .

18. A method, comprising:
cutting an object in the presence of the cartridge of claim 1 .

19. A method of making the cartridge of claim 1 , comprising:
ultrasonic welding the first and second ends.

20. The method of claim 19 , wherein the ultrasonic welding is pulsed.

Assignees

• Freudenberg Carl Kg

Inventors

• Schulz Karsten
• Hirsch Georg
• Krahmer Andreas
• Kaffenberger Rainer
• Wiegand Hans

Classifications

• B01D29/333

  with corrugated, folded filtering elements · CPC title

• B01D29/232

  with corrugated, folded or wound sheets · CPC title

• B01D46/0001 Primary

  Making filtering elements · CPC title

• B01D46/521 Primary

  using folded, pleated material · CPC title

• B01D2275/206

  Special forms, e.g. adapted to a certain housing · CPC title