Method for producing filter bellows

Patent metadata

Field	Value
Publication number	US-10556200-B2
Application number	US-201715803916-A
Country	US
Kind code	B2
Filing date	Nov 6, 2017
Priority date	May 4, 2015
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

In a method for producing two or more filter bellows, a bellows with a filter medium with fold edges is provided, wherein the filter medium is running in a running direction. A cutting path is carried out in the bellows with the filter medium in a direction that, at least in some regions, is transverse relative to the fold edges such that the filter bellows are produced in parallel and the cutting path creates end edge faces and/or side faces of the filter bellows and the filter bellows are embodied lying adjacent to each other and symmetrical or point-symmetrical relative to each other in the running direction and/or transverse to the running direction. A filter element with such a filter bellows and a filter system with such a filter element and filter bellows arranged in a filter housing are provided.

First claim

What is claimed is:

1. A method for producing two or more filter bellows, the method comprising:
providing a cutting device adapted for cutting a filter bellows having zig-zag erected folds;
providing a continuous running web of filter bellows comprising a plurality of zigzag shaped erected folds, the plurality of erected folds arranged one after the other in a running direction of the running web of filter bellows, the erected folds having fold edges which extend across a width of the running web of filter bellows, the fold edges arranged traverse to a running direction of the running web of filter bellows;
carrying out a cutting path in the running web of filter bellows in a direction that, at least in some regions, is transverse relative to the fold edges such that the filter bellows are produced in parallel and the cutting path creates end edge faces and/or side faces of the filter bellows and the filter bellows are embodied lying adjacent to each other and symmetrical or point-symmetrical relative to each other in the running direction and/or transverse to the running direction;
wherein the cutting path comprises a first cutting path and a second cutting path carried out as follows:
providing the first cutting path for a first filter bellows to be cut from the running web of filter bellows,
the first filter bellows having an outer boundary delimited by end face edges and end face rims of the first filter bellows to be cut;
wherein the first cut path is a path for the cutting device to follow on the running web of filter bellows to cutout the first filter bellows;
determining the second cutting path to cutout a second filter bellows as a mirrored image of the first cutting path of the first filter bellows,
either by the steps of:
mirroring the first cutting path about a first plane, the first plane perpendicular to an image plane of the fold edges of the zig-zag erected folds, the first plane extending in the running direction of the running web of filter bellows;
mirroring the mirrored first cutting path about a second plane perpendicular to the image plane of the fold edges of the zig-zag erected folds and perpendicular to the first plane, to create the second cutting path of a second filter bellows,
wherein the first cutting path is arranged on a first portion of the width of the running web of filter bellows;
wherein the second cutting path is arranged on an adjacent second portion of the width of the running web of filter bellows; and
wherein the first cutting path and the second cutting path are arranged adjacent to each other in a traverse direction, across the width of the running web of filter bellows so as to reduce cutting scrap and filter medium waste;

or by the steps of:
mirroring the first cutting path about a first plane, the first plane perpendicular to an image plane of the fold edges of the zig-zag erected folds, the first plane extending in the running direction of the running web of filter bellows;
mirroring the mirrored first cutting path about a second plane perpendicular to the image plane of the fold edges of the zig-zag erected folds and perpendicular to the first plane, to create the second cutting path of a second filter bellows,
wherein the first cutting path and the second cutting path are arranged one behind the other in the running direction and arranged adjacent to each other; and
wherein the first cutting path and the second cutting path are arranged adjacent to each other in the running direction so as to reduce cutting scrap and filter medium waste;

using the cutting device, cutting the running web of filter bellows along the first cutting path to cut out the first filter bellows, and cutting the running web of filter bellows along the second cutting path to cut out the second filter bellows from the running web of filter bellows.

2. The method according to claim 1 , comprising
carrying out the cutting path with a directional change along the running direction.

3. The method according to claim 2 , wherein
the directional change is carried out with one or more angles of less than 45°.

4. The method according to claim 2 , wherein
the directional change is carried out with one or more radii.

5. The method according to claim 1 , comprising
producing at least four of the filter bellows in parallel by the steps of:
carrying out the cutting path with the first cutting path and the second cutting path adjacent to each other in a traverse direction, across the width of the running web of filter bellows to produce the first and second filter bellows;
mirroring the cutting path about a first plane, the first plane perpendicular to an image plane of the fold edges of the zig-zag erected folds, the first plane extending in the running direction of the running web of filter bellows;
mirroring the mirrored first cutting path about a second plane perpendicular to the image plane of the fold edges of the zig-zag erected folds and perpendicular to the first plane, to create a cutting path for cutting out a third and a fourth filter bellows, wherein the a third and a fourth filter bellows are arranged behind the first and second filter bellows in the running direction.

6. The method according to claim 5 , comprising
carrying out the cutting path along the running direction with a directional change transverse to the running direction.

7. The method according to claim 6 , wherein
the directional change is carried out with one or more angles of less than 45°.

8. The method according to claim 6 , wherein
the directional change is carried out with one or more radii.

9. The method according to claim 1 , wherein
the filter bellows each a have a leading side face and a rear side face,
wherein the leading side face and the rear side face are embodied complementary to each other due to a point symmetry.

10. The method according to claim 1 , wherein
the filter medium comprises cellulose.

11. A filter element for filtering a fluid, the filter element comprising:
a filter bellows comprising
a filter medium folded along fold edges in a zigzag shape to folds extending between oppositely positioned end edge faces of the filter bellows, respectively,
wherein the filter bellows comprises
opposite side faces connecting the end edge faces,
wherein the folds along the end edge faces are laterally sealed,
wherein at least one of the end edge faces and/or one of the side faces experiences a directional change,
wherein the filter bellows is produced according to the method of claim 1 .

12. The filter element according to claim 11 , wherein
the folds along the end edge faces are laterally sealed by at least one sealant bead or a lateral band.

13. The filter element according to claim 11 , wherein
the filter bellows comprises
a circumferentially extending seal on a raw fluid side and/or a clean fluid side of the filter bellows along an edge of the filter bellows facing the raw fluid side and/or the clean fluid, respectively.

14. The filter element according to claim 13 , wherein
the circumferentially extending seal is foamed onto the filter bellows.

15. A filter system comprising:
a filter housing comprising
at least a housing bottom part and
a housing top part,
wherein the housing bottom part and the housing top part are fluid-tightly and detachably connected to each other;

a filter element comprising
a filter bellows comprising
a filter medium folded along fold edges in a zigzag shape to folds extending between oppositely positioned end edge faces of the filter bellows, respectively,

wherein the filter bellows comprises
opposi

Assignees

• Mann & Hummel Gmbh

Inventors

• Dirnberger Timo
• Roehrig Markus
• Schmid Daniel
• Epli Sven
• Schmidl Markus

Classifications

• B01D39/18

  the material being cellulose or derivatives thereof ({cork or peat B01D39/1646} ; making filter paper D21F11/14) · CPC title

• B01D46/521 Primary

  using folded, pleated material · CPC title

• B01D2275/206

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

• B01D46/0001

  Making filtering elements · CPC title

• B01D2279/60

  for the intake of internal combustion engines or turbines · CPC title