Pulse cleanable deep pleated industrial filter

Patent metadata

Field	Value
Publication number	US-2021129068-A1
Application number	US-202017087980-A
Country	US
Kind code	A1
Filing date	Nov 3, 2020
Priority date	Nov 5, 2019
Publication date	May 6, 2021
Grant date	—

Abstract

A filter media pack with pleat folds, pleat panels and a plurality of glue bead sections is provided. The glue bead sections provide increased rigidity, dimensional stability and maintain spacing between adjacent pleat panels. Methods of manufacturing the filter media packs are provided. Filter elements including the filter media packs are contemplated.

First claim

What is claimed is:

1 . A filter element comprising:
a pleated media pack formed from a continuous sheet of filter media having opposed surfaces with a thickness therebetween, the pleated filter media having:
a plurality of pleat panels, each pleat panel of the plurality of pleat panels having a height;
a plurality of pleat folds, each pleat fold of the plurality of pleat folds interconnecting a corresponding pair of adjacent pleat panels of the plurality of pleat panels, each pleat fold having a fold inner side and a fold outer side, the height of each pleat panel being defined between the pleat folds associated with each pleat panel;
at each pleat fold, there is:
an outer glue bead section on the fold outer side extending across the pleat fold with the pleat fold interposed between opposed first and second ends of the outer glue bead section, the outer glue bead section having a first portion between the first end and the pleat fold and a second portion between the second end and the pleat fold;
a first inner glue bead section extending between first and second ends on the fold inner side overlapped with the first portion of the outer glue bead section, the first inner glue bead section is spaced away from the pleat fold and does not extend across the pleat fold;
a second inner glue bead section extending between first and second ends on the fold inner side overlapped with the second portion of the first inner glue bead section, the second inner glue bead section is spaced away from the pleat fold and does not extend across the pleat fold;
when folded, the first and second inner glue bead sections at each pleat fold contact one another to secure the adjacent pleat panels interconnected by the pleat fold relative to one another.

2 . The filter element of claim 1 , wherein:
a first distance is defined between the second end of the first inner glue bead and the pleat fold; a second distance is defined between the first end of the second inner glue bead and the pleat fold; and the second distance is different than the first distance.

3 . The filter element of claim 1 or any preceding claim, wherein a thickness of the first, second and second inner glue bead sections at each pleat fold measured perpendicular to the surfaces of the sheet of filter media are substantially the same.

4 . The filter element of claim 1 or any preceding claim, wherein the outer glue bead section at one pleat fold is on an opposite surface of the sheet of filter media as the outer glue bead section at another immediately adjacent pleat fold.

5 . The filter element of claim 1 or any preceding claim, wherein for each pleat panel of the plurality of pleat panels, the pleat panel has attached thereto:
the first portion of an outer glue bead section at a first pleat fold connected to the pleat panel;
the first inner glue bead section at the first pleat fold connected to the pleat panel;
the second portion of an outer glue bead section at a second pleat fold connected to the pleat panel;
the second inner glue bead section at the second pleat fold connected to the pleat panel.

6 . The filter element of claim 5 , wherein for each pleat panel of the plurality of pleat panels:
the first portion of the outer glue bead section at the first pleat fold connected to the pleat panel and the second inner glue bead section at the second pleat fold connected to the pleat panel are located on a same first surface of the pleat panel; and the second portion of the outer glue bead section at the second pleat fold connected to the pleat panel and the first inner glue bead section at the first pleat fold connected to the pleat panel are located on a same second surface of the pleat panel, the second surface being opposite the first surface.

7 . The filter element of either claim 5 or 6 , wherein:
a first gap is formed between the first portion of the outer glue bead section at the first pleat fold connected to the pleat panel and the second inner glue bead section at the second pleat fold connected to the pleat panel; and
a second gap is formed between the second portion of the outer glue bead section at the second pleat fold connected to the pleat panel and the first inner glue bead section at the first pleat fold connected to the pleat panel.

8 . The filter element of claim 7 , wherein a mid-point of the height of each pleat panel located between the first and second pleat folds connected to the pleat panel is positioned within the first and second gaps.

9 . The filter element of claim 8 , wherein the first and second gaps are centered on the mid-point of the height.

10 . The filter element of claim 9 , wherein lengths of the first portion of the outer glue bead section at the first fold connected to the pleat panel and the second portion of the outer glue bead section at the second fold connected to the pleat panel are greater than lengths of the first and second gaps.

11 . The filter element of claim 1 or any preceding claim, wherein when the sheet of filter media is folded, the first portion of an outer glue bead at a first fold contacts the second portion of an outer glue bead at a second fold, the first and second folds not being connected to a same pleat panel.

12 . The filter element of claim 2 , wherein:
the first inner glue bead section has a first length; the second inner glue bead section has a second length; at each pleat fold, when folded:
the first end of the first inner glue bead aligns with the second end of the second inner glue bead; and
the second end of the first inner glue bead is offset from the first end of the second inner glue bead, with the second end of the first inner glue bead being closer to the pleat fold than the first end of the second inner glue bead.

13 . The filter element of claim 2 or 12 , wherein:
at each pleat fold, each pleat panel interconnected by the pleat fold has a tapered portion extending outward from the pleat fold less than or equal to the second distance, the tapered portions tapering away from one another when moving away from the pleat fold.

14 . The filter element of claim 13 , wherein the first distance is less than 10% of the height of the pleat panels.

15 . The filter element of claim 13 or 14 , wherein:
each pleat panel has:
two tapered portions, one tapered portion associated with each pleat fold connected to the pleat panel;
a parallel portion formed between the tapered portions;

the parallel portions of adjacent pleat panels being parallel with one another, when the filter media sheet is folded about the pleat folds.

16 . The filter element of claim 15 , wherein each parallel portion has a length that is at least 80% of the height of the pleat panel.

17 . The filter element of any one of claims 13 - 16 , wherein a thickness of any glue forming any glue bead or beads between adjacent tapered portions proximate each pleat fold is less than twice the thickness of any one of the outer glue bead section, the first inner glue bead section or the second inner glue bead section.

18 . The filter element of claim 1 or any preceding claim, wherein no glue blead extends across the pleat fold on the inner side of the pleat folds.

19 . The filter element of claim 1 or any preceding claim, wherein:
the plurality of pleat folds alternate between being folded in a first fold direction and a second fold direction that is opposite the first fold direction; and
for each pleat fold, the fold inner side is positioned between the corresponding pair of adja

Assignees

• Canfield Jeff A
• Ladwig Jeffery M
• Kadavy Dale R
• Parker Hannifin Corp

Inventors

• Canfield Jeff A
• Ladwig Jeffery M
• Kadavy Dale R

Classifications

• B01D46/525 Primary

  which comprises flutes · CPC title

• B01D2258/06

  Polluted air · CPC title

• B01D46/71

  with pressurised gas, e.g. pulsed air · CPC title

• B01D46/522 Primary

  with specific folds, e.g. having different lengths · CPC title

• B01D46/0001

  Making filtering elements · CPC title