Method of adhering a pleated filtration media and filter and media filter stack using same

• US 8,986,414 B2
• Filed: 02/28/2013
• Issued: 03/24/2015
• Est. Priority Date: 02/29/2012
• Status: Active Grant

• Current Assignee: Challen Sullivan
• Original Assignee: Challen Sullivan
• Inventors: Sullivan, Challen
• Primary Examiner(s): Greene, Jason M
• Assistant Examiner(s): Hawkins, Karla
• Application Number:
  US13/781,648
• Publication Number:
  US 20130219844A1
• Time in Patent Office: 754 Days
• Field of Search: 554/96, 555/21, 553/51, 553/52, 553/54, 952/73, 952/77, 964/29
• US Class Current: 55/496
• CPC Class Codes: B01D 2201/12 Pleated filters
• CPC Class Codes: B01D 2201/127 with means for keeping the spacing between the pleats
• CPC Class Codes: B01D 29/012 Making filtering elements making bag, cage, hose, tube, sleeve or like filtering elements B01D29/111
• CPC Class Codes: B01D 29/07 with corrugated, folded or wound filtering sheets
• CPC Class Codes: B01D 46/0001 Making filtering elements
• CPC Class Codes: B01D 46/0005 Mounting of filtering elements within casings, housings or frames B01D46/2422 takes precedence
• 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 46/522 with specific folds, e.g. having different lengths
• CPC Class Codes: B01D 46/523 with means for maintaining spacing between the pleats or folds
• CPC Class Codes: B01D 46/526 in stacked arrangement
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A method of manufacturing a selected spacing folded, pleated media by preparing a pre-pleated sheet of filter media having pleats with peaks and troughs throughout its length applying an at least one adhesive element along the pre-pleated sheet of filter media; advancing and cutting the pre-pleated sheet of material; compressing the cut length of pre-pleated sheet of filter material, resulting in folding of the pleats and adherence of the pleats into a folded, pleated filter media stack that is selectively separable; selectively separating the media stack and selecting a pleat spacing for a selected pleat spacing section application of an at least one spacing support element at the peaks of each pleat and refolding and recompressing into a selected spacing folded, pleated media stack wherein the media stack is adhered and can be selectively removed to extend from a compacted state to a deployed state with the selected pleat spacing.

Claims

1. A method of manufacturing a selected spacing folded, pleated media stack comprising:

preparing a pre-pleated sheet of filter media having pleats with peaks and troughs throughout its length;

applying an at least one adhesive element along the pre-pleated sheet of filter media applied to all of the pleats;

advancing and cutting the pre-pleated sheet of material to specific length to form a cut length of pre-pleated sheet of filter media with the at least one adhesive element applied thereon;

compressing the cut length of pre-pleated sheet of filter material, the process of compressing the cut length of pre-pleated sheet of filter media resulting in folding of the pleats and adherence of the pleats of the cut length of pre-pleated sheet of material into a folded, pleated filter media stack that is selectively separable;

selectively separating the folded, pleated filter media stack and selecting a pleat spacing for a selected pleat spacing section, the size of the pleat spacing section corresponding to the selected pleat spacing;

further application of an at least one spacing support element at the peaks of each pleat in adhesive contact with the selected pleat spacing section, adhering the peaks of the selected pleat spacing section to the at least one spacing support element to secure the selected pleat spacing in the cut pre-pleated filter media material that comprises the folded, pleated filter media stack; and

refolding and recompressing the folded, pleated filter media stack and the at least one spacing support element into a selected spacing folded, pleated media stack wherein the media stack is adhered and can be selectively removed to extend the folded, compacted filter media pack from the folded, compacted state to a deployed state with the selected pleat spacing.

2. The method of claim 1, wherein the step of applying the at least one adhesive element further comprises applying multiple adhesive elements at multiple application points across the pre-pleated sheet of filter media.

3. The method of claim 2, wherein the step of applying the multiple adhesive elements further comprises applying three lines of adhesive elements, wherein the adhesive elements are three lines of double sided tape with an adhesive.

4. The method of claim 3, wherein step of applying the multiple adhesive elements further comprises applying the three lines of adhesive lengthwise on the pre-pleated sheet of filter media with a first line being on a first edge of the pre-pleated sheet of filter media, a second line being at a middle point of the pre-pleated sheet of filter media, and a third being on a second edge of the pre-pleated sheet of filter media.

5. The method of claim 2, wherein the step of applying multiple adhesive elements at multiple application points across the pre-pleated sheet of filter media further comprises applying perpendicular lies of multiple adhesive elements across the pre-pleated sheet of filter media.

6. The method of claim 1, wherein the step of applying an at least one adhesive element further comprises the step of varying at least one of the type, angle, distribution, location, and type of adhesive as between the at least one adhesive element.

7. The method of claim 3, wherein applying three lines of adhesive elements further comprises the method step of varying the application of at least one of the angle, distribution, location, and type of adhesive as between the three lines of adhesive elements.

8. The method of claim 1, wherein the step of applying adhesive elements further comprises applying an at least one adhesive element selected from the group comprising at least one of glue spots, adhesive tabs, liquid glue, hot melt, tape, spray on dispersion, pattern adhesives, adhesive single sided tape, adhesive double sided tape, contact adhesives, glue dots, adhesive gel, gel dots, adhesive cloth, tapes with adhesives, meshes with adhesives, any folding member with these adhesives, gelatin, and natural adhesive compounds.

9. The method of claim 1, wherein the step of applying an at least one adhesive element further comprises applying a hot melt adhesive that is pattern coated onto the length of the pre-pleated sheet of filter media.

10. The method of claim 2, wherein the step of applying multiple adhesive elements at multiple application points further comprises moving at least one of the applied multiple adhesive elements in an at least one direction to or from a center point of the pre-pleated sheet of filter media so as to vary a resulting point of adhesive contact on individual pleats of the pre-pleated sheet of filter media.

11. The method of claim 1, further comprising applying an at least one protective liner component on the at least one adhesive component to selectively protect against adhesion of the pleats of the pre-pleated material during the manufacturing process.

12. The method of claim 11, further comprising the method step of removing the at least one protective liner applied to the at least one adhesive element.

13. The method of claim 1, wherein the step of selectively separating the folded, pleated filter media stack further comprises selectively separating each pleat the entire pleat, releasing the at least one adhesive element in contact therewith, prior to the selection of a pleat spacing section and the step of applying a spacing support element.

14. The method of claim 1, wherein the step of selectively separating the folded, pleated filter media stack further comprises selectively separating each pleat along only a portion of the pleat, releasing only a portion of each pleat, prior to the selection of a pleat spacing section and the step of applying a spacing support element.

15. The method of claim 1, wherein the method step of selectively separating the folded, pleated filter media stack along an at least one portion of the length of each adhered pleat for a selected pleat spacing section corresponding to a selected pleat spacing or pleat per inch further comprises application of a spacing selector device to select the selected pleat spacing section.

16. The method of claim 1, wherein the selected pleat spacing is between about 0.5 to about 20.

17. The method of claim 1, wherein the selected pleat spacing is between about 1 to about 10.

18. The method of claim 1, wherein the method step of selecting the pleat spacing further comprises selecting a pleat spacing that is relate to at least one of the density of the liquid being filtered, the density of the gas being filtered, the duty rating of the filter media, and the type of filter material.

19. The method of claim 1, wherein in the step of applying the at least one adhesive element and in the step of applying the spacing support element, dissimilar types of adhesive elements are utilized.

20. The method of claim 1, wherein the sheet of filter media is a sheet of high loft filter media and the step of preparing a pre-pleated sheet of filter media having pleats with peaks and troughs throughout its length further comprises preparing a high loft sheet of media, scoring an at least one support grid to allow for forming of pleats, adhering the support grid to the high loft sheet of media and folding the high loft sheet of media to form a pre-pleated sheet of high loft filter media.

21. The method of claim 19, wherein the method of further application of an at least one spacing support element further comprises application of a netting member across the width of the sheet of high loft filter media adhering the netting member to the peaks of the selected pleat spacing section to secure the selected pleat spacing in the cut pre-pleated high loft filter media sheet and the refolding and recompressing step further comprises refolding and recompressing the cut pre-pleated high loft filter media sheet such that the cut, pre-pleated high loft filter media sheet is folded and adhered and the netting is similarly folded to form the selected spacing folded, pleated media stack.

22. The method of claim 1, wherein the step of applying adhesive elements further comprises applying an at least one adhesive element wherein the amount of adhesive in the adhesive element is inversely proportional to a desired spacing of the pleats in the pleated filter media.

23. A folded, pleated media stack product manufactured by the method of claim 1.

24. A pre-selected spacing folded, pleated media stack or cartridge comprising:

a cut portion of pre-pleated filter media having pleats, each pleat having a top and a trough and a successive top;

an at least one adhesive element running along the length of the cut portion of pre-pleated filter media through each pleat from each top to trough to the successive top;

an at least one adhered section between the top and successive top of the pleat being adhered by the at least one adhesive element; and

an at least one pleat spacing section wherein the at least one pleat spacing section is selected and then an at least one spacing support element is adhered to each pleats top and successive top such that the at least one spacing support element maintains the spacing in the at least one pleat spacing section such that the at least one adhesive element selectively adheres the pleated material in a selected spacing folded, pleated media stack when compressed with the at least one spacing support element further folded and compacted and the selected spacing folded, pleated media stack allowing for selective release of each pleat from the compressed state to an operating state such that the at least one adhered section is retained and the spacing support element maintains the spacing when in the operating state.

25. The pre-selected spacing folded, pleated media stack or cartridge of claim 24, wherein the at least one adhering element and the at least one pleat spacing support element are each a self-adhering tape.

26. The pre-selected spacing folded, pleated media stack or cartridge of claim 24, wherein the at least one adhering element is on a first side of the media stack or cartridge and the at least one pleat spacing support element is on an second side of the media stack or cartridge.

27. The pre-selected spacing folded, pleated media stack or cartridge of claim 24, wherein the at least one adhering element is on a first side of the media stack or cartridge and the at least one pleat spacing support element is on said same first side of the media stack or cartridge.

28. The pre-selected spacing folded, pleated media stack or cartridge of claim 24, wherein the at least one adhering element has interspaced non-adhering portions thereon corresponding to elements within the spaced pleats.

29. A filter media cartridge, comprising:

an at least one frame member having a pleated, folded filter media mounted therein; and

an at least one movement member having the pleated folded filter media mounted thereon and free to move thereon, wherein the pleated folded filter media mounted thereto has an at least one adhesive element attached which is compressed such that the pleats of the pleated folded filter media are adhered when in a compacted pleated folded media stack within the housing the filter media cartridge being deployed from the compacted pleated folded media stack when in a filter device and moved from the adhered compacted pleated, folded state to an expanded state while providing side sealing in the filter device.

30. The filter media cartridge of claim 29, wherein the at least one movement member is a motor.

31. The filter media cartridge of claim 29, wherein the at least one movement member is a user manually moving the filter media stack within the filter media cartridge.

32. The filter media cartridge of claim 31, wherein the at least one movement member is pull tab pulled by the user.

33. The filter media cartridge of claim 29, further comprising a locking mechanism, wherein the movement member moves the filter media stack and the locking mechanism locks the media at a position whereby it is deployed.