WO1998052675A1 - Nestable pleated filter - Google Patents
Nestable pleated filter Download PDFInfo
- Publication number
- WO1998052675A1 WO1998052675A1 PCT/US1998/010039 US9810039W WO9852675A1 WO 1998052675 A1 WO1998052675 A1 WO 1998052675A1 US 9810039 W US9810039 W US 9810039W WO 9852675 A1 WO9852675 A1 WO 9852675A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- central panel
- filter
- corrugated
- accordance
- frame members
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
- B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/31—Filter frame
Definitions
- This invention relates to filters for removing particles from a fluid, such as air, flowing through a confined path.
- the invention relates more specifically to a nestable filter having a pleated central region.
- Filters for filtering particles from a fluid flow path are generally planar and rectangular.
- the conventional filter consists of an outer frame providing structural rigidity to a flexible, foraminous filter medium extending between the frame members .
- a backing structure supporting the rear (down-flow) side of the filter medium is commonly used to prevent the force of the flowing air directed against the filter medium from separating the filter medium from the frame, and from physically distorting the filter and causing loss of its peripheral seal .
- This backing is normally a screen or other perforated, strong, planar structure.
- the frames around the pleated filter media are C-shaped in cross-section, the side leg of which abuts against the edges of the pleated filter medium, and the upper and lower legs of which abut against the upper and lower surfaces of the pleated filter medium.
- the filter of the present invention comprises a corrugated central panel having elongated corrugations arranged in a plane.
- the corrugations extend longitudinally from a first peripheral edge of the central panel to a second peripheral edge of the central panel .
- the central panel has a first face and an oppositely directed second face.
- the filter further comprises at least two frame members .
- Each frame member is mounted to one of the peripheral edges of the central panel, and comprises an elongated wall extending at an obtuse angle from the plane of the central panel to permit nesting.
- Each frame member has corrugated voids extending in from a longitudinally extending edge of the elongated wall to permit nesting receipt of the corrugations of a similarly constructed filter.
- the corrugated central panel and frame members are made of a rigid filtration material.
- the central panel comprises a corrugated support having a plurality of apertures formed therein, and a filter medium mounted to a face of the support .
- the corrugated support forms a unitary, rigid backing for the filter medium.
- Fig. 4 is a top view illustrating the preferred embodiment.
- Fig. 5 is a side view in section of the embodiment of Fig. 4.
- Fig. 10 is a side view in section illustrating an alternative frame.
- Fig. 11 is a side view in section illustrating two similar, nested filters.
- Fig. 12 is a side view in section illustrating an alternative embodiment.
- the inner wall 22 of the frame member 25 has corrugated voids 23 extending upwardly from its lower edge.
- the corrugated voids 23 are formed in the inner wall 22 to align with the channels in the underside of the corrugated panel 30.
- Similar corrugated voids are also formed on the inner wall 31 of the frame member 27. These similar voids (not shown in Fig. 2) are also aligned with the channels on the central panel's 30 underside.
- a corrugated, sawtooth-shaped joint is formed between the opposite, longitudinal ends of the corrugations of the central panel 30 and the lower edges of the inner walls 22 and 31.
- each protruding part of one body must nest within the corresponding part of another body.
- the angle between the walls of the frame 20 permits this nesting relationship between the frames of filters embodying the present invention.
- the channels on the bottom of the central panel 30 effectively extend beyond the inner walls 22 and 31. Therefore, ridges in the top of a similar filter can nest in these channels.
- the preferred filter 10 is preferably made by heating a sheet of thermoplastic resin such as PET or polyester to provide substantial flexibility, and vacuum forming it into the corrugated support 32 with attached, integral frame members 24-27.
- the beams 36 are given their U-shaped cross-section.
- the rectangular apertures 34 are formed between the beams 36 in the corrugations of the support 32, preferably by die cutting.
- Alternative methods of forming the apertures 34 are well known, and include water-jet cutting and laser cutting.
- the support 32 can alternatively be formed by an injection molding or a pulp paper method.
- the corrugated central panel and the frame can be formed of a single piece of filter medium which is sufficiently rigid when finished to support itself during use.
- particles can be added to the mixture of pulp, carrier fluid and binder to promote the formation of small pores in the finished filter.
- This hardened structure can then be used as a filter.
- glass fibers can be directed onto a mold and hardened into a porous, rigid structure having the shape of the preferred embodiment .
- each pleat including the filter medium
- the filter medium is about 1/8 inch thick, and compresses to approximately 1/16 of an inch at the peaks. Due to the thickness and density of filter medium used in the preferred embodiment, the peaks and channels are preferably rounded to a radius of approximately 1/4 inch to prevent "blinding" . Blinding occurs when air cannot flow through a folded portion of the filter material due to too sharp of an angle. Blinding stops, or restricts, air from flowing through a portion of the filter causing that portion to lose its dust-holding capacity. For a thicker filter medium, a radius greater than 1/4 inch is necessary, and for a thinner filter medium, a smaller radius is sufficient to avoid blinding.
- a multistage filter combined with multiple pore size filter media provides the advantage of filtering out particles of various sizes. Large particles are removed with an upstream coarse filter medium, and finer particles are removed with downstream positioned finer filter media. Therefore, particles of various sizes are effectively filtered without clogging the fine filter medium with large particles.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98922362A EP1003602A4 (en) | 1997-05-22 | 1998-05-15 | Nestable pleated filter |
CA002289031A CA2289031C (en) | 1997-05-22 | 1998-05-15 | Nestable pleated filter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US861,616 | 1997-05-22 | ||
US08/861,616 US5810898A (en) | 1997-05-22 | 1997-05-22 | Nestable pleated filter |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998052675A1 true WO1998052675A1 (en) | 1998-11-26 |
Family
ID=25336292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1998/010039 WO1998052675A1 (en) | 1997-05-22 | 1998-05-15 | Nestable pleated filter |
Country Status (4)
Country | Link |
---|---|
US (1) | US5810898A (en) |
EP (1) | EP1003602A4 (en) |
CA (1) | CA2289031C (en) |
WO (1) | WO1998052675A1 (en) |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6339217B1 (en) * | 1995-07-28 | 2002-01-15 | General Nanotechnology Llc | Scanning probe microscope assembly and method for making spectrophotometric, near-field, and scanning probe measurements |
BR9910652A (en) * | 1998-05-23 | 2001-01-30 | Patentsmith Tech Ltd | Oven, process for heating a food product with the oven and for cleaning the oven, and gas supply system for a heating or cooling device |
US6033454A (en) * | 1998-07-13 | 2000-03-07 | Aaf International | Air filter assembly |
DE10013315C2 (en) * | 2000-03-17 | 2002-06-06 | Freudenberg Carl Kg | Pleated filter from a multi-layer filter medium |
JP4670166B2 (en) * | 2001-03-21 | 2011-04-13 | トヨタ紡織株式会社 | Filter manufacturing method |
EP1240933A3 (en) * | 2001-03-13 | 2003-01-29 | Toyoda Boshoku Corporation | Production method and apparatus for filter, forming die for filter, forming assembly for forming filter, and filter |
US6726751B2 (en) | 2001-11-13 | 2004-04-27 | Daniel E. Bause | Accordion-pleated filter material and filter element incorporating same |
US7118610B2 (en) * | 2002-12-04 | 2006-10-10 | Brian Lipner | Foldable filter frame |
US7097692B2 (en) * | 2003-09-03 | 2006-08-29 | Sds Industries, Llc | Air filter arrangement and method of making same |
US7156891B2 (en) * | 2004-09-10 | 2007-01-02 | Filtration Group Incorporated | Forced air system air filter |
US7582131B2 (en) * | 2005-09-15 | 2009-09-01 | Conwed Plastics Llc | Plastic support net for filter media |
US20070271887A1 (en) * | 2006-05-24 | 2007-11-29 | Mike Osborne | Nestable Filter and Frame |
US20070289274A1 (en) * | 2006-06-16 | 2007-12-20 | Justice Thomas A | Nestable, low-cost, planar air filter frame |
US20070289272A1 (en) * | 2006-06-16 | 2007-12-20 | Justice Thomas A | Nestable, rigid, planar air filter frame |
US20090183477A1 (en) * | 2008-01-23 | 2009-07-23 | Workman Roger L | Air filter |
US20090301044A1 (en) * | 2008-06-09 | 2009-12-10 | Superior Fibers Llc | air filter frame |
US20110252759A1 (en) * | 2010-04-15 | 2011-10-20 | General Electric Company | Filter |
US8562708B2 (en) | 2010-04-30 | 2013-10-22 | Diversitech Corporation | Three-dimensional filter |
RU2543889C2 (en) | 2010-06-22 | 2015-03-10 | Кларкор Эр Филтрейшн Продактс, Инк. | Air filtration system in facilities for stabling animals using panel air filter with zigzag panel arrangement |
US9126135B2 (en) | 2010-06-22 | 2015-09-08 | Clarcor Air Filtration Products, Inc. | V-bank air filtration system such as for animal confinement |
US9687766B2 (en) | 2011-05-27 | 2017-06-27 | Clarcor Air Filtration Products, Inc. | Collapsible and/or assembled filter housing and filter used therewith |
CN103732305B (en) | 2011-05-27 | 2016-02-03 | 克拉克空气过滤产品有限公司 | The non-V-BANK filter prohibiting facility is stayed for animal |
CN202786257U (en) * | 2011-08-31 | 2013-03-13 | 通用电气健康护理生物科学股份公司 | Exhaust filtration device for bioreactor |
US9034068B2 (en) | 2012-06-05 | 2015-05-19 | Clarcor Air Filtration Products, Inc. | Box filter with orientation device |
US8702829B2 (en) * | 2012-06-07 | 2014-04-22 | 3M Innovative Properties Company | Framed air filter with offset slot, and method of making |
US9278301B2 (en) * | 2013-08-16 | 2016-03-08 | 3M Innovative Properties Company | Nestable framed pleated air filter and method of making |
USD732153S1 (en) | 2013-08-16 | 2015-06-16 | 3M Innovative Properties Company | Air filter |
CA2885565C (en) * | 2014-03-24 | 2022-07-12 | 3M Innovative Properties Company | Framed air filter with integrated nestable joint |
USD894360S1 (en) * | 2015-01-23 | 2020-08-25 | Jose Perez | Air filter |
USD875909S1 (en) * | 2016-06-20 | 2020-02-18 | 3M Innovative Properties Company | Air filter |
JP7065186B2 (en) * | 2017-12-05 | 2022-05-11 | サイマー リミテッド ライアビリティ カンパニー | Non-woven screen for dust capture in laser discharge chamber |
USD898177S1 (en) * | 2019-11-29 | 2020-10-06 | Shenzhen Shenyuanxin Technology Co., Ltd. | Air filter |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3990333A (en) * | 1975-11-10 | 1976-11-09 | Davis Industrial (Filters) Ltd. | Method of forming a filter by die-cutting |
US4105423A (en) * | 1975-12-01 | 1978-08-08 | United States Gypsum Company | Compact air filter with tubular frame |
US4647373A (en) * | 1984-08-30 | 1987-03-03 | Donaldson Company, Inc. | Multi-layered filter apparatus |
US5223138A (en) * | 1991-02-04 | 1993-06-29 | Zievers James F | Reinforced ceramic filter candle and method of making same |
US5320655A (en) * | 1993-05-07 | 1994-06-14 | Zenteco Ag | Incineratable holding frame for filter bags, and method of making the frame |
US5409669A (en) * | 1993-01-25 | 1995-04-25 | Minnesota Mining And Manufacturing Company | Electrically regenerable diesel particulate filter cartridge and filter |
US5505852A (en) * | 1992-03-04 | 1996-04-09 | Minnesota Mining And Manufacturing Company | Filter element for the filtration of fluids |
US5531892A (en) * | 1995-09-15 | 1996-07-02 | Minnesota Mining And Manufacturing Company | Zigzag filter media and frame having triangular pleat stabilizing elements |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
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US3023839A (en) * | 1957-12-26 | 1962-03-06 | Owens Corning Fiberglass Corp | Fibrous glass air filters |
US3154393A (en) * | 1958-04-18 | 1964-10-27 | Fiber Bond Corp | Gas filter |
US3243943A (en) * | 1964-06-15 | 1966-04-05 | American Air Filter Co | Unit filter construction |
US3853529A (en) * | 1971-06-09 | 1974-12-10 | Farr Co | Pleated air filter cartridge |
US3970440A (en) * | 1974-06-06 | 1976-07-20 | United States Gypsum Company | Compact air filter |
US4004899A (en) * | 1975-02-28 | 1977-01-25 | Alfred Giacovas | Air filter construction |
US4277267A (en) * | 1979-12-17 | 1981-07-07 | Perfect Filter Corporation | Air filter assembly |
US4464187A (en) * | 1980-04-03 | 1984-08-07 | Kershaw Eli J | Nesting air filters |
US4420315A (en) * | 1980-04-03 | 1983-12-13 | Kershaw Eli J | Nesting air filters |
US4842739A (en) * | 1987-08-20 | 1989-06-27 | Minnesota Mining And Manufacturing Company | High surface area filter cartridge |
DE59000667D1 (en) * | 1989-02-16 | 1993-02-11 | Sandler Helmut Helsa Werke | FILTERS, IN PARTICULAR FOR A VEHICLE. |
EP0490169B2 (en) * | 1990-12-08 | 1998-04-08 | Knecht Filterwerke Gmbh | Filter cartridge especially for gas filters |
EP0620755B1 (en) * | 1991-12-31 | 1998-06-17 | Minnesota Mining And Manufacturing Company | Filter system for filtering fluids |
US5232480A (en) * | 1992-12-18 | 1993-08-03 | Mark Licatovich | Filter |
US5589067A (en) * | 1995-09-18 | 1996-12-31 | Jason, Inc. | Expanded metal filter support structure |
-
1997
- 1997-05-22 US US08/861,616 patent/US5810898A/en not_active Expired - Lifetime
-
1998
- 1998-05-15 WO PCT/US1998/010039 patent/WO1998052675A1/en not_active Application Discontinuation
- 1998-05-15 EP EP98922362A patent/EP1003602A4/en not_active Withdrawn
- 1998-05-15 CA CA002289031A patent/CA2289031C/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3990333A (en) * | 1975-11-10 | 1976-11-09 | Davis Industrial (Filters) Ltd. | Method of forming a filter by die-cutting |
US4105423A (en) * | 1975-12-01 | 1978-08-08 | United States Gypsum Company | Compact air filter with tubular frame |
US4647373A (en) * | 1984-08-30 | 1987-03-03 | Donaldson Company, Inc. | Multi-layered filter apparatus |
US5223138A (en) * | 1991-02-04 | 1993-06-29 | Zievers James F | Reinforced ceramic filter candle and method of making same |
US5505852A (en) * | 1992-03-04 | 1996-04-09 | Minnesota Mining And Manufacturing Company | Filter element for the filtration of fluids |
US5409669A (en) * | 1993-01-25 | 1995-04-25 | Minnesota Mining And Manufacturing Company | Electrically regenerable diesel particulate filter cartridge and filter |
US5320655A (en) * | 1993-05-07 | 1994-06-14 | Zenteco Ag | Incineratable holding frame for filter bags, and method of making the frame |
US5531892A (en) * | 1995-09-15 | 1996-07-02 | Minnesota Mining And Manufacturing Company | Zigzag filter media and frame having triangular pleat stabilizing elements |
Non-Patent Citations (1)
Title |
---|
See also references of EP1003602A4 * |
Also Published As
Publication number | Publication date |
---|---|
CA2289031A1 (en) | 1998-11-26 |
EP1003602A1 (en) | 2000-05-31 |
US5810898A (en) | 1998-09-22 |
EP1003602A4 (en) | 2002-09-18 |
CA2289031C (en) | 2004-03-16 |
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