US3136720A - Magnetic filter - Google Patents

Magnetic filter Download PDF

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Publication number
US3136720A
US3136720A US67987A US6798760A US3136720A US 3136720 A US3136720 A US 3136720A US 67987 A US67987 A US 67987A US 6798760 A US6798760 A US 6798760A US 3136720 A US3136720 A US 3136720A
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United States
Prior art keywords
magnetic
portions
rib
layer
strip
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US67987A
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English (en)
Inventor
Baermann Max
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Max Baermann GmbH
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Max Baermann GmbH
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/06—Filters making use of electricity or magnetism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
    • 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
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24149—Honeycomb-like

Definitions

  • the invention relates to a filter of the type described employing, as a permanent mag net, a flexible plastic material 'having dispersed therein particles of magnetic material adapted to be magnetized to produce a plurality of spaced north and south poles over its surfaces.
  • the present invention provides a new and'improved magnetic filter which overcomes the aforesaid disadvantages and others, said filter being formed from flexible plastic material having dispersed therein particles of permanent magnetic material.
  • an object of the invention is to provide a magnetic filter in which strips of a flexible plastic material with magnetic particles dispersed therein may be rolled up into a spiral or arranged in layers to provide a filter of any size or shape.
  • a permanent magnetic filter is provided formed from a strip of a flexible or resilient permanent magnet, such strip either being rolled into a spiral with successive turns being spaced one from the other, or cut into lengths which are arranged one upon the other in spaced relationship, in either case to provide spaced opposed surfaces. At least one of the opposed surfaces of the strip is magnetized with spaced north and south poles whereby a fluid containing magnetically permeable particles may pass through the spaces between layers of the strip while the particles cling to the magnetic poles.
  • the flexibility of the permanent magnetic strip it may be used for all filter sizes so that the keeping in stock of different permanent magnetic and accessory parts is greatly simplified.
  • a piece corresponding to the desired size is rolled into a spiral, or divided into single sections and arranged in layers.
  • the magnetic strips of rubber-like plastic material are provided with raised portions or lugs extending across their widths such that when. the strip is cut into sections and arranged in layers or wound into a spiral, the raised portions will serve to space successive layers or turns through which a fluid may pass.
  • layers or turns of the material may be corrugated to produce the same effect.
  • smooth magnetic strips may be employed in combination with spacers or corrugated strips of non-magnetic material inserted between the layers or turns of the filter, as the case may be.
  • FIGURE 1 is an illustration of a magnetic strip provided with raised portions or lugs extending across its width and magnetized to produce north and south poles on opposite edges of the strip;
  • FIGURE 2 is an illustration of a filter formed by winding a magnetic strip such as that shown in FIGURE 1 into a spiral;
  • FIGURE 3 is an illustration of a filter in which sections of the permanent magnetic strip shown in FIGURE 1 are arranged in spaced layers;
  • FIGURE 4 is an illustration of a filter in which sections of acorrugated permanent magnetic strip are arranged in layers to provide passageways through which a liquid or gaseous media may pass;
  • FIGURE 5 illustrates one manner in which the permanent magnetic strip of FIGURE 1 may be magnetized to produce a highly efiicient filter.
  • FIGURE 1 shows apermanent magnetic strip 10 comprised of a flexible or resilient plastic material having dispersed therein particles of permanent magnetic material.
  • the plastic binder comprises any of the well-known synthetic resins e.g. polyethylene which will harden into a flexible mass.
  • the plastic binder may comprise natural rubber, neoprene, or the like.
  • the magnetic particles within the binder may be iron-barium oxide or other suitable permanent magnetic material having a very high coercivity and a very low permeability.
  • a characteristic of the magnetic strip formed from such magnetic particles dispersed throughout a plastic binder is that it may be magnetized with a plurality of north and south poles close spaced across one or more of its surfaces. Furthermore, the material may be magnetized with north and south poles extending parallel to its longitudinal surface or perpendicular thereto. In FIGURE 1, it will be noted that the material is magnetized along its length and parallel to its flat upper surface so that there is a north pole on one edge of the strip and a south pole on the other edge. Furthermore, the strip is magnetizedat spaced points across its width with reversed polarities. Extending across the width of the strip 10 are a plurality of spaced raised portions or lugs 12.
  • FIG- URE 2 By rolling a magnetic strip such as that shown in FIG- URE 1 into a spiral, the magnetic filter shown in FIG- URE 2 will result.
  • a housing 14 which comprises an outer cylindrical shell having rods or bars 16 extending across its opposite ends to retain the strip 10 therein.
  • the purpose of lugs 12 become apparent in FIGURE 2.
  • the lugs serve to separate successive turns of the spiral while leaving axially-extending passageways 18 through which a gaseous or liquid media may pass.
  • the magnetic particles within the media will, of course, be attracted to the magnetic poles on strip 19; while the fluid passes through passageways 18.
  • the surface of-the strip 10 should be as large as possible, and the fluid passing therethrough should move with the lowest possible speed to give the magnetically permeable particles within the fluid time to stick to the walls or surfaces of the strip ll).
  • the strip Ill will be removed from its housing and unrolled whereby the ferromagnetic particles or the like may be blown from the surface of the strip by compressed air or any other suitable means. After cleaning, the strip is again rolled into a spiral and inserted into its housing preparatory to another filtering operation.
  • FIGURE 3 another embodiment of the invention is shown wherein the magnetic strip of FIGURE 1 is cut into equal lengths which are piled one above the other to produce a layered effect wherein the lugs 12 provide passageways through which a gaseous or liquid media may pass.
  • the layered strips 10 are, like the embodiment of FIGURE 2, confined Within a housing 22 having bars or rods 24 at its opposite ends to retain the strips therein.
  • magnetic strips 25 are corrugated and arranged within a housing 26 similar to that of FIGURE 3 and having bars 28 at its opposite ends.
  • the crests of the corrugations will abut each other as at 30 to provide passageways 32 of maximum cross-sectional area through Which a liquid or gaseous media may pass.
  • the fiat or corrugated strips of FIGURES 3 and 4 may be taken out of their housings and cleaned with compressed air or any other suitable means after which they are ready for another filtering operation.
  • the housings containing the magnetic strips in FIGURES 2, 3 and 4 may be formed from iron, aluminum or brass, or they may be formed from a plastic material such as nylon or Tefion.
  • the bars at the opposite ends of the housings shown in FIGURES 24 are illustrated as an integral part thereof, it will be understood that in an actual installation the housing will be so constructed that a set of bars at one end of the housing may be removed to permit removal of the magnetic strips.
  • FIGURE 5 shows, in a greatly enlarged presentation, the path of the magnetic circuits between single plates 34, 3 6, 38 and 40 of a magnetic filter.
  • the plates or strips 34-40 are magnetized perpendicularly to their flat surfaces With north and south poles alternating across the surfaces of the strips.
  • Magnetic lines of flux 42 will come out of the north poles on plate 36 and go into the south poles on plate 34.
  • the magnetic lines of flux 44 have the opposite direction and come out of the north poles on strip 34 and travel into the south poles on strip 36.
  • the lines of fiux 46 and 48 come out of the north poles on plate 36 and go into the south poles of this same plate; while the lines 50 and 52 come out of the north poles of strip 34 and go into the south poles of the same plate.
  • a complete closed path is provided for the magnetic lines of flux.
  • the same situation is presented for the magnetic lines of flux 54 and 56. That is, the lines 54 will travel from the north pole at the center of strip 36 to the south pole on one side thereof; While the lines 56 will travel from this same north pole to the south pole on the other side thereof.
  • the resultant magnetic fields are. such that all ferromagnetic particles and the like Within a liquid or gaseous media passing through the filter will adhere to the strips 34-40 with great tenacity.
  • the magnetizing can be accomplished, for example, so that no alternating magnetic poles are present in a lengthwise direction. In this case, the field lines 54 and 56 will, of course, not occur. In addition, the magnetization may be accomplished to suit requirements so that magnetic poles are present on only one side of the strips 34-40. In this case, the magnetic lines of flux extending between the strips also will not occur.
  • An apparatus for filtering ferro-magnetic particles and the like from a fluid comprising superimposed, impervious layers of flexible material, said layer material comprising a flexible binder and particles of permanent magnetic material having a low permeability and a high coercivity in the order of the permeability and coercivity of iron-barium oxide dispersed within and bonded by said binder, each of said layers having a plurality of raised rib-like portions substantially integral with said layer and extending outwardly from at least one surface of said layer, a plurality of passageways defined between said rib-like portions for directing said fiuid along the surface of said layer between said rib-like portions and in substantially parallel flow paths, and said surface of said layer between said rib-like portions being substantially fiat and continuous and having at least one pair of north and south magnetic poles magnetized to produce flux lines that extend outwardly from said surface between said rib-like portions to form a high density flux field in said passageways with the flow of said fiuid in said passageways being substantially per

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Separating Particles In Gases By Inertia (AREA)
US67987A 1959-12-12 1960-11-08 Magnetic filter Expired - Lifetime US3136720A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB55898A DE1183191B (de) 1959-12-12 1959-12-12 Dauermagnetisch erregtes Filter fuer gasfoermige oder fluessige Medien

Publications (1)

Publication Number Publication Date
US3136720A true US3136720A (en) 1964-06-09

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Family Applications (1)

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US67987A Expired - Lifetime US3136720A (en) 1959-12-12 1960-11-08 Magnetic filter

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US (1) US3136720A (de)
CH (1) CH393606A (de)
DE (1) DE1183191B (de)
GB (1) GB912249A (de)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3343676A (en) * 1964-04-23 1967-09-26 Philips Corp Magnetic filter
US3345594A (en) * 1967-10-03 Magnetic device for treating a liquid
US3346116A (en) * 1962-05-22 1967-10-10 Quebec Smelting & Refining Ltd Magnetic separators
US3657119A (en) * 1970-05-22 1972-04-18 Joseph E Turbeville Pollution control device
US3753183A (en) * 1972-06-21 1973-08-14 Sperry Rand Corp Method of forming a magnetized helical coil
US4144163A (en) * 1975-06-05 1979-03-13 Sala Magnetics, Inc. Magnetodensity separation method and apparatus
US4201827A (en) * 1976-11-25 1980-05-06 Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftung Magnetically supported particle matrix for accumulating or affecting substances dissolved or finely dispersed in a liquid or gas
US4206000A (en) * 1978-11-21 1980-06-03 Western Electric Company, Inc. Method and apparatus for filtering magnetic debris out of work-functioning baths
US4234420A (en) * 1979-05-03 1980-11-18 Turbeville Joseph E Method and apparatus for pollutant spill control
US4279748A (en) * 1978-03-08 1981-07-21 Inoue-Japax Research Incorporated High-field gradient magnetic separator
US4309290A (en) * 1976-11-25 1982-01-05 Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftung Magnetically supported particle matrix for accumulating or affecting substances dissolved or finally dispersed in liquids or gas
US4375407A (en) * 1981-06-22 1983-03-01 The Franklin Institute High gradient magnetic separation device
US4528096A (en) * 1979-07-20 1985-07-09 Siemens Aktiengesellschaft Device for high gradient magnetic separation
US4961849A (en) * 1988-12-19 1990-10-09 Hull Harold L Magnetically attached filter
US5468529A (en) * 1992-08-28 1995-11-21 Korea Institute Of Science And Technology Magnetic filter material comprising a self-bonding nonwoven fabric of continuous thermoplastic fibers and magnetic particulate within the fibers
US5514340A (en) * 1994-01-24 1996-05-07 Magnetix Biotechnology, Inc. Device for separating magnetically labelled cells
US5525145A (en) * 1993-12-17 1996-06-11 Hodge; Joseph Filtering apparatus for a forced air duct grill
US5690719A (en) * 1995-10-19 1997-11-25 Hodge; Joseph Removable filter for a forced air duct grill
US6139737A (en) * 1998-09-04 2000-10-31 Spx Corporation Transmission fluid filter having a ferrite-filled nylon magnetic body
US20040175289A1 (en) * 2003-03-06 2004-09-09 Olympus Corporation Device and method for retrieving medical capsule
US20100133163A1 (en) * 2007-09-20 2010-06-03 Southern Taiwan University Magnetic filtering film
US20110094956A1 (en) * 2009-10-22 2011-04-28 Bay 6 Solutions Inc. Filter elements
US10076734B2 (en) 2014-05-02 2018-09-18 Aerspun LTD Method and apparatus for capturing mixing bar
US10357577B2 (en) 2010-07-16 2019-07-23 Auckland Uniservices Limited Bacterial nitroreductase enzymes and methods relating thereto

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462720A (en) * 1967-02-14 1969-08-19 Saburo Miyata Magnetic assembly for filtering
DE3231929A1 (de) * 1982-08-27 1984-03-01 Robert Bosch Gmbh, 7000 Stuttgart Fluessigkeitsfilter
GB8420668D0 (en) * 1984-08-14 1984-09-19 Int Research & Dev Co Ltd Magnetic filter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2074085A (en) * 1935-05-20 1937-03-16 Samuel G Frantz Magnetic separator
US2816665A (en) * 1954-08-16 1957-12-17 Purolator Products Inc Wound filter element
US2893561A (en) * 1958-03-07 1959-07-07 Fram Corp Magnetic filter elements
US2999275A (en) * 1958-07-15 1961-09-12 Leyman Corp Mechanical orientation of magnetically anisotropic particles
US3024392A (en) * 1954-08-27 1962-03-06 Baermann Max Process for the manufacture of plastic bound permanent magnets
US3051988A (en) * 1957-02-09 1962-09-04 Baermann Max Material with permanent magnetic properties

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE580533C (de) * 1930-05-18 1933-07-12 Siemens & Halske Akt Ges Magnetisierbarer Kern, insbesondere fuer Fernmeldezwecke
GB480586A (en) * 1935-05-20 1938-02-21 Samuel Gibson Frantz Improvements in and relating to magnetic separators
AT169881B (de) * 1949-08-22 1951-12-27 Spodig Heinrich Rostförmiger Magnetscheider auf permanentmagnetischer Grundlage
GB676487A (en) * 1950-06-15 1952-07-30 Samuel G Frantz Improvements in magnetic separators
DE1781718U (de) * 1957-02-09 1959-01-22 Max Baermann Auf einer ferromagnetischen unterlage haftende profilleiste.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2074085A (en) * 1935-05-20 1937-03-16 Samuel G Frantz Magnetic separator
US2816665A (en) * 1954-08-16 1957-12-17 Purolator Products Inc Wound filter element
US3024392A (en) * 1954-08-27 1962-03-06 Baermann Max Process for the manufacture of plastic bound permanent magnets
US3051988A (en) * 1957-02-09 1962-09-04 Baermann Max Material with permanent magnetic properties
US2893561A (en) * 1958-03-07 1959-07-07 Fram Corp Magnetic filter elements
US2999275A (en) * 1958-07-15 1961-09-12 Leyman Corp Mechanical orientation of magnetically anisotropic particles

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3345594A (en) * 1967-10-03 Magnetic device for treating a liquid
US3346116A (en) * 1962-05-22 1967-10-10 Quebec Smelting & Refining Ltd Magnetic separators
US3343676A (en) * 1964-04-23 1967-09-26 Philips Corp Magnetic filter
US3657119A (en) * 1970-05-22 1972-04-18 Joseph E Turbeville Pollution control device
US3753183A (en) * 1972-06-21 1973-08-14 Sperry Rand Corp Method of forming a magnetized helical coil
US4144163A (en) * 1975-06-05 1979-03-13 Sala Magnetics, Inc. Magnetodensity separation method and apparatus
US4201827A (en) * 1976-11-25 1980-05-06 Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftung Magnetically supported particle matrix for accumulating or affecting substances dissolved or finely dispersed in a liquid or gas
US4309290A (en) * 1976-11-25 1982-01-05 Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftung Magnetically supported particle matrix for accumulating or affecting substances dissolved or finally dispersed in liquids or gas
US4279748A (en) * 1978-03-08 1981-07-21 Inoue-Japax Research Incorporated High-field gradient magnetic separator
US4206000A (en) * 1978-11-21 1980-06-03 Western Electric Company, Inc. Method and apparatus for filtering magnetic debris out of work-functioning baths
US4234420A (en) * 1979-05-03 1980-11-18 Turbeville Joseph E Method and apparatus for pollutant spill control
US4528096A (en) * 1979-07-20 1985-07-09 Siemens Aktiengesellschaft Device for high gradient magnetic separation
US4375407A (en) * 1981-06-22 1983-03-01 The Franklin Institute High gradient magnetic separation device
US4961849A (en) * 1988-12-19 1990-10-09 Hull Harold L Magnetically attached filter
US5468529A (en) * 1992-08-28 1995-11-21 Korea Institute Of Science And Technology Magnetic filter material comprising a self-bonding nonwoven fabric of continuous thermoplastic fibers and magnetic particulate within the fibers
US5525145A (en) * 1993-12-17 1996-06-11 Hodge; Joseph Filtering apparatus for a forced air duct grill
US5514340A (en) * 1994-01-24 1996-05-07 Magnetix Biotechnology, Inc. Device for separating magnetically labelled cells
US5690719A (en) * 1995-10-19 1997-11-25 Hodge; Joseph Removable filter for a forced air duct grill
US6139737A (en) * 1998-09-04 2000-10-31 Spx Corporation Transmission fluid filter having a ferrite-filled nylon magnetic body
US20040175289A1 (en) * 2003-03-06 2004-09-09 Olympus Corporation Device and method for retrieving medical capsule
US20090326514A1 (en) * 2003-03-06 2009-12-31 Olympus Corporation Device and method for retrieving medical capsule
US20100133163A1 (en) * 2007-09-20 2010-06-03 Southern Taiwan University Magnetic filtering film
US7943042B2 (en) * 2007-09-20 2011-05-17 Southern Taiwan University Magnetic filtering film
US20110094956A1 (en) * 2009-10-22 2011-04-28 Bay 6 Solutions Inc. Filter elements
US8845893B2 (en) * 2009-10-22 2014-09-30 Bay 6 Solutions Inc. Filter elements
US10357577B2 (en) 2010-07-16 2019-07-23 Auckland Uniservices Limited Bacterial nitroreductase enzymes and methods relating thereto
US10076734B2 (en) 2014-05-02 2018-09-18 Aerspun LTD Method and apparatus for capturing mixing bar

Also Published As

Publication number Publication date
DE1183191B (de) 1964-12-10
GB912249A (en) 1962-12-05
CH393606A (de) 1965-06-15

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