US3063222A - Air filter apparatus - Google Patents

Air filter apparatus Download PDF

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Publication number
US3063222A
US3063222A US51813A US5181360A US3063222A US 3063222 A US3063222 A US 3063222A US 51813 A US51813 A US 51813A US 5181360 A US5181360 A US 5181360A US 3063222 A US3063222 A US 3063222A
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US
United States
Prior art keywords
web
air
members
medium
filter
Prior art date
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
US51813A
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English (en)
Inventor
Willem J Hagendoorn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
American Air Filter Co Inc
Original Assignee
American Air Filter Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by American Air Filter Co Inc filed Critical American Air Filter Co Inc
Priority to US51813A priority Critical patent/US3063222A/en
Priority to GB30313/61A priority patent/GB976152A/en
Priority to DEA38186A priority patent/DE1293007B/de
Priority to FR871613A priority patent/FR1298693A/fr
Application granted granted Critical
Publication of US3063222A publication Critical patent/US3063222A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B01D46/18—Particle separators, e.g. dust precipitators, using filtering belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters

Definitions

  • This invention relates generally to automatic air filters of the disposable medium type employing, as an air filtering medium, a flexible, elongate, relatively thick, resilient web adapted to be progressively moved into and through an air stream aperture. More specifically, the invention deals with the provision of means, in connection with such filters, for restraining lateral displacement and width distortion of the air cleaning web in the air stream, both during movement of the web and while it is stationary.
  • the improved means to restrain lateral shifting and width distortion of the web are spaced inwardly some distance from the means which provide the seal for the edges of the medium.
  • the invention is based on the proposition that with the rather thick, resilient webs used in such filters, superior results in keeping the web in a proper position, both during longitudinal advance and while stationary, can be obtained by divorcing the functions of sealing the longitudinal edges of the web, and restraining lateral displacement of the web. Consequently, the means for sealing the edges of the web against air flow therearound are retained but additional means are provided in spaced relation therefrom to prevent lateral displacement of the web.
  • these additional means comprise a semi-cylindrical hollow member mounted adjacent to and in engaging relation with one face of the web in the air stream, and a cooperating member on the opposite face of the web adapted to be moved into and held in generally nesting relationship with the concave side of the hollow member in spaced relation therefrom so as to substantially compress therebetween a longitudinally extending strip of web.
  • the leading or web entry ends of these members i.e., the ends between which the web first passes as it is advanced
  • FIGURE 1 is a partly broken, somewhat diagrammatic elevational view of a horizontally arranged filter including the inventive apparatus;
  • FIGURE 2 is a somewhat diagrammatic plan view of the apparatus of FIGURE 1;
  • FIGURE 3 is a fragmentary perspective view of one embodiment of the appaartus of the invention.
  • FIGURE 4 is a vertical sectional view taken along the line 44- of FIGURE 1;
  • FIGURE 5 is a somewhat diagrammatic elevational view of a vertically disposed filter utilizing the inventive apparatus along both side portions of the air stream aperture.
  • FIGURES 1 and 2 illustrate one example of a roll type filter horizontally arranged with a supply roll 2 of air cleaning medium or web in tightly wound form mounted in the right end section 4 from which the web is advanced incrementally from time-to-time into and through the central section 6 framing the air stream aperture, the web designated by the numeral 8 in the air stream assuming its expanded thickness form in the air stream.
  • the web 8 is progressively advanced through the central section and filters air borne contaminants from the air stream, it is correspondingly progressively advanced into the left end section 10 wherein it is tightly wound into a discharge roll 12 which is ultimately thrown away or reconditioned.
  • the central section 6 is framed along the top and bottom by oppositely disposed channel elements 14 and 16 respectively secured at their ends to the end sections 4 and 10.
  • a web edge air seal channel 18 having a width corresponding approximately to the expanded thickness of the web is mounted to extend longitudinally along the inner surface of each of the frame members 14 and 16 (only the upper one shown in FIGURE 3) in inwardly open relationship to receive the extreme longitudinal margins of the web in the central section.
  • the channels 18 serve as seals along the longitudinal margins of the web to prevent the flow of dirty air therearound.
  • front and rear wires or small diameter rods 20 and 21 secured at their opposite ends adjacent the respective end sections are disposed to extend longitudinally along the front and rear faces of the web.
  • the front wires 20 extending along the front face of the web are appropriately spaced from each other across the width of the web, and are spaced from the corresponding rear wires 21 a distance corresponding approximately to the resiliently expanded thickness of the web.
  • Such support wires are conventional, and further detail as to the mounting arrangement, etc., is not deemed necessary.
  • One or more stiffening members extending in a widthwise direction relative to the direction of medium advance in the center section may be provided along the front and rear of the center section to maintain the spacing between the upper and lower frame members 14 and 16 and to stiffen the center section.
  • These members which may be in the form of front and rear tubes 22 and 23, are secured at their upper and lower ends in brackets 24 mounted along the front and rear edges of the center section forming channels 14 and 16.
  • a semicylindrical member 26 which may be conveniently made by cutting a piece of conduit or tubing along its longitudinal axis, has one end flattened and formed as illustrated in FIGURE 3 to include a portion 28 flared radially outwardly.
  • the member 26 is mounted with its open side having a concave surface engaging the rear face of the web with its flared portion 28 directed toward the supply roll end of the filter apparatus and with its longitudinal axis substantially parallel with the center section framing members 14 and 16 and consequently parallel to the direction of web travel.
  • the member 26 may be conveniently mounted in this disposition by securing a block 30 to the outer curved surface of the member at an intermediate location therealong and then mounting the block on a rear tube 23.
  • the opposing member positioned to engage the front face of the web preferably takes the form of a smaller diameter elongate rod 32 having its leading end 34, opposite the fiared portion 28 of member 26, bent into a shape similar to the leading end of a sled runner.
  • This rod 32 is mounted by suitable means, such as the metal straps 36, to a front tube 22 so that when the rod 32 is in operative position it is substantially nested within the concave space formed by member 26 and leaves a narrow U-shaped space between the members.
  • the semi-cylindrical rear member 26 and opposing front member 32 which may be collectively termed a runner set, are spaced downwardly from the upper channel a sufficient distance that a considerable lateral displacement of the web downwardly would be required for the upper longitudinal edge of the web to approach the runner set, but is not spaced downwardly a distance which would leave suflicient web to sag or droop from its weight plus the weight of the dirt load.
  • the runner set may be spaced downwardly about 3 to 8 inches below the bight of the edge sealing channel 18 with quite satisfactory results in service.
  • the runner set may be even lower so long as the web above the runner set does not sag. The exact spacing for satisfactory results obviously depends to some extent upon the sagging characteristics of the web itself.
  • FIGURE 4 illustrates the cross sectional configuration which the web assumes as it passes along and between the opposed members forming a runner set.
  • the rod 32 is nested within the half conduit 26 with their axes substantially aligned with the spacing between the opposed concave and convex surfaces of the respective members being equidistant throughout.
  • the spacing which may be employed between the opposed members in relation to the thickness of the medium with a glass fiber web of the type formed in practicing the process disclosed in Jackson U.S. Patent 2,798,531 and resulting in a web of about 2 /2 to 3 inches in its resiliently expanded form, the members may be arranged to provide a /2 inch open space between the opposed surfaces.
  • the exact spacing is subject to some variance depending upon the resiliency of the particular medium involved; with a stiffer medium (often due in part to variations in the binder material used to bond the glass fibers to each other in the web), the spacing may be increased.
  • the front runner 32 is secured to a front rod 22 which is pivot;
  • the corresponding upper bracket 24 is adapted to receive a pin 38 which can be removed therefrom to release the upper end of front tube 22 when desired, and can then be inserted to again secure the upper end when new web has been installed in the filter apparatus and it is desirable to again position the rod 32 to squeeze the strip of web within the runner set.
  • FIGURE 2 shows a horizontal filter apparatus em ploying only one runner set for the entire length of the filter. While this has been found to be sufficient in connection with the dimensions of most such filters now employed and in view of the character of most media now employed, it will be appreciated that several such runner sets can be used at longitudinally spaced locations; or that one runner set of extended length can be used.
  • a vertically arranged filter commonly has a medium supply section 40 at the top, a used medium discharge section 42 at the bottom, and an air stream aperture 44 defined along the vertical edges by inwardly open channels 46 for sealing the vertical edges of the medium against dirty air flow therearound.
  • the usual upstream and downstream rods 43 are provided to support the medium 50 against displacement in the normal and reverse directions of air flow.
  • a set of runners or guides 52 is mounted near each vertical side of the filter, generally as shown in FIGURE 5, so that the tendency of the medium to neck in from the vertical side seals 46 is resisted.
  • the general form of the front and rear elements of the runner set 52 is as illustrated in FIGURE 3 with the outwardly flared portions of the elements being at the upper end, i.e., being closer to the supply section 40.
  • the two front rods of the runner sets 52 are mounted on a detachable cross rod 54 so that new medium may be inserted into the apparatus more easily.
  • inwardly directed flange means along the opposite longitudinal edges of said aperture for engaging, in lapping relationship, the opposite longitudinal margins of said web to prevent the fiow of uncleaned air there around; means for restraining said web against lateral displacement in said aperture including opposing members disposed on opposite faces of said web to engage an elongate narrow strip of web therebetween in a generally trough-shaped substantially compressed condition; means mounting said opposing members in parallel, closely spaced relation with their axes generally parallel to the direction of web travel, and adjacent to but spaced from said aperture longitudinal edge a distance greater than the resiliently expanded thickness of said web, said mounting means including means maintaining said opposing members in fixed engaging relation with said web both while it is being advanced and while stationary.
  • air flow seal means in the form of inwardly open channel members along the opposite longitudinal edges of said air stream aperture, said channel members having a width approximately equal to the resiliently expanded thickness of said Web so that the longitudinal margins of said web are received therein and are longitudinally shiftable therewith without any substantial compression thereof; separate means for restraining lateral displacement of said web in said aperture including at least a pair of opposing members disposed to engage opposite faces of said web and to substantially compress an elongate, narrow strip of said web in generally pleated form; mounting means for securing said separate means in spaced, generally parallel relation to said air flow seal means with the expanse of resiliently expanded web between said narrow compressed strip and the adjacent air flow seal means being greater than the resiliently expanded thickness of said web, said mounting means including means maintaining said spacing of said opposing members both while said web is being advanced and while stationary.
  • said mounting means include separate mounting means for said opposing members, and at least one of said mounting means is releasably secured relative to the other.
  • said opposing members comprise an elongate hollow, semi-cylindrical member disposed with its open side forming a concave space in engaging relationship with one face of said web, and an element having a side forming a convex surface of reduced diameter relative to said concave space disposed on the opposite face of said web and adapted to be placed in substantially nesting relation with said hollow member to form a curved space therebetween for compressing said web to a minor portion of its resiliently expanded thickness.
  • said opposing members include end portions directed away from the respective faces of said web at the web entry ends for providing progressive compression of said web as it is advanced into engaging relation therewith.
  • inwardly directed flange means along the opposite longitudinal edges of said aperture for engaging, in lapping relationship, the opposite longitudinal margins of said web to prevent the flow of uncleaned air therearound; means for restraining said web against lateral displacement in said aperture including a trough-shaped hollow member and an element of sufficiently reduced crossed section relative to said hollow member to permit substantial nesting therewithin to form a narrow passage of generally sinuous cross-section therebetween; means mounting said restraining means with its axis extending generally in the direction of web travel, adjacent to but spaced a distance greater than the resiliently expanded thickness of said web from one of said aperture longitudinal edges, and with said hollow member and element engaging opposite faces of said web to compress a narrow strip of web therebetween to a minor portion of its resiliently expanded thickness.
  • said troughshaped hollow member includes an interior surface of semi-circular shape.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtering Materials (AREA)
US51813A 1960-08-25 1960-08-25 Air filter apparatus Expired - Lifetime US3063222A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US51813A US3063222A (en) 1960-08-25 1960-08-25 Air filter apparatus
GB30313/61A GB976152A (en) 1960-08-25 1961-08-22 Improvements in or relating to air cleaning devices
DEA38186A DE1293007B (de) 1960-08-25 1961-08-25 Wanderband-Luftfilter mit Vorratsrolle und Aufnahmerolle fuer das Filterband
FR871613A FR1298693A (fr) 1960-08-25 1961-08-25 Filtre à air

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US51813A US3063222A (en) 1960-08-25 1960-08-25 Air filter apparatus

Publications (1)

Publication Number Publication Date
US3063222A true US3063222A (en) 1962-11-13

Family

ID=21973514

Family Applications (1)

Application Number Title Priority Date Filing Date
US51813A Expired - Lifetime US3063222A (en) 1960-08-25 1960-08-25 Air filter apparatus

Country Status (4)

Country Link
US (1) US3063222A (fr)
DE (1) DE1293007B (fr)
FR (1) FR1298693A (fr)
GB (1) GB976152A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3216183A (en) * 1961-12-28 1965-11-09 Svenska Flaektfabriken Ab Device for filtering air in spraypainting booths
US5217513A (en) * 1992-05-11 1993-06-08 Armbruster Joseph M Air filter assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB700352A (en) * 1950-04-26 1953-12-02 Eric Victor Giles Improvements in or relating to the separation of dust from air or other gases
US2763139A (en) * 1954-03-10 1956-09-18 Magic Chef Inc Room air conditioner filter system
US2807330A (en) * 1954-08-04 1957-09-24 American Air Filter Co Method and apparatus for filtering air
US2850113A (en) * 1955-07-11 1958-09-02 Koppers Co Inc Air filter
US2869680A (en) * 1957-09-30 1959-01-20 Westinghouse Electric Corp Gas filter mats
US2963112A (en) * 1956-05-03 1960-12-06 Green Fuel Economizer Co Inc Automatic air filter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1711865U (de) * 1955-07-28 1955-12-01 Concordia Elek Zitaets Ag Trockenfilter.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB700352A (en) * 1950-04-26 1953-12-02 Eric Victor Giles Improvements in or relating to the separation of dust from air or other gases
US2763139A (en) * 1954-03-10 1956-09-18 Magic Chef Inc Room air conditioner filter system
US2807330A (en) * 1954-08-04 1957-09-24 American Air Filter Co Method and apparatus for filtering air
US2850113A (en) * 1955-07-11 1958-09-02 Koppers Co Inc Air filter
US2963112A (en) * 1956-05-03 1960-12-06 Green Fuel Economizer Co Inc Automatic air filter
US2869680A (en) * 1957-09-30 1959-01-20 Westinghouse Electric Corp Gas filter mats

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3216183A (en) * 1961-12-28 1965-11-09 Svenska Flaektfabriken Ab Device for filtering air in spraypainting booths
US5217513A (en) * 1992-05-11 1993-06-08 Armbruster Joseph M Air filter assembly

Also Published As

Publication number Publication date
GB976152A (en) 1964-11-25
FR1298693A (fr) 1962-07-13
DE1293007B (de) 1969-04-17

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