Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2664172 A
Publication typeGrant
Publication dateDec 29, 1953
Filing dateJun 7, 1951
Priority dateJun 7, 1951
Publication numberUS 2664172 A, US 2664172A, US-A-2664172, US2664172 A, US2664172A
InventorsCharles E Butterfield
Original AssigneeOwens Corning Fiberglass Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Air filter construction
US 2664172 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

De@ 29, 1953 c. E. BUTTERFIELD 2,664,172

AIR FILTER CONSTRUCTION Filed June '7, 1951 Fim.


Patented v Dec. 29, 1953 UNITED sfr-Afrfsrfs regresa* loriucii FILTER CONSTRUCTION "Dharles .f-Butter'field, Newark, -i0hio, :assigner otoLOwens-CorningFiherglascornorationsagcorporationofsDielaware .systems usually consist in .masses of .heteron .geneously .arranged fibers, lfor .-example, rock -wool-.or `glass iibers, .assembled in a relatively thin-.loosely packed, mass,:usually of rectangular y-s'hapewhich are inserted, in theV air passageways of l'heating or air conditioning-systemsfor the .purpose of filtering out `dust which -otherwise would be carried back into the space being heated or conditioned. Because the masses of fibers have to be quite loose, it is necessary that they be bound in some kind of frame or package to hold them together, protect them during manufacture, packaging, shipping, storage and handling and to support them in the passageways.

It is the principal object of this invention to provide a simplied, easily assembled ber retaining means for an air filter which has sufllcient strength not only to hold the fibers in place during use but to form a package during shipment and storage of the filter.

The package constituting the invention comprises two generally flat perforated grills, one to be located on each of the major faces of a mass of loosely packed bers and each of the grills having flanges bent over around the edges of the mass inwardly toward the flanges of the other grill; the whole being made unitary and retained in assembled construction by a single web, preferably formed of a textile tape, which is folded and adhered around the edges of the grill flanges.

An air lter embodying the invention is shown in the attached drawings, in which:

Fig. 1 is a view in perspective of an assembled air filter constructed according to the invention.

Fig. 2 is a greatly enlarged fragmentary, vertical, sectional View taken substantially on the line 2--2 of Fig. 1.

Fig. 3 is a fragmentary perspective view, partly in section, taken substantially along the line 3-3 of Fig. 1.

Fig. 4 is a fragmentary vertical sectional view of a filter construction illustrating a modification of the invention.

An air lter consists in one or more masses of loosely compacted bers I which usually are formed in layers either one or two inches thick and have generally rectilinear shapes. Each of the masses of bers has major, fiat, parallel faces `I.I1"an'd.I2z-over each'nf' which there-'is laid @a `perforated fmetal grill I3 or I4, respectively. In 'the f embodiment of -the i invention shown, the "perforatedmetalrgrills have a plurality of Ycircu- 'lar-openings ithrough .which air passes, leaving structural support for the filter.

In an air-'lter'package or construction accordfingltothe inventionyeachofthe'grills I3 and I4 iszformedwith"inwardly extending ilat flanges I5 or I6 which are'bentpn all fourfsides to form a shallow pan-like structure. In thef'embodb -nient ofthe' invention shown'in the drawings, a "lterfcomprising two "thin wafers of fibers I0 is "shownin'assembled condition. `In making each of these semi-filters the mass of bers IG is laid in the shallow pan-like structure formed by a grill I4 and its bent ilanges I5 or IIB and then the ends of the flanges are bent over to form lips I 'I or I 8 generally parallel to the major planes of the grills I3 or I4.

The two pan-like structures comprising the grills I3 and I4 and the masses of bers I0 are then placed together with the open faces adjacent, the two being assembled particularly as shown in section in Fig. 2. In order to retain the structures in assembled condition and to give the assembled lters unity, a wide fiber reinforced adhesive tape I9 is wrapped around the edges of the two flanges I5 and I6 and its wings are folded over the top and bottom forming a frame around the grills I3 and I4 and retaining the two is assembled condition. The tape I9 may be mitered or lapped at the corners as shown in Fig. 3 and the whole pressed tightly against the material of which the grills I3 and I4 are formed.

Although the grills I3 and I4 are indicated as being made from perforated metal, other ma terials such as thin fiber board or cardboard or other reltively still, tough perforated sheet material. may also satisfactorily be employed.

The embodiment of the invention illustrated in Figs. 1, 2 and 3 consists of two masses of fibers III and their associated grills I3 and I so that the nal finished lter is double thickness. In some applications, single thickness filters may be employed, in which case one of the shallow pan-like structures made up of a grill I3a having flanges I5a is filled with a mass of fibers Illa and a second grill I4a may then either be laid over the open side of the pan shaped structure or it may be formed slightly larger and telescoped over the open side of the pan. Such a construction is illustrated in Fig. 4 Where a grill I4a is shown as having a flange Isa which slides over the exterior of the flange I5a of the grill I3a, the major face of the grill I4@ lying against the exterior of a lip Ha formed on the ange of the grill I3a. As in the embodiment of the invention illustrated in Figs. l, 2 and 3, an adhesive tape I9a which preferably is liber reinforced, is pressed around the edges of the flanges Ia and 16a to retain the two grills I3a and Illa around the mass of fibers Ia.

An air filter construction embodyingr the invention eliminates the necessity for stapling or otherwise mechanically securing the facing grills I3 and I4 or similar elements to each other and the use of flanges formed directly from the same material as that forming the grill faces themselves eliminates the use of expensive framing materials such as are presently employed in most commercial air lters as Well as greatly strengthening the assembled structure.

The particular materials employed for fabricating any of the elements of a grill constructed according to the invention are not critical, it being only necessary that they have suilcient strength and, preferably, light Weight, to retain the ber masses in place during handling and shipping and to hold them generally across the passageway of the air circulating system in which they are employed without greatly interfering with the flow of air or unnecessarily weighting or bulking the completed air filter.

I claim:

1. A lter construction unit consisting of a generally at mat of fibers, said mat having .generally parallel and planar major faces and edges generally perpendicular to such major faces and a retainer for such mat consisting in a thin perforated grill having a flat body overlying one major face of said mat, marginal ilanges extending generally perpendicularly to said body and embracing all of the edges of said mat and return lips extending inwardly over the margins of the other major face of said mat generally parallel to said flat body.

2. An air lter comprising a filter construction unit according to claim 1, a closing cover consisting in a flat, perforated main face and edge flanges perpendicular to said face and arranged in telescoping overlying relation to the flanges of said unit and means for attaching said cover to said unit.

3. An air lter comprising a pair of lter construction units according to claim 1 arranged in back to back relationship with the return lips of each unit in contact and means for securing said units in assembledrelationship.


References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,008,751 Davies July 23, 1935 2,044,221 Myers et al June 16, 1936 2,062,090 Gaarder et al. Nov. 24, 1936 2,108,283 Drew et al. Feb. 15, 1938 2,160,003 Slayter et al May 30, 1939 2,513,946 Kliefoth July 4, 1950 2,569,575 Philipps Oct. 2, 1951

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2008751 *Feb 3, 1933Jul 23, 1935Davies CharlesFilter
US2044221 *Jan 29, 1934Jun 16, 1936Owens Illinois Glass CoFramework for air filters
US2062090 *Nov 4, 1935Nov 24, 1936Wilson & Co IncAir filter
US2108283 *May 18, 1935Feb 15, 1938Plymouth Cordage CoAir conditioning device
US2160003 *Sep 14, 1931May 30, 1939Owens Corning Fiberglass CorpAir filter
US2513946 *Oct 2, 1946Jul 4, 1950Res Prod CorpFilter apparatus
US2569575 *Mar 5, 1948Oct 2, 1951Owens Corning Fiberglass CorpAir filter
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2715453 *Jun 21, 1952Aug 16, 1955Air Filters CompanyAir filter unit
US2852094 *Jan 22, 1957Sep 16, 1958Iii William Stephen SawleCasings for air filters
US2871977 *Dec 12, 1955Feb 3, 1959Fred E KlingHot gas filters
US2877863 *Sep 7, 1956Mar 17, 1959Lurie Benjamin LAir filter
US3509696 *Oct 18, 1967May 5, 1970Carrier CorpCollector assembly for electrostatic air precipitators
US3970440 *Jun 6, 1974Jul 20, 1976United States Gypsum CompanyCompact air filter
US4865637 *Sep 21, 1988Sep 12, 1989Gruber Thomas JFilter cartridge
US8277530Apr 27, 2009Oct 2, 2012Ellis Fibre UsaGrease removal apparatus, systems and methods
US8652241Sep 13, 2012Feb 18, 2014Ellis Fibre UsaGrease removal apparatus, systems and methods
US9242200 *Feb 17, 2014Jan 26, 2016Ellis Fibre UsaGrease removal apparatus, systems and methods
US20090087233 *Sep 12, 2008Apr 2, 2009Ricoh Printing Systems, Ltd.Belt unit and image forming apparatus using the same
US20100071324 *Apr 27, 2009Mar 25, 2010Glenn David AlexanderGrease Removal Apparatus, Systems and Methods
US20100071326 *Sep 23, 2009Mar 25, 2010Glenn David AlexanderFlame Resistant Filter Apparatus and Method
US20100071327 *Mar 25, 2010Glenn David AlexanderFlame Resistant Viscose Filter Apparatus and Method
US20140157739 *Feb 17, 2014Jun 12, 2014Glenn David AlexanderGrease Removal Apparatus, Systems and Methods
WO2010036687A3 *Sep 23, 2009Aug 26, 2010Clean Systems LlcGrease collecting filter assembly and method of fabrication thereof
U.S. Classification55/517, 55/DIG.310
International ClassificationF24F13/28, B01D46/10
Cooperative ClassificationB01D46/10, Y10S55/31, F24F13/28
European ClassificationF24F13/28, B01D46/10