US1890499A - Filter - Google Patents

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US1890499A
US1890499A US577177A US57717731A US1890499A US 1890499 A US1890499 A US 1890499A US 577177 A US577177 A US 577177A US 57717731 A US57717731 A US 57717731A US 1890499 A US1890499 A US 1890499A
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United States
Prior art keywords
filter
folds
edges
spread
edge
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Expired - Lifetime
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US577177A
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Davies Charles
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Individual
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Individual
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B01D46/522Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with specific folds, e.g. having different lengths
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2275/00Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/20Shape of filtering material
    • B01D2275/203Shapes flexible in their geometry, e.g. bendable, adjustable to a certain size
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00Gas separation
    • Y10S55/31Filter frame

Definitions

  • 'Ihis invention relates to filters intendedl curved or bent in shape, the former suffers the inconvenience of complications 1n pack-V ing and shipping and the latter the difficulty of handling.
  • the main object of my invention therefore is to provide a flexible corrugated filter which shall have means' to retain the individual cori rugations in regular sequence.
  • Another object of my invention is to provide a filter which may be manufactured and packed in a standard manner and yet be adaptable to a wide range of conditions of use.
  • Fig. 1 is a front elevational view of a filter insert according to my invention.
  • Fig. 2 is a detail in front elevation similar to Fig. 1 and showing a slight modification
  • Fig. 3 is a side elevation of a part of Fig. 1, portions being broken away.
  • Fig. 4 is a view similar to Fig. 3 but show- 40 ing the filter bent or flexed as in use.
  • the filter embodying my invention also embodies preferably certain Vof the features shown in'my co-pending application for lters Serial No. 471,317 led July 28, 1930 and comprises a main ltering body 1 of fibrous material such as cellulose, supported and held between an entrance surface sheet 2 of sized, reticulated textile material or other similar semi-stiff reticulated mate- '50 rial, and an exit surface sheet of fuzzy ⁇ material of a textile nature. The assemblyl of cellulose and surface sheets is then pleated vor folded to form a spaced series of zlg-zags or corrugations 4.
  • the ends of individual corrugations or folds are then crushed or mashed as at 5 to form flattened, spread end portions which overlap to provide a plane edge or rim 6 for the filter.
  • the edges may then be stapled or stitched, and covered with felt strips; but preferably a strip of cloth, felt or other flexible inextensible material is folded over the edge as ⁇ at 7 and stitched thereto as in Fig. 1 at 8, or stapled thereto as in'Fig. 2 at 8.
  • the edging 7 l may be secured to 35 the edge 6 in any other manner'withont de-4 parting from the principles of this invention.
  • the ed ing 7 may be run around the four edges o the filter for convenience and simplicity of manufacture as shown in Fig. 1 but 70 it is clear that it may be replaced at what may be called the upper and lower edges 9 and l() by a relatively rigid strip of cardboard or other material.
  • the ends ofthe ridges or folds on each side of the filter are fiattened to a line midway between the crests of the folds on one side and the crests of the folds on the other side; so that the fltersurface extends e ually on either side of the rim 6.
  • the sprea flattened edges of successive folds on one side of the filter are overlapped, 'and the spread, flattenededges of successive folds on the other side of the filter are also overlapped.
  • the overlap of the edges of two consecutive folds on one side of the filter will come opposite the Continuous fiat edge portion that fold on the other side of the filter which corre- .90
  • the preferred embodiment shown in Fig. r, 1 is a unit with sufficient rigidity of form to 9" permit convenient handling. At the same time it may be easily bent or flexed about a horizontal axis as the conditions of use may req11ire. In such case the individual folds or corrugations will be held-in definite sequen- 10 opt tial relation by the lateral connectors or ties 7 which prevent the escape or wide separation of the said folds.
  • the strips 7 may be replaced by strips of similar inextenszible flexible material attached to and running transversely of the corrugations and intermediate the lateral edges of the filter.
  • the preferred form has animportantadvantage in most cases of actual use.
  • edge portion of the filter By reducing the edge portion of the filter to a fiat surface or rim with a rectilinear edge the possibility of'air leakage about the edges of the filter is necessarily reduced; and the fit of the filter inside an aircasing or flue may be more easily made and need not be quite as exact'.
  • a filter having a series of folds, each .mi ofthe said folds being spread at its ends, and
  • a filter of fiexible material having a series of folds, the said folds being spread .25* at their ends to provide a flat, stralght rim and edge, for the filter, and a fiexible, inextensible strip secured to the ends of the folds to prevent the ends from separating during fiexure of the filter.
  • a filter of flexible material having a series of folds and flattened edges at the termination of the series, the said folds being spread at their ends to provide flattenedC lateral edges, and an edging of fiexible, inextensible material secured to the edges to preserve the fiat shape ofthe latter and to limit the relative change of position of the folds during flexure of the filter.

Description

' Dec.v13, 19.32..` C, DAVlEs 1,890,499
FILTER Filed NOV. 25, 1931 Patented Dec. y13, 1932 CHARLES DAVIBS, OF NEW YORK, 'N'.gY.
FILTER.
Applicatonled November 25, 1931. Serial No. 577,177.
'Ihis invention relates to filters intendedl curved or bent in shape, the former suffers the inconvenience of complications 1n pack-V ing and shipping and the latter the difficulty of handling.
The main object of my invention therefore is to provide a flexible corrugated filter which shall have means' to retain the individual cori rugations in regular sequence.
Another object of my invention is to provide a filter which may be manufactured and packed in a standard manner and yet be adaptable to a wide range of conditions of use.
@ther and further objects and advantages will become apparent from the description below, in connection with the draw-ing, of a preferred embodimentof my invention. In the drawing:
Fig. 1 is a front elevational view of a filter insert according to my invention.
Fig. 2 is a detail in front elevation similar to Fig. 1 and showing a slight modification,
i parts being broken away to show the structure of the filter.
Fig. 3 is a side elevation of a part of Fig. 1, portions being broken away.
Fig. 4 is a view similar to Fig. 3 but show- 40 ing the filter bent or flexed as in use.
The filter embodying my invention also embodies preferably certain Vof the features shown in'my co-pending application for lters Serial No. 471,317 led July 28, 1930 and comprises a main ltering body 1 of fibrous material such as cellulose, supported and held between an entrance surface sheet 2 of sized, reticulated textile material or other similar semi-stiff reticulated mate- '50 rial, and an exit surface sheet of fuzzy `material of a textile nature. The assemblyl of cellulose and surface sheets is then pleated vor folded to form a spaced series of zlg-zags or corrugations 4. The ends of individual corrugations or folds are then crushed or mashed as at 5 to form flattened, spread end portions which overlap to provide a plane edge or rim 6 for the filter. The edges may then be stapled or stitched, and covered with felt strips; but preferably a strip of cloth, felt or other flexible inextensible material is folded over the edge as `at 7 and stitched thereto as in Fig. 1 at 8, or stapled thereto as in'Fig. 2 at 8. It is to be understood, of course, that the edging 7 lmay be secured to 35 the edge 6 in any other manner'withont de-4 parting from the principles of this invention. The ed ing 7 may be run around the four edges o the filter for convenience and simplicity of manufacture as shown in Fig. 1 but 70 it is clear that it may be replaced at what may be called the upper and lower edges 9 and l() by a relatively rigid strip of cardboard or other material.
In the preferred form of my invention,
which is shown in the drawing, it is to be noted that the ends ofthe ridges or folds on each side of the filter are fiattened to a line midway between the crests of the folds on one side and the crests of the folds on the other side; so that the fltersurface extends e ually on either side of the rim 6. The sprea flattened edges of successive folds on one side of the filter are overlapped, 'and the spread, flattenededges of successive folds on the other side of the filter are also overlapped. Thus the overlap of the edges of two consecutive folds on one side of the filter will come opposite the Continuous fiat edge portion that fold on the other side of the filter which corre- .90
sponds to the bottom half of the valley between `the crests of the two first-mentioned folds. f
The preferred embodiment shown in Fig. r, 1 is a unit with sufficient rigidity of form to 9" permit convenient handling. At the same time it may be easily bent or flexed about a horizontal axis as the conditions of use may req11ire. In such case the individual folds or corrugations will be held-in definite sequen- 10 opt tial relation by the lateral connectors or ties 7 which prevent the escape or wide separation of the said folds. For this last purpose the strips 7 may be replaced by strips of similar inextenszible flexible material attached to and running transversely of the corrugations and intermediate the lateral edges of the filter. However, the preferred form has animportantadvantage in most cases of actual use. By reducing the edge portion of the filter to a fiat surface or rim with a rectilinear edge the possibility of'air leakage about the edges of the filter is necessarily reduced; and the fit of the filter inside an aircasing or flue may be more easily made and need not be quite as exact'.
Having thus described 'my` invention, I claim:
I. A filter having a series of folds, each .mi ofthe said folds being spread at its ends, and
means to hold the spread ends in overlapping relation to form a flat rim for the filter.
2. A filter of fiexible material having a series of folds, the said folds being spread .25* at their ends to provide a flat, stralght rim and edge, for the filter, and a fiexible, inextensible strip secured to the ends of the folds to prevent the ends from separating during fiexure of the filter.
3. A filter of flexible material having a series of folds and flattened edges at the termination of the series, the said folds being spread at their ends to provide flattenedC lateral edges, and an edging of fiexible, inextensible material secured to the edges to preserve the fiat shape ofthe latter and to limit the relative change of position of the folds during flexure of the filter.
" f CHAS. DAVIES.Y
US577177A 1931-11-25 1931-11-25 Filter Expired - Lifetime US1890499A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2565846A (en) * 1947-08-29 1951-08-28 Metal Textile Corp Means for producing knitted metallic mesh structures
US3177637A (en) * 1959-11-12 1965-04-13 Davis Maurice Air filters
US3242655A (en) * 1964-05-01 1966-03-29 American Air Filter Co High efficiency unit filter assembly
US3273321A (en) * 1963-08-26 1966-09-20 Cambridge Filter Corp Air filter having a replaceable cartridge
DE2162355A1 (en) * 1971-12-16 1973-06-20 Purolator Filter Gmbh FLAT FILTER INSERT, IN PARTICULAR FOR COMBUSTION MACHINERY AND DEVICE AND METHOD FOR MANUFACTURING THESE
US3800512A (en) * 1971-07-06 1974-04-02 Arudale Mfg Inc Flexible filter element
EP0438639A1 (en) * 1990-01-25 1991-07-31 Firma Carl Freudenberg Production method of a corrugated filter element made of fibre fleece
US5674302A (en) * 1994-07-12 1997-10-07 Nippondenso Co., Ltd. Automobile filter element
US5679122A (en) * 1993-08-14 1997-10-21 Minnesota Mining & Manufacturing Company Filter for the filtration of a fluid flow
US5891208A (en) * 1997-01-09 1999-04-06 Gil; George Multilayer filter
US6293984B1 (en) 1998-08-21 2001-09-25 Toyoda Boshoku Corporation Air filter
US20040112526A1 (en) * 2002-04-10 2004-06-17 Kyung-Ju Choi Thermobondable filter medium and border frame and method of making same
US20050252075A1 (en) * 2004-05-11 2005-11-17 Blue Rhino Global Sourcing, Llc Wave shaped screen for insect trap
DE10111118B4 (en) * 2000-03-15 2014-10-23 Valeo Filter device for equipping a ventilation and / or heating and / or air conditioning, in particular for motor vehicles
US11369910B2 (en) 2017-04-11 2022-06-28 Cummins Filtration Ip, Inc. Panel filter element

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2565846A (en) * 1947-08-29 1951-08-28 Metal Textile Corp Means for producing knitted metallic mesh structures
US3177637A (en) * 1959-11-12 1965-04-13 Davis Maurice Air filters
US3273321A (en) * 1963-08-26 1966-09-20 Cambridge Filter Corp Air filter having a replaceable cartridge
US3242655A (en) * 1964-05-01 1966-03-29 American Air Filter Co High efficiency unit filter assembly
US3800512A (en) * 1971-07-06 1974-04-02 Arudale Mfg Inc Flexible filter element
DE2162355A1 (en) * 1971-12-16 1973-06-20 Purolator Filter Gmbh FLAT FILTER INSERT, IN PARTICULAR FOR COMBUSTION MACHINERY AND DEVICE AND METHOD FOR MANUFACTURING THESE
EP0438639A1 (en) * 1990-01-25 1991-07-31 Firma Carl Freudenberg Production method of a corrugated filter element made of fibre fleece
US5167740A (en) * 1990-01-25 1992-12-01 Carl Freudenberg Method of making a filter insert of nonwoven material in the form of a pleated pack
US5679122A (en) * 1993-08-14 1997-10-21 Minnesota Mining & Manufacturing Company Filter for the filtration of a fluid flow
US5674302A (en) * 1994-07-12 1997-10-07 Nippondenso Co., Ltd. Automobile filter element
US5993580A (en) * 1994-07-12 1999-11-30 Nippondenso Co., Ltd Process for manufacturing a filter element
US5891208A (en) * 1997-01-09 1999-04-06 Gil; George Multilayer filter
US6293984B1 (en) 1998-08-21 2001-09-25 Toyoda Boshoku Corporation Air filter
DE10111118B4 (en) * 2000-03-15 2014-10-23 Valeo Filter device for equipping a ventilation and / or heating and / or air conditioning, in particular for motor vehicles
US20040112526A1 (en) * 2002-04-10 2004-06-17 Kyung-Ju Choi Thermobondable filter medium and border frame and method of making same
US7112255B2 (en) * 2002-04-10 2006-09-26 Aaf-Mcquay Inc. Thermobondable filter medium and border frame and method of making same
US20050252075A1 (en) * 2004-05-11 2005-11-17 Blue Rhino Global Sourcing, Llc Wave shaped screen for insect trap
US11369910B2 (en) 2017-04-11 2022-06-28 Cummins Filtration Ip, Inc. Panel filter element

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