GB2162767A - Folded filter packing - Google Patents

Folded filter packing Download PDF

Info

Publication number
GB2162767A
GB2162767A GB08519227A GB8519227A GB2162767A GB 2162767 A GB2162767 A GB 2162767A GB 08519227 A GB08519227 A GB 08519227A GB 8519227 A GB8519227 A GB 8519227A GB 2162767 A GB2162767 A GB 2162767A
Authority
GB
United Kingdom
Prior art keywords
structures
folds
chevroned
strip
folded
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.)
Withdrawn
Application number
GB08519227A
Other versions
GB8519227D0 (en
Inventor
Jean Cordonnier
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.)
Safran Electrical and Power SAS
Precision Mecanique Labinal SA
Original Assignee
Labinal SA
Precision Mecanique Labinal SA
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 Labinal SA, Precision Mecanique Labinal SA filed Critical Labinal SA
Publication of GB8519227D0 publication Critical patent/GB8519227D0/en
Publication of GB2162767A publication Critical patent/GB2162767A/en
Withdrawn legal-status Critical Current

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/012—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/016—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements with corrugated, folded or wound filtering elements
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/12—Pleated filters

Abstract

Folded filter packings are formed from rectangular sheets folded along parallel lines, the folds 3 being of rounded section and the elongated areas 2 between the fold lines being indented so that each fold line presents a zig-zag shape. <IMAGE>

Description

SPECIFICATION Improvements relating to chevroned structures suitable for use as filtration packing.
The present invention relates to "chevroned" structures, i.e. structures formed from sheet materials which are folded and "chevroned" in such a way as to produce filtration packing.
The chevroned structures are generally obtained by imprinting in the sheet material alternate lines forming cavities and in relief, delimiting the "chevrons," which latter are then accentuated by a simultaneous thrust and guiding action.
This gives a structure which is not only folded concertina-fashion but in which each strip extending between the folds is "chevroned." In the prior art an attempt was made to produce such structures by folding two strips of sheet material simultaneously, interposing between them a flexible and malleable strip serving to expose and release the structures after they had been given their chevron configuration. The resulting structures are asymmetrical, since the summits of the folds in contact with one face are pointed while those in contact with the other are rounded. Various tests were performed, and it was found that part of the packing, particularly in the case of air filters for motors, remained unused.
One of the purposes of the present invention is to remedy this drawback.
The present invention is aimed at structures of "chevroned" sheets produced from a rectangular sheet folded, on the one hand, along equidistant parallel lines, to form an accordion-type element having a series of identical strips delimited by the edge of the folds, each strip being given successive markings in order to cause the strips to assume a chevron configuration, the said structure being characterised by the fact that the base of each fold is rounded. It was found that this arrangement provided a noticeable improvement in the retaining capacity of an air filter.
The invention will now be described in greater detail by reference to a particular version constituting a mere example thereof and illustrated in the attached drawings, wherein: Figure 1 is a view in perspective of a structure in accordance with the invention.
Figure 2 is an elevation, on a larger scale, of the structure to which the invention relates.
As may be seen from Figure 1, the "chevroned" structure according to the invention is obtained from a sheet material 1 folded to form an accordion-type element having identical strips 2 separated by folds 3.
Each strip 2 is provided with markings 4 taking the form of adjacent parallelograms alternating in such a way that each strip has a chevron configuration.
The folds 3 are produced in such a manner that their bases are rounded, all the folds being identical.
It has thus been found that the performance of air filters in which such structures are used can be very considerably improved.
Needless to say, the invention is not confined to the embodiment described in the foregoing and illustrated in the attached drawings. Numerous modifications can be made thereto in matters of detail without thereby departing from the scope of the invention.
1. A structure, suitable for use as a filter packing, comprising a rectangular sheet which has been folded along substantially equidistant parallel lines to form an accordion-type element having a series of substantially identical strips delimited by the edges of the folds, each strip having successive markings which alternate in such a way as to cause the strip to assume a chevron configuration and the base of each fold being rounded.
2. A structure according to claim 1 wherein the chevron configuration is obtained by imprinting in the sheet material alternate lines forming cavities and in relief delimiting the chevrons which chevrons are accentuated by suitable thrust and guiding means.
3. A structure according to claim 1 or 2 for use as a packing for air filters.
4. A structure substantially as shown in the accompanying drawings and described herein with reference thereto.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements relating to chevroned structures suitable for use as filtration packing. The present invention relates to "chevroned" structures, i.e. structures formed from sheet materials which are folded and "chevroned" in such a way as to produce filtration packing. The chevroned structures are generally obtained by imprinting in the sheet material alternate lines forming cavities and in relief, delimiting the "chevrons," which latter are then accentuated by a simultaneous thrust and guiding action. This gives a structure which is not only folded concertina-fashion but in which each strip extending between the folds is "chevroned." In the prior art an attempt was made to produce such structures by folding two strips of sheet material simultaneously, interposing between them a flexible and malleable strip serving to expose and release the structures after they had been given their chevron configuration. The resulting structures are asymmetrical, since the summits of the folds in contact with one face are pointed while those in contact with the other are rounded. Various tests were performed, and it was found that part of the packing, particularly in the case of air filters for motors, remained unused. One of the purposes of the present invention is to remedy this drawback. The present invention is aimed at structures of "chevroned" sheets produced from a rectangular sheet folded, on the one hand, along equidistant parallel lines, to form an accordion-type element having a series of identical strips delimited by the edge of the folds, each strip being given successive markings in order to cause the strips to assume a chevron configuration, the said structure being characterised by the fact that the base of each fold is rounded. It was found that this arrangement provided a noticeable improvement in the retaining capacity of an air filter. The invention will now be described in greater detail by reference to a particular version constituting a mere example thereof and illustrated in the attached drawings, wherein: Figure 1 is a view in perspective of a structure in accordance with the invention. Figure 2 is an elevation, on a larger scale, of the structure to which the invention relates. As may be seen from Figure 1, the "chevroned" structure according to the invention is obtained from a sheet material 1 folded to form an accordion-type element having identical strips 2 separated by folds 3. Each strip 2 is provided with markings 4 taking the form of adjacent parallelograms alternating in such a way that each strip has a chevron configuration. The folds 3 are produced in such a manner that their bases are rounded, all the folds being identical. It has thus been found that the performance of air filters in which such structures are used can be very considerably improved. Needless to say, the invention is not confined to the embodiment described in the foregoing and illustrated in the attached drawings. Numerous modifications can be made thereto in matters of detail without thereby departing from the scope of the invention. CLAIMS
1. A structure, suitable for use as a filter packing, comprising a rectangular sheet which has been folded along substantially equidistant parallel lines to form an accordion-type element having a series of substantially identical strips delimited by the edges of the folds, each strip having successive markings which alternate in such a way as to cause the strip to assume a chevron configuration and the base of each fold being rounded.
2. A structure according to claim 1 wherein the chevron configuration is obtained by imprinting in the sheet material alternate lines forming cavities and in relief delimiting the chevrons which chevrons are accentuated by suitable thrust and guiding means.
3. A structure according to claim 1 or 2 for use as a packing for air filters.
4. A structure substantially as shown in the accompanying drawings and described herein with reference thereto.
GB08519227A 1984-08-09 1985-07-31 Folded filter packing Withdrawn GB2162767A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8412590A FR2568787B1 (en) 1984-08-09 1984-08-09 IMPROVEMENTS ON CHEVRONATED SHEET STRUCTURES FOR USE AS FILTRATION LININGS

Publications (2)

Publication Number Publication Date
GB8519227D0 GB8519227D0 (en) 1985-09-04
GB2162767A true GB2162767A (en) 1986-02-12

Family

ID=9306936

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08519227A Withdrawn GB2162767A (en) 1984-08-09 1985-07-31 Folded filter packing

Country Status (6)

Country Link
JP (1) JPS6137219U (en)
DE (2) DE8521419U1 (en)
ES (1) ES288609Y (en)
FR (1) FR2568787B1 (en)
GB (1) GB2162767A (en)
IT (1) IT1185853B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2195917A (en) * 1986-10-06 1988-04-20 British Railways Board Filter element

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5630940A (en) * 1993-04-01 1997-05-20 Minnesota Mining And Manufacturing Company Filter device for the filtration of fluids
DE10124504B4 (en) * 2001-05-19 2017-07-06 Mahle International Gmbh Filter, in particular for a ventilation system of a motor vehicle
WO2007090778A1 (en) * 2006-02-09 2007-08-16 Mann+Hummel Gmbh Filter element for an air filter
EP2173461B1 (en) * 2007-07-27 2011-06-15 Mann + Hummel GmbH Air filter, especially for internal combustion engines in motor vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB177780A (en) * 1921-04-01 1923-02-15 Armin Renyi Improvements in rolling mills for manufacturing corrugated pasteboard, sheet metal and the like
US1498505A (en) * 1922-04-03 1924-06-17 Buchanan Vernon Jamieson Hat or cap sweatband shield or pad
GB1032973A (en) * 1962-11-09 1966-06-15 Wood Marc Sa Constructional materials derived from developable chevroned structures and a method of making such materials
US3726408A (en) * 1966-04-11 1973-04-10 Wood M Sa Structures of sheet materials made of asymmetric folds

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR67078E (en) * 1954-11-29 1957-11-04 New plate material, processes and devices for obtaining it, and its applications
US3058594A (en) * 1960-06-06 1962-10-16 Purolator Products Inc Pleated paper filter
US3716436A (en) * 1970-03-16 1973-02-13 Pall Corp Process for making a back pressure resistant filter element
FR2267818B1 (en) * 1974-04-16 1976-12-17 Labinal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB177780A (en) * 1921-04-01 1923-02-15 Armin Renyi Improvements in rolling mills for manufacturing corrugated pasteboard, sheet metal and the like
US1498505A (en) * 1922-04-03 1924-06-17 Buchanan Vernon Jamieson Hat or cap sweatband shield or pad
GB1032973A (en) * 1962-11-09 1966-06-15 Wood Marc Sa Constructional materials derived from developable chevroned structures and a method of making such materials
US3726408A (en) * 1966-04-11 1973-04-10 Wood M Sa Structures of sheet materials made of asymmetric folds

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2195917A (en) * 1986-10-06 1988-04-20 British Railways Board Filter element

Also Published As

Publication number Publication date
GB8519227D0 (en) 1985-09-04
FR2568787B1 (en) 1986-12-19
IT8521848A0 (en) 1985-08-02
ES288609U (en) 1986-01-01
FR2568787A1 (en) 1986-02-14
DE8521419U1 (en) 1985-12-12
ES288609Y (en) 1986-10-01
IT1185853B (en) 1987-11-18
DE3526572A1 (en) 1986-02-20
JPS6137219U (en) 1986-03-07

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)