EP0469498A2 - Masque oro-nasal pour filtration de particules - Google Patents

Masque oro-nasal pour filtration de particules Download PDF

Info

Publication number
EP0469498A2
EP0469498A2 EP91112681A EP91112681A EP0469498A2 EP 0469498 A2 EP0469498 A2 EP 0469498A2 EP 91112681 A EP91112681 A EP 91112681A EP 91112681 A EP91112681 A EP 91112681A EP 0469498 A2 EP0469498 A2 EP 0469498A2
Authority
EP
European Patent Office
Prior art keywords
folds
filter layer
layer
half mask
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.)
Withdrawn
Application number
EP91112681A
Other languages
German (de)
English (en)
Other versions
EP0469498A3 (en
Inventor
Hubert Bullach
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.)
Honeywell Safety Products Sweden AB
Original Assignee
Bilsom AB
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 Bilsom AB filed Critical Bilsom AB
Publication of EP0469498A2 publication Critical patent/EP0469498A2/fr
Publication of EP0469498A3 publication Critical patent/EP0469498A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • A62B23/02—Filters for breathing-protection purposes for respirators
    • A62B23/025—Filters for breathing-protection purposes for respirators the filter having substantially the shape of a mask

Definitions

  • the invention relates to a particle-filtering half mask, the shell-shaped domed mask body of which consists at least partially of filter material, with a central filter layer made of porous, flexible filter material which is accommodated between an outer and inner porous cover layer.
  • Filtering half masks only enclose the user's mouth and nose.
  • the inhaled air flows through the mask body which essentially forms the filter and is curved in the form of a bowl.
  • These particle filtering half masks are often used as disposable dust filter masks. They are described in the DIN 58645 standard.
  • the filter fineness i.e. The pore size of the filter material used is determined by the particle size of the air contaminants to be filtered out.
  • the flow resistance that occurs which is particularly noticeable to the user as an inhalation resistance and therefore must not exceed predetermined values, depends directly on the pore size of the filter material and on the available passage area, i.e. the filter area. Therefore, when using very fine-pored filter material, the largest possible filter area must be provided in order to compensate for the increase in flow resistance.
  • the filter area is predetermined by the size of the mask body, which cannot be increased significantly.
  • pleated filters are used in the case of particle-filtering half masks of another type with a separate filter housing and exchangeable filter insert.
  • the pleats of these filters are essentially perpendicular to the filter surface, i.e. parallel to the flow direction.
  • the height of the folds determines the thickness of the filter insert and thus also the depth of the filter housing that is attached to the front of the half mask.
  • the object of the invention is therefore to design a particle-filtering half mask of the type mentioned in such a way that a significant increase in the effective filter area is achieved without substantially increasing the outer dimensions of the half mask.
  • the effective filter area can be increased considerably without significantly increasing the dimensions of the half mask. Only the thickness, i.e. the distance between the two top layers is slightly larger than with a conventional half mask with an unfolded middle filter layer.
  • the middle filter layer can be placed in pleated folds, which are arranged, for example, in the form of scales.
  • the production is relatively simple because the filter material, which is initially in flat form, can be folded; a spatially curved shell is then produced from this pleated filter layer in one molding process.
  • a plurality of folds are secured by a jointly glued-on holding strip which extends transversely to the direction of the folds, thereby facilitating the molding process.
  • the particle-filtering half mask shown in FIG. 1 has a mask body 1, which essentially forms the filter.
  • the mask body 1 consists of an outer porous cover layer 2 (FIG. 2), an inner porous cover layer 3 and an intermediate filter layer 4, which is made, for example, of a multi-layer nonwoven fabric.
  • the cover layers 2, 3 and the filter layer are connected to one another at a mask edge 5, for example welded or glued.
  • An exhalation valve 6 is arranged approximately in the middle of the mask body 1, through which the exhaled air flows out without flowing through the filter again.
  • Retaining straps 7, which are only hinted at in Fig. 1, serve to hold the half mask on the head of the user so that the edge 5 lies as close as possible to the face.
  • a metallic nose bridge 8 is used to shape the half mask in the nose area.
  • a sealing lip 9 extends from the edge 5 Inside.
  • the middle filter layer 4 consisting of multi-layer filter fleece is pleated like several folds 11 which run approximately horizontally. Instead, the folds 11 can also run vertically or in any other direction. The folds 11 lie flat between the two cover layers 2 and 3.
  • the middle filter layer 4 is folded in a scale-like manner; each fold 11 extending over the entire width of the mask body 1 borders on the next fold 11, as can be seen particularly clearly in the illustration according to FIG. 3. There, the middle filter layer 4 is shown separately in a vertical section.
  • the middle filter layer 4 consists of multi-layer filter material, the layers of which are folded together on top of one another, which cannot be seen in the drawing. Modifications of the folding of the middle filter layer 4 are shown in FIGS. 4, 5 and 6, but this selection is not exhaustive.
  • the folds 11 in the embodiment according to FIG. 4 are meandering in vertical section; the folds 11 run alternately on the inside and the outside.
  • the folds 11 adjoin each other in the embodiments according to FIGS. 3 and 4, it is shown in FIG. 5 that the folds 11 can also overlap to a greater extent. This results in a particularly large increase in the effective filter area.
  • FIG. 6 shows an embodiment in which the folds 11 of the middle filter layer 4 in the upper half of the mask body 1 are directed downwards in a scale-like manner, while in the lower half they are directed upwards in a scale-like manner.
  • a common holding strip 12 which extends perpendicularly (i.e. transverse to the direction of the folds), is glued onto several folds 11.
  • the holding strip 12 serves to secure the folds 11 lying flat after the folding process. This facilitates the subsequent molding process, in which the curved shape is created.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
EP19910112681 1990-07-28 1991-07-27 Particle filtering halfmask Withdrawn EP0469498A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9011154U DE9011154U1 (de) 1990-07-28 1990-07-28 Partikelfiltrierende Halbmaske
DE9011154U 1990-07-28

Publications (2)

Publication Number Publication Date
EP0469498A2 true EP0469498A2 (fr) 1992-02-05
EP0469498A3 EP0469498A3 (en) 1992-04-22

Family

ID=6856030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910112681 Withdrawn EP0469498A3 (en) 1990-07-28 1991-07-27 Particle filtering halfmask

Country Status (2)

Country Link
EP (1) EP0469498A3 (fr)
DE (1) DE9011154U1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5656368A (en) * 1992-08-04 1997-08-12 Minnesota Mining And Manufacturing Company Fibrous filtration face mask having corrugated polymeric microfiber filter layer
WO1999024119A1 (fr) * 1997-11-11 1999-05-20 Minnesota Mining And Manufacturing Company Masques respiratoires presentant des valves et d'autres composants fixes au masque par une pastille adhesive imprimee
EP1243291A1 (fr) * 2001-03-23 2002-09-25 Shigematsu Works Co., Ltd. Filtre et masque respiratoire jetable, étanche à la poussière équipée d'un tel filtre
EP1366784A1 (fr) * 2002-05-28 2003-12-03 Lee Bookyung Masque hygiénique
EP3066943A4 (fr) * 2013-11-07 2017-12-13 Lin, Jing-Jyr Structure de filtration
CN108652106A (zh) * 2017-03-29 2018-10-16 姜嘉怡 折叠过滤层的口罩

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB442725A (en) * 1934-07-10 1936-02-10 John Ambrose Sadd Major Improvements in respirators
US2201315A (en) * 1936-11-13 1940-05-21 American Optical Corp Respirator
US3049121A (en) * 1959-01-20 1962-08-14 Richard S Brumfield Oronasal mask
DE2938720C2 (de) * 1979-09-25 1982-05-19 Drägerwerk AG, 2400 Lübeck Atemhalbmaske für den Einmalgebrauch
WO1981001019A1 (fr) * 1979-10-09 1981-04-16 L Giffard Materiau filtrant et masque respiratoire en comportant application

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5656368A (en) * 1992-08-04 1997-08-12 Minnesota Mining And Manufacturing Company Fibrous filtration face mask having corrugated polymeric microfiber filter layer
US5753343A (en) * 1992-08-04 1998-05-19 Minnesota Mining And Manufacturing Company Corrugated nonwoven webs of polymeric microfiber
US5763078A (en) * 1992-08-04 1998-06-09 Minnesota Mining And Manufacturing Company Filter having corrugated nonwoven webs of polymeric microfiber
US5804295A (en) * 1992-08-04 1998-09-08 Minnesota Mining And Manufacturing Company Fibrous filtration face mask having corrugated polymeric microfiber filter layer
WO1999024119A1 (fr) * 1997-11-11 1999-05-20 Minnesota Mining And Manufacturing Company Masques respiratoires presentant des valves et d'autres composants fixes au masque par une pastille adhesive imprimee
US6125849A (en) * 1997-11-11 2000-10-03 3M Innovative Properties Company Respiratory masks having valves and other components attached to the mask by a printed patch of adhesive
EP1243291A1 (fr) * 2001-03-23 2002-09-25 Shigematsu Works Co., Ltd. Filtre et masque respiratoire jetable, étanche à la poussière équipée d'un tel filtre
EP1366784A1 (fr) * 2002-05-28 2003-12-03 Lee Bookyung Masque hygiénique
US6772759B2 (en) 2002-05-28 2004-08-10 Bookyung Lee Health mask with channelized breath passageways
EP3066943A4 (fr) * 2013-11-07 2017-12-13 Lin, Jing-Jyr Structure de filtration
CN108652106A (zh) * 2017-03-29 2018-10-16 姜嘉怡 折叠过滤层的口罩

Also Published As

Publication number Publication date
EP0469498A3 (en) 1992-04-22
DE9011154U1 (de) 1990-10-31

Similar Documents

Publication Publication Date Title
DE69912981T2 (de) Biegsamer filter für beatmungsgerät
DE2451402C2 (de) Chirurgische Gesichtsmaske
DE68923906T2 (de) Filterelement.
EP2283901B1 (fr) Matériau de filtre et masque de protection respiratoire
DE2949969C2 (fr)
DE2739940C3 (de) Umhüllung für Polsterkörpe-, insbesondere Matratzen für Krankenbetten
DE3125819A1 (de) Gesichtsfiltermaske
DE112014001988T5 (de) Maskenstruktur mit Sperrelement
EP1134014A1 (fr) Filtre plissé
EP0748177A1 (fr) Revetement de matelas
EP1037544A1 (fr) Enveloppe anti-allergenique destinee a recevoir des objets contamines avec des allergenes et/ou des poussieres fines inhalables
EP3743166B1 (fr) Demi-masque respiratoire et procédé de fabrication d'un demi-masque respiratoire
DE102018002343A1 (de) Atemhalbmaske
DE869737C (de) Atemschutzmaske zum Schutz gegen Staub u. dgl.
EP0469498A2 (fr) Masque oro-nasal pour filtration de particules
DE8004918U1 (de) Filternde gasmaske
DE9319372U1 (de) Filterelement
DE69206891T2 (de) Filter
WO1984003842A1 (fr) Elements de filtres pour appareils de filtrage
DE202020107570U1 (de) Gesichtsmaske
DE102017011320B4 (de) Atemhalbmaske
DE1434893C3 (de) Selbstretter zum Schutz gegen Kohlenoxid
DE3032437C2 (de) Halbmaskenförmig ausgebildetes Staubfilter
DE202020106886U1 (de) Atemschutzmaske
DE1948171A1 (de) Schwebstoffiltereinlagen fuer Atemschutzvorrichtungen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19921023