EP0149590A2 - Appareil de protection respiratoire - Google Patents

Appareil de protection respiratoire Download PDF

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Publication number
EP0149590A2
EP0149590A2 EP85850004A EP85850004A EP0149590A2 EP 0149590 A2 EP0149590 A2 EP 0149590A2 EP 85850004 A EP85850004 A EP 85850004A EP 85850004 A EP85850004 A EP 85850004A EP 0149590 A2 EP0149590 A2 EP 0149590A2
Authority
EP
European Patent Office
Prior art keywords
filter material
material body
protection means
respiratory protection
ring
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Withdrawn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
EP85850004A
Other languages
German (de)
English (en)
Other versions
EP0149590A3 (fr
Inventor
Per-Erik Siversson
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.)
FLODINS FILTER AB
Original Assignee
FLODINS FILTER 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 FLODINS FILTER AB filed Critical FLODINS FILTER AB
Publication of EP0149590A2 publication Critical patent/EP0149590A2/fr
Publication of EP0149590A3 publication Critical patent/EP0149590A3/fr
Withdrawn legal-status Critical Current

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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
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A41D13/1107—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape
    • A41D13/1115—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a horizontal pleated pocket
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A41D13/1107—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape
    • A41D13/1138—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a cup configuration
    • A41D13/1146—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a cup configuration obtained by moulding

Definitions

  • the present invention relates to a respiratory protection means intended to be worn over the mouth and nose for the purpose of protecting the respiratory system from pollution.
  • the respiratory protection means comprises a cup-shaped filter material body, the outer end of which is so executed at its edge as to exhibit an element intended to make contact with the face of a wearer in such a way that either the wearer's nose or mouth or preferably both are enclosed within the space formed inside the cup shape in such a way that the 'air from the surroundings will be obliged to pass through the filter material body and into said space.
  • the present invention relates to a protective means of a relatively conventional type which may be used in the course of work where dust or mist, for example oil mist, is encountered.
  • Respiratory protection means of this kind are executed in the form of a cup of a fibrous material, the edge of which extends from the bridge of the nose and down around the mouth. Breathing takes place through the fibrous materiat, which may be paper pulp or a similar material or a non-woven fibre fabric in one or more Layers.
  • the respiratory protection means is provided with an exhalation valve.
  • a respiratory protection means of this kind will to all intents and purposes possess the characteristics of a disposable item, and these are intended on the whole to last only for a relatively short period, with no provision being made for regeneration after becoming dirtied by replacement of the filter material or by washing. This means that a requirement exists for a relatively low price to be achieved.
  • the simplest protection means which consist only of a cup of a cellulose material, this requirement is easily met, although on the other hand the ability to trap particles will be limited and such protection means may be used only where particles, and not gases, are present, and primarily with relatively coarse dust particles.
  • attempts have been made to manufacture them from a more complex textile material, although this had the effect of very considerably increasing their resistance to breathing.
  • the object of the present invention is to produce a respiratory protection means which falls within the aforementioned class of simple protection means intended to be thrown away once they have become choked with trapped material, said respiratory protection means not only exhibiting an excellent trapping ability enabling it to be executed for the purpose of trapping harmful gases and extremely fine particles, and even oil mist, but also exhibiting Low resistance to breathing in spite of this.
  • a further object of the invention is to utilize in the manufacture of the respiratory protection means well-proven methods used in the production of certain other types of filter, enabling a suitable product to be manufactured at low cost.
  • the object of the invention is achieved by executing the respiratory protection means in such a way that the filter material body exhibits in a previously disclosed fashion at least one strip of filter material pleated in its transverse sense, wherein the ends of the one or more strips have been connected together in such a way as to form a ring which, by the spreading out of its pleats for this purpose has been given said cup shape, wherein the element intended to make contact with the face consists of a ring of a material which, by casting or some similar process, has been attached to one of the edge parts of the one or more pleated filter material strips so as to form an airtight connection, whereas the opposite edge part of the filter material body has been attached in a similarly airtight fashion to a plate or similar, which permits the sealing of the outer end edge of the filter material body.
  • Fig. 1 shows a perspective view of the respiratory protection means from the front
  • Fig. 2 shows a section along the line II-II in Fig. 3
  • Fig. 3 shows a section along the line III-III in Fig. 2.
  • the respiratory protection means in accordance with the invention may be seen from the Figures to consist of a filter material body 1 which exhibits a pleated strip 4 of a particle-trapping filter material, for example stiff filter paper.
  • the material is selected to exhibit a particle trapping capacity such that the filtration capacity is suitable for the intended area of use. It is customary to divide up respiratory protection means intended to trap particles in the following classes: coarse, solid particles; fine, solid particles, and oil mist.
  • the trapping capacity specified for a particular respiratory protection means should be no better than that which is necessary, in view of the fact that a denser filter material will produce greater resistance to breathing.
  • the filtration area provided is so large that a denser material can be used throughout with the aim of reducing the number of different versions of the respiratory protection means.
  • the strip 4 of filter material consists, as has been mentioned already, of a particle-trapping filter material. Depending on the nature of the material selected, this is able to trap dry and even liquid particles, but not gaseous particles. It is assumed in this particular embodiment, however, that there is present ahead of the strip 4 of filter material a second strip 5 of filter material consisting of a filter material coated with fine particles of active carbon. Active carbon is known to possess the ability to fix gas molecules of a certain complexity at its surface. Since harmful gases generally have a relatively complex molecular structure, the majority of the toxic gases encountered can be trapped in a filter material containing active carbon.
  • a carbon filter on its on is not, as a general rule, chosen for respiratory protection means, although an outer, particle-trapping filter is usually preser on accordance with what is illustrated in relation to this embodiment.
  • the respiratory protection means in a ordance with the invention is executed with additional strips of filter material, including those of a kind other than that indicater above, but without departing from the idea of invention.
  • the fil material consists originally of a long strip, which is then pleat in order to reduce its Length.
  • the pleated strip is then given form illustrated here, which is finished off by having free ends of the strip stuck together.
  • the pleating of the materi gives it a large surface area, providing Low flow resistance and trapping capacity in respect of the pollutants, thereby accordinging a Long service Life.
  • the pleated form also provides exellent mechanical strength, especially if the strip is bent into cindrical form.
  • the two pleated strips are maintained in the conical form illustrated, and a plastics material is cast around their edges.
  • the plastics material used should preferably be PVC, which is easily worked and produces a soft, elastic body.
  • Previously disclosed for use in the casting process is the substance known as plastisol, this being a viscous mass which is injected into a mould, whereupon it is caused to gelate by the application of heat.
  • the casting mould used for this purpose is executed in such a way that the plastics body produced at the outer end of the conical form is given a shape suitable for making contact with the face of the person who is to wear the respiratory protection means.
  • This plastics body is referred to below as the face ring 2 .
  • a second plastics body At the narrower end of the pleated, conical strips 4 and 5 of filter material there is cast in position a second plastics body, referred to below as the end plate 3 .
  • the two plastics bodies 2 and 3 are cast in such a way around the edges of the strips 4 and 5 of pleated material as to provide complete airtight sealing at this point, thereby producing a space 7 inside the respiratory protection means, into which space air inhaled through the ring 2 pressed against the wearer's face is able to flow from the surroundings only by passing through the filter material contained in the filter material body 1 .
  • an adjustable strap 13 by means of which the breathing mask can be held against the face.
  • This consists of four short lengths of tape 14 projecting from the ring 2 , said short lengths of - tape being attached in pairs by means of the clamps 15 to two Longer tapes 16 (of which only short,.connecting sections are shown).
  • the end plate 3 supports an exhalation valve 8 which may be cast as an integral part of the material of the plate 3 in the same operation in which the plate 3 is formed and the strips 4 and 5 of filter material are attached.
  • the exhalation valve 8 is intended to permit exhalation to take place with Low resistance, which is necessary in order to facilitate respiration if the filter material in the strip 1 presents high flow resistance.
  • the exhalation valve may be omitted.
  • the potential applications for the respiratory protection means in accordance with the invention appear to be particularly great in this respect, since the filter material possesses a very large surface area and also exhibits low specific flow resistance.
  • the exhalation valve 8 illustrated may consist of a housing 9 with a valve seat 10 against which an elastic disc, for example a rubber plate 11 is arranged to Locate.
  • an elastic disc for example a rubber plate 11
  • the disc 11 will be caused to Lift from the valve seat 10 , permitting air to flow out, whereas in the presence of equalized pressure or negative pressure inside the space 7 , it will Locate against the valve seat 10, cutting off the flow of air.
  • the respiratory protection means When in use, the respiratory protection means is held against the face with the assistance of the adjustable strap 13 in such a way that the face ring 2 forms a seal against the upper part of the nose, over the cheeks, and around the mouth.
  • the exhalation valve 8 will close as air is inhaled, and if the face ring 2 is required to make full contact with the face, the arriving air must flow through the strip 1 of filter material. ExhaLation will produce a certain level of positive pressure inside the space 7 , and the exhalation valve 8 will open, permitting most of the exhaled air to flow out through it. In those cases in which it is preferred not to provide an exhalation valve, air will also flow through the strip 1 of filter material during exhalation.
  • a respiratory protection means of this type are closely governed by the fact that its circumference must fit the face, and that it cannot be allowed to extend too far outwards in a longitudinal sense as it would then obstruct the vision and the freedom of movement of the wearer, at the same time as the gravitational torque would make the respiratory protection means uncomfortable to wear.
  • these dimensional limitations have been compensated for by causing the strip of filter material to be pleated, enabling the desired large surface area of fitter material to be achieved within the Limited, inscribed space available.
  • the desired simplicity of the respiratory protection means has been achieved by causing its structure to consist of the face ring and the outer plate,and for these to be connected to the filter material.
  • a material which exhibits such low strength characteristics as paper is endowed with considerable rigidity and strength if the strip of material is pleated and formed into the shape of a cup and is also held securely around its edges.
  • the use of the casting process provides a very simple means of securing the edges of the strip of filter material, together with the necessary segling of the ends, as well as the ring arranged to make contact with the nase and serving also as an attachment point for the adjustable strap, all in a single operation. It is possible in this way to produce a very simple respiratory protection means which is alsc very inexpensive in relation to its functional capacity even under difficult operating conditions, and which can be so executed as clean the air of both particles and gases.
  • the respiratory protection means can also be executed within ne scope of the following Patent CLaims in a manner other than that illustrated and described in connection with the preferred embodiment.
  • the choice of the materials for the filter material body, consisting of one or more pleated strips, is free depending on the cleaning capacity desired for a given area of application.
  • the respiratory protection means illustrated in the drawings can, of course, as an alternative, constitute part of a full mask, for example a breathing mask equipped with eye protection means.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
EP85850004A 1984-01-11 1985-01-07 Appareil de protection respiratoire Withdrawn EP0149590A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8400107A SE445299B (sv) 1984-01-11 1984-01-11 Andningsskydd
SE8400107 1984-01-11

Publications (2)

Publication Number Publication Date
EP0149590A2 true EP0149590A2 (fr) 1985-07-24
EP0149590A3 EP0149590A3 (fr) 1986-04-23

Family

ID=20354267

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85850004A Withdrawn EP0149590A3 (fr) 1984-01-11 1985-01-07 Appareil de protection respiratoire

Country Status (2)

Country Link
EP (1) EP0149590A3 (fr)
SE (1) SE445299B (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0281275A3 (en) * 1987-03-02 1989-06-21 Minnesota Mining And Manufacturing Company High efficiency respirator
US4883547A (en) * 1987-03-02 1989-11-28 Minnesota Mining And Manufacturing Company Method of forming a high efficiency respirator
US5320096A (en) * 1992-02-21 1994-06-14 Gibeck Respiration Ab Filtering device and the use thereof
US5656368A (en) * 1992-08-04 1997-08-12 Minnesota Mining And Manufacturing Company Fibrous filtration face mask having corrugated polymeric microfiber filter layer
FR2758442A1 (fr) * 1997-01-22 1998-07-24 Yamamoto Kogaku Element ou dispositif de reglage de la longueur de lanieres d'attache, et masque equipe d'un tel dispositif
WO2000004957A1 (fr) * 1998-07-24 2000-02-03 Minnesota Mining And Manufacturing Company Masque facial equipe d'une soupape d'expiration a filtre
GB2352978A (en) * 1999-08-10 2001-02-14 Kenneth Roger Tuckwell Filter and preheater
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
CN105495774A (zh) * 2014-12-28 2016-04-20 大庆元子科技开发有限公司 竖向折痕折叠低压口罩
CN109222282A (zh) * 2014-12-28 2019-01-18 大庆元子科技开发有限公司 一种口罩
GB2602258A (en) * 2020-12-15 2022-06-29 Denroy Group Ltd Respirator mask and method of manufacturing a mask
KR20220089810A (ko) * 2020-12-21 2022-06-29 주식회사연우 가방 일체형 공기정화기
US11871802B1 (en) 2022-08-17 2024-01-16 Integrated Pharma Services, Llc Pleating spacer and its use to provide improved facial masks and respirators

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE406719A (fr) *
GB2045093A (en) * 1979-04-03 1980-10-29 Racal Safety Ltd Respirator
DE3032437C2 (de) * 1980-08-28 1982-08-05 Drägerwerk AG, 2400 Lübeck Halbmaskenförmig ausgebildetes Staubfilter

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4883547A (en) * 1987-03-02 1989-11-28 Minnesota Mining And Manufacturing Company Method of forming a high efficiency respirator
EP0281275A3 (en) * 1987-03-02 1989-06-21 Minnesota Mining And Manufacturing Company High efficiency respirator
US5320096A (en) * 1992-02-21 1994-06-14 Gibeck Respiration Ab Filtering device and the use thereof
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
FR2758442A1 (fr) * 1997-01-22 1998-07-24 Yamamoto Kogaku Element ou dispositif de reglage de la longueur de lanieres d'attache, et masque equipe d'un tel dispositif
EP1479413A3 (fr) * 1998-07-24 2004-12-01 Minnesota Mining And Manufacturing Company Masque facial equipe d'une soupape d'expiration a filtre
WO2000004957A1 (fr) * 1998-07-24 2000-02-03 Minnesota Mining And Manufacturing Company Masque facial equipe d'une soupape d'expiration a filtre
US6805124B2 (en) 1998-07-24 2004-10-19 3M Innovative Properties Company Face mask that has a filtered exhalation valve
GB2352978A (en) * 1999-08-10 2001-02-14 Kenneth Roger Tuckwell Filter and preheater
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
CN105495774A (zh) * 2014-12-28 2016-04-20 大庆元子科技开发有限公司 竖向折痕折叠低压口罩
CN105495774B (zh) * 2014-12-28 2018-05-04 荆州市中心医院 斜向折痕折叠低压口罩
CN109222282A (zh) * 2014-12-28 2019-01-18 大庆元子科技开发有限公司 一种口罩
GB2602258A (en) * 2020-12-15 2022-06-29 Denroy Group Ltd Respirator mask and method of manufacturing a mask
GB2602258B (en) * 2020-12-15 2022-12-21 Denroy Group Ltd Respirator mask and method of manufacturing a mask
KR20220089810A (ko) * 2020-12-21 2022-06-29 주식회사연우 가방 일체형 공기정화기
US11871802B1 (en) 2022-08-17 2024-01-16 Integrated Pharma Services, Llc Pleating spacer and its use to provide improved facial masks and respirators
WO2024039921A1 (fr) * 2022-08-17 2024-02-22 Integrated Pharma Services, Llc Dispositifs d'espacement de plissage et leur utilisation pour fournir des masques faciaux et des respirateurs améliorés

Also Published As

Publication number Publication date
SE8400107D0 (sv) 1984-01-11
SE8400107L (sv) 1985-07-12
SE445299B (sv) 1986-06-16
EP0149590A3 (fr) 1986-04-23

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