WO1994019976A1 - Masque chirurgical avec une chicane incorporee constituant une barriere contre les liquides et/ou pour absorber les liquides - Google Patents

Masque chirurgical avec une chicane incorporee constituant une barriere contre les liquides et/ou pour absorber les liquides Download PDF

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Publication number
WO1994019976A1
WO1994019976A1 PCT/US1993/003478 US9303478W WO9419976A1 WO 1994019976 A1 WO1994019976 A1 WO 1994019976A1 US 9303478 W US9303478 W US 9303478W WO 9419976 A1 WO9419976 A1 WO 9419976A1
Authority
WO
WIPO (PCT)
Prior art keywords
mask
filtration layer
baffle
liquid
layer
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.)
Ceased
Application number
PCT/US1993/003478
Other languages
English (en)
Inventor
Hudson M. Benson
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.)
WL Gore and Associates Inc
Original Assignee
WL Gore and Associates Inc
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 WL Gore and Associates Inc filed Critical WL Gore and Associates Inc
Priority to AU39779/93A priority Critical patent/AU3977993A/en
Publication of WO1994019976A1 publication Critical patent/WO1994019976A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to protective masks worn to screen and protect from air-borne and liquid-borne contamination.
  • Surgical masks are widely employed today in a variety of applications. Although such masks were originally utilized to protect patients from viables carried in the materials expelled from the nose and mouth of the wearer, more recently these masks have been designed and used equally to protect the wearer from air ⁇ borne and liquid-borne infectious materials, especially with the growing concern over such diseases as HIV, Hepatitis B, and Tuberculosis.
  • the use of surgical masks to shield against the transference of infectious diseases between a patient and health care workers or others has become an important facet in the overall management of many organizations, including in virtually all health care facilities.
  • Surgical masks are generally composed of a ulti-layered arrangement of materials which singly or together provide particle and aerosol filtration and a level of fluid resistance. Examples of such masks are shown in United States Patents 3,985,132 issued October 12, 1976 to Boyce et al.; 4,323,063 issued April 6, 1982, to Fisichella; 4,606,341 issued August 29, 1986, to Hubbard et al.; and 4,688,566 issued August 25, 1987, to Boyce. Unfortunately, standard surgical masks provide limited liquid resistance and are able to filter only larger aerosol droplets of over 1 micron in size.
  • SUBSTITUTESHEET Similarly, a number of liquid resistant masks have been developed to help limit the effect of "strike through” of body fluids from the patient from reaching the membranes of the nose and mouth of the mask wearer. "Strike through” is defined as the passage of liquid through the layers of the surgical mask from the outside of the mask to the inside.
  • liquid resistant masks are treated with a liquid repellant material, such as fluoroalphatic resins, which increases the liquid resistance of the fabric.
  • a liquid repellant material such as fluoroalphatic resins
  • a more advanced system employs an embedded barrier, such as a perforated polyethylene sheet, to aid in avoiding liquid absorption.
  • an embedded barrier such as a perforated polyethylene sheet
  • the liquid resistance is increased both when dry and during wear.
  • increasing the density of the layers or increasing the number of layers increases the airflow resistance, causing the mask to be harder to breathe through.
  • shields may function adequately, they suffer from a number of distinct drawbacks.
  • Many of these devices are far too expensive to be made readily disposable, thus increasing the risk of contamination where shields are reused.
  • the present invention is a face mask which includes an integral liquid-impenetrable baffle to protect against strike- through of contaminates.
  • an integral liquid-impenetrable baffle to protect against strike- through of contaminates.
  • a baffle of a liquid barrier material is attached across the top of the mask and drapes down to cover the filtration layers of the mask, with an airspace between the baffle and the filtration layers sufficient to allow the passage of the breath of the wearer around the baffle.
  • a wire may be attached across the bottom of the baffle to allow the wearer to shape the baffle to conform to the wearer's face. The resultant curvature of the baffle imparts rigidity to the baffle and reduces the potential of the baffle moving into the field of vision of the wearer.
  • the baffle is attached to the filtration layer of the mask in several places horizontally across the face of the mask, billowing out therefrom. Resembling bellows, the baffle protrudes away from the mask's filtration layer, forming hollow tubes across the mask face. Inhaled and exhaled air is channeled through the tubes from and to the sides of the mask. The gathering of a surgical mask along the sides of the mask forces the tubes to remain open allowing free passage of the breath.
  • the mask of the present invention is a permanent liquid barrier which does not decrease in effectiveness during use. Since the baffle is an integral part of the mask structure in the present invention, this invention can be donned by the wearer in the same way as presently utilized surgical masks without extra steps, such as the attachment of a separate shield. The integral baffle is in place whenever the mask is worn, providing protection to the wearer that cannot be compromised by detachment of a shield. The contour of the mask against the face allows for minimal compromise of the field of vision and is fully compatible with other equipment, such as eyeglasses, eyeshields and magnifying units. DESCRIPTION OF THE DRAWINGS
  • Figure 1 is a side elevational view of one embodiment of a mask of the present invention shown attached to a wearer's face;
  • Figure 2 is a plan view of the mask of Figure 1, with its attachment means shown truncated;
  • Figure 3 is a side elevational view of a second embodiment of a mask of the present invention shown contoured to a person's face;
  • Figure 4 is a plan view of the mask of Figure 3, with its attachment means shown truncated;
  • Figure 5 is a side elevational view of a third embodiment of a mask of the present invention shown contoured to a person's face;
  • Figure 6 is a plan view of the mask of Figure 5, with is attachment means shown truncated.
  • the present invention is an improved face mask used to cover and protect the face of its wearer.
  • the mask of the present invention is particularly applicable for use in a health care environment, where it is not unusual for contaminated liquid to be sprayed in the direction of a health care worker's face, it should be appreciated that the mask of the present invention may also be used in any other environment where liquid strike-through protection is desired.
  • the mask 10 comprises a filtration layer 12 and a baffle layer 14.
  • the filtration layer is worn against a user's face 16, usually covering his or her nose and mouth, and is retained in place via tie strings 18 or similar attachment means.
  • the baffle 14 is designed to stand-off from the user's face 16 and the filtration layer 12 when worn, with an air space 20 established between the baffle 14 and the filtration layer 12.
  • baffle layer 14 is even constructed from an liquid impenetrable material, by simply isolating the filtration layer 12 from the baffle 14, liquid striking the baffle 14 cannot reach the filtration layer 12 and thus cannot be absorbed by it.
  • the baffle layer 14 comprises a generally rectangular sheet of clear plastic, such as a polyethylene or polypropylene plastic material, having an upper edge 21a, a lower edge 21b, and two side edges 21c, 21d.
  • the baffle 14 is attached to the filtration layer 12 only along its upper edge 21a to nose bridge 22.
  • the baffle layer 14 hangs freely down from the nose bridge 22 and inherently forms the necessary air space 20.
  • a distinct screen is created to shield the wearer from liquid spray and particularly spray originating from in front and below the wearer.
  • the nose bridge 22 of this construction includes a malleable seam 24 therein which permits it to be molded to fit snugly the contour of the wear's nose and face.
  • This bridge 22 may be constructed from any suitable material, such as flat aluminum wire.
  • this embodiment also includes a lower seam 26 attached to the baffle's lower edge 21b which provides additional mass to the baffle 14.
  • a oldable material 28 may also be provided in the baffle's lower seam 26 to allow it to be shaped to any desired orientation. It has been found that by forming the lower seam 26 in the arcuate shape shown in Figure 1, the baffle 14 tends to maintain its proper position through most common movements, even when the wearer needs to lean forward.
  • the mask 10 of the present invention provides a distinct barrier to liquid sprayed at a wearer's face.
  • a spray of liquid will simply strike the baffle 14 and drip off, with minimal risk of liquid strike-through or later absorption through the filter media.
  • the mask of the present invention provides unrestricted air flow to the wearer and avoids many of the problems encountered with previous liquid barriers.
  • the filtration layer may incorporate any applicable style, such as pleated, duck-billed, or cone, and most forms of filtration media.
  • the present invention may also be combined with other liquid-protection technology, such as polypropylene layering in the filtration media, or eyeshield protection.
  • the mask 10 of the present invention can be provided with any form of attachment means, such as tie strings 18 or elastic loops.
  • baffles 30, 32 are attached to filtration layer 34.
  • Each of the baffles 30, 32 are attached to the filtration layer 34 along an upper edge 36a, 38a, respectively.
  • they may be provided with the lower seam illustrated in Figures 1 and 2, and/or they can be anchored along side edges, 36b, 36c, and 38b, 38c.
  • each of the baffles 30, 32 will form a protruded orientation away from the filtration layer 34, with each maintaining an open air space 40, 42.
  • this embodiment contemplates a significant degree of overlap between or among multiple baffles so as to provide adequate protection when extended into an installed position on the wearer's face.
  • a further improvement contemplated by the present invention is to provide an absorbent layer on the baffle which will prevent liquid from dripping off onto a work surface.
  • an absorbent layer 44 comprises a polyester, rayon, cellulosic non-woven fabric, or similar material bonded to a substrate of impermeable material, such as polyethylene.
  • the baffles may be constructed from merely absorbent material alone. In such a case, any spray of liquid would merely be absorbed by the baffle and retained away from the filtration layer during use. Suitable materials for use under these circumstances include rayon, polyester, and cellulosic non-woven fabric.
  • the baffle 46 comprises a sheet of material anchored to a filtration layer 48 at its upper edge 50 and lower edge 52. By leaving sufficient slack in the material, the material forms a bellow 54, with its side edges 56, 58 billowing away from the filtration layer 48. This provides the desired air space 60 while permitting the free-flow of air around the side edges 56, 58.
  • the present invention may function adequately in this respect with a single bellow 54, it is preferred to form this baffle with a series of multiple bellows in the manner shown in Figures 5 and 6.
  • the multiple bellows can be formed by attaching to the filtration layer 48 a series of separate rectangular sheets arranged in parallel, with each sheet forming a bellow away from the filtration layer.
  • the multiple bellows can be formed as one or more larger rectangular sheets anchored at their upper and lower edges with an additional attachment (e.g. one or more parallel welds to the filtration layer) intermediate its upper and lower edges to form the bellowed configuration.
  • each bellow 54 i.e. that portion of the bellow which is furthest from the filtration layer when the bellow is fully extended
  • a further improvement which can be provided is to include an anti-microbial agent in the baffle. This acts to protect the wearer and also helps to limit contamination from run-off from the baffle. Suitable agents include quaternary ammonium compounds.
  • the mask of the present invention in no way stifles the ability of the wearer to breathe.
  • the substantial open air space or spaces provided with each of the embodiments of the present invention allows for the free movement of respiration to and from the exterior of the mask's filtration layer.
  • the mask is a simple one-piece unit, the barrier protection is provided each time it is worn. This avoids the all-too-common problem of wearers "forgetting" to apply it.
  • the barrier provided by the present invention is quite comfortable and is in no way unpleasant to wear. Not only is breathing through a mask of the present invention far easier than with other liquid-resistant masks, but it in no way obscures the user's vision or communication, as is often a problem with various face shield designs. Thus, the present invention is considered far more desirable to use than any other liquid- resistant barrier now available.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

La présente invention concerne un masque facial amélioré comportant une couche de filtration (12) et une chicane rapportée (14) pour protéger la couche de filtration du masque de l'exposition aux liquides. Dans une des nombreuses formes d'exécution décrites, la chicane est conçue pour être disposée à l'écart de la couche de filtration lorsque le masque est porté, de manière à former un espace d'air ouvert pour permettre une respiration libre. La chicane peut être constituée de matière imperméable aux liquides, de matière absorbant les liquides ou d'une combinaison des deux.
PCT/US1993/003478 1993-03-10 1993-04-13 Masque chirurgical avec une chicane incorporee constituant une barriere contre les liquides et/ou pour absorber les liquides Ceased WO1994019976A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU39779/93A AU3977993A (en) 1993-03-10 1993-04-13 Surgical mask with integral baffle for liquid proof barrier and/or liquid absorption

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2908693A 1993-03-10 1993-03-10
US08/029,086 1993-03-10

Publications (1)

Publication Number Publication Date
WO1994019976A1 true WO1994019976A1 (fr) 1994-09-15

Family

ID=21847134

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/003478 Ceased WO1994019976A1 (fr) 1993-03-10 1993-04-13 Masque chirurgical avec une chicane incorporee constituant une barriere contre les liquides et/ou pour absorber les liquides

Country Status (2)

Country Link
AU (1) AU3977993A (fr)
WO (1) WO1994019976A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997007696A1 (fr) * 1995-08-30 1997-03-06 Fern Lisa Walker Dispositif de protection du cou
US5720052A (en) * 1995-08-30 1998-02-24 Walker; Fern Lisa Neck protection device
EP0965280A3 (fr) * 1998-06-16 2000-02-23 SAN-M Package Co., Ltd. Masque préservant du passage d'un liquide extérieur
US6123077A (en) * 1995-03-09 2000-09-26 3M Innovative Properties Company Flat-folded personal respiratory protection devices and processes for preparing same
US6484722B2 (en) 1995-09-11 2002-11-26 3M Innovative Properties Company Flat-folded personal respiratory protection devices and processes for preparing same
US6886563B2 (en) 1995-03-09 2005-05-03 3M Innovative Properties Company Flat-folded personal respiratory protection devices and processes for preparing same
WO2006034227A3 (fr) * 2004-09-20 2006-06-15 California Pacific Med Center Masque facial
JP2019143289A (ja) * 2018-02-23 2019-08-29 アイリスオーヤマ株式会社 マスク

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE463397A (fr) *
US4821340A (en) * 1988-02-08 1989-04-18 Johnson April E Face shield
US4920960A (en) * 1987-10-02 1990-05-01 Tecnol, Inc. Body fluids barrier mask
US4944312A (en) * 1989-09-11 1990-07-31 Smith B Stewart Disposable face shield
EP0391725A1 (fr) * 1989-04-07 1990-10-10 JOHNSON & JOHNSON MEDICAL, INC. Procédé de fabrication d un masque respiratoire chargé électrostatiquement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE463397A (fr) *
US4920960A (en) * 1987-10-02 1990-05-01 Tecnol, Inc. Body fluids barrier mask
US4821340A (en) * 1988-02-08 1989-04-18 Johnson April E Face shield
EP0391725A1 (fr) * 1989-04-07 1990-10-10 JOHNSON & JOHNSON MEDICAL, INC. Procédé de fabrication d un masque respiratoire chargé électrostatiquement
US4944312A (en) * 1989-09-11 1990-07-31 Smith B Stewart Disposable face shield

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7069930B2 (en) 1995-03-09 2006-07-04 3M Innovative Properties Company Flat-folded personal respiratory protection devices and processes for preparing same
US6123077A (en) * 1995-03-09 2000-09-26 3M Innovative Properties Company Flat-folded personal respiratory protection devices and processes for preparing same
US6886563B2 (en) 1995-03-09 2005-05-03 3M Innovative Properties Company Flat-folded personal respiratory protection devices and processes for preparing same
WO1997007696A1 (fr) * 1995-08-30 1997-03-06 Fern Lisa Walker Dispositif de protection du cou
US5720052A (en) * 1995-08-30 1998-02-24 Walker; Fern Lisa Neck protection device
US5794276A (en) * 1995-08-30 1998-08-18 Walker; Fern Lisa Neck protection device
US6722366B2 (en) 1995-09-11 2004-04-20 3M Innovative Properties Company Method of making a flat-folded personal respiratory protection device
US6536434B1 (en) 1995-09-11 2003-03-25 3M Innovative Properties Company Flat-folded personal respiratory protection devices and processes for preparing same
US6715489B2 (en) 1995-09-11 2004-04-06 3M Innovative Properties Company Processes for preparing flat-folded personal respiratory protection devices
US6484722B2 (en) 1995-09-11 2002-11-26 3M Innovative Properties Company Flat-folded personal respiratory protection devices and processes for preparing same
SG86335A1 (en) * 1998-06-16 2002-02-19 San M Package Co Ltd Mask for preventing permeation of foreign material
EP0965280A3 (fr) * 1998-06-16 2000-02-23 SAN-M Package Co., Ltd. Masque préservant du passage d'un liquide extérieur
WO2006034227A3 (fr) * 2004-09-20 2006-06-15 California Pacific Med Center Masque facial
US7802572B2 (en) 2004-09-20 2010-09-28 Sutter West Bay Hospitals Face mask
JP2019143289A (ja) * 2018-02-23 2019-08-29 アイリスオーヤマ株式会社 マスク

Also Published As

Publication number Publication date
AU3977993A (en) 1994-09-26

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