US3890966A - Anti-fog surgical face mask with slits - Google Patents

Anti-fog surgical face mask with slits Download PDF

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Publication number
US3890966A
US3890966A US411872A US41187273A US3890966A US 3890966 A US3890966 A US 3890966A US 411872 A US411872 A US 411872A US 41187273 A US41187273 A US 41187273A US 3890966 A US3890966 A US 3890966A
Authority
US
United States
Prior art keywords
slits
face mask
flaps
mask
mask according
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.)
Expired - Lifetime
Application number
US411872A
Other languages
English (en)
Inventor
Gary Bertil Aspelin
Richard Francis Caffrey
William Lauer
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.)
Johnson and Johnson
Original Assignee
Johnson and Johnson
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 Johnson and Johnson filed Critical Johnson and Johnson
Priority to US411872A priority Critical patent/US3890966A/en
Priority to PH16438A priority patent/PH10923A/en
Priority to IT53797/74A priority patent/IT1021980B/it
Priority to DE2451402A priority patent/DE2451402C2/de
Priority to SE7413601A priority patent/SE406272B/xx
Priority to IN2361/CAL/74A priority patent/IN141920B/en
Priority to HUJO221A priority patent/HU169874B/hu
Priority to FR7436309A priority patent/FR2249644B1/fr
Priority to CH1456074A priority patent/CH578865A5/xx
Priority to ES431532A priority patent/ES431532A1/es
Priority to AR256329A priority patent/AR211092A1/es
Priority to NLAANVRAGE7414193,A priority patent/NL181332C/xx
Priority to NO743928A priority patent/NO137109C/no
Priority to BE150113A priority patent/BE821745R/fr
Priority to CS7400007442A priority patent/CS178831B2/cs
Priority to AT877474A priority patent/AT345960B/de
Priority to IE2243/74A priority patent/IE40097B1/xx
Priority to CA212,724A priority patent/CA1022701A/fr
Priority to DK569174AA priority patent/DK137214B/da
Priority to JP49124984A priority patent/JPS5810099B2/ja
Priority to FI3197/74A priority patent/FI57692C/fi
Priority to ZA00747018A priority patent/ZA747018B/xx
Priority to BR9117/74A priority patent/BR7409117A/pt
Priority to GB4736074A priority patent/GB1473925A/en
Priority to SU742078623A priority patent/SU587844A3/ru
Priority to RO7480386A priority patent/RO70409A/fr
Application granted granted Critical
Publication of US3890966A publication Critical patent/US3890966A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

  • ABSTRACT A surgical face mask comprising a filtration medium and a sheet of air impervious material, said sheet having slits which define flaps that are outwardly moveable under the influence of exhaled breath to provide paths for directing the flow of exhaled breath away from the eyes of the wearer of the mask.
  • Olderface masks which were made of folded squares of linen, gauze, or like materials, had relatively low air resistanceand were poor bacteria filters. Subsequently, face masks were made which were extremely good bacteria filters but, in general, had higher air resistance than the older masks.
  • the slits in the air impervious element must be so designed and so arranged as to preclude the flow of exhaled breath upwardly from the mask.
  • the slits whose total number may vary, may have different configurations, and may be arranged in avariety of alignments, so long as they are effective to direct substantially all the exhaled breath passing therethrough away from the eyes of the wearer of the mask.
  • an improved surgical face mask comprising a body portion having upper and lower parts, said body portion comprising a filtration medium for filtering bacteria, means for securing the mask over the mouth and nose of the wearer, and a sheet of air impervious material across the upper part of said body portion, said sheet of air impervious material having slits defining flaps which are outwardly movable under the influence of exhaled breath to provide paths for directing the flow of said exhaled breath away from eyes of the wearer of the mask.
  • FIG. 1 is a view of a first embodiment of the mask of this invention shown in position on the face of a wearer.
  • FIG. 2 is a plan view, with parts cut away, showing the outer surface of the mask of FIG. 1.
  • FIG. 3 is a plan view, with parts cut away, showing the inner surface of the mask of FIG. 1.
  • FIG. 4 is a cross sectional view taken along line 44 of FIG. 2.
  • FIG. 5 is a side view, partially in section, showing the mask of FIG. 1 in position on the face of a wearer.
  • FIG. 6 is a plan view showing slits of a different configuration.
  • FIG. 7 is a plan view showing slits of still another configuration.
  • FIG. 8 is a plan view showing a fourth configuration for the slits.
  • a flat face mask has a body portion which has two major surfaces. i.e., an inner major surface and an outer major surface, and which comprises a suitable filtration medium.
  • the body portion may include, if desired, a facing material disposed on one or both major surfaces of the filtration medium.
  • a flat face mask may be pleated or unpleated, as desired.
  • outside and outer surface refer to that portion, or surface, respectively, of the mask (or of any element thereof) which is disposed away from the face of the wearer when the mask is in place;
  • inside and inner surface refer to that portion, or surface, respectively, of the mask (or of any element thereof) which contacts or is disposed toward the face of the wearer when the mask is in place.
  • upper refers to that part of the mask (or of any element thereof) which is nearer the nose and eyes of the wearer when the mask is in place;
  • lower refers to that part of the mask (or of any element thereof) which is nearer the chin of the wearer when the mask is in place.
  • Face mask 20 includes a body portion 21 which has a binding 24 along its upper edge and a binding 25 along its lower edge.
  • Body portion 21 also has bindings 23 along the side edges thereof which bindings may be extended at the corners of the mask, if desired to provide tie strings 28 which may be tied at the back of the head of the wearer as shown at 26 of FIG. 1 in order to secure the mask in its desired position.
  • side bindings 23 and tie strings 28 may comprise biased fabric tapes and may, if desired, have elastic characteristics.
  • the upper, outer surface of body portion 21 carries a sheet 30 of air impervious material which has generally arcuate slits 30 therein.
  • the upper portion of mask carries a nose clip 27 which may be formed, for example, from a thin strip of aluminum.
  • main body portion 21 is folded to form pleats 29 which unfold to better conform the mask to the face of the wearer when the mask is put on.
  • mask 20 is provided with a sheet 30 of air impervious material which is disposed across the upper outer surface of the mask. Sheet 30 may be secured to body portion 21 by any suitable securing means as described more fully in the aforementioned copending application.
  • Sheet 30 has slits 31 cut therein which define downwardly projecting flaps 32 best seen in FIG. 5.
  • Slits 31 have a generally arcuate configuration and have an arc distance approximately equal to A; the circumference ofa 5/16 inch diameter circle.
  • slits 31 are arranged in two rows running from one side of the mask to the other. The slits in each row are arranged in pairs, there being six pairs of slits per row. In the embodiment of FIG. 2, the distance 1) between one slit of a first pair and the adjacent slit of the next adjacent pair is about three times the distance a between the slits comprising a pair.
  • There are twenty-four arcuate slits 31 cut into sheet 30 which measures about 1 /2 inches vertically and about 6% inches between the inward edges of side bindings 23.
  • the inner surface of the first embodiment carries bindings 23, 24, which are merely folded-over portions of the corresponding bindings on the outer surface of the mask.
  • the folded bindings are secured to body portion 21 by stitching, indicated by dotted lines 18 in FIGS. 2 and 3.
  • sheet of air impervious material has been folded over the upper edge of mask 20 and continued downwardly along the inner surface of the mask. That part of sheet 30 that lies along the inner surface of the mask has no slits.
  • Sheet 30 is secured only along its upper and side peripheries to the inner and outer surfaces of the mask, thereby providing sheet 30 with a flap-like" arrangement, best seen in FIG. 4. This flap-like arrangement of sheet 30 is explained in greater detail in the aforementioned copending patent application.
  • the flap-like arrangement of sheet 30 of air impervious material which allows the greater part thereof to move more or less independently of the outer surface of body portion 21, is to be distinguished from the flaps defined in sheet 30 by the slits 31 cut therein.
  • FIG. 5 there is shown a side view, partially in section, of the mask of FIGS. l-4 in position on the face of a wearer.
  • Flaps 32 which are defined by slits 31,-areillustrated in FIG. 5 in a slightly uplifted position. As indicated by the arrows, these flaps are outwardly movable to provide paths through which exhaled breath may flow. Any exhaled breath flowing in this manner is directed away from the eyeglasses of the wearer, thus substantially overcoming any tendency of the moist breath to rise upwardly and cause eyeglass fogging.
  • FIGS. 6, 7 and 8 there are illustrated various other slit configurations and arrangements which are effective in providing sites for the passage of exhaled breath while at the same time preventing fogging of eyeglasses.
  • a series of V- shaped slits has been cut into sheet 34 of air impervious material to form triangular flaps 36 whose apices are pointing toward the lower part of the mask.
  • the sides of the V-shaped slits are about 3/16 of an inch in length and define an angle a of about
  • the length of the sides of the V-shaped slits may be varied from about /s of an inch to about of an inch, and the angle a may range from about 75 to about
  • the slits defining flaps 36 are arranged in the same fashion described earlier for slits 31 in FIG. 2.
  • slits have been cut into sheet 44 of air impervious material to form rectangular flaps 46 having vertical sides 46a and a horizontal side 46b.
  • Vertical sides 46a are about A; inch in length and form angles of 90 with horizontal side 46b which is about A inch long.
  • the length of sides 46a may be varied from about somewhat less than /3 inch to about /s inch, while that of side 46b may be varied from about /s inch to about /8 inch. As illustrated in FIG. 7, the length of side 46b is preferably longer than the length of a side 46a.
  • the lengths of sides 46a and side 46b may be varied to produce other rectangular flap configurations. For example, the lengths of sides 46a may be made equal to the length of side 46b, thus producing square flaps in sheet 44. Other modifications of the embodiment of FIG. 7 may also be made. For example, the length of side 46b of flap 46 may be increased to provide horizontally elongated flaps; similarly, the length of sides 46a of flap 46 may be increased to provide vertically elongated flaps.
  • flaps there are 22-24 flaps in the embodiment shown in FIG. 7, and the flaps are arranged in two rows.
  • the total number of flaps may be varied from about 10 to about 26, the exact number depending, of course, on the configuration and dimensions of the flap.
  • the slits in a given row are spaced singly, that is, an equal distance apart, rather than in pairs as described for the previous embodiments.
  • flaps 36, 46, and 56 are effective to prevent eyeglass fogging and, at the same time,
  • the sheet of air impervious material may comprise a soft. pliable film of plastic material such as polyethylene. polypropylene. poly(ethylene-vinyl acetate), polyvinyl chloride and the like.
  • the slits may be formed in the air impervious material in any desired manner; a steel die carrying the desired slit configuration has been found suitable in our work.
  • the dimensions of the various slits are not critical and may be increased or decreased as suggested herein if desired.
  • the configuration of the flaps defined by the slits is not particularly critical and may also be varied so long as the flaps serve to direct exhaled breath away from the eyes of the wearer. It will be evident that the number of slits, the grouping of the slits, and the number of rows of slits may be varied from those recited above in the description of the preferred embodiments without departing from the spirit or scope of the present invention.
  • the noun slit as used herein refers generally to an opening made in the sheet of air impervious material with an edged instrument such as a razor blade or a thin edged metal die.
  • an edged instrument such as a razor blade or a thin edged metal die.
  • a surgical face mask comprising a body portion having upper and lower parts, said body portion comprising a filtration medium for filtering bacteria.
  • said sheet of air impervious material having slits defining downwardly extending flaps which are outwardly movable under the influence of exhaled breath to provide paths for directing the flow of said exhaled breath away from the eyes of the wearer.
  • a face mask according to claim 1 wherein said slits are generally V-shaped, and define triangular flaps whose apices are directed toward the lower part of the mask.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Compositions Of Oxide Ceramics (AREA)
US411872A 1973-11-01 1973-11-01 Anti-fog surgical face mask with slits Expired - Lifetime US3890966A (en)

Priority Applications (26)

Application Number Priority Date Filing Date Title
US411872A US3890966A (en) 1973-11-01 1973-11-01 Anti-fog surgical face mask with slits
PH16438A PH10923A (en) 1973-11-01 1974-10-22 Anti-fog surgical face mask with slite
DE2451402A DE2451402C2 (de) 1973-11-01 1974-10-29 Chirurgische Gesichtsmaske
SE7413601A SE406272B (sv) 1973-11-01 1974-10-29 Kirurgisk ansiktsmask
IT53797/74A IT1021980B (it) 1973-11-01 1974-10-29 Perfezionamento nelle maschere per chirurghi
IN2361/CAL/74A IN141920B (fr) 1973-11-01 1974-10-29
FR7436309A FR2249644B1 (fr) 1973-11-01 1974-10-30
CH1456074A CH578865A5 (fr) 1973-11-01 1974-10-30
ES431532A ES431532A1 (es) 1973-11-01 1974-10-30 Mejoras introducidas en mascarillas quirurgicas.
AR256329A AR211092A1 (es) 1973-11-01 1974-10-30 Mascara de cirujano.
NLAANVRAGE7414193,A NL181332C (nl) 1973-11-01 1974-10-30 Gezichtsmasker.
HUJO221A HU169874B (fr) 1973-11-01 1974-10-30
NO743928A NO137109C (no) 1973-11-01 1974-10-31 Kirurgisk ansiktsmaske med slisser for } hindre dugging
CS7400007442A CS178831B2 (en) 1973-11-01 1974-10-31 Face mask, especially for surgeons
AT877474A AT345960B (de) 1973-11-01 1974-10-31 Chirurgische gesichtsmaske
IE2243/74A IE40097B1 (en) 1973-11-01 1974-10-31 Surgical face mask
CA212,724A CA1022701A (fr) 1973-11-01 1974-10-31 Masque de chirurgie antibuee a rainures
DK569174AA DK137214B (da) 1973-11-01 1974-10-31 Ansigtmaske, især til operationsstuepersonale.
JP49124984A JPS5810099B2 (ja) 1973-11-01 1974-10-31 スリツトツキボウドンゲカヨウガンメンマスク
FI3197/74A FI57692C (fi) 1973-11-01 1974-10-31 Ansiktsmask foer kirurg
BE150113A BE821745R (fr) 1973-11-01 1974-10-31 Masque chirugical antibuee
BR9117/74A BR7409117A (pt) 1973-11-01 1974-10-31 Mascara facial cirurgica
ZA00747018A ZA747018B (en) 1973-11-01 1974-10-31 Anti-fog surgical face mask with slits
GB4736074A GB1473925A (en) 1973-11-01 1974-11-01 Surgical face mask
SU742078623A SU587844A3 (ru) 1973-11-01 1974-11-01 Хирургическа лицева маска
RO7480386A RO70409A (fr) 1973-11-01 1974-11-01 Masque a visage medicalle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US411872A US3890966A (en) 1973-11-01 1973-11-01 Anti-fog surgical face mask with slits

Publications (1)

Publication Number Publication Date
US3890966A true US3890966A (en) 1975-06-24

Family

ID=23630641

Family Applications (1)

Application Number Title Priority Date Filing Date
US411872A Expired - Lifetime US3890966A (en) 1973-11-01 1973-11-01 Anti-fog surgical face mask with slits

Country Status (26)

Country Link
US (1) US3890966A (fr)
JP (1) JPS5810099B2 (fr)
AR (1) AR211092A1 (fr)
AT (1) AT345960B (fr)
BE (1) BE821745R (fr)
BR (1) BR7409117A (fr)
CA (1) CA1022701A (fr)
CH (1) CH578865A5 (fr)
CS (1) CS178831B2 (fr)
DE (1) DE2451402C2 (fr)
DK (1) DK137214B (fr)
ES (1) ES431532A1 (fr)
FI (1) FI57692C (fr)
FR (1) FR2249644B1 (fr)
GB (1) GB1473925A (fr)
HU (1) HU169874B (fr)
IE (1) IE40097B1 (fr)
IN (1) IN141920B (fr)
IT (1) IT1021980B (fr)
NL (1) NL181332C (fr)
NO (1) NO137109C (fr)
PH (1) PH10923A (fr)
RO (1) RO70409A (fr)
SE (1) SE406272B (fr)
SU (1) SU587844A3 (fr)
ZA (1) ZA747018B (fr)

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EP0081943A1 (fr) * 1981-12-10 1983-06-22 Minnesota Mining And Manufacturing Company Masque chirurgical anti-buée
US4606341A (en) * 1985-09-23 1986-08-19 Tecnol, Inc. Noncollapsible surgical face mask
US4635628A (en) * 1985-09-11 1987-01-13 Tecnol, Inc. Surgical face mask with improved moisture barrier
US4662005A (en) * 1984-08-06 1987-05-05 Kimberly-Clark Corporation Conformable surgical face mask
WO1989010106A1 (fr) * 1988-04-22 1989-11-02 John Patrick Russell Protecteur facial
US4941470A (en) * 1983-11-07 1990-07-17 Tecnol, Inc. Face mask with ear loops and method for forming
US5107547A (en) * 1991-01-10 1992-04-28 Baxter International Inc. Adjustable medical face mask fastener
US5694925A (en) * 1994-07-20 1997-12-09 Tecnol Medical Products, Inc. Face mask with enhanced seal and method
US5694927A (en) * 1995-11-08 1997-12-09 Bohmfalk; George L. Disposable mask and suction catheter
US5699792A (en) * 1994-07-20 1997-12-23 Tecnol Medical Products, Inc. Face mask with enhanced facial seal
US5704349A (en) * 1987-10-02 1998-01-06 Tecnol Medical Products, Inc. Surgical face mask with darkened glare-reducing strip and visor
US5706804A (en) * 1996-10-01 1998-01-13 Minnesota Mining And Manufacturing Company Liquid resistant face mask having surface energy reducing agent on an intermediate layer therein
US5724964A (en) * 1993-12-15 1998-03-10 Tecnol Medical Products, Inc. Disposable face mask with enhanced fluid barrier
US5765556A (en) * 1992-12-16 1998-06-16 Tecnol Medical Products, Inc. Disposable aerosol mask with face shield
US5813398A (en) * 1996-03-29 1998-09-29 Tecnol Medical Products, Inc. Combined anti fog and anti glare features for face masks
US6354296B1 (en) 1998-03-16 2002-03-12 3M Innovative Properties Company Anti-fog face mask
US6754909B1 (en) * 2003-05-21 2004-06-29 John Samelian Neck gator
WO2005021075A1 (fr) 2003-09-03 2005-03-10 Fisher & Paykel Healthcare Limited Masque
US20050133035A1 (en) * 2003-12-18 2005-06-23 Kimberly-Clark Worldwide, Inc. Facemasks containing an anti-fog / anti-glare composition
US6988500B1 (en) * 2003-05-15 2006-01-24 J. Palmero Sales Company, Inc. Fog free medical face mask
US20060237018A1 (en) * 2000-06-14 2006-10-26 Mcauley Alastair E Breathing assistance apparatus
US20080047557A1 (en) * 2000-06-14 2008-02-28 Gradon Lewis G Breathing assistance apparatus
WO2008109438A3 (fr) * 2007-03-02 2008-10-16 Anne Mcintosh Puckett Masque facial antimicrobien transparent
US20080271737A1 (en) * 2007-05-03 2008-11-06 3M Innovative Properties Company Maintenance-free anti-fog respirator
US20100319105A1 (en) * 2009-06-23 2010-12-23 Cody Fairbanks Facial Spacer Device and Associated Methods
US20160367842A1 (en) * 2009-04-29 2016-12-22 Richard H. Koehler Surgical face mask, including reusable masks, with filtered inhalation and exhalation valves
CN106360847A (zh) * 2016-11-17 2017-02-01 季忠杰 一种具有外置过滤装置的口罩
US9868002B2 (en) 2014-07-17 2018-01-16 3M Innovative Properties Company Respirator including contrast layer
USD823454S1 (en) 2017-02-23 2018-07-17 Fisher & Paykel Healthcare Limited Cushion assembly for breathing mask assembly
USD823455S1 (en) 2017-02-23 2018-07-17 Fisher & Paykel Healthcare Limited Cushion assembly for breathing mask assembly
USD824020S1 (en) 2017-02-23 2018-07-24 Fisher & Paykel Healthcare Limited Cushion assembly for breathing mask assembly
US10357672B2 (en) * 2016-08-02 2019-07-23 Navin Raj Bora Apparatus, system and method to prevent fogging of eyewear
US10518054B2 (en) 2014-08-25 2019-12-31 Fisher & Paykel Healthcare Limited Respiratory mask and related portions, components or sub-assemblies
US10603456B2 (en) 2011-04-15 2020-03-31 Fisher & Paykel Healthcare Limited Interface comprising a nasal sealing portion
USD882066S1 (en) 2016-05-13 2020-04-21 Fisher & Paykel Healthcare Limited Frame for a breathing mask
US10639506B2 (en) 2013-08-20 2020-05-05 3M Innovative Properties Company Personal respiratory protection device
CN111544792A (zh) * 2020-05-18 2020-08-18 安徽众衣联供应链管理服务有限公司 一种一次性卫生防疫面罩
US10828442B2 (en) 2011-04-15 2020-11-10 Fisher & Paykel Healthcare Limited Interface comprising a rolling nasal bridge portion
US10827788B2 (en) 2014-11-13 2020-11-10 O&M Haylard, Inc. Anti-fog, anti-glare facemasks
US10946155B2 (en) 2012-09-04 2021-03-16 Fisher & Paykel Healthcare Limited Valsalva mask
US11154735B2 (en) 2013-08-20 2021-10-26 3M Innovative Properties Company Personal respiratory protection device
US20210361002A1 (en) * 2020-05-25 2021-11-25 Savanna Eve Allmon Face mask with adjustable ear loops
US11241595B2 (en) 2013-08-20 2022-02-08 3M Innovative Properties Company Personal respiratory protection device
US11247079B2 (en) 2013-08-20 2022-02-15 3M Innovative Properties Company Personal respiratory protection device
WO2022046000A1 (fr) * 2020-08-25 2022-03-03 Almaxtex Tekstil Sanayi Ve Ticaret Anonim Sirketi Tissu d'équipement de protection individuelle et équipement de protection individuelle fabriqué à partir dudit tissu
WO2022055775A1 (fr) * 2020-09-10 2022-03-17 Kiarash Ahi Masque médical facial antibuée et dispositif pour empêcher la formation de buée sur des lunettes lors du port d'une protection faciale
US11413481B2 (en) 2015-05-12 2022-08-16 3M Innovative Properties Company Respirator tab
KR20220130361A (ko) 2021-03-18 2022-09-27 주식회사 엠팩플러스 다회용 듀얼 마스크
US20230111220A1 (en) * 2021-10-07 2023-04-13 Adam Magdi Lamei Khalil Protective face mask
US11813581B2 (en) 2017-07-14 2023-11-14 3M Innovative Properties Company Method and adapter for conveying plural liquid streams
US11877604B2 (en) 2007-05-03 2024-01-23 3M Innovative Properties Company Maintenance-free respirator that has concave portions on opposing sides of mask top section
US12017005B2 (en) 2015-03-04 2024-06-25 Fisher & Paykel Healthcare Limited Mask system headgear

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GR1001027B (el) * 1989-04-07 1993-03-31 Johnson & Johnson Medical Βελτιωμενο μεσο φιλτραρισματος και μασκα καλυψεως προσωπου η οποια περιλαμβανει αυτο.
US5706803A (en) * 1995-06-06 1998-01-13 Bayer; Robert T. Disposable face mask and method of manufacture
US5701892A (en) * 1995-12-01 1997-12-30 Bledstein; Adrien Janis Multipurpose face mask that maintains an airspace between the mask and the wearer's face
JP2008093285A (ja) * 2006-10-13 2008-04-24 Hiroko Yoshimoto マスク
RU2550329C2 (ru) * 2013-07-05 2015-05-10 Александр Александрович Атрошенко Полумаска фильтрующая для защиты от аэрозолей и пыли
JP5463481B1 (ja) * 2013-07-24 2014-04-09 一恵 漆原 マスク
FR3119519B1 (fr) * 2021-02-10 2024-04-19 Faytre Jerome Dispositif anti-buée adaptable sur un masque de protection respiratoire

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Also Published As

Publication number Publication date
ES431532A1 (es) 1976-11-01
DE2451402A1 (de) 1975-05-07
FI57692B (fi) 1980-06-30
DE2451402C2 (de) 1984-10-04
FI319774A (fr) 1975-05-02
FR2249644A1 (fr) 1975-05-30
NO137109B (no) 1977-09-26
IT1021980B (it) 1978-02-20
NO137109C (no) 1978-01-04
DK569174A (fr) 1975-06-23
JPS5810099B2 (ja) 1983-02-24
NL181332C (nl) 1987-08-03
CA1022701A (fr) 1977-12-20
DK137214B (da) 1978-02-06
PH10923A (en) 1977-10-05
AT345960B (de) 1978-10-10
FR2249644B1 (fr) 1978-09-29
IN141920B (fr) 1977-04-30
DK137214C (fr) 1978-07-10
CH578865A5 (fr) 1976-08-31
NO743928L (fr) 1975-05-26
NL7414193A (nl) 1975-05-06
SE7413601L (fr) 1975-05-02
NL181332B (nl) 1987-03-02
GB1473925A (en) 1977-05-18
SE406272B (sv) 1979-02-05
ATA877474A (de) 1978-02-15
ZA747018B (en) 1976-06-30
IE40097L (en) 1975-05-01
JPS5078181A (fr) 1975-06-25
AR211092A1 (es) 1977-10-31
BE821745R (fr) 1975-04-30
RO70409A (fr) 1980-07-15
BR7409117A (pt) 1975-11-04
CS178831B2 (en) 1977-10-31
HU169874B (fr) 1977-02-28
IE40097B1 (en) 1979-03-14
SU587844A3 (ru) 1978-01-05
FI57692C (fi) 1980-10-10

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