US20080271739A1 - Maintenance-free respirator that has concave portions on opposing sides of mask top section - Google Patents

Maintenance-free respirator that has concave portions on opposing sides of mask top section Download PDF

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Publication number
US20080271739A1
US20080271739A1 US11/743,734 US74373407A US2008271739A1 US 20080271739 A1 US20080271739 A1 US 20080271739A1 US 74373407 A US74373407 A US 74373407A US 2008271739 A1 US2008271739 A1 US 2008271739A1
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US
United States
Prior art keywords
mask body
maintenance
respirator
perimeter
free respirator
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.)
Abandoned
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US11/743,734
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English (en)
Inventor
John M. Facer
Christopher P. Henderson
Peter S. Leonard
Desmond T. Curran
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3M Innovative Properties Co
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3M Innovative Properties Co
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39683913&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20080271739(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Priority to US11/743,734 priority Critical patent/US20080271739A1/en
Assigned to 3M INNOVATIVE PROPERTIES COMPANY reassignment 3M INNOVATIVE PROPERTIES COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CURRAN, DESMOND T., FACER, JOHN M., LEONARD, PETER S., HENDERSON, CHRISTOPHER P.
Priority to KR1020167024502A priority patent/KR20160108604A/ko
Priority to PCT/US2008/056370 priority patent/WO2008137205A1/en
Priority to AT08731790T priority patent/ATE531284T1/de
Priority to KR1020097024078A priority patent/KR101716495B1/ko
Priority to CN2008800139712A priority patent/CN101668445B/zh
Priority to EP11183704A priority patent/EP2428127A3/en
Priority to BRPI0809786-0A priority patent/BRPI0809786B1/pt
Priority to EP08731790A priority patent/EP2175751B1/en
Priority to JP2010506355A priority patent/JP2010525875A/ja
Priority to PL08731790T priority patent/PL2175751T3/pl
Publication of US20080271739A1 publication Critical patent/US20080271739A1/en
Priority to US15/726,723 priority patent/US10827787B2/en
Priority to US16/948,919 priority patent/US11877604B2/en
Priority to US18/357,392 priority patent/US20230363475A1/en
Abandoned legal-status Critical Current

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    • 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
    • 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
    • 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
    • A41D13/1123—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a duckbill configuration
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/02—Masks
    • A62B18/025—Halfmasks
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A62B18/084—Means for fastening gas-masks to heads or helmets
    • 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 present invention pertains to a maintenance-free respirator that has a perimeter that includes first and second concave segments that are located on the top section of the mask body.
  • the concave segments are disposed on opposing sides of a central plane that bisects the mask body.
  • Maintenance-free respirators are worn over the breathing passages of a person for two common purposes: (1) to prevent impurities or contaminants from entering the wearer's breathing track; and (2) to protect other persons or things from being exposed to pathogens and other contaminants exhaled by the wearer.
  • the maintenance-free respirator is worn in an environment where the air contains particles that are harmful to the wearer, for example, in an auto body shop.
  • the respirator is worn in an environment where there is risk of contamination to others persons or things, for example, in an operating room or clean room.
  • maintenance-free respirators Unlike respirators that use rubber or elastomeric mask bodies and attachable filter cartridges or insert-molded filter elements (see, e.g., U.S. Pat. No. 4,790,306 to Braun), maintenance-free respirators have the filter media incorporated into the mask body so that there is no need for installing or replacing filter cartridges. As such, maintenance-free respirators are relatively light in weight and easy to use.
  • the maintenance-free respirator should be comfortable and be able to maintain a snug fit when placed on the wearer's face.
  • Known maintenance-free respirators can, for the most part, match the contour of a person's face over the cheeks and chin. In the nose region, however, there is a complex change in contour, which makes a snug fit more challenging to achieve, particularly over the nose and beneath each eye of the wearer. Failure to obtain a snug fit on this part of a wearer's face can allow air to enter or exit the respirator interior without passing through the filter media. If such an event were to occur, contaminants could possibly enter the wearer's breathing track or other persons or things could be exposed to contaminants exhaled by the wearer. In addition, the wearer's eyewear may become fogged, which, of course, makes visibility more troublesome to the wearer and creates unsafe conditions for the user and others.
  • respirator users often also need to wear protective eyewear.
  • the respirator may, for example, hinder the eyewear from properly resting on the wearer's face.
  • Nose clips are commonly used on respirators to achieve a snug fit over the wearer's nose.
  • Conventional nose clips have used a malleable, linear, strip of aluminum—see, for example, U.S. Pat. Nos. 5,307,796, 4,600,002, 3,603,315; see also U.K. Patent Application GB 2,103,491 A.
  • More recent products have used an “M” shaped band of malleable metal to improve fit in the nose area—see U.S. Pat. No. 5,558,089 and Des. 412,573 to Castiglione—or spring loaded and deformable plastics—see U.S. Publication No. US2007/0044803A1 and U.S. patent application Ser. No. 11/236,283.
  • Nose foams also have been used on the top section of the mask to improve wearer comfort and fit—see U.S. patent application Ser. Nos. 11/553,082 and 11/459,949.
  • nose clips and nose foams do assist in improving comfort and in providing a snug fit over the wearer's nose, there nonetheless may be room for improvement in comfort and fit in the region beneath each of the wearer's eyes. If such improvements in comfort and fit can be achieved by altering the structure of the mask body, the respirator wearer is less likely to displace the mask from their face when in a contaminated environment. Fit improvements also may help alleviate conflicts between maintenance-free respirators and protective eyewear.
  • the present invention is directed to improving the compatibility between maintenance-free respirators and protective eyewear while still achieving a snug fit over the wearer's nose and eyes.
  • the inventive maintenance-free respirator comprises a mask body that includes at least one layer of filter media.
  • the mask body also has a perimeter that includes an upper segment that has first and second concave segments located, respectively, on first and second sides of a central plane when viewing the mask body from a top view.
  • a harness is secured to the mask body so that it can be supported on a wearer's face.
  • the present invention differs from conventional respirators in that the mask body is sculpted along the upper segment of the perimeter.
  • the mask body includes first and second concave segments that are located on opposing sides of a central plane that bisects a top view of the mask.
  • the concave segments resemble “dips” or “cut-outs” in the path traced by the mask body perimeter when viewed through a plane projected onto the top of the mask body (see FIG. 5 a ).
  • the perimeter primarily exhibited only a generally straight line or perhaps a constant arc when viewed through such a plane.
  • the inventors discovered that a good, comfortable, snug fit may be achieved while also preventing fogging of the wearer's eyewear and improving the compatibility between a maintenance-free respirator and the protective eyewear.
  • central plane means a plane that bisects the mask normally or perpendicular to its crosswise dimension
  • clean air means a volume of atmospheric ambient air that has been filtered to remove contaminants
  • “concave” means that a line tangent to the path of the perimeter segment decreases in slope and then increases in slope when moving along the perimeter path from left to right in the “y” direction ( FIG. 5 a );
  • contaminants means particles (including dusts, mists, and fumes) and/or other substances that generally may not be considered to be particles (e.g., organic vapors, et cetera) but which may be suspended in air, including air in an exhale flow stream;
  • crosswise dimension is the dimension that extends across a wearer's nose when the respirator is worn; it is synonymous with the “lengthwise” dimension of the mask body (“y” direction noted in FIG. 5 a );
  • exitterior gas space means the ambient atmospheric gas space into which exhaled gas enters after passing through and beyond the mask body and/or exhalation valve;
  • filter or “filtration layer” means one or more layers of material, which layer(s) is adapted for the primary purpose of removing contaminants (such as particles) from an air stream that passes through it;
  • filter media means an air-permeable structure that is designed to remove contaminants from air that passes through it;
  • “harness” means a structure or combination of parts that assists in supporting a mask body on a wearer's face
  • Interior gas space means the space between a mask body and a person's face
  • line of demarcation means a fold, seam, weld line, bond line, stitch line, hinge line, and/or any combination thereof;
  • “maintenance-free” means that the mask body itself is designed to filter air that passes through it—there are no separately identifiable filter cartridges or inserted-molded filter elements attached to or molded into the mask body to achieve this purpose;
  • mask body means an air-permeable structure that can fit at least over the nose and mouth of a person and that helps define an interior gas space separated from an exterior gas space;
  • molded means causing the element being molded (for example, the shaping layer) to take on a predefined form after being exposed to heat and/or pressure;
  • nose clip means a mechanical device—other than a nose foam—which device is adapted for use on a mask body to improve the seal at least around a wearer's nose;
  • nose foam means a foam-type material that is adapted for placement on the interior of a mask body to improve fit and/or wearer comfort over the nose when the respirator is being worn by a person;
  • nose region means the portion that resides over a person's nose when the respirator is worn
  • peripheral means the outer edge of the mask body, which outer edge would be disposed proximate to a wearer's face when the respirator is being donned by a person;
  • respirator means a device that is worn by a person to filter air before the air enters the wearer's respiratory system
  • shaping layer means a layer that has sufficient structural integrity to retain its desired shape (and the shape of other layers that are supported by it) under normal handling;
  • top section means the portion that is located on the upper half of the mask body and that would extend over the nose and beneath the eyes when the respirator is being worn;
  • top view means the view that when projected onto a plane (as seen in FIG. 5 a ) the perimeter or rear of the mask body is located towards the top of the page and the front faces the bottom;
  • upper segment means the part of the perimeter that extends over the nose region and under the wearer's eyes when the respirator is being worn.
  • FIG. 1 illustrates a perspective view of an exemplary respirator 10 in accordance with the present invention
  • FIG. 2 illustrates a front view of the respirator 10 in accordance with the present invention
  • FIG. 3 illustrates a rear view of the respirator mask body 11 in accordance with the present invention
  • FIG. 4 illustrates a right side view of the respirator 10 in accordance with the present invention
  • FIG. 5 a illustrates a top view of the mask body 11 in accordance with the present invention
  • FIG. 5 b is an enlarged view of the top view first concave segment 36 shown in FIG. 5 a;
  • FIG. 6 illustrates a rear view of the mask body 11 in a folded condition
  • FIG. 7 is a cross-sectional view of the mask body 11 taken along lines 7 - 7 of FIG. 6 ;
  • FIGS. 8 a and 8 b show enlarged cross-sections of the central and top panels, respectively.
  • a new maintenance-free respiratory mask which addresses the need for improved comfort and fit in the top section of the mask.
  • the inventive respirator is given a perimeter that includes an upper segment that comprises first and second concave segments. These concave segments are located respectively on first and second sides of a bisecting central plane when viewing the mask body from a top view.
  • the first and second concave segments may be provided as “cut-outs” from the configuration of known prior art masks such as the 3M Brand 9000 Series flat fold mask.
  • FIGS. 1-5 illustrate an example of a new flat-fold, maintenance-free, respiratory mask 10 that includes a mask body 11 that has a top section or panel 12 , a central panel 14 , and a bottom panel 16 .
  • the panels 12 , 14 , and 16 are illustrated in an open condition—that is, the respirator 10 is ready for donning by a person.
  • the central panel 14 is separated from the top panel 12 and the bottom panel 16 by first and second lines of demarcation 18 and 20 .
  • the top and bottom panels 12 and 16 may each be folded inward towards the backside of the central panel 14 when the mask is being stored ( FIGS. 6-7 ) and may be opened outward for placement on a wearer's face ( FIGS. 1-5 ).
  • the top and bottom panels 12 and 16 When the mask body 11 is taken from its open configuration to its closed configuration or vice versa, the top and bottom panels 12 and 16 , respectively, rotate about the first and second lines of demarcation 18 and 20 . In this sense, the first and second lines of demarcation 18 and 20 act as first and second hinges or axis, respectively, for the top and bottom panels 12 and 16 .
  • the respirator 10 may also be provided with first and second flanges or tabs 22 and 24 that provide a region for securement of a harness that may include straps or elastic bands 26 .
  • U.S. Pat. D449,377 to Henderson et al. shows an example of tabs that can be used as strap securement regions.
  • the straps or bands 26 may be stapled, glued, welded, or otherwise secured to the mask body 11 at each flange 22 , 24 to hold the mask body 11 against the wearer's face.
  • An example of a compression element that could be used to fasten a harness to a mask body using ultrasonic welding is described in U.S. Pat. Nos. 6,729,332 and 6,705,317 to Castiglione.
  • the band could also be welded directly to the mask body without using a separate attachment element—see U.S. Pat. No. 6,332,465 to Xue et al. Examples of other harnesses that could possibly be used are described in U.S. Pat. No. 5,394,568 to Brostrom et al. and U.S. Pat. No.
  • the top panel 12 may include a nose clip 28 that is made from a malleable strip of metal such as aluminum, which metal strip can be conformed by mere finger pressure to adapt the respirator to the configuration of the wearer's face in the nose region. Suitable nose clips are cited above in the Background section.
  • the nose clip can be disposed on the mask exterior or interior or may be disposed between the various layers that comprise the mask body.
  • the respirator 10 may also include a nose foam 30 that is disposed inwardly along the mask body perimeter 32 of the top panel 12 .
  • a nose foam 30 that is disposed inwardly along the mask body perimeter 32 of the top panel 12 .
  • suitable nose foams are also mentioned above in the Background section of this document.
  • the nose foam could extend around the whole inner perimeter of the mask body and could include a thermochromic fit-indicating material that contacts the wearer's face when the mask is worn. Heat from the facial contact causes the thermochromic material to change color to allow the wearer to determine if a proper fit has been established—see U.S. Pat. No. 5,617,749 to Springett et al.
  • the mask body 11 also can have its intrinsic structure altered in the top section to increase pressure drop in that portion of the mask body so that eyewear fogging is less likely to occur—see copending U.S. patent application Ser. No. ______, entitled Maintenance-Free Anti-Fog Respirator, filed on the same day as the present document under attorney case number 63051US002.
  • FIGS. 5 a and 5 b show that the mask body perimeter 32 has an upper segment 34 that comprises first and second concave segments 36 and 38 that are located, respectively, on first and second sides of a central plane 40 when viewing the mask body 11 through a plane projected onto a top view of the respirator.
  • the nose clip 28 and the arrow line that represents the length of the upper segment 34 of the perimeter extends in the crosswise dimension of the mask body 11 .
  • the mask body perimeter 32 is shaped to contact the wearer's face over the nose bridge, across and around the cheeks, and under the chin.
  • the mask body 11 forms an enclosed space around the nose and mouth of the wearer and can take on a curved, projected shape that resides in spaced relation to a wearer's face.
  • the central plane 40 bisects the nose region 41 of the mask 11 such that symmetry is generally provided on each side of the plane 40 .
  • a line tangent to the upper segment of the perimeter decreases in slope at the onset of the first concave segment 36 relative to a previous tangent line and then begins to increase in slope relative to a previous tangent line moving along the upper segment of the perimeter towards the nose region 41 .
  • the tangent to the perimeter 32 is neutral or parallel to the “y” axis.
  • a line tangent to the upper segment 34 of the perimeter decreases in slope and then increases again relative to a previous tangent line moving along the upper segment 34 towards the end on the right side.
  • the slope of a line tangent to the upper segment of the perimeter may, but not necessarily, include both a negative and positive slope.
  • the slope of the tangent to the perimeter may be slightly negative before becoming positive (moving in the “y” direction).
  • the slope of a line tangent to the upper segment 34 of the perimeter 32 may be negative before becoming slightly positive (moving along the perimeter in the “y” direction).
  • the first inflection point 46 is located where the slope of the line tangent to the perimeter 32 begins to decrease; the second inflection point 48 occurs where the slope of the tangent begins to increase again; the third inflection point 49 is located approximately where the plane 40 bisects the mask body; the fourth inflection 50 occurs where the slope of the tangent begins to increase again; and the fifth inflection 52 occurs where the slope of the tangent begins to decrease again.
  • the mask body 11 can exhibit the sculpted configuration along the upper segment 34 of the perimeter without any imposed conformance from a deformed nose clip.
  • each concave segment 36 (and 38 ) has a chord line Lc that extends between inflection points 46 (and 52 ), respectively, and the central plane 40 .
  • the chord line Lc has a length that is about 3 to 7 centimeters (cm), preferably about 4 to 6 cm, and more preferably about 5 cm.
  • the path length Lp of the perimeter 32 of the first and second segments 36 (and 38 ) is typically about 0.5 to 5 millimeters (mm) greater than the chord length Lc, and typically is about 1 to 3 mm greater than Lc.
  • each concave segment 36 , 38 is about 2 to 11 millimeters, more typically about, 4 to 9 mm, and yet more typically about 5 to 7 mm.
  • the mask body 11 may be folded flat for storage.
  • the top and bottom panels 12 and 16 When placed in a folded condition, the top and bottom panels 12 and 16 may be folded inwardly towards a rear surface 53 of the central panel 14 .
  • the bottom panel 16 is folded inwardly before the top panel 12 .
  • the lower panel 16 may be folded back upon itself as shown in FIG. 7 so that it can be more easily grasped when opening the mask body from its folded condition.
  • Each of the panels may include further folds, seams, pleats, ribs, etc. to assist furnishing the mask with structure and/or distinctive appearance.
  • One or more tabs may be included along the perimeter 32 to assist in opening the mask body 11 from its folded condition to its open ready-to-use condition—see U.S. patent application Ser. No. ______, entitled Maintenance-Free Flat-Fold Respirator That Includes A Graspable Tab filed on the same day as the subject document under attorney case number 62914US002.
  • the mask body may comprise a plurality of layers. These layers may include an inner and outer cover web 54 , a filtration layer 56 , a stiffening layer 58 , and an outer cover web 60 .
  • Maintenance-free respirators of a flat-fold configuration can be manufactured according to the process described in U.S. Pat. Nos. 6,123,077, 6,484,722, 6,536,434, 6,568,392, 6,715,489, 6,722,366, 6,886,563, 7,069,930, and US Patent Publication No. US2006/0180152A1 and EP0814871B1 to Bostock et al.
  • the mask body may include a shaping layer if it is molded into its desired cup-shaped configuration for donning.
  • the layers that comprise the mask body may be joined together at the perimeter using various techniques, including adhesive bonding and ultrasonic welding. Examples of suitable bond patterns are shown in U.S. Pat. D416,323 to Henderson et al. Descriptions of these various layers and how they may be constructed are set forth below.
  • the mask body may optionally include a stiffening layer in one or more of the mask panels.
  • the purpose of the stiffening layer is, as its name implies, to increase the stiffness of the panel(s) or parts of the mask body relative to other panels or parts. Stiffer panels may help support the mask body off of the face of the user.
  • the stiffening layer may be located in any combination of the panels but is preferably located in the central panel of the mask body. Giving support to the center of the mask helps prevent the mask body from collapsing onto the nose and mouth of the user when in use, while leaving the top and bottom panels relatively compliant to aid sealing to the wearer's face.
  • the stiffening layer may be positioned at any point within the layered construction of the panel and typically is juxtaposed against the outer cover web.
  • the stiffening layer can be formed from any number of web based materials. These materials may include open mesh like structures or fibrous webs made of any number of commonly available polymers, including polypropylene, polyethylene, and the like. The stiffening layer also could be derived from a spun bond web based material, again made from either polypropylene or polyethylene. The distinguishing property of the stiffening layer is that its stiffness relative to the other layers within the mask body is greater.
  • Filter layers used in a mask body of the invention can be of a particle capture or gas and vapor type.
  • the filter layer also may be a barrier layer that prevents the transfer of liquid from one side of the filter layer to another to prevent, for instance, liquid aerosols or liquid splashes from penetrating the filter layer.
  • Multiple layers of similar or dissimilar filter types may be used to construct the filtration layer of the invention as the application requires.
  • Filters that may be beneficially employed in a layered mask body of the invention are generally low in pressure drop (for example, less than about 20 to 30 mm H 2 O at a face velocity of 13.8 centimeters per second) to minimize the breathing work of the mask wearer.
  • Filtration layers additionally are flexible and have sufficient shear strength so that they generally retain their structure under the expected use conditions. Generally the shear strength is less than that either the adhesive or shaping layers.
  • particle capture filters include one or more webs of fine inorganic fibers (such as fiberglass) or polymeric synthetic fibers. Synthetic fiber webs may include electret charged polymeric microfibers that are produced from processes such as meltblowing. Polyolefin microfibers formed from polypropylene that has been electret charged to provide particular utility for particulate capture applications.
  • An alternate filter layer may comprise an sorbent component for removing hazardous or odorous gases from the breathing air.
  • Sorbents may include powders or granules that are bound in a filter layer by adhesives, binders, or fibrous structures—see U.S. Pat. No. 3,971,373 to Braun.
  • a sorbent layer can be formed by coating a substrate, such as fibrous or reticulated foam, to form a thin coherent layer.
  • Sorbent materials may include activated carbons that are chemically treated or not, porous alumna-silica catalyst substrates, and alumna particles.
  • the filtration layer is typically chosen to achieve a desired filtering effect and, generally, removes a high percentage of particles and/or or other contaminants from the gaseous stream that passes through it.
  • the fibers selected depend upon the kind of substance to be filtered and, typically, are chosen so that they do not become bonded together during the molding operation.
  • the filtration layer may come in a variety of shapes and forms.
  • the filtration layer also may include multiple layers of filter media joined together by an adhesive component. Essentially any suitable material that is known for forming a filtering layer of a direct-molded respiratory mask may be used for the filtering material.
  • melt-blown fibers such as taught in Wente, Van A., Superfine Thermoplastic Fibers, 48 Indus. Engn. Chem., 1342 et seq. (1956), especially when in a persistent electrically charged (electret) form are especially useful (see, for example, U.S. Pat. No. 4,215,682 to Kubik et al.).
  • These melt-blown fibers may be microfibers that have an effective fiber diameter less than about 20 micrometers ( ⁇ m) (referred to as BMF for “blown microfiber”), typically about 1 to 12 ⁇ m. Effective fiber diameter may be determined according to Davies, C.
  • BMF webs that contain fibers formed from polypropylene, poly(4-methyl-1-pentene), and combinations thereof.
  • Electrically charged fibrillated-film fibers as taught in van Turnhout, U.S. Pat. Re. 31,285, may also be suitable, as well as rosin-wool fibrous webs and webs of glass fibers or solution-blown, or electrostatically sprayed fibers, especially in microfilm form. Electric charge can be imparted to the fibers by contacting the fibers with water as disclosed in U.S. Pat. No. 6,824,718 to Eitzman et al., U.S. Pat. No.
  • additives can be included in the fibers to enhance the filtration performance of webs produced through the hydro-charging process (see U.S. Pat. No. 5,908,598 to Rousseau et al.).
  • Fluorine atoms in particular, can be disposed at the surface of the fibers in the filter layer to improve filtration performance in an oily mist environment—see U.S. Pat. Nos. 6,398,847 B1, 6,397,458 B1, and 6,409,806 B1 to Jones et al.
  • Typical basis weights for electret BMF filtration layers are about 15 to 100 grams per square meter.
  • the basis weight When electrically charged according to techniques described in, for example, the '507 patent, and when including fluorine atoms as mentioned in the Jones et al. patents, the basis weight may be about 20 to 40 g/m 2 and about 10 to 30 g/m 2 , respectively.
  • an inner cover web could be used to provide a smooth surface for contacting the wearer's face, and an outer cover web could be used to entrap loose fibers in the mask body or for aesthetic reasons.
  • a cover web typically does not provide any significant shape retention to the mask body.
  • an inner cover web preferably has a comparatively low basis weight and is formed from comparatively fine fibers. More particularly, the cover web may be fashioned to have a basis weight of about 5 to 50 g/m 2 (typically 10 to 30 g/m 2 ), and the fibers are less than 3.5 denier (typically less than 2 denier, and more typically less than 1 denier). Fibers used in the cover web often have an average fiber diameter of about 5 to 24 micrometers, typically of about 7 to 18 micrometers, and more typically of about 8 to 12 micrometers.
  • the cover web material may be suitable for use in the molding procedure by which the mask body is formed, and to that end, advantageously, has a degree of elasticity (typically, but not necessarily, 100 to 200% at break) or is plastically deformable.
  • Suitable materials for the cover web are blown microfiber (BMF) materials, particularly polyolefin BMF materials, for example polypropylene BMF materials (including polypropylene blends and also blends of polypropylene and polyethylene).
  • BMF blown microfiber
  • polyolefin BMF materials for example polypropylene BMF materials (including polypropylene blends and also blends of polypropylene and polyethylene).
  • a suitable process for producing BMF materials for a cover web is described in U.S. Pat. No. 4,013,816 to Sabee et al.
  • the web may be formed by collecting the fibers on a smooth surface, typically a smooth-surfaced drum.
  • a typical cover web may be made from polypropylene or a polypropylene/polyolefin blend that contains 50 weight percent or more polypropylene. These materials have been found to offer high degrees of softness and comfort to the wearer and also, when the filter material is a polypropylene BMF material, to remain secured to the filter material after the molding operation without requiring an adhesive between the layers.
  • Typical materials for the cover web are polyolefin BMF materials that have a basis weight of about 15 to 35 grams per square meter (g/m 2 ) and a fiber denier of about 0.1 to 3.5, and are made by a process similar to that described in the '816 patent.
  • Polyolefin materials that are suitable for use in a cover web may include, for example, a single polypropylene, blends of two polypropylenes, and blends of polypropylene and polyethylene, blends of polypropylene and poly(4-methyl-1-pentene), and/or blends of polypropylene and polybutylene.
  • a fiber for the cover web is a polypropylene BMF made from the polypropylene resin “Escorene 3505G” from Exxon Corporation and having a basis weight of about 25 g/m 2 and a fiber denier in the range 0.2 to 3.1 (with an average, measured over 100 fibers of about 0.8).
  • Another suitable fiber is a polypropylene/polyethylene BMF (produced from a mixture comprising 85 percent of the resin “Escorene 3505G” and 15 percent of the ethylene/alpha-olefin copolymer “Exact 4023” also from Exxon Corporation) having a basis weight 25 g/m 2 and an average fiber denier of about 0.8.
  • Other suitable materials may include spunbond materials available, under the trade designations “Corosoft Plus 20”, “Corosoft Classic 20 ” and “Corovin PP-S-14”, from Corovin GmbH of Peine, Germany, and a carded polypropylene/viscose material available, under the trade designation “370/15”, from J.W. Suominen OY of Nakila, Finland.
  • Cover webs that are used in the invention preferably have very few fibers protruding from the surface of the web after processing and therefore have a smooth outer surface. Examples of cover webs that may be used in the present invention are disclosed, for example, in U.S. Pat. No. 6,041,782 to Angadjivand, U.S. Pat. No. 6,123,077 to Bostock et al., and WO 96/28216A to Bostock et al.
  • the mask body may contain a shaping layer that supports a filtration layer on its inner or outer sides.
  • a second shaping layer that has the same general shape as the first shaping layer also could be used on each side of the filtration layer.
  • the shaping layer's function is primarily to maintain the shape of the mask body and to support the filtration layer.
  • an outer shaping layer also may function as a coarse initial filter for air that is drawn into the mask, the predominant filtering action of the respirator is provided by the filter media.
  • the shaping layers may be formed from at least one layer of fibrous material that can be molded to the desired shape with the use of heat and that retains its shape when cooled. Shape retention is typically achieved by causing the fibers to bond to each other at points of contact between them, for example, by fusion or welding. Any suitable material known for making a shape-retaining layer of a direct-molded respiratory mask may be used to form the mask shell, including a mixture of synthetic staple fiber, preferably crimped, and bicomponent staple fiber.
  • Bicomponent fiber is a fiber that includes two or more distinct regions of fibrous material, typically distinct regions of polymeric materials. Typical bicomponent fibers include a binder component and a structural component.
  • the binder component allows the fibers of the shape-retaining shell to be bonded together at fiber intersection points when heated and cooled. During heating, the binder component flows into contact with adjacent fibers.
  • the shape-retaining layer can be prepared from fiber mixtures that include staple fiber and bicomponent fiber in a weight-percent ratios that may range, for example, from 0/100 to about 75/25.
  • the material includes at least 50 weight-percent bicomponent fiber to create a greater number of intersection bonding points, which, in turn, increase the resilience and shape retention of the shell.
  • Suitable bicomponent fibers that may be used in the shaping layer include, for example, side-by-side configurations, concentric sheath-core configurations, and elliptical sheath-core configurations.
  • One suitable bicomponent fiber is the polyester bicomponent fiber available, under the trade designation “KOSA T254” (12 denier, length 38 mm), from Kosa of Charlotte, N.C., U.S.A., which may be used in combination with a polyester staple fiber, for example, that available from Kosa under the trade designation “T259” (3 denier, length 38 mm) and possibly also a polyethylene terephthalate (PET) fiber, for example, that available from Kosa under the trade designation “T295” (15 denier, length 32 mm).
  • PET polyethylene terephthalate
  • the bicomponent fiber also may comprise a generally concentric sheath-core configuration having a core of crystalline PET surrounded by a sheath of a polymer formed from isophthalate and terephthalate ester monomers.
  • the latter polymer is heat softenable at a temperature lower than the core material.
  • Polyester has advantages in that it can contribute to mask resiliency and can absorb less moisture than other fibers.
  • the shaping layer also can be prepared without bicomponent fibers.
  • fibers of a heat-flowable polyester can be included together with staple, preferably crimped, fibers in a shaping layer so that, upon heating of the web material, the binder fibers can melt and flow to a fiber intersection point where it forms a mass, that upon cooling of the binder material, creates a bond at the intersection point.
  • a mesh or net of polymeric strands also could be used in lieu of thermally bondable fibers. An example of this type of a structure is described in U.S. Pat. No. 4,850,347 to Skov.
  • the web When a fibrous web is used as the material for the shape-retaining shell, the web can be conveniently prepared on a “Rando Webber” air-laying machine (available from Rando Machine Corporation, Cincinnati, N.Y.) or a carding machine.
  • the web can be formed from bicomponent fibers or other fibers in conventional staple lengths suitable for such equipment.
  • the layer preferably has a basis weight of at least about 100 g/m 2 , although lower basis weights are possible. Higher basis weights, for example, approximately 150 or more than 200 g/m 2 , may provide greater resistance to deformation.
  • the shaping layer typically has a maximum density of about 0.2 g/cm 2 over the central area of the mask.
  • the shaping layer has a thickness of about 0.3 to 2.0 mm, more typically about 0.4 to 0.8 mm.
  • Examples of molded maintenance-free respirators that use shaping layers are described in U.S. Pat. No. 7,131,442 to Kronzer et al., U.S. Pat. No. 6,293,182 to Angadjivand et al., U.S. Pat. No. 4,850,347 to Skov; U.S. Pat. No. 4,807,619 to Dyrud et al., and U.S. Pat. No. 4,536,440 to Berg.
  • Molded maintenance-free respirators also may be made without using a separate shaping layer to support the filtration layer.
  • the filtration layer also acts as the shaping layer—see U.S. Pat. No. 6,827,764 to Springett et al. and U.S. Pat. No. 6,057,256 to Krueger et al.
  • the respirator also may include an optional exhalation valve that allows for the easy exhalation of air by the user.
  • Exhalation valves that exhibit an extraordinary low pressure drop during an exhalation are described in U.S. Pat. Nos. 7,188,622, 7,028,689, and 7,013,895 to Martin et al.; U.S. Pat. Nos. 7,117,868, 6,854,463, 6,843,248, and 5,325,892 to Japuntich et al.; and U.S. Pat. No. 6,883,518 to Mittelstadt et al.
  • the exhalation valve may be secured to the central panel, preferably near the middle of the central panel, by a variety of means including sonic welds, adhesion bonding, mechanical clamping, and the like—see, for example, U.S. Pat. Nos. 7,069,931, 7,007,695, 6,959,709, and 6,604,524 to Curran et al. and EP1,030,721 to Williams et al.
  • This respirator has a configuration similar to the respirator shown in U.S. Pat. D449,377 to Henderson et al., Des. 424,688 to Bryant et al., and Des. 416,323 Henderson et al.
  • the inventive maintenance-free respirator had the following construction:
  • Two electrically-charged, melt blown polypropylene microfiber filter layers having a basis weight of 100 g/m, an effective fiber diameter of 7 to 8 microns, and a thickness of about 1 mm;
  • Lengths of these panel constructions are laid up in to 5 meter (m) strips and die-cut using an hydraulic swing press into the correct shapes (approx 350 mm by 300 mm) for each of the three panels.
  • the top, bottom, and the central panel blanks are each individually cut.
  • the bottom panel was placed into an ultrasonic welding machine such that the cut profiled edge of the panel is positioned over the weld anvil.
  • the welding machine was cycled with the weld time set at 500 milliseconds (ms), and the bottom panel weld was completed.
  • the upper panel was processed in the same way using an ultrasonic weld press set at the same setting but with a weld anvil to match the upper cut edge profile. Further finishing operation were then performed to fit a strip of 25 mm wide open cell polyurethane nose foam to the outer surface of the inner web adjacent to the welded profiled edge. This was then cut to match the profile of the upper panel edge. A strip of 5 mm ⁇ 0.7 mm ⁇ 140 mm malleable aluminum was fixed to the inner surface of the outer cover web using a hot-melt adhesive.
  • the center panel blank was positioned onto an ultrasonic welder press, and the valve hole was cut. An exhalation valve was then inserted in the welder and the welder, set to 600 ms weld time, was cycled again to weld the valve at the opening.
  • the welding cycle was then initiated for welding the lower panel to the center panel by positioning the anvil under the welding horn. This was repeated for the upper panel.
  • the dimensions of Lc, Lp, and d shown in FIG. 5 b had the dimensions of 49 mm, 50 mm, and 6 mm, respectively.
  • the mask body was complete and the harness headbands were attached. Two polyisoprene bands about 21 cm long were cut to match the mask body length in the crosswise dimension. Utilizing a manual staple gun, and orientating the mask body so that the staple legs, when penetrating the mask body, will fold over on the outer surface, the headband was stapled at either extremity of the product. This operation was conducted twice, offering an upper and lower headband, on the back of the product.
  • the inventive respirator was donned by a number of individuals at the 3M Company and was found to make a snug fit to the wearer's face.
  • the inventive respirator also was subjected to the Eyewear Compatibility Study for 19 different types of eyewear.
  • the test results are set forth below in Table 1:
  • test results show that there was no overlap between the eyewear and the respirator mask body in half of the tested eyewear. The remaining half of the eyewear exhibited reduced overlap. Thus, the compatibility between the two items of PPE was enhanced when compared to an unmodified respirator, which exhibited substantial overlap between the PPE across all 19 sets of eyewear.

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US11/743,734 2007-05-03 2007-05-03 Maintenance-free respirator that has concave portions on opposing sides of mask top section Abandoned US20080271739A1 (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
US11/743,734 US20080271739A1 (en) 2007-05-03 2007-05-03 Maintenance-free respirator that has concave portions on opposing sides of mask top section
JP2010506355A JP2010525875A (ja) 2007-05-03 2008-03-10 マスク上部の両側に凹部を有するメンテナンスフリーレスピレータ
PL08731790T PL2175751T3 (pl) 2007-05-03 2008-03-10 Bezobsługowa półmaska oddechowa, która ma wklęsłe części na przeciwległych stronach górnej części maski
CN2008800139712A CN101668445B (zh) 2007-05-03 2008-03-10 在面罩顶部段反向侧上具有凹型部分的免维护呼吸器
EP08731790A EP2175751B1 (en) 2007-05-03 2008-03-10 Maintenance-free respirator that has concave portions on opposing sides of mask top section
AT08731790T ATE531284T1 (de) 2007-05-03 2008-03-10 Wartungsfreie atemschutzmaske mit konkaven abschnitten an gegenüberliegenden seiten des oberen teils der maske
KR1020097024078A KR101716495B1 (ko) 2007-05-03 2008-03-10 마스크 상단 섹션의 대향 측면 상에 오목부를 갖는 유지보수 불필요 호흡기
KR1020167024502A KR20160108604A (ko) 2007-05-03 2008-03-10 마스크 상단 섹션의 대향 측면 상에 오목부를 갖는 유지보수 불필요 호흡기
EP11183704A EP2428127A3 (en) 2007-05-03 2008-03-10 Maintenance-free respirator that has concave portions on opposing sides of mask top section
BRPI0809786-0A BRPI0809786B1 (pt) 2007-05-03 2008-03-10 "respirador isento de manutenção"
PCT/US2008/056370 WO2008137205A1 (en) 2007-05-03 2008-03-10 Maintenance-free respirator that has concave portions on opposing sides of mask top section
US15/726,723 US10827787B2 (en) 2007-05-03 2017-10-06 Maintenance-free respirator that has concave portions on opposing sides of mask top section
US16/948,919 US11877604B2 (en) 2007-05-03 2020-10-06 Maintenance-free respirator that has concave portions on opposing sides of mask top section
US18/357,392 US20230363475A1 (en) 2007-05-03 2023-07-24 Maintenance-free respirator that has concave portions on opposing sides of mask top section

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US15/726,723 Active 2028-02-06 US10827787B2 (en) 2007-05-03 2017-10-06 Maintenance-free respirator that has concave portions on opposing sides of mask top section
US16/948,919 Active 2028-02-26 US11877604B2 (en) 2007-05-03 2020-10-06 Maintenance-free respirator that has concave portions on opposing sides of mask top section
US18/357,392 Pending US20230363475A1 (en) 2007-05-03 2023-07-24 Maintenance-free respirator that has concave portions on opposing sides of mask top section

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US16/948,919 Active 2028-02-26 US11877604B2 (en) 2007-05-03 2020-10-06 Maintenance-free respirator that has concave portions on opposing sides of mask top section
US18/357,392 Pending US20230363475A1 (en) 2007-05-03 2023-07-24 Maintenance-free respirator that has concave portions on opposing sides of mask top section

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US (4) US20080271739A1 (pt)
EP (2) EP2428127A3 (pt)
JP (1) JP2010525875A (pt)
KR (2) KR101716495B1 (pt)
CN (1) CN101668445B (pt)
AT (1) ATE531284T1 (pt)
BR (1) BRPI0809786B1 (pt)
PL (1) PL2175751T3 (pt)
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Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090120432A1 (en) * 2007-11-09 2009-05-14 Macdonald John Gavin Moisture indicator for heat and moisture exchange devices
US20100042139A1 (en) * 2006-10-02 2010-02-18 Norina Honegger Device for reshaping bones
CN102018300A (zh) * 2009-09-18 2011-04-20 3M创新有限公司 具有对称标记的水平平折过滤式面罩呼吸器
WO2011062843A2 (en) * 2009-11-18 2011-05-26 3M Innovative Properties Company Reinforced filter media
US20110155137A1 (en) * 2009-12-30 2011-06-30 3M Innovative Properties Company Filtering face-piece respirator having an auxetic mesh in the mask body
US20110203593A1 (en) * 2008-05-15 2011-08-25 Uni-Charm Corporation Mask
WO2011163002A3 (en) * 2010-06-25 2012-05-24 3M Innovative Properties Company Respirator that has inward nose region fold with high level conformation
US20120160247A1 (en) * 2010-12-22 2012-06-28 Quincy Iii Roger B Splash Resistant Facemask
EP2589413A3 (en) * 2011-11-03 2014-01-01 San Huei United Co., Ltd. Foldable respirator
WO2017066284A1 (en) 2015-10-12 2017-04-20 3M Innovative Properties Company Filtering face-piece respirator including functional material and method of forming same
WO2017070455A1 (en) * 2015-10-22 2017-04-27 Scott Technologies, Inc. Respirator mask with eyewear interface
WO2017083289A1 (en) 2015-11-11 2017-05-18 3M Innovative Properties Company Shape retaining flat-fold respirator
US20170360125A1 (en) * 2016-06-20 2017-12-21 Ronald Tuan Gauze mask with folding lines capable of enabling the gauze mask to be folded into a flat package or unfolded into a three dimensional configuration
US10040621B2 (en) 2014-03-20 2018-08-07 3M Innovative Properties Company Filtering face-piece respirator dispenser
US10307556B2 (en) 2013-06-13 2019-06-04 Koninklijke Philips N.V. Patient interface devices with adhesive attachnment
US20190290943A1 (en) * 2018-03-21 2019-09-26 Dräger Safety AG & Co. KGaA Breathing half mask
US10463825B2 (en) 2004-04-02 2019-11-05 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US10518054B2 (en) 2014-08-25 2019-12-31 Fisher & Paykel Healthcare Limited Respiratory mask and related portions, components or sub-assemblies
CN110787384A (zh) * 2019-08-09 2020-02-14 3M创新有限公司 面罩本体及面罩
US10603456B2 (en) 2011-04-15 2020-03-31 Fisher & Paykel Healthcare Limited Interface comprising a nasal sealing portion
US10653854B2 (en) 2011-07-01 2020-05-19 Fisher & Paykel Healthcare Limited Nasal mask interface assembly
WO2020053786A3 (en) * 2018-09-14 2020-06-04 3M Innovative Properties Company Respirator including adjustable strap and method of forming same
US10792451B2 (en) 2008-05-12 2020-10-06 Fisher & Paykel Healthcare Limited Patient interface and aspects thereof
USD899585S1 (en) * 2017-10-12 2020-10-20 Jsp Limited Respiratory mask
US10828442B2 (en) 2011-04-15 2020-11-10 Fisher & Paykel Healthcare Limited Interface comprising a rolling nasal bridge portion
US10827787B2 (en) 2007-05-03 2020-11-10 3M Innovative Properties Company Maintenance-free respirator that has concave portions on opposing sides of mask top section
US10835702B2 (en) 2010-10-08 2020-11-17 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US10842964B2 (en) 2004-02-23 2020-11-24 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US20200390167A1 (en) * 2018-01-03 2020-12-17 3M Innovative Properties Company Respirator Including Transversely-Extending Pleat And Method Of Forming Same
US10888130B1 (en) * 2020-07-17 2021-01-12 Pegasos One, LLC Face shield for personal protection
CN112205689A (zh) * 2015-05-12 2021-01-12 3M创新有限公司 呼吸器突片
US10946155B2 (en) 2012-09-04 2021-03-16 Fisher & Paykel Healthcare Limited Valsalva mask
USD917040S1 (en) 2011-09-16 2021-04-20 Fisher & Paykel Healthcare Limited Headstrap of a headgear assembly
USD926988S1 (en) * 2018-06-29 2021-08-03 3M Innovative Properties Company Chin tab
US11179535B2 (en) 2008-10-10 2021-11-23 Fisher & Paykel Healthcare Limited Nasal pillows for a patient interface
US20210392966A1 (en) * 2020-06-17 2021-12-23 Shock Doctor, Inc. Face coverings for use with mouthguards and garments including such face coverings
US11206880B1 (en) * 2020-07-17 2021-12-28 Pegasos One, LLC Face shield for personal protection
US11260194B2 (en) 2006-07-14 2022-03-01 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US20220062674A1 (en) * 2018-12-21 2022-03-03 Dräger Safety AG & Co. KGaA Breathing half mask and process for manufacturing a breathing half mask
EP4011478A1 (de) * 2020-12-08 2022-06-15 Sandler AG Vliesstoffmaterial zur herstellung einer atemschutzmaske sowie atemschutzmaske
WO2022185142A1 (de) 2021-03-01 2022-09-09 Flawa Consumer Gmbh Atemschutzmaske
US11541197B2 (en) 2008-07-18 2023-01-03 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
USD983356S1 (en) 2020-06-17 2023-04-11 Shock Doctor, Inc. Face covering
USD998785S1 (en) * 2020-02-18 2023-09-12 Cranberry International Sdn Bhd Respiratory mask
US11806452B2 (en) 2012-08-08 2023-11-07 Fisher & Paykel Healthcare Limited Headgear for patient interface
US11813581B2 (en) 2017-07-14 2023-11-14 3M Innovative Properties Company Method and adapter for conveying plural liquid streams
USD1010102S1 (en) * 2019-05-23 2024-01-02 Milwaukee Electric Tool Corporation Respirator mask
US11904191B2 (en) 2007-05-03 2024-02-20 3M Innovative Properties Company Anti-fog respirator
EP4349419A1 (en) * 2022-10-07 2024-04-10 3M Innovative Properties Company Disposable, flat-fold respirator having increased stiffness in selected areas
US12005277B2 (en) 2013-07-15 2024-06-11 3M Innovative Properties Company Respirator having optically active exhalation valve

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10792194B2 (en) 2014-08-26 2020-10-06 Curt G. Joa, Inc. Apparatus and methods for securing elastic to a carrier web
US20180021608A1 (en) * 2015-02-09 2018-01-25 3M Innovative Properties Company Filtering Face-Piece Respirator And Method Of Forming Same
CN109310166A (zh) * 2016-06-30 2019-02-05 株式会社科莱尔 口罩、呼吸负荷型口罩以及口罩盒
USD821568S1 (en) * 2016-07-20 2018-06-26 Blueair Ab Face mask
KR200496135Y1 (ko) 2017-01-31 2022-11-11 (주)포티스 포장자동화시스템을 위한 포장상자
KR101913045B1 (ko) * 2017-09-12 2018-10-29 김회철 다양한 패턴의 인쇄수단이 구비되는 황사마스크.
JP2021511165A (ja) 2018-01-29 2021-05-06 カート ジー．ジョア、インコーポレイテッド 吸収性衛生製品用の弾性複合材構造体を製造する装置および方法
US11925538B2 (en) 2019-01-07 2024-03-12 Curt G. Joa, Inc. Apparatus and method of manufacturing an elastic composite structure for an absorbent sanitary product
US11173072B2 (en) 2019-09-05 2021-11-16 Curt G. Joa, Inc. Curved elastic with entrapment
KR200493537Y1 (ko) * 2019-11-26 2021-04-15 김회철 자외선 반응 황사마스크
US11766079B2 (en) 2020-03-30 2023-09-26 Under Armour, Inc. Face mask and method of making the same
USD949328S1 (en) * 2020-04-03 2022-04-19 Paul Boye Technologies Protective mask
US11284654B2 (en) 2020-06-10 2022-03-29 Under Armour, Inc. Breathable face mask
US11019859B1 (en) * 2020-08-16 2021-06-01 Acoustic Mask LLC Acoustic face mask apparatus
USD995757S1 (en) * 2020-11-18 2023-08-15 Skypro Medical Supplies Company Limited Foldable face mask
USD984635S1 (en) * 2020-11-18 2023-04-25 Skypro Medical Supplies Company Limited Face mask
US20230034491A1 (en) * 2021-07-29 2023-02-02 Lighthouse Worldwide Solutions, Inc. Fitted face mask apparatus
WO2023031697A1 (en) 2021-09-01 2023-03-09 3M Innovative Properties Company Anti-virus respirator and mask
DE102022127547A1 (de) 2022-10-19 2024-04-25 MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. Mund-/Nasenabdeckung mit einem plastisch verformbaren Nasenbügel

Citations (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US715052A (en) * 1902-06-19 1902-12-02 Robert Lee Harper Mouth and nose guard.
US3971369A (en) * 1975-06-23 1976-07-27 Johnson & Johnson Folded cup-like surgical face mask and method of forming the same
US4319567A (en) * 1980-07-07 1982-03-16 Moldex/Metric Products, Inc. Disposable face mask
US4641645A (en) * 1985-07-15 1987-02-10 New England Thermoplastics, Inc. Face mask
US4850347A (en) * 1980-06-09 1989-07-25 Metric Products, Inc. Face mask
US5025506A (en) * 1989-09-28 1991-06-25 Huang James R C One piece mask body having vertically stitched nose accomodating portion
US5419318A (en) * 1991-05-21 1995-05-30 Better Breathing, Inc. Breathing mask
US5558089A (en) * 1994-10-13 1996-09-24 Minnesota Mining And Manufacturing Company Respirator nose clip
US5628308A (en) * 1994-01-19 1997-05-13 Harges, Jr.; Cordell F. Heat and fire resistant respiratory filtration mask
US5704063A (en) * 1995-11-16 1998-01-06 Tilden; Mark Face covering
US5717991A (en) * 1995-11-30 1998-02-17 Ni-Charm Corporation Disposable sanitary mask
US5884336A (en) * 1997-06-20 1999-03-23 Stout; Kathleen K. Cold weather mask including a mouth seal having a direct flow through porous hygroscopic material
US6102040A (en) * 1996-03-26 2000-08-15 Tayebi; Amad Breathing mask
US6123077A (en) * 1995-03-09 2000-09-26 3M Innovative Properties Company Flat-folded personal respiratory protection devices and processes for preparing same
US6173712B1 (en) * 1998-04-29 2001-01-16 Kimberly-Clark Worldwide, Inc. Disposable aerosol mask with disparate portions
US6257235B1 (en) * 1999-05-28 2001-07-10 Kimberly-Clark Worldwide, Inc. Face mask with fan attachment
USD449377S1 (en) * 2000-05-09 2001-10-16 3M Innovative Properties Company Tabs on a personal respiratory protection device
US20020056450A1 (en) * 2000-11-10 2002-05-16 Lee Kun Woo Anti-fogging mask
US6394090B1 (en) * 1999-02-17 2002-05-28 3M Innovative Properties Company Flat-folded personal respiratory protection devices and processes for preparing same
USD459471S1 (en) * 1996-11-25 2002-06-25 3M Innovative Properties Company Personal respiratory protection device that has a three panelled look
US6460539B1 (en) * 2000-09-21 2002-10-08 3M Innovative Properties Company Respirator that includes an integral filter element, an exhalation valve, and impactor element
US20030015201A1 (en) * 1995-09-11 2003-01-23 Bostock Graham J. Processes for preparing flat-folded personal respiratory protection devices
US20040011362A1 (en) * 2002-07-18 2004-01-22 3M Innovative Properties Company Crush resistant filtering face mask
US6823868B1 (en) * 2002-10-17 2004-11-30 Paul G. Begum Travel mask
US6827764B2 (en) * 2002-07-25 2004-12-07 3M Innovative Properties Company Molded filter element that contains thermally bonded staple fibers and electrically-charged microfibers
US20050016544A1 (en) * 2002-10-24 2005-01-27 Thornton W. Keith Custom fitted mask and method of forming same
US6886563B2 (en) * 1995-03-09 2005-05-03 3M Innovative Properties Company Flat-folded personal respiratory protection devices and processes for preparing same
US20060174890A1 (en) * 2005-02-04 2006-08-10 Center Healthcare Technology Co., Ltd. Nasal adjuster
US7131442B1 (en) * 1990-12-20 2006-11-07 Minnesota Mining And Manufacturing Company Fibrous filtration face mask
US20070084469A1 (en) * 2005-10-11 2007-04-19 Mcdonald Thomas K Breathing mask and regulator for aircraft
USD575390S1 (en) * 2005-06-30 2008-08-19 3M Innovative Properties Company Exhalation valve filter
USD613850S1 (en) * 2007-07-31 2010-04-13 3M Innovative Properties Company Respirator mask body

Family Cites Families (391)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE24549E (en) 1958-10-14 Haliczer
US1440358A (en) 1922-05-29 1922-12-26 Irene B Whetstone Protective covering material for buildings
US1628090A (en) 1924-09-26 1927-05-10 Weiss Johannes Sound-insulating plate, sheet, or slab
US1867478A (en) 1927-08-12 1932-07-12 Firm Dragerwerk Heinr & Bernh Nonreturn valve for breathing appliances
SU11567A1 (ru) 1928-05-21 1929-09-30 Дрегерверк Генр. и Бернг Дрегер Обратный клапан дл респираторов
US1987922A (en) 1931-12-14 1935-01-15 Maurice L Blatt Face mask
GB388638A (en) 1932-06-21 1933-03-02 Joseph Edouard Leduc Respiratory mask
US2012505A (en) 1934-02-05 1935-08-27 Samuel J Goldsmith Mask
US2072516A (en) 1934-02-08 1937-03-02 American Mach & Foundry Insert attachment for wrapping machines
US2029947A (en) 1935-07-31 1936-02-04 Ruth M Schmitt Facial mask and method of making the same
GB504232A (en) 1937-07-17 1939-04-21 Int Latex Processes Ltd Improvements in or relating to rubber gas masks
US2265529A (en) 1939-05-29 1941-12-09 Kemp Grace Surgical mask
US2230770A (en) 1939-12-09 1941-02-04 Cons Car Heating Co Inc Circuit controller
US2290885A (en) 1940-04-05 1942-07-28 American Optical Corp Respirator and method of making the same
US2281744A (en) 1940-07-11 1942-05-05 Newton L Brunner Face mask
US2378929A (en) 1942-06-29 1945-06-26 American Optical Corp Respirator
US2507447A (en) 1946-11-27 1950-05-09 Joie Lorraine H La Disposable dressing mask
US2565124A (en) 1948-09-22 1951-08-21 Henry J Durborow Medical face mask
US2634725A (en) 1951-03-20 1953-04-14 Us Rubber Co Stretchable face mask
US2752916A (en) 1953-10-28 1956-07-03 Haliczer Marcus Accordion-folded face mask
US2895472A (en) 1956-01-05 1959-07-21 Electric Storage Battery Co Respirator
US3038470A (en) 1959-05-15 1962-06-12 Cayton Chemical Corp Facial mask
US3014479A (en) 1959-05-20 1961-12-26 Welsh Mfg Co Respirator
US3059637A (en) 1961-01-24 1962-10-23 Voit Rubber Corp Non-return valve for swim mask or face plate
US3220409A (en) 1961-03-28 1965-11-30 Johnson & Johnson Face mask
US3082767A (en) 1961-05-05 1963-03-26 Welsh Mfg Co Head straps for respirator
US3308816A (en) 1964-08-07 1967-03-14 Dynamic Products Company Quick donning frame for respirator masks and the like
US3288138A (en) 1965-10-14 1966-11-29 Sachs Louis Surgical mask
US3557265A (en) 1967-12-29 1971-01-19 Dow Chemical Co Method of extruding laminates
US3652895A (en) 1969-05-23 1972-03-28 Tokyo Shibaura Electric Co Shadow-mask having graduated rectangular apertures
US3603315A (en) 1969-10-17 1971-09-07 American Hospital Supply Corp Surgical face mask
CA948388A (en) 1970-02-27 1974-06-04 Paul B. Hansen Pattern bonded continuous filament web
US3736928A (en) 1971-03-15 1973-06-05 Nils O W Rundblad Collapsible face mask
US3752157A (en) 1971-11-08 1973-08-14 O Malmin Disposable headband and filter
US3768100A (en) 1972-05-23 1973-10-30 Us Army Cold weather face mask
US3834384A (en) 1973-05-01 1974-09-10 H Raines Surgical mask with adhesive vapor barrier
US3994319A (en) 1973-05-24 1976-11-30 Skyline Industries, Inc. Reed type valve formed of high modulus fiber reinforced composite material
US3890966A (en) 1973-11-01 1975-06-24 Johnson & Johnson Anti-fog surgical face mask with slits
US3888246A (en) 1973-11-01 1975-06-10 Johnson & Johnson Anti-fog surgical face mask
US3971373A (en) 1974-01-21 1976-07-27 Minnesota Mining And Manufacturing Company Particle-loaded microfiber sheet product and respirators made therefrom
US4100324A (en) 1974-03-26 1978-07-11 Kimberly-Clark Corporation Nonwoven fabric and method of producing same
US3974829A (en) 1974-07-08 1976-08-17 Giles C. Clegg, Jr. Means for preventing fogging of optical aids used by the wearer of a surgical mask
US3985132A (en) 1974-12-13 1976-10-12 Tape-Licator, Inc. Filter mask
USD249279S (en) 1975-09-01 1978-09-05 Sigurd Alfons Backlund Exhaust valve of respiratory mask
US4077404A (en) 1975-09-17 1978-03-07 H. B. W. Medical Instruments Manufacturing Company, Inc. Breathing equipment such as resuscitators
US4013816A (en) 1975-11-20 1977-03-22 Draper Products, Inc. Stretchable spun-bonded polyolefin web
US4037593A (en) 1975-11-28 1977-07-26 Giles C. Clegg, Jr. Surgical mask with vapor barrier
US3983900A (en) 1975-12-09 1976-10-05 Airhart Tom P Reed valves formed of high modulus fiber reinforced resin
SE7601232L (sv) 1976-02-05 1977-08-06 Reboprodukter Goran Segersten Ansiktsmask med utbytbart filter
CA1073648A (en) 1976-08-02 1980-03-18 Edward R. Hauser Web of blended microfibers and crimped bulking fibers
NL181632C (nl) 1976-12-23 1987-10-01 Minnesota Mining & Mfg Electreetfilter en werkwijze voor het vervaardigen daarvan.
US4215682A (en) 1978-02-06 1980-08-05 Minnesota Mining And Manufacturing Company Melt-blown fibrous electrets
DE2852016A1 (de) 1978-12-01 1980-06-04 Draegerwerk Ag Membran fuer atemgesteuertes dosierventil
US4248220A (en) 1979-09-10 1981-02-03 American Cyanamid Company Disposable dust respirator
US4300240A (en) 1979-09-13 1981-11-17 Edwards Joseph H Cold weather face mask
US4300549A (en) 1980-01-07 1981-11-17 Surgikos Operating room face mask
GB2072516A (en) 1980-03-31 1981-10-07 Siebe Gorman & Co Ltd Improvements in and relating to respiratory face masks
US4419994A (en) 1980-07-03 1983-12-13 Racal Safety Limited Respirators
US4417575A (en) 1980-07-03 1983-11-29 Racal Safety Limited Respirators
USD270110S (en) 1981-02-23 1983-08-16 Adrienne Moore Face mask
US4375718A (en) 1981-03-12 1983-03-08 Surgikos, Inc. Method of making fibrous electrets
CA1185500A (en) 1981-08-12 1985-04-16 Joseph Z. Zdrok Disposable respirator
US4454881A (en) 1981-08-21 1984-06-19 Moldex/Metric Products, Inc. Multi-layer face mask with molded edge bead
US4419993A (en) 1981-12-10 1983-12-13 Minnesota Mining & Manufacturing Company Anti-fogging surgical mask
US4429001A (en) 1982-03-04 1984-01-31 Minnesota Mining And Manufacturing Company Sheet product containing sorbent particulate material
US4867148A (en) 1982-08-20 1989-09-19 Gomez Gustavo J Nonfiltering facial separation barrier
WO1984003193A1 (en) 1983-02-04 1984-08-16 Minnesota Mining & Mfg Method and apparatus for manufacturing an electret filter medium
US4520509A (en) 1983-02-18 1985-06-04 Ward Russell G Mask with removable countercurrent exchange module
US4643182A (en) 1983-04-20 1987-02-17 Max Klein Disposable protective mask
US4729371A (en) 1983-10-11 1988-03-08 Minnesota Mining And Manufacturing Company Respirator comprised of blown bicomponent fibers
US4941470A (en) 1983-11-07 1990-07-17 Tecnol, Inc. Face mask with ear loops and method for forming
US4628927A (en) 1983-11-22 1986-12-16 Ward Russell G Reversible face mask with replaceable air filter insert
JPS60116352A (ja) 1983-11-28 1985-06-22 山内　治和 ベツド装置
JPS60161091A (ja) 1984-01-30 1985-08-22 川崎重工業株式会社 産業用ロボツトのフロ−テイングリスト
JPS60168511A (ja) 1984-02-10 1985-09-02 Japan Vilene Co Ltd エレクトレツトフイルタの製造方法
USD287649S (en) 1984-02-17 1987-01-06 American Optical Corporation Disposable respirator
US4536440A (en) 1984-03-27 1985-08-20 Minnesota Mining And Manufacturing Company Molded fibrous filtration products
US5237986A (en) 1984-09-13 1993-08-24 Minnesota Mining And Manufacturing Company Respirator harness assembly
US4600002A (en) 1984-10-24 1986-07-15 American Optical Corporation Disposable respirator
US4630604A (en) 1985-04-09 1986-12-23 Siebe North, Inc. Valve assembly for a replaceable filter respirator
US4635628A (en) 1985-09-11 1987-01-13 Tecnol, Inc. Surgical face mask with improved moisture barrier
KR890005113Y1 (ko) 1985-10-23 1989-08-02 김영철 방한 및 방풍마스크
US4807619A (en) 1986-04-07 1989-02-28 Minnesota Mining And Manufacturing Company Resilient shape-retaining fibrous filtration face mask
US4688566A (en) 1986-04-25 1987-08-25 Professional Tape Converters, Inc. Filter mask
GB8612070D0 (en) 1986-05-19 1986-06-25 Brown R C Blended-fibre filter material
US4719911A (en) 1986-10-20 1988-01-19 Carrico George L Air filter mask with mouth retention means
EP0266456A1 (de) 1986-11-06 1988-05-11 Moldex-Metric AG & Co.KG Filtrierende Halbmaske
US4827924A (en) 1987-03-02 1989-05-09 Minnesota Mining And Manufacturing Company High efficiency respirator
US4934362A (en) 1987-03-26 1990-06-19 Minnesota Mining And Manufacturing Company Unidirectional fluid valve
FR2621459B1 (fr) 1987-06-17 1990-12-14 Quessette Jacques Alain Dispositif de refrigeration pour vetement thermiquement isolant
US4790306A (en) 1987-09-25 1988-12-13 Minnesota Mining And Manufacturing Company Respiratory mask having a rigid or semi-rigid, insert-molded filtration element and method of making
US5062421A (en) 1987-11-16 1991-11-05 Minnesota Mining And Manufacturing Company Respiratory mask having a soft, compliant facepiece and a thin, rigid insert and method of making
US4873972A (en) 1988-02-04 1989-10-17 Moldex/Metric Products, Inc. Disposable filter respirator with inner molded face flange
JPH01268568A (ja) 1988-04-19 1989-10-26 Danzaburou Takada 加湿マスク
GB8815179D0 (en) 1988-06-25 1988-08-03 Racal Safety Ltd Differential pressure sensor
DE68909707T2 (de) 1988-07-26 1994-02-03 Racal Health & Safety Ltd Atemgerät.
US4951664A (en) 1988-09-09 1990-08-28 Filcon Corporation Mask and method of manufacture
FR2641597B1 (fr) 1989-01-11 1991-04-26 Enjalric Raoul Clapet antiretour pour combinaison de protection
US4930161A (en) 1989-04-10 1990-06-05 Cohen Robert A Medical examination garment
US5486949A (en) 1989-06-20 1996-01-23 The Dow Chemical Company Birefringent interference polarizer
US5035006A (en) 1989-10-25 1991-07-30 Hot Cheeks, Inc. Convertible mask, ascot and visor garment and method of conversion therebetween
CA2019533A1 (en) 1989-11-09 1991-05-09 William H. Hollister Face mask and face mask components
US4981134A (en) 1990-01-16 1991-01-01 Courtney Darryl W Filtering face mask with inhalation/exhalation check valves
US5103337A (en) 1990-07-24 1992-04-07 The Dow Chemical Company Infrared reflective optical interference film
USD326541S (en) 1990-10-23 1992-05-26 Mcbrearty Jr Edward M Face mask
US5099897A (en) 1990-12-04 1992-03-31 Curtin James J Combination cover for golf club bags and towel
US5217794A (en) 1991-01-22 1993-06-08 The Dow Chemical Company Lamellar polymeric body
USD334633S (en) 1991-03-11 1993-04-06 Hans Rudolph, Inc. Mask
US5285816A (en) 1991-12-11 1994-02-15 Rapid Developments Ltd. One way valve
FR2688287B1 (fr) 1992-03-03 1994-07-01 Enjalric Raoul Clapet anti-retour a double sortie pour combinaison de protection.
DE69312509T2 (de) 1992-05-29 1998-02-26 Minnesota Mining & Mfg Rückschlagventil
US7117868B1 (en) 1992-05-29 2006-10-10 3M Innovative Properties Company Fibrous filtration face mask having a new unidirectional fluid valve
US5325892A (en) 1992-05-29 1994-07-05 Minnesota Mining And Manufacturing Company Unidirectional fluid valve
US5753343A (en) 1992-08-04 1998-05-19 Minnesota Mining And Manufacturing Company Corrugated nonwoven webs of polymeric microfiber
USD347299S (en) 1992-10-13 1994-05-24 Minnesota Mining And Manufacturing Company Valve cover
USD347298S (en) 1992-10-13 1994-05-24 Minnesota Mining And Manufacturing Company Valve cover
US5505197A (en) 1992-12-11 1996-04-09 Modex/Metric Products, Inc. Respirator mask with tapered filter mount and valve aligning pins and ears
US5322061B1 (en) 1992-12-16 1998-06-02 Tecnol Med Prod Inc Disposable aerosol mask
US5394568A (en) 1993-01-28 1995-03-07 Minnesota Mining And Manufacturing Company Molded head harness
US5360659A (en) 1993-05-24 1994-11-01 The Dow Chemical Company Two component infrared reflecting film
KR100336012B1 (ko) 1993-08-17 2002-10-11 미네소타 마이닝 앤드 매뉴팩춰링 캄파니 일렉트릿필터매체를하전시키는방법
US5464010A (en) 1993-09-15 1995-11-07 Minnesota Mining And Manufacturing Company Convenient "drop-down" respirator harness structure and method of use
USD366697S (en) 1993-10-04 1996-01-30 Tecnol Medical Products, Inc. Combined molded cone style face mask and visor
US5355910A (en) 1993-10-13 1994-10-18 Trw Inc. Dual component flap
US5446925A (en) 1993-10-27 1995-09-05 Minnesota Mining And Manufacturing Company Adjustable face shield
US5724964A (en) 1993-12-15 1998-03-10 Tecnol Medical Products, Inc. Disposable face mask with enhanced fluid barrier
US5882774A (en) 1993-12-21 1999-03-16 Minnesota Mining And Manufacturing Company Optical film
US5561863A (en) 1994-10-04 1996-10-08 Kimberly-Clark Corporation Surgical face mask
USD412573S (en) 1994-10-14 1999-08-03 3M Innovative Properties Company Nose clip for a filtering face mask
US5579761A (en) 1995-01-20 1996-12-03 Minnesota Mining And Manufacturing Company Respirator having snap-fit filter cartridge
US6277178B1 (en) 1995-01-20 2001-08-21 3M Innovative Properties Company Respirator and filter cartridge
USD377979S (en) 1995-05-23 1997-02-11 Minnesota Mining And Manufacturing Company Diaper fastening tab closure
JPH0910343A (ja) 1995-06-30 1997-01-14 Shigematsu Seisakusho:Kk 吸気弁
GB9515987D0 (en) 1995-08-04 1995-10-04 Racal Health & Safety Ltd Filter mask with eye sheild
GB9515986D0 (en) 1995-08-04 1995-10-04 Racal Health & Safety Ltd Uni-directional fluid valve
GB2304054B (en) 1995-08-04 1999-06-09 Racal Health & Safety Ltd Filter mask with eye shield
US5908598A (en) 1995-08-14 1999-06-01 Minnesota Mining And Manufacturing Company Fibrous webs having enhanced electret properties
US5617849A (en) 1995-09-12 1997-04-08 Minnesota Mining And Manufacturing Company Respirator having thermochromic fit-indicating seal
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
US5696199A (en) 1995-12-07 1997-12-09 Minnesota Mining And Manufacturing Company Pressure-sensitive adhesive polyacrylate polymer and method of making
USD380545S (en) 1996-02-22 1997-07-01 Uni-Charm Corporation Disposable sanitary mask
KR100497280B1 (ko) 1996-02-29 2005-07-01 미네소타 마이닝 앤드 매뉴팩춰링 캄파니 공동 연속상을 갖는 광학 필름
US5825543A (en) 1996-02-29 1998-10-20 Minnesota Mining And Manufacturing Company Diffusely reflecting polarizing element including a first birefringent phase and a second phase
JPH09239050A (ja) 1996-03-06 1997-09-16 Yoshihiro Nishio 口や鼻を覆う様々なマスク及びスキ−のフェ−スマスク用の隙間埋め部材、及び同部材を顔面防具と一体化したくもり止め付き顔面防護マスク
US5724677A (en) 1996-03-08 1998-03-10 Minnesota Mining And Manufacturing Company Multi-part headband and respirator mask assembly and process for making same
US5813398A (en) 1996-03-29 1998-09-29 Tecnol Medical Products, Inc. Combined anti fog and anti glare features for face masks
US5701893A (en) 1996-05-20 1997-12-30 Survivair, Inc. Disposable face mask
US5617749A (en) 1996-05-30 1997-04-08 Dusan Metals, Inc. Door lock
US5699791A (en) 1996-06-04 1997-12-23 Kimberley Clark Corporation Universal fit face mask
USD389239S (en) 1996-08-19 1998-01-13 Moldex-Metric, Inc. Valve
USD431647S (en) 1996-09-06 2000-10-03 3M Innovative Properties Company Personal respiratory protection device having an exhalation valve
USD424688S (en) 1996-09-06 2000-05-09 3M Innovative Properties Company Respiratory protection mask
US5924420A (en) 1996-09-24 1999-07-20 Minnesota Mining And Manufacturing Company Full face respirator mask having integral connectors disposed in lens area
USD384152S (en) 1996-10-10 1997-09-23 The Procter & Gamble Company Diaper fastening tab
USD384151S (en) 1996-10-10 1997-09-23 The Procter & Gamble Company Diaper fastening tab
US5819731A (en) 1997-01-03 1998-10-13 Minnesota Mining And Manufacturing Company Face mask having a combination adjustable ear loop and drop down band
USD416323S (en) 1997-01-24 1999-11-09 3M Innovative Properties Company Bond pattern for a personal respiratory protection device
US6186140B1 (en) 1997-03-14 2001-02-13 3M Innovative Properties Company Respiratory filter element having a storage device for keeping track of filter usage and a system for use therewith
US5927280A (en) 1997-03-17 1999-07-27 San-M Package Co., Ltd. Mask
US5865172A (en) 1997-04-08 1999-02-02 The Board Of Regents Of The University Of Texas System Method and apparatus for induction of inhaled pharmacological agent by a pediatric patient
US5975893A (en) 1997-06-20 1999-11-02 Align Technology, Inc. Method and system for incrementally moving teeth
US6041782A (en) 1997-06-24 2000-03-28 3M Innovative Properties Company Respiratory mask having comfortable inner cover web
JP3045995U (ja) 1997-08-06 1998-02-20 谷山化学工業株式会社 形状保持型マスク
US5906507A (en) 1997-08-07 1999-05-25 Howard; James R. Foldable electrical cord
GB2329128A (en) 1997-09-15 1999-03-17 Minnesota Mining & Mfg Nose clip for a respiratory mask
US6062221A (en) 1997-10-03 2000-05-16 3M Innovative Properties Company Drop-down face mask assembly
GB9723740D0 (en) 1997-11-11 1998-01-07 Minnesota Mining & Mfg Respiratory masks incorporating valves or other attached components
US6116236A (en) 1997-11-12 2000-09-12 Wyss; Gerard J. Respirator
US6102039A (en) 1997-12-01 2000-08-15 3M Innovative Properties Company Molded respirator containing sorbent particles
US6026511A (en) 1997-12-05 2000-02-22 3M Innovative Properties Company Protective article having a transparent shield
CN1220901A (zh) 1997-12-26 1999-06-30 沈阳机电研究设计院 防止眼镜起雾的口罩
US6207260B1 (en) 1998-01-13 2001-03-27 3M Innovative Properties Company Multicomponent optical body
AU2314899A (en) 1998-01-13 1999-08-02 Minnesota Mining And Manufacturing Company Modified copolyesters and improved multilayer reflective films
US6531230B1 (en) 1998-01-13 2003-03-11 3M Innovative Properties Company Color shifting film
US6045894A (en) 1998-01-13 2000-04-04 3M Innovative Properties Company Clear to colored security film
US6808658B2 (en) 1998-01-13 2004-10-26 3M Innovative Properties Company Method for making texture multilayer optical films
US6179948B1 (en) 1998-01-13 2001-01-30 3M Innovative Properties Company Optical film and process for manufacture thereof
US6157490A (en) 1998-01-13 2000-12-05 3M Innovative Properties Company Optical film with sharpened bandedge
USD413166S (en) 1998-03-02 1999-08-24 Louis M. Gerson Co., Inc. Face mask breathing valve
US6062220A (en) 1998-03-10 2000-05-16 American Threshold Industries, Inc. Reduced fogging absorbent core face mask
USD420769S (en) 1998-03-12 2000-02-15 White Andre L Face mask for a motorcyclist having a filter pocket
US6354296B1 (en) 1998-03-16 2002-03-12 3M Innovative Properties Company Anti-fog face mask
JP3951437B2 (ja) 1998-04-16 2007-08-01 株式会社豊田自動織機 圧縮機のピストン支持構造
TW349412U (en) 1998-04-21 1999-01-01 Tian-Lu He Structure improvement for gas mask
US5865196A (en) 1998-04-29 1999-02-02 Foote; Mary L. Hair stylist face shield
US6609516B2 (en) 1998-06-17 2003-08-26 Fire Drill, Llc Smoke escape mask
US6432175B1 (en) 1998-07-02 2002-08-13 3M Innovative Properties Company Fluorinated electret
US6584976B2 (en) 1998-07-24 2003-07-01 3M Innovative Properties Company Face mask that has a filtered exhalation valve
IT1301860B1 (it) 1998-07-24 2000-07-07 Fausto Ferraro Dispositivo per la filtrazione dell'aria dotato di mezzi di presa aboccaglio
US6096247A (en) 1998-07-31 2000-08-01 3M Innovative Properties Company Embossed optical polymer films
KR20000004542U (ko) 1998-08-10 2000-03-06 최병순 오토바이 성에방지용 마스크
US6047698A (en) 1998-08-20 2000-04-11 Moldex-Metric, Inc. Unidirectional fluid valve
USD434879S (en) 1998-09-15 2000-12-05 Henry Cole Face mask
US6192967B1 (en) 1998-10-19 2001-02-27 Sunny En Liung Huang Collapsible auto shade
US6139308A (en) 1998-10-28 2000-10-31 3M Innovative Properties Company Uniform meltblown fibrous web and methods and apparatus for manufacturing
USD448472S1 (en) 1999-02-17 2001-09-25 3M Innovative Properties Company Respiratory mask
USD443927S1 (en) 1999-02-17 2001-06-19 3M Innovative Properties Company Respiratory mask
US6210266B1 (en) 1999-03-15 2001-04-03 Sarnamotive Blue Water, Inc. Pressure relief valve and method of manufacturing the same
US6098201A (en) 1999-03-24 2000-08-08 Richard T. Weisenburger Moldable face-mask
US6332465B1 (en) 1999-06-02 2001-12-25 3M Innovative Properties Company Face masks having an elastic and polyolefin thermoplastic band attached thereto by heat and pressure
JP3733451B2 (ja) * 1999-06-24 2006-01-11 年生 坂本 衛生マスク
US6375886B1 (en) 1999-10-08 2002-04-23 3M Innovative Properties Company Method and apparatus for making a nonwoven fibrous electret web from free-fiber and polar liquid
US6406657B1 (en) 1999-10-08 2002-06-18 3M Innovative Properties Company Method and apparatus for making a fibrous electret web using a wetting liquid and an aqueous polar liquid
US6454986B1 (en) 1999-10-08 2002-09-24 3M Innovative Properties Company Method of making a fibrous electret web using a nonaqueous polar liquid
US6604524B1 (en) 1999-10-19 2003-08-12 3M Innovative Properties Company Manner of attaching component elements to filtration material such as may be utilized in respiratory masks
US6729332B1 (en) 1999-10-22 2004-05-04 3M Innovative Properties Company Retention assembly with compression element and method of use
JP2001161843A (ja) 1999-12-14 2001-06-19 Sadaaki Honda マスク
JP3295413B2 (ja) 2000-01-21 2002-06-24 サンエム・パッケージ株式会社 マスク
JP3734660B2 (ja) 2000-01-26 2006-01-11 リーテック株式会社 マスク及びその製造方法
CA2397483A1 (en) 2000-02-09 2001-08-16 3M Innovative Properties Company Filtering face mask that has headband mounts
JP3072027U (ja) 2000-03-27 2000-09-29 憲司 中村 フェイスマスク
US6743464B1 (en) 2000-04-13 2004-06-01 3M Innovative Properties Company Method of making electrets through vapor condensation
KR100783607B1 (ko) 2000-06-23 2007-12-07 삼성전자주식회사 액정표시장치용 백라이트 유니트
USD464725S1 (en) 2000-08-03 2002-10-22 3M Innovative Properties Company Nose portion of a powered air-purifying respirator body
JP2002325855A (ja) 2001-04-27 2002-11-12 Nobuo Yunoki 着脱式マスクノーズクリップ並びに着脱式マスクノーズクリップ付きマスク
US6916440B2 (en) 2001-05-31 2005-07-12 3M Innovative Properties Company Processes and apparatus for making transversely drawn films with substantially uniaxial character
US6883518B2 (en) 2001-06-25 2005-04-26 3M Innovative Properties Company Unidirectional respirator valve
US7849856B2 (en) 2001-06-25 2010-12-14 3M Innovative Properties Company Respirator valve
JP3726886B2 (ja) 2001-06-29 2005-12-14 興研株式会社 呼吸装置
JP3579835B2 (ja) 2001-07-03 2004-10-20 西川ゴム工業株式会社 自動車用ウエザーストリップおよび同連続押出成形装置
JP3622958B2 (ja) 2001-08-03 2005-02-23 株式会社サンロード マスク
JP2003047688A (ja) 2001-08-06 2003-02-18 Fuji Shoji:Kk スロットマシン
US7028689B2 (en) 2001-11-21 2006-04-18 3M Innovative Properties Company Filtering face mask that uses an exhalation valve that has a multi-layered flexible flap
JP2003236000A (ja) 2002-02-21 2003-08-26 Michihiro Oe マスク
JP2003265635A (ja) 2002-03-15 2003-09-24 Takashi Kosaka 救急用簡易呼吸確認器
US6995665B2 (en) 2002-05-17 2006-02-07 Fireeye Development Incorporated System and method for identifying, monitoring and evaluating equipment, environmental and physiological conditions
KR200292141Y1 (ko) 2002-05-28 2002-10-14 이부경 건강용 마스크
US7677248B2 (en) 2002-06-05 2010-03-16 Louis M. Gerson Co., Inc. Stiffened filter mask
WO2003103425A1 (en) 2002-06-05 2003-12-18 Louis M. Gerson Co., Inc. Face mask and method of manufacturing the same
US20050001728A1 (en) 2003-06-27 2005-01-06 Appelt Daren R. Equipment and method for identifying, monitoring and evaluating equipment, environmental and physiological conditions
WO2004017882A2 (en) 2002-08-22 2004-03-04 Kimberly-Clark Worldwide, Inc. Absorbent article having dual pattern bonding
US6978782B2 (en) 2002-08-27 2005-12-27 Amad Tayebi Full face mask
US20040040562A1 (en) 2002-08-28 2004-03-04 Brunell Robert A. Mask and spherically configured valve
US20040261795A1 (en) 2002-08-28 2004-12-30 Brunell Robert A. Respirator mask and valve
US6948499B2 (en) 2002-09-24 2005-09-27 Kimberly-Clark Worldwide, Inc. Easy gripping face mask
US6945249B2 (en) 2002-09-24 2005-09-20 Kimberly-Clark Worldwide, Inc. Easy gripping face mask
KR200301992Y1 (ko) 2002-09-27 2003-01-29 이상호 착용 및 제거가 용이한 방진마스크
US20040078860A1 (en) 2002-10-25 2004-04-29 Bell Daryl Steven Single piece face mask
JP2004173777A (ja) 2002-11-25 2004-06-24 Shinya Kajiura マスク
US6949212B2 (en) 2002-11-27 2005-09-27 3M Innovative Properties Company Methods and devices for stretching polymer films
US7064897B2 (en) 2002-12-31 2006-06-20 3M Innovative Properties Company Optical polarizing films with designed color shifts
KR100510164B1 (ko) 2003-03-12 2005-08-25 이용철 일회용 방진마스크
KR200321107Y1 (ko) 2003-04-18 2003-07-22 이상호 방진마스크의 걸이밴드 조절구조
USD567365S1 (en) 2003-04-25 2008-04-22 Louis M. Gerson Co., Inc. Pleated face mask
US20040226563A1 (en) 2003-05-12 2004-11-18 Zhaoxia Xu Face Mask with Double Breathing Chambers
US6988500B1 (en) 2003-05-15 2006-01-24 J. Palmero Sales Company, Inc. Fog free medical face mask
US6754909B1 (en) 2003-05-21 2004-06-29 John Samelian Neck gator
JP2005034618A (ja) 2003-06-10 2005-02-10 Gofuku Iryo Kk マスク
US7188622B2 (en) 2003-06-19 2007-03-13 3M Innovative Properties Company Filtering face mask that has a resilient seal surface in its exhalation valve
JP2005013492A (ja) 2003-06-26 2005-01-20 Nippon Medical Products Co Ltd マスク
TWM243223U (en) 2003-08-27 2004-09-11 China Textile Inst Mask having stereoscopic structure
CN1593690A (zh) * 2003-09-08 2005-03-16 中国科学院过程工程研究所 一种防尘防病毒口罩
KR200348888Y1 (ko) 2004-02-02 2004-04-29 이용철 마스크용 걸이밴드 조절구
TWI270390B (en) 2003-09-09 2007-01-11 Lee Yong Chuol Disposable dust protective mask
JP3101212U (ja) 2003-10-24 2004-06-10 株式会社ダイセン マスク
TWI244399B (en) 2003-11-11 2005-12-01 Taiwan Textile Res Inst Three-dimensionally structured mask
US7036507B2 (en) 2003-12-18 2006-05-02 Alpha Pro Tech Inc. Filter mask
US8091550B2 (en) 2003-12-22 2012-01-10 Kimberly-Clark Worldwide, Inc. Face mask having baffle layer for improved fluid resistance
US7019905B2 (en) 2003-12-30 2006-03-28 3M Innovative Properties Company Multilayer reflector with suppression of high order reflections
ITPS20040007A1 (it) 2004-02-18 2004-05-18 Cl Com Advanced Tecnology Srl Maschera di protezione contro gli agenti biologici
USD546942S1 (en) 2004-04-01 2007-07-17 3M Innovative Properties Company Exhalation valve filter
KR100529000B1 (ko) 2004-05-08 2005-11-21 원덕수 기능성 마스크
JP2005348998A (ja) 2004-06-11 2005-12-22 Ifu:Kk マスク
USD567937S1 (en) 2004-07-16 2008-04-29 Louis M. Gerson Co., Inc. Pleated face mask
US7802572B2 (en) 2004-09-20 2010-09-28 Sutter West Bay Hospitals Face mask
JP3108880U (ja) 2004-11-19 2005-04-28 株式会社ティー・エイチ・ティー 衛生マスク
US8622059B2 (en) 2004-12-21 2014-01-07 Kimberly-Clark Worldwide, Inc. Face mask with absorbent element
US7290545B2 (en) 2004-12-23 2007-11-06 Kimberly-Clark Worldwide, Inc. Face mask with anti-fog folding
US7178528B2 (en) 2005-03-01 2007-02-20 Lau Greg Y Headgear for noninvasive ventilation interface
US20060212996A1 (en) 2005-03-25 2006-09-28 Mcgrath Mark M Face mask having an interior pouch
JP2006314618A (ja) 2005-05-13 2006-11-24 Kao Corp フェイスマスク
JP4574437B2 (ja) 2005-05-20 2010-11-04 ユニ・チャーム株式会社 簡易マスク包装体
JP4570536B2 (ja) * 2005-08-24 2010-10-27 白十字株式会社 立体型マスク
US8171933B2 (en) 2005-08-25 2012-05-08 3M Innovative Properties Company Respirator having preloaded nose clip
FR2889916B1 (fr) 2005-08-26 2007-11-02 Maco Pharma Sa Masque de protection respiratoire comprenant un moyen d'inviolabilite
US20070078528A1 (en) 2005-09-21 2007-04-05 Juergen Anke Predictive fault determination for a non-stationary device
US20070068529A1 (en) 2005-09-27 2007-03-29 Suresh Kalatoor Respirator that uses a polymeric nose clip
KR200408137Y1 (ko) 2005-11-21 2006-02-07 백소라 호흡이 편한 마스크
US7503326B2 (en) 2005-12-22 2009-03-17 3M Innovative Properties Company Filtering face mask with a unidirectional valve having a stiff unbiased flexible flap
US20070175477A1 (en) 2005-12-23 2007-08-02 Baggett Richard W Personal protection, procedural and surgical mask
GB2433701B (en) 2005-12-29 2010-03-24 Medinnova As Valve for a breathing apparatus
USD542407S1 (en) 2006-01-12 2007-05-08 Resmed Limited Vent for respiratory mask
US20070272248A1 (en) 2006-04-28 2007-11-29 Flora Lin Elastic nonwoven face mask
KR100886253B1 (ko) * 2006-05-03 2009-02-27 박성원 일회용 마스크
US20070283964A1 (en) 2006-05-25 2007-12-13 William Gorman Reusable exhalation valve & mouthpiece for use with filtering face mask
FR2903610B1 (fr) 2006-07-13 2009-02-20 Bacou Dalloz Plaintel Soc Par Masque respiratoire individuel visible dans l'obscurite.
US7858163B2 (en) 2006-07-31 2010-12-28 3M Innovative Properties Company Molded monocomponent monolayer respirator with bimodal monolayer monocomponent media
US9770058B2 (en) 2006-07-17 2017-09-26 3M Innovative Properties Company Flat-fold respirator with monocomponent filtration/stiffening monolayer
US7905973B2 (en) 2006-07-31 2011-03-15 3M Innovative Properties Company Molded monocomponent monolayer respirator
AU2007342322B2 (en) 2006-07-31 2010-07-29 3M Innovative Properties Company Flat-fold respirator with monocomponent filtration/stiffening monolayer
US8029723B2 (en) 2006-07-31 2011-10-04 3M Innovative Properties Company Method for making shaped filtration articles
JP4612606B2 (ja) 2006-10-04 2011-01-12 興研株式会社 ブロワー付マスク装置
US7766015B2 (en) 2006-11-03 2010-08-03 Primed Medical Products Inc. Air filtering soft face mask
US20080105261A1 (en) 2006-11-03 2008-05-08 Primed Medical Products Inc. Air filtering soft face mask
US20080178884A1 (en) 2007-01-25 2008-07-31 Gerson Ronald L Fluid Valve with Center Post
US20080271740A1 (en) 2007-05-03 2008-11-06 3M Innovative Properties Company Maintenance-free flat-fold respirator that includes a graspable tab
USD708734S1 (en) 2007-05-03 2014-07-08 3M Innovative Properties Company Respiratory mask
US20080271739A1 (en) * 2007-05-03 2008-11-06 3M Innovative Properties Company Maintenance-free respirator that has concave portions on opposing sides of mask top section
US9770611B2 (en) 2007-05-03 2017-09-26 3M Innovative Properties Company Maintenance-free anti-fog respirator
US9642403B2 (en) 2007-08-16 2017-05-09 Kimberly-Clark Worldwide, Inc. Strap fastening system for a disposable respirator providing improved donning
US20090044811A1 (en) 2007-08-16 2009-02-19 Kimberly-Clark Worldwide, Inc. Vent and strap fastening system for a disposable respirator providing improved donning
JP5449170B2 (ja) 2007-09-20 2014-03-19 スリーエム イノベイティブ プロパティズ カンパニー 伸展可能なマスク本体を有するフィルタリング顔面装着レスピレータ
US20090078264A1 (en) 2007-09-20 2009-03-26 3M Innovative Properties Company Filtering face-piece respirator having a frame for supporting the exhalation valve
RU2428233C1 (ru) 2007-09-20 2011-09-10 3М Инновейтив Пропертиз Компани Респиратор с динамической опорной структурой и складчатым фильтрующим элементом
JP5345147B2 (ja) 2007-09-20 2013-11-20 スリーエム イノベイティブ プロパティズ カンパニー リビングヒンジを有する濾過フェースピースレスピレータ支持構造体
USD637711S1 (en) 2007-10-05 2011-05-10 3M Innovative Properties Company Bond pattern on a filtering face-piece respirator
AU2008311137B2 (en) 2007-10-09 2011-10-27 3M Innovative Properties Company Filtering face-piece respirator having nose clip molded into the mask body
JP3138154U (ja) 2007-10-11 2007-12-20 株式会社ユタカメイク マスク
GB0722247D0 (en) 2007-11-13 2007-12-27 Intersurgical Ag Improvements relating to anti-asphyxiation valves
BRPI0819440B8 (pt) 2007-11-14 2023-01-31 Ric Investments Llc conjunto de máscara, e, kit de conjunto de máscara
US8757156B2 (en) 2007-11-27 2014-06-24 3M Innovative Properties Company Face mask with unidirectional multi-flap valve
US8061356B2 (en) 2008-02-19 2011-11-22 Prestige Ameritech Ltd. Directional flat face mask
US8430100B2 (en) 2008-02-25 2013-04-30 Prestige Ameritech Ltd. Universal fit face mask
US20090235934A1 (en) 2008-03-24 2009-09-24 3M Innovative Properties Company Filtering face-piece respirator having an integrally-joined exhalation valve
JP2009254418A (ja) 2008-04-11 2009-11-05 Three M Innovative Properties Co マスク用ノーズクリップ及びマスク
US8113201B2 (en) 2008-06-30 2012-02-14 Kimberly-Clark Worldwide, Inc. Collapse resistant respirator
CN201270776Y (zh) 2008-08-05 2009-07-15 康审稼 自夹式免松紧带的口罩
KR100891701B1 (ko) 2008-09-01 2009-04-03 장정산업 주식회사 4면 방진마스크
US20140135668A1 (en) 2012-11-10 2014-05-15 Hugo Andres Belalcazar Cardio-pulmonary resuscitation airway valve and devices
US20100065058A1 (en) 2008-09-18 2010-03-18 Moldex-Metric, Inc. Full face respirator mask
US11083916B2 (en) 2008-12-18 2021-08-10 3M Innovative Properties Company Flat fold respirator having flanges disposed on the mask body
US9012013B2 (en) 2008-12-18 2015-04-21 3M Innovative Properties Company Expandable face mask with reinforcing netting
US8074660B2 (en) 2008-12-18 2011-12-13 3M Innovative Properties Company Expandable face mask with engageable stiffening element
EP2373725A4 (en) 2008-12-22 2017-07-26 3M Innovative Properties Company Multilayer optical films having side-by-side mirror/polarizer zones
CN102292291A (zh) 2009-01-12 2011-12-21 科学与工业研究委员会 利用TiO2-多壁碳纳米管(MWCNT)纳米复合物的高效染料敏化太阳能电池
JPWO2010103688A1 (ja) 2009-03-12 2012-09-10 株式会社重松製作所 マスク
DE102009022529A1 (de) 2009-05-25 2010-12-02 Paul Hartmann Ag Gefalteter Inkontinenzartikel
US20120097167A1 (en) 2009-06-12 2012-04-26 Kenichi Ono Mask with nosal cushion
WO2011025094A1 (ko) 2009-08-28 2011-03-03 (주)파인텍 마스크
US8640704B2 (en) 2009-09-18 2014-02-04 3M Innovative Properties Company Flat-fold filtering face-piece respirator having structural weld pattern
JP5432668B2 (ja) 2009-10-27 2014-03-05 三井化学株式会社 マスク
CN201543133U (zh) 2009-11-23 2010-08-11 盛同飞 支架口罩
CN201551752U (zh) 2009-11-23 2010-08-18 盛同飞 切角口罩
CN201550643U (zh) 2009-12-10 2010-08-18 张元� 一种口罩用眼镜防雾夹
USD676527S1 (en) 2009-12-16 2013-02-19 3M Innovative Properties Company Unidirectional valve
US8365771B2 (en) 2009-12-16 2013-02-05 3M Innovative Properties Company Unidirectional valves and filtering face masks comprising unidirectional valves
TWM380141U (en) 2009-12-24 2010-05-11 Jing-Zhi Lin Three-dimensional gauze mask
US20110180078A1 (en) 2010-01-26 2011-07-28 Mckinley Jared Face Mask With Adjustable And Detachable Straps
JP5436262B2 (ja) 2010-02-19 2014-03-05 ユニ・チャーム株式会社 マスク
US9097858B2 (en) 2010-06-30 2015-08-04 3M Innovative Properties Company Retarder film combinations with spatially selective birefringence reduction
NZ605250A (en) 2010-06-30 2014-10-31 3M Innovative Properties Co Multi-layer articles capable of forming color images and methods of forming color images
EP2589041B1 (en) 2010-06-30 2018-04-25 3M Innovative Properties Company Light directing film
AU2011271445B2 (en) 2010-06-30 2014-10-02 3M Innovative Properties Company Multi-layer articles capable of forming color images and methods of forming color images
CN103038678B (zh) 2010-06-30 2015-06-03 3M创新有限公司 具有空间选择性双折射减小的漫反射光学膜
CN103038681B (zh) 2010-06-30 2016-09-28 3M创新有限公司 使用具有空间选择性双折射减小的膜的掩模加工
KR20120012520A (ko) 2010-08-02 2012-02-10 주식회사 에버그린 방진 마스크의 제조방법
US10668308B2 (en) 2010-08-31 2020-06-02 Crosstex International, Inc. Filter mask having one or more malleable stiffening members
EP2436425B1 (en) 2010-10-01 2014-05-07 Moldex-Metric AG & Co. KG Uni-directional valve, filtering face mask
US20120090615A1 (en) 2010-10-19 2012-04-19 Lin-Pin Chen Separably assembled filtering respirator
US20120125341A1 (en) 2010-11-19 2012-05-24 3M Innovative Properties Company Filtering face-piece respirator having an overmolded face seal
RU2013125285A (ru) 2010-12-29 2015-02-10 3М Инновейтив Пропертиз Компани Респиратор, содержащий клапан с аблированной створкой
US20120167891A1 (en) 2011-01-03 2012-07-05 John Smaller Adjustable facial conforming face mask
US20140202469A1 (en) 2011-01-03 2014-07-24 Balboa Manufacturing Company, Llc Adjustable facial conforming face mask
JP3167135U (ja) 2011-01-26 2011-04-07 馥筑興業有限会社 立体構造マスク
EP2486815A1 (en) 2011-02-14 2012-08-15 Sperian Protection Armor Flat-folded mask forming trihedrals in an opened state
CN201967734U (zh) 2011-04-27 2011-09-14 董延玲 防尘口罩
JP2012232080A (ja) 2011-05-02 2012-11-29 Takayuki Mizushima マスク
CN202618364U (zh) 2011-07-01 2012-12-26 丛东明 防浓烟逃生口罩
US8424507B2 (en) 2011-08-31 2013-04-23 Caterpillar Inc. Retarding system
US8839815B2 (en) 2011-12-15 2014-09-23 Honeywell International Inc. Gas valve with electronic cycle counter
US9081147B2 (en) 2012-01-03 2015-07-14 3M Innovative Properties Company Effective media retarder films with spatially selective birefringence reduction
US9498592B2 (en) 2012-01-23 2016-11-22 Aeon Research And Technology, Inc. Modular pulmonary treatment system
US9247775B2 (en) 2012-01-23 2016-02-02 Daio Paper Corporation Mask
CN202588368U (zh) 2012-02-21 2012-12-12 上海博化化工产品有限公司 杯型防尘口罩
CN202456521U (zh) 2012-03-08 2012-10-03 于振艳 传染病护理用防护口罩
CN202552239U (zh) 2012-03-30 2012-11-28 苏州新纶超净技术有限公司 一种平面折叠口罩
TWM435859U (en) 2012-04-19 2012-08-21 Qi Cai Universal design skin beautifying facial mask structure featuring easy unfolding
US8578515B1 (en) 2012-07-13 2013-11-12 Jeanette N. Petersen Child's robe and sleeping bag
JP5972092B2 (ja) 2012-08-06 2016-08-17 サンエムパッケージ 株式会社 マスク
US9950130B2 (en) 2012-09-04 2018-04-24 Fisher & Paykel Healthcare Limited Valsalva mask
DE102012109916A1 (de) 2012-10-17 2014-04-17 Tracoe Medical Gmbh Sprechventil
US10182603B2 (en) 2012-12-27 2019-01-22 3M Innovative Properties Company Filtering face-piece respirator having strap-activated folded flange
US11116998B2 (en) 2012-12-27 2021-09-14 3M Innovative Properties Company Filtering face-piece respirator having folded flange
JP2014200316A (ja) 2013-04-01 2014-10-27 友治 松浦 ノーズピース
US20140326255A1 (en) 2013-05-06 2014-11-06 Mei-Sheng Teng Medical Face Mask with Sealing Strip
US20140326245A1 (en) 2013-05-06 2014-11-06 Mei-Sheng Teng Medical Face Mask with Sealing Strip
TWM464196U (zh) 2013-07-01 2013-11-01 Lei Ying Plastic Co Ltd 可摺疊之三面式立體口罩
USD746974S1 (en) 2013-07-15 2016-01-05 3M Innovative Properties Company Exhalation valve flap
RU2642340C2 (ru) 2013-07-15 2018-01-24 3М Инновейтив Пропертиз Компани Респиратор с оптически активным клапаном выдоха
US9770057B2 (en) 2013-08-29 2017-09-26 3M Innovative Properties Company Filtering face-piece respirator having nose cushioning member
US20150101617A1 (en) 2013-10-14 2015-04-16 3M Innovative Properties Company Filtering Face-Piece Respirator With Increased Friction Perimeter
FR3014209B1 (fr) 2013-11-29 2017-03-03 Commissariat Energie Atomique Dispositif d'extension de pupille de sortie et viseur tete haute comportant ce dispositif
GB201421615D0 (en) 2014-12-04 2015-01-21 3M Innovative Properties Co Respirator nosepiece
GB201421617D0 (en) 2014-12-04 2015-01-21 3M Innovative Properties Co Respirator tab
GB201421616D0 (en) 2014-12-04 2015-01-21 3M Innovative Properties Co Respirator headband
GB201421618D0 (en) 2014-12-04 2015-01-21 3M Innovative Properties Co Respirator valve
GB201421620D0 (en) 2014-12-04 2015-01-21 3M Innovative Properties Co Flat-fold respirator
EP3270816B1 (en) 2015-03-17 2019-07-10 Brainlab AG Surgical drape for patient registration and a registration method utilizing such surgical drape
GB201508114D0 (en) 2015-05-12 2015-06-24 3M Innovative Properties Co Respirator tab
RU2702244C1 (ru) 2015-11-11 2019-10-07 3М Инновейтив Пропертиз Компани Сохраняющий форму респиратор, складываемый до плоского состояния
US10964155B2 (en) 2019-04-12 2021-03-30 Aristocrat Technologies Australia Pty Limited Techniques and apparatuses for providing blended graphical content for gaming applications using a single graphics context and multiple application programming interfaces

Patent Citations (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US715052A (en) * 1902-06-19 1902-12-02 Robert Lee Harper Mouth and nose guard.
US3971369A (en) * 1975-06-23 1976-07-27 Johnson & Johnson Folded cup-like surgical face mask and method of forming the same
US4850347A (en) * 1980-06-09 1989-07-25 Metric Products, Inc. Face mask
US4319567A (en) * 1980-07-07 1982-03-16 Moldex/Metric Products, Inc. Disposable face mask
US4641645A (en) * 1985-07-15 1987-02-10 New England Thermoplastics, Inc. Face mask
US5025506A (en) * 1989-09-28 1991-06-25 Huang James R C One piece mask body having vertically stitched nose accomodating portion
US7131442B1 (en) * 1990-12-20 2006-11-07 Minnesota Mining And Manufacturing Company Fibrous filtration face mask
US5419318A (en) * 1991-05-21 1995-05-30 Better Breathing, Inc. Breathing mask
US5628308A (en) * 1994-01-19 1997-05-13 Harges, Jr.; Cordell F. Heat and fire resistant respiratory filtration mask
US5558089A (en) * 1994-10-13 1996-09-24 Minnesota Mining And Manufacturing Company Respirator nose clip
US6886563B2 (en) * 1995-03-09 2005-05-03 3M Innovative Properties Company Flat-folded personal respiratory protection devices and processes for preparing same
US20050139218A1 (en) * 1995-03-09 2005-06-30 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
US20030015201A1 (en) * 1995-09-11 2003-01-23 Bostock Graham J. Processes for preparing flat-folded personal respiratory protection devices
US5704063A (en) * 1995-11-16 1998-01-06 Tilden; Mark Face covering
US5717991A (en) * 1995-11-30 1998-02-17 Ni-Charm Corporation Disposable sanitary mask
US6102040A (en) * 1996-03-26 2000-08-15 Tayebi; Amad Breathing mask
USD620104S1 (en) * 1996-11-25 2010-07-20 3M Innovative Properties Company Personal respiratory protection device
USD459471S1 (en) * 1996-11-25 2002-06-25 3M Innovative Properties Company Personal respiratory protection device that has a three panelled look
US5884336A (en) * 1997-06-20 1999-03-23 Stout; Kathleen K. Cold weather mask including a mouth seal having a direct flow through porous hygroscopic material
US6173712B1 (en) * 1998-04-29 2001-01-16 Kimberly-Clark Worldwide, Inc. Disposable aerosol mask with disparate portions
US6394090B1 (en) * 1999-02-17 2002-05-28 3M Innovative Properties Company Flat-folded personal respiratory protection devices and processes for preparing same
US6257235B1 (en) * 1999-05-28 2001-07-10 Kimberly-Clark Worldwide, Inc. Face mask with fan attachment
USD449377S1 (en) * 2000-05-09 2001-10-16 3M Innovative Properties Company Tabs on a personal respiratory protection device
US6460539B1 (en) * 2000-09-21 2002-10-08 3M Innovative Properties Company Respirator that includes an integral filter element, an exhalation valve, and impactor element
US20020056450A1 (en) * 2000-11-10 2002-05-16 Lee Kun Woo Anti-fogging mask
US20040011362A1 (en) * 2002-07-18 2004-01-22 3M Innovative Properties Company Crush resistant filtering face mask
US6923182B2 (en) * 2002-07-18 2005-08-02 3M Innovative Properties Company Crush resistant filtering face mask
US6827764B2 (en) * 2002-07-25 2004-12-07 3M Innovative Properties Company Molded filter element that contains thermally bonded staple fibers and electrically-charged microfibers
US6823868B1 (en) * 2002-10-17 2004-11-30 Paul G. Begum Travel mask
US20050016544A1 (en) * 2002-10-24 2005-01-27 Thornton W. Keith Custom fitted mask and method of forming same
US20060174890A1 (en) * 2005-02-04 2006-08-10 Center Healthcare Technology Co., Ltd. Nasal adjuster
USD575390S1 (en) * 2005-06-30 2008-08-19 3M Innovative Properties Company Exhalation valve filter
US20070084469A1 (en) * 2005-10-11 2007-04-19 Mcdonald Thomas K Breathing mask and regulator for aircraft
USD613850S1 (en) * 2007-07-31 2010-04-13 3M Innovative Properties Company Respirator mask body

Cited By (88)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10980962B2 (en) 2004-02-23 2021-04-20 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US11471635B2 (en) 2004-02-23 2022-10-18 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US11395894B2 (en) 2004-02-23 2022-07-26 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US10842964B2 (en) 2004-02-23 2020-11-24 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US11712532B2 (en) 2004-04-02 2023-08-01 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US10463825B2 (en) 2004-04-02 2019-11-05 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US11260194B2 (en) 2006-07-14 2022-03-01 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US11291790B2 (en) 2006-07-14 2022-04-05 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US11357944B2 (en) 2006-07-14 2022-06-14 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US20100042139A1 (en) * 2006-10-02 2010-02-18 Norina Honegger Device for reshaping bones
US10827787B2 (en) 2007-05-03 2020-11-10 3M Innovative Properties Company Maintenance-free respirator that has concave portions on opposing sides of mask top section
US11904191B2 (en) 2007-05-03 2024-02-20 3M Innovative Properties Company Anti-fog respirator
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
US7913640B2 (en) * 2007-11-09 2011-03-29 Kimberly-Clark Worldwide, Inc. Moisture indicator for heat and moisture exchange devices
US20090120432A1 (en) * 2007-11-09 2009-05-14 Macdonald John Gavin Moisture indicator for heat and moisture exchange devices
US10792451B2 (en) 2008-05-12 2020-10-06 Fisher & Paykel Healthcare Limited Patient interface and aspects thereof
US20110203593A1 (en) * 2008-05-15 2011-08-25 Uni-Charm Corporation Mask
US11554234B2 (en) 2008-07-18 2023-01-17 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US11541197B2 (en) 2008-07-18 2023-01-03 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US11660413B2 (en) 2008-07-18 2023-05-30 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US11179535B2 (en) 2008-10-10 2021-11-23 Fisher & Paykel Healthcare Limited Nasal pillows for a patient interface
CN102018300A (zh) * 2009-09-18 2011-04-20 3M创新有限公司 具有对称标记的水平平折过滤式面罩呼吸器
WO2011062843A2 (en) * 2009-11-18 2011-05-26 3M Innovative Properties Company Reinforced filter media
US10130833B2 (en) 2009-11-18 2018-11-20 3M Innovative Properties Company Reinforced filter media
WO2011062843A3 (en) * 2009-11-18 2011-09-15 3M Innovative Properties Company Reinforced filter media
CN102630176A (zh) * 2009-11-18 2012-08-08 3M创新有限公司 强化过滤介质
US8967147B2 (en) * 2009-12-30 2015-03-03 3M Innovative Properties Company Filtering face-piece respirator having an auxetic mesh in the mask body
US20110155137A1 (en) * 2009-12-30 2011-06-30 3M Innovative Properties Company Filtering face-piece respirator having an auxetic mesh in the mask body
WO2011163002A3 (en) * 2010-06-25 2012-05-24 3M Innovative Properties Company Respirator that has inward nose region fold with high level conformation
US10835702B2 (en) 2010-10-08 2020-11-17 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US11766535B2 (en) 2010-10-08 2023-09-26 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US11247013B2 (en) 2010-10-08 2022-02-15 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US11559650B2 (en) 2010-10-08 2023-01-24 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US20120160247A1 (en) * 2010-12-22 2012-06-28 Quincy Iii Roger B Splash Resistant Facemask
US11883591B2 (en) 2011-04-15 2024-01-30 Fisher & Paykel Healthcare Limited Interface comprising a rolling nasal bridge portion
US11559647B2 (en) 2011-04-15 2023-01-24 Fisher & Paykel Healthcare Limited Interface comprising a nasal sealing portion
US10828440B2 (en) 2011-04-15 2020-11-10 Fisher & Paykle Healthcare Limited Interface comprising a rolling nasal bridge portion
US10828441B2 (en) 2011-04-15 2020-11-10 Fisher & Paykel Healthcare Limited Interface comprising a rolling nasal bridge portion
US10828443B2 (en) 2011-04-15 2020-11-10 Fisher & Paykel Healthcare Limited Interface comprising a rolling nasal bridge portion
US10828442B2 (en) 2011-04-15 2020-11-10 Fisher & Paykel Healthcare Limited Interface comprising a rolling nasal bridge portion
US10835697B2 (en) 2011-04-15 2020-11-17 Fisher & Paykel Healthcare Limited Interface comprising a rolling nasal bridge portion
US10842955B2 (en) 2011-04-15 2020-11-24 Fisher & Paykel Healthcare Limited Interface comprising a rolling nasal bridge portion
US10603456B2 (en) 2011-04-15 2020-03-31 Fisher & Paykel Healthcare Limited Interface comprising a nasal sealing portion
US11065406B2 (en) 2011-04-15 2021-07-20 Fisher & Paykel Healthcare Limited Interface comprising a rolling nasal bridge portion
US11786686B2 (en) 2011-07-01 2023-10-17 Fisher & Paykel Healthcare Limited Nasal mask interface assembly
US10653854B2 (en) 2011-07-01 2020-05-19 Fisher & Paykel Healthcare Limited Nasal mask interface assembly
USD972716S1 (en) 2011-09-16 2022-12-13 Fisher & Paykel Healthcare Limited Headgear assembly
USD917040S1 (en) 2011-09-16 2021-04-20 Fisher & Paykel Healthcare Limited Headstrap of a headgear assembly
USD1016273S1 (en) 2011-09-16 2024-02-27 Fisher & Paykel Healthcare Limited Seal
EP2589413A3 (en) * 2011-11-03 2014-01-01 San Huei United Co., Ltd. Foldable respirator
TWI454296B (pt) * 2011-11-03 2014-10-01
US11806452B2 (en) 2012-08-08 2023-11-07 Fisher & Paykel Healthcare Limited Headgear for patient interface
US10946155B2 (en) 2012-09-04 2021-03-16 Fisher & Paykel Healthcare Limited Valsalva mask
US11065412B2 (en) 2012-09-04 2021-07-20 Fisher & Paykel Healthcare Limited Valsalva mask
US10307556B2 (en) 2013-06-13 2019-06-04 Koninklijke Philips N.V. Patient interface devices with adhesive attachnment
US12005277B2 (en) 2013-07-15 2024-06-11 3M Innovative Properties Company Respirator having optically active exhalation valve
US10040621B2 (en) 2014-03-20 2018-08-07 3M Innovative Properties Company Filtering face-piece respirator dispenser
US10518054B2 (en) 2014-08-25 2019-12-31 Fisher & Paykel Healthcare Limited Respiratory mask and related portions, components or sub-assemblies
US11305084B2 (en) 2014-08-25 2022-04-19 Fisher & Paykel Healthcare Limited Respiratory mask and related portions, components or sub-assemblies
CN112205689A (zh) * 2015-05-12 2021-01-12 3M创新有限公司 呼吸器突片
WO2017066284A1 (en) 2015-10-12 2017-04-20 3M Innovative Properties Company Filtering face-piece respirator including functional material and method of forming same
AU2016341973B2 (en) * 2015-10-22 2019-03-14 Scott Technologies, Inc. Respirator mask with eyewear interface
WO2017070455A1 (en) * 2015-10-22 2017-04-27 Scott Technologies, Inc. Respirator mask with eyewear interface
WO2017083289A1 (en) 2015-11-11 2017-05-18 3M Innovative Properties Company Shape retaining flat-fold respirator
US11213080B2 (en) * 2015-11-11 2022-01-04 3M Innovative Properties Company Shape retaining flat-fold respirator
US20180368494A1 (en) * 2015-11-11 2018-12-27 3M Innovative Properties Company Shape Retaining Flat-Fold Respirator
EP3374035A4 (en) * 2015-11-11 2019-06-12 3M Innovative Properties Company FLAT PLATFORM HOLDING RESPIRATOR
US20170360125A1 (en) * 2016-06-20 2017-12-21 Ronald Tuan Gauze mask with folding lines capable of enabling the gauze mask to be folded into a flat package or unfolded into a three dimensional configuration
US10357069B2 (en) * 2016-06-20 2019-07-23 Ronald Tuan Gauze mask with folding lines capable of enabling the gauze mask to be folded into a flat package or unfolded into a three dimensional configuration
US11813581B2 (en) 2017-07-14 2023-11-14 3M Innovative Properties Company Method and adapter for conveying plural liquid streams
USD899585S1 (en) * 2017-10-12 2020-10-20 Jsp Limited Respiratory mask
US20200390167A1 (en) * 2018-01-03 2020-12-17 3M Innovative Properties Company Respirator Including Transversely-Extending Pleat And Method Of Forming Same
US20190290943A1 (en) * 2018-03-21 2019-09-26 Dräger Safety AG & Co. KGaA Breathing half mask
USD926988S1 (en) * 2018-06-29 2021-08-03 3M Innovative Properties Company Chin tab
USD982753S1 (en) 2018-06-29 2023-04-04 3M Innovative Properties Company Respirator device
WO2020053786A3 (en) * 2018-09-14 2020-06-04 3M Innovative Properties Company Respirator including adjustable strap and method of forming same
US20220062674A1 (en) * 2018-12-21 2022-03-03 Dräger Safety AG & Co. KGaA Breathing half mask and process for manufacturing a breathing half mask
USD1010102S1 (en) * 2019-05-23 2024-01-02 Milwaukee Electric Tool Corporation Respirator mask
CN110787384A (zh) * 2019-08-09 2020-02-14 3M创新有限公司 面罩本体及面罩
USD998785S1 (en) * 2020-02-18 2023-09-12 Cranberry International Sdn Bhd Respiratory mask
USD983356S1 (en) 2020-06-17 2023-04-11 Shock Doctor, Inc. Face covering
USD1006217S1 (en) 2020-06-17 2023-11-28 Shock Doctor, Inc. Face covering
US20210392966A1 (en) * 2020-06-17 2021-12-23 Shock Doctor, Inc. Face coverings for use with mouthguards and garments including such face coverings
US10888130B1 (en) * 2020-07-17 2021-01-12 Pegasos One, LLC Face shield for personal protection
US11206880B1 (en) * 2020-07-17 2021-12-28 Pegasos One, LLC Face shield for personal protection
EP4011478A1 (de) * 2020-12-08 2022-06-15 Sandler AG Vliesstoffmaterial zur herstellung einer atemschutzmaske sowie atemschutzmaske
WO2022185142A1 (de) 2021-03-01 2022-09-09 Flawa Consumer Gmbh Atemschutzmaske
EP4349419A1 (en) * 2022-10-07 2024-04-10 3M Innovative Properties Company Disposable, flat-fold respirator having increased stiffness in selected areas

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US20180027899A1 (en) 2018-02-01
EP2428127A3 (en) 2012-08-15
KR20100017127A (ko) 2010-02-16
US11877604B2 (en) 2024-01-23
BRPI0809786B1 (pt) 2019-07-16
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EP2175751A1 (en) 2010-04-21
US20230363475A1 (en) 2023-11-16
CN101668445B (zh) 2012-10-10
JP2010525875A (ja) 2010-07-29
US20210015184A1 (en) 2021-01-21
EP2175751B1 (en) 2011-11-02
WO2008137205A1 (en) 2008-11-13
ATE531284T1 (de) 2011-11-15
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US10827787B2 (en) 2020-11-10
EP2428127A2 (en) 2012-03-14

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