CA3065616A1 - A face shield with adjustable head band and air ventilation - Google Patents
A face shield with adjustable head band and air ventilation Download PDFInfo
- Publication number
- CA3065616A1 CA3065616A1 CA3065616A CA3065616A CA3065616A1 CA 3065616 A1 CA3065616 A1 CA 3065616A1 CA 3065616 A CA3065616 A CA 3065616A CA 3065616 A CA3065616 A CA 3065616A CA 3065616 A1 CA3065616 A1 CA 3065616A1
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- Prior art keywords
- face
- elongate body
- face shield
- sheet
- shield
- 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.)
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- 210000003128 head Anatomy 0.000 claims abstract description 81
- 239000000463 material Substances 0.000 claims abstract description 29
- 210000001061 forehead Anatomy 0.000 claims abstract description 22
- 210000004243 sweat Anatomy 0.000 claims description 8
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 4
- 239000004417 polycarbonate Substances 0.000 claims description 4
- 229920000515 polycarbonate Polymers 0.000 claims description 4
- 239000004816 latex Substances 0.000 claims description 3
- 229920000126 latex Polymers 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims description 2
- 229920008790 Amorphous Polyethylene terephthalate Polymers 0.000 claims 1
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 19
- -1 PETG Substances 0.000 description 6
- 210000004400 mucous membrane Anatomy 0.000 description 6
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- 230000001681 protective effect Effects 0.000 description 2
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- 239000004433 Thermoplastic polyurethane Substances 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
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- 239000007789 gas Substances 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 208000002672 hepatitis B Diseases 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
- A41D13/1184—Protective face masks, e.g. for surgical use, or for use in foul atmospheres with protection for the eyes, e.g. using shield or visor
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
ABSTRACT
A face shield comprising a face portion, a head band portion and a head strap portion. The face portion comprises a sheet having a transparent viewing area. The head band portion is attached to an inner side of the sheet and extends at least partially across an upper end of the sheet between side edges of the sheet, the head band portion comprising an elongate body made of a compressible material and having an inner face arranged to rest against a forehead of a user. The elongate body defines an air vent extending from an upper face of the elongate body to a lower face of the elongate body, and at least one recessed portion on the inner face which is arranged to be spaced from the user's forehead in use. The head strap portion comprises a strap extending between the two side edges of the face portion.
A face shield comprising a face portion, a head band portion and a head strap portion. The face portion comprises a sheet having a transparent viewing area. The head band portion is attached to an inner side of the sheet and extends at least partially across an upper end of the sheet between side edges of the sheet, the head band portion comprising an elongate body made of a compressible material and having an inner face arranged to rest against a forehead of a user. The elongate body defines an air vent extending from an upper face of the elongate body to a lower face of the elongate body, and at least one recessed portion on the inner face which is arranged to be spaced from the user's forehead in use. The head strap portion comprises a strap extending between the two side edges of the face portion.
Description
FACE SHIELDS
FIELD OF THE DISCLOSURE
[0001] The present disclosure relates to face shields, and more specifically although not exclusively, to face shields used in the medical field.
BACKGROUND OF THE DISCLOSURE
FIELD OF THE DISCLOSURE
[0001] The present disclosure relates to face shields, and more specifically although not exclusively, to face shields used in the medical field.
BACKGROUND OF THE DISCLOSURE
[0002] Personal protective equipment devices (PPEs), particularly face shields, protect a face of a user and associated mucous membranes of the eyes, nose and mouth of the user from airborne matter.
[0003] In the medical field, face shields are used to protect the user from chemical splashes, infectious diseases (e.g. Hepatitis B, HIV), and airborne body fluids (e.g. blood, saliva, bronchial secretions, vomit, urine). Face shields are used during different medical procedures such as suctioning a patient's airway, placing nasogastric tubes, obstetrical procedures, surgery, etc.
[0004] Full protection of the face and associated mucous membranes in the medical field is traditionally achieved by use of multiple combinations of PPEs including head caps, goggles and surgical masks. This is not only cumbersome and expensive but can often leave small areas of the face unprotected, where airborne matter can make contact with the user's skin and mucous membranes.
[0005] Face shields are an alternative PPE for protecting the face and mucous membranes of a user. However, conventional face shields often suffer from fogging of a shield portion reducing visibility, and they tend to retain heat, thus becoming uncomfortable to the user over prolonged periods of use.
[0006] Therefore, there is a need for face shields which overcome or reduce at least some of the above-described problems.
13526786.2 SUMMARY OF THE DISCLOSURE
13526786.2 SUMMARY OF THE DISCLOSURE
[0007] Broadly, there is provided a face shield for protecting a face and associated mucous membranes of the eyes, nose and mouth, of a user from airborne matter. In certain embodiments, the face shield of the present technology addresses certain shortcomings of prior art face shields, such as those of US 4,825,878; US 4,965,887; US
2018/0343938, and US 7,725,949.
2018/0343938, and US 7,725,949.
[0008] Particularly, the current developers have noted that conventional face shields suffer from several disadvantages, including for example: partial protection of the face of the user, obstruction of the view of the user, limited use with other PPEs such as goggles or glasses, obstruction of verbal and non-verbal facial communication, requiring individual fitting to accommodate the wide variation in user head size, being cumbersome to adjust and fit to a user's head size, and requiring assembly at point of use.
[0009] From one aspect, there is provided a face shield comprising: a face portion, the face portion comprising a sheet having a transparent viewing area, the sheet having an inner side, an upper end, a lower end and two side edges; a head band portion attached to the inner side of the sheet of the face portion and extending at least partially across the upper end of the sheet between the two side edges of the sheet, the head band portion comprising an elongate body made of a compressible material and having an inner face arranged to rest against a forehead of a user; the elongate body defining: at least one air vent extending from an upper face of the elongate body to a lower face of the elongate body; at least one recessed portion on the inner face of the elongate body which is arranged to be spaced from the user's forehead in use; and a head strap portion, the head strap portion comprising a strap extending between the two side edges of the face portion.
[0010] From another aspect, there is provided a face shield comprising: a face portion, the face portion comprising a sheet having a transparent viewing area, the sheet having an inner side, an upper end, a lower end and two side edges; a head band head portion attached to the inner side of the sheet of the face portion and extending at least partially across the upper end of the sheet between the two side edges of the sheet, the head band portion comprising an elongate body made of a compressible material and having an inner face arranged to rest against a forehead of a user in use; the elongate body defining: at least one air vent extending 13526786.2 from an upper face of the elongate body to a lower face of the elongate body, the at least one air vent comprising a channel having side walls and an open end at the inner face, an upper portion of the side walls proximate the inner face being spaced closer together than a lower portion of the side walls proximate a base of the channel; and a head strap portion, the head strap portion comprising a strap extending between the two side edges of the face portion.
[0011] In certain embodiments of any one or more of the preceding aspects, the at least one air vent comprises a channel having side walls and an open end at the inner face, an upper portion of the side walls proximate the inner face being spaced closer together than a lower portion of the side walls proximate a base of the channel.
[0012] In certain embodiments of any one or more of the preceding aspects, the face shield further comprises at least one recessed portion defined on the inner face of the elongate body, arranged to be spaced from the user's forehead in use.
[0013] In certain embodiments of any one or more of the preceding aspects, the at least one recessed portion extends from the upper face of the elongate body to the lower face of the elongate body.
[0014] In certain embodiments of any one or more of the preceding aspects, at least one recessed portion has a concave configuration.
[0015] In certain embodiments of any one or more of the preceding aspects, the at least one recessed portion comprises two recessed portions, each of the two recessed portions spaced outwardly of the at least one cooling passage.
[0016] In certain embodiments of any one or more of the preceding aspects, the at least one recessed portion extends away from the inner face of the elongate body by a recessed portion depth, and the at least one air vent extends away from the inner face of the elongate body by a air vent depth, the recessed portion depth being less than the air vent depth.
[0017] In certain embodiments of any one or more of the preceding aspects, the elongate body defines two air vents, the two cooling passages being spaced from another along the elongate body.
I 3526786.2
I 3526786.2
[0018] In certain embodiments of any one or more of the preceding aspects, each cooling passage is positioned one on either side of a midline of the face shield, the midline positioned centrally between the two side edges and extending from the upper end to the lower end of the sheet.
[0019] In certain embodiments of any one or more of the preceding aspects, the base of the channel is substantially parallel to the inner side of the sheet of the face portion.
[0020] In certain embodiments of any one or more of the preceding aspects, the air vent is arranged such that the side walls of the channel meet the base of the channel at an angle.
[0021] In certain embodiments of any one or more of the preceding aspects, the face shield is arranged to be bent between an as-made configuration and an in-use configuration;
wherein, in the as-made configuration the side walls are spaced from one another, and in the in-use configuration, the side walls contact one another at contact regions at the upper portion of the side walls.
wherein, in the as-made configuration the side walls are spaced from one another, and in the in-use configuration, the side walls contact one another at contact regions at the upper portion of the side walls.
[0022] In certain embodiments of any one or more of the preceding aspects, the angle between the side walls and the base of the channel in one or more of the as-made configuration and the in-use configuration is about 45-90 degrees, about 45-80 degrees, 45-70 degrees, 45-60 degrees, 45-50 degrees, or about 45 degrees.
[0023] In certain embodiments of any one or more of the preceding aspects, the channel is sized and shaped such that increasing a magnitude of the bend causes the compressible material to compress at the contact region whilst maintaining the air vent open.
[0024] In certain embodiments of any one or more of the preceding aspects, the compressible material is a self-restoring material such as a foam.
[0025] In certain embodiments of any one or more of the preceding aspects, the thickness of the elongate body is about 4 cm.
13526786.2
13526786.2
[0026] In certain embodiments of any one or more of the preceding aspects, the transparent viewing area is substantially flat.
[0027] In certain embodiments of any one or more of the preceding aspects, the strap comprises a resiliently extensible band. In certain embodiments, the resiliently extensible band is made of a latex-free material.
[0028] In certain embodiments of any one or more of the preceding aspects, the strap has a width of between about 20 mm and about 30 mm.
[0029] In certain embodiments of any one or more of the preceding aspects, the head strap portion comprises clips for attaching the strap to the face portion.
[0030] In certain embodiments of any one or more of the preceding aspects, the distance between the clips is longer than an unstretched configuration of the strap.
[0031] In certain embodiments of any one or more of the preceding aspects, the face shield further comprises a drape portion attachable to the lower end of the sheet of the face portion, wherein the drape portion is arranged to extend a length of the face shield.
[0032] In certain embodiments of any one or more of the preceding aspects, the drape portion includes fasteners on a lower portion of the drape portion for reducing a width of the drape portion.
[0033] In certain embodiments of any one or more of the preceding aspects, the fasteners are a hook and loop type fastener.
[0034] In certain embodiments of any one or more of the preceding aspects, the drape portion comprises a non-woven impermeable material.
[0035] In certain embodiments of any one or more of the preceding aspects, the face portion is made of a material selected from: PVC, PET, PETG, OPS, polycarbonate and APET.
13526786.2
13526786.2
[0036] In certain embodiments of any one or more of the preceding aspects, the face shield is latex free.
[0037] In certain embodiments of any one or more of the preceding aspects, the face shield further comprises a sweat band attachable to the inner face of the elongate body.
[0038] From another aspect, there is provided a face shield comprising: a face portion, the face portion comprising a sheet having a transparent viewing area, the sheet having an inner side, an upper end, a lower end and two side edges; a drape portion attachable to the lower end of the sheet of the face portion, wherein the drape portion is arranged to extend a length of the face shield; a head band portion attached to the inner side of the sheet of the face portion and extending at least partially across the upper end of the sheet between the two side edges of the sheet, the head band portion comprising an elongate body made of a compressible material and having an inner face arranged to rest against a forehead of a user, the elongate body defining: at least one air vent extending from an upper face of the elongate body to a lower face of the elongate body; at least one recessed portion on the inner face of the elongate body which is arranged to be spaced from the user's forehead in use; and a head strap portion, the head strap portion comprising a strap extending between the two side edges of the face portion.
Definitions:
Definitions:
[0039] It must be noted that, as used in this specification and the appended claims, the singular form "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.
[0040] As used herein, the term "about" in the context of a given value or range refers to a value or range that is within 20%, preferably within 10%, and more preferably within 5% of the given value or range.
[0041] As used herein, the term "and/or" is to be taken as specific disclosure of each of the two specified features or components with or without the other. For example "A
and/or B" is 13526786.2 to be taken as specific disclosure of each of (i) A, (ii) B and (iii) A and B, just as if each is set out individually herein.
BRIEF DESCRIPTION OF DRAWINGS
and/or B" is 13526786.2 to be taken as specific disclosure of each of (i) A, (ii) B and (iii) A and B, just as if each is set out individually herein.
BRIEF DESCRIPTION OF DRAWINGS
[0042] Further aspects and advantages of the present invention will become better understood with reference to the description in association with the following in which:
[0043] FIG. 1 illustrates a front view of a face shield on a face of a user in use, the face shield comprising a face portion and a head band portion, according to certain embodiments of the present technology.
[0044] FIG. 2 illustrates a profile view of the face shield of FIG. 1, according to certain embodiments of the present technology.
[0045] FIG. 3 illustrates a back view of the face shield of FIG. 1 with the user removed for clarity, according to certain embodiments of the present technology.
[0046] FIG. 4A illustrates a top view of the head band portion of the face shield of FIG. I, according to certain embodiments of the present technology.
[0047] FIG. 4B illustrates a close-up view of a portion of the head band portion of the face shield of FIG. 4A, including an air vent, according to certain embodiments of the present technology.
[0048] FIG. 4C illustrates a close-up view of a portion of the head band portion of the face shield of FIG. 4A, including a recessed portion, according to certain embodiments of the present technology.
[0049] FIG. 5 illustrates a front view of a face shield including a face portion, a head band portion and a drape portion, according to certain embodiments of the present technology.
[0050] FIG. 6 illustrates a profile view of the face shield of FIG. 5, according to certain embodiments of the present technology.
13526786.2
13526786.2
[0051] FIG.7 illustrates a back view of the face shield of FIG. 5, according to certain embodiments of the present technology.
[0052] FIG. 8 illustrates a perspective view of an alternative embodiment of the head band portion of the face shield of FIG. 1, according to certain embodiments of the present technology.
[0053] FIG. 9 illustrates a perspective view of an alternative embodiment of the head band portion of the face shield of FIG. 1, according to certain embodiments of the present technology.
[0054] FIG. 10 illustrates a perspective view of an alternative embodiment of the head band portion of the face shield of FIG. 1, according to certain embodiments of the present technology.
[0055] FIG. 11 illustrates a perspective view of an alternative embodiment of the head band portion of the face shield of FIG. 1, according to certain other embodiments of the present technology.
[0056] FIG. 12 illustrates a top view of another embodiment of the face shield of FIG. 1, according to certain embodiments of the present technology.
DETAILED DESCRIPTION
DETAILED DESCRIPTION
[0057] The present disclosure is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The disclosure is capable of other embodiments and of being practiced or of being carried out in various ways. Also, the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including", "comprising", or "having", "containing", "involving" and variations thereof herein, is meant to encompass the items listed thereafter as well as, optionally, additional items. In the following description, the same numerical references refer to similar elements.
13526786.2 100581 Broadly, there is provided a face shield for protecting a face and associated mucous membranes of the eyes, nose and mouth, of a user from airborne matter such as splashes, sprays and spatter of liquids, gases, particles, and other debris and contaminants. The face shield can be used in medical settings, such as to avoid contact with potential contaminants such as airborne bodily fluids during medical procedures. It can also be used in laboratory settings, such as in the handling of chemicals, biological samples and animals. The embodiments described below will be described in relation to a medical setting although the technology is not limited to such. The face shield can be used in any setting in which contact of a user's face with a contaminant is desired, for example, in processing of electronics, during construction, gardening, agricultural processes, food processing, painting, wood working, and the like.
100591 Referring initially to FIGS. 1-4, there is shown a face shield 10 comprising a face portion 12 arranged to cover a face 14 of a user 16 whilst allowing the user to see through it, a head band portion 18 attached to an upper end 20 of the face portion 12 and arranged to rest against a forehead 22 of the user 16, and a head strap portion 24 (FIGS. 2 and 3) extending between side edges 26, 28 of the face portion 12, and arranged to go around a head of the user 16 to secure the face shield 10 relative to the face 14 of the user 16 when in use. The face shield 10 is arranged to provide protection to the user's face whilst also providing comfort as well as functionality. By functionality is meant one or more of an unimpeded view (e.g. 180 degree wide angle), minimal or no fogging of the face shield, and little or no impact on breathing resistance and vocalization. In certain embodiments, by comfort is meant minimal or no retention of heat between the face shield and the face of the user. Certain embodiments of the present technology also permit the user to comfortably wear glasses under the face shield 10.
100601 Turning initially to the face portion 12, best seen in FIGS 1-3, the face portion 12 comprises a sheet or pane 30 sized and shaped to cover the user's face 14. The sheet 30 has a transparent viewing area 32 through which the user 16 can see therethrough. At least the viewing area 32 of the sheet 30 is substantially flat, whereas other portions of the sheet 30 may have a curvature. In the illustrated embodiment of the face shield 10, the entire sheet 30 is transparent. The sheet 30 has an inner side 34, an outer side 36, an upper end 38, a lower end 40 and two side edges 42, 44.
[0061] A width of the face portion 12 (distance between the two side edges 42, 44 at their furthest points) is defined as the face portion width 46 and is arranged to cover the user's face 14 between the user's ears. In the embodiments of FIGS 1-3, the face portion width 46 is about 33 cm. In certain embodiments, the face portion width 46 is between about 30 cm and about 40 cm, between about 30 cm and about 38 cm, between about 32 cm and about 38 cm, between about 32 cm and about 36 cm, between about 32 cm and about 34 cm.
[0062] A length of the face portion 12 (distance between the upper end 38 and the lower end 40 of the sheet 30) is defined as the face portion length 48 and is arranged to cover the user's face 14 from the forehead 22 to at least a portion of the user's neck.
In the embodiments of FIGS. 1-3, the face portion length 48 is between about 20 cm and about 30 cm, and more specifically 23 cm. In other embodiments, the face portion length 48 may be adapted for use with different size user heads. In certain embodiments, the face portion length 48 is between about 20 cm and about 28 cm, between about 20 cm and about 26 cm, between about 20 cm and about 24 cm, or between about 22 cm and about 24 cm.
[0063] The sheet 30 of the face portion 12 comprises a transparent material which is arranged to provide optical clarity. The material may be arranged to avoid or minimize glare.
The sheet 30 is configured, in terms of curvature, to provide a substantially flat viewing area 32, in order to reduce or minimize distortion. The sheet 30 is flexible and permits a degree of bending in order to conform to the shape of the user's head.
[0064] Examples of materials suitable for the face portion 12 include, but are not limited to, polyvinyl chloride (PVC), polyethylene terephthalate (PET), poly-ethylene terephthalate glycol (PETG), oriented polystyrene (OPS), polycarbonate, amorphous polyethylene terephthlate (APET), and the like.
[0065] In some embodiments, the face portion 12 is treated with anti-fog agents. Anti-fog agents comprise surfactants, and hydrophilic solutions that minimize the surface tension of water, and/or maximize the surface energy. Anti-fog agents suitable for treatment of the face portion 12 may be in the form of liquid, gel, spray, gel or wipes and may be applied on the face portion 12 during manufacture or prior to use by the user 16.
[0066] In certain embodiments, the face shield 10 further comprises a drape portion 50, best seen in FIGS 5-7, attachable to the lower end 40 of the sheet 30 of the face portion 12.
13526786.2 The drape portion 50 is arranged to extend the face portion length 48 and thereby the extent of protection. The drape portion 50 has an inner side 52, an outer side 54, an upper end 56, a lower end 58 and two side edges 60 and 62. The drape portion 50 together with the face portion 12 are arranged to protect the face 14 of the user 16 in a wrap-around manner, thus .. protecting the front, sides, top and bottom of the face 14 of the user 16 when in use. The drape portion 50 may be composed of non-woven impermeable materials of synthetic and/or natural origin, which may further be chemically treated. In certain embodiments, the drape portion 50 for example, may be made of propylene fabric with a polymer film or thermoplastic polyurethanes, polyvinyl chlorides, polyamides, polyimides, polyolefins polyethylene and polypropylene, polyesters polyethylene terephthalate, polystyrenes, nylons, acetals, block polymers polystyrene materials with elastomeric segments, polycarbonates, thermoplastic elastomers polyolefin, polyester or nylon types and copolymers and blends thereof.
100671 In the embodiments of FIGS 5-7, the face portion 12 with the drape portion 50 has a length 64 of about 38cm. In other embodiments, the face portion 12 with the drape portion 50 has a length 64 of between about 30 and about 40 cm, between about 32 cm and about 40 cm, between about 34 cm and about 40 cm, between about 36 cm and about 40 cm, or between about 37 cm and about 39 cm.
100681 Attachment of the drape portion to the sheet 30 is by any suitable means such as adhesive or the like.
100691 Furthermore, in certain embodiments, the drape portion 50 comprises a fastener 66 on the inner side 52 of the drape portion 50, and positioned at the lower end
13526786.2 100581 Broadly, there is provided a face shield for protecting a face and associated mucous membranes of the eyes, nose and mouth, of a user from airborne matter such as splashes, sprays and spatter of liquids, gases, particles, and other debris and contaminants. The face shield can be used in medical settings, such as to avoid contact with potential contaminants such as airborne bodily fluids during medical procedures. It can also be used in laboratory settings, such as in the handling of chemicals, biological samples and animals. The embodiments described below will be described in relation to a medical setting although the technology is not limited to such. The face shield can be used in any setting in which contact of a user's face with a contaminant is desired, for example, in processing of electronics, during construction, gardening, agricultural processes, food processing, painting, wood working, and the like.
100591 Referring initially to FIGS. 1-4, there is shown a face shield 10 comprising a face portion 12 arranged to cover a face 14 of a user 16 whilst allowing the user to see through it, a head band portion 18 attached to an upper end 20 of the face portion 12 and arranged to rest against a forehead 22 of the user 16, and a head strap portion 24 (FIGS. 2 and 3) extending between side edges 26, 28 of the face portion 12, and arranged to go around a head of the user 16 to secure the face shield 10 relative to the face 14 of the user 16 when in use. The face shield 10 is arranged to provide protection to the user's face whilst also providing comfort as well as functionality. By functionality is meant one or more of an unimpeded view (e.g. 180 degree wide angle), minimal or no fogging of the face shield, and little or no impact on breathing resistance and vocalization. In certain embodiments, by comfort is meant minimal or no retention of heat between the face shield and the face of the user. Certain embodiments of the present technology also permit the user to comfortably wear glasses under the face shield 10.
100601 Turning initially to the face portion 12, best seen in FIGS 1-3, the face portion 12 comprises a sheet or pane 30 sized and shaped to cover the user's face 14. The sheet 30 has a transparent viewing area 32 through which the user 16 can see therethrough. At least the viewing area 32 of the sheet 30 is substantially flat, whereas other portions of the sheet 30 may have a curvature. In the illustrated embodiment of the face shield 10, the entire sheet 30 is transparent. The sheet 30 has an inner side 34, an outer side 36, an upper end 38, a lower end 40 and two side edges 42, 44.
[0061] A width of the face portion 12 (distance between the two side edges 42, 44 at their furthest points) is defined as the face portion width 46 and is arranged to cover the user's face 14 between the user's ears. In the embodiments of FIGS 1-3, the face portion width 46 is about 33 cm. In certain embodiments, the face portion width 46 is between about 30 cm and about 40 cm, between about 30 cm and about 38 cm, between about 32 cm and about 38 cm, between about 32 cm and about 36 cm, between about 32 cm and about 34 cm.
[0062] A length of the face portion 12 (distance between the upper end 38 and the lower end 40 of the sheet 30) is defined as the face portion length 48 and is arranged to cover the user's face 14 from the forehead 22 to at least a portion of the user's neck.
In the embodiments of FIGS. 1-3, the face portion length 48 is between about 20 cm and about 30 cm, and more specifically 23 cm. In other embodiments, the face portion length 48 may be adapted for use with different size user heads. In certain embodiments, the face portion length 48 is between about 20 cm and about 28 cm, between about 20 cm and about 26 cm, between about 20 cm and about 24 cm, or between about 22 cm and about 24 cm.
[0063] The sheet 30 of the face portion 12 comprises a transparent material which is arranged to provide optical clarity. The material may be arranged to avoid or minimize glare.
The sheet 30 is configured, in terms of curvature, to provide a substantially flat viewing area 32, in order to reduce or minimize distortion. The sheet 30 is flexible and permits a degree of bending in order to conform to the shape of the user's head.
[0064] Examples of materials suitable for the face portion 12 include, but are not limited to, polyvinyl chloride (PVC), polyethylene terephthalate (PET), poly-ethylene terephthalate glycol (PETG), oriented polystyrene (OPS), polycarbonate, amorphous polyethylene terephthlate (APET), and the like.
[0065] In some embodiments, the face portion 12 is treated with anti-fog agents. Anti-fog agents comprise surfactants, and hydrophilic solutions that minimize the surface tension of water, and/or maximize the surface energy. Anti-fog agents suitable for treatment of the face portion 12 may be in the form of liquid, gel, spray, gel or wipes and may be applied on the face portion 12 during manufacture or prior to use by the user 16.
[0066] In certain embodiments, the face shield 10 further comprises a drape portion 50, best seen in FIGS 5-7, attachable to the lower end 40 of the sheet 30 of the face portion 12.
13526786.2 The drape portion 50 is arranged to extend the face portion length 48 and thereby the extent of protection. The drape portion 50 has an inner side 52, an outer side 54, an upper end 56, a lower end 58 and two side edges 60 and 62. The drape portion 50 together with the face portion 12 are arranged to protect the face 14 of the user 16 in a wrap-around manner, thus .. protecting the front, sides, top and bottom of the face 14 of the user 16 when in use. The drape portion 50 may be composed of non-woven impermeable materials of synthetic and/or natural origin, which may further be chemically treated. In certain embodiments, the drape portion 50 for example, may be made of propylene fabric with a polymer film or thermoplastic polyurethanes, polyvinyl chlorides, polyamides, polyimides, polyolefins polyethylene and polypropylene, polyesters polyethylene terephthalate, polystyrenes, nylons, acetals, block polymers polystyrene materials with elastomeric segments, polycarbonates, thermoplastic elastomers polyolefin, polyester or nylon types and copolymers and blends thereof.
100671 In the embodiments of FIGS 5-7, the face portion 12 with the drape portion 50 has a length 64 of about 38cm. In other embodiments, the face portion 12 with the drape portion 50 has a length 64 of between about 30 and about 40 cm, between about 32 cm and about 40 cm, between about 34 cm and about 40 cm, between about 36 cm and about 40 cm, or between about 37 cm and about 39 cm.
100681 Attachment of the drape portion to the sheet 30 is by any suitable means such as adhesive or the like.
100691 Furthermore, in certain embodiments, the drape portion 50 comprises a fastener 66 on the inner side 52 of the drape portion 50, and positioned at the lower end
58 of the drape portion 50. The fastener 66 comprises two fastener elements 66 attachable to one another.
The fastener elements 66 are positioned at a point below the chin of the user 16 when in use.
When the two fastener elements 66 are attached to one another, an effective width 67 of the drape portion can be reduced. In other words, the fastener 66 may be used to reduce the width 67 of the drape portion 50 beneath the chin of the user 16 and thereby reduce access of airborne contaminants upwardly to the face 14 of the user from between the face shield 10 and the face 14 of the user 16. In some embodiments, the fastener 66 is a hook and loop type fastener. In other embodiments, the fastener 66 is one or more of a snap fastener, a magnetic fastener, a clip, and the like.
13526786.2 [0070] Turning now to the head band portion 18, best seen in FIGS. 3, 4A-4C, 8-11. The head band portion 18 is arranged to provide an additional barrier to the face 14 of the user 16 (e.g. from downwardly moving contaminants) whilst spacing the sheet 30 from the face 14 of the user 16. The head band portion 18 is also arranged for comfort to the user 16. The head band portion 18 is attached to the inner side 34 of the sheet 30 of the face portion 12 and extends at least partially across the upper end 38 of the sheet 30 between the two side edges 42, 44 of the sheet 30. The head band portion 18 comprises an elongate body 68 made of compressible material which has an upper face 70, a lower face 72 (FIG. 3), and an inner face 74, the inner face being arranged to rest against the forehead 22 of the user 16. An outer face of the head band portion 18 is attached to the inner face 34 of the sheet 30.
Attachment may be by adhesive or any other means.
[0071] The elongate body 68 of the head band portion 18 is made of a self-restoring resilient material, such as foam, which molds to the contour of the forehead 22 of the user 16 for a comfortable and secure fit when in use. Generally, in an in-use configuration, the elongate body 68 is more bent than in an as-made configuration. In certain embodiments, the elongate body 68 is made of a hypoallergenic material. The elongate body 68 may also be absorbant, such as for absorbing sweat. In certain embodiments, the elongate body 68 is sterilizable. Examples of suitable materials for the elongate body 68 comprise foams or other configurations of material made of polystyrene, polyurethane, polyvinyl acetal and the like.
The elongate body 68 may be formed by molding, 3D printing, or cutting such as by milling, sawing or using lasers to create a desired shape and configuration of the elongate body 68.
[0072] The elongate body 68 has an elongate body thickness 76 which is arranged to space the face portion 12 of the face shield 10 from the face 14 of the user 16 so as to reduce or minimize the impact of the face shield 10 on breathing and/or vocalization of the user 16. The inner face 74 is spaced from the sheet 30 by the elongate body thickness 76.
Furthermore, the elongate body thickness 76 may be selected so as to accommodate for usage of additional personal protective equipment such as goggles, eye glasses and respirators. In the embodiments of FIGS 3, 4A, 8-11, the elongate body thickness 76 is about 4 cm.
In other embodiments, the elongate body thickness 76 is about 3 cm to about 8 cm, between about 3 cm to about 7 cm, between about 3 cm to about 6 cm, between about 3 cm to about 5 cm, or between about 3 cm to about 4 cm.
13526786.2 [0073] The elongate body 68 defines two air vents 78 extending through the elongate body 68, between the upper face 70 and the lower face 72 of the elongate body 68.
Each of the air vents 78 provides a passage for air to flow, such as warm air upwardly and away from the face 14 of the user 16 in use. This can help to keep the user 16 cool and to prevent fogging of the sheet 30 during use.
[0074] As seen in FIGS 4A and 4B, each air vent 78 comprises a channel 80 formed in the elongate body 68, the channel 80 having two side walls 82, and a base 90. Each channel 80 has an open end 84 at the inner face 74 of the elongate body (FIG. 4B). A
spacing of the side walls at the open end 84 is less than a width of the base 90 of the channel 80. A cross-sectional shape of the channel 80 is triangular, in certain embodiments. Other cross-sectional shapes are also within the scope of the present technology such as trapezoidal, rectangular, square, and diamond (FIGS. 8-10).
[0075] Generally, the face shield 10 is arranged to be bent between an as-made configuration and an in-use configuration. In the as-made configuration, the open end 84 is in an open configuration in which the side walls 82 of the air vent 78 are spaced from one another. In the in-use configuration, the open end 84 is in a closed configuration in which the side walls 82 contact one another at contact regions 92 at the upper portion 86 of the side walls 82. Each channel 80 is sized and shaped such that increasing a curvature in the face shield 10, in the in-use configuration, causes the compressible material of the elongate body 68 to compress the upper portion 86 of the side walls 82 at the contact region 92, whilst maintaining the channel 80 of the air vent 78 open. In other words, regardless of the extent of the bend to accommodate different head sizes of users, the elongate body 68 is arranged such that the channel 80 of the air vent 78 allows air to flow therethrough.
[0076] Thus, the air vent 78 is arranged, in certain embodiments, such that the side walls 82 of the channel 80 meet the base 90 of the channel 80 at an angle. In other words, there is a sharp connection as opposed to a rounded connection between the side walls 82 and the base 90. In the embodiment of FIGS. 4A and 4B, the angle between the side walls 82 and the base 90 of the channel 80 in the as-made configuration is about 45 degrees. In further embodiments, the angle between the side walls 82 and the base 90 of the channel 80 in one or more of the as-made and in-use configurations of the face shield 10 may be between about 45 13526786.2 degrees and 90 degrees (Example FIGS 8-10), about 45 degrees and about 80 degrees, about 45 degrees and about 70 degrees, about 45 degrees and about 60 degrees, about 45 degrees and about 50 degrees, about 50 degrees and about 90 degrees, about 50 degrees and about 80 degrees, about 50 degrees and about 70 degrees, about 50 degrees and about 60 degrees, about 60 degrees and about 80 degrees, about 60 degrees and about 70 degrees, about 70 degrees and about 90 degrees, or about 70 degrees and about 80 degrees.
[0077] Each air vent 78 has a air vent depth 94 defined by a distance of the base 90 of the air vent 78 from the inner face 74 of the elongate body 68. In the embodiment of FIG. 4B, the air vent depth 94 is about 2.5 cm. In some embodiments, the air vent depth 94 may be between about 1 cm to about 3.5cm, between about 1.5 cm to about 3.5 cm, between about 2 cm to about 3.5cm, between about 2.5 cm to about 3.5 cm, between about 3.0 cm to about 3.5 cm, between about 1 cm to about 3.0 cm, between about 1.5 cm to about 3.0 cm, between about 2.0 cm to about 3.0 cm, between about 2.5 cm to about 3.0cm, between about 1.0 cm to about 2.5 cm, between about 1.5 cm to about 2.5 cm, or between about 2.0 cm to about 2.5 cm.
[0078] In some embodiments the base 90 of the channel 80 is substantially parallel to the inner side 34 of the sheet 30 of the face portion 12 and has a base width 96 of between about 1.5 cm and 4 cm. In certain embodiments, a minimum base width 96 is defined as that required to maintain the channel 80 open during the in-use configuration and for different extents of bending. A maximum base width 96 is defined, in certain embodiments, as that required to maintain contact of the side walls 82 in the in-use configuration.
In the embodiment of FIG. 4B, the base width 96 is about 2cm. In further embodiments, the base width 96 may be between about 1.5 cm and 3.5 cm, between about 1.5 cm and 3 cm, between about 1.5 cm and 2.5 cm, between about 1.5 cm and 2 cm, between about 2 cm and 2.5 cm, between about 2 cm and 3 cm, between about 2 cm and 3.5 cm, between about 2 cm and 4 cm, between about 2.5 cm and 3 cm, between about 2.5 cm and 3.5 cm, between about 2.5 cm and 4 cm, between about 3 cm and 4 cm, or between about 3.5 cm and 4 cm depending on the number of air vents 78 defined in the elongate body 68.
[0079] The two air vents 78 are spaced from another along the elongate body 68 and are positioned one on either side of a midline 98 of the face shield 10, the midline 98 positioned centrally between the two side edges 42, 44 and extending between the upper end 38 and the 13526786.2 lower end 40 of the sheet 30 (FIGS. 3 and 4A). As seen in FIGS 9-11, the elongate body may define more, or less, than two air vents 78. In embodiments in which there are provided a plurality of air vents 78, a spacing of the air vents 78 from one another may be of equal or unequal distances along the elongate body 68.
[0080] As seen on FIGS 4A, 4B, and 8-11, the elongate body 68 also defines recessed portions 100 on the inner face 74 of the elongate body 68 which are arranged to be spaced from the forehead 22 of the user 16 when in use. The recessed portions 100 are arranged to provide additional channels for airflow and fogging prevention or reduction of the face shield 10. The recessed portions 100 also serve to decrease the contact surface area of the elongate body 68 with the forehead 22 of the user 16, which can help to keep the user cool and comfortable for longer periods of use. Each recessed portion 100 extends from the upper face 70 of the elongate body 68 to the lower face 72 of the elongate body 68.
[0081] As seen in FIGS 4A, 4B and 8-11, each recessed portion 100 has a concave configuration, and extends away from the inner face 74 of the elongate body 68 by a recessed portion depth 101. In certain embodiments, a minimum recessed portion depth is defined as that required to decrease a contact surface area of the elongate body 68 with the forehead 22 of the user 16 in the in-use configuration and for different extents of bend.
In certain embodiments, a maximum recessed portion depth is less than the air vent depth 94. In the embodiment of FIG. 4A and 4C the recessed portion 100 has a depth of about 1 cm. In further embodiments, the recessed portion 100 has a recessed portion depth 101 of between about 0.2 cm to about 1.5 cm , between about 0.4 cm to about 1.5 cm, between about 0.6 cm to about 1.5 cm, between about 0.8 cm to about 1.5 cm, between about 1.0 cm to about 1.5 cm, between about 1.2 cm to about 1.5 cm, between about 0.2 cm to about 1.2 cm, between about 0.4 cm to about 1.2 cm, between about 0.6 cm to about 1.2 cm, between about 0.8 cm to about 1.2 cm, between about 1.0 cm to about 1.2 cm, between about 0.2 cm to about 1.0 cm, between about 0.4 cm to about 1.0 cm, between about 0.6 cm to about 1.0 cm, between about 0.8 cm to about 1.0 cm, between about 0.2 cm to about 0.8 cm, between about 0.4 cm to about 0.8 cm, between about 0.6 cm to about 0.8 cm, between about 0.2 cm to about 0.6 cm, or between about 0.4 cm to about 0.6 cm.
[0082] Furthermore, the concave configuration of the recessed portion 100 also decreases the contact surface area of the elongate body with the forehead by a recessed portion width 104. In the embodiment of FIG. 4C, the recessed portion width 104 is about 3 cm. In further embodiments, the recessed portion width 104 may be between about 1 cm to about 3.5cm, between about 1.5 cm to about 3.5cm, between about 2.0 cm to about 3.5cm, between about 2.5 cm to about 3.5 cm, between about 3.0 cm to about 3.5 cm, between about lcm to about 3.0 cm, between about 1.5 cm to about 3.0 cm, between about 2.0 cm to about 3.0 cm, between about 2.5 cm to about 3.0 cm, between about lcm to about 2.5 cm, between about 1.5 cm to about 2.5 cm, between about 2.0 cm to about 2.5 cm, between about lcm to about 2.0 cm, between about 1.5 cm to about 2.0 cm, or between about lcm to about 1.5 cm.
[0083] As seen in FIGS. 4A and 8, the two recessed portions 100 are spaced outwardly of the at least one air vent 78, in some embodiments. In embodiments in which there are provided a plurality of air vents 78 and recessed portions 100, a spacing of the air vents 78 and recessed portions 100 may be of equal or unequal distances along the elongate body 68.
In other embodiments, there may be less than (not shown) or more than the two recessed portions 100 (FIGS. 9-11).
[0084] Turning now to the head strap portion 24, best seen in FIGS 2, 3, 6 and 7, the head strap portion 24 comprises a strap 106 connecting the two side edges 26 and 28 of the face portion 12. In use, the head strap portion 24 is arranged to extend around the head of the user .. on order to secure the face shield 10 over the face 14 of the user 16. The head strap 106 comprises a resiliently extensible band such as an elastic. In certain embodiments, the head strap 106 is made of a knitted elastic or a woven elastic comprising, for example, polyester, or cotton. The head strap 106 may be latex free. The head strap 106 is configured to fit a wide range of users (in terms of head size) and allows for the user to put on and remove the face shield 10 single-handedly. Furthermore, the head strap 106 has a head strap width 108 arranged to create added comfort and stability of the face shield 10 on the face 14 and head of the user 16 when in use. In the embodiments of FIGS 2, 3, 6 and 7, the head strap width 108 is 25 mm. In further embodiments, the head strap width 108 may be between about 20 mm and about 30 mm, between about 22 mm and about 30 mm, between about 24 mm and about 30 mm, 26 mm and about 30 mm, 28 mm and about 30 mm, between about between about 20 mm and about 28 mm, between about 22 mm and about 28 mm, between about 24 mm and about 28 mm, between about 26 mm and about 28 mm, between about 20 mm and about 26 mm, between about 22 mm and about 26 mm, 22 mm and about 24 mm, 20 mm and about 24 mm, 24 mm and about 26 mm.
13526786.2 [0085] Each end of the head strap portion 24 is attached to the sheet 30 of the face portion 12 by a fastener 110. As seen in FIGS. 2, 3, 6 and 7, the fastener 110 is a clip. For additional comfort to the user 16, the fastener 110 has rounded edges. In other embodiments, the head strap portion 24 is attached to the face portion 14 in any other manner such as using other types of fasteners 110 (e.g. staples, hook and loop, etc.). In yet other embodiments, the head strap 106 is integrally made with the face shield 10 negating the requirement of fasteners. The distance of the fasteners 110 on the face portion 12 is longer than an unstretched configuration of the head strap 106, so that when the head strap portion 24 is stretched, as for example in the in-use configuration of the face shield 10, the face portion 12 and the head band portion 18 are caused to bend.
[0086] Referring now to FIG. 12, there is shown an alternative embodiment of the face shield 10 of Fig. 1, in which there is provided a sweat band 120 on the inner face 74 of the elongate body 68 of the head band portion 18. The sweat band 120 is made of an absorbable material such as a towelling material, or other cotton-based materials. The sweat band 120 is attached to the inner face 74 by adhesive. In other embodiments, the sweat band 120 is attached to the inner face 74 by other means. The sweat band 120 may be removeably attached to the inner face, to allow the user 16 to replace it if needed.
[0087] In use, the face shield 10 is worn by the user 16 by stretching the head strap 106 and positioning the head strap 106 around the head. The face portion 12 is positioned over the face 14 of the user 16 such as to extend from a region above an eyebrow of the user 16 to underneath the chin of the user, covering the anterior neck area. In certain embodiments, the face shield 10 is configured such that a gap between the face shield 10 and the user's chest bone is closed when the head is tilted forward. In certain embodiments, where the face shield 10 comprises a drape portion 50 with the fasteners 66 attached to the inner side 52 of the drape portion 50, the fastener 66 may be closed below the chin of the user 16 such as to reduce the risk of airborne matter coming into contact with the face 14 of the user 16.
[0088] Face shields 10 of the present technology can be stacked and packed together for storage and shipping to the user. In other words, the face shield is configured, in the as-made configuration, to be stackable with other face shields. The face shields 10 may be stored in a substantially flat configuration.
100891 Variations and modifications will occur to those of skill in the art after reviewing this disclosure. The disclosed features may be implemented, in any combination and subcombinations (including multiple dependent combinations and subcombinations), with one or more other features described herein. The various features described or illustrated above, including any components thereof, may be combined or integrated in other systems.
Moreover, certain features may be omitted or not implemented. Examples of changes, substitutions, and alterations are ascertainable by one skilled in the art and could be made without departing from the scope of the information disclosed herein.
100901 It should be appreciated that the invention is not limited to the particular embodiments described and illustrated herein but includes all modifications and variations falling within the scope of the invention as defined in the appended claims.
13526786.2
The fastener elements 66 are positioned at a point below the chin of the user 16 when in use.
When the two fastener elements 66 are attached to one another, an effective width 67 of the drape portion can be reduced. In other words, the fastener 66 may be used to reduce the width 67 of the drape portion 50 beneath the chin of the user 16 and thereby reduce access of airborne contaminants upwardly to the face 14 of the user from between the face shield 10 and the face 14 of the user 16. In some embodiments, the fastener 66 is a hook and loop type fastener. In other embodiments, the fastener 66 is one or more of a snap fastener, a magnetic fastener, a clip, and the like.
13526786.2 [0070] Turning now to the head band portion 18, best seen in FIGS. 3, 4A-4C, 8-11. The head band portion 18 is arranged to provide an additional barrier to the face 14 of the user 16 (e.g. from downwardly moving contaminants) whilst spacing the sheet 30 from the face 14 of the user 16. The head band portion 18 is also arranged for comfort to the user 16. The head band portion 18 is attached to the inner side 34 of the sheet 30 of the face portion 12 and extends at least partially across the upper end 38 of the sheet 30 between the two side edges 42, 44 of the sheet 30. The head band portion 18 comprises an elongate body 68 made of compressible material which has an upper face 70, a lower face 72 (FIG. 3), and an inner face 74, the inner face being arranged to rest against the forehead 22 of the user 16. An outer face of the head band portion 18 is attached to the inner face 34 of the sheet 30.
Attachment may be by adhesive or any other means.
[0071] The elongate body 68 of the head band portion 18 is made of a self-restoring resilient material, such as foam, which molds to the contour of the forehead 22 of the user 16 for a comfortable and secure fit when in use. Generally, in an in-use configuration, the elongate body 68 is more bent than in an as-made configuration. In certain embodiments, the elongate body 68 is made of a hypoallergenic material. The elongate body 68 may also be absorbant, such as for absorbing sweat. In certain embodiments, the elongate body 68 is sterilizable. Examples of suitable materials for the elongate body 68 comprise foams or other configurations of material made of polystyrene, polyurethane, polyvinyl acetal and the like.
The elongate body 68 may be formed by molding, 3D printing, or cutting such as by milling, sawing or using lasers to create a desired shape and configuration of the elongate body 68.
[0072] The elongate body 68 has an elongate body thickness 76 which is arranged to space the face portion 12 of the face shield 10 from the face 14 of the user 16 so as to reduce or minimize the impact of the face shield 10 on breathing and/or vocalization of the user 16. The inner face 74 is spaced from the sheet 30 by the elongate body thickness 76.
Furthermore, the elongate body thickness 76 may be selected so as to accommodate for usage of additional personal protective equipment such as goggles, eye glasses and respirators. In the embodiments of FIGS 3, 4A, 8-11, the elongate body thickness 76 is about 4 cm.
In other embodiments, the elongate body thickness 76 is about 3 cm to about 8 cm, between about 3 cm to about 7 cm, between about 3 cm to about 6 cm, between about 3 cm to about 5 cm, or between about 3 cm to about 4 cm.
13526786.2 [0073] The elongate body 68 defines two air vents 78 extending through the elongate body 68, between the upper face 70 and the lower face 72 of the elongate body 68.
Each of the air vents 78 provides a passage for air to flow, such as warm air upwardly and away from the face 14 of the user 16 in use. This can help to keep the user 16 cool and to prevent fogging of the sheet 30 during use.
[0074] As seen in FIGS 4A and 4B, each air vent 78 comprises a channel 80 formed in the elongate body 68, the channel 80 having two side walls 82, and a base 90. Each channel 80 has an open end 84 at the inner face 74 of the elongate body (FIG. 4B). A
spacing of the side walls at the open end 84 is less than a width of the base 90 of the channel 80. A cross-sectional shape of the channel 80 is triangular, in certain embodiments. Other cross-sectional shapes are also within the scope of the present technology such as trapezoidal, rectangular, square, and diamond (FIGS. 8-10).
[0075] Generally, the face shield 10 is arranged to be bent between an as-made configuration and an in-use configuration. In the as-made configuration, the open end 84 is in an open configuration in which the side walls 82 of the air vent 78 are spaced from one another. In the in-use configuration, the open end 84 is in a closed configuration in which the side walls 82 contact one another at contact regions 92 at the upper portion 86 of the side walls 82. Each channel 80 is sized and shaped such that increasing a curvature in the face shield 10, in the in-use configuration, causes the compressible material of the elongate body 68 to compress the upper portion 86 of the side walls 82 at the contact region 92, whilst maintaining the channel 80 of the air vent 78 open. In other words, regardless of the extent of the bend to accommodate different head sizes of users, the elongate body 68 is arranged such that the channel 80 of the air vent 78 allows air to flow therethrough.
[0076] Thus, the air vent 78 is arranged, in certain embodiments, such that the side walls 82 of the channel 80 meet the base 90 of the channel 80 at an angle. In other words, there is a sharp connection as opposed to a rounded connection between the side walls 82 and the base 90. In the embodiment of FIGS. 4A and 4B, the angle between the side walls 82 and the base 90 of the channel 80 in the as-made configuration is about 45 degrees. In further embodiments, the angle between the side walls 82 and the base 90 of the channel 80 in one or more of the as-made and in-use configurations of the face shield 10 may be between about 45 13526786.2 degrees and 90 degrees (Example FIGS 8-10), about 45 degrees and about 80 degrees, about 45 degrees and about 70 degrees, about 45 degrees and about 60 degrees, about 45 degrees and about 50 degrees, about 50 degrees and about 90 degrees, about 50 degrees and about 80 degrees, about 50 degrees and about 70 degrees, about 50 degrees and about 60 degrees, about 60 degrees and about 80 degrees, about 60 degrees and about 70 degrees, about 70 degrees and about 90 degrees, or about 70 degrees and about 80 degrees.
[0077] Each air vent 78 has a air vent depth 94 defined by a distance of the base 90 of the air vent 78 from the inner face 74 of the elongate body 68. In the embodiment of FIG. 4B, the air vent depth 94 is about 2.5 cm. In some embodiments, the air vent depth 94 may be between about 1 cm to about 3.5cm, between about 1.5 cm to about 3.5 cm, between about 2 cm to about 3.5cm, between about 2.5 cm to about 3.5 cm, between about 3.0 cm to about 3.5 cm, between about 1 cm to about 3.0 cm, between about 1.5 cm to about 3.0 cm, between about 2.0 cm to about 3.0 cm, between about 2.5 cm to about 3.0cm, between about 1.0 cm to about 2.5 cm, between about 1.5 cm to about 2.5 cm, or between about 2.0 cm to about 2.5 cm.
[0078] In some embodiments the base 90 of the channel 80 is substantially parallel to the inner side 34 of the sheet 30 of the face portion 12 and has a base width 96 of between about 1.5 cm and 4 cm. In certain embodiments, a minimum base width 96 is defined as that required to maintain the channel 80 open during the in-use configuration and for different extents of bending. A maximum base width 96 is defined, in certain embodiments, as that required to maintain contact of the side walls 82 in the in-use configuration.
In the embodiment of FIG. 4B, the base width 96 is about 2cm. In further embodiments, the base width 96 may be between about 1.5 cm and 3.5 cm, between about 1.5 cm and 3 cm, between about 1.5 cm and 2.5 cm, between about 1.5 cm and 2 cm, between about 2 cm and 2.5 cm, between about 2 cm and 3 cm, between about 2 cm and 3.5 cm, between about 2 cm and 4 cm, between about 2.5 cm and 3 cm, between about 2.5 cm and 3.5 cm, between about 2.5 cm and 4 cm, between about 3 cm and 4 cm, or between about 3.5 cm and 4 cm depending on the number of air vents 78 defined in the elongate body 68.
[0079] The two air vents 78 are spaced from another along the elongate body 68 and are positioned one on either side of a midline 98 of the face shield 10, the midline 98 positioned centrally between the two side edges 42, 44 and extending between the upper end 38 and the 13526786.2 lower end 40 of the sheet 30 (FIGS. 3 and 4A). As seen in FIGS 9-11, the elongate body may define more, or less, than two air vents 78. In embodiments in which there are provided a plurality of air vents 78, a spacing of the air vents 78 from one another may be of equal or unequal distances along the elongate body 68.
[0080] As seen on FIGS 4A, 4B, and 8-11, the elongate body 68 also defines recessed portions 100 on the inner face 74 of the elongate body 68 which are arranged to be spaced from the forehead 22 of the user 16 when in use. The recessed portions 100 are arranged to provide additional channels for airflow and fogging prevention or reduction of the face shield 10. The recessed portions 100 also serve to decrease the contact surface area of the elongate body 68 with the forehead 22 of the user 16, which can help to keep the user cool and comfortable for longer periods of use. Each recessed portion 100 extends from the upper face 70 of the elongate body 68 to the lower face 72 of the elongate body 68.
[0081] As seen in FIGS 4A, 4B and 8-11, each recessed portion 100 has a concave configuration, and extends away from the inner face 74 of the elongate body 68 by a recessed portion depth 101. In certain embodiments, a minimum recessed portion depth is defined as that required to decrease a contact surface area of the elongate body 68 with the forehead 22 of the user 16 in the in-use configuration and for different extents of bend.
In certain embodiments, a maximum recessed portion depth is less than the air vent depth 94. In the embodiment of FIG. 4A and 4C the recessed portion 100 has a depth of about 1 cm. In further embodiments, the recessed portion 100 has a recessed portion depth 101 of between about 0.2 cm to about 1.5 cm , between about 0.4 cm to about 1.5 cm, between about 0.6 cm to about 1.5 cm, between about 0.8 cm to about 1.5 cm, between about 1.0 cm to about 1.5 cm, between about 1.2 cm to about 1.5 cm, between about 0.2 cm to about 1.2 cm, between about 0.4 cm to about 1.2 cm, between about 0.6 cm to about 1.2 cm, between about 0.8 cm to about 1.2 cm, between about 1.0 cm to about 1.2 cm, between about 0.2 cm to about 1.0 cm, between about 0.4 cm to about 1.0 cm, between about 0.6 cm to about 1.0 cm, between about 0.8 cm to about 1.0 cm, between about 0.2 cm to about 0.8 cm, between about 0.4 cm to about 0.8 cm, between about 0.6 cm to about 0.8 cm, between about 0.2 cm to about 0.6 cm, or between about 0.4 cm to about 0.6 cm.
[0082] Furthermore, the concave configuration of the recessed portion 100 also decreases the contact surface area of the elongate body with the forehead by a recessed portion width 104. In the embodiment of FIG. 4C, the recessed portion width 104 is about 3 cm. In further embodiments, the recessed portion width 104 may be between about 1 cm to about 3.5cm, between about 1.5 cm to about 3.5cm, between about 2.0 cm to about 3.5cm, between about 2.5 cm to about 3.5 cm, between about 3.0 cm to about 3.5 cm, between about lcm to about 3.0 cm, between about 1.5 cm to about 3.0 cm, between about 2.0 cm to about 3.0 cm, between about 2.5 cm to about 3.0 cm, between about lcm to about 2.5 cm, between about 1.5 cm to about 2.5 cm, between about 2.0 cm to about 2.5 cm, between about lcm to about 2.0 cm, between about 1.5 cm to about 2.0 cm, or between about lcm to about 1.5 cm.
[0083] As seen in FIGS. 4A and 8, the two recessed portions 100 are spaced outwardly of the at least one air vent 78, in some embodiments. In embodiments in which there are provided a plurality of air vents 78 and recessed portions 100, a spacing of the air vents 78 and recessed portions 100 may be of equal or unequal distances along the elongate body 68.
In other embodiments, there may be less than (not shown) or more than the two recessed portions 100 (FIGS. 9-11).
[0084] Turning now to the head strap portion 24, best seen in FIGS 2, 3, 6 and 7, the head strap portion 24 comprises a strap 106 connecting the two side edges 26 and 28 of the face portion 12. In use, the head strap portion 24 is arranged to extend around the head of the user .. on order to secure the face shield 10 over the face 14 of the user 16. The head strap 106 comprises a resiliently extensible band such as an elastic. In certain embodiments, the head strap 106 is made of a knitted elastic or a woven elastic comprising, for example, polyester, or cotton. The head strap 106 may be latex free. The head strap 106 is configured to fit a wide range of users (in terms of head size) and allows for the user to put on and remove the face shield 10 single-handedly. Furthermore, the head strap 106 has a head strap width 108 arranged to create added comfort and stability of the face shield 10 on the face 14 and head of the user 16 when in use. In the embodiments of FIGS 2, 3, 6 and 7, the head strap width 108 is 25 mm. In further embodiments, the head strap width 108 may be between about 20 mm and about 30 mm, between about 22 mm and about 30 mm, between about 24 mm and about 30 mm, 26 mm and about 30 mm, 28 mm and about 30 mm, between about between about 20 mm and about 28 mm, between about 22 mm and about 28 mm, between about 24 mm and about 28 mm, between about 26 mm and about 28 mm, between about 20 mm and about 26 mm, between about 22 mm and about 26 mm, 22 mm and about 24 mm, 20 mm and about 24 mm, 24 mm and about 26 mm.
13526786.2 [0085] Each end of the head strap portion 24 is attached to the sheet 30 of the face portion 12 by a fastener 110. As seen in FIGS. 2, 3, 6 and 7, the fastener 110 is a clip. For additional comfort to the user 16, the fastener 110 has rounded edges. In other embodiments, the head strap portion 24 is attached to the face portion 14 in any other manner such as using other types of fasteners 110 (e.g. staples, hook and loop, etc.). In yet other embodiments, the head strap 106 is integrally made with the face shield 10 negating the requirement of fasteners. The distance of the fasteners 110 on the face portion 12 is longer than an unstretched configuration of the head strap 106, so that when the head strap portion 24 is stretched, as for example in the in-use configuration of the face shield 10, the face portion 12 and the head band portion 18 are caused to bend.
[0086] Referring now to FIG. 12, there is shown an alternative embodiment of the face shield 10 of Fig. 1, in which there is provided a sweat band 120 on the inner face 74 of the elongate body 68 of the head band portion 18. The sweat band 120 is made of an absorbable material such as a towelling material, or other cotton-based materials. The sweat band 120 is attached to the inner face 74 by adhesive. In other embodiments, the sweat band 120 is attached to the inner face 74 by other means. The sweat band 120 may be removeably attached to the inner face, to allow the user 16 to replace it if needed.
[0087] In use, the face shield 10 is worn by the user 16 by stretching the head strap 106 and positioning the head strap 106 around the head. The face portion 12 is positioned over the face 14 of the user 16 such as to extend from a region above an eyebrow of the user 16 to underneath the chin of the user, covering the anterior neck area. In certain embodiments, the face shield 10 is configured such that a gap between the face shield 10 and the user's chest bone is closed when the head is tilted forward. In certain embodiments, where the face shield 10 comprises a drape portion 50 with the fasteners 66 attached to the inner side 52 of the drape portion 50, the fastener 66 may be closed below the chin of the user 16 such as to reduce the risk of airborne matter coming into contact with the face 14 of the user 16.
[0088] Face shields 10 of the present technology can be stacked and packed together for storage and shipping to the user. In other words, the face shield is configured, in the as-made configuration, to be stackable with other face shields. The face shields 10 may be stored in a substantially flat configuration.
100891 Variations and modifications will occur to those of skill in the art after reviewing this disclosure. The disclosed features may be implemented, in any combination and subcombinations (including multiple dependent combinations and subcombinations), with one or more other features described herein. The various features described or illustrated above, including any components thereof, may be combined or integrated in other systems.
Moreover, certain features may be omitted or not implemented. Examples of changes, substitutions, and alterations are ascertainable by one skilled in the art and could be made without departing from the scope of the information disclosed herein.
100901 It should be appreciated that the invention is not limited to the particular embodiments described and illustrated herein but includes all modifications and variations falling within the scope of the invention as defined in the appended claims.
13526786.2
Claims (30)
1. A face shield comprising:
- a face portion, the face portion comprising a sheet having a transparent viewing area, the sheet having an inner side, an upper end, a lower end and two side edges;
- a head band portion attached to the inner side of the sheet of the face portion and extending at least partially across the upper end of the sheet between the two side edges of the sheet, the head band portion comprising an elongate body made of a compressible material and having an inner face arranged to rest against a forehead of a user, the elongate body defining:
- at least one air vent extending from an upper face of the elongate body to a lower face of the elongate body;
- at least one recessed portion on the inner face of the elongate body which is arranged to be spaced from the user's forehead in use; and - a head strap portion, the head strap portion comprising a strap extending between the two side edges of the face portion.
- a face portion, the face portion comprising a sheet having a transparent viewing area, the sheet having an inner side, an upper end, a lower end and two side edges;
- a head band portion attached to the inner side of the sheet of the face portion and extending at least partially across the upper end of the sheet between the two side edges of the sheet, the head band portion comprising an elongate body made of a compressible material and having an inner face arranged to rest against a forehead of a user, the elongate body defining:
- at least one air vent extending from an upper face of the elongate body to a lower face of the elongate body;
- at least one recessed portion on the inner face of the elongate body which is arranged to be spaced from the user's forehead in use; and - a head strap portion, the head strap portion comprising a strap extending between the two side edges of the face portion.
2. A face shield comprising:
- a face portion, the face portion comprising a sheet having a transparent viewing area, the sheet having an inner side, an upper end, a lower end and two side edges;
- a head band head portion attached to the inner side of the sheet of the face portion and extending at least partially across the upper end of the sheet between the two side edges of the sheet, the head band portion comprising an elongate body made of a compressible material and having an inner face arranged to rest against a forehead of a user in use, the elongate body defining:
- at least one air vent extending from an upper face of the elongate body to a lower face of the elongate body, the at least one air vent comprising a channel having side walls and an open end at the inner face, an upper portion of the side walls proximate the inner face being spaced closer together than a lower portion of the side walls proximate a base of the channel;
- a head strap portion, the head strap portion comprising a strap extending between the two side edges of the face portion.
- a face portion, the face portion comprising a sheet having a transparent viewing area, the sheet having an inner side, an upper end, a lower end and two side edges;
- a head band head portion attached to the inner side of the sheet of the face portion and extending at least partially across the upper end of the sheet between the two side edges of the sheet, the head band portion comprising an elongate body made of a compressible material and having an inner face arranged to rest against a forehead of a user in use, the elongate body defining:
- at least one air vent extending from an upper face of the elongate body to a lower face of the elongate body, the at least one air vent comprising a channel having side walls and an open end at the inner face, an upper portion of the side walls proximate the inner face being spaced closer together than a lower portion of the side walls proximate a base of the channel;
- a head strap portion, the head strap portion comprising a strap extending between the two side edges of the face portion.
3. The face shield of claim 1, wherein the at least one air vent comprises a channel having side walls and an open end at the inner face, an upper portion of the side walls proximate the inner face being spaced closer together than a lower portion of the side walls proximate a base of the channel
4. The face shield of claim 2, further comprising at least one recessed portion defined on the inner face of the elongate body which is arranged to be spaced from the user's forehead in use.
5. The face shield of any one of claims 1, 3 and 4, wherein the at least one recessed portion extends from the upper face of the elongate body to the lower face of the elongate body.
6. The face shield of claim 5, wherein the at least one recessed portion has a concave configuration.
7. The face shield of any one of claims 1, 3-6, wherein the at least one recessed portion comprises two recessed portions, each of the two recessed portions spaced outwardly of the at least one air vent.
8. The face shield of any one of claims 1, 3-7, wherein the at least one recessed portion extends away from the inner face of the elongate body by a recessed portion depth, and the at least one air vent extends away from the inner face of the elongate body by a air vent depth, the recessed portion depth being less than the air vent depth.
9. The face shield of any one of claims 1-8, wherein the at least one air vent comprises two air vents defined in the elongate body and spaced from another along the elongate body.
10. The face shield of claim 9, wherein each air vent is positioned one on either side of a midline of the face shield, the midline positioned centrally between the two side edges and extending from the upper end to the lower end of the sheet.
11. The face shield of any one of claims 2-10, wherein the base of the channel is substantially parallel to the inner side of the sheet of the face portion.
12. The face shield of any one of claims 2-11, wherein the air vent is arranged such that the side walls of the channel meet the base of the channel at an angle.
13. The face shield of any one of claims 2-12, wherein the face shield is arranged to be bent between an as-made configuration and an in-use configuration, wherein:
- in the as-made configuration: the side walls of the channel are spaced from one another, and - in the in-use configuration: the side walls of the channel contact one another at contact regions at the upper portion of the side walls.
- in the as-made configuration: the side walls of the channel are spaced from one another, and - in the in-use configuration: the side walls of the channel contact one another at contact regions at the upper portion of the side walls.
14. The face shield of claim 13 when dependent on claim 12, the angle between the side walls and the base of the channel in one or more of the as-made configuration and the in-use configuration is about 45-90 degrees, about 45-80 degrees, 45-70 degrees, 45-60 degrees, 45-50 degrees, or about 45 degrees.
15. The face shield of claim 13 or claim 14, wherein the channel is sized and shaped such that increasing a magnitude of the bend causes the compressible material to compress at the contact region whilst maintaining the air vent open.
16. The face shield of any one of claims 1-15, wherein the compressible material is a self-restoring foam.
17. The face shield of any one of claims 1-16, wherein a thickness of the elongate body is about 4 cm.
18. The face shield of any one of claims 1-17, wherein the transparent viewing area is substantially flat.
19. The face shield of any one of claims 1-18, wherein the strap comprises a resiliently extensible band.
20. The face shield of claim 19, wherein the strap has a width of between about 20 mm and about 30 mm.
21. The face shield of any one of claims 1-20, wherein the head strap portion comprises clips for attaching the strap to the face portion.
22. The face shield of claim 21, wherein a distance between the clips is longer than an unstretched configuration of the strap.
23. The face shield of any one of claims 1-22, further comprising a drape portion attachable to the lower end of the sheet of the face portion, wherein the drape portion is arranged to extend a length of the face shield.
24. The face shield of claim 23, wherein the drape portion includes fasteners on a lower portion of the drape portion for reducing a width of the drape portion.
25. The face shield of claim 24, wherein the fasteners are a hook and loop type fastener.
26. The face shield of any one of claims 23-25, wherein the drape portion comprises a non-woven impermeable material.
27. The face shield of any one of claims 1-25, wherein the face portion is made of a material selected from: PVC, PET, PETG, OPS, polycarbonate and APET.
28. The face shield of any one of claims 1-27, wherein the face shield is latex free.
29. The face shield of any one of claims 1-28, further comprising a sweat band attachable to the inner face of the elongate body.
30. A face shield comprising:
- a face portion, the face portion comprising a sheet having a transparent viewing area, the .. sheet having an inner side, an upper end, a lower end and two side edges;
- a drape portion attachable to the lower end of the sheet of the face portion, wherein the drape portion is arranged to extend a length of the face shield.
- a head band portion attached to the inner side of the sheet of the face portion and extending at least partially across the upper end of the sheet between the two side edges of the sheet, the head band portion comprising an elongate body made of a compressible material and having an inner face arranged to rest against a forehead of a user, the elongate body defining:
- at least one air vent extending from an upper face of the elongate body to a lower face of the elongate body;
- at least one recessed portion on the inner face of the elongate body which is arranged to be spaced from the user's forehead in use; and - a head strap portion, the head strap portion comprising a strap extending between the two side edges of the face portion.
- a face portion, the face portion comprising a sheet having a transparent viewing area, the .. sheet having an inner side, an upper end, a lower end and two side edges;
- a drape portion attachable to the lower end of the sheet of the face portion, wherein the drape portion is arranged to extend a length of the face shield.
- a head band portion attached to the inner side of the sheet of the face portion and extending at least partially across the upper end of the sheet between the two side edges of the sheet, the head band portion comprising an elongate body made of a compressible material and having an inner face arranged to rest against a forehead of a user, the elongate body defining:
- at least one air vent extending from an upper face of the elongate body to a lower face of the elongate body;
- at least one recessed portion on the inner face of the elongate body which is arranged to be spaced from the user's forehead in use; and - a head strap portion, the head strap portion comprising a strap extending between the two side edges of the face portion.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA3065616A CA3065616A1 (en) | 2019-12-19 | 2019-12-19 | A face shield with adjustable head band and air ventilation |
| GB2020288.3A GB2591870A (en) | 2019-12-19 | 2020-12-21 | Face shields |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA3065616A CA3065616A1 (en) | 2019-12-19 | 2019-12-19 | A face shield with adjustable head band and air ventilation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3065616A1 true CA3065616A1 (en) | 2021-06-19 |
Family
ID=74221182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3065616A Pending CA3065616A1 (en) | 2019-12-19 | 2019-12-19 | A face shield with adjustable head band and air ventilation |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA3065616A1 (en) |
| GB (1) | GB2591870A (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5732410A (en) * | 1996-10-24 | 1998-03-31 | Machson; Roger | Face shield having closeable drape |
| US7725949B2 (en) * | 2004-04-07 | 2010-06-01 | Op-D-Op, Inc. | Ventilated face shield assembly with glare shield |
| WO2014189364A1 (en) * | 2013-05-24 | 2014-11-27 | Lica Holding B.V. | Disposable surgical face shield |
| US9532617B2 (en) * | 2014-02-21 | 2017-01-03 | Tidi Products, Llc | Disposable face shield |
-
2019
- 2019-12-19 CA CA3065616A patent/CA3065616A1/en active Pending
-
2020
- 2020-12-21 GB GB2020288.3A patent/GB2591870A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB202020288D0 (en) | 2021-02-03 |
| GB2591870A (en) | 2021-08-11 |
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