US4589408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical face mask and hood
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1984-08-02
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Granted: 1986-05-20
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Expires: 2004-08-02
Abstract
Abstract A head covering is disclosed having a face mask portion and a rear portion which substantially completely surrounds the head of the wearer and reaches to the neck, where it may be gathered by a length of elastic, and which is formed of a laminated material incorporating, as a layer, a mat of generally discontinuous thermoplastic microfibers and, as a second layer, a web of continuous thermoplastic filaments, the laminated material providing a combination of bacteria barrier and air permeability properties substantially throughout the head covering which is effective for containment of bacteria while retaining air permeability sufficient to allow the wearer to breathe through the material in the face mask portion where the nose and mouth are covered.
Inventors
- 👤 Wayne J. Singer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:26
CPC Classifications
A; A41; A41D; A41D13/00; A41D13/05; A41D13/11; A41D13/1107; A41D13/1153; A42; A42B; A42B1/00; A42B1/04; A42B1/046
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
230 words
A combined surgical face mask and hood comprised of material and forming a head covering adapted to substantially completely surround the head of a wearer except for an opening adapted to lie over the eyes of the wearer and including a face mask portion adapted to cover the mouth and nostrils and provide a filter through which the wearer breaths, said head covering also being adapted to reach to the neck of the wearer, and further including means for holding the head covering on the wearer with said face mask portion against the wearer's face and in position covering the mouth and nostrils, said head covering material being formed of a laminated material including a layer of substantially continuous, randomly deposited, thermoplastic polymer filaments having a diameter greater than about 12 microns and a mat of thermoplastic polymer microfibers having an average diameter of about 2-4 microns, said microfiber mat having a basis weight between about 0.9 ounce/yd 2 and about 1.25 ounce/yd 2 , said layer and mat being intermittently bonded together to provide a laminated material having a basis weight between about 1.3 ounce/yd 2 and about 1.7 ounce/yd 2 , the combination of said mat and said layer being selected to provide substantially throughout said head covering a combination of bacteria biological efficiency BFE≧95% and air permeability of ΔP >5 mm, and textile like drape and hand.
Claim 2
Dependent Claim
230 words
A combined surgical face mask and hood comprised of material and forming a head covering adapted to substantially completely surround the head of a wearer except for an opening adapted to lie over the eyes of the wearer and including a face mask portion adapted to cover the mouth and nostrils and provide a filter through which the wearer breaths, said head covering also being adapted to reach to the neck of the wearer, and further including means for holding the head covering on the wearer with said face mask portion against the wearer's face and in position covering the mouth and nostrils, said head covering material being formed of a laminated material including a layer of substantially continuous, randomly deposited, thermoplastic polymer filaments having a diameter greater than about 12 microns and a mat of thermoplastic polymer microfibers having an average diameter of about 2-4 microns, said microfiber mat having a basis weight between about 0.9 ounce/yd 2 and about 1.25 ounce/yd 2 , said layer and mat being intermittently bonded together to provide a laminated material having a basis weight between about 1.3 ounce/yd 2 and about 1.7 ounce/yd 2 , the combination of said mat and said layer being selected to provide substantially throughout said head covering a combination of bacteria biological efficiency BFE≧95% and air permeability of ΔP >5 mm, and textile like drape and hand.
Claim 3
Dependent Claim
18 words
A surgical face mask and hood combined according to claim 1 whereln said microfibers are composed of polypropylene.
Claim 4
Dependent Claim
21 words
A surgical face mask and hood combined according to claim 1 wherein said microfibers and said filaments are composed of polypropylene.
Claim 5
Dependent Claim
27 words
A surgical face mask and hood combined according to claim 1, said laminated material having a surface resistivity below about 1×10 11 ohms/square unit of applied voltage.
Claim 6
Dependent Claim
213 words
A combined surgical face mask and hood comprised of material and forming a head covering adapted to substantially completely surround the head of a wearer except for an opening adapted to lie over the eyes of the wearer and including a section adapted to cover the mouth and nostrils and provide a filter through which the wearer breaths, said head covering also being adapted to reach to the neck of the wearer, and further including means for holding the head covering on the wearer with said face mask portion against the wearer's face and in position covering the mouth and nostrils, said head covering material being formed of a laminated nonwoven material including a layer of substantially continuous, randomly deposited, thermoplastic polymer filaments and a mat of thermoplastic polymer microfibers having an average diameter less than about ten microns, said microfiber mat having a basis weight between about 0.9 ounce/yd 2 and about 1.25 ounce/yd 2 , said layer and mat being intermittently bonded together to provide a laminated material having a basis weight between about 1.3 ounce/yd 2 and about 1.9 ounce/yd 2 , the combination of said layer and mat being selected to provide substantially throughout said head covering a combination of bacteria biological efficiency BFE≧95% and air permeability ΔP≦5 mm.
Claim 7
Dependent Claim
213 words
A combined surgical face mask and hood comprised of material and forming a head covering adapted to substantially completely surround the head of a wearer except for an opening adapted to lie over the eyes of the wearer and including a section adapted to cover the mouth and nostrils and provide a filter through which the wearer breaths, said head covering also being adapted to reach to the neck of the wearer, and further including means for holding the head covering on the wearer with said face mask portion against the wearer's face and in position covering the mouth and nostrils, said head covering material being formed of a laminated nonwoven material including a layer of substantially continuous, randomly deposited, thermoplastic polymer filaments and a mat of thermoplastic polymer microfibers having an average diameter less than about ten microns, said microfiber mat having a basis weight between about 0.9 ounce/yd 2 and about 1.25 ounce/yd 2 , said layer and mat being intermittently bonded together to provide a laminated material having a basis weight between about 1.3 ounce/yd 2 and about 1.9 ounce/yd 2 , the combination of said layer and mat being selected to provide substantially throughout said head covering a combination of bacteria biological efficiency BFE≧95% and air permeability ΔP≦5 mm.
References Cited (Backward Citations)
US1800051A
Cited
US1990199A
Cited
US2355283A
Cited
US2436249A
Cited
US3058463A
Cited
US3314079A
Cited
US3789839A
Cited
US3955570A
Cited
US4041203A
Cited
US3885558A
Cited
US3943575A
Cited
US4032991A
Cited
US4196245A
Cited
GB2124071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |