Patent US3613639A successfully refreshed from Google Patents.
US3613639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Animal cage protective cover and method of making same
Assignee: Appleton Wire Works Corp
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Filing: 1970-02-12
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Granted: 1971-10-19
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Expires: 1990-02-12
Abstract
Abstract A protective cover for an animal cage is formed from a fibrous web material in which is incorporated a barrier media having a thermosetting resin formed into barrier areas in the fibrous web material for reducing the permeability of the fibrous web to a system of tortuous passageways and restricting the flow of air currents therethrough to a value less than that necessary to maintain contaminants airborne, thereby eliminating the transport of such contaminants into or out of such animal cage. The cover may be made by thermoforming the fibrous web into a shape to fit over and seal with the animal cage.
Inventors
- 👤 Charles A Lee
- 👤 Frank D Sorrells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:18
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/02; A01K1/03; A01K1/031
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
117 words
A protective cover for an animal cage comprising a body to fit on said cage, said body including at least one web formed of matted, randomly oriented fibers of at least staple length with interconnecting voids between fibers and having passageways for the passage of air, and a barrier media in said web including a thermosetting resin formed into barrier areas in said web bridging fibers and forming in said web around said fiber tortuous passageways which reduce the transport velocity of air at ambient conditions and change substantially the air permeability of said web to within a predetermined range of air permeabilities so that airborne contaminants will not be borne through said cover by air currents.
Claim 2
Dependent Claim
117 words
A protective cover for an animal cage comprising a body to fit on said cage, said body including at least one web formed of matted, randomly oriented fibers of at least staple length with interconnecting voids between fibers and having passageways for the passage of air, and a barrier media in said web including a thermosetting resin formed into barrier areas in said web bridging fibers and forming in said web around said fiber tortuous passageways which reduce the transport velocity of air at ambient conditions and change substantially the air permeability of said web to within a predetermined range of air permeabilities so that airborne contaminants will not be borne through said cover by air currents.
Claim 3
Dependent Claim
42 words
A cover in accordance with claim 1 in which said barrier media includes a conditioning agent mixed with said thermosetting resin to cause the latter to spreAd laterally between contiguous fibers in said fibrous web and form said barrier areas when polymerized.
Claim 4
Dependent Claim
37 words
A cover in accordance with claim 2 in which said conditioning agent is another thermosetting resin for changing the interfacial characteristics of said first-mentioned thermosetting resin from coating fibers to also bridging between fibers in said web.
Claim 5
Dependent Claim
16 words
A cover in accordance with claim 3 in which said conditioning agent is an acrylic resin.
Claim 6
Dependent Claim
17 words
A cover in accordance with claim 2 in which said conditioning agent is a particulate, inert filler.
Claim 7
Dependent Claim
131 words
A cover for an animal cage comprising a first web formed of matted long, randomly oriented filaments having passageways between filaments for the passage of air, a second web disposed in face-to-face engagement with said first web at an interface and also formed with matted long, randomly oriented filaments having passageways between filaments for the passage of air, and a bonding and barrier media including a thermosetting resin for laminating said webs at said interface, said thermosetting resin being polymerized to form interrupted barrier areas between filaments within the web and on the exterior surfaces of the webs resulting in tortuous passageways for air attempting to pass through the cover so that the transport velocity of air at ambient conditions through the cover is insufficiently to carry contaminants through said cover.
Claim 8
Dependent Claim
131 words
A cover for an animal cage comprising a first web formed of matted long, randomly oriented filaments having passageways between filaments for the passage of air, a second web disposed in face-to-face engagement with said first web at an interface and also formed with matted long, randomly oriented filaments having passageways between filaments for the passage of air, and a bonding and barrier media including a thermosetting resin for laminating said webs at said interface, said thermosetting resin being polymerized to form interrupted barrier areas between filaments within the web and on the exterior surfaces of the webs resulting in tortuous passageways for air attempting to pass through the cover so that the transport velocity of air at ambient conditions through the cover is insufficiently to carry contaminants through said cover.
Claim 9
Dependent Claim
31 words
A cover in accordance with claim 6 in which said bonding and barrier media includes a conditioning agent for assisting said thermosetting resin in spreading to block passageways in said webs.
Claim 10
Independent Claim
81 words
A method of making a protective cover comprising the steps of providing a fibrous sheet having a plurality of passageways therein, thermoforming said fibrous sheet to a predetermined shape, applying a liquid barrier media to said thermoformed sheet and polymerizing said barrier media to form barrier areas between filaments within the web and forming tortuous passageways so that the air permeability of the web is reduced to where the transport velocity of air is insufficient to carry contaminants through said cover.
Claim 11
Independent Claim
81 words
A method of making a protective cover comprising the steps of providing a fibrous sheet having a plurality of passageways therein, thermoforming said fibrous sheet to a predetermined shape, applying a liquid barrier media to said thermoformed sheet and polymerizing said barrier media to form barrier areas between filaments within the web and forming tortuous passageways so that the air permeability of the web is reduced to where the transport velocity of air is insufficient to carry contaminants through said cover.
Claim 12
Dependent Claim
131 words
A cover for an animal cage comprising a first web formed of matted, long, randomly oriented filaments having multitudinous filaments crossings and passageways between filaments for the passage of air, a second web disposed in face-to-face engagement with said first web at an interface and also formed with matted, long, randomly oriented filaments having multitudinous filament crossings and passageways between filaments for the passage of air, and a bonding and barrier media including a thermosetting resin for laminating said webs at said interface, said thermosetting resin being polymerized to form nodular formations at said filament crossings in the respective webs, said nodular formations constituting baffles for air attempting to pass through the cover to cause the air to deflect and to change direction thereby limiting the transport velocity of airborne contaminants.
Claim 13
Dependent Claim
131 words
A cover for an animal cage comprising a first web formed of matted, long, randomly oriented filaments having multitudinous filaments crossings and passageways between filaments for the passage of air, a second web disposed in face-to-face engagement with said first web at an interface and also formed with matted, long, randomly oriented filaments having multitudinous filament crossings and passageways between filaments for the passage of air, and a bonding and barrier media including a thermosetting resin for laminating said webs at said interface, said thermosetting resin being polymerized to form nodular formations at said filament crossings in the respective webs, said nodular formations constituting baffles for air attempting to pass through the cover to cause the air to deflect and to change direction thereby limiting the transport velocity of airborne contaminants.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |