US4254191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing battery vents and vented batteries
Assignee: Polaroid Corp
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Filing: 1977-11-18
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Granted: 1981-03-03
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Expires: 1997-11-18
Abstract
Abstract A vent for thin, flat laminar batteries comprising a paper strip enclosed along its length by a gas-permeable, liquid impermeable thermoplastic composition. One or more of the vents can be incorporated into a frame structure which also serves to provide internal and external sealing. For this purpose, the vents are sealed to frames comprising closed loops of thermoplastic material, dimensioned to correspond to the external and internal dimensions of the battery. Methods of making vents comprising the steps of laminating paper with a thermoplastic material and forming the laminate into thermoplastic tubes filled with a paper core.
Inventors
- 👤 Alfredo G. Kniazzeh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:25
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/30; H01M50/394; H01M6/00; H01M6/04; H01M6/06; H01M6/12; H01M6/42; H01M6/46; H01M6/48; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056; Y10T156/1057; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/4911; Y10T29/49114
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
144 words
A flat laminar battery comprising a contiguous stack of laminar cells electrically connected in series by conductive plastic intercell connectors and terminated by conductive plastic current collectors; said battery further comprising thermoplastic frames of liquid impermeable, gas permeable material, said frames being formed with central openings to receive active components of said cells; said frames being located between and separating said intercell connectors and said current collectors; said frames, said intercell connectors and said current collectors being sealed together at their outer peripheries only to provide a liquid impervious enclosure for said cells; and at least one elongated strip of paper embedded in one of said frames and entirely surrounded along its length by liquid impermeable, gas permeable material, said strip extending along a region within said sealed outer periphery through said sealed outer periphery to at least one end exposed to the atmosphere.
Claim 2
Dependent Claim
144 words
A flat laminar battery comprising a contiguous stack of laminar cells electrically connected in series by conductive plastic intercell connectors and terminated by conductive plastic current collectors; said battery further comprising thermoplastic frames of liquid impermeable, gas permeable material, said frames being formed with central openings to receive active components of said cells; said frames being located between and separating said intercell connectors and said current collectors; said frames, said intercell connectors and said current collectors being sealed together at their outer peripheries only to provide a liquid impervious enclosure for said cells; and at least one elongated strip of paper embedded in one of said frames and entirely surrounded along its length by liquid impermeable, gas permeable material, said strip extending along a region within said sealed outer periphery through said sealed outer periphery to at least one end exposed to the atmosphere.
Claim 3
Dependent Claim
147 words
In the method of making a vented laminar battery of the type comprising laminar cells chemically isolated and electrically connected in series by conductive plastic intercell connectors and terminated by conductive plastic current collectors laminated to thin metal external terminal sheets, in which the intercell connectors and current collectors are interdigitated with thermoplastic frames formed with central openings to receive wet active cell components, the steps of embedding at least one strip of paper in at least one of said frames between said opening and one edge of said frame with at least one end of said strip exposed, and sealing said cells by heating the edges of said frames outside of said strip except at the ends of said strip such that the major portion of the length of said strip is inside of the seal but embedded in a liquid-impermeable, gas-permeable matrix of thermoplastic material.
Claim 4
Dependent Claim
147 words
In the method of making a vented laminar battery of the type comprising laminar cells chemically isolated and electrically connected in series by conductive plastic intercell connectors and terminated by conductive plastic current collectors laminated to thin metal external terminal sheets, in which the intercell connectors and current collectors are interdigitated with thermoplastic frames formed with central openings to receive wet active cell components, the steps of embedding at least one strip of paper in at least one of said frames between said opening and one edge of said frame with at least one end of said strip exposed, and sealing said cells by heating the edges of said frames outside of said strip except at the ends of said strip such that the major portion of the length of said strip is inside of the seal but embedded in a liquid-impermeable, gas-permeable matrix of thermoplastic material.
Claim 5
Dependent Claim
53 words
The method of claim 2, further comprising the preliminary step of encasing said strip in a tube of gas-permeable, liquid-impermeable material, and in which said step of embedding said strip in said frame is carried out by laminating said strip between two laminar elements of said frame to form an integral vented frame.
Claim 6
Dependent Claim
13 words
The method of claim 2, in which said cells are sealed under vacuum.
Claim 7
Dependent Claim
34 words
The method of claim 4, in which pressure is applied at least to the edges of the battery while heating, and in which said vacuum is established before said heat and pressure are applied.
Claim 8
Dependent Claim
13 words
The method of claim 3, in which said cells are sealed under vacuum.
Claim 9
Dependent Claim
34 words
The method of claim 6, in which pressure is applied at least to the edges of the battery while heating, and in which said vacuum is established before said heat and pressure are applied.
Claim 10
Dependent Claim
151 words
In the method of making a vented laminar battery of the type comprising laminar cells chemically isolated and electrically connected in series by conductive plastic intercell connectors and terminated by conductive plastic current collectors laminated to thin metal external terminal sheets, in which the intercell connectors and current collectors are interdigitated with thermoplastic frames formed with central openings to receive wet active cell components, the steps of embedding at least one strip of paper in a liquid-impermeable, gas-permeable matrix of thermoplastic material in said battery between said openings and the edges of said frames with at least one end of said strip exposed, and sealing said cells by heating the edges of said frames outside of said strip except at the ends of said strip such that the major portion of the length of said strip is inside of the seal but embedded in a liquid-impermeable, gas-permeable matrix of thermoplastic material.
Claim 11
Dependent Claim
151 words
In the method of making a vented laminar battery of the type comprising laminar cells chemically isolated and electrically connected in series by conductive plastic intercell connectors and terminated by conductive plastic current collectors laminated to thin metal external terminal sheets, in which the intercell connectors and current collectors are interdigitated with thermoplastic frames formed with central openings to receive wet active cell components, the steps of embedding at least one strip of paper in a liquid-impermeable, gas-permeable matrix of thermoplastic material in said battery between said openings and the edges of said frames with at least one end of said strip exposed, and sealing said cells by heating the edges of said frames outside of said strip except at the ends of said strip such that the major portion of the length of said strip is inside of the seal but embedded in a liquid-impermeable, gas-permeable matrix of thermoplastic material.
Claim 12
Dependent Claim
53 words
The method of claim 8, further comprising the preliminary step of encasing said strip in a tube of gas-permeable, liquid-impermeable material, and in which said step of embedding said strip in said frame is carried out by laminating said strip between two laminar elements of said frame to form an integral vented frame.
Claim 13
Dependent Claim
13 words
The method of claim 8, in which said cells are sealed under vacuum.
Claim 14
Dependent Claim
34 words
The method of claim 8, in which pressure is applied at least to the edges of the battery while heating, and in which said vacuum is established before said heat and pressure are applied.
Claim 15
Dependent Claim
133 words
A flat laminar battery comprising a contiguous stack of laminar cells electrically connected in series by conductive plastic intercell connectors and terminated by conductive plastic current collectors; said battery further comprising thermoplastic frames of liquid impermeable, gas permeable material, said frames being formed with central openings to receive active components of said cells; said frames being located between and separating said intercell connectors and said current collectors; said frames and said current collectors being sealed together at their outer peripheries only to provide a liquid impervious enclosure for said cells; and at least one elongated strip of paper extending along a region within said sealed outer periphery through said sealed outer periphery to at least one end exposed to the atmosphere, said strip being surrounded along its length by a liquid impermeable barrier.
Claim 16
Dependent Claim
133 words
A flat laminar battery comprising a contiguous stack of laminar cells electrically connected in series by conductive plastic intercell connectors and terminated by conductive plastic current collectors; said battery further comprising thermoplastic frames of liquid impermeable, gas permeable material, said frames being formed with central openings to receive active components of said cells; said frames being located between and separating said intercell connectors and said current collectors; said frames and said current collectors being sealed together at their outer peripheries only to provide a liquid impervious enclosure for said cells; and at least one elongated strip of paper extending along a region within said sealed outer periphery through said sealed outer periphery to at least one end exposed to the atmosphere, said strip being surrounded along its length by a liquid impermeable barrier.
Claim 17
Dependent Claim
125 words
A flat laminar battery comprising a contiguous stack of laminar cells terminated by conductive plastic current collectors; said battery further comprising thermoplastic frames of liquid impermeable, gas permeable material, said frames being formed with central openings to receive active components of said cells; said frames being located between and separating said current collectors; said frames and said current collectors being sealed together at their outer peripheries only to provide a liquid impervious enclosure for said cells; and at least one elongated strip of paper embedded in one of said frames surrounded along its length by liquid impermeable, gas permeable material, said strip extending along a region within said sealed outer periphery through said sealed outer periphery to at least one end exposed to the atmosphere.
Claim 18
Dependent Claim
125 words
A flat laminar battery comprising a contiguous stack of laminar cells terminated by conductive plastic current collectors; said battery further comprising thermoplastic frames of liquid impermeable, gas permeable material, said frames being formed with central openings to receive active components of said cells; said frames being located between and separating said current collectors; said frames and said current collectors being sealed together at their outer peripheries only to provide a liquid impervious enclosure for said cells; and at least one elongated strip of paper embedded in one of said frames surrounded along its length by liquid impermeable, gas permeable material, said strip extending along a region within said sealed outer periphery through said sealed outer periphery to at least one end exposed to the atmosphere.
References Cited (Backward Citations)
US2632784A
Cited
US2870235A
Cited
US3081371A
Cited
US3353999A
Cited
US3563805A
Cited
US3744358A
Cited
US3647557A
Cited
US3714879A
Cited
US3731608A
Cited
US3933555A
Cited
US3741812A
Cited
US3741813A
Cited
US3750551A
Cited
US3870566A
Cited
US3870237A
Cited
US3907599A
Cited
US4080728A
Cited
US4028479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |