US3775189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming sealed housings for electrochemical cells
Assignee: Duracell Inc USA
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Filing: 1972-02-25
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Granted: 1973-11-27
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Expires: 1992-02-25
Abstract
Abstract A process for forming an electrochemical cell housing by ultrasonically welding a first housing member to a second housing member to simultaneously form a leakproof support around the edges of the cathode of the cell and a leakproof joint between the battery housing members.
Inventors
- 👤 A Jaggard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:02
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/50; B29C66/51; B29C66/54; B29C65/00; B29C65/02; B29C65/08; B29C66/01; B29C66/32; B29C66/322; B29C66/543; H; H01; H01M; H01M12/00; H01M12/04; H01M12/06; B29C66/70; B29C66/71; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/4911
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
192 words
A method of simultaneously forming a leakproof seam in an electrochemical cell housing and forming a leakproof interface between a hydrophobic electrOde and an electrode supporting surface comprising the steps of: forming a first housing having an electrode supporting surface and a heat sealable surface; forming a second housing having an electrode supporting surface and a heat-sealable surface; positioning a hydrophobic electrode having an area to be sealed against the electrode supporting surface of the first housing; positioning the second housing on the hydrophobic electrode to thereby place the electrode-supporting surface of said second housing against the hydrophobic electrode and the heat-sealable surface of said second housing against the heat-sealable surface of the first housing; compressing the heat-sealable surface of the first housing against the heat-sealable surface of the second housing; fusing the heat-sealable surface of the first housing to the heat-sealable surface of the second housing while compressing the hydrophobic electrode between the electrode-supporting surface of the first housing and the electrode-supporting surface of the second housing to thereby soften at least one of the electrode-support surfaces to thereby produce a leakproof seal between the electrode-support surface and the hydrophobic electrode.
Claim 2
Independent Claim
192 words
A method of simultaneously forming a leakproof seam in an electrochemical cell housing and forming a leakproof interface between a hydrophobic electrOde and an electrode supporting surface comprising the steps of: forming a first housing having an electrode supporting surface and a heat sealable surface; forming a second housing having an electrode supporting surface and a heat-sealable surface; positioning a hydrophobic electrode having an area to be sealed against the electrode supporting surface of the first housing; positioning the second housing on the hydrophobic electrode to thereby place the electrode-supporting surface of said second housing against the hydrophobic electrode and the heat-sealable surface of said second housing against the heat-sealable surface of the first housing; compressing the heat-sealable surface of the first housing against the heat-sealable surface of the second housing; fusing the heat-sealable surface of the first housing to the heat-sealable surface of the second housing while compressing the hydrophobic electrode between the electrode-supporting surface of the first housing and the electrode-supporting surface of the second housing to thereby soften at least one of the electrode-support surfaces to thereby produce a leakproof seal between the electrode-support surface and the hydrophobic electrode.
Claim 3
Dependent Claim
28 words
The method of claim 1 including the step of forming a recess in the electrode supporting surface of one of the housings to accommodate electrodes of different thickness.
Claim 4
Dependent Claim
22 words
The method of claim 1 including the step of forming a melt bead on one of the heat-sealable surfaces of the housing.
Claim 5
Dependent Claim
30 words
The method of claim 3 including the step of forming a recess between the edge of the electrode and the first heat-sealable material to thereby receive excess melted heat-sealable material.
Claim 6
Dependent Claim
23 words
The method of claim 1 including ultrasonically welding the heat-sealable surface of the first housing to the heat-sealable surface of the second housing.
References Cited (Backward Citations)
US3126302A
Cited
US3432358A
Cited
US3660166A
Cited
US3522100A
Cited
US3533845A
Cited
US3598655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |