US4476624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making spirally wound cells
Assignee: Duracell Inc USA
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Filing: 1982-02-24
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Granted: 1984-10-16
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Expires: 2002-02-24
Abstract
Abstract A method for making spirally wound cells using a deformed metal strip mandrel with an electrode being forced therein by a compressing element fixedly retained by the mandrel to hold the electrode during winding. The electrode is electrically connected to the mandrel by the compressing force.
Inventors
- 👤 Gerhart Klein
- 👤 Michael J. Mitchell, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:54
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M6/10; H01M6/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/49112; Y10T29/49826; Y10T29/49881
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
111 words
A method of making a spirally wound cell comprising winding anode electrode members of said cell around a mandrel and retaining said mandrel within said cell characterized in that said method comprises the step of fixedly positioning a portion of an anode of said cell, which is enclosed between separating elements, between said mandrel and a compression element whereby said portion of an anode is compressively retained therebetween during said winding and wherein the separating element, between the anode and the mandrel, has an aperture therein whereby the fixed positioning of said portion of an anode with said compression element simultaneously electrically connects the anode to said mandrel through said aperture.
Claim 2
Independent Claim
111 words
A method of making a spirally wound cell comprising winding anode electrode members of said cell around a mandrel and retaining said mandrel within said cell characterized in that said method comprises the step of fixedly positioning a portion of an anode of said cell, which is enclosed between separating elements, between said mandrel and a compression element whereby said portion of an anode is compressively retained therebetween during said winding and wherein the separating element, between the anode and the mandrel, has an aperture therein whereby the fixed positioning of said portion of an anode with said compression element simultaneously electrically connects the anode to said mandrel through said aperture.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein said compression element fits within said mandrel and is fixedly retained therewithin.
Claim 4
Dependent Claim
39 words
The method of claim 1 wherein said mandrel is inserted within a portion of the container of said cell sized to frictionally fit therewith whereby electrical connection from said anode to said portion of the container is effected thereby.
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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |