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Patent US4169003A successfully refreshed from Google Patents.
US4169003A
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Flat-pack battery separator
Assignee: Fiber Technology Corp
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Filing: 1977-11-17
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Granted: 1979-09-25
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Expires: 1997-11-17
Abstract
Abstract A novel battery separator for a flat-pack or planar battery is disclosed wherein a nonwoven fabric is disposed on and across a plastic frame or grid, the outer edges of the fabric being disposed on said plastic frame are of extremely low fiber density and being oriented predominantly in a direction normal to each side of the frames so as to facilitate the more complete thermal pressurized bonding of a stack of separators and similarly electrodes by a sealing of the outer edges of the respective plastic frames. A more complete seal is thus formed insuring against the leaking or escaping of the liquid electrolyte contained therein.
Inventors
- 👤 Phoenix N. Dangel
- 👤 Preston F. Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:11
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/44; H01M50/411; H01M50/414; H01M50/42; H01M50/463; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
149 words
A method of making battery separators for planar batteries comprising: disposing a hot melt plastic grid on a movable, porous conveyor screen, said grid having a plurality of generally rectangular openings thereon; depositing a fluid-borne stream of textile-length fibers thereon; causing more than 80 percent of the fibers in said stream to locate within said openings in a manner that only fibers lying directly adjacent said grid are oriented substantially parallel with the axis of said grid while the remaining fibers therein are disposed in random orientation therein; simultaneously causing a minority of fibers in said stream to locate on said grid, said minority of fibers being oriented in a direction substantially normal to the axis of said grid; heating said grid with the thusly disposed fibers thereon, so as to anchor said fibers to said grid; and, cutting said grid into individual battery separator units for subsequent usage.
Claim 2
Independent Claim
149 words
A method of making battery separators for planar batteries comprising: disposing a hot melt plastic grid on a movable, porous conveyor screen, said grid having a plurality of generally rectangular openings thereon; depositing a fluid-borne stream of textile-length fibers thereon; causing more than 80 percent of the fibers in said stream to locate within said openings in a manner that only fibers lying directly adjacent said grid are oriented substantially parallel with the axis of said grid while the remaining fibers therein are disposed in random orientation therein; simultaneously causing a minority of fibers in said stream to locate on said grid, said minority of fibers being oriented in a direction substantially normal to the axis of said grid; heating said grid with the thusly disposed fibers thereon, so as to anchor said fibers to said grid; and, cutting said grid into individual battery separator units for subsequent usage.
Claim 3
Dependent Claim
33 words
The method of claim 1 wherein said fluid-borne stream of fibers comprise a blend of thermoplastic and non-thermoplastic fibers, said thermoplastic fibers comprising at least 10% of the total fibers in said stream.
Claim 4
Dependent Claim
30 words
The method of claim 1 wherein said fluid-borne stream of fibers consists of a 50%--50% blend of fibers of a polymer of vinyl acetate and vinyl chloride and acrylic fibers.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |