US3901960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing battery plate grids
Assignee: ZF International UK Ltd
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Filing: 1972-11-09
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Granted: 1975-08-26
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Expires: 1992-11-09
Abstract
Abstract A method of manufacturing a battery plate grid includes the steps of applying a layer of conductive material onto a mould, inserting a conductive battery plate lug having an extension integral therewith into the mould, filling the remainder of the mould with particles of a sinterable, thermo-plastic synthetic resin material, heating the synthetic resin material until the resin is fully sintered, the extension of the lug thereby being trapped by the sintered resin and the conductive material from the mould thereby becoming firmly adhered to the lower surface of the sintered resin as a continuous, conducting layer, cooling the sintered resin until it hardens, and then removing the resultant grid from the mould.
Inventors
- 👤 Frank Raymond Holloway
- 👤 James Michael Farley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:42
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/82; H01M4/84; B; B29; B29C; B29C70/00; B29C70/68; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/49114; Y10T29/49115
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
168 words
A METHOD OF MANUFACTURING A BATTERY PLATE GRID COMPRISING: A. APPLYING A LAYER OF GRAPHITE HAVING A PARTICLE SIZE IN THE RANGE OF 2 TO 20 MICRONS ONTO THE SURFACE OF A MOLD, B. PLACING A CONDUCTIVE BATTERY PLATE LUG HAVING AN INTEGRAL EXTENSION INTO SAID MOLD, THE LUG MAKING ELECTRICAL CONTACT WITH SAID GRAPHITE, C. INTRODUCING SINTERABLE PARTICULATE THERMOPLASTIC SYNTHETIC RESIN OVER SAID LAYER OF GRAPHITE, THE RESIN COVERING SAID EXTENSION, D. HEATING SAID RESIN IN SAID MOLD AT A TEMPERATURE SUFFICENT TO SINTER SAID RESIN AND TRAP SAID EXTENSION WITHIN THE SINTERED RESIN, THE HEATING BEING CONTINUED UNTIL THE RESIN IS FULLY SINTERED INTO A SUBSTANTIALLY NON-POROUS MASS AND THE GRAPHITE IS FIRMLY ADHERED TO THE SURFACE OF SAID MASS PRESENTED TO THE MOLD AS A CONTONUOUS CONDUCTING LAYER, E. COOLING SAID MASS IN SAID MOLD UNTIL THE RESIN HARDENS, AND F. REMOVING THE BATTERY PLATE GRID FROM THE MOLD, SAID GRAPHITE ACTING AS A RELEASE AGENT TO PREVENT THE GRID FROM STICKING TO THE MOLD.
Claim 2
Independent Claim
168 words
A METHOD OF MANUFACTURING A BATTERY PLATE GRID COMPRISING: A. APPLYING A LAYER OF GRAPHITE HAVING A PARTICLE SIZE IN THE RANGE OF 2 TO 20 MICRONS ONTO THE SURFACE OF A MOLD, B. PLACING A CONDUCTIVE BATTERY PLATE LUG HAVING AN INTEGRAL EXTENSION INTO SAID MOLD, THE LUG MAKING ELECTRICAL CONTACT WITH SAID GRAPHITE, C. INTRODUCING SINTERABLE PARTICULATE THERMOPLASTIC SYNTHETIC RESIN OVER SAID LAYER OF GRAPHITE, THE RESIN COVERING SAID EXTENSION, D. HEATING SAID RESIN IN SAID MOLD AT A TEMPERATURE SUFFICENT TO SINTER SAID RESIN AND TRAP SAID EXTENSION WITHIN THE SINTERED RESIN, THE HEATING BEING CONTINUED UNTIL THE RESIN IS FULLY SINTERED INTO A SUBSTANTIALLY NON-POROUS MASS AND THE GRAPHITE IS FIRMLY ADHERED TO THE SURFACE OF SAID MASS PRESENTED TO THE MOLD AS A CONTONUOUS CONDUCTING LAYER, E. COOLING SAID MASS IN SAID MOLD UNTIL THE RESIN HARDENS, AND F. REMOVING THE BATTERY PLATE GRID FROM THE MOLD, SAID GRAPHITE ACTING AS A RELEASE AGENT TO PREVENT THE GRID FROM STICKING TO THE MOLD.
Claim 3
Dependent Claim
34 words
The method of claim 1, further including, between steps (d) and (e), the step of applying a layer of particulate conductive material to the surface of the grid not in contact with the mold.
Claim 4
Dependent Claim
27 words
The method of claim 1, wherein the sinterable thermoplastic synthetic resin material is selected from the group consisting of polyvinyl chloride, polyvinyl chloride copolymers, polypropylene and polycarbonates.
Claim 5
Dependent Claim
20 words
The method of claim 1, wherein the sinterable thermoplastic synthetic resin material has a particle size less than 250 microns.
Claim 6
Dependent Claim
38 words
The method of claim 1, wherein step (a) is performed by preheating said mold and spraying a water dispersion of said graphite onto said surface of said mold, whereby the water is evaporated leaving said layer of graphite.
Claim 7
Independent Claim
183 words
The method of manufacturing a battery plate grid comprising: a. applying a release agent to the surface of a mold; b. applying a layer of electrically conductive particulate material having a particle size in the range of 2 to 20 microns over the release agent on the surface of the mold; c. placing a conductive battery place lug having an integral exTension into said mold, the lug making electrical contact with said conductive material; d. introducing sinterable particulate thermoplastic synthetic resin over said layer of conductive material, the resin covering said extension; e. heating said resin in said mold at a temperature sufficient to sinter said resin and trap said extension within the resin, the heating being continued until the resin is fully sintered into a substantially non-porous mass and the conductive material is firmly adhered to the surface of said mass presented to the mold as a continuous conducting layer; f. cooling said mass in said mold until the resin hardens; and g. removing the battery plate grid from the mold, said release agent preventing the grid from sticking to the mold.
Claim 8
Independent Claim
183 words
The method of manufacturing a battery plate grid comprising: a. applying a release agent to the surface of a mold; b. applying a layer of electrically conductive particulate material having a particle size in the range of 2 to 20 microns over the release agent on the surface of the mold; c. placing a conductive battery place lug having an integral exTension into said mold, the lug making electrical contact with said conductive material; d. introducing sinterable particulate thermoplastic synthetic resin over said layer of conductive material, the resin covering said extension; e. heating said resin in said mold at a temperature sufficient to sinter said resin and trap said extension within the resin, the heating being continued until the resin is fully sintered into a substantially non-porous mass and the conductive material is firmly adhered to the surface of said mass presented to the mold as a continuous conducting layer; f. cooling said mass in said mold until the resin hardens; and g. removing the battery plate grid from the mold, said release agent preventing the grid from sticking to the mold.
Claim 9
Dependent Claim
20 words
The method of claim 6, wherein the conductive material is selected from the group consisting of silver, zinc, and tin.
Claim 10
Dependent Claim
34 words
The method of claim 6, further including, between steps (e) and (f), the step of applying a layer of particulate conductive material to the surface of the grid not in contact with the mold.
Claim 11
Dependent Claim
27 words
The method of claim 6, wherein the sinterable thermoplastic synthetic resin material is selected from the group consisting of polyvinyl chloride, polyvinyl chloride copolymers, polypropylene and polycarbonates.
Claim 12
Dependent Claim
21 words
The method of claim 6, wherein the sinterable thermoplastic synthetic resin material has a particle size of less than 250 microns.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |