US3918989A — Flexible electrode plate

Claim 1

Independent Claim 111 words

A METHOD FOR PREPARING A PASTED FLEXIBLE ELECTRODE PLATE CONSISTING ESSENTIALLY OF THE STEPS OF: A . FORMULATING AN AQUEOUS PASTE MIXTURE COMPRISING (1) ELECTROCHEMICALLY ACTIVE MATERIAL SELECTED FROM THE GROUP CONSISTING OF MERCURIC OXIDE, MANGANESE DIOXIDE, ZINC, CADMIUM, IRON, INDIUM, MAGNESIUM, ALUMINUM AND LEAD, (2) WATER-SOLUBLE RESIN BINDER MATERIAL AND (3) AN AMOUNT OF COMPATABLE HYDROPHILIC PLASTICIZER SUFFICIENT TO IMPART FLEXIBILITY TO THE FINISHED PLATE, B. SECURING THE PASTE TO AN ELECTRICALLY CONDUCTIVE SUBSTRATE TO FORM THE ELECTRODE PLATE. C. DRYING THE ELECTRODE PLATE AT TEMPERATURES IN THE RANGE OF ABOUT 50*-90*F. UNDER CONTROLLED HUMIDITY CONDITIONS TO PREPARE SAID PASTED FLEXIBLE ELECTROLDE PLATE IN A FINISHED STATE WITHOUT FURTHER TREATMENT.

Claim 2

Independent Claim 111 words

A METHOD FOR PREPARING A PASTED FLEXIBLE ELECTRODE PLATE CONSISTING ESSENTIALLY OF THE STEPS OF: A . FORMULATING AN AQUEOUS PASTE MIXTURE COMPRISING (1) ELECTROCHEMICALLY ACTIVE MATERIAL SELECTED FROM THE GROUP CONSISTING OF MERCURIC OXIDE, MANGANESE DIOXIDE, ZINC, CADMIUM, IRON, INDIUM, MAGNESIUM, ALUMINUM AND LEAD, (2) WATER-SOLUBLE RESIN BINDER MATERIAL AND (3) AN AMOUNT OF COMPATABLE HYDROPHILIC PLASTICIZER SUFFICIENT TO IMPART FLEXIBILITY TO THE FINISHED PLATE, B. SECURING THE PASTE TO AN ELECTRICALLY CONDUCTIVE SUBSTRATE TO FORM THE ELECTRODE PLATE. C. DRYING THE ELECTRODE PLATE AT TEMPERATURES IN THE RANGE OF ABOUT 50*-90*F. UNDER CONTROLLED HUMIDITY CONDITIONS TO PREPARE SAID PASTED FLEXIBLE ELECTROLDE PLATE IN A FINISHED STATE WITHOUT FURTHER TREATMENT.

Claim 3

Dependent Claim 33 words

The method of claim 1 wherein the active material comprises zinc and the paste mixture further comprises a reducible zinc-active material as a charge reserve and a mercuric compound as a corrosion inhibitor.

Claim 4

Dependent Claim 18 words

The method of claim 1 wherein the humidity is maintained in the range of 30 to 70 percent.

Claim 5

Dependent Claim 18 words

The method of claim 1 wherein the humidity is maintained in the range of 40 to 60 percent.

Claim 6

Dependent Claim 111 words

A FLEXIBLE ELECTRODE PLATE FOR USE AS AN ANODE OF A RECHARGEABLE ALKALINE GALVANIC CELL COMPRISING: A. AN ELECTRICALLY CONDUCTIVE SUBSTRATE, COMPRISING, B. A PASTE FORMULATION SECURED TO THE SUBSTRATE COMPRISING: ELECTROCHEMICALLY ACTIVE ZINC, WATER-SOLUBLE RESINOUS BINDER IN AN AMOUNT FROM ABOUT 0.1 TO ABOUT 5 WEIGHT PERCENT OF THE PLATE, HYDROPHILIC POLYETHYLENE GLYCOL PLASTICIZER HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM ABOUT 4,000 TO ABOUT 20,000, SAID PLASTICIZER BEING COMPATIBLE WITH THE BINDER AND ACTIVE MATERIAL AND PRESENT IN AN AMOUNT BETWEEN ABOUT 5 TO ABOUT 50 WEIGHT PERCENT BASED ON THE BINDER AND IN ANY EVENT PRESENT IN SUFFICIENT AMOUNT TO IMPART SUBSTANTIALY FLEXIBILITY TO SAID FLEXIBLE ELECTRODE PLATE.

Claim 7

Dependent Claim 111 words

A FLEXIBLE ELECTRODE PLATE FOR USE AS AN ANODE OF A RECHARGEABLE ALKALINE GALVANIC CELL COMPRISING: A. AN ELECTRICALLY CONDUCTIVE SUBSTRATE, COMPRISING, B. A PASTE FORMULATION SECURED TO THE SUBSTRATE COMPRISING: ELECTROCHEMICALLY ACTIVE ZINC, WATER-SOLUBLE RESINOUS BINDER IN AN AMOUNT FROM ABOUT 0.1 TO ABOUT 5 WEIGHT PERCENT OF THE PLATE, HYDROPHILIC POLYETHYLENE GLYCOL PLASTICIZER HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM ABOUT 4,000 TO ABOUT 20,000, SAID PLASTICIZER BEING COMPATIBLE WITH THE BINDER AND ACTIVE MATERIAL AND PRESENT IN AN AMOUNT BETWEEN ABOUT 5 TO ABOUT 50 WEIGHT PERCENT BASED ON THE BINDER AND IN ANY EVENT PRESENT IN SUFFICIENT AMOUNT TO IMPART SUBSTANTIALY FLEXIBILITY TO SAID FLEXIBLE ELECTRODE PLATE.

Claim 8

Dependent Claim 29 words

The electrode plate of claim 5 wherein the electrocheMically active material is zinc and the binder is selected from the group consisting of polyvinyl alcohol, polyacrylamide and cellulose derivatives.

Claim 9

Dependent Claim 15 words

The flexible electrode plate of claim 5 wherein said water-soluble resinous binder is methyl cellulose.

Claim 10

Dependent Claim 20 words

The flexible electrode plate of claim 7 wherein said polyethylene glycol plasticizer has an average molecular weight of about 20,000.

Claim 11

Dependent Claim 107 words

A flexible zinc electrode plate for use as the anode of a rechargeable alkaline galvanic cell and capable of being wound without deleterious effect about a 1/4 inch diameter mandrel, said plate comprising an electrically conductive substrate; a paste formulation secured to the substrate comprising electrochemically active particulate zinc material, water soluble resinous binder in an amount from about 0.1 to about 5 weight percent of the plate, and a minor amount but in any event at least 1 weight percent based on the weight of the binder of a hydrophilic plasticizer of polyethylene glycol having an average molecular weight of from about 4,000 to about 20,000.

Claim 12

Dependent Claim 107 words

A flexible zinc electrode plate for use as the anode of a rechargeable alkaline galvanic cell and capable of being wound without deleterious effect about a 1/4 inch diameter mandrel, said plate comprising an electrically conductive substrate; a paste formulation secured to the substrate comprising electrochemically active particulate zinc material, water soluble resinous binder in an amount from about 0.1 to about 5 weight percent of the plate, and a minor amount but in any event at least 1 weight percent based on the weight of the binder of a hydrophilic plasticizer of polyethylene glycol having an average molecular weight of from about 4,000 to about 20,000.

Claim 13

Dependent Claim 108 words

A FLEXIBLE ELECTRODE PLATE FOR USE AS THE ANODE OF A RECHARGEABLE ALKALINE GALVANIC CELL COMPRISING: A. AN ELECTRICALLY CONDUCTIVE SUBSTRATE, B. A PASTE FORMUALTION SECURED TO THE SUBSTRATE COMPRISING: ELECTROCHEMICALLY ACTIVE CADMIUM, WATER-SOLUBLE RESINOUS BINDER IN AN AMOUNT FROM ABOUT 0.1 TO ABOUT WEIGHT PERCENT OF THE PLATE, HYDROPHILIC POLYETHYLENE GLYCOL PLASTICIZER HAVING AN AVERAGE MOLECULAR WEIGHT FROM ABOUT 4,000 TO ABOUT 20,000, SAID PLASTICIZER BEING COMPATIBLE WITH THE BINDER AND ACTIVE MATERIAL AND PRESENT IN AN AMOUNT BETWEEN ABOUT 5 TO ABOUT 50 WEIGHT PERCENT BASED ON THE BINDER AND IN ANY EVENT PRESENT IN SUFFICIENT AMOUNT TO IMPART SUBSTANTIAL FLEXIBILITY TO SAID FLEXIBLE ELECTRODE PLATE.

Claim 14

Dependent Claim 108 words

A FLEXIBLE ELECTRODE PLATE FOR USE AS THE ANODE OF A RECHARGEABLE ALKALINE GALVANIC CELL COMPRISING: A. AN ELECTRICALLY CONDUCTIVE SUBSTRATE, B. A PASTE FORMUALTION SECURED TO THE SUBSTRATE COMPRISING: ELECTROCHEMICALLY ACTIVE CADMIUM, WATER-SOLUBLE RESINOUS BINDER IN AN AMOUNT FROM ABOUT 0.1 TO ABOUT WEIGHT PERCENT OF THE PLATE, HYDROPHILIC POLYETHYLENE GLYCOL PLASTICIZER HAVING AN AVERAGE MOLECULAR WEIGHT FROM ABOUT 4,000 TO ABOUT 20,000, SAID PLASTICIZER BEING COMPATIBLE WITH THE BINDER AND ACTIVE MATERIAL AND PRESENT IN AN AMOUNT BETWEEN ABOUT 5 TO ABOUT 50 WEIGHT PERCENT BASED ON THE BINDER AND IN ANY EVENT PRESENT IN SUFFICIENT AMOUNT TO IMPART SUBSTANTIAL FLEXIBILITY TO SAID FLEXIBLE ELECTRODE PLATE.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-11-10	1979-05-12	1979-11-11	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-11-10	1983-05-12	1983-11-11	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-11-10	1987-05-12	1987-11-11	$7700.00	Window Closed / Lapsed

Flexible electrode plate

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