Patent US2811745A successfully refreshed from Google Patents.
US2811745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making battery separators
Assignee: Individual
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Filing: 1953-08-28
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Granted: 1957-11-05
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Expires: 1973-08-28
Abstract
No abstract record available.
Inventors
- 👤 Dowse Joseph
- 👤 Holt Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:19
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/403; H01M50/406; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
250 words
AN APPARATUS FOR CONTINUOUSLY DEFORMING WEBS OF RESIN IMPREGNATED SHEET MATERIAL TO FROM RIBBED BATTERY SEPARATORS THEREOF COMPRISING A FORMING DRUM HAVING A SOLID RIM, A SERIES OF ROLLS ARRANGED ABOUT A SUBSTANTIAL PORTION OF THE PERIPHERY OF SAID DRUM, EACH OF SAID ROLLS HAVING ITS AXIS OF ROTATION PARALLEL TO THAT OF SAID DRUM, MEANS FOR PASSING SAID SHEET MATERIAL BETWEEN SAID DRUM AND SAID ROLLS, MEANS FOR HEATING SAID DRUM AND POWER MEANS FOR DRIVING SAID DRUM AND SAID ROLLS, SAID DRUM HAVING A SERIES OF PARALLED, CIRCUMFERENTIAL RIB FORMING GROOVES ARRANGED ON THE PERIPHERY THEREOF, EACH OF SAID ROLLS HAVING A SERIES OF PARALLEL, CIRCUMFERENTIAL RIB FORMING FINS ARRANGED ON THE PERIPHERY THEREOF, SAID FINS BEING DISPOSED TO REGISTER WITH SAID GROOVES, THE RIB FORMING FINS ON THE LEADING ROOLS OF SAID SERIES OF ROLLS BEING ARRANGED IN ECHELON WHEREBY THE WEB OF SHEET MATERIAL AS IT PASSES BETWEEN SAID DRUM AND SAID ROLL IS FIRST DEFORMED ITO SAID GROOVES BY SAID FINS IN THE MIDDLE AREA AND THEN IS PROGRESSIVELY DEFORMED OUTWARDLY TOWARD EACH SIDE OF SAID WEB, THE DRUM BEING RECESSED BETWEEN THE GROOVES THEREON TO RESTRICT THE AREA OF APPLICATION OF PRESSURE ON THE SHEET MATERIAL TO SUBSTANTIALLY THAT AREA INCLUDED BETWEEN A RIB AND A GROOVE, AND SAID GROOVES HAVING A SUFFICIENT DEPTH THAT UPON THE DEFORMATION OF THE WEB INTO A GROOVE BY THE ACTION OF A CORRESPONDING FIN, NO PORTION OF THE WEB MAKES CONTACT WITH THE BOTTOM OF THE GROOVE.
Claim 2
Independent Claim
250 words
AN APPARATUS FOR CONTINUOUSLY DEFORMING WEBS OF RESIN IMPREGNATED SHEET MATERIAL TO FROM RIBBED BATTERY SEPARATORS THEREOF COMPRISING A FORMING DRUM HAVING A SOLID RIM, A SERIES OF ROLLS ARRANGED ABOUT A SUBSTANTIAL PORTION OF THE PERIPHERY OF SAID DRUM, EACH OF SAID ROLLS HAVING ITS AXIS OF ROTATION PARALLEL TO THAT OF SAID DRUM, MEANS FOR PASSING SAID SHEET MATERIAL BETWEEN SAID DRUM AND SAID ROLLS, MEANS FOR HEATING SAID DRUM AND POWER MEANS FOR DRIVING SAID DRUM AND SAID ROLLS, SAID DRUM HAVING A SERIES OF PARALLED, CIRCUMFERENTIAL RIB FORMING GROOVES ARRANGED ON THE PERIPHERY THEREOF, EACH OF SAID ROLLS HAVING A SERIES OF PARALLEL, CIRCUMFERENTIAL RIB FORMING FINS ARRANGED ON THE PERIPHERY THEREOF, SAID FINS BEING DISPOSED TO REGISTER WITH SAID GROOVES, THE RIB FORMING FINS ON THE LEADING ROOLS OF SAID SERIES OF ROLLS BEING ARRANGED IN ECHELON WHEREBY THE WEB OF SHEET MATERIAL AS IT PASSES BETWEEN SAID DRUM AND SAID ROLL IS FIRST DEFORMED ITO SAID GROOVES BY SAID FINS IN THE MIDDLE AREA AND THEN IS PROGRESSIVELY DEFORMED OUTWARDLY TOWARD EACH SIDE OF SAID WEB, THE DRUM BEING RECESSED BETWEEN THE GROOVES THEREON TO RESTRICT THE AREA OF APPLICATION OF PRESSURE ON THE SHEET MATERIAL TO SUBSTANTIALLY THAT AREA INCLUDED BETWEEN A RIB AND A GROOVE, AND SAID GROOVES HAVING A SUFFICIENT DEPTH THAT UPON THE DEFORMATION OF THE WEB INTO A GROOVE BY THE ACTION OF A CORRESPONDING FIN, NO PORTION OF THE WEB MAKES CONTACT WITH THE BOTTOM OF THE GROOVE.
Claim 3
Dependent Claim
220 words
IN THE MANUFACTURE OF A SEPARATOR FOR ELECTRIC STORAGE BATTERIES FROM A WEB OF PAPER PULP IMPREGNATED WITH AN UNCURED ACID-RESISTANT THERMOSETTING RESIN IN QUANTITY INSUFFICIENT WHEN CURED TO IMPAIR THE DESIRED ELECTROLYTE PERMEABILITY OF THE SEPERATOR, THE PROCESS OF FORMING RIBS IN THE WEB BY ROLLING THE WEB BETWEEN COOPERATING ROLLS HAVING INTERFITTING FINS AND GROOVES CHARACTERIZED BY PROGRESSIVELY DEFORMING THE IMPREGNATED WEB ABOUT PARALLEL FINS FROM THE MIDDLE OUTWARDLY TOWARD EACH EDGE OF THE WEB PARALLEL TO THE DEFORMATION, SIMULTANEOUSLY FORCING THE DEFORMED PORTION INTO THE COOPERATING GROOVE, THEN MAINTAINING THE DEFORMATIONS BY PASSING THE DEFORMED WEB UNDER A BANK OF ROLLERS PROVIDED WITH FINS, APPLYING SUFFICIENT PRESSURE BY MEANS OF SAID FINS TO THE WALL AREA ONLY OF THE DEFORMATIONS TO IRON SUBSTANTIALLY THE WHOLE AREA OF THE WALL OF SAID DEFORMATIONS INTO CONTACT WITH THE WALLS OF THE GROOVES, SIMULTANEOUSLY APPLYING HEAT TO SAID WALL, MAINTAINING HEAT AND PRESSURE AGAINST THE WALLS OF SAID DEFORMATIONS FOR A TIME SUFFICIENT TO ADVANCE THE RESIN IN THE WALLS OF THE DEFORMED AREA SUBSTANTIALLY TO THE INFUSIBLE STAGE WHEREBY A SET OF STABLE, FINE RIBS ARE FORMED IN THE WEB, WHILE AT ALL TIMES MAINTAINING THAT PORTIONS OF THE WEB WHICH FORMS THE OUTER TOP SURFACE OF A RIB OUT OF CONTACT WITH THE BOTTOM WALL OF A GROOVE.
Claim 4
Dependent Claim
220 words
IN THE MANUFACTURE OF A SEPARATOR FOR ELECTRIC STORAGE BATTERIES FROM A WEB OF PAPER PULP IMPREGNATED WITH AN UNCURED ACID-RESISTANT THERMOSETTING RESIN IN QUANTITY INSUFFICIENT WHEN CURED TO IMPAIR THE DESIRED ELECTROLYTE PERMEABILITY OF THE SEPERATOR, THE PROCESS OF FORMING RIBS IN THE WEB BY ROLLING THE WEB BETWEEN COOPERATING ROLLS HAVING INTERFITTING FINS AND GROOVES CHARACTERIZED BY PROGRESSIVELY DEFORMING THE IMPREGNATED WEB ABOUT PARALLEL FINS FROM THE MIDDLE OUTWARDLY TOWARD EACH EDGE OF THE WEB PARALLEL TO THE DEFORMATION, SIMULTANEOUSLY FORCING THE DEFORMED PORTION INTO THE COOPERATING GROOVE, THEN MAINTAINING THE DEFORMATIONS BY PASSING THE DEFORMED WEB UNDER A BANK OF ROLLERS PROVIDED WITH FINS, APPLYING SUFFICIENT PRESSURE BY MEANS OF SAID FINS TO THE WALL AREA ONLY OF THE DEFORMATIONS TO IRON SUBSTANTIALLY THE WHOLE AREA OF THE WALL OF SAID DEFORMATIONS INTO CONTACT WITH THE WALLS OF THE GROOVES, SIMULTANEOUSLY APPLYING HEAT TO SAID WALL, MAINTAINING HEAT AND PRESSURE AGAINST THE WALLS OF SAID DEFORMATIONS FOR A TIME SUFFICIENT TO ADVANCE THE RESIN IN THE WALLS OF THE DEFORMED AREA SUBSTANTIALLY TO THE INFUSIBLE STAGE WHEREBY A SET OF STABLE, FINE RIBS ARE FORMED IN THE WEB, WHILE AT ALL TIMES MAINTAINING THAT PORTIONS OF THE WEB WHICH FORMS THE OUTER TOP SURFACE OF A RIB OUT OF CONTACT WITH THE BOTTOM WALL OF A GROOVE.
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) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |