Apparatus and method of producing multiple corrugations simultaneously
First Claim
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1. A METHOD OF FORMING A PLURALITY OF CORRUGATIONS SIMULTANEOUSLY IN A METALLIC SHEET, COMPRISING LAYING THE SHEET OVER A MEMBER CONTAINING A PLURALITY OF FEMALE DIES HAVING CAVITIES OF DESIRED CONFIGURATIONS, APPLYING A PREGATHERING FORCE UPON THE SHEET SUFFICIENT ONLY TO PRODUCE A WAVE FORM THEREIN WHOSE TROUGHS EXTEND INTO THE DIE CAVITIES WITHOUT EXCEEDING THE ELASTIC LIMIT OF THE SHEET, AND THEN APPLYING A PLURALITY OF MALE DIES CORRESPONDING TO THE FEMALE DIES SIMULTANEOUSLY TO THE SHEET WITH A FORCE SUFFICIENT TO MOLD THE SAME IN THE FEMALE DIE CAVITIES TO THEREBY MINIMIZE OVERALL SHRINKAGE OF THE CORRUGATED SHEET.
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1 Claim
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1. A METHOD OF FORMING A PLURALITY OF CORRUGATIONS SIMULTANEOUSLY IN A METALLIC SHEET, COMPRISING LAYING THE SHEET OVER A MEMBER CONTAINING A PLURALITY OF FEMALE DIES HAVING CAVITIES OF DESIRED CONFIGURATIONS, APPLYING A PREGATHERING FORCE UPON THE SHEET SUFFICIENT ONLY TO PRODUCE A WAVE FORM THEREIN WHOSE TROUGHS EXTEND INTO THE DIE CAVITIES WITHOUT EXCEEDING THE ELASTIC LIMIT OF THE SHEET, AND THEN APPLYING A PLURALITY OF MALE DIES CORRESPONDING TO THE FEMALE DIES SIMULTANEOUSLY TO THE SHEET WITH A FORCE SUFFICIENT TO MOLD THE SAME IN THE FEMALE DIE CAVITIES TO THEREBY MINIMIZE OVERALL SHRINKAGE OF THE CORRUGATED SHEET.
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Current AssigneeD Orazio Peter J, Eugene Hindin, Louis A. Kandle
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Original AssigneeD Orazio Peter J, Eugene Hindin, Louis A. Kandle
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InventorsKandle, Louis A., Hindin, Eugene, D ORAZIO PETER J
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Application NumberUS04/407,029Time in Patent Office1,049 DaysField of SearchUS Class Current72/385CPC Class CodesB21D 13/02 by pressing
