Metal deforming – By relatively movable offset tool-faces – Plural
Patent
1978-09-06
1980-04-01
Combs, Ervin M.
Metal deforming
By relatively movable offset tool-faces
Plural
72414, B21D 502, B21D 914, B21D 1702
Patent
active
041955110
ABSTRACT:
A corrugated metal sheet is incrementally bent perpendicularly with respect to its corrugations, by repeatedly transversely indenting upwardly the bottoms of the corrugation valleys so that the indentations extend in lines transversely across the sheet and extend into the corrugation sides which interconnect the valleys and ridges of the sheet. Each line of indentation causes the sheet to bend to some degree without detrimental stretching or drawing of the sheet.
REFERENCES:
patent: 2944583 (1960-07-01), Welindt
patent: 3664170 (1972-05-01), Davis
patent: 3824664 (1974-07-01), Seeff
Combs Ervin M.
Korstrask Mekaniska, G. Naslund
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