B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
153/41
B21D 51/44 (2006.01)
Patent
CA 1083023
ABSTRACT OF THE DISCLOSURE A corrugated metal sheet is incrementally bent perpend- icularly 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.
280866
Gowling Lafleur Henderson Llp
Korstrask Mekaniska G. Naslund
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