E - Fixed Constructions – 04 – B
Patent
E - Fixed Constructions
04
B
113/66, 20/20.6
E04B 7/00 (2006.01) B21D 5/14 (2006.01) B21D 13/04 (2006.01)
Patent
CA 1236675
ABSTRACT The present invention relates to rounded corrugated sheet- in (4) whose profile exhibits crest portions (5), flanks (6), and bottom portions (7). The crest portions (5) are located on the concave side of the rounded sheet and are provided with grooves formed by pressing during rounding of the sheeting. The grooves form ribs (10) on the con- vex side of the sheet. In the rounding of the sheet, the material present in the crest-portions (5) of the sheet (4) is distributed in a manner which facilitates rounding and counteracts the formation of folds or wrinkles in the crest portions (5) and prevents other forms of damage. (Figure 9).
477204
Ahnstrom Ove
Gowling Lafleur Henderson Llp
LandOfFree
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