B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
153/33
B21D 11/20 (2006.01) B21D 5/14 (2006.01) B21D 7/08 (2006.01)
Patent
CA 1056707
ABSTRACT OF THE DISCLOSURE Method and machine for bending flat strip to exact full cylindrical shape in which the strip part is rolled to a cylindrical shape over a length, measured in peripheral direction, which is greater than the circumference of the cylinder, the bent strip part being elastically deflected outwards during rolling, a portion then being separated from the bent strip the length of which is exactly equal to the circumference of the desired cylinder, so that a true cylindrical shape is formed after the elastic recovery of the separated deflected portion.
260848
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