Plate bending machines

B - Operations – Transporting – 21 – D

Patent

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B21D 1/02 (2006.01) B21D 3/02 (2006.01) B21D 5/14 (2006.01) B21D 7/08 (2006.01)

Patent

CA 1174574

ABSTRACT There is disclosed a method and apparatus for rolling flat plate using a cylindrical mandrel and a plate gripper to form a pipe having low pipe diameter to plate thickness ratio by forming a notch or recess in the plate edge to be gripped so that the combined radial dimension of the notched plate edge and gripper is no greater than the plate thickness.

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