B - Operations – Transporting – 26 – B
Patent
B - Operations, Transporting
26
B
30/53
B26B 13/00 (2006.01) B23D 29/00 (2006.01) B23D 35/00 (2006.01) B26B 17/02 (2006.01)
Patent
CA 1202772
TITLE: CUTTING APPARATUS INVENTOR: Stuart Malcolm Harrison ABSTRACT OF DISCLOSURE A pair of cutter blades is provided for cutting sheet metal in flat tubular form. The blades are pivotally connected together in scissors-fashion so as to be capable of relative movement between each other. At least one of the blades is formed with a cutting edge comprising a piercing point or region having on each side portions which trail the leading extremity of the piercing point or region considered in the direction of cutting, whereby in operation after initial piercing of the metal to be cut, and on continued cutting, the incision made by the piercing point or region increases away from the pierced region towards the sides of the material being cut. The blades may be operated by means of a piston and cylinder device driving a pair of links connecting the piston to the two blades at positions off-set from the pivotal axis of the two blades.
412525
Harrison Stuart M.
Haskett
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