Patent ID: 7086620

Claim:
An aluminum shearing apparatus comprising: a frame having two side plates; one cutting edge unit provided between the two frame side plates and rotatably attached at an upper portion of two frame side plates; a second cutting edge unit opposing to the one cutting edge unit, and being rotatably attached at a lower portion of the two frame side plates between the two frame side plates so that an the upper portion of the second cutting edge unit is movable; half-cut pyramid-shaped cutting edges disposed respectively on the one cutting edge unit and the second cutting edge unit in a zigzag manner; movable means supported by a beam plate supported between the frame side plates for moving the second cutting edge unit; distal crests provided respectively on the distal sides of the respective half-cut pyramid-shaped cutting edges; clearances for shearing provided between the half-cut pyramid-shaped cutting edges of the one cutting edge unit and the second cutting edge unit; movable means for adjusting the opening for moving the lower portion of the one cutting edge unit; an input opening provided above the one cutting edge unit and the second cutting edge unit; and a discharge opening provided below the one cutting edge unit and the second cutting edge unit.