Patent attributes
A press has a frame including guides extending in a predetermined direction and a pair of tool-halves mounted on the frame and are movable on the guides in the direction toward and away from each other. Two knee-lever linkages symmetrically spacedly flanking each tool half with respect to a center plane substantially parallel to the direction, each coupled to the respective tool half and to the frame, and operable to shift the tool halves in the direction. Respective reversible, rotary drives each carry an eccentric output connected to respective drive links extending to the linkages. A controller connected to the drives rotates the eccentrics oppositely in respective first senses to press the one half in the direction against the other half and thereafter to pull the one half in the direction away from the other half with the two linkages never extending into a central region of the machine.
