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AssigneeMAN Roland Druckmaschinen AG
InventorsKurt Difflipp, Heinrich Ochs
Estimating the term…
A shift-over device for controlling the turning drum grippers of a rotary sheet printing press optionally changeable for one-side printing or two-side printing and having a relatively rotatable gripper opening cam and an axially movable gripper turning cam includes a rotatable switching shaft carrying a stop arm with adjustable stops mounted on the press frame for engaging the stop arm and limiting the rotation of the switching shaft in opposite directions. A first crank arm is secured to the switching shaft and carries a lash lever coupled to the gripper opening cam for relatively rotating it incident to oscillations of the switching shaft. A second crank arm is secured to the switching shaft and coupled to a push arm having face cams engageable with push rods connected to the gripper turning cam for axially shifting it incident to oscillations of the switching shaft. In the preferred embodiment, a pneumatic cylinder is connected to a drive crank secured to the switching shaft and a source of pneumatic pressure with a control valve interposed between the source and the pneumatic cylinder is provided for actuating the cylinder to oscillate the switching shaft and simultaneously rotate the gripper opening cam and axially shift the gripper turning cam.
A shift-over device for controlling the turning drum grippers of a rotary sheet printing press optionally changeable for one-side printing or two-side printing and having a relatively rotatable gripper opening cam and an axially movable gripper turning cam, said device comprising, in combination, a rotatable switching shaft carrying a stop arm, adjustable stop means mounted on the press frame for engaging said stop arm and limiting the rotation of said switching shaft in opposite directions, means including a first crank arm secured to said switching shaft and carrying a lash lever coupled to said gripper opening cam for relatively rotating said gripper opening cam incident to oscillations of said switching shaft, means including a second crank arm secured to said switching shaft and coupled to a push arm having face cams engageable with push rods connected to said gripper turning cam for axially shifting said gripper turning cam incident to oscillations of said switching shaft, and control means for oscillating said switching shaft and stop arm between said adjustable stop means.
Dependencies are inferred from the claim text.