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Grippers for sheet-fed printing presses
| Details |
Inventors: Wadlinger, Ralf;
Assignee: Heidelberger Druckmaschinen AG (Heidelberg, DE)
Primary Examiner: Burr; Edgar S.
Assistant Examiner: Colilla; Daniel J.
Attorney, Agent or Firm: Lerner; Herbert L., Greenberg; Laurence A.
Grippers for sheet-fed printing presses having gripper seats arranged on a gripper bar housing, gripper finger supports with gripper fingers swivellably carried by a gripper shaft adjacent the gripper bar housing, a drive acting via the gripper shaft, springy elements for determining a closing force of the grippers, and entrainer pins carried by the gripper shaft and engaging in slots formed in the gripper finger supports. |
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DETAILED DESCRIPTION It is accordingly an object of the invention to provide grippers for sheet-fed printing presses which are of simpler and more economical construction than those of similar type known heretofore.
With the foregoing and other objects in view, there is provided, in accordance with the invention, grippers for sheet-fed printing presses having gripper seats arranged on a gripper bar housing, gripper finger supports with gripper fingers swivellably carried by a gripper shaft adjacent the gripper bar housing, a drive acting via the gripper shaft, and springy elements for determining a closing force of the grippers, comprising entrainer pins carried by the gripper shaft and engaging in slots formed in the gripper finger supports.
In accordance with another feature of the invention, the grippers include stop screws for the entrainer pins provided in the gripper finger supports, the stop screws being actuatable for individually adjusting the entrainment by the gripper shaft for each of the gripper finger supports.
In accordance with a further feature of the invention, the springy elements are the gripper fingers.
In accordance with an added feature of the invention, each of the gripper finger supports is pressable by one of the springy elements in closing direction.
In accordance with an additional feature of the invention, the springy elements are spring clips which are braced against the gripper bar housing and the gripper finger supports.
In accordance with a concomitant feature of the invention, the springy elements are braced against the gripper shaft and the gripper finger supports.
An advantage of the invention is that costly entrainers can be replaced by considerably lower-priced entrainer pins.
Costs, as well as construction space, are thereby reduced.
Assembly expense is also markedly minimized.
As noted hereinbefore, stop screws for the entrainer pins are provided in the gripper finger supports and serve for individually adjusting the entrainment by the gripper shaft for each of the gripper finger supports
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Optical Systems 
