Method and apparatus for laterally aligning a sheet in a processing machine and sheet-fed printing machine having the apparatus
AssigneeHeidelberger Druckmaschinen AG
InventorsHolger Edinger, Jürgen Zeltner
Life of this patent
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Abstract
A method and an apparatus for laterally aligning a sheet in a processing machine, in particular a printing machine, carries out lateral sheet alignment on a cylinder of the printing machine, e.g. a feed cylinder. In order to achieve large correction distances in relation to a possible lateral movement capability of a gripper bar, the latter is prealigned prior to correction in such a way that, in the event of deviation from predetermined desired values, it is prealigned laterally to defined positions. A sheet-fed rotary printing machine having the apparatus, is also provided.
Claims19
A method for laterally aligning sheets on a cylinder of a processing machine, the method comprising the following steps:
- sensing an actual position of the sheet with at least one sensor;
- prealigning a gripper device to a predetermined position in accordance with the actual position of the sheet relative to its side position, prior to the sheet being gripped by the gripper device;
- and
- repeating the prealigning step, as needed, during a transfer of the sheet by the gripper device.
An apparatus for laterally aligning sheets on a cylinder of a processing machine, the apparatus comprising:
- an actuating drive for generating a linear movement;
- a connecting rod connected to said actuating drive;
- a movably mounted gripper device;
- a driver fastened on said gripper device and mounted rotatably and secured against displacement on said connecting rod;
- and
- a rotary disengagement device disposed in a cylinder body of the cylinder and interconnecting said connecting rod and said driver.
An apparatus for laterally aligning sheets on a cylinder of a processing machine, the apparatus comprising:
- a stationary linear actuating drive disposed outside the cylinder;
- a gripper device;
- and
- a gear mechanism, disposed in a cylinder body of the cylinder, for converting a rotary movement of said actuating drive into a linear movement of said gripper device.
Dependencies are inferred from the claim text.