US RE45,028 E1 · Method and apparatus for laterally aligning a sheet in a processing machine and sheet-fed printing machine having the apparatus

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

Dependent claims

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
gripping the sheet with the gripper device in the predetermined position;
and
aligning the sheet with the gripper device, as needed, during a transfer of the sheet by the gripper device.

4 more elements

Dependencies are inferred from the claim text.

Method and apparatus for laterally aligning a sheet in a processing machine and sheet-fed printing machine having the apparatus

Life of this patent

Method and apparatus for laterally aligning a sheet in a processing machine and sheet-fed printing machine having the apparatus

Life of this patent

Abstract

Claims19