There is provided a calibration system for a deskewing and registering device for an electrophotographic printing machine. The method includes a.) moving a sheet from a first position to a second position along a paper path; b.) sensing the position of the sheet at the first position and the...http://www.google.de/patents/US5715514?utm_source=gb-gplus-sharePatent US5715514 - Calibration method and system for sheet registration and deskewing
