Method and device for aligning flat copies in sheet-processing machines

US6604739B2 · kind B2 · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Peter Förch · Neustadt, DE
• Andreas Henn · Trochtelfingen, DE

Key dates

• Filing date: Nov 9, 2001
• Grant date: Aug 12, 2003
• Expiry date: Jan 9, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2511/23
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A method of aligning flat copies in a sheet-processing machine includes the steps of determining the actual position of a sheetlike material in relation to a coordinate system; implementing a nominal position of a cylinder that accommodates the sheetlike material to be aligned on the jacket surface of the cylinder by correctively controlling non-contacting radial/axial magnetic bearings so as to compensate for position changes of the cylinder or components thereof from the nominal position; and maintaining the cylinder in the nominal position thereof until the aligned sheet material is transferred to transport units arranged farther downline; a device for performing the method; a printing unit having the device; and a multicolor rotary printing machine having the device.