Machine for processing a sheet of printing material

US7427064B2 · kind B2 · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Peter Förch · Neustadt, DE
• Markus Möhringer · Weinheim, DE
• Stefan Mutschall · Östringen, DE
• Paul Nicola · Heidelberg, DE
• Marius Stelter · Heidelberg, DE
• Ralf Wadlinger · Hockenheim, DE

Key dates

• Filing date: Jul 27, 2005
• Grant date: Sep 23, 2008
• Expiry date: Oct 15, 2026

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2801/21
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A machine for processing a sheet of printing material contains a first chain conveyor having a first gripper bar for holding a leading edge of the sheet, and a second chain conveyor having a rear gripper bar for simultaneously holding a trailing end of the sheet. A processing device is assigned to the chain conveyors for processing the sheet. A distance changing device is provided for temporarily reducing a gripper distance between the two gripper bars and, consequently, producing a sheet sag required for the processing of the sheet carried out by the processing device. The distance changing device defines a first circulation path of the front gripper bar, determined by the first chain conveyor, and a second circulation path of the rear gripper bar, determined by the second chain conveyor, running locally differently from each other. The processing device can be, for example, a sheet smoother.