Method for the cyclic conveyance of sheets through a printing machine

US7481429B2 · kind B2 · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Thorsten Eckart · Ilvesheim, DE
• Michael Füner · Karlsruhe, DE
• Peter Hachmann · Dossenheim, DE
• Karl-Heinz Helmstadter · Heidelberg, DE
• Andreas Detloff · Walldorf, DE

Key dates

• Filing date: Dec 21, 2005
• Grant date: Jan 27, 2009
• Expiry date: Nov 3, 2026

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41F21/102
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A method for cyclically conveying sheets through a printing-technological machine adjusts a sheet position with high accuracy. The sheets following one another are in each case held at the front edge in grippers of a gripper system during the conveyance, and wherein the sheet position is adjusted in that a pneumatic apparatus is actuated by a control device which processes signals from at least one fixed-location sensor for the sheet position, as at least one sheet runs past, a large number of measured position values of the sheet are determined successively by using at least one sensor, from the measured position values a characteristic value for the sheet position being determined in the control device, the characteristic value as actual value being compared with a setpoint, and the pneumatic apparatus being set for a following sheet as a function of the comparison in each case between the actual and intended value of the preceding sheet.