Monitoring apparatus for the sheet feed to a sheet-processing machine, and method of monitoring the sheet stream structure/the sheet stream

US6561509B2 · kind B2 · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Peter Kettenmann · Philippsburg, DE
• Hans Butterfass · Heidelberg, DE
• Carsten Huschle · Bretten, DE
• Robert Muller · Mörlenbach, DE
• Thomas Wolf · Barsinghausen, DE
• Martin Reuter · Dachau, DE

Key dates

• Filing date: Jul 11, 2001
• Grant date: May 13, 2003
• Expiry date: Jul 11, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2555/14
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A method is proposed for measuring thickness and detecting double and missing sheets during the sheet feed to a sheet-processing machine, such as a sheet-fed printing machine. A corresponding monitoring apparatus has one or more sensing elements above or beneath the sheet stream. The sensing element can be displaced, with an actuating device having an actuating drive, in the direction towards and away from the sheet stream. The actuating drive has at least one piezoelectric actuator or it is formed by the latter.