Sheet-conveying device for machines used in the printing technology field

US6267225A · kind A · utility

Assignee

• Heidelberger Druckmascheinen Aktiengesellschaft · DE

Inventors

• Christian Compera · Sonneberg, DE
• Patrick Metzler · Gettorf, DE
• Anton Rodi · Leimen, DE
• Carsten Schonfeld · Kiel, DE
• Peter Schulz · Tettnang, DE
• Paul Weiss · Esslingen am Neckar, DE

Key dates

• Filing date: Apr 28, 1998
• Grant date: Jul 31, 2001
• Expiry date: Apr 28, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H5/004
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A device for conveying thin workpieces for machines used in the printing technology field having at least one movable conveying element having an electrically insulating contact surface supporting at least one workpiece as it is being conveyed, the contact surface of the conveying element being formed with regions of varying charge density by electric charges applied thereto, and the workpiece being held on the contact surface by electrostatic forces, includes a multiplicity of contacts engaging the surface of the conveying element, the multiplicity of contacts including at least one given group thereof, the multiplicity of contacts being disposed transversely to a direction in which the thin workpiece is conveyable by the conveying element and being distributed across the entire width of the workpiece, the multiplicity of contacts being connected to at least one d.c. voltage source.