Method of feeding sheets to a sheet-processing machine, sheet-smoothing method and device

US7261292B2 · kind B2 · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Hans Butterfass · Heidelberg, DE
• Wolfgang Dolz · Heidelberg, DE
• Hendrik Frank · Heidelberg, DE
• Andreas Henn · Trochtelfingen, DE
• Markus Möhringer · Weinheim, DE

Key dates

• Filing date: Apr 12, 2004
• Grant date: Aug 28, 2007
• Expiry date: Aug 1, 2025

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2301/51212
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

In a method and an apparatus for feeding sheets to a sheet-processing machine, the leading edge of the sheet is smoothed before the grippers are closed by further transport into the sheet-processing machine. A curvature or bend in the sheet transport direction is imparted to the sheet. The feed table has, in its feeder region, a curvature in the sheet transport direction, against which curvature the sheet leading edge is laid with the aid of pneumatic or mechanical devices.