Sheet-transporting drum and printing machine having the sheet-transporting drum

US9738472B2 · kind B2 · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Juergen Rothaug · Schallstadt, DE
• Arno Juenger · Walldorf, DE
• Albert Maul · Heidelberg, DE
• Sven Goll · Heidelberg, DE
• Thomas Schmidt · Heidelberg, DE
• Alexander Knabe · Heidelberg, DE
• Daniel Conzelmann · Dielheim, DE
• Wolfgang Dolz · Heidelberg, DE
• Kai Oskar Mueller · Birkenau, DE
• Raimund Schroeder · Hockenheim, DE

Key dates

• Filing date: Apr 21, 2016
• Grant date: Aug 22, 2017
• Expiry date: Apr 21, 2036

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2405/50
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A sheet-transporting drum includes sheet-supporting areas each being formed of a first comb segment and a second comb segment having segment teeth. At least one of the comb segments is rotatable for adaptation to a sheet format. A mechanical leading-edge gripper is provided on the first comb segment and a pneumatic trailing-edge gripper is provided on the second comb segment. A mechanical trailing-edge gripper is additionally disposed on the second comb segment and is deactivatable in particular by format adjustments. This advantageously allows either the trailing edge of a sheet to be securely held down mechanically or a full-bleed print to be applied to the sheet when the trailing edge of the sheet is held down pneumatically. A sheet-fed printing machine is also provided.