Patent · US Active

Sheet-transport drum and printing machine with a sheet-transport drum

US9718286B2 · kind B2 · utility

5Cited by

3References

11Claims

0Family size

Assignee

Heidelberger Druckmaschinen AG · DE

Inventors

Wolfgang Dolz · Heidelberg, DE
Raimund Schroeder · Hockenheim, DE
Arno Juenger · Walldorf, DE
Daniel Conzelmann · Dielheim, DE

Key dates

Filing date	Jun 21, 2016
Grant date	Aug 1, 2017
Priority date	—
Expiry date	Jun 21, 2036

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41J13/226
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A sheet-transport drum includes at least two sheet-supporting surfaces with suction openings. Each respective sheet-supporting surface is formed of first and second comb segments with segment teeth. Suction grooves are provided in the segment teeth and a trailing-edge suction groove is provided in the sheet-supporting surface of each respective second comb segment. A rotary valve is provided for a timed supply of suction air. A plurality of vacuum sources is provided and a trailing-edge suction groove is assigned to each respective vacuum source by the rotary valve. This ensures that the vacuum provided by a respective trailing-edge suction groove at the trailing edge of a respective sheet is reliably maintained even if a previous or following sheet is missing. A sheet-fed printing machine with the sheet-transport drum is also provided.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.