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

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9718286
APP PUB NO 20160368287A1
SERIAL NO

15188005

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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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.

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Patent Owner(s)

  • HEIDELBERGER DRUCKMASCHINEN AG

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Conzelmann, Daniel Dielheim, DE 14 37
Dolz, Wolfgang Heidelberg, DE 14 34
Juenger, Arno Walldorf, DE 4 10
Schroeder, Raimund Hockenheim, DE 2 8

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