Printing – Multicolor – Rotary machines
Patent
1990-09-10
1991-11-12
Fisher, J. Reed
Printing
Multicolor
Rotary machines
101230, B41F 2110, B41F
Patent
active
050638432
ABSTRACT:
A sheet-fed rotary printing machine for producing single-sided multi-color printing or perfector printing having a sheet-transfer cylinder disposed in travel direction of a sheet between impression cylinders of a first and a second printing unit, and having gripper systems assigned to all of the cylinders, includes a device defining a transfer gap between the sheet-transfer cylinder and the impression cylinder of the second printing unit, a device for enlarging the width of the transfer gap in relation to a normal gap width to the impression cylinder of the first printing unit, a gripper system having a device for bridging the enlarged width of the transfer gap, the gripper system being movable out of the circumference of the sheet-transfer cylinder so as to grip a leading or trailing edge of the sheet and transfer the gripped sheet to the outer cylindrical surface of the impression cylinder, and a device for driving the sheet-transfer cylinder and the following impression cylinder at identical circumferential speeds.
REFERENCES:
patent: 4026209 (1977-05-01), Wirz et al.
Fisher J. Reed
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Lerner Herbert L.
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