Printing – Rolling contact machines – Rotary
Reexamination Certificate
2007-10-22
2011-10-25
Yan, Ren (Department: 2854)
Printing
Rolling contact machines
Rotary
C101S230000, C101S409000
Reexamination Certificate
active
08042465
ABSTRACT:
A method and a device for converting a mode of operation from straight printing to perfecting in a sheet-processing machine, includes a cam/follower control for operating a gripper system, in which cam followers are maintained in a position in which they are disengaged from control cams before a conversion of the mode of operation is performed. The method and the device convert a gripper system of a reversing drum between a straight or one-sided printing mode and a perfecting or recto-verso printing mode, by controlling pivoting and opening movements of grippers of the gripper system with a control cam. Initially, a cam follower is locked in a position in which it is disengaged from the control cam. Subsequently, a further cam follower is locked in a position in which it is disengaged from a further control cam. Then the gripper system is converted.
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German Search Report, dated Mar. 1, 2007.
Helmstädter Karl-Heinz
Maschler Ernst-Christian
Schmidt Thomas
Ferguson-Samreth Marissa L
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Locher Ralph E.
Stemer Werner H.
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