Patent ID: 6923118

Claim:
Apparatus for disengaging the drive wheel of a transfer cylinder from the drive wheel of an impression cylinder, said drive wheel of said transfer cylinder engaging said drive wheel of said impression cylinder when said transfer cylinder is in a thrown-on position, said drive wheel of said transfer cylinder further engaging a drive wheel of a forme cylinder, said apparatus comprising: a gear wheel chain which meshes with the drive wheels of the forme cylinder and the impression cylinder, means for pivoting said transfer cylinder to a thrown-off position wherein said drive wheel of said transfer cylinder is disengaged from said drive wheel of said impression cylinder, and a transfer element connected to said transfer cylinder and to said gear wheel chain so that said gear wheel chain produces a counter-rotation in said transfer cylinder synchronously with the pivoting of said transfer cylinder, said counter-rotation being opposite to said pivoting, whereby, the drive wheel of the transfer cylinder can disengage the drive wheel of the impression cylinder without increasing tension on gear teeth of the respective drive wheels.