Patent ID: 7404357

Claim:
A device for pressing on a flexible printing form when it is being pulled onto a form cylinder of an offset printing press, the press having an offset cylinder, an axially parallel form cylinder, and an axially parallel impression cylinder, the device comprising: a switching-on or switching-off apparatus of the offset cylinder with respect to the form cylinder and the impression cylinder; the offset cylinder having a channel formed therein, and a cover disposed above said channel; the impression cylinder having a gripper system for sheets, the gripper system protruding beyond a circumferential contour of the impression cylinder and dipping into said channel formed in the offset cylinder during printing; said cover having a surface formed with support surfaces for supporting the printing form and supplementing a contour of the offset cylinder, and said cover having depressions formed therein lying deeper than said support surfaces and extending in the circumferential direction, enabling the gripper system to dip into said depressions.