Abstract: A sheet-guiding apparatus for a turning device in a rotary printing machine guides a sheet being printed to prevent smearing. The turning device includes a turning drum and at least one sheet-guiding cylinder. The turning drum and the sheet-guiding cylinder define a sheet transfer region and a sheet transfer path. The sheet-guiding apparatus comprises an air blower means, at least one blower/suction device, and a lower sheet-guiding device. The air blower means, which is arranged upstream of the sheet transfer region, includes a first set of air outlet openings for directing compressed air toward the sheet-guiding cylinder and at least a second air outlet opening for directing compressed air into the transfer region. The blower/suction device, which is disposed within the sheet-bearing surface of the turning drum, communicates with a plurality of openings disposed in the sheet-bearing surface and is coupled to a pneumatic device.

Abstract: An inking mechanism for a rotary offset printing machine in which ink is taken from an ink reservoir in metered quantities and distributed by inking rollers to form an ink film which is adapted to be applied to a printing plate mounted on a plate cylinder, at least one of said inking rollers being a distributing roller mounted for rotational and axial reciprocating displacement. A distributing drive is provided which includes a releasable shift coupling operable for interrupting axial movement of the distributing roller upon a printing stoppage even though the printing machine continues to operate. Upon resumption of printing, the shift coupling is actuatable by a releasing mechanism so that the distributing rollers resume axial reciprocating movement. The illustrated shift coupling is shown as a pair of gear plates arranged between two drive wheels, and alternatively, a friction closure coupling can be used, either of which can be electromagnetically, pneumatically, or hydraulically actuated.