Inking units of a printing press
A color deck of a printing machine is usable to ink a printing cylinder. A roller nip is formed by at least one friction cylinder that is driven by a drive motor for rotary movement. A freewheel clutch is situated between the first friction cylinder and the drive motor for that first friction cylinder.
1. An inking unit of a printing press comprising:
a forme cylinder in said printing press;
an inking roller train in said inking unit and including a plurality of inking rollers usable to ink said forme cylinder;
first, second and third ink forme rollers in said inking roller train and each in engagement with said forme cylinder;
a first distribution cylinder in said inking roller train, said first distribution cylinder being in frictional contact with two adjacent ones of said ink forme rollers and being rotationally driven in a production direction of rotation of said inking unit solely by said frictional contact with said two adjacent ones of said ink forme rollers in said inking roller train;
a second distribution cylinder in said inking roller train, said second distribution cylinder being in contact with a third one of said ink forme rollers;
a drive motor in said inking unit;
a first mechanical drive connection between said drive motor and said second distribution cylinder for positively rotationally driving said second distribution cylinder both in said production direction of rotation of said inking unit and counter to said production direction of rotation of said inking unit by said drive motor; and
a second mechanical drive connection between said drive motor and said first distribution cylinder for positively rotationally driving said first distribution cylinder counter to said production direction of rotation of said inking unit, said second mechanical drive connection between said first distribution cylinder and said drive motor including a one-way clutch which is operable to transmit positive drive rotation to said first distribution cylinder from said drive motor only counter to said production direction of rotation of said inking unit.
2. The inking unit of claim 1 , further including a drive motor control for said drive motor and wherein said drive motor is operated one of controlled and regulated with respect to one of an output and a torque at least during a printing operation in which said inking unit is in a print-on position.
3. The inking unit of claim 1 , further including a shared oscillating gearing system for providing a forced oscillating movement of said first and said second distribution cylinders.
4. The inking unit of claim 3 , wherein said shared oscillating gearing is driven by said drive motor.
5. The inking unit of claim 3 , further including a first oscillation drive for said first distribution cylinder and a first oscillation drive transmission usable to convert rotational movement of said first distribution cylinder in said production direction into axial movement and further including a second oscillation drive for said second distribution cylinder, said first oscillation drive and said second oscillation drive being in drive connection with each other.
6. The inking unit of claim 1 , further including a transmission including a one-way clutch for transferring a torque to said first distribution cylinder to rotationally drive said first distribution cylinder counter to said production direction of rotation of said inking unit, said transmission further including a torque-limiting clutch in said direction of rotation counter to said production direction of rotation.
7. The inking unit of claim 1 , wherein said drive motor has no positive drive connection with said forme cylinder.
8. The printing unit of claim 1 , further including a forme cylinder drive motor different from said first and said second distribution cylinder drive motor.