Printing machine and method of operating a printing machine
AssigneeBobst Bielefeld GmbH
InventorsMichael KARAKATSANIS, Andreas GARBSCH, Viktor HILDEBRAND
Life of this patent
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Abstract
A printing machine (10) comprises a doctor blade (14), a drive system (20) for urging the doctor blade (14) against a printing cylinder (16) of the printing machine (10), a sensor (32) adapted for sensing a force with which the doctor blade (14) is urged against the printing cylinder (16), and a mechanical locking element (34) adapted for locking the drive system (20) in its operating position. Further, a method of operating a printing machine (10) is presented.
Claims13
A printing machine comprising:
- a doctor blade,
- a drive system for urging the doctor blade against a printing cylinder of the printing machine,
- a sensor adapted for sensing a force with which the doctor blade is urged against the printing cylinder when the printing cylinder is substantially static, and
- a mechanical locking element adapted for locking the drive system in an operating position.
A method of operating a printing machine including a doctor blade, a drive system for urging the doctor blade against a printing cylinder of the printing machine, a sensor adapted for sensing a force with which the doctor blade is urged against the printing cylinder when the printing cylinder is substantially static, a mechanical locking element adapted for locking the drive system in an operating position, and a control unit, the method comprising:
- setting a target force for urging the doctor blade against the printing cylinder,
- moving the drive system in the operating position, wherein in the operating position, the force as measured by the sensor is the target force,
- locking the position of the drive system by the mechanical locking element,
- measuring an actual force by the sensor and comparing the actual force with the target force, and
- unlocking the position of the drive system and repeating the moving and the locking when the actual force is not equal to the target force,
- wherein the measuring is repeated at least once after a set time interval.
Dependencies are inferred from the claim text.