Device for a printing press comprising a plate cylinder and/or blanket cylinder
AssigneeMAN Roland Druckmaschinen AG
InventorEdgar F. Schoneberger
Life of this patent
Estimating the term…
Abstract
A device for adjusting the plate or blanket cylinders in a rotary printing press automatically moves the cylinders to predetermined positions for clamping or unclamping the plate or blanket. A memory stores predetermined set values for cylinder position, which are addressed by a triggering unit in response to operation selections. An angle coder senses the actual value of the cylinder position which is compared to the set values obtained from the memory to generate a control signal for adjusting a cylinder drive motor. In a preferred embodiment, the memory also stores the direction for rotating the cylinders as well as a number of cylinder movement steps for plate and blanket clamping and unclamping sequences.
Claims20
A device for a printing machine including a cylinder rotatably driven by a motor, the cylinder having a set of mechanical adjustments capable of being performed by a machine operator only when the cylinder is stationary at certain respective angular positions, said apparatus comprising, in combination,
- a selectively actuable triggering unit for selecting a mechanical adjustment from said set of mechanical adjustments,
- a set value memory storing said respective angular positions and being addressed by said triggering unit to provide at least one respective set value of angular position for a selected mechanical adjustment,
- a cylinder position sensor for sensing the angular position of the cylinder to provide an actual value of angular position, and
- comparator means for generating a signal to actuate said motor in response to actuation of said triggering unit and in response to a comparison between said set value of angular position provided by said memory and said actual value of angular position provided by said cylinder position sensor, so that said motor adjusts said cylinder to the respective angular position to permit the selected mechanical adjustment to be performed.
An automatic cylinder positioning system for aiding in the insertion and removal of a printing plate in a rotary printing machine, the printing plate being inserted and removed from a plate cylinder rotatably driven by a motor, the printing plate being capable of being inserted and removed by a machine operator only when the cylinder is stationary at certain respective angular positions, said system comprising, in combination,
- a selectively actuable triggering unit for selecting a mechanical adjustment from a predetermined set of mechanical adjustments including plate insertion and plate removal,
- a set-value memory storing said respective angular positions for the plate insertion and plate removal adjustments, and being addressed by said triggering unit to provide at least one respective set value of angular position for a selected mechanical adjustment,
- a cylinder position sensor for sensing the angular position of the cylinder to provide an actual value of angular position, and
- comparator means for generating a signal to actuate said motor in response to actuation of said triggering unit and in response to a comparison between said set value of angular position provided by said memory and said actual value of angular position provided by said cylinder position sensor, so that said motor automatically adjusts said cylinder to the respective angular positions for plate insertion and plate removal.
An automatic plate and blanket cylinder positioning system for aiding in the insertion and removal of a printing plate and blanket in a rotary offset printing machine including a plate cylinder and blanket cylinder being rotatably driven by a motor, the printing plate and blanket being capable of being inserted and removed by a machine operator only when the cylinders are stationary at certain respective angular positions, said system comprising, in combination,
- a selectively actuable triggering unit for selecting a mechanical adjustment from a predetermined set of mechanical adjustments including plate insertion, plate removal, blanket insertion and blanket removal,
- a set-value memory storing said respective angular positions for the plate insertion, plate removal, blanket insertion, and blanket removal adjustments, and being addressed by said triggering unit to provide at least one respective set value of angular position for a selected mechanical adjustment,
- a cylinder position sensor for sensing the angular position of the cylinders to provide an actual value of angular position, and
- comparator means for generating a signal to actuate said motor in response to actuation of said triggering unit and in response to a comparison between said set value of angular position and said actual value of angular position provided by said cylinder position sensor, so that said motor automatically adjusts said cylinders to the respective angular positions for plate insertion, plate removal, blanket insertion and blanket removal.
Dependencies are inferred from the claim text.