Device and methods for raising and/or lowering a printing form
A printing form is either raised or is lowered by the use of a pressure device which includes a roller. The roller is arranged on a cross-beam in such a way that the roller can selectively be placed on, or taken off the forme cylinder, or a forme that is supported on the forme cylinder, by a device. The pressure device, or the cross-beam which supports the roller can be displaced in a manner such that the distance of the roller from the cylinder can selectively be increased.
1. A method for selectively drawing a dressing onto a cylinder and removing a dressing from a cylinder including:
providing a dressing storage assembly;
providing a dressing storage chute in said dressing storage assembly;
using said dressing storage chute for receiving a dressing to be removed from the cylinder;
providing a dressing feeding chute in said dressing storage assembly;
using said dressing feeding chute for feeding a dressing to be positioned on the cylinder;
providing a transport means serving to transport dressings in both said dressing feeding chute and said dressing storage chute in said dressing storage assembly;
providing a first, dressing holding means on said transport means and assigned to said dressing storage chute;
providing a second, dressing holding means on said transport means and assigned to said dressing feeding chute;
activating said first, dressing holding means for clamping a dressing during use of said transport means for transporting a dressing to be removed from the cylinder and received in said dressing storage chute and deactivating said second dressing holding means;
activating said second, dressing holding means for clamping a dressing during use of said transport means for transporting a dressing to be fed to said cylinder from said dressing feeding chute and deactivating said first dressing holding means;
providing a contact pressure device on said dressing storage assembly and intermediate said dressing storage chute, said dressing feeding chute and the cylinder;
supporting said contact pressure device for movement into and out of contact with the dressing on the cylinder;
contacting the dressing to be removed from the cylinder with said contact pressure device during removal of the dressing from the cylinder by pivoting said contact pressure device;
bending the dressing during said removal of the dressing from the cylinder in response to said contacting of the dressing with said contact pressure device;
causing a torque on the dressing during said removal of the dressing from the cylinder in response to said bending of the dressing; and
using said torque for removing an end of the dressing from the cylinder.
2. The method of claim 1 further including providing a drive motor for said contact pressure device and using said drive motor for moving said contact pressure device.
3. The method of claim 1 further including providing said contact pressure device having at least one roller.