Printing – Print plate feeding or delivering
Patent
1995-03-16
1996-01-16
Yan, Ren
Printing
Print plate feeding or delivering
1014151, B41F 2706
Patent
active
054838924
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a device for supplying printing plates to, and removing them from a plate cylinder of a rotary printing press.
DESCRIPTION OF THE PRIOR ART
A device for supplying and removing printing plates in rotary printing presses with a plate cylinder is known from JP 61-248834 A. The supply and removal of the printing plate from the plate cylinder takes place in this prior art device using one compartment of a longitudinally divided storage compartment.
It is disadvantageous in this prior art device that the gripper device for the leading edge of the printing plate and the gripper device for the end of the printing plate must exactly or precisely approach the lower opening of the respective supply or removal compartment.
SUMMARY OF THE INVENTION
It is the object of the present invention to provide a device for supplying printing plates to and removing them from a plate cylinder. The device in accordance with the present invention is designed in a space-saving manner and by means of which the plate changing operations can be performed in a short time.
Printing plates being supplied to and removed from a plate cylinder are stored in separate compartments of a storage container. One compartment is the supply compartment and the other is the removal compartment. An undivided guide compartment leading to the plate cylinder is located adjoining the supply and removal compartments.
The following advantages in particular are realized by the present invention. It is possible to temporarily store the printing plate because of the disposition of a longitudinally divided storage compartment. Guide plates disposed in the axial direction and pointing into the discharge compartment are provided for this purpose. The supply compartment is closed to printing plates to be removed toward the guide compartment by means of guide elements which are resilient toward one side, so that the supply compartment and the removal compartment can terminate in a space-saving manner in only a single guide compartment. It is possible to realize the position of the plate cylinder in regard to the removal and supply of plates in only two cylinder positions and thus in a short time. These operational steps are open print end, remove leading print edge, insert leading print edge, print end.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be described in detail below by means of several exemplary embodiments. In the associated drawings are shown in:
FIG. 1, a schematic side view of the device of the invention with a printing plate in the removal position;
FIG. 2, a view taken in the direction indicated by arrow A in accordance with FIG. 1;
FIG. 3, an enlarged representation of a detail taken at X in accordance with FIG. 1;
FIG. 4, an enlarged representation of the guide compartment as well as the cylinder device in accordance with FIG. 1, but with a printing plate in the supply position;
FIG. 5, an enlarged representation of the guide compartment with the cylinder device in the applied position;
FIG. 6, a second embodiment of the present invention variant in a schematic side view; and
FIG. 7, a view taken in the direction indicated by arrow P in accordance with FIG. 6.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A rotary printing press has several printing units, for example four printing units which, among other things, each typically contain a plate cylinder 2 and a rubber blanket cylinder 3, and of which one printing unit 1 is illustrated, as seen in FIG. 1. These cylinders 2, 3 are customarily seated in side frames 4, 6 of the rotary printing press by means of journals. The device of the invention is provided on an access side 7 to the cylinders 2, 3.
The device essentially consists of a storage compartment or container 8 with two partial compartments, a supply compartment 9 and a removal compartment 11. A compartment 12 is situated adjoining these tow compartments and disposed below them. A roller 13 for guiding and applying a printing plate is also provided.
The storage compartment or co
REFERENCES:
patent: 3793950 (1974-02-01), Kameko et al.
patent: 5111744 (1992-05-01), Wieland
patent: 5127328 (1992-07-01), Wieland
Koenig & Bauer Aktiengesellschaft
Yan Ren
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