Printing – Cleaning attachments
Reexamination Certificate
2000-09-15
2002-11-26
Colilla, Daniel J. (Department: 2854)
Printing
Cleaning attachments
C101S423000, C101S480000
Reexamination Certificate
active
06484636
ABSTRACT:
BACKGROUND OF THE INVENTION
Field of the Invention
The invention relates to a printing machine with a subassembly couplable therewith and insertable therein.
A prevailing problem in printing machines is the recoupling of washing bars to a drive assigned to the printing machine after they have been removed temporarily from the printing machine for maintenance purposes. The washing bars are pushed through an aperture into the printing machine transversely to the printing direction. During the process, the pressman stands near the aperture which is formed in the operating side of the printing machine. The pressman has to push the washing bar into the printing machine with great care, because it is not possible for the pressman to monitor the coupling operation visually. The connecting elements for coupling are located on the drive side of the printing machine, the connecting elements being located opposite the aperture and, during coupling, being concealed by the washing bar in the viewing direction of the pressman. Damage to the connecting elements is not ruled out entirely, even when the pressman endeavors to push the connecting elements into engagement with one another very carefully.
The published German Patent Document DE 42 33 953 A1 describes a printing machine corresponding to the generic type mentioned in the introduction hereto. In the described printing machine, the subassembly is formed by a washing bar and a rotor of a dirty-cloth spindle of the washing bar. The dirty-cloth spindle is rotatable about the central axis thereof and is pivotable, together with the washing bar, about a pivot axis oriented parallel to the central axis. A drive for stepwise rotating the dirty-cloth spindle is arranged on a suspension device which is pivotable, together with the washing bar, about the pivot axis. Fastened to the suspension device is a guide body, whereon the washing bar is capable of being moved into the printing machine. The guide body is provided with an arm, to which there is fastened one clutch half of a clutch which serves for coupling the dirty-cloth spindle automatically to the drive when the washing bar is being moved in. The rigid connection of the clutch half to the guide body ensures that, when the washing bar is being pushed in, the other clutch half, which is fastened to the latter, always meets the clutch half, which is fastened to the arm, in an exact position relative to the latter. In the described printing machine, also, coupling therefore presents comparatively few problems, because the two clutch halves are arranged in axial alignment with one another.
For specific reasons, however, it is desirable to adopt a different construction from that described above. In particular, with regard to increasing the stability of the guide body, the latter should not be fastened to the suspension device, but instead, to the printing machine stand. In this possible construction, therefore, the suspension device would be movable relative to the guide body. Although the stability of this construction would be comparatively high, there would be a problem, inherent in the design, that, due to production tolerances, the position of the suspension device relative to the guide body may be slightly different whenever the washing bar is pushed in. The pressman, when pushing the washing bar in, would therefore have to manipulate it with particular care until the clutch halves are suitably aligned with one another without causing damage to one another. For reasons of economic production, too, there is a desire to adopt a different construction from that described in the published patent document, by making it possible to do away with the clutch quite completely, and to enable the coupling of the washing bar to the drive via other connecting elements.
The published European Patent Document EP 0 795 401 A1 describes a subassembly couplable to a printing machine and being in the form of a washing device with a washing brush. Arranged on a machine stand is a first clutch part operatively connected to a second clutch part which is arranged on the movable subassembly. The first clutch part arranged on the machine stand is freely movable and compensates for any possible bearing offset of the second clutch part which is arranged on the subassembly. The two somewhat platelike clutch parts accommodate supply lines for washing medium and water. The device is suitable for the releasable connection of supply lines of this type, but not for connecting a rotor to a drive, and therefore cannot make any contribution to solving the problem outlined hereinabove.
Further prior art is described in the published German Patent Document DE 197 37 783 A1.
SUMMARY OF THE INVENTION
It is accordingly an object of the invention to provide a printing machine with a subassembly couplable to and being insertable into the latter, wherein a guide provided for pushing in the subassembly is can be fastened to the printing-machine stand, and is user-friendly for the pressman, particularly with regard to avoiding damage to connecting elements during coupling.
With the foregoing and other objects in view, there is provided, in accordance with the invention, a printing machine with a subassembly couplable therewith and being insertable therein, the subassembly comprising a rotor mounted in a mounting which allows, in addition to a rotation of the rotor about a first axis, a pivoting of the rotor about at least one second axis which is oriented at an angle to the first axis.
In accordance with another feature of the invention, the at least one second axis is oriented obliquely or at an inclination to the first axis.
In accordance with an alternative feature of the invention, the at least one second axis is oriented perpendicularly to the first axis.
In accordance with a further feature of the invention, the mounting is a pendulum bearing.
In accordance with an added feature of the invention, the printing machine includes a drive external to the subassembly, for rotating the rotor, the subassembly, when being pushed into the printing machine, being couplable with the drive.
In accordance with an additional feature of the invention, the rotor is drivable by the drive via a releasable drive connection including a first connecting element fastened to the subassembly, and a second connecting element external to the subassembly.
In accordance with yet another feature of the invention, the mounting and the first connecting element are disposed at opposite ends of the subassembly.
In accordance with yet a further feature of the invention, the first connecting element is arranged coaxially with the rotor and is connected so as to be fixed against rotation relative to the rotor.
In accordance with yet an added feature of the invention, the second connecting element is fastened to an adjusting part of the printing machine, the adjusting part being movably connected to a stand of the printing machine.
In accordance with yet an additional feature of the invention, the connecting elements are two gear members of the drive connection for rotating the rotor, the gear members being axially offset with respect to one another.
In accordance with still another feature of the invention, the subassembly includes at least one centering device for orienting the adjusting part and the subassembly during insertion of the subassembly into the printing machine.
In accordance with a concomitant feature of the invention, the subassembly is a cleaning device, and the rotor is a cleaning roller of the cleaning device.
Thus, the subassembly of the printing machine according to the invention includes a rotor pivotable about at least one pivot axis which does not extend parallel to the axis of rotation of the rotor. When the subassembly is being pushed into the printing machine, therefore, a pivoting movement of the rotor about the at least one pivot axis compensates for a possible position offset which exists between two connecting elements serving for coupling the subassembly to the printing machine. For example, the mounting of the rotor may be constru
Colilla Daniel J.
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Locher Ralph E.
Stemer Werner H.
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