Device for mounting and adjusting a metering roller in a finishing unit

#The invention relates to a finishing unit for a rotary printing press disposed up-line from a delivery, such a finishing unit including a form cylinder, a metering roller, and at least one applicator roller, and cooperating with sheet-guiding cylinders, side walls of the finishing unit being of multipartite construction and including swivel joints or hinges.

#German Published Patent Document DE 39 06 648 A1 discloses such an application or job unit for a printing press. The application or job unit is suitable for offset printing, gravure printing as well as for flexographic printing. Depending upon the respective printing method applied, it is necessary to transpose the doctor blade which wipes the surface of a dip roller and a jacket of a form cylinder, respectively, as well as to transpose the liquid-containing reservoir. However, this heretofore disclosed device does not permit a change from one fluid-conveying method to another fluid-conveying method while performing a given printing process.

#German Published Patent Document DE 34 27 898 C1 shows a device applying fluids, in particular a varnish coating unit for a printing press. Due to a partition or baffle plate formed with several communication channels and being immersed in a roller nip containing an ink supply, damping of vibrations of the ink supply and uniform distribution of the fluid supply is achieved. It is not possible to change over to a different fluid-conveying method, however, with the device according to the German Published Patent Document DE 34 27 898 C2.

#The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings, in which:

#FIGS. 1, 2 and 3 are diagrammatic views of various positions into which a metering roller is shiftable with respect to applicator rollers;

#FIG. 4 is an enlarged fragmentary view of FIG. 1 showing the position I of the metering roller;

#The metering roller 2 and the applicator rollers 4 and 5 are received in eccentrics 9, 10 and 11 of bearing brackets 15 and 16 and index plates 17 and 18 of trapezoidal surface area. Analogous to the configuration represented in FIG. 8, the bearing bracket 15 of FIG. 9 is rotatably connected to the index plate 18 at the swivel point or center of rotation 23, whereas the bearing bracket 19 and the index plate 17 are articulatedly connected to one another at the pivot point or center of rotation 19. Compared with the configuration shown in FIG. 8, the index plates 17 and 18 and the bearing brackets 15 and 16 of FIG. 9 are formed with oblong holes or slots 25 instead of circular index bores 21 and 22. The slots 25 are provided with clamping screws 24 by means of which the spacing or distance between the respectively used applicator roller 4 and 5 and the metering roller 2 can be determined, whereas the spacing or distance between the respectively not-used applicator roller 4 and 5 and the metering roller 2 can be kept variable.

#FIG. 10 shows the drive of the applicator rollers 4 and 5.

#A drive 27 which drives an intermediate gear 29 via a drive gear 28 is fastened to the side part or frame of the finishing unit 1. The intermediate gear 29 communicates the drive to a transfer gear 30 which is mounted on a journal of the applicator roller 5. Via a belt 32, a belt pulley 31, also mounted on the journal of the applicator roller 5, drives the applicator roller 4 on which there is provided a belt pulley 33. Via two pinions 34, a metering-roller gear 35 and thus the metering roller 2 are driven by the drive 27, it being also conceivable to drive the metering roller 2 by means of a sheet-guiding cylinder 26 and the form cylinder 3. When no sheets are conveyed, the metering roller 2 is moved by the drive 27 in order to ensure that the fluid to be applied is continually circulated.