Abstract: Safety device for an infeed site of a web of material into a roller nip in a processing device on a printing press includes cover elements movably mounted on the processing device for nearly completely covering the infeed rollers in operating positions of the processing device.

Abstract: A liquid transfer device for rotary presses includes at least two cylinders which can transfer the liquid, especially ink, and at least one liquid transfer element intended to interact with the two cylinders in order to transfer the ink from one cylinder to the other cylinder. Each liquid transfer element can be displaced in an essentially circular path and come into essentially tangential contact with the cylinders.

Abstract: Offset printing cylinder is formed of a basic cylinder body and a printing cover disposed on an outer cylindrical surface of the cylinder body, the printing cover including a plurality of layers of which at least one is a heat-removing layer having a location selected from a group thereof consisting of a location intermediate two other layers of the printing cover and a location at the bottom of the printing cover.

Abstract: Ink duct of a rotary printing press, having two side walls between which an ink duct blade is arranged, each of the side walls being formed with an arcuate recess at a front end face thereof for bearing against an ink duct roller of the printing press, includes a deformation device disposed at each of the side walls for modifying a contour thereof defining the respective recess formed therein.

Abstract: A turner bar has a hollow space that can be connected to a compressed air source, for deflecting a printed web of material. Closable and openable air outlet openings are disposed on a turner bar jacket. When a web is present above the air outlet openings of the turner bar, a counterpressure that builds up below the web effects a displacement of a movable opening and closing element, in such a way that an air supply is released.

Abstract: A rotary printing press includes an inking unit with an ink fountain and an ink fountain roller. An ink fountain blade to be disposed in the ink fountain for scraping printing ink from the ink fountain roller includes a base body having a free end region to be associated with the ink fountain roller. The free end region has a plurality of slits formed therein for dividing the free end region zonally into a corresponding number of individual blades and defining zones of contact of the individual blades with the ink fountain roller. A hard-material coating is disposed on the base body in the zones of contact.

Abstract: Device for converting or changing a mode of operation of a paper-conducting cylinder of a folder having at the circumference thereof at least one element for operating on the paper conducted by the cylinder, a disc having a peripheral contour forming a control cam for at least one actuating element for generating a movement of the operating element, and a device for moving the control disc, independently of a drive therefor, so as to switch the mode of the paper-conducting cylinder between operating on the paper and not operating on the paper, includes at least one first adjustment element activatable axially and angularly by remote control for radially moving the actuating element, and at least one second adjustment element activatable by remote control for axially moving the control disc.

Abstract: Device for exchanging printing forms on a form cylinder in a printing unit of a rotary printing press, a holding device being provided in the printing unit for both holding therein at least one printing form which is to be installed, as well as at least one printing form which is being removed, includes profile members for guiding the printing forms substantially by lateral regions thereof.

Abstract: Device for connecting retaining elements and a crosspiece on a printing-form cylinder of a rotary printing press for fixing a flexible printing form to the circumference of the printing-form cylinder, a front edge of the flexible printing form being able to straddle a front edge of a gap formed in the cylinder, and a rear edge of the flexible printing form being fixable by at least one resilient retaining element mountable actuatably on the crosspiece and having a hook-shaped projection at an end thereof directed towards the circumferential surface of the printing form, includes a plurality of the retaining elements mountable alongside one another, and stop elements for form-lockingly locking the retaining elements on the crosspiece.

Abstract: Device for fixing a flexible printing form on a form cylinder of a printing press, the form cylinder having at least one axially extending slit formed therein, and at least one leaf-shaped element disposed in the slit, the leaf-shaped element having a rounded end portion for securing a bent portion of a flexible form, includes a tubular support wherein the leaf-shaped element is disposed so as to form a fastening element, the tubular support accommodating an actuating member capable of resiliently deforming the fastening element.

Abstract: Doctor blade for an offset rotary printing press having an inking unit with an ink duct wherein the ductor blade is provided for, respectively, scraping ink from an ink duct roller and zonally metering an ink film layer thereon over the width of a web of printing material includes a ceramic coating disposed on an edge portion of the blade at a region thereof at which the ink duct roller is in contact therewith.

Abstract: Folding apparatus having a main folder and an associated auxiliary cutting module for cutting into copies at least one longitudinally folded strip or web section originating from a web coming from a rotary printing press, the auxiliary cutting module having an inlet thereto for the at least one strip, and an outlet therefrom for respective copies cut from the at least one strip, the inlet and the outlet defining therebetween a straight travel path for the at least one strip and the copies cut therefrom, respectively, and a cutting cylinder having two angularly offset knives, and a counter-cutting cylinder, respectively, disposed on opposite sides of the straight travel path and of the at least one strip traveling thereon, the cutting cylinder and the counter-cutting cylinder, respectively, cooperating with one another for performing two successive cutting operations in one revolution of the cylinders.

Abstract: The present invention relates to a device for holding a printing plate on a plate cylinder in a rotary printing press, and to a rotary printing press including such a device. The printing plate, retained by an anterior edge on the external surface of the plate cylinder, is furthermore retained by fastening a posterior end fold onto a hook which can move, with respect to the plate cylinder between a front limiting position in which it forms a projection on the external surface to allow this posterior end fold to be fastened or unfastened, and a rear limiting position in which it is retracted with respect to this external surface and retains the printing plate in tension, in the wound state on this cylinder. The mounting and dismantling of the printing press are thereby facilitated, and the printing gap is reduced to a minimum.

Abstract: The invention relates to a device with an interchangeable leaf for holding a printing plate on a plate cylinder in a rotary printing press, and to a tool for dismantling the leaf. A leaf for fastening an edge of a printing plate onto the external surface of a plate cylinder penetrates into the latter via a slit and is mounted against a flat of a tension bar housed in the plate cylinder through the use of a passage receiving a end region of the leaf, of stop means for retaining the end region in the passage counter to movements other than the movement for extraction via the slit, and an elastic stop piece locking the end region by elastic clipping counter to such a movement but capable of being actuated by means of a flat tool inserted via the slit to release the end region. The mounting and dismantling of the leaf may thus be performed through the slit, without extracting the tension bar.

Abstract: A method and apparatus for damping bending vibration in a group of cylinders in a printing press is provided. In accordance with the method, the frequencies of the fundamental vibration modes are initially determined and then dynamic dampers are disposed so as to damp the vibrations. In accordance with the apparatus, at least one dynamic damper is disposed inside the envelope of a cylinder in the group of cylinders. It may be formed as a mass held elastically inside the envelope and having a vibration frequency that corresponds to the frequency of a fundamental vibration mode of the group of cylinders.

Abstract: A device for converting the function of a cutting/collecting cylinder (4) of a folding apparatus for rotary printing presses is provided. The cutting/collecting cylinder is convertible from a "collect" to a "non-collect" mode of operation and vice versa. Within the cutting/collecting cylinder (4) there is placed at least one group of pins (7), the pins (7) being disposed on a pin-bearing shaft (9) which can be actuated via a cam follower (41) rolling off on a cam body (27). The cam body (27) is adjustably mounted in a side wall (25) of the folding apparatus so as to be situated opposite a face side of the cutting/collecting cylinder (4). The relationship between the circumferential speed of the cutting/collecting cylinder (4) and the cam body (27) is changeable through a second power transmission element (34) which is coaxially movable and engageable with a first power transmission element (29) having at least two engagement areas (29a, 29b) .