Abstract: The present invention relates to a device for replacing elements of a product delivery fan wheel which is rotatably mounted. The fan wheel has a plurality of fan blades which include attaching devices for replaceably mounting fan blade tips on the fan blades.

Abstract: A printing unit includes rotating blanket cylinders (4, 5) and rotating plate cylinders (6, 7). Said rotating cylinders (4, 5; 6, 7) each have bearers (16) assigned to respective front sides thereof. Surface cleaning units (11) are assigned to respective surfaces (17, 34) of said bearers (16), said cleaning units (11) having quick clamps (21, 22; 27, 28) for quick clamping of wiper elements (12).

Abstract: A delivery for a sheet processing printing machine having a delivery housing and a sheet conveyor substantially enclosed by the delivery housing, the delivery housing being formed with an opening at the underside thereof through which, operationally, sheets leave the delivery housing for forming a sheet pile, and a suction line connected to the interior of the delivery housing, the suction line having a negative pressure prevailing operationally therein, includes motor-driven fluid flow machines for acquiring air flows leaving the delivery housing through the opening and for generating air flows returning into the delivery housing.

Abstract: An improved transport device for transporting signatures from a continuously moving saddle chain has a first pair of belts arranged opposite to each other. A signature moving with continuously speed on a saddle chain is gripped between the pair of belts and accelerated away from the saddle chain to a working station.

Abstract: A method and apparatus for automating input of parameter changes on a printing press. At least one sequence of parameter change inputs is recorded and stored in a predetermined file. Later, the file may be called up and the recorded sequence of parameter change inputs played back so as to automatically control the printing press. Operational consistency and operator convenience are enhanced.

Abstract: A method for laterally aligning a sheet in a sheet-processing machine, the sheet being retained by sheet grippers which are displaced axially on a common carriage with respect to an alignment cylinder, includes fixing the carriage when it reaches a predetermined desired position; and device for performing the method.

Abstract: A continuous process for manufacturing a gapless tubular printing blanket comprising the steps of continuously forming a tubular sleeve in a sleeve forming station; continuously moving the tubular sleeve axially from the sleeve forming station through a print layer forming station and continuously applying a print layer over said tubular sleeve as it passes through said further print layer forming station to form a gapless tubular printing blanket of indeterminate length. In accordance with one embodiment, the tubular sleeve is rotated as it moves axially from the sleeve forming station through print layer forming station. In accordance with another embodiment the the tubular sleeve is not rotated (i.e. it remains rotationally fixed) as it moves axially from the sleeve forming station through print layer forming station.

Abstract: A folder for a rotary printing press, having at least one copy-guiding cylinder and, on the one copy-guiding cylinder, gripping devices for gripping one end of a copy, includes a cutting cylinder cooperating with the one copy-guiding cylinder, and copy-guiding devices provided on the cutting cylinder, the gripping devices of the one copy-guiding cylinder and the copy-guiding devices of the cutting cylinder being retractably and extensibly movable substantially parallel to normals to axes of rotation of the one copy-guiding cylinder and the cutting cylinder; and a method of operating the folder.

Abstract: A printing sleeve removal device has at least one band for wrapping around at least part of a printing sleeve and a tightening device connected to the at least one band for tightening the at least one band. Also provided is a method for axially removing a printing sleeve including placing a sleeve removal device over the printing sleeve, tightening the sleeve removal device so as to grasp the sleeve, and axially pulling on the removal device so as to axially remove the printing sleeve.

Abstract: A printing press drive system includes at least one drive having a motor with an external rotor equipped with permanent magnets, the one drive being assigned to at least one cylinder of the printing press for driving the cylinder, and with a stator provided with windings and firmly fixed to the side panel of the printing press, at least part of the drive system being implemented via a gear train, and the rotor having a gear rim at a perimeter thereof.

Abstract: A sheet transport system for a rotary printing press, including a sheet transport device having a sheet holder, and a first and a second propulsive drive element for propulsively driving the sheet transport device guidingly in a first and a second guide rail, respectively, the second guide rail extending substantially parallel to the first guide rail, the first and the second propulsive drive elements forming rotors of an electric linear drive, the first and the second guide rails having a plurality of drive stations disposed thereon and forming a stator of the linear drive, and a control device assigned to the drive stations for controlling and regulating movement of the first and the second propulsive drive elements, each of the first and second propulsive drive elements being a structure formed of magnetizable material, at least part of which is movable relative to another part thereof, and the drive stations being spaced from one another, at least in some sections of the sheet transport device, a distance

Abstract: A method for eliminating rhythmic register errors in sheet-fed rotary printing machines, the sheets therein being transported by an impression cylinder of double size having two gripper arrangements, includes bringing front lays, which have been provided for orienting the sheets at a feed table, out of an end position outside a conveying plane of the sheets and into a first orientation position on the feed table, then bringing the front lays back into the end position, and thereafter bringing the front lays into a second orientation position on the feed table; and a device for performing the method.

Abstract: An offset printing press for printing a web, the press comprising a frame, a first plate cylinder movably mounted in the frame, and a first blanket cylinder in selective contact with the first plate cylinder. A second blanket cylinder for forming a nip with the first blanket cylinder is in contact with a second plate cylinder. The press has a first operative condition wherein the first plate cylinder and the first blanket cylinder are in direct contact to permit double-sided printing on the web, and a second operative condition wherein the first plate cylinder and the first blanket cylinder are separated to permit a plate change on the first plate cylinder while the web is printed by the second blanket cylinder.

Abstract: The present invention is related to a printing unit including a frame (2) and an upper plate cylinder (12) mounted in the frame (2). An upper blanket cylinder (16) is in selective contact with the upper plate cylinder (12), and a lower blanket cylinder (18) forms a nip with the upper blanket cylinder (16). A web (8) passes through the nip. A lower plate cylinder (14) contacts the lower blanket cylinder (18). Impression setting means (60, 62, 82) are assigned to movable housings (40, 44) of the movable cylinders (12, 14, 16). The impression setting means (60, 62, 82) are provided to adjust forces exerted on bearers (20) of the printing unit cylinders (12, 14, 16).

Abstract: A method of operating a printing machine including an inking unit having a vibrator roller oscillatable reciprocatingly between an ink-duct roller and an inking-unit roller for making intermittent contact with the rollers, includes selectively operating the inking unit in a normal operating mode and in at least one reduced-ink operating mode wherein the ink-duct roller rotates with a movement characteristic different from that of the normal operating mode; a control method for the operating method; and a device for performing the operating method.

Abstract: A rotation-angle measurement for printing presses with at least one marking (2) arranged on a rotating element (1) and at least one sensor (3,4) which detects marking (2). The at least one marking (2) extends along the entire circumferential path (5) and is arranged on the element (1), the position of which is to be determined.

Abstract: The present invention is related to a gripper having a stationary gripper member and a movably mounted gripper member being relatively movable toward said stationary gripper member. An actuating member extends through the stationary and the movable gripper members respectively. Cam surfaces are assigned to said pretensioned actuating member being contacted by contacting members causing the gripper members respectively to close upon removal of external forces.

Abstract: A signature gripper having a gripper pad for firmly gripping a signature; a gripper base connected to the gripper pad, the gripper pad being rotatable about the gripper base in a direction of rotation; and a spring acting in the direction of rotation to permit rotation of the gripper pad about the gripper base and connected to at least one of the gripper base and gripper pad. The spring damps deceleration experienced by the signature upon gripping.

Abstract: A circuit arrangement for the level conversion of binary signals in a control system of a printing-technology machine, includes a component for transmitting a signal and a component for receiving the signal, the signal-transmitting component having an element for generating a binary level value, and a window discriminator provided between the signal-transmitting component and the signal-receiving component, the window discriminator having a lower threshold value and an upper threshold value corresponding to binary level values, the window discriminator further having a signal input and a signal output, the signal input being connected to an output of the signal-transmitting component, the signal output of the window discriminator being connected to an input of the signal-receiving component, the signal input being at a level lying between the lower and the upper threshold values when the element of the signal-transmitting component, for generating a binary level value, is not driven.

Abstract: A printing unit of a rotary printing press for using various ink types, particularly water-based inks, is provided. The printing unit includes an inking mechanism, a print cylinder, and a blanket cylinder. The inking mechanism and the cylinders are mounted in side walls of the printing unit. A housing at least partially surrounds the inking mechanism and the cylinders to maintain a surrounding atmosphere within an at least semi-enclosed area of the printing unit. A chemical agent may be selectively added to the atmosphere in the semi-enclosed area to reduce the rate of evaporation of a substance in the ink. The printing unit also includes a cooling unit for maintaining an ink carrying surface of one or more of the print form, the printing blanket, and the inking unit at a predetermined temperature which is suitable for printing with water-based inks. The printing unit may be a sheet-fed printing press.