Abstract: A perfecting sheet rotary offfset press has a top surface printing unit and a back surface printing unit each formed of an impression cylinder, and a blanket cylinder, a plate cylinder, and an inking mechanism which are disposed above or below the impression cylinder, respectively. The top and back surface printing units are connected through the impression cylinders constituting the respective printing units. A sheet is sequentially transferred by the respective impression cylinders of the top and back surface printing units, and printing is performed on the top and back surfaces of the sheet as it passes through the printing units. Thus, this perfecting sheet rotary offset press can print at high speeds and presents few printing faults, and its dimension can be made smaller.

Abstract: A device for temporary fluidic coupling between a source of pressurized fluid and a user member includes a supplied end-fitting and a supply end-fitting, at least temporarily placed face to face in a given longitudinal direction and connected respectively to the user member and to the source of pressurized fluid, wherein the supply end-fitting includes a retractable seal in the form of a longitudinal tubular piston which, when it is urged by the pressurized fluid, passes from a retracted rest position to an active position in which it is applied against a transverse annular face of the supplied end-fitting to connect the respective pipes in a sealed manner, and which resumes its retracted rest position when it is no longer urged by the pressurized fluid.

Abstract: A method of printing color images which includes the formation of a pattern of three primary color separated halftones of the image from a medium applied to a substrate. The medium is embossed to form a surface relief configuration on each halftone image. Each surface relief configuration reflects one specific primary color at a specific angle. In one embodiment, the medium is applied to a substrate in the pattern of color separated halftone images in a single printing pass by a composite offset printing plate. The medium is then embossed by an embossing plate to create the surface relief configurations thereon. In a second embodiment, the medium is applied to the substrate and embossed by a single plate in a single printing pass. In a third embodiment, the medium is applied to the substrate in a relatively continuous layer and thereafter embossed to simultaneously create a pattern of color separated halftones of the image and a different surface relief configuration on each halftone image.

Abstract: A control system for a web (10) in a printing press (12) having a device (20) for applying pressure to lateral locations of the web (10) intermediate side edges (22a and 22b) of the web (10), and a device (14) for controlling the pressure applying device (20) to apply a selected amount of pressure to the web (10).

Abstract: A drive disengaging device for a seal-type dampening system in an offset lithographic printing press. The disengaging mechanism includes a clutch gear rotationally mounted on a drive shaft and having a clutch bearing securely mounted thereto. The drive shaft incorporates a specified diameter, on which the clutch bearing functions as designed, and a stepped diameter, on which the clutch bearing does not function as designed. Alternate axial positioning of the clutch bearing between the specified diameter and the stepped diameter causes the clutch bearing to function or not function, respectively, as designed. Gear mesh between the clutch gear and the press drive train is maintained when the clutch gear is in either position. Axial positioning of the gear clutch assembly is controlled by the press operator through an actuator assembly. The actuator assembly can be either an axial-type or rotation-type, depending on the press configuration and space restrictions.

Abstract: A method for controlling the ink guidance of a printing machine, especially a sheet-fed offset printing machine. Ink-density spectra are recorded by means of a spectral photometer at a plurality of image points of the original and of the printed copy and the differential ink-density spectra are determined from these values. These differential ink-density spectra are then represented as a linear combination of the individual ink-density spectra of the inks participating in the composite printing. Regulating commands for the ink-guide members of the printing machine are thereupon derived from the proportionality factors of this linear combination.

Abstract: A guide device for moving sheet material in printing presses, which by means of blown air, presses the sheet material flat against the cylindrical surface of a transporting drum or a cylinder, essentially without any contact between the sheet material and the guide device. The guide device can have a guide plate which generates a stream of blown air in the direction opposite to the direction of travel of the moving sheet material.

Abstract: Method of controlling inking in a printing press, wherein the inking is evaluated in non-image areas during printing with a printing form on printing material, includes generating with at least one image-detecting device image signals in the non-image areas on the surface of the printing material, feeding the image signals to a control or regulating device and, with a temperature-controlling device, varying the temperature of ink applied to the printing form in accordance with the image signals.

Abstract: In the sheet-by-sheet printing process, a sheet is printed during its passage in the nip zone between a printing cylinder, which comprises on its periphery a rubber element, and an impression cylinder. The ink is supplied to the printing cylinder by an ink supply cylinder. In order to reduce the deformations of the printing dots, the ratios of the peripheral linear speeds of the ink supply cylinder and of the impression cylinder with respect to the peripheral linear speed of the rubber element of the printing cylinder are adjusted to values in the range of 1.004 to 1.05.

Abstract: In a web offset rotary printing machine having a printing tower with upper and lower portions defining a recess between them, and an interchangeable cassette lodged in the recess and supporting at least plate and blanket cylinders, the upper and lower portions are joined by an elevator mechanism so that the upper portion may be raised and lowered relative to the tower portion to accommodate the interchange of cassettes of different heights. A cassette is supported on transverse linear bearings on the lower portion, and helps support the upper portion when the latter is lowered onto it. The linear bearings allow a cassette to be slid in and out from either side of the machine. The cassettes may be of different heights, thus facilitating optimization of the cylinder arrangement in the cassette.

Abstract: The web-fed printing machine has two cylinders (2, 3) which form the nip, a paper-web-directing device (10) with an infeed roller (14) and a discharge roller (15), which are arranged adjustably on both sides of the nip (S), and an upstream web-feeding device (20), which likewise exhibits an infeed roller (22) and a discharge roller (23). In order to align the paper web, the web-directing device (10) can be displaced in a plane running through the axes of the rollers, and can be adjusted as a function of the signals from web-edge sensors (16, 17) such that it can be adjusted in the direction of the axes of rotation of the rollers and can be pivoted into an oblique position. The web-feeding device (20) can be pivoted about a stationary spindle (24) and is connected mechanically to the web-directing device.

Abstract: A printing device of the type for printing a strip-like printing article having a printing impression roller which is movable forwards while rotating in one direction and backwards while rotating in the opposite direction, along a line perpendicular to the direction of feeding a strip-like printing article is provided with a slide base which is slidable along rails which extend in a direction perpendicular to the direction of feeding of the printing article. Ink tanks and a roller train are mounted on the slide base. The roller train includes an ink fountain roller, a duct roller whose peripheral surface is in contact with the ink fountain roller, a stationary metallic roller whose peripheral surface is in contact with the duct roller, a first ink distribution roller whose peripheral surface is in contact with the metallic roller, and a second ink distribution roller whose peripheral surface is in contact with the first ink distribution roller.

Abstract: A thin-film forming apparatus which includes a printing device having an intaglio roll having a plurality of ink cells, an ink supply which includes a doctor blade and which fills ink into the ink cells, a printing roll with an elastic plate, to which the ink of the intaglio roll is transferred wound round the barrel surface thereof, and a printing table which fixes a to-be-printed material to which the ink of the printing roll is transferred, wherein the apparatus includes a articulated robot, and an implementation device for the printing preparatory works which is mounted to the arm of the articulated robot and which performs at least one operation among the mounting/dismounting operation of the elastic plate to/from the printing roll, the operation to wipe and/or dry the ink on the barrel surface of the intaglio roll, and the operation to wipe and/or dry the ink on the doctor blade.

Abstract: A method and a device for controlling the sheet inlet when starting up a sheet-processing printing machine having a vibrator-type inking unit, in which the sheets are positioned at front lays, their correct position is established and, in the case of the position having been established as correct, the sheet inlet is cleared at a particular machine position. The intention is to avoid the first entering sheet running into the printing machine in each case at different phases of the vibrator cycle in the case of a plurality of start-up operations. This is achieved according to the invention in that the first sheet is conveyed up to the positioning line, the feeder is then switched off and the sheet inlet is only cleared again when the vibrator gearing assumes a particular angular position.

Abstract: A motor-type ink sensor for detecting ink in a printing device of a printing apparatus is formed of an agitating part disposed in a position of an ink fountain formed in the printing device, a motor for driving to rotate the agitating part, and a control section for detecting ink from the driving condition of the motor.

Abstract: An ink fountain apparatus for a printing press includes an inclined member with an ink supply adjusting member which is swingable about an axis parallel with the rotational axis of an ink fountain roller for movement between a first position where ink fountain is formed and a second position where the ink fountain is not formed. Piston rods of hydraulic cylinders are connected to the inclined member via a connection mechanism to move the inclined member between the first position and the second position. Stoppers are also provided to stop the inclined member at the first position. Springs are included in the connection mechanism to press the inclined member against the stoppers. The spring force produced by the springs is smaller than the force produced by the drive means. With this structure, the work load of an operator can be reduced while enhancing the efficiency and safety of his work.

Abstract: An apparatus to apply a uniform coating to a gravure cylinder for imprinting upon a second surface, typically a web, is disclosed herein. The apparatus includes a feed bar, which controls the flow of the coating solution, and a supply box, which includes end dams, an overflow port, and a reservoir created by a baffle. With the overflow port and baffles a uniform coating of a composition is achieved without imperfections created by evaporation or foreign matter.

Abstract: A method of registering press plates on plate cylinders used in a sheet-fed press for multicolor printing, in which register information is obtained by using edges of the press plates as references. Each press plate is stretched around a plate cylinder with its front edge and one side edge abutted against gripping references on the plate cylinder. A press plate register measuring device similarly uses the edges of the press plate as references, with the press plate in the same positional relationship as on the press cylinder. On the measuring device deviations between references marks on the plates and benchmark references are measured and utilized to adjust the position of the plate cylinders to bring the printing plates into registered printing positions.

Abstract: An alignment monitoring device on rotary printing machines includes a plurality of installed components, respectively, having at least one alignment indicator applied thereto, the alignment indicator having equipment for indicating permissible tolerances for positional deviations of the respective installed component, and equipment for indicating positional deviations incurred by the respective installed component, and a device for protecting the alignment indicator against being manipulated.

Abstract: A pump unit for a printing machine comprises a base member and a plurality of pumps incorporated in the base member. Each of the pumps comprises a cylinder mounted to the base member and provided with a main bore closed at one end thereof and extending in an axial direction of the cylinder member and with suction and discharge ports, a plunger fitted in the main bore of the cylinder so as to always close another end of the main bore and to be reciprocal and rotatable therein, a variable speed motor mounted to the base member having an output shaft, and a transmission mechanism disposed between the plunger and the variable speed motor for transmitting an output of the variable speed motor to the plunger member. The transmission mechanism comprises an arm member mounted to the output shaft of the variable speed member and a connection member coupled at one end to the plunger member and at another end to the arm member through a spherical bearing.