Abstract: An ink duct for a rotary printing press wherein all or some of the surfaces of the ink duct are permanently coated with a substance which has a low surface energy of between 10 and 60 mN/m. As well as enabling the ink duct to be cleaned easily, the blending of the printing ink is improved owing to the reduced frictional resistance of the coated parts, which in turn leads to more uniform use of the ink-metering roller.

Abstract: A sample of printing ink for a printing press is obtained using actual press components. An anilox roll for the press is supplied with ink and is rotated while the anilox roll is either mounted on the press or mounted off-line from the press. A printable substrate is printed with the ink either by pressing the substrate directly against the anilox roll or by pressing a transfer roll against the anilox roll and pressing the substrate against the transfer roll. The ink on the substrate is inspected, and any necessary changes to the ink are made before the press run is started.

Abstract: Disclosed is a blanket for an offset printing, comprising a metallic sleeve, a base layer formed on the metallic sleeve, a compressible rubber layer formed on the base layer, an inextensible layer formed on the compressible rubber layer, and a surface rubber layer formed on the inextensible layer, wherein the inextensible layer consists of a thread that is compressed in advance to 90% to 50% of the original thickness and wound about the compressible layer.

Abstract: A central impression printing press (20) utilizes a plurality of quick change print stations (100, 200, 300) to increase safety and print quality. The print stations (100, 200, 300) include movable carriages (102, 202, 302) which mount anilox rolls (40) and meter rolls (38). The carriages (102, 202, 302) roll on guide track assemblies (104, 204, 304) and are locked in operative positions by lock mechanisms (106, 206, 306) utilizing lock arms (1100, 316) with progressive engagement surfaces (1106, 318). The carriages (102, 202, 203) have anilox roll mounts (132) and mounting slots (134) which allow the anilox rolls (40) and meter rolls (38), respectively, to be simply lifted off the carriages (102, 202, 203). The anilox rolls (40) are driven by engagement of a shear pin (160) which shears off if foreign matter becomes caught in the rolls. The press (20) also uses an upstream doctor blade (1126) used on the upstream print station (102).

Abstract: In an inking system of a rotogravure printing press there are included an ink reservoir, an ink doctor blade device and an ink catch reservoir. All of these components of the inking system are height-adjustable with respect to the formed cylinder of the printing machine.

Abstract: According to the stencil making and attaching method of a printing device of the present invention, independent of variations in the detection of the stencil sheet set position detection sensor and variations in the clamped state due to curled stencil sheet, etc., it is possible to always set the image-formation start position of the stencil sheet at a regular position with respect to the drum rotation position, and consequently to improve the positional precision of the printing operation.

Abstract: A printing machine which allows for the economic production of multi-color prints and allows for automation of the printing process is provided. The printing machine according to the collect-run principle in which the multicolor prints are collected on a rubber cylinder. In a single printing unit, the printing machine can also process two different printing inks. To execute the collect-run printing operation, the sheets are fed in a cycle offset to the collection of the images on the rubber cylinder. This enables very compact and simply structured printing machine configurations.

Abstract: An inker unit for a printing unit of a web-fed rotary printing press has a pair of ink application rollers in direct contact with a forme cylinder and with a central, ink receiving roller. A pair of inking rollers are also in direct contact with the ink receiving roller, and in indirect contact with the ink application rollers through riding rollers. The ink application rollers are thus inked both directly and indirectly from the ink receiving roller.

Abstract: The density or size of an ink roll, which is formed in an ink fountain of a rotary printing press, is determined either directly or indirectly at several spaced locations. The measured values are then evaluated. A signal is generated to an ink feed device, or a warning signal can be transmitted in accordance with the size or density of the ink roll and its deviation from reference values.

Abstract: A reusable printing plate for recess or relief printing. The reusable printing plate features a number of adjacent printing cells, each of which can be independently alternated between a printing mode and a non-printing mode. In the printing mode the printing cell acquires a configuration for receiving and retaining a printing substance. In the non-printing mode the printing cell acquires a configuration which does not receive and retain the printing substance.

Abstract: An ink duct is used with an ink-metering roller of a printing press. The ink duct includes doctor blades and is shiftable for pivoted movement between a working position and an emptying position with at least one of the doctor blades remaining in contact with the ink-metering roller. When the ink duct is in the emptying position, any printing ink in the ink duct is collected in a very low ink collection channel.

Abstract: A continuous image transfer belt which is useable in a variable image size offset press system and which is adapted to permit the press to print a variety of different sized printed matter is provided. The image transfer belt includes at least one base ply, at least one layer of a compressible material over the base ply, and a surface ply over the layer of compressible material. Preferably, the belt is continuous. The belt is used in an offset printing system having the capability to print variable-sized images. The system includes a source of ink; at least one plate cylinder and a replaceable sleeve for the plate cylinder, and a printing plate which is adapted to receive ink from the ink source.

Abstract: An inking device comprises an ink fountain device including a blade provided so as to be movable toward and away from a circumferential surface of an ink fountain roller, a pair of side plates provided in both side end portions of the blade, and a holder for supporting the blade and the pair of side plates. The ink fountain device is supported on an ink fountain support member so as to be movable along an axial direction of the ink fountain roller. The ink fountain support member extends along the axial direction of the ink fountain roller. The side plates are always urged toward the ink fountain roller by compression springs, and are pivotably supported, so that the side plates are automatically brought into intimate contact with the circumferential surface of the ink fountain roller.

Abstract: An ink fountain with an ink-duct roller in the inking mechanism of printing presses, with a device for filling printing ink into the ink fountain, is described. The device for filling ink is mounted on a sled so that it can be moved back and forth in the longitudinal direction of the ink fountain. A sensor is fastened to the sled, and when the ink level is too low, the sensor controls the ink feed. Thereby, a precise regulation of the amount of ink added can be achieved by means of a downstream dosing device.

Abstract: An endotracheal tube-holder assembly that includes an arcuate track member and a pair of face plates mounted at the free ends thereof for engaging the opposite sides or cheeks of a patient's face, and wherein an adjustable holding block assembly is slidably mounted on the track member which defines a support housing that includes a tube holding block and a bite block support in which a removable bite block is mounted.

Abstract: For moistening a water roller in contact with a planographic printing plate on a plate cylinder in an offset printing press, a sprayer produces a more or less flat spray of dampening water. Baffles are positioned in front of the sprayer to define an aperture through which the spray travels before hitting the water roller. The aperture has a width shorter than the longer dimension of the cross section of the spray as measured in a plane containing the aperture, and longer than the shorter dimension of the cross section of the spray in the same plane. Thus the rate at which the dampening water is supplied to the water roller is infinitely variable by changing the angular position of the spray relative to the aperture between a minimum dampening position where the spray has the opposite longitudinal end portions of its cross section interrupted to the utmost by the baffle means and a maximum dampening position where the spray is allowed wholly through the aperture.

Abstract: The present invention is directed to preventing image damage caused by pressure applied to print media during a folding process, by using pressure and abrasion resistant inks only on those sections of print media that are subjected to pressures that would otherwise damage the images printed on those sections. Images on other sections of the print media are printed using less expensive or general purpose inks.

Abstract: There is provided a flexographic ink feeding apparatus in which a part of a chamber into which ink is fed is defined by a blade mounting plate and blades, characterized in that a junction of the blade mounting plate and the blade is formed so as to make an obtuse angle.

Abstract: The fan-out effect of a paper web, passing through a web-fed printing press having a plurality of printing units, is corrected by providing control assemblies before selected ones of the printing units. The control assemblies each have a number of control elements and counter control elements. The number of control and counter control elements in each assembly varies with the moisture content of the paper web passing through the web-fed printing press.

Abstract: A roll paper loading mechanism 2 for a printer 1 has a slide frame 25 attached to a cover frame 23, which opens and closes a top opening 22b. This cover frame 23 pivots open and closed in conjunction with the opening and closing of a cover frame 28. A platen roller 26 is held on an end of the slide frame 25 in a manner enabling the platen roller 26 to turn. After the top opening 22b to the roll paper holding unit is closed by the cover frame 23, the other cover frame 28 can pivot independently. This independent pivoting motion of the cover frame 28 causes the slide frame 25 to slide forward to a position at which the platen roller 26 is positioned to an opposed position with a constant gap to the print head 8. This arrangement increases the sliding distance of the slide frame 25, and thereby reduces the pivot radius needed to fully open the top opening 22b. As a result, the area above the top opening 22b can be efficiently used to position some other component.