Abstract: The present invention discloses an accurate digital ink supply method for a printing press. The present invention adopts metering-type ink delivery units to replace the ink keys of the traditional printing press, and the metering-type ink delivery units directly deliver the ink to the corresponding ink zones on the metering basis of either volume or mass, realizing the quantitative supply of ink to each one of the ink zones. The present invention can perform accurate adjustment in real time, is high in automation and digitalization degree and large in adjustable range, realizes one-way ink delivery and avoids ink return.

Abstract: A color control system for use in a printing press is provided. The system includes a controller for reviewing digital data for a print job and identifying solid color regions of the print job that are greater than a predetermined size, a user interface allowing an operator to select solid color regions identified by the controller, a sensor for measuring a characteristic of the selected solid color regions of the print job on a printed substrate, the controller determining measured values of the characteristic for each of the selected solid color regions, and at least one inking unit for supplying ink in a plurality of ink zones to a plate cylinder, the controller varying the ink supplied to ink zones including the solid color regions as function of a difference between the measured value of the characteristic of each selected solid color region and a predetermined target value of the characteristic. A method for controlling printing of a printing press is also provided.

Abstract: The invention provides a radiation-curable polymerizable composition of the invention having (a) a hindered amine compound having no nucleophilic moiety in a molecule, (b) a photo-acid generating agent and (c) a cationic polymerizable monomer. The invention further provides an ink composition formed of the radiation-curable polymerizable composition, a method for ink jet recording having: ejecting the ink composition onto a recording medium by using an ink jet recording apparatus and irradiating the ejected ink composition so as to cure the ink composition, and a printed material obtained thereby. The invention further provides a method for forming a planographic printing plate having: ejecting the ink composition onto a hydrophilic recording medium by using an ink jet recording apparatus; and irradiating the ejected ink composition so as to cure the ink composition for forming a hydrophobic region, and a planographic printing plate obtained thereby.

Abstract: In an initial state, a key control switch for adjusting opening degrees of ink keys and a display changeover switch are displayed on a display screen of a touch sensitive control panel. The key control switch is a collection of key control switches individually arranged in areas corresponding to the ink keys, and for each ink color. The individual key control switches indicate color densities of control strips on a print measured by a color density measuring device and the opening degrees of the ink keys. When the changeover switch is operated in this state, the control panel simultaneously displays the key control switches and an image of the print being processed.

Abstract: A web-fed printing machine is provided. The printing machine includes a plurality of printing units. A first work station precedes the printing units. A second work station follows the printing units. At least one lifting device is assigned to the printing units for transporting printing unit modules. The lifting device is movably mounted on a top side of the printing units.

Abstract: A controller for motor activation providing accurate and repeatable position changes by pressing and releasing a push button switch. Repeatable position changes are made in an advance direction by triggering a digital counter for a predetermined number of cycles of a reference clock signal. Backlash in retard motion of the motor is reduced by similarly asserting a retard motor input for an amount of time determined by another digital counter with a following advance correction made automatically after the retard signal is applied, by applying a predetermined retard-advance movement amount, as again counted by a digital counter. The advance binary amount, the retard binary amount and the retard-advance binary amount of set through binary switch inputs to respective counters to count the respective time periods (TG3, TG1, and TG2).

Abstract: A photosensitive device has a cylinder, a photosensitive sheet slidably wrapping outer surface of the cylinder, and a feeding roller in the cylinder. The feeding roller feeds the photosensitive sheet to the outer surface of the cylinder sequentially. The photosensitive device also has a winding roller in the cylinder. The winding roller rolls the photosensitive sheet sequentially from the outer surface of the cylinder. The photosensitive device also has an adjusting member for adjusting contact force emerged between the cylinder and the photosensitive sheet.

Abstract: A belt drive cantilever tensioner. The tensioner is particularly suited to belt drive systems having a high belt tension. The tensioner comprises a pulley journaled to a cantilever arm. The cantilever arm is pivotably attached to a mounting surface by a fastener at a pivot. The cantilever arm further comprises a hole disposed radially from the pivot for containing an embedded resilient member. A second fastener extends through the resilient member fixing it in a position relative to the first fastener. A load applied to the pulley causes the arm to pivot thereby causing a lever action to exert a force upon the resilient member. The resilient member has a limit of movement as well as an asymmetric force characteristic which increases in proportion to an arm rotation.

Abstract: At printing time, a blanket cylinder gear is meshed with a plate cylinder gear, whereby a first plate cylinder is rotatable by a drive motor. At image-recording time, the blanket cylinder gear is separated from the plate cylinder gear. In this state, a different motor drives the plate cylinder gear to rotate the first plate cylinder at low speed.

Abstract: In an initial state, a key control switch for adjusting opening degrees of ink keys and a display changeover switch are displayed on a display screen of a touch sensitive control panel. The key control switch is a collection of key control switches individually arranged in areas corresponding to the ink keys, and for each ink color. The individual key control switches indicate color densities of control strips on a print measured by a color density measuring device and the opening degrees of the ink keys. When the changeover switch is operated in this state, the control panel simultaneously displays the key control switches and an image of the print being processed.

Abstract: A rotary offset printing press which has a series of printing units of identical make through which a web of paper is threaded. In each printing unit the blanket cylinder is made displaceable into and out of printing engagement with the plate cylinder and the impression cylinder. The cylinders of each printing unit are driven from a separate variable-speed motor via a train of gears which stay intermeshed whether the blanket cylinder is in or out of printing engagement with the other cylinders. A clutch is inserted between the drive linkage and the impression cylinder for connecting and disconnecting the latter to and from the former. A plate change is possible in any of the printing units by moving the blanket cylinder out of printing engagement with the plate cylinder and the impression cylinder, and declutching the impression cylinder from the drive linkage, in that printing unit while the other printing unit or units are in continuous operation for printing the web.

Abstract: A nine-cylinder satellite printing unit includes printing stations having a first, second, third and fourth transfer cylinder which a web passes through. The transfer cylinders are capable of being stopped when the printing assembly is switched off. A distance between each of the first and second transfer cylinders, the second and third transfer cylinders, and the third and fourth transfer cylinder is shorter than the distance between the first and fourth transfer cylinder. A guide roller keeps a supplied portion of the web away from the first transfer cylinder and another guide roller keeps a discharged portion web away from the fourth transfer cylinder when the first and fourth printing cylinders are respectively in print thrown-off positions.

Abstract: A multicolor lithographic printing press utilizes a blanket member having a release surface with a transfer rate approaching 100%. This facilitates a press design utilizing a single blanket member to transfer multiple colors of ink onto a recording medium.

Abstract: The present invention relates to multicolor pad printing and, in particular to methods for printing a copy of a high quality multicolor image onto a substrate. The present invention is also concerned with objects having thereon a printed full-color process image of a high definition. The present invention provides a significant improvement upon known multicolor pad printing methods by combining known pad printing technologies with full-color printing process technologies. The method of the invention is very versatile and highly desirable since it allows for the first time to pad-print halftone multicolor images onto spherical, rounded, cylindrical and other unconventional shapes and surfaces.

Abstract: A plate making apparatus of a flexible plate material 13,22 being placed on a plate cylinder 7 for executing planographic printing in multiple colors. The plate making apparatus has a cutter 23 being placed between a storage section 21 of a roll-like plate material and an exposure section 25 for cutting the roll-like plate material like a sheet and punch means 30 for making plate cylinder engagement holes 14a and 14b in the left and right margins of the plate material along the transport direction thereof, the plate cylinder engagement holes to be engaged in protrusions 7a and 7b disposed in the circumferential direction of the left and right margins of the plate cylinder. Accordingly, it is possible to provide a plate making apparatus which reliably holds a plate material on a plate cylinder for enabling planographic printing and can use a roll-like plate material.

Abstract: The ink to be impregnated into the figure portion 6 of the processed stamp plate 10 in the stamp device 11 is formed of polyoxyethylene-alkyl-phenyl ether and oil soluble dye melted therein and regulated to have the viscosity in a range of 300-2000 cps, more preferably, 500-1500 cps. This stamp device 11 can thus extremely improve all of stamping characteristics, i.e., stamping durability, ink spreading condition, ink seeping condition, ink permeation speed, and the number of trial stamping times.

Abstract: A surface for the transfer of a viscous liquid product to a support including a substrate having a surface to which are grafted distinct zones of at least one material. The materials may be an anti-adherent material, a hydrophilic material, and a hydrophobic material to impart to the surface a heterogeneous structure improving the quality of transfer of the liquid product, such as ink, to a support. This transfer surface may be an offset printing blanket for printing ink on paper.

Abstract: A method for forming or marking register marks used for the automatic registration between a plurality of printing plates in a printing press. A register mark forming or marking device is mounted on a printing frame of an automatic composer so that a register mark can be formed or marked on a printing plate simultaneously with the printing of a film original over the printing plate. Misalignment between the thus formed or marked register marks and patterns or images can be eliminated.

Abstract: A desensitizing ink for wet offset printing on the acceptor surface of a chemical duplicating set of superimposed sheets where one of the sets has an electrophilic acceptor coating and the other a nucleophilic coating for producing a chromogenic reaction wherein the nucleophilic desensitizing ink contains an alkoxylated nucleophilic compound which permits a continuous ink transfer to the water repellant zones of the wetted impression plate of an offset press and simultaneously neutralizes the corresponding zones of the acceptor surface.

Abstract: A novel set of basic printing inks for producing improved color tones in multicolor printing comprising four individual inks of golden-yellow, carmin, violet, and turquoise hues, respectively, and having predetermined spectral intervals between their maximum density wavelengths, the maximum density of each of the intermediate pair of colors being substantially equidistant from the middle of the visible color spectrum.

Abstract: A combined lithographic/flexographic printing process having a plurality of successive printing stations for printing color images on a substrate in a continuous in-line process. One of the stations prints a first color image using the flexographic process and at least one of the successive printing stations prints a second color image over the first color image using an offset lithographic process in the continuous in-line process.