Abstract: A method is provided for setting a layer thickness of a covering coating material to be applied to a substrate by an application device. The coating material is applied to the substrate in a printing machine or in a paper-processing machine. The coating material is applied at various points on the substrate by the use of the application device in a machine process. At each of at least one first point on the substrate, the coating material is applied in a grid having a plurality of grid points, and at each of at least one other second point on the substrate, the coating material is applied over the full area. Each first point on the substrate forms a grid zone and each second point on the substrate forms a solid zone. A control unit connected to a sensing device determines respective values of the optical density of the layer of the coating material applied on the points on the substrate using data captured by the sensing device at the first and second points on the substrate.

Abstract: A method is provided for printing on hollow bodies in which the hollow bodies are printed on in a decorator having a rotating segment wheel. Printing ink provided by multiple different plate cylinders and inking units are each collected on printing blankets arranged one after another on the circumference of the segment wheel. The plate cylinders and inking units involved in the printing are arranged and set in such a way that, when printing on the hollow body, an iris print is, or at least can be implemented.

Abstract: A reflected light amount from a patch under a first light source is acquired, and a reflected light amount from the patch under a second light source whose wavelength band is different from the first light source is acquired. The type of a printing medium on which the patch is printed is determined based on the ratio of the two acquired reflected light amounts.

Abstract: The invention concerns a printing unit comprising a cylindrical bed (1), an anilox roller (3) for transferring ink to the rotating bed (1), and a counterpressure roller (2) which presses printed material (4) against the bed (1), the axes (11, 13) of the anilox roller (3) and of the bed (1) being tilted relative to one another.

Abstract: An inking device of a numbering and imprinting machine includes: a numbering unit provided on an outer peripheral portion of a numbering cylinder and configured to print a code onto a transported sheet; a partition member configured to partition the inside of the ink fountain such that inks are stored divided by their colors inside the ink fountain; an ink fountain roller configured to draw out the inks stored in the divided manner inside the ink fountain, such that the inks appear side by side in the roller axial direction; select rollers onto which the inks fed from the ink fountain roller are transferred, respectively; oscillating rollers onto which the inks fed from the select rollers are transferred, respectively; and form rollers configured to rotate such that convex portions thereof, onto which the inks fed from the oscillating rollers are transferred, come into contact with the numbering unit.

Abstract: A printing machine in which automatic supply of ink from different types of ink container to the ink fountain is possible, and in which further automation of replacement procedure, simplification of replacement procedure, and reduction of time required for replacement procedure are achieved is provided. The printing machine comprises an ink fountain member 2 having fountain-forming faces forming an ink fountain 1; an ink fountain roller 3 for applying an ink to the outer peripheral surface through an ink channel between the ink fountain roller 3 and the ink fountain member 2; a plurality of rollers 4, 15 for supplying the ink applied to the outer peripheral surface of the ink fountain roller 3 to a printing portion; a plurality of ink containers 65, accommodating different types of ink, and being stored in a predetermined container storage unit 66; and an ink supply device 68 for holding the desired ink container 65 and supplying the ink therein to the ink fountain 1.

Abstract: A digital flexography system includes an imaging member with a charge generating layer formed from an array of addressable pixels and a charge transport layer thereon. Ink is delivered to the imaging member using a simple rough donor roll, rather than an anilox roll. Instead of controlling the amount of ink delivered using the anilox roll, the amount of ink is controlled by the pixels on the imaging member.

Abstract: An apparatus for metering printing ink includes an ink fountain roller, an ink fountain and a mounting for the ink fountain. The mounting permits an adjustment of the ink fountain relative to the ink fountain roller. The mounting has at least one elastic element for generating a holding force. The mounting is configured in such a way that a force flux which results from the holding force deflects the ink fountain roller in such a way that its longitudinal outer contour is adapted to the longitudinal outer contour of the ink fountain. A printing press having the apparatus is also provided.

Abstract: A method of controlling the ink feed to a printed substrate in a lithographic printing press is provided which includes providing, for each of a plurality of ink zones, an ink coverage requirement for a printing unit of the lithographic printing press; color scanning a first ink zone of a plurality of ink zones on a printed substrate as it exits the printing unit of the lithographic printing press; calculating, for each one of the plurality of ink zones, a dynamic flow change based on the static flow change for said each one of the plurality of ink zones and the ink coverage requirement for said each one of the plurality of ink zones; and providing a flow setting for each one of the plurality of ink zones based on the dynamic flow change for said each one of the plurality of ink zones.

Abstract: A doctor-type ink fountain includes a rear wall and a row of flow profiles provided along the rear wall. The flow profiles are obliquely aligned at an acute angle relative to an axis of rotation of a screen roller interacting with the doctor-type ink fountain. A printing press having the doctor-type ink fountain is also provided.

Abstract: A printing unit contains a dampening unit and an inking unit which includes a screen roller with a circumference and an ink applicator roller with a circumference and a gap having an arc length or curve length, the ink applicator roller resting against the screen roller. The circumference of the screen roller and the circumference of the ink applicator roller and the arc length or curve length of the gap are dimensioned in predetermined proportions relative to each other so as to avoid ghosting.

Abstract: A method of on-press development of a lithographic printing plate having an imaged photosensitive (PS) coating by (a) applying an emulsive film of press ink and fountain onto the entire PS coating; (b) transferring all nonimage areas of the inked PS coating and all of the ink film on the nonimage areas of the PS coating from the plate to a blanket roll while the image areas of the PS coating remain on the substrate, wherein the nonimage areas are transferred to the blanket roll in particulate form without dissolution or dispersion in any ink or fountain; and (c) contacting the blanket roll with a paper leader to further transfer all the ink, fountain water, and particles of nonimage PS coating that were transferred to the blanket roll, from the blanket roll to the paper leader.

Abstract: A printing unit of a rotary printing press includes a forme cylinder. An inking unit interacts with the forme cylinder and has a plurality of inking rolls. A dampening unit also interacts with the forme cylinder and has a plurality of dampening rolls. A washing device interacts with at least one of the inking rolls and dampening rolls for washing the inking unit and/or the dampening unit. The inking unit includes a plurality of ink applicator rolls which can be placed directly onto the forme cylinder during printing operation. The dampening unit has at least one dampening rotation applicator roll that can also be placed directly onto the forme cylinder during printing operations. In a washing position, one of the plurality of ink application rolls and the dampening rotation applicator roll are brought directly into contact with each other.

Abstract: A digital offset inking system includes an ink chamber that contains ink, and deposits ink onto an inking member. Excess deposited ink is removed from the surface of the inking member. The inking member transfers the ink directly to a conformable surface of an imaging member.

Abstract: Flexographic printing using a processor to apply a control value to an ink pumping and control system responsive to the control value, where the control value sets an operating mode of the ink pumping and control system, where the ink pumping and control system includes a stepper motor coupled to a peristaltic pump. Ink is pumped through the rotary coupling into a rotating diffusion cylinder and metered through a plurality of passages so as to contact a permeable membrane covering the diffusion cylinder. A dual blade assembly cleans the permeable membrane and ink passing through the permeable membrane is metered onto a printing plate or printing sleeve.

Abstract: A printing machine in which substantial automation of the replacement procedure is achieved, and thus significant simplification of replacement procedure, and reduction of time required for the procedure are achieved is provided. The printing machine comprises an ink fountain member 2, an ink fountain roller 3, a strip of sheet 39 of which middle part is placed over the ink fountain member 2, a sheet moving device 40, a pair of barrier plates 53 attracted to the ink fountain member 2 under the sheet 39 and attracted to the outer peripheral surface of the ink fountain roller 3 by a permanent magnet, a cleaning tank 56, a cleaning blade 57, a reciprocating device 58, a barrier plate replacing device 85, a plurality of ink containers 65 accommodating different types of ink and being stored in a container storage unit 66, and an ink supply device 86 for holding the desired ink container 65 and supplying the ink therein to the ink fountain 1.

Abstract: Doctor blade assembly for rotogravure printing units, having a support structure for a doctor blade, a holding device of the support structure and a moving device for moving the holding device. The holding device includes a mounting suitable to fix either a chambered doctor blade or a non-chambered doctor blade to the moving device.

Abstract: An improved ink system for a single pan design of a rotogravure printing press includes: the reservoir enclosing a substantial portion of the gravure cylinder; the intake section bottom having a slope at the bottom of the intake section; an intake port through the bottom of the intake section; an outtake port through the bottom of the outtake section; the outtake section bottom having a slope at the bottom of the outtake section sloping toward the outtake port; a dam release lever connected to the gate and extending outside of the reservoir, a plurality of channels through the vortex promoter; a pre-wipe bar located between the doctor blade and the vortex promoter; journal port seals located on each side of the gravure cylinder; and an angled doctor blade holder.

Abstract: A printing machine in which the automation of the replacement of the barrier plate is easily performed, and in which further automation of replacement procedure, simplification of replacement procedure, and reduction of time required for replacement procedure are achieved is provided. The printing machine comprises an ink fountain member 2, an ink fountain roller 3, a pair of barrier plates 53 attracted to the fountain-forming face 37a of the ink fountain member 2 and the outer peripheral surface of the ink fountain roller 3 by a permanent magnet, and a barrier plate replacing device 85.

Abstract: An ink fountain of a printing press includes a component having a bearing face for bearing printing ink and cells made in the bearing face. An ink fountain roll for an ink fountain of a printing press and a printing press having an ink fountain, are also provided.

Abstract: A printing group of a printing press is comprised of a transfer cylinder, a forme cylinder and a first roller of an inking unit. That first inking unit roller cooperates, as an ink application roller, with the forme cylinder. The inking unit is provided with two axially traversing friction cylinders which are serially disposed in the ink path to the forme cylinder. The first inking unit roller has substantially the same diameter as the forme cylinder.

Abstract: An inking unit of a rotary printing press includes a film roller. The film roller has a structured outer surface that has a Shore D hardness ranging between 80 and 90 and a stochastic surface. The stochastic surface is incorporated into the outer surface of the film roller by peening.

Abstract: A fountain solution applicator for a printing press, a printing press having at least one fountain solution applicator and a method for applying an image to a substrate are provided. With the applicator, a variable image can be formed whereby the image can be frequently changed. The number of printings for an image can be varied for each item printed or for any desired number of printing cycles.

Abstract: An inking device of a printing unit includes an ink reservoir, an ink film pick-up roller which has a shaft, and an inking roller having a shaft. A detector detects the distance between the inking roller and the pick-up roller and/or an angular displacement of the two shafts relative to each other and providing an output signal which represents this distance and/or this angular displacement. A controller angularly the second shaft relative to the first shaft, and the controller is capable of reducing the angular displacement and of positioning the pick-up roller in accordance with the output signal.

Abstract: A printing unit of a printing machine is supported by a pair of spaced side frames that are disposed opposite to each other. The printing unit includes at least one printing machine and at least one ink unit. The printing machine is formed by a plurality of printing cylinders. Each of the spaced side frames include a longitudinal crossbar that runs in the direction of transfer of a print substrate traveling through the printing unit. The two longitudinal crossbars form the boundaries of a foot space of the printing unit at two parallel sides. A plurality of pipelines are disposed in the foot space between the two longitudinal crossbars. These pipelines supply flowable media to the printing unit, which flowable media can be either liquid or gaseous. At least one of the pipelines is connected to a user of one of the supplied flowable media in the printing unit or to at least one source of the flowable media. The printing machine can utilize a plurality of printing units.

Abstract: A method for flexographic printing includes applying a control value to an ink pumping and control system responsive to the control value, where the control value sets an operating mode of the ink pumping and control system. Ink is pumped according to the set operating mode through a rotary coupling into a rotating diffusion cylinder, where the diffusion cylinder has an inner channel, an outer surface and a plurality of passages. Ink is first metered through the plurality of passages so as to contact a permeable membrane covering the diffusion cylinder and secondarily metered by passing through the permeable membrane onto a printing plate or printing sleeve which is impressed onto a printing medium to produce a printed output, where the printed output is sensed to provide a modified control value that is then applied to the ink pumping system.

Abstract: A system to remove most or substantially all of the residual ink from an ink chamber prior to post print washing, said ink chamber comprising an ink chamber profile provided with a space for ink, at least one inlet and at least one outlet, and with upper and lower doctor blade members detachably mounted on the ink chamber profile, said blades bounding an opening which, in operation, faces and engages with the outer circumference of an engraved cylinder and which extends over the length of the ink chamber profile, the ink chamber profile being sealed at its extremities by flexible seals, said ink chamber profile, end seals, doctor blades and engraved cylinder demarcating an ink cavity, characterized in that there is further provided a shuttle member within the ink cavity, said shuttle member being movable substantially along the entire length of the ink chamber profile in order to aid purging of residual ink from said ink cavity, said shuttle member further being provided with associated drive means to induce

Abstract: An apparatus and a method for the non-contact, metered application of a liquid, for example a printing ink, to the surface of a cylinder, include an application device which has at least one exit opening for the liquid. An extraction device has at least one entry opening for excess liquid. The excess liquid preferably passes substantially directly from the exit opening to the entry opening. A printing unit and a machine having the apparatus are also provided.

Abstract: A printing press includes an anilox inking unit with an engraved roller and a doctor-type ink fountain. At least one stirring element projects into the doctor-type ink fountain.

Abstract: A fluid delivery device for a printing machine includes a rotating roller having a roller surface with a roller radius of curvature, the roller surface carrying a fluid film, and a metering element having an edge for splitting the fluid film and a first concave surface facing the roller surface. The metering element is movable with respect to the roller surface.

Abstract: The letterpress printing machine includes an impression cylinder (8), at least one inking device (11, 12, 13) with an inking train comprising inking rollers (25, 26, 28) and at least one letterpress forme cylinder (14, 15, 16) inked by said at least one inking device (11, 12, 13). The at least one letterpress forme cylinder (14, 15, 16) is driven by first drive means (30), whereas the at least one inking device (11, 12, 13) is driven by second drive means (31, 32, 33), the second drive means (31, 32, 33) being mechanically independent from the first drive means (30). A control unit is coupled to the second drive means (31, 32, 33) to adjust a circumferential speed of the inking rollers (25, 26, 28) with respect to a circumferential speed of the letterpress forme cylinder (14, 15, 16) so as to adjust deposition of ink by the inking device (11, 12, 13) on the letterpress forme cylinder (14, 15, 16).

Abstract: An inking unit in a printing machine having an ink dispensing system comprising an inking roller and a form cylinder carrying at least one printing form. The inking roller transfers printing ink arriving thereon to at least one printing form positioned on the form cylinder. The printing ink is transferable from a respective printing form to print sheets moved between the form cylinder and an impression cylinder. The inking roller is also adjustable relative to the form cylinder. An engagement and/or disengagement of the inking roller relative to the form cylinder and/or an engagement and/or disengagement of a print blanket cylinder or form cylinder relative to the impression cylinder is performable such that print sheets become can be imprinted with a residual ink image by residual ink remaining on the plate cylinder or print blanket cylinder in a printing ON setting with the ink supply disengaged.

Abstract: A liquid transfer arrangement for applying a printing liquid to a printing surface, for example, in a printing apparatus comprising a liquid transfer roller, a printing cylinder with a peripheral printing plate in surface contact with the transfer roller, and an impression cylinder in peripheral surface contact with the printing cylinder for conveying a printable substrate therebetween. The liquid transfer arrangement comprises an encasement arcuately surrounding a substantial circumferential portion of the transfer roller surface to define a substantially uniform constricted radial spacing therebetween for containing a limited quantity of the printing liquid to be carried by the transfer roller to the printing cylinder. A device associated with the encasement feeds a printing liquid supply into the radial spacing for take up by the transfer roller surface.

Abstract: An ink supplying unit supplies a water-based ink having a predetermined water content set in advance. An ink form roller receives the water-based ink from the ink supplying unit. A plate cylinder is in contact with the ink form roller, and receives the water-based ink from the ink form roller. A water-content decreasing unit decreases the water content of the water-based ink on the ink form roller.

Abstract: An ink fountain device includes a fountain roller, a blade, a pair of ink dams, a compression coil spring, and a fountain roller moving device. The fountain roller is rotatably supported by an eccentric bearing. The blade is arranged close to the fountain roller. The distal end of the blade forms a clearance, with respect to an outer surface of the fountain roller, where ink is to be supplied. The pair of ink dams are arranged to be substantially perpendicular to the blade and oppose each other in an axial direction of the fountain roller, and are supported to be movable toward and away from the outer surface of the fountain roller. The compression coil spring biases the ink dams to move toward the outer surface of the fountain roller. The fountain roller moving device pivots the eccentric bearing so as to move the fountain roller.

Abstract: A decorator temperature control system includes a recirculation loop configured to recirculate a solution and a feeder line configured to receive the solution from the recirculation loop and deliver the solution to at least one ink roller on a decorator. A feed valve is located between the recirculation loop and the feeder line and proximate the decorator and is configured to control the flow of the solution from the recirculation loop to the feeder line. The valve is controlled from a location remote from the decorator.

Abstract: A rotary printing press has at least one printing group with at least one waterless planographic printing forme. An inking unit is assigned to the printing group as is provided with a screen roller for use in conveying printing ink to the printing group. The screen roller has line engraving or cross-hatchings, with an angle of inclination or an angle of rise of between 50° and 80° and preferably also has a raster frequency of less than 80 lines or cross hatchings per centimeter on its surface area.

Abstract: The inking system of an offset lithography press incorporates certain rollers running at different speeds. The hard rollers do not oscillate and the form rollers and the soft transfer rollers of the inking system oscillate endways.

Abstract: An inking unit for printing units of rotary presses is independent of the printing unit and is configured as a self-contained unit. The linking unit can be removed from the printing unit and has a dedicated drive for a plurality of rolls, the drive being arranged on side walls which are assigned to the inking unit.

Abstract: A printing press includes an anilox inking unit with an engraved roller and a doctor-type ink fountain. At least one stirring element projects into the doctor-type ink fountain.

Abstract: A sheet-fed printing machine includes an anilox inking unit having a screen roller and an ink applicator roller, as well as a dampening unit having a dampener applicator roller. The ink applicator roller has an outside diameter which is more than twice as large as the outside diameter of the dampener applicator roller.

Abstract: An inking device of a printing unit includes an ink reservoir, an ink film pick-up roller which has a shaft, and an inking roller having a shaft. A detector detects the distance between the inking roller and the pick-up roller and/or an angular displacement of the two shafts relative to each other and providing an output signal which represents this distance and/or this angular displacement. A controller angularly the second shaft relative to the first shaft, and the controller is capable of reducing the angular displacement and of positioning the pick-up roller in accordance with the output signal.

Abstract: An ink applicator has at least one generally stationary mounting part, a fixed elongated bar fixedly mounted on the mounting part and carrying an elongated applicator blade, and a movable elongated bar mounted on the mounting part, extending parallel to the fixed bar, carrying an elongated applicator blade parallel to the fixed-bar blade, and defining an elongated ink-holding compartment with the fixed bar. The movable bar is supported on the mounting part for movement between an outer position with the movable-bar blade spaced transversely from the fixed-bar blade and defining a gap through which ink can flow out of the compartment and an inner position with the blades engaging one another and closing the gap so that no ink can flow out of the compartment.

Abstract: Methods for performing a roller adjustment in a printing press include an axial spacing adjustment and an oblique position adjustment. The oblique position adjustment is carried out along a straight line of movement which extends perpendicularly relative either to another straight line of movement of the axial spacing adjustment or to a tangential line of a pivoting circular arc of the axial spacing adjustment.

Abstract: An integrated ink rail assembly includes at least one page pack mounted directly to a manifold, an ink rail mounted to the manifold, and an orifice rail mounted to the ink rail. An ink source is connected to the page pack. The page pack, manifold, ink rail, and orifice rail define a plurality of ink passages to deliver ink from the ink source to a drum. The ink passage may be directed towards the middle of the assembly such that a web smaller than the page pack can be printed.

Abstract: An ink feeding method includes a density reading step for reading density data obtained by measuring densities of detecting patches on a first image, before an end of a printing operation, a first computing step for computing, from the density data, an ink feed film thickness remaining after prints having the first image are made, a second computing step for computing an ink feed film thickness required for making prints having a second image, from a target density for the prints having the second image, a third computing step for computing a preset ink feeding rate from the ink feed film thickness remaining after the prints having the first image are made, computed in the first computing step, and the ink feed film thickness required for making the prints having the second image, computed in the second computing step, and an ink feeding step for feeding the preset ink based on the preset ink feeding rate computed in the third computing step.

Abstract: An ink fountain apparatus for a printing press includes an ink fountain roller, bottom plate, ink fountain, and scraping member. The ink fountain roller is supported rotatably. The bottom plate is arranged at such a position that its distal end portion is close to the ink fountain roller. The ink fountain has a pair of ink dams. The ink dams are arranged in a direction substantially perpendicular to the bottom plate, and oppose each other in an axial direction of the ink fountain roller. Each of the ink dams includes an elastic member and first and second urging members. The elastic member abuts against an outer surface of the ink fountain roller and the bottom plate. The first and second urging members urge the elastic member toward the outer surface of the ink fountain roller and the bottom plate.

Abstract: In a printing press, ink fountain keys are disposed to be movable toward and away from an ink fountain roller of an ink fountain to allow them to have a predetermined gap therebetween and hence the amount of ink to be fed to a downstream roller to be determined. The ink fountain roller is rotated while ink is prevented from being fed to the downstream roller. At least one of the ink fountain keys is moved so as to allow the at least one of the fountain keys to change a position thereof relative to the ink fountain roller of the ink fountain with time. With this arrangement, it is possible to improve an ink kneading effect produced by the rotation of the ink fountain roller without the necessity to manually knead ink in the ink fountain by the operator and the necessity to provide any ink kneading device or unit independently of the printing press.

Abstract: An ink fountain apparatus for a rotary printing press includes an ink fountain, an intermediate ink dam, and press unit for simultaneously pressing the intermediate ink dam toward the outer surface of the fountain roller and toward the upper surface of the bottom plate. A width of the first surface close to the boundary portion in the axial direction of the fountain roller is set to be smaller than a width of the first surface arranged upstream of the fountain roller in a rotational direction from the boundary portion in the axial direction of the fountain roller.

Abstract: A short inking unit for a planographic printing unit that has a compact design and is operable for transferring an ink film to a form cylinder with high uniformity and stability. This short inking unit includes an applicator roll arrangement having a plurality of applicator rolls (5, 6; 5, 6, 15) which each interact with the form cylinder (1) and are offset with respect to one another in the direction of rotation of said form cylinder (1), and a plurality of engraved rolls (7, 8; 7, 8, 13; 17, 7, 8; 17, 7) which are offset with respect to one another in the direction of rotation of the form cylinder (1) and which each have a respective ink supply for applying ink to the engraved roll. The applicator rolls and engraved rolls form a roll train having rolls which roll on one another in pairs with each pair of rolls including one applicator roll (5, 6, 15) and one engraved roll (7, 8, 13, 17) interacting at a roll nip of the roll train.