Abstract: An improved method and system for cleaning a cylinder of a printing press. One method involves soaking a strip of cleaning fabric on a press with a low volatility organic compound solvent. Excess solvent, if any, is removed to place the strip of cleaning fabric in functional equilibrium with the solvent. The cleaning fabric is then used to clean a cylinder. Alternatively, the strip of cleaning fabric is soaked on site by contacting the strip of cleaning fabric with the solvent and wrapping the strip of cleaning fabric into a cleaning fabric supply roll. The cleaning fabric is then brought in engagement with a printing press having a cylinder to be cleaned without disposing a sleeve around the fabric roll and without substantially disturbing the distribution of the solvent in the fabric roll and detrimentally affecting the cleaning ability of the fabric.

Abstract: A flexographic printing plate cleaner comprises a linear actuator operably mounted relative to a plate cylinder carrying a flexographic printing plate; a frame carried by the linear actuator for movement along a path parallel to an axis of rotation of the plate cylinder; and a double-acting three-position cylinder carried by the frame. The cylinder includes a first piston rod a retracted position, a first extended position and a second extended position. A backing plate secured to an exterior end of the first piston rod and movable therewith. A cleaning pad is disposed in front of the backing plate and adjacent the flexographic printing plate such that the cleaning pad engages the printing plate at a first pressure when the first piston rod is at the first position, and at a second higher pressure when the first piston rod is at the second position.

Abstract: A magnetic transfer method which superposes on a magnetic disk surface a magnetic transfer master disk (2) on which a magnetic film is formed so as to have an array pattern shape corresponding to a preset information signal, and magnetizes the magnetic film on the master disk (2) to thereby magnetic-transfer-record the array pattern of the information signal on the master disk (2) onto the magnetic disk as the magnetized pattern of the information signal, the method characterized by comprising a step of contacting/separating to/from a dummy disk (1) the magnetic film-formed surface of the master disk (2) to thereby clean the master disk (2), and a step of superposing, after the cleaning, the master disk (2) on the magnetic disk for magnetic transfer recording; and a magnetic transfer device for the method.

Abstract: The device comprises a suction chamber (41) having a mouth facing toward the cylinder and a nozzle (44) which is associated with the suction chamber and by which a jet of a cleaning liquid is generated. At least a first drying chamber (45, 47) is also provided, associated with said suction chamber (41) and connected to a suction pipe (43).

Abstract: A stencil wiper apparatus for wiping a stencil of a stencil printer includes a material supply assembly having a supply roller to deliver a roll of material, a take-up roller to receive the material, and a drive to move the material across the stencil between the supply roller and the take-up roller. The apparatus further includes a fluid delivery assembly to wet the material. The fluid delivery assembly includes an outer tube, an inner tube and a fluid delivery source. The outer tube is designed to engage the material and to deliver fluid to the material. The inner tube is positioned within the outer tube, and designed to deliver fluid to the outer tube. The fluid delivery source delivers fluid to the inner tube. A method for wiping a stencil of a printing machine is further disclosed.

Abstract: A paper cleaning apparatus employs a paper buffing roll which has a lightweight hollow cylindrical core mounted between stub shafts. The stub shafts are mounted to bearings and the hollow core is arranged to be driven at approximately 3,450 to approximately 4,450 RPM. The surface of the cylindrical core is given a rough surface over which a wool cloth jacket is placed. The cloth sleeve is clamped in place by retaining end caps which fit over the stub shafts and clamp the sleeve against the ends of the hollow cylindrical core. The cloth sleeve is shrunk onto the surface of the cylindrical core with hot water or steam. The cloth sleeve is frayed to form a soft outer surface, with radially extending fibers.

Abstract: During a washing cycle of a rubber blanket on a blanket cylinder some revolutions of the blanket cylinder are initially performed during which the cleaning element is lifted off the blanket cylinder temporarily when the clamping channel passes under the cleaning element.

Abstract: A complete cleaning system for printing cylinders within a rotary printing press, by which a reactive erasing of ink-bearing layers, including the removal of filling materials from a gravure printing form, and a cleaning of ink from all form and transfer cylinders are possible during the printing process or during printing pauses. At least one erasing device is provided which emits a jet of water under pressure that can be directed against the corresponding outer surface of each desired cylinder so that, on the one hand, all traces of ink can be removed and, on the other hand, a reactive erasing of ink-conducting layers including filling materials from a gravure printing-form cylinder is possible.

Abstract: An image recording equipment is provided with an adhesive roller that is brought into contact with a surface of an image recording sheet wound around a rotary drum and keeps in contact with the image recording sheet with contact pressure axially distributed in a range from approximately 0.01 Mpa to approximately 0.2 Mpa desirably in a concave distribution pattern.

Abstract: A printer has a printing drum with recesses on the surface thereof into which ink is provided for printing. After printing, any remaining ink is removed at a cleaning station including immersion in a fluid, air jets, or an air suction. The cleaning station and the inking station operate simultaneously.

Abstract: A method of and apparatus for extending the life of fountain solutions used in commercial printing presses comprises withdrawing fountain solution from the dampener recirculation system of a printing press and directing the withdrawn fountain solution through a sediment prefilter, a separation filter, and a posttreatment filter. The sediment prefilter preferably comprises a melt blown polypropylene filter; the separation filter preferably comprises a diatomaceous earth filter; and the post-treatment filter preferably comprises a zeolite filter.

Abstract: A washing device for an impression cylinder jacket in a sheet-fed offset two-sided printing press equipped with an impression cylinder installed with a jacket having a metal plate, a base layer formed to have concave-convex profile on the surface of the metal plate and a low surface energy resin layer formed on the base layer, includes a controller that executes a first control of causing a plate cylinder to contact with a blanket cylinder as well as the blanket cylinder to contact with the impression cylinder, and causes each cylinder to rotate under those contacts for a specified period of time while a cleaning unit is in contact with the blanket cylinder; and a second control of separating the plate cylinder from the blanket cylinder, and causing a water form roller and an ink form roller with the plate cylinder.

Abstract: Keyless inking systems and methods are disclosed which employs a main form roller and a smaller clean-up roller, both in contact with a rotating printing plate. Separate application and subtractive roller systems control the ink film on the form roller. The clean-up roller removes residual ink from non-image areas on the printing plate. The clean-up roller is in ink communication with the main form roller through a vibrating roller. Mechanisms are provided to selectively engage and disengage the various rollers.

Abstract: A positioning device for functional devices of printing presses, having at least one guide unit and one drive for moving and positioning the functional device for throwing-on/throwing-off movements with regard to impression cylinders. Weight compensation means are provided for the vertical displacement, so that the drive can be at least partially relieved of the weight of the functional device.

Abstract: In a printing system where ink from an applicator roller is applied to a form roller in rotational contact with a plate cylinder, methods of washing up after printing in which methods the form roller is disengaged from the plate cylinder and a subtractive roller system removes a mixture of residual ink and ink solvent from the form roller and applicator roller. In preferred embodiments, the press drive is stopped during wash-up and the form roller is independently driven.

Abstract: A de-duster for a moving printing material web includes at least one blower nozzle assigned to a first side of the printing material web, and at least one blower nozzle assigned to a second side of the printing material web. The blower nozzles are set counter to web travel direction at an angle ?. The de-duster further includes at least one extraction nozzle assigned to the first side of the printing material web, and at least one extraction nozzle assigned to the second side of the printing material web. The extraction nozzles are set counter to the web travel direction at an acute angle ?. Each of the at least one blower nozzle is disposed between the at least one extraction nozzle at a respective side of the printing material web and the respective side of the printing material web. A combination of the de-duster and a cutting device, a folder with the combination, and a web-processing printing press in combination with the folder, are also provided.

Abstract: For cleaning a printing medium, the printing medium for each print cycle is structured on its surface such that it carries new image information that is inked with ink material. Inked material is transfer printed on a medium. The surface of the printing medium is cleaned before application of a new image information by charging with a cleaning fluid.

Abstract: A device for coating an element is described. The device is capable of bearing and using a swab impregnated with a coating composition and includes a mobile carriage for bearing the swab. The carriage is movable along a guiding path. The device further includes an element for pushing the swab towards the element to be coated so that a quantity of the composition released from the swab coats an element. The device also includes an element for distributing the composition, so that the coating is substantially uniform.

Abstract: A debris screen for a printing press having an ink roller train and a paper pathway includes a source reel, a collecting reel, and at least one transfer roller mounted to a supporting frame, a sheet of flexible material extending along a sheet path from the source reel, over the transfer roller, and to the collecting reel, the transfer roller positioned on the frame such that the sheet path extends between a portion of the ink roller train and the pathway for the paper web.

Abstract: An ink removal method for a printing press includes an ink removal step of bringing ink form rollers and a dampening form roller into a throw-on state relative to a plate cylinder, and bringing the dampening form roller into a throw-off state relative to a ductor roller of a dampening unit. The ink removal method has high general purpose properties, and can remove ink from the dampening form roller with high accuracy by simple means, i.e., changing throw-on and throw-off timings for existing rollers without using a rider roller or the like.

Abstract: A direct-to-press imaging method comprises: (a) applying an imageable coating to a printing cylinder, wherein the imageable coating comprises a composition such as a thermally switchable polymer which changes affinity for a printing fluid upon exposure to imaging radiation such as infrared radiation delivered imagewise via a laser, and the imageable coating is substantially insoluble in the printing fluid; (b) imagewise exposing the imageable coating to actinic radiation to obtain an imaged coating; (c) printing a plurality of copies of an image from the imaged coating; and (d) reapplying the imageable coating as desired by repeating steps (a) through (c) at least once without substantially removing the prior imaged coating before reapplying the imageable coating.

Abstract: An apparatus is arranged to clean a cylinder with cleaning liquid being supplied. The cylinder includes an outer surface to which impurities are adhered. The impurities are removed from the outer surface when cleaning. The apparatus includes a spray bar into which the cleaning liquid is directed with pressure. The spray bar comprises tube means which includes nozzle holes formed therein for spouting the cleaning liquid. The tube means is formed of elastic material and elastically deformed by the pressure of cleaning liquid to open the nozzle holes and spout the cleaning liquid. The tube means is elastically restored, when the cleaning liquid is not directed with pressure into the spray bar, to close the nozzle holes.

Abstract: The present invention relates to a device for adjusting the width of a paper web at a rotary lithographic press and the object of the present invention is to prevent ink or specks of paper from becoming attached to contact parts of a pressing member so as to contaminate the surface of the paper web, and to enable straightforward fitting and removing of a rotatable pressing member. This configuration is therefore provided with one or more pressing members 1 with a plurality of contact members 11 provided integrally in a rotating manner so as to be capable of being mutually separated along the widthwise direction of a paper web W, a support shaft 20 supporting the pressing member(s) 1 in a rotatable manner, wavy surface adjustment means 2 capable of moving the support shaft 20 towards and away from the surface of the paper web W, and pressing member rotation drive means 4 for simultaneously rotating and driving the pressing member 1.

Abstract: A flexographic printing plate cleaner comprises a linear actuator operably mounted relative to a plate cylinder carrying a flexographic printing plate; a frame carried by the linear actuator for movement along a path parallel to an axis of rotation of the plate cylinder; and a double-acting three-position cylinder carried by the frame. The cylinder includes a first piston rod a retracted position, a first extended position and a second extended position. A backing plate secured to an exterior end of the first piston rod and movable therewith. A cleaning pad is disposed in front of the backing plate and adjacent the flexographic printing plate such that the cleaning pad engages the printing plate at a first pressure when the first piston rod is at the first position, and at a second higher pressure when the first piston rod is at the second position.

Abstract: Upon replenishing cleaning members 10 of a plurality of sets of cleaning means 1 of a cleaning apparatus with a cleaning solution, those sets of cleaning means 1 having the cleaning members 10 to be replenished, respectively, are fed with the cleaning solution from a cleaning solution supply source part 21 communicated with the plurality of sets of cleaning means 1 through supplying conduits 23 via supply branching part 22. The cleaning solution as fed out reaches the supply branching part through the supply pipe, and fed out from the supply branching part in a manner branched into the supplying conduits branched to feeding destinations, respectively, to thereby reach the plurality of cleaning members to be replenished. In this way, upon replenishing a plurality of cleaning members of a bearer cleaning apparatus with a cleaning solution, it becomes possible to replenish the plurality of cleaning members with the cleaning solution from a single location in an extremely simple manner.

Abstract: Divided shaft members constitute a cleaning fabric take-up shaft, and are secured at both ends by shaft member fixing means that is attached to a side plate. Shaft member fixing portions include a shaft end supporter, for supporting the end of the shaft member, and a plug that is fitted to a shaft receiving section. A wedge portion is provided, which runs across the center of the shaft end supporter and is projected linearly. When this wedge portion is inserted between the shaft members, the diameter of the shaft is increased. At this time, the winding of the cleansing fabric is performed. To dispose of the wound cleaning fabric, the shaft members are detached from the shaft member fixing portions and the wedge is extracted from the shaft members, so that the diameter is reduced, and the cleaning fabric is disengaged from the shaft members. As a result, the cleaning fabric take-up shaft can be removed from the cleaning fabric roll.

Abstract: The present invention provides a method and apparatus for cleaning a coating material from a surface of a print substrate mounted on the plate cylinder of a printing press using an ultrasonic acoustic cleaning apparatus. The method comprises: applying a cleaning solution onto a surface of the print substrate, rotating the plate cylinder to displace the print substrate under an ultrasonic acoustic cleaning apparatus to dislodge a coating material from the surface of the print substrate, and removing the dislodged coating material and the cleaning solution from the print substrate using a vacuum system.

Abstract: A cleaning apparatus includes a pressure pad for a cleaning fabric. The pressure pad comprises a particular portion formed on a base portion. The base portion has a predetermined hardness. The particular portion has a predetermined hardness which is lower than the hardness of the base portion. The cleaning fabric is nipped between the particular portion and a subject to clean the subject with the cleaning fabric.

Abstract: A printing unit for a machine for processing flat printing materials includes a feeding cylinder for loading the printing unit with the printing materials in a processing direction, and a device for removing particles adhering to the surface of the printing materials, the particle-removing device further including a blowing device for separating the particles from the printing materials without contact, and a suction device for discharging the separated particles, both the blowing device and the suction device being formed by blowing and suction chambers arranged within the feeding cylinder and having a fluidic connection to surroundings of a jacket surface of the feeding cylinder; a machine including the printing unit; and a feeding drum or cylinder of the printing unit.

Abstract: A cleaning apparatus for a printing press. The cleaning apparatus of the present invention allows for effective removal of contaminants from printing press print plates while the printing press is running. Furthermore, the cleaning apparatus of the present invention effectively applies and removes cleaning fluids such as water from the printing plate without resulting in the formation of water drops and streaks on the printed substrate.

Abstract: A washing device for an impression cylinder jacket in a sheet-fed offset two-sided printing press equipped with an impression cylinder installed with a jacket having a metal plate, a base layer formed to have concave-convex profile on the surface of the metal plate and a low surface energy resin layer formed on the base layer, includes a controller that executes a first control of causing a plate cylinder to contact with a blanket cylinder as well as the blanket cylinder to contact with the impression cylinder, and causes each cylinder to rotate under those contacts for a specified period of time while a cleaning unit is in contact with the blanket cylinder; and a second control of separating the plate cylinder from the blanket cylinder, and causing a water form roller and an ink form roller with the plate cylinder.

Abstract: A circuit board with high quality is provided by preventing the falling of paste which comes around to the squeegee complementary angle side during the pattern printing or paste filling by the squeegeeing method. While lowering, the squeegee is passed through the inclined portion of a paste removing section (3) provided on a mask (2) before pattern printing or paste filling, whereby the paste on the non-printing side (complementary angle) of the squeegee can be removed; thus, a circuit board superior in quality is obtained.

Abstract: A debris screen for a printing press having an ink roller train and a paper pathway includes a source reel, a collecting reel, and at least one transfer roller mounted to a supporting frame, a sheet of flexible material extending along a sheet path from the source reel, over the transfer roller, and to the collecting reel, the transfer roller positioned on the frame such that the sheet path extends between a portion of the ink roller train and the pathway for the paper web.

Abstract: A printing system has an imaging subsystem, an application subsystem, and a decoupler separating the imaging subsystem from the application subsystem. A method of imaging is also provided. In a placing action, an image is placed on a transfer roll in a first environment. In a moving action, the transfer roll is moved to a second environment. In a transferring action, the image is transferred to a media.

Abstract: A printing system is disclosed including an inking system with a single form roller for applying ink to a printing cylinder. Ink is applied to the form roller by an applicator roller having a surface with an array of interconnected wells and a variable speed drive. The form roller and plate cylinder are rotated at the same rpm while the speed of the applicator roller is varied to vary the amount of ink applied to the plate. A variable speed subtractive roller system removes excess ink from the form roller and returns the ink to a common reservoir. For wash-up, the press drive and form roller are disengaged and the inking system is rotated by an inker roller drive while wash-up fluid is applied to the inking system.

Abstract: A method of preventing an ink from increasing in viscosity is praticed by repeatedly performing the steps of supplying provided from an ink supply-aspiration nozzle to an ink reservoir provided between an inking roll and a squeeze roll pressed into contact with the inking roll, moving the nozzle toward one end of the reservoir and causing the nozzle to aspirate a predetermined amount of ink to produce a flow of ink in the reservoir toward the end thereof, and moving the nozzle toward the other end of the reservoir and similarly causing the nozzle to aspirate a predetermined amount of ink to thereby produce a flow of ink toward the other end. A diluting liquid is supplied to the reservoir while performing these steps.

Abstract: A printing machine provided with a rectilinear guide and a cleaning device having a handle for moving the cleaning device along the rectilinear guide includes at least one joint by which the handle is attached to the cleaning device in a manner that the handle is movable relative to the cleaning device.

Abstract: In an exposure device for exposing thermal printing plates having a plate drum holding the printing plates and a pressure roller pressing the pressure plates onto the plate drum during the clamping and unclamping of the printing plates, a device for eliminating combustion residues in an exposer for printing plates includes a pick-up roller in contact with the pressure roller and picking up the combustion residues adhering to the pressure roller. The pick-up roller preferably has an adhesive surface and the pressure roller has a non-adhesive surface.

Abstract: In a first printing process in Steps S1 through S6, ink supply is controlled so that a measured printed density (Vn) is approximately equal to a first target density (V1). This provides a uniform amount of ink remaining on ink rollers after the first printing process. Thereafter, in a second printing process in Steps S7 through S11, printing is performed using a second target density (V2) lower than the first target density (V1). This provides a slightly reduced, uniform amount of ink remaining on the ink rollers. Thus, a novel method of presetting ink is provided which facilitates the formation of a distribution of the new amount of ink at the beginning of the next printing operation and which stabilizes the early start of printing.

Abstract: A device for cleaning a cylinder of a machine for processing printing material includes a cleaning cloth pressable onto the cylinder for forming a contact zone. A first monitoring zone is monitorable with regard to a faulty position of the cleaning cloth, and is disposed downstream of the contact zone in a travel direction of the printing material. A second monitoring zone disposed upstream of the contact zone in the travel direction of the printing material is monitorable with regard to another faulty position of the cleaning cloth.

Abstract: A cleaning device in a printing machine includes a cleaning tool and a tilting clamp mechanism for holding the cleaning tool in different positions. The cleaning tool and the tilting clamp mechanism are coupled to, and can be decoupled from, each other by a coupling device. A printing machine having a cleaning device is also provided.

Abstract: The present invention relates to a calender roll cleaning apparatus for smoothing a surface of a magnetic layer of a magnetic recording medium passed through a plurality of calender rolls. The cleaning apparatus comprises a wiping cloth feeding apparatus that feeds a calender roll surface wiping cloth at a definite rate and tension. A cleaning liquid supplying apparatus supplies a controlled amount of cleaning liquid such that the cleaning liquid permeates into the wiping cloth fed from the wiping cloth feeding apparatus. A wiping cloth pressing apparatus presses the permeated wiping cloth at a controlled pressing load.

Abstract: In a rotary screen printing apparatus, a method and apparatus are disclosed for converting a printing station into a cleaning station. A cleaning attachment replaces either the squeegee or the flood bar, or both, in a conventional print station.

Abstract: Information carried on a stimulable phosphor sheet can accurately be read therefrom without dust particles being present on the surfaces of the stimulable phosphor sheet. A dust of a first cleaning unit has a first opening for introducing the stimulable phosphor sheet into the duct and a second opening for discharging the stimulable phosphor sheet out of the duct. The duct has an upper housing member which accommodates therein a first brush roller and a third brush roller that extend parallel to each other and a lower housing member which accommodates therein a second brush roller and a fourth brush roller that extend parallel to each other. The upper housing member also houses therein a first dust removing plate having tip ends held against bristles of the first brush roller and the third brush roller, and the lower housing member also houses therein a second dust removing plate having tip ends held against bristles of the second brush roller and the fourth brush roller.

Abstract: A printer with a duplex printing capability of the present invention includes a printing section. In a duplex print mode, the printing section prints either one of a first and a second image formed in a master side by side on the front side of a first sheet. A path selector steers the first sheet coming out of the printing section toward an auxiliary tray. The printing section prints either one of the first and second images on the front side of a second sheet while refeeding means again feeds the first sheet to the printing section to thereby form either one of the first and second images on the reverse side of the first sheet. The path selector steers the first and second sheets toward a sheet discharging section and the auxiliary tray, respectively.

Abstract: A system for cleaning a moving substrate includes a rail mounted adjacent to the substrate surface and substantially transverse to the direction of movement thereof. A carriage for supporting a contact cleaning roller (CCR) is deployed on the rail for allowing axial translation of the CCR transversely of the substrate while in rolling contact therewith. Two renewal stations for cleaning the CCR are mounted adjacent the rail, one outboard of each substrate edge. The CCR is at least twice as long as the width of the substrate and is axially oscillable for a distance sufficient that all portions of the CCR surface may be cleaned by the renewal stations during one oscillation cycle of the CCR while the CCR maintains continuous contact with the substrate across the full width thereof. The CCR mounted on the carriage may be a primary CCR and the substrate may be a continuous web or sheet, or the CCR mounted on the carriage may be a secondary CCR and the substrate may be a primary CCR or other process roller.

Abstract: Printing-press roll cleaning method and apparatus. Washing liquid is applied only to discrete longitudinal wetting zones (52) on a roll to be cleaned, leaving longitudinal non-wetting zones (54) between them. During the rotation of the rolls, the washing liquid flows away to the longitudinal non-wetting zones (54).

Abstract: The invention relates to a method and apparatus for washing a roll particularly in a paper-coating station, in which the roll (11) is washed with a wash sponge (12) by moving it transversely across the roll (11) as the roll (11) rotates. The movement of the wash sponge (12) takes place mechanically. The washing apparatus includes a carrier beam (15) the width of and fitted close to the roll (11) being washed, a moving cradle (21) set on this to carry the washing device (16) and to transport it once or several times from one end of the roll (11) to the other.

Abstract: A magnetic transfer method which superposes on a magnetic disk surface a magnetic transfer master disk (2) on which a magnetic film is formed so as to have an array pattern shape corresponding to a preset information signal, and magnetizes the magnetic film on the master disk (2) to thereby magnetic-transfer-record the array pattern of the information signal on the master disk (2) onto the magnetic disk as the magnetized pattern of the information signal, the method characterized by comprising a step of contacting/separating to/from a dummy disk (1) the magnetic film-formed surface of the master disk (2) to thereby clean the master disk (2), and a step of superposing, after the cleaning, the master disk (2) on the magnetic disk for magnetic transfer recording; and a magnetic transfer device for the method.

Abstract: A direct-to-plate method of lithographic printing is disclosed wherein a printing press is used that is coupled to a coating apparatus and to a cleaning apparatus; wherein the coating apparatus applies an image-recording layer on a substrate so as to obtain a printing plate, which is mechanically transferred to the printing press; and wherein, after the print job, the printing plate is mechanically transferred to the cleaning apparatus wherein the substrate is recycled, so that the recycled substrated can be reused in a next cycle of coating, printing and cleaning. The off-press coating and the off-press cleaning step provide a fully automated printing method wherein the press down-time is minimized. The method comprises also an off-press or an on-press exposure step.