Abstract: A device for cleaning silicone particles and other residues from directly imaged printing forms of a printing form cylinder in a printing press includes a cleaning element extending parallel to the axis of the printing form cylinder and movable substantially radially against the printing form cylinder, the cleaning element having a cleaning surface with which it is engageable with the printing form, the cleaning surface being formed with a fleece of fine microfibers of plastic material.

Abstract: The instant invention provides a process and a product made by the process. The first step of the process includes: providing a press having at least one die which forms the negative image of one face of a license plate of sufficiently small size to be used as an element of jewelry. The second step of the process includes: providing a generally planar blank having an upper and a lower surface, and is comprised of a precious metal such as: gold, silver, platinum, palladium, vanadium or combinations of these metals. The third step of the process includes: impressing the at least one die on the blank with the press sufficient to emboss a positive image of the license plate on at least one surface.

Abstract: An improved apparatus and method for cleaning one or more of the rollers used in printing presses. Typically, the printing press features manual or automated devices for supplying cleaning solvent to the press during a washing operation. A blade assembly is pivotally disposed for engagement with the press roller. The blade assembly features a blade unit for scraping solid and liquid debris from the roller, and a receptacle trough for collecting used solvent as well as solid and liquid debris. In the improvement, a sheathing system is provided to supply protective sheath material to cover the blade assembly to keep the blade assembly clean during the washing operation. The sheath material preferably has a low coefficient of friction to prevent wearing of the components and is relatively thin to maintain the blade geometry for effective cleaning of the roller.

Abstract: A print image treatment device is formed of a contact member which is coated on the peripheral surface with an excessive ink removing liquid incompatible with printing ink for forming a print image and having a lower surface tension than the printing ink, and is rotated in a specific direction, a facing member which serves to bring the printed side of a printed paper into contact with the excessive ink removing liquid by feeding the printed paper nipped between the contact member and the facing member, a supply means for supplying the excessive ink removing liquid to the peripheral surface of the contact member, and a cleaning means which contacts the peripheral surface of the contact member. The angle of the cleaning means from the tangent line of the peripheral surface is within a range of 5 to 60 degrees.

Abstract: The invention relates to a device and method for removal of impurities from, and recirculation of, cleaning agent in a printing machine. Contaminated cleaning agent is purified by passing it through a series of sedimentation devices. In these sedimentation devices, gravity is used to separate the cleaning agent into its constituent parts. Once the impurities have been removed from the cleaning agent, the constituent parts that can be reused are recirculated to the washing devices of the printing machine while the impurities are disposed appropriately.

Abstract: A cylinder cleaning apparatus for a printing press includes a cleaning unit, an actuator, another actuator, and a control unit. The cleaning unit is supported by a printing press frame to be movable between a cleaning position where a cleaning web is in contact with a circumferential surface of a cylinder and a retreat position where the cleaning web is separate from the circumferential surface of the cylinder. The cleaning unit has a cleaning cloth supply roll for supplying the cleaning web to the circumferential surface of the cylinder and a cleaning cloth take-up roll for taking up the cleaning web supplied from the cleaning cloth supply roll. The actuator is fixed to the printing press frame to pivot the take-up roll for a predetermined amount, thereby taking up the cleaning web. Another actuator moves the cleaning unit to one of the cleaning position and the retreat position in accordance with whether the cylinder is in a first or second cleaning mode.

Abstract: A device for cleaning the outer cylindrical surfaces of cylinders in a rotary printing machine includes a cleaning cloth extending over the length of a respective cylinder and cooperating with a pressing-on element. The cleaning cloth is pressable against a respective outer cylindrical surface by the pressing-on element. The pressing-on element includes an elastically deformable body having an internal cavity. As internal pressure is applied to the hollow body, the hollow body expands to apply the cleaning cloth to the outer cylindrical surface of the cylinder. Suction is applied to the hollow body to return the cleaning cloth to a disengaged position a substantial distance from the outer cylindrical surface of the cylinder.

Abstract: A cylinder cleaning apparatus for a printing press includes a cleaning web take-up roll, a constant amount feed mechanism, a unit throw-on/throw-off actuator and an actuator, and a plate and bolts. The cleaning web take-up roll takes up a cleaning web supplied from a cleaning web supply roll to clean a circumferential surface of a cylinder. The constant amount feed mechanism takes up a constant amount of the cleaning web on the take-up roll regardless of an amount of the cleaning web taken up by the take-up roll. The unit throw-on/throw-off actuator and the actuator drive to rotate the take-up roll in taking up the cleaning web. The plate and bolts adjust a pivot amount of the take-up roll on which the constant amount of the cleaning web is taken up by the constant amount feed mechanism.

Abstract: A method and an apparatus for cleaning a rotating cylinder of a rotary printing machine. The apparatus having a washing device, including a washing brush, roller, or cloth, which can be engaged and disengaged from the rotating cylinder to be cleaned. The washing brush roller or cloth can be sprayed with a cleaning fluid (detergent, water) as well as both water. The method and apparatus ensure a controlled guiding of the detergent onto the outer surface of the rotating cylinder, which guarantees an effective cleaning and, at the end of the washing operation, leaves a relatively dry outer surface of the rotating cylinder. The cleaning method is intended to be suitable, in particular, for detergents having a biological base, for example, esters of vegetable oil.

Abstract: A cylinder cleaning apparatus expected to clean an external surface of cylinder by using a cleaning cloth which is fed from a cloth feed roll and expanded between the cloth feed roll and a corresponding cloth wind shaft. The apparatus is characterized to have a first axis driving the cloth feed roll to supply the cleaning cloth, a second axis driving the cloth wind shaft to wind the supplied cleaning cloth, and a power generation means for generating a rotation power for rewinding the first axis and winding the second axis in conformity with a displacement degree of a cloth feed arm swung by an actuator; and a shift means for selectively transmit the rotation power by the power generation means to the first axis or second axis.

Abstract: Printing press cylinders are washed with a washcloth which is selectively wound forward and backward between a rotatable supply drum and a rotatable takeup drum. The washcloth is thereby cyclically pressed against a surface of a respective cylinder of the printing press in the washing operation and it is transported onward onto the takeup drum. The washing operation is controlled by detecting, with a sensor system, a transport distance of the washcloth and furnishing, with the sensor, a transport distance signal. The system is initialized by checking whether or not the insert is present and/or whether or not the insert carries enough fresh washcloth. This is done by winding the washcloth forward and back by a given distance. During the ongoing washing operation the transport speed of the washcloth is continously determined from the transport distance signal and comparing with a predetermined lower value and a predetermined upper value.

Abstract: A cleaning device for cleaning a recording material bearing member has a surface contacting with the recording material bearing member. The surface as a non-woven cloth including fibers having an average thickness of below 10 .mu.m and 70% or more of said fibers each has a thickness smaller than 10 .mu.m and a density of said fibers being in a range of 0.05-0.80 g/cm.sup.3.

Abstract: A device for washing and drying printing plates has a run-in table (1) followed by a series of washing, rinsing, conserving and/or gumming and drying stations (2, 3, 4, 5), and pairs of rolls (10, 11) arranged in the various stations with a horizontal axis of rotation and a roll slit that lies at the level of the run-in table (1). At least one roll of each pair of rolls (10, 11) may be driven so as to feed the printing plates engaged by the rolls (10, 11) through the roll slit. The device finally has a run-out table (6). In all stations (2, 3, 4, 5) are provided longitudinal guiding means (12) aligned in a common line together with the conveyor (26) of the pairs of rolls (10, 11) All longitudinal guiding means (12) lie either above or below the roll slit and delimit after the roll slit an obstacle-free passage through all stations (2, 3, 4, 5).

Abstract: A cleaning system for removing contaminants from the surface of a roller. A stationary cleaning pad is forced at a first urging force against a roller to be cleaned, and the roller is driven in rubbing contact with the pad. Preferably, the pad is supplied continuously with a cleaning liquid. An actuator disposed against a portion of the back of the pad urges that portion against the roller at a second, greater urging force to accelerate the rate of cleaning. A control loop between the roller motor drive and the actuator responds to a signal from the drive indicative of the magnitude of frictional resistance between the roller and the pad and increases or decreases the second force furnished by the actuator to provide a predetermined constant frictional resistance during cleaning. If flow of cleaning liquid to the pad is lost, friction can build up quickly and the roller surface can become damaged.

Abstract: The nonpolymerized portion of the resin on a photopolymerizable resin is recovered from a printing plate by squeezing the liquid resin off of the plate with the doctor roller. The plate is mounted on a drum and the drum is caused to rotate in a predetermined direction while the doctor roller is pushed against the surface of the plate. The liquid resin falls from the plate into a collection tray. The collection tray is divided into opposite adjacent resin repository sections, with a separate doctor roller being disposed above each repository section of the collection tray. Incompatible resins can be squeezed into the respective repository sections of the collection tray by the respective rollers by selectively rotating the drum in one direction or the other, and by selectively engaging the plate with one of the rollers while keeping the other roller away from the plate.

Abstract: A printing-plate dust removing apparatus includes a guide rail 12 provided in parallel with a plate cylinder 1; a slider 13 moving along the guide rail 12; a holder 18 supported by the slider 13; a moving member 19 supported by the holder 18, the moving member 19 having a plurality of dust removing blades 28; and a driving gear for shifting the moving member 19 intermittently. A driving shaft 38 of the driving gear is connected with a driven shaft 27 through coupling members 41 and 42. Interlocking claws 41A and 42A of the coupling members are set so that the coupling members are engaged with each other at a standby position of the dust removing blades. Also, the holder 119 and the slider 113 are connected with each other by wedge members 138 and 144 so that the wedge members are firmly engaged with each other by a clamping bolt 147 and a holder plate 140.

Abstract: An apparatus for automatically washing printing units of printing machines with finely perforated rollers, which includes: a hollow body that constitutes the washing water chamber and is anchored laterally and parallel to the color feed tube and has, at its base, a series of nozzles, which are directed towards the inside of the wedge-shaped suction chamber, and a series of similar nozzles which are directed towards the rear part of the suction chamber. A series of nozzles is associated with the color feed tube to direct the color towards the secondary rotating roller and to feed the washing water into the finely perforated roller when printing ends. The apparatus is also provided with wear-preventing pads between the rotating secondary roller and the suction chamber, with pads for axially retaining the secondary roller, and with a device for washing under pressure the opposite ends of the color feed tube, the tubular ends of the washing chamber, and the rings of the finely perforated roller.

Abstract: An apparatus for cleaning printing cylinder comprising a cleaning head 3 is disposed in parallel to the printing cylinder so as to be attachable and dettachable to the overall width thereof, and the cleaning is carried out by pressing said cleaning head 3 against the printing cylinder 1. The cleaning head 3 comprises a cleaning case 9 having a suction port 8 at the upper part thereof and a wind chest 10. The interior of the cleaning case 9 is partitioned into the front 11, the rear 12, and the middle part 13 with respect to the direction of the rotation of the printing cylinder 1, with the front 11 and the rear 12 being, respectively, fitted with cleaning members 14, 15 and the middle part 13 being fitted with a lip 16 composed of an elastomeric material. Between the lip 16 and the front 11 and beneath the rear 12 there are formed slits 17, 18 which have suitable gaps, and both of them communicate with the wind chest 10.

Abstract: A paper surface cleaning device for cleaning a surface of a printing paper running before being fed to a printing portion of a printing machine, which comprises a cleaning sheet having a water holding capacity in contact with the surface of the printing paper with a difference in running velocity between the printing paper and the cleaning sheet, a dampening roller which has, at its surface, a wettability so that water is attached to the surface of the dampening roller and which functions to push the cleaning sheet onto the surface of the printing paper, and a water pan into which the dampening roller is dipped partially. An even water film can be formed on the surface of the dampening roller to enable the cleaning sheet to get wet uniformly in its widthwise direction.

Abstract: A cylinder cleaning apparatus for a printing press includes a cleaning cloth, a plate, and a cylinder and a rod. The cleaning cloth is brought into contact with the circumferential surface of a blanket cylinder to wipe a foreign matter on the circumferential surface of the blanket cylinder. The plate is arranged to oppose the circumferential surface of the blanket cylinder through the cleaning cloth, is deformed in accordance with a radius of curvature of the circumferential surface of the blanket cylinder, and has a reaction force against the circumferential surface of the blanket cylinder. The cylinder and the rod press the plate against the circumferential surface of the blanket cylinder, thereby bringing the cleaning cloth into contact with the circumferential surface of the blanket cylinder at a predetermined contact pressure.

Abstract: An offset printing press, having a raised horizontal catwalk platform along one longitudinal side, uses a spray powder to help keep them separated within a stack of sheets in a sheet discharge section of the press. Only a portion of the spray powder is used and excess spray powder is present in the air as powder-laden air. The present invention comprises a system for removal of excess spray powder from the powder-laden air and includes a containment chamber, a powder removal section and an air handling unit. The containment chamber is formed by providing first and second side panels which combine with a rear panel of the sheet discharge section to provide a general containment for removal of powder-laden air from the sheet discharge section. A downward flow of air through at least one exhaust vent into a filter unit of the powder removal section is made possible by the air handling unit.

Abstract: Wash-up device for an inking unit of a printing press, including guide bar brackets disposable on a frame of the printing press, is provided with holders for the wash-up device insertably received in the guide bar brackets, the holders being formed by end zones of an actuating shaft for displacing the wash-up device into engagement with a roller of an inking unit to be washed; the actuating shaft, when received in an inserted position in the guide bar bracket, being turnable out of an assumed angular position thereof, for effecting engagement of the end zones of the actuating shaft behind steps formed in the guide bar brackets, so as to fix the wash-up device in an insert position, the actuating shaft being further turnable for effecting engagement by the wash-up device with the roller of the inking unit to be washed.

Abstract: Cleaning device for a cylinder of a printing press wherein the cylinder is formed with at least one cylinder gap open at the cylinder circumference and extending in the direction of the cylinder axis, the cleaning device including a beam-type cleaning tool extending over the length of the cylinder gap and disposed so as to be movable transversely to the cylinder axis against the cylinder and into the cylinder gap, includes a swivel shaft disposed parallel to the axis of the cylinder, the cleaning tool being connected to the swivel shaft so as to be swivelable thereabout into engagement with the cylinder and into the cylinder gap for brushing against walls defining the cylinder gap and removing adhering dirtied cleaning liquid therefrom.

Abstract: An apparatus for cleaning the cylinders of the printing units of a printing machine is disclosed. The cleaning apparatus is provided with three subassemblies. Specifically, it includes a cleaning subassembly having at least one washing roller for washing the cylinder to be cleaned. The cleaning apparatus also includes a conveying subassembly for transporting the cleaning subassembly into and out of the printing unit. The conveying subassembly is dimensioned to slide into the service orifice in the frame of the printing unit while supporting the cleaning subassembly.

Abstract: A system for axially reciprocating a tacky roller (contact cleaning roller, or CCR) across a substrate being cleaned by the roller, to spread particles which are non-uniformly distributed on the substrate surface over a broader area of the tacky roller collecting surface, thereby decreasing the rate of decay of collecting efficiency, improving the average cleanliness of the treated substrate, and extending the operating lifetime of the tacky roller between renewals. The roller may or may not be in contact with the substrate surface during reciprocation of the roller. The system includes a second CCR to alternate with the first CCR, such that at least one roller is cleaning the substrate while another roller is being renewed. The system can be configured to provide full-width CCRs which overlap both edges of a surface at all times during reciprocation.

Abstract: The present invention relates to a device for removing ink, water and contamination build-up on an ink roller in a printing press. The present invention also relates to a device for scavenging unused ink from an ink roller in a printing press, to allow the return the unused ink to the ink fountain. One embodiment of the invention includes a movable scraper blade having a gap corresponding to the lithographic or printing area of the ink roller. In this embodiment, the blade scrapes ink and/or water off of the ink roller only in the areas adjacent the lithographic or printing area. In another embodiment, a scraper blade is constructed of a series of blade segments, with each blade segment being independently actuatable through an actuator. This embodiment allows the scraping area or areas to be adjusted by simply controlling the appropriate actuators for the blade segments corresponding to the scraping area.

Abstract: A dual substrate, single-pass printing process prints a high basis weight substrate and a low basis weight substrate. Ink striking through the low basis weight substrate is collected and absorbed by the high basis weight substrate. The printed substrates are then separated and rewound for subsequent transport and handling.

Abstract: A method and apparatus for the contact-free removal of dirt in the form of residues of ink, fibers and dust on rotating cylinders in a printing machine by means of a laser beam which is directed onto the surface to be cleaned.

Abstract: A cleaning apparatus for the inking mechanism of an offset printing machine including an ink fountain roller, an ink lifter roller and ink take-off roller associated with an ink roller train wherein the ink lifter roller is journalled for rotation on one end of a lever arm pivotally supported intermediate the ends thereof by an eccentric coupling. A working cylinder and an articulated link rotate the eccentric coupling and move the lever arm and ink lifter roller between a cleaning position, wherein the ink lifter roller simultaneously contacts the ink fountain roller and the ink take-off roller, and a printing position, wherein the lever arm pivots about the eccentric coupling to oscillate the lifter roller between contact with the ink fountain roller and the ink take-off roller.

Abstract: A washing apparatus for a printing roll, particularly a flexographic printing roll having raised printing areas. The washing apparatus includes a troughlike housing provided with an open mouth positioned adjacent the peripheral surface of the printing roll. The housing, surrounding the open mouth, has sealing strips which engage the print roll surface. First and second nozzles are mounted in the housing for respectively discharging streams of cleaning liquid and rinsing liquid against the periphery of the roll as it moves past the mouth of the housing. A brush is positioned within the housing for contacting the print areas on the roll generally between the regions contacted by the nozzle streams. The liquid and debris collect within the housing, and are sucked therefrom for exterior discharge.

Abstract: Cleaning apparatus for cleaning a lithographic plate mounted to a rotary plate cylinder comprises an endless belt having a segment extending close to and substantially parallel to the cylinder. Plate cleaning pads are mounted to the belt all along the belt and a motor advances the belt along the cylinder. When cleaning, a bladder is caused to inflate thereby pressing the belt segment and cleaning pads thereon against the plate mounted to the plate cylinder while the cylinder rotates.

Abstract: A method for cleaning a rotating cylinder in a printing machine, such as the rubber-blanket or impression cylinder, is disclosed. In accordance with the present invention, the printing machine includes a washing roller for engaging and cleaning the rotating cylinder. The washing roller is rotated in the same direction as the direction of rotation of the rotating cylinder during at least part of the period in which the washing surface of the washing roller engages the rotating cylinder. Preferably, the washing roller is first rotated in a direction opposite to the direction of rotation of the rotating cylinder, then reversed to rotate in the same direction as the direction of rotation of the rotating cylinder.

Abstract: A shop towel is wrapped around a retainer having a base with a ratchet bar extending upwardly from one surface of the retainer base. The ratchet bar extends into a recess of a handle of a body portion having a contoured surface for receiving at one end the retainer and at the opposite end the hand of an operator. The ratchet bar is advanced into engagement with a spring actuated-pawl that extends transversely through the handle body portion. The pawl is axially movable in the handle and maintained by a spring in engagement with the ratchet bar. The ratchet bar is freely advanced into the recess and engaged by the pawl to maintain the retainer movably connected to the handle body portion. The engagement of the pawl with the ratchet bar prevents the retainer from being inadvertently disconnected from the handle until the pawl is pulled by a lever out of contact with the ratchet bar.

Abstract: A printing press having one or more printing stands, wherein such a printing stand includes: a plate cylinder for having mounted thereon a printing plate; an inking unit which includes ink applicator rollers for applying ink to the printing plate; a blanket cylinder for receiving an ink impression from the printing plate; a drum for carrying a printed sheet; and a washing device for removing dirt particles adhering to the outer cylindrical surfaces of the cylinders involved in the printing process. The washing device comprises a supply roll on which the clean washcloth is wound up, a pressing-on element for pressing the washcloth on the cylinder to be cleaned, a subsequent take-up roll for taking up the dirty washcloth, side parts receiving the rolls and the pressing-on element on both sides thereof, and a drive mechanism for conveying the washcloth.

Abstract: A cleaning card for a card-printing machine associated with a station for the electrical customization of the cards. The cleaning card has dimensions substantially identical to those of the cards to be printed, and is coated with two cleaning flat pads. The first cleaning flat pad, on both sides of the card, collects and retains various types of dust and dirt. The second cleaning flat pad, on the face designed to receive the electrical customization at the locations defined by the standards, is adapted to the cleaning of the landing contacts.

Abstract: A cylinder cleaning apparatus for a printing press includes a cleaning cloth, a plate, and a cylinder and a rod. The cleaning cloth is brought into contact with the circumferential surface of a blanket cylinder to wipe a foreign matter on the circumferential surface of the blanket cylinder. The plate is arranged to oppose the circumferential surface of the blanket cylinder through the cleaning cloth, is deformed in accordance with a radius of curvature of the circumferential surface of the blanket cylinder, and has a reaction force against the circumferential surface of the blanket cylinder. The cylinder and the rod press the plate against the circumferential surface of the blanket cylinder, thereby bringing the cleaning cloth into contact with the circumferential surface of the blanket cylinder at a predetermined contact pressure.

Abstract: In order to facilitate the removal of ink and other material commonly used in flexography and rotogravure processes, an automated apparatus and method for cleaning a printing cylinder in a tank is disclosed. The tank is adapted to receive a printing cylinder that is to be cleaned of a dried ink on a surface thereof and a cleaning solution in an amount sufficient to substantially immerse the printing cylinder. It also includes a sprayer within the tank for spraying the surface of the printing cylinder with the cleaning solution and wheels within the tank for rotating the printing cylinder as the sprayer is spraying the surface thereof. The method includes the steps of providing a tank for receiving a printing cylinder that is to be cleaned and substantially immersing the printing cylinder in a cleaning solution within the tank.

Abstract: A web printing press and a method of reducing ink build-up on a printing cylinder of a web printing press are described. The web is moved sideways, either by web guides or by moving a web roll stand, during a printing cylinder wash operation to aid in removing ink build-up.

Abstract: Cleaning device for cylinders of a printing press having a cleaning cloth which is unwound from a replaceable supply roll on a clean-cloth spindle, guided over a pressure pad movable towards the circumference of a cylinder, and wound onto a soiled-cloth spindle, and a reversible drive for feeding the cleaning cloth in sections and partially retransporting the cleaning cloth, as well as rewinding the cleaning cloth from the soiled-cloth spindle onto the supply roll of the clean-cloth spindle, includes an electric motor electronically controllable so as to be reversible in direction of rotation, a gear wheel drivingly connected to the electronically controllable electric motor so as to be reversible in direction of rotation with the electric motor, a gear wheel drivingly connected to the clean-cloth spindle, a gear wheel drivingly connected to the soiled cloth spindle, and a coupling device automatically activatable for selectively bringing the gear wheel reversible in direction of rotation alternatively into m

Abstract: A printing machine spray device for moistening surfaces of cylinders, rolls, rollers which are rotating around a transverse axis of the machine and/or for moistening the material being printed which is moving in the longitudinal direction of the machine. The liquid is sprayed by two sprayers onto the surface to be moistened while the two sprayers are being moved in respective opposite directions transversely over the surface. Each sprayer starts from a different respective longitudinal side of the machine. Controls determine the on-off delivery of spray, the speed of sprayer motion, the starting positions of each of the sprayers and may adjust these for machine parameters. Automatic dosing of a specific quantity during one spraying is provided. The input to a sprayer may be from one of selected sources.

Abstract: A rotary printing press has a washing mechanism for washing ink residue off of the roller arrangement therein. The washing mechanism has a washing medium applicator and an arrangement of rollers which comprises a roller that can be positioned to split the flow of washing medium into two paths to direct the flow in essentially the shortest route possible to the distribution rollers located at the plate cylinder. The washing mechanism can also have a doctor-blade device for scraping the soiled washing medium from the rollers, and the doctor-blade device can be activated by the same mechanism which activates the positioning of the roller which splits the flow of washing medium.

Abstract: An improved apparatus and method for cleaning one or more of the rollers used in printing presses. Typically, the printing press features manual or automated devices for supplying cleaning solvent to the press during a washing operation. A blade assembly is pivotally disposed for engagement with the press roller. The blade assembly features a blade unit for scraping solid and liquid debris from the roller, and a receptacle trough for collecting used solvent as well as solid and liquid debris. In the improvement, a sheathing system is provided to supply protective sheath material to cover the blade assembly to keep the blade assembly clean during the washing operation. The sheath material preferably has a low coefficient of friction to prevent wearing of the components and is relatively thin to maintain the blade geometry for effective cleaning of the roller.

Abstract: Washing device for cylinders of a printing press including an exchangeable supply reel mounted on a clean-cloth spindle and having a cleaning cloth running off therefrom, a pressure pad for pressing the cleaning cloth against a circumferential surface of a respective cylinder of the printing press, a dirty-cloth spindle onto which the cleaning cloth is windable, and a drive mechanism for sectionally feeding the cleaning cloth and for rewinding the cleaning cloth from the dirty-cloth spindle onto the supply reel on the clean-cloth spindle, is provided with a device for automatically pulling the cleaning cloth into the washing device, respective deflector members disposed on the clean-cloth spindle and in vicinity of the pressure pad, the pulling device including at least one traction device endlessly revolvable over the deflector members, a gripper device carried by the traction device for gripping a leading edge of the cleaning cloth running off the supply reel, and a device disposed in vicinity of the dirty-

Abstract: A cleaning apparatus for a printing press includes a cleaning unit, apparatus frames, a locking member, and air cylinders. The cleaning unit has a supply roll on which a web for cleaning a cylinder/roller is wound and a take-up roll for taking up the web drawn from the supply roll, and rotatably supports the supply and take-up rolls. The apparatus frames detachably support the cleaning unit. The locking member fixes and holds the cleaning unit on the apparatus frames. The air cylinders are fixed on the apparatus frames and rotate the take-up roll in a direction to take up the web.

Abstract: An apparatus for erasing a plate cylinder of an offset printing press includes a first guide unit which is mounted to the offset printing press apart from the plate cylinder and which extends in an axial direction of the plate cylinder. A mounting unit includes at least two spaced mounting members mounted on the first guide unit, an elongated base plate spanning and fixed to the mounting members, and a sliding-plate assembly mounted longitudinally and movably on a top surface of the base plate for holding an erasing member which is used for erasing impurities on the plate cylinder. A pair of second guide units are mounted respectively and securely to two opposite transverse ends of the elongated base plate for guiding movement of the sliding-plate assembly on the elongated base plate in a direction toward the plate cylinder.

Abstract: An apparatus for printing images on sheet material has a housing, a roller platen mounted within the housing for supporting the sheet material, and a print head mounted adjacent to the platen for receiving the sheet material between the platen and the print head and printing images onto the sheet material passed between the platen and the print head. Two first wiper-blade assemblies are mounted on either side of the roller platen relative to each other, and each wiper-blade assembly has at least one wiper blade extending across the width of the :sheet material defining an edge portion contacting the sheet material, for continuously removing dust particles and other debris from the sheet material prior to passage between the print head and the roller platen. A donor web bearing printing ink is interposed between the print head and the sheet material for forming graphic images on the sheet material by transfer of ink from the donor web to the sheet material.

Abstract: Device for selectively cleaning a plurality of cylinders of a sheet-fed printing press includes a washing device having equipment forming a cleaning surface, and a mutual pressure device for selectively bringing the cleaning surface into contact with one of the cylinders along a line of contact of the cleaning surface and the one cylinder extending parallel to a longitudinal axis of the one cylinder, and drive device for moving the cleaning surface so as to vary the position of the contact line with respect to the cleaning surface.

Abstract: A blanket cylinder cleaning apparatus includes a pressure pad for pressing a cleaning fabric against a rotating blanket cylinder in a printing press to wipe away unwanted matter such as residual ink on the peripheral surface of the blanket cylinder. The pressure pad is hollow and filled with gelatinous viscoelastic material to stably bring the cleaning fabric into adequate contact with the blanket cylinder to efficiently clean the blanket cylinder. The viscoelastic material is solated with heat and readily injected into the inside space of the pressure pad.

Abstract: A cleaning unit for cleaning ink-carrying surfaces in printing units of rotary printing machines comprises a supply reel carrying a web of washcloth; a take-up reel for receiving washcloth from the supply reel; a drive for driving the take-up reel and a coupling for mechanically coupling the take-up reel with the drive; a pivotable guide element, the guide element deflecting the web of washcloth extending between the supply and take-up reels; and a device for simultaneously pivoting the guide element towards a surface to be cleaned and for transporting a portion of the web of washcloth from the supply reel to the take-up reel.

Abstract: A printing cylinder cleaning apparatus includes a brush roller having brush fibers planted on its outer surface and opposed to a printing cylinder for movements to and away from a position where the brush fibers contact a surface of the printing cylinder, and includes a rotational driver for rotating the brush roll. The brush roller is contained in a casing which also contains a scraper for biting contact with the brush roll and a dust collector for receiving dust removed by the scraper. The scraper is rotationally supported to casing to follow and rotate with rotation of the brush roll or to be rotationally driven by a motor. The scraper may be an elongated polygonal bar twisted in an intermediate portion, or having a splined or knurled outer circumferential configuration.