Abstract: A washing apparatus for cleaning the surface of cylinders in a printing machine includes a fresh-cloth roller, a washing roller and a dirty-cloth roller. A washing cloth is transported from the fresh-cloth roller via the washing roller to the dirty-cloth roller. A spring-band freewheel in the form of a helical coil spring is wound non-positively on the shaft of the fresh-cloth roller. The spring-band freewheel free-wheels during the rotation of the shaft in the direction of tension applied to the washing cloth and blocks the shaft from rotating in the opposite direction. The necessary cloth tension is guaranteed, at the same time, by means of the resilient effect of the spring-band freewheel.

Abstract: An apparatus for cleaning cylinders of a rotating drum printing machine has a cleaning cloth, which can be unwound, and a contacting body. The cleaning, which otherwise is carried in fixed time regions, for which precisely dimensioned cloth sections can be made available, is changed to a measure, which is carried out with an alternating contacting pressure of the contacting body and a quasi continuous advance of the cloth. In the contacting zone, the cloth is taken hold of directly and pulled. An oscillating mechanism, which is preferably realized pneumatically, is provided for the alternating contacting pressure.

Abstract: Device for washing an inking unit provided at a printing machine. A doctor-blade device is provided at a distributor roller of an arrangement of rollers positioned before the split in the primary ink flow, while at least another doctor-blade device is provided at a distributor roller among a set of inking rollers supplying a secondary branch of the primary ink flow to a rearwardly disposed set of ink applicator rollers, as viewed in the direction of rotation of the plate cylinder.

Abstract: A printing cylinder/roller cleaning apparatus for a printing press includes a cleaning cloth, a take-up shaft, a supply shaft, a ratchet wheel, a lock member, a swing lever, a one-way clutch, and an air cylinder. The cleaning cloth is pressed against a circumferential surface of a rotating printing cylinder/roller. The take-up shaft takes up the cleaning cloth. The supply shaft supplies the cleaning cloth. The ratchet wheel is coaxially mounted on the supply shaft. The lock lever is engaged with the ratchet wheel when the cleaning cloth is not taken up. The swing lever is coaxially mounted on the take-up shaft and rotated to actuate the lock lever, thereby releasing engagement between the ratchet wheel and the lock lever. The one-way clutch connects the take-up shaft with the swing lever only in a direction to take up the cleaning cloth. The air cylinder pivots the swing lever in response to a cleaning operation of the printing cylinder/roller.

Abstract: A device for cleaning the solution used for washing a printing press cylinder wherein the washing solution is conveyed in a circuit and cleaned by a distillation device to separate out ink residues followed by a gravity separator to separate the washing solution into its water and solvent constituents. Only small amounts of ink residues are produced in the distillation device and can be disposed of without difficulty as industrial waste. The cleaning procedure is also very efficient because, after being cleaned and separated, the water and solvent constituents of the washing solution can be separately and successively supplied to the cylinder to be washed.

Abstract: A rotating brush cleaning system is provided for removing debris, lint and ink from components of printing devices. Operation is effected by an air cylinder which periodically urges a rotating spiral brush cleaner against the component of the printing device and retracts the cleaner from the component of the printing device. The action of the cleaner in combination with rotation of the component of the printing device is such as to loosen dust and lint from the component, which dust and lint is then drawn into a vacuum system that surrounds the cleaner.

Abstract: According to the present invention, even when a position of a printing cylinder is changed, a relative distance to a cleaning unit is invariable. Hence, a contact pressure of the cleaning unit with the printing cylinder is always kept constant. Movable plates are supported on a fixed plate and drivable in reciprocation towards and away from the printing cylinder by an actuator. A first movable plate is mounted with a positioning roller capable of rotationally contacting a bearer of the printing cylinder, thereby positioning the cleaning unit mounted on the second movable plate. The second movable plate is provided with a contact pressure adjusting mechanism of the cleaning unit. Even when changing a rotational center of the printing cylinder by the positioning roller rotationally contacting the bearer, the cleaning unit can be always set at a constant contact pressure.

Abstract: A cleaning device is disclosed for an offset printing machine for quickly removing stains on a printed matter. A number of scrapers (7) are arranged in an axial direction of the surface of a printing drum (1) of the offset printing machine. The scrapers (7) are held by rods of air cylinders (8) which cause the scrapers to contact or be separated away from the surface of the drum (1). Solenoid valves are arranged corresponding to respective cylinders. The solenoid valves are controlled by a control unit (16). The position of hickey on the surface of the drum is designated from an information of a hickey position on the printed matter generated corresponding to the stain on the surface of the drum. When the associated solenoid valves are actuated, then the scrapers are brought into contact with the hickey position on the drum surface to scrape the hickey.

Abstract: A printing cylinder/roller cleaning apparatus for a printing press includes a brush roller, a cleaning cloth, and a cam and a roller. The brush roller is pressed against the circumferential surface of a printing cylinder/roller having a gap in a part thereof to scrape contamination therefrom. The cleaning cloth is pressed against the circumferential surface of the printing cylinder/roller to wipe scraped contamination. The cam and roller position the brush roller in a radial direction of the printing cylinder/roller, thereby retreating the brush roller from the gap.

Abstract: A sheet-cleaning apparatus for cleaning a sheet (6) that is to be printed, before it runs into the printing mechanism (2) of a sheet-fed printing press. A backing cloth (20), which is contacted with the sheet (6) that is to be printed with the help of the positioning means, is used to clean the sheet (6) that is to be printed. A transporting apparatus (26, 24, 28) transports the backing cloth (20), so that other moist sections (32) of the backing cloth (20) are consecutively brought into contact with the sheet (6) that is to be printed.

Abstract: An apparatus for cleaning a printing machine cylinder or the like by pressing a cleaning cloth against the outer periphery of the cylinder or the like is disclosed. The apparatus includes a cloth unit assembly including a cloth cassette and a cloth unit. The cleaning cloth is accommodated in the cloth cassette, and the cloth unit has a space for accommodating the cloth cassette. The cloth unit is provided with pressurizing means for pressing the cleaning cloth fed from the cloth cassette against the cylinder or the like. The cloth cassette has an engagement projection specifying the kind of the cylinder to be cleaned, while the cloth unit has an engagement projection matched to the engagement recess of the cloth cassette.

Abstract: The present invention provides an improved cylinder cleaning mechanism for cleaning the circumference of a cylinder of a printing press. The cylinder cleaning mechanism comprises, as principal components, a cylinder cleaning unit having a pressure blade for pressing a cleaning cloth against the circumference of the cylinder, and a cylinder cleaning unit operating mechanism comprising a fluid-operated actuator for shifting the cylinder cleaning unit between a cleaning position where the cleaning cloth is pressed against the circumference of the cylinder with the pressure blade and a standby position where the cylinder cleaning unit is separated far away from the circumference of the cylinder, and a mechanism for transmitting the action of the fluid-operated actuator to the cylinder cleaning unit.

Abstract: A screen wiper assembly for cleaning the underside of a printing screen in a microcircuit thick film printer. The assembly includes a wiper blade, a movable arm for moving the wiper blade under the printing screen, and a guiding cam and roller for guiding and controlling the movement of the wiper blade.

Abstract: A vacuum blanket cleaning system is provided for removing dust, lint or ink from a blanket cylinder in an offset printing press during the uninterrupted course of a press run. Operation is effected by an air cylinder which periodically urges a cleaner against the blanket cylinder and retracts the cleaner from the blanket cylinder for replacement or maintenance. The action of the cleaner in combination with rotation of the blanket cylinder is such as to loosen dust and lint from the blanket cylinder, which dust and lint is then drawn into a vacuum system that surrounds the cleaner.

Abstract: A drag roller device for a printing apparatus comprises a cleaning means for cleaning a drag roller. The cleaning means is in contact with a part of the circumferential surface of the drag roller except for the circumferential area around which a printed continuous sheet fed from a printing section is wound. The cleaning means may be movable within the circumferential area of the drag roller or separable from it. The cleaning means may be supplied with a cleaning liquid.In the drag roller device thus constructed, the cleaning means can remove various stains and/or spots of ink transferred from the circumferential surface of the drag roller and/or additional rollers at each revolution of the drag roller. This cleaning operation of the cleaning means ensures to prevent the printed surface of the continuous sheet succeedingly fed from damaging with the stains and spots of ink from the drag roller and so on.

Abstract: A dry brush cleaning apparatus and method for cleaning printing press blanket cylinders is disclosed. In one embodiment, the invention comprises a frame spanning the width of the working surface of the blanket cylinder; a plurality of rollers, at least one of which is secured to each end of the frame, the rollers being positioned to straddle the blanket and engage the bearer surfaces of the blanket cylinder, at least one of the rollers being a drive roller; a cleaning brush rotatably mounted on the frame; a drive interconnecting the drive roller and the cleaning brush to cause power developed by frictional engagement of the drive roller and the bearer surface to impart rotation to the cleaning brush; and a mechanism for delaying a cleaning engagement of the cleaning brush with the blanket cylinder until after power generated by frictional engagement of the drive wheel with the bearer surface has caused the cleaning brush to begin rotating.

Abstract: To clean dusts from a printing cylinder of a blanket, an impression drum or the like can be simply discharged with no adhesion in a casing of a cleaning machine. A cleaning device incorporates a rotary brush in the casing which is disposed opposite to the printing cylinder. An opening is formed in a cylinder confronting portion of the casing, and the cylinder surface can be cleaned by the brush, with some portion of the brush fronting. Provided in the casing is a scraper for eliminating the adhered substances while contacting the brush. A dust discharge port is formed in the wall surface of the casing, and an air blowout means for forming an air layer is provided in the bottom portion of the casing. The dusts taken in by the brush are carried through the air layer to the discharge port while floating the dusts and can be discharged from the discharge port.

Abstract: A printing press wash-up system is disclosed comprising a fluid receptacle arrangement, a mounting assembly, a wiper assembly, and a pivoting arrangement. The fluid receptacle arrangement is constructed and arranged to operably receive fluid from a printing press roller when it is mounted to the printing press by means of the mounting assembly. The wiper assembly selectively removes fluid from the printing press rollers in operable association with the fluid receptacle arrangement to direct fluid from the roller to the fluid receptacle arrangement. The pivoting arrangement selectively pivots the fluid receptacle arrangement between a first and second extreme position, the first extreme position occurring when the fluid receptacle arrangement is operably positioned to selectively receive fluid from the printing press roller and the second extreme position occurring when the fluid receptacle arrangement is positioned such that it cannot selectively receive fluid from the printing press roller.

Abstract: A cleaning apparatus and method for cleaning a print band utilizes a self-contained housing with pulleys arranged vertically or horizontally. One of the pulleys is motor driven at relatively low speed. A print band to be cleaned is installed around the pulleys in the housing and is urged toward a high-speed rotating brush by a spring-biased pressure plate. Air jets can be used downstream of the brush station to dry cleaning solution that remains on the print band.

Abstract: A printing cylinder is disclosed which makes it possible to remove the ink adhering to the side surfaces of the printing cylinder after the printing has been finished without the need of moving the printing cylinder.

Abstract: A mechanism for selectively engaging the doctor blade in a washer for the blanket cylinder of a printing press. The mechanism permits independent control of doctor blade engagement and, through the use of a plurality of adjustably mounted fluid pressure actuators spaced along the length of the doctor blade, facilitates accurate blade alignment, thus preventing non-uniform wear of the doctor blade and the washer roller.

Abstract: The present invention relates to a novel method and apparatus for cleaning off the ink sediment and paper powder and the like which adhere to a cylinder such as a blanket cylinder in a printing machine, without using any cleaning solution. A brush roll rotated by an independent rotational driving source is brought into contact with a blanket cylinder during printing. The brush roll has many brush fibers which are planted in the outer periphery thereof and which are bent at the ends thereof so as to have a combing function. This is realized by bending the brush fibers in zigzags. It is preferable that the rotational directions of the blanket cylinder and the printing cylinder are opposite to each other, and the relative rotational speed is set to 5 to 12 m/s. The dry brush roll is surrounded by a casing in which a scraper for removing dust from the brush fibers and a dust collecting portion are provided, or to which negative pressure function means is connected so that the dust can be easily removed.

Abstract: A screen printer which has a cleaning device for cleaning a mask which is formed with at least a hole of a printing pattern. The cleaning device includes a spatula member and an airstream generating device. The spatula member is moved along the surface of the mask in contact therewith so as to scrape ink adhered to the mask surface. The airstream generating device generates an airstream passing through the hole of the mask so as to remove ink within the hole of the mask.

Abstract: An ink cleaning apparatus for a rotary printing press includes a blade shaft, a rewind roller, a take-up roller, a hygroscopic band member, and a doctor blade. The blade shaft is pivotally supported to be parallel to an ink roller near the ink roller. The rewind roller and the take-up roller are respectively supported in parallel to the blade shaft. The hygroscopic band member is rewound from the rewind roller and taken up by the take-up roller after being brought into contact with the blade shaft. The doctor blade is fixed on the blade shaft. The distal end portion of the doctor blade is brought into contact with an outer surface of the ink roller upon pivotal movement of the blade shaft in one direction. The flat surface of the doctor blade which is attached with a waste liquid is brought into tight contact with the band member upon pivotal movement of the blade shaft on the other direction.

Abstract: This invention is a cylinder impurity remover apparatus mountable on a printing press assembly and having a wiper blade assembly to contact a rotating printing plate cylinder member to remove dust and impurities therefrom. The cylinder impurity remover apparatus includes 1) a main support assembly secured to the printing press assembly; 2) a remover actuator assembly mounted on the main support assembly; 3) a wiper blade assembly connected to an outer end of the remover actuator assembly; and 4) an actuator control assembly connected to the remover actuator assembly for operation thereof. The remover actuator assembly includes a spaced pair of main actuator assemblies, each having the wiper blade assembly connected to an outer end of the main shaft member.

Abstract: A non-contact web cleaning apparatus has a pair of guide rollers over and under which a paper web is run and two cleaning heads, each for cleaning a respective one of the two opposite sides of the moving paper web. Each cleaning head has a pressure slot for directing compressed air against the moving paper web as it passes around a respective one of the guide rollers and a vacuum slot for carrying away particles dislodged from the paper web by the pressure slot flow. The two cleaning heads are pivotally mounted about fixed axis so as to be displaceable relative to the guide rollers, and hence to the path of the paper web, between first positions in which the heads are disposed in their operational positions relative to the guide rollers for cleaning the paper web and second positions in which the heads are spaced sufficiently far from the guide rollers to facilitate feeding of the paper web therebetween.

Abstract: The wiping device has a trough (4) and a wiping cylinder (2) which is mounted in the mutually opposite side walls (4a) of the trough (4). The trough (4) is itself mounted tiltably about a pivot axis (6) lying at least approximately in that plane (T') which passes through the axis of rotation of the wiping cylinder and which is parallel to the tangential plane (T) of the wiping cylinder (2) and plate cylinder (1) passing through the point of contact between the two cylinders. The pressing force with which the wiping cylinder (2) bears against the plate cylinder (1) can be set and requlated during the printing operation by means of an adjusting device (11, 12, 13) by correspondingly tilting the trough (4) together with the wiping cylinder (2) about its pivot axis (6). At the same time, the pressing forces are transmitted by adjusting rods (7) which are mounted on both sides of the wiping cylinder (2) and which act on the trough (4).

Abstract: A cleaner for rotary bodies such as a blanket cylinder, impression cylinder, ink supply roller and the like includes a cleaning cloth stretched between two supporting points. The cleaning cloth is pressed against the peripheral surface of the rotary body, and a supply means supplies cleaning material to the back of the cleaning cloth. The cleaning cloth is advanced in a direction opposite to the rotation of the peripheral surface of the rotary body to be washed.

Abstract: To rapidly and reliably remove foreign objects from rotating plate cylinders (10, 10'; 10a, 10a') of a printing machine, a carriage (12) is mounted on a keyboard (21) having keys associated with predetermined axial positions or zones on the plate cylinder, controls via a control unit (CU) rotation of the stepping motor to the respective axial zone which is selected by operation of one of the keys (20) of the keyboard. A solenoid then projects the wiper blade to remove a foreign object or hickey from the plate. In a multi-cylinder machine, the removal apparatus including the spindle, carriage, wiper blade and solenoid, is placed in association with each one of the cylinders, one keyboard and one control unit operating all the wiper blades in unison, thereby eliminating the need to determine on which one of the plate cylinders of, for example, a multi-color press, a foreign object has lodged.

Abstract: A cleaning device for a printing press for cleaning a rotating outer cylindrical surface of a roller or cylinder by a cleaning-cloth web having a given width and edges extending perpendicularly to generating lines of the outer cylindrical surface includes a diaphragm subjectible to pressure at one side thereof by a pressurized fluid for pressing a section of the cleaning-cloth web against the outer cylindrical surface, the diaphragm being formed with a raised first surface region matching the given width of the cleaning-cloth web and being engageable with the cleaning-cloth web, the diaphragm having a surface with second surface regions facing towards the cleaning-cloth web, the second surface regions being offset by a step with respect to the first surface region.

Abstract: An offset sheet-fed press is provided with a cleaning apparatus for an impression cylinder. The cleaning apparatus includes a cleaning unit which includes a frame member, a magazine roll provided with a spring brake for a cleaning cloth, a wind-up roll for winding up the cleaning cloth while stepwisely transferring the cleaning cloth by a wind-up torque motor, guide rolls for guiding the cleaning cloth so that the cleaning cloth faces the outer surface of the impression cylinder between the magazine roll and the wind-up roll, and a plurality of air cylinders arranged in parallel and disposed on the rear surface side of the cleaning cloth facing the impression cylinder. The cleaning unit further includes a cleaning cloth press assembly provided with a linear press blade linerally pressing the cleaning cloth against the impression cylinder on the side of the magazine roll, a plate-like guide disposed on the side of the wind-up roll and a surface press pad pressing the surface of the impression cylinder.

Abstract: The present invention provides a method and apparatus for cleaning printing press components with carbon dioxide snow or pellets. Upon impact, the snow or pellets dislodge debris adhering to the components and sublime to a non-hazardous gas. A typical component cleaned by the present invention would be a rotating blanket cylinder of an offset printing press. The snow or pellets are typically conveyed by an air stream under pressure to a moving nozzle, a series of fixed nozzles, or some other dispensing device.

Abstract: A washing device formed as an insert unit on a printing machine for cleaning the outer cylindrical surface of rollers or cylinders includes a washcloth supply roll and a dirty-washcloth take-up roll for a washcloth, a device for saturating the washcloth with washing medium, a device for withdrawing the washcloth from the supply roll by winding the washing device on the take-up roll via an actuable pressure applicator, so that, during a washing operation, the pressure applicator presses the washcloth against a roller or cylinder, the take-up roll being connectible with a feeder device fixed to the machine, the washing device being automatically connectible with a roll-sensing device fixed to the machine when it is slid as an insert unit into position in the machine, an upwardly exposed washcloth section, in the slid-in position, being disposed upstream of a membrane member, as viewed in transport direction of the washcloth, the washcloth section being located beneath a washing-medium dispenser device fixed to

Abstract: A vacuum blanket cleaning system is provided for removing dust, lint or ink from a blanket cylinder in an offset printing press during the uninterrupted course of a press run. Operation is effected by an air cylinder which periodically urges a cleaner against the blanket cylinder and retracts the cleaner from the blanket cylinder for replacement or maintenance. The action of the cleaner in combination with rotation of the blanket cylinder is such as to loosen dust and lint from the blanket cylinder, which dust and lint is then drawn into a vacuum system that surrounds the cleaner.

Abstract: A screen printer comprising a squeegee for applying a printing material to a work face when the squeegee moves on an upper side face of a screen while being kept in contact therewith, a doctor for uniforming a thickness of the printing material left on the upper side face of the screen, and a cleaner including a scraping bucket which moves on the underside face of the screen while being kept in contact therewith so as to scrape the printing material attached to the underside face of the screen upon applying operation of the squeegee. The scraping bucket comprises a bucket body formed into a concave shape with an open top in profile, and a scraping strip formed on an end of one side wall of the bucket body, which is inclined toward an advance direction of the scraping bucket.

Abstract: Device for cleaning at least one of a plate and a blanket cylinder of an offset printing machine, includes a plurality of cleaning elements disposed adjacent one another in a direction parallel to a cylindrical peripheral surface of at least one of a plate and a blanket cylinder; a driving device for positioning each of the cleaning elements towards and away from the at least one cylinder; and an input and control device for actuating a respective cleaning element; and method of operating the device.

Abstract: Washing device of a printing machine for cleaning the outer cylindrical surface of a roller or a cylinder, comprising a supply roll and a take-up roll for a cleaning cloth dampenable with washing medium, means for withdrawing the cleaning cloth from the supply roll by winding it on the take-up roll via an actuable pressure applicator so that, during a washing operation, the pressure applicator, presses the cleaning cloth against a roller or cylinder, the pressure applicator having an elastic membrane member which is sealed with respect to a spacer, and means for forming a compressed-air cushion between the membrane member and the spacer, a holding member for receiving the spacer therein in a manner like that of a sliding block, the membrane member having marginal regions thereof engaging behind guiding projections of the holding member, the spacer being biased towards the guiding projections for sealingly clamping the marginal regions of the membrane therebetween.

Abstract: An apparatus for cleaning a surface of a blanket cylinder of a printing press containing having foreign matter thereon including a brush unit with a rotatable brush roller that is selectively moveable into and out of engagement with the surface to be cleaned. The brush unit includes a flicker bar which is moveable in timed relation to movement of the brush unit between an inoperative position removed from the brush and an operative position engaging the brush roller to effect removal of foreign matter carried by the brush roller.

Abstract: Device for cleaning a textured outer cylindrical surface of a sheet-transfer cylinder in a sheet-fed rotary printing press includes a cleaning device corotatable with the cylinder, the cleaning device being replaceably mounted in the printing press and being bringable into engagement with the outer cylindrical surface of the cylinder at a region of the surface not carrying a sheet.

Abstract: A cleaning system for offset sheet-fed printing presses according to the present invention comprises a magazine roll for reeling-out cleaning cloth to perform the cleaning of the impression cylinder, a take-up roll to take-up this cleaning cloth, a blade provided between the magazine roll and the take-up roll and in contact with the impression cylinder from behind the rear side of the cleaning cloth, and a guide member to bring the cleaning cloth pressed by the blade, into contact around the arcuate circumferential surface of the impression cylinder and in contact along the axial length of the impression cylinder. This cleaning system for offset sheet-fed printing presses additionally comprises a pressing member provided between the blade and the guide portion so as to press the arc-shaped contact portion of the cleaning cloth against the impression cylinder and preferably comprises a blade being provided so as to be freely capable of advancing and retreating with respect to the cleaning cloth.

Abstract: A cleaning apparatus of a blanket of a printing press has a cleaning cloth, a take-up roller of the cleaning cloth, a press device for pressing the cleaning cloth to the surface of a blanket cylinder to be cleaned, and rewinding device for rewinding the used cleaning cloth from the take-up roller to the supply roll for use in the following cleaning cycle. Cleaning is carried out while the cleaning cloth is being supplied from the supply roll to the take-up roller, and part of the used cleaning cloth is rewound after this cleaning cycle is completed by rotating reversely the supply roll and is used again during part of the next cleaning cycle.

Abstract: Method and apparatus capable of automatically cleaning a dampening water supply passage to a plate cylinder in an offset press, as well as an ink supply passage to the late cylinder. The apparatus comprises an operation instruction means producing operation signals in a sequence to driving portions of various means which include ink supply-stopping means, means for supplying a cleaning solvent, cleaning waste recovering means, means for bringing ink supply rollers out of contact with the plate cylinder, means for bringing dampening water supply rollers out of contact with the plate cylinder, and main control means, a start instruction means that starts the operation instruction means, and a manual instruction means. This manual instruction means permits the operator to select either cleaning of only the ink supply passage or cleaning of all the ink supply passage and the dampening water supply passage.

Abstract: In a combination of a cleaning device of a cylinder of an offset sheet-fed press and a cylinder to be cleaned, the cleaning device is provided with a blade member as a cleaning cloth pressing member against the cylinder to be cleaned, the blade member having a relatively sharp edge pressing the cleaning cloth against the cylinder. The cylinder is an impression cylinder provided with sheet holding grippers projecting over the outer peripheral surface of the impression cylinder. The grippers are protected so as not to directly contact the cleaning cloth under the pressed condition by locating cam members to cover the grippers or by locating a cleaning device moving mechanism in a manner such that when the grippers approach the blade member during the rotation of the impression cylinder, the cleaning device is moved away therefrom.

Abstract: A cleaning machine for a printer is provided for cleaning an outer peripheral surface of a cylinder of the printer with a cleaning cloth through a pressure pad mounted through a holder on a mount member supported by side plates of the frame of the printer. The cleaning cloth is moved relative to the outer peripheral surface of the cylinder of the printer. The pressure pad is composed of a projected member made of elastic material. The projected member includes a flange portion, a first projected portion toward the cylinder and a second projected portion projected toward the mount member. The first and second projected portion is symmetric with each other for reversible use, resulting in prolonging the service life of the pressure pad.

Abstract: A blanket cleaner for removing dust, lint or ink from a blanket cylinder in an offset printing press during the uninterrupted course of a press run. A first fluid cylinder periodically urges a brush against the blanket cylinder and retracts the brush from the blanket cylinder. Retraction of the brush permits the dust and lint swept before the brush to fall onto a door of a lint catcher. The door is raised and lowered by action of a second fluid cylinder. Operation of the second fluid cylinder lags the operation of the first fluid cylinder by an interval of time sufficient to permit the dust, lint or ink to fall onto the door. In the preferred embodiment, the structure includes a device for removal of debris from the lint catcher.

Abstract: A device for aftertreating a material web, coated or printed on at least one side thereof, having a drier for heating the material web to vaporize solvents contained therein, a vapor channel connected to the drier and traversible by the material web, and an arrangement of cooling rollers located downstream of the vapor channel, each of the cooling rollers being enveloped by the material web over a region of the circumference of the cooling rollers, respectively, a first one of the cooling rollers located in the travel direction of the material web having a jacket surface thereof facing towards the coated or printed side of the web includes a doctor blade device having a transversing doctor blade engaging a region of the first cooling roller located between an oncoming strand and a departing strand of the material web.

Abstract: A washing device for washing the outer cylindrical surface of a blanket cylinder of an offset printing machine has a first washing roller in rolling engagement with the blanket cylinder, at least during a washing operation, for guiding a washing liquid to the blanket cylinder so as to loosen impurities thereon; a distribution roller for transferring the washing liquid to the first washing roller being in rolling engagement with the first washing roller; an applicator device for controllably applying the washing liquid to the distributor roller; a second washing roller located beneath the first washing roller and being located downstream from the first washing roller as viewed in rotary direction of the blanket cylinder, being in contact with the blanket cylinder at least during the washing operation so as to carry away the loosened impurities from the blanket cylinder; a collecting tub for the washing liquid and the impurities; a transmission system driveably connected to a driving pinion of the printing mach

Abstract: The specification discloses an apparatus and method for cleaning printing screens or the like work surfaces in which solvent is pumped from a reservoir to the surface to be cleaned at a point closely adjacent a vacuum cleaning tool. The vacuum cleaning tool is connected by a vacuum line to the reservoir and vacuum means are provided to draw a vacuum on the reservoir whereby solvent is delivered to the surface to be cleaned and residue laden solvent is vacuumed off the surface to be cleaned through the vacuum tool and vacuum line. A clean up tray and light panel are provided to facilitate the clean up operation. A control assembly comprising independently or simultaneously actionable foot pedals for control solvent feed and vacuum is provided.

Abstract: A rotary press is operated slowly while paper is fed to the rotary press. A washing liquid is applied to the printing paper throughout substantially its entire width to wet the printing paper, and a plurality of guide rollers that are in contact with the travelling paper on the paper discharge side with respect to a printing portion are rotated at a peripheral speed different from that of the travelling paper so that contamination of the guide rollers is wiped off by the travelling paper. The washing apparatus of the invention has a plurality of guide roller driving devices which can drive and rotate the guide rollers at a peripheral speed different from that of the travelling paper.

Abstract: Rubber stamp cleaning apparatus comprising a roll of self-adhesive tape rotatably mounted on a base having a platen upon which a portion of the tape is secured tacky side up. The stamp is cleaned by tamping on the tape.