Abstract: A seal for a chamber doctor blade (12) of a printing machine, with a sealing block (30) of a pliable material, which is inserted at one end of the chamber doctor blade between two doctor blades (16, 18) and closes off an inking chamber (20), bounded by the periphery of an applicator roller (10) of the printing machine, the doctor blades and a housing (14) of the chamber doctor blade, in which the surface of the sealing block (30), facing the applicator roller (10), is covered with a strip (34) of elastic material, which is harder than the material of the sealing block.

Abstract: An improved end-seal carrier assembly for supporting a seal in a seal-type continuous dampener. The seal is supported by a backing plate and pressed against the ends of the dampener's rollers. A carrier shaft is fixedly mounted to the backing plate. A shaft housing is mounted to the sideframe and has a hole extending longitudinally there through into which the shaft is mounted so to rotationally and longitudinally translate with respect to the sideframe. A coil spring is wound about a portion of the carrier shaft and has a first spring end operatively engaging the backing plate and a second spring end operatively engaging the shaft housing. The coil spring is configured to induce both a compressive and torsional bias between the backing plate and the sideframe. The shaft housing is rotatable for winding the coil spring and thereby establishing the torsional bias.

Abstract: A roller assembly (10) is provided which includes an anilox roller (12) mounted with a head (14) for applying a liquid (18) to another surface, such as a delivery, printing plate blanket, or impression cylinder. An end dam (42) is provided at each end of the head (14), which defines a curved seal surface (46) which bears against the bearer surface (58) at each end of the anilox roller (12). The curved seal surface (46) and bearer surface (58) form an end seal for the roller assembly. If desired, lubrication can be provided between the curved seal surface (46) and the bearer surface (58).

Abstract: An ink feeder comprises a plurality of ink tanks for storing inks and wetting water, disposed in a transverse direction of an ink fountain roller, a vane wheel disposed at the bottom of an ink tank, an ink pump for feeding ink, an ink feed blade for adjusting the quantity of ink supplied from the ink pump to the ink fountain roller to a constant value, and a coupling for transmitting the driving force of a single motor to the vane wheel and the ink pump provided to each ink tank. The ink tanks, the ink pump, the ink feed nozzle, the ink feed pipe and the ink feed blade mechanism may be built into one unit, and this unit can be fitted to and removed from the main body of the printing press. The ink feeder may be equipped with an ink scraper comprising scraped ink separators arranged parallel in the axial direction of the scraping doctor support device.

Abstract: A cassette for a wedge-shaped ink well of a printing machine has a bottom and a rear wall and two side walls. A front of the cassette, opposite the rear wall, faces a duct roller of the printing machine when the cassette is inserted into the ink well and is open. A handle connected to the upper portions of the side walls is positioned such that the cassette tends to incline to prevent ink from flowing out of the front of the cassette when the cassette is handled outside of the printing machine. The bottom and the sides of the cassette are sealed against the ink well adjacent to the duct roller. A seating arrests movement of the cassette relative to the ink well when the cassette is inserted in the ink well thus ensuring that the duct roller uniformly inked between sides of the ink well.

Abstract: An on demand ink mixing system for a flexographic or similar printer utilizes a chambered doctor blade with a chamber divided by a flexible bladder to form ink chamber and a pressure chamber. Ink use is coordinated with print run length, and ink mixing and the collapse of the ink chamber to essentially zero volume are coordinated to coincide with the end of the run. The flexible bladder is also utilized in the operation of the ink cleaning system to move cleaning solution through all portions of the supply system and printer contaminated by ink mixed for the run.

Abstract: A doctor blade arrangement for a rinse inking unit of a rotary printing machine consists of a doctor blade carrier formed by a profile strip with a groove type recess. Two doctor blades adjustable at an inking roller are fixed on the doctor blade carrier almost like a roof and parallel to each other. The two doctor blades together with the inking roller, the groove type recess of the doctor blade carrier and sealings materials provided for the same at the end side border a dye chamber. In order to assure a good sealing of the dye chamber against the outcoming dye, the groove type recess is provided with a central middle part forming a main chamber and end-side side parts forming secondary chambers, which are connected with the main chamber through throttle gaps. The tube feeding the dye leads into the main chamber. The side parts are provided with the pipe lines discharging the dye and with the exhaust holes.

Abstract: An ink fountain divider, which is capable of completely preventing leakage of ink and is easy to handle, includes an ink fountain divider body which has an approximately triangular shaped cross-section having a bottom edge having a contour line conforming with the outer peripheral surface of the ink fountain roller, and another edge having a contour line conforming with the an upper surface of the bottom plate, having a given width in a direction parallel to an axis of the ink fountain roller. The ink fountain divider body is formed of a non-magnetic material having a hardness smaller than that of a material forming the outer peripheral surface of the ink fountain roller. The ink fountain divider body contacts with the bottom plate of the ink fountain arrangement for dividing an ink storage space in the ink fountain arrangement.

Abstract: An inking system for a rotary printing press utilizes a chain seal to prevent ink from passing from the ink receiving chamber of an ink reservoir beyond the length of the portion of a cylinder to be inked. A chain seal, that is comprised of a plurality of individual plates and pins, intimately engages the surface of the cylinder and keeps the ink in the ink receiving chamber.

Abstract: A printer which prints information on articles such as filter cartridge assemblies, minimizes ink splattering and increases speed by shielding the lower portion of ink pickup rollers with an ink shielding plate. By utilizing the ink shielding plate, the speed at which the printer operates is doubled and cleanup of splattered ink is minimized.

Abstract: An ink supply unit for a receiving roller of a printing machine. The ink supply unit includes an ink rail mounted in close proximity to the surface of the receiving roller, and a plurality of ink reservoirs mounted one above the other in the ink rail that discharge differently colored inks in accordance with the printing requirements onto the surface of the receiving roller through a valve mechanism. Wiper rollers are mounted adjacent to the surface of the receiving roller to wipe the surface thereof to reduce ink wastage due to misting or the like. The inks are introduced onto the surface of the receiving roller and are mixed to form the required color for printing by the combined action of the wiper rollers and a roller train that links the receiving roller and the print roller in the printing machine.

Abstract: An inking arrangement for printing presses comprises an ink fountain member having at least one fountain-forming face for forming an ink fountain, an ink fountain roller defining an ink channel together with the fountain member and having an outer peripheral surface to be inked through the channel, a plurality of rollers for supplying the ink applied to the peripheral surface of the fountain roller to a printing portion, and a cleaning tank disposed below the fountain member. The cleaning tank is provided with a cleaning blade at least alternatively shiftable to a cleaning position in which the blade is pressed against the peripheral surface of the fountain roller, or to a stand-by position in which the blade is away from the fountain roller. The ink applied to the peripheral surface of the fountain roller through the channel is scraped off by the blade in the cleaning position and collected in the tank.

Abstract: Ink duct of a rotary printing press, having two side walls between which an ink duct blade is arranged, each of the side walls being formed with an arcuate recess at a front end face thereof for bearing against an ink duct roller of the printing press, includes a deformation device disposed at each of the side walls for modifying a contour thereof defining the respective recess formed therein.

Abstract: A roll doctor assembly as dosing element for a coater serving to coat a traveling web (e.g., paper web) features a rotatable doctor bar (14) that extends transversely across the web width. The doctor bar (14) is fitted in a doctor backing (12). The doctor backing (12) extends as well transversely across the web width. According to the invention, the doctor bar (14; 14'; 14") and the doctor backing (12; 12'; 12") are part of a modular system, so that the doctor bar is exchangeable for another with different outside diameter and, consequently, the doctor backing is exchangeable for another with different bearing diameter. The different doctor backings are adapted to one another to the effect that the axes of rotation of the different doctor bars (14; 14'; 14") assume the same position relative to the support beam (10).

Abstract: A doctor blade unit for the inking system of a rotary printing press includes a doctor blade carrier that is formed by a profiled rail with a channel-shaped recess. The doctor blade carrier is provided with two doctor blades that can be screwed to the carrier and moved down on an ink application roller as well as sealing elements at its ends. The face walls on the ends of the ink chamber which carry the sealing elements are provided with holes for accommodating a pipe that is provided with spaced apart holes that form spraying nozzles over its entire length. One end of the pipe is provided with a connection for supplying cleaning fluid.

Abstract: Doctor blade for an offset rotary printing press having an inking unit with an ink duct wherein the ductor blade is provided for, respectively, scraping ink from an ink duct roller and zonally metering an ink film layer thereon over the width of a web of printing material includes a ceramic coating disposed on an edge portion of the blade at a region thereof at which the ink duct roller is in contact therewith.

Abstract: An ink trough for a printing press is formed between two rollers and two side members on opposite ends of the rollers. The rollers can be operated independently for ink removal and cleaning purposes.

Abstract: A chambered doctor blade device intended for a printing unit and adapted to coat a rotatable cylinder (2) with ink, lacquer, adhesive or the like, comprises an elongate frame (8) which is arranged parallel to and outside the cylinder (2) and on which are mounted two parallel, elongate and spaced-apart doctor blades (9,10) to be resiliently and scrapingly applied against the cylinder (2) in operative position. An elongate chamber (11) holding ink (12) or the like is defined by the doctor blades (9,10), the surface of the frame (8) facing the cylinder (2), and the circumferential surface of the cylinder (2). To achieve good flexural and torsional rigidity, the frame (8) comprises at least two elongate interconnected metal sections (13,14) which are made of bent thin sheet-metal, preferably of stainless steel, and by means of which the elongate portion of the frame (8) located between the mounting places for the doctor blades (9,10) forms an elongate stiffening or reinforcing portion.

Abstract: An apparatus for supplying a varnishing cylinder of a sheet varnishing machine with a varnish film includes a varnish feed roller for depositing the varnish film on the varnishing cylinder, a pressure roller cooperating with the varnish feed roller for supplying the varnish film, a varnish basin formed between the varnish feed roller and the pressure roller, scraper blades engaging the varnish feed roller and the pressure roller, respectively, and submerged in the varnish basin, and a common device for holding the scrapper blades.

Abstract: An ink fountain unit for a printing press having a rotatable cylindrical transfer roll, an ink fountain adjacent the roll and parallel thereto, the fountain being equipped with doctor and containment blades and end seals between the blades, all of the blades and end seals having edges bearing against the roll to define a closed chamber for ink, each of the end seals having relatively elongated, spaced apart first and second angled bearing surfaces confronting the doctor and containment blades and an arcuate bearing surface confronting the roll between the angled surfaces and a recess in a chamber wall of each end seal generally aligned with the arcuate bearing surface top provide a cantilevered edge on the arcuate surface so as to apply in operation less lineal pressure to the roll than to the blades.

Abstract: A device for inking a cylinder having depressions therein including a chamber doctor body to which a holder is pivotally connected, the holder being connected to a doctor blade. A force is applied to the holder causing the holder to pivot and force the doctor blade to contact the cylinder. The force may be adjustable aiding in compensating for wear of the doctor blade.

Abstract: A chamber doctor blade assembly includes axially spaced lateral cheeks that seal the ends of the ink reservoir. Each of these lateral cheeks has a sealing face that conforms to the curvature of the screen roller with which the chamber doctor blade is used. These sealing faces are provided with lubricant reservoirs. The lateral faces also have leading edges bent or flared out to form strippers which remove excess beads of ink from the screen roller.

Abstract: The disclosure describes an apparatus for treating fountain solution which comprises a recirculation assembly and a microporous filter assembly. The recirculation assembly is connected between the outlet and inlet of a fountain solution tray of a printing system. The recirculation assembly includes a fountain solution sump and a return line which extends from the outlet of the fountain solution tray to the sump. The microporous filter assembly is positioned in the sump or in the return line and includes a filter position across a fountain solution flow path. A pressure sensitive device is cooperatively arranged with the filter to bypass the filter in response to a predetermined pressure differential.

Abstract: A chamber doctor blade arrangement for a short inking unit utilizes an ink trough that supports a rotatable cylinder which supplies ink from the ink trough to a screen roller. One or more driven disks are situated in the ink trough beneath the rotatable cylinder. These disks aid in the mixing and distribution of the printing ink in the ink trough.

Abstract: In order to achieve good lateral sealing in a simple construction of a chamber doctor, side parts are drawn toward the end sides of the work blade by magnets and/or the side parts are resiliently deformable and contact the work blade with pretensioning.

Abstract: A doctor blade for a printing press includes a thin unbroken doctoring plate having a rear portion secured to a chamber housing of a printing press and a front portion with a doctoring edge which contacts an outer surface of an ink roll to meter ink thereto; and a thin sealing layer secured across one surface of the thin doctoring plate at a rear portion thereof and spaced away from the doctoring edge so as to be out of contact with the outer surface of the ink roll when the doctor blade is secured in the printing press, the sealing layer being made from a closed cell foam and having a thickness in the range from 0.005 to 0.125 inch, the thin sealing layer being sandwiched between the thin doctoring plate and the chamber housing to prevent migration of ink therebetween.

Abstract: A process and a device for the filling of depressions on the cylindrical surface of a rotating, cylindrical body, wherein the device includes a chamber with an interior space having all approximately circular cross-section. Fluid is supplied and discharged centric to the cross-section so that a rotating fluid roller forms when the chamber is positioned on the rotating cylindrical body.

Abstract: Method and apparatus for metering liquid media of different viscosity and preferably for metering liquid media for application to a printing carrier in varnishing units. In order to assure precise metering, exchangeable metering systems are assigned to a forme cylinder. If processing of low-viscosity media is required, a metering roller and an applicator roller of identical external diameter but different surface hardness are used. For the processing of higher-viscosity media, a chamber-type doctor with a screened applicator roller is used.

Abstract: In a printing press having a chamber body, a doctor blade clamping assembly includes a leaf spring having a plurality of leaves assembled together in overlying relation to each other, the leaves being of different lengths; bolts extending through the leaf spring and secured to the chamber body, the bolts engaging the leaf spring to secure the leaf spring to the chamber body in at least partial overlying relation to a doctor blade such that the leaf spring applies a biasing force to the doctor blade to clamp the doctor blade to the chamber body; an inflatable bladder positioned in a recessed area in the chamber body and at least indirectly engaging the leaf spring when the bladder is inflated so as to bias the leaf spring in a direction away from the doctor blade to release the doctor blade from the biasing force of the leaf spring; a conduit connected with the bladder; a spacer positioned in the recessed area between the bladder and the leaf spring; a bladder control connected with the conduit, the bladder co

Abstract: An inking and printing system which is usable with fast drying inks uses a housing and a plurality of spray nozzles to apply an ink solvent to the surfaces of printing cylinders after a printing line or contact line. The application of the solvent prevents ink remaining on the printing cylinder, after contact with a paper web being printed, from drying.

Abstract: Device for processing a viscous fluid for finishing printing products in a finishing unit of a rotary printing press, the finishing unit having a plurality of rollers suppliable with the fluid at least at one feeding location thereof, and a plurality of cylinders suppliable with the fluid by the plurality of rollers, includes a device for collecting the fluid from the one feeding location thereof, the plurality of rollers including a metering roller engageable with one of the cylinders for feeding the fluid thereto, another roller of the plurality of rollers being in cooperative engagement with the metering roller and with the collecting device for feeding the fluid to the metering roller.

Abstract: An undershot inking unit and associated method are disclosed. The undershot inking unit includes an ink fountain roller that is controlled independently of the printing speed of the printing machine, and in which the rotational contact angle of the distributor roller on the ink fountain roller is varied according to the printing unit speed. The method comprises controlling the rotational speed of the ink fountain roller independently of the printing speed of the printing machine; and varying the rotational contact angle of the intermittent ductor roller on the ink fountain roller according to the printing speed of the printing machine. In a preferred embodiment, the apparatus includes two coaxial cams rotatably adjustable with respect to each other. Each cam includes a predominant circumferential contour and a subordinate circumferential contour.

Abstract: In order to provide good sealing for an ink fountain insert installed in a wedge-shaped ink fountain, the base of the insert is lengthened at its lower end by a resilient strip by which the insert can be arranged on the ink blade, and the side walls of the insert support a resilient wedge in the deflecting area of the strip.

Abstract: Excess ink is emptied from an ink duct of a rotary printing machine and is deposited in a collecting container which is removably secured to the ink duct adjacent an upper end of an inclined bottom of the ink duct. A hand manipulable doctor blade is usable to transfer the ink out of the ink duct and into the excess ink collecting container.

Abstract: An inking apparatus is provided for applying ink to a rotating roller of a printing press. The apparatus includes an ink fountain located adjacent the roller for applying ink to the roller, a doctor blade holder, and a doctor blade coupled to the doctor blade holder for engaging the roller with a predetermined pressure to scrape excess ink from the roller as the roller rotates relative to the doctor blade. The apparatus also includes first and second guide rails configured to define a slot therebetween for receiving the doctor blade holder therein, and a mechanism for retaining the doctor blade holder in the slot to hold the doctor blade against the roller during rotation of the roller.

Abstract: A rotogravure inking system utilizes an inking roller mounted in an ink trough and engageable with a printing cylinder. The inking roller exerts a pressure force on the printing cylinder through the use of torsion bars which are located wholly within the ink trough. A prestress can be applied to the torsion bars to impart the desired pressure force to the printing cylinder from the inking roller.

Abstract: A fountain assembly for applying a fluid composition uniformly to the circumferential surface of a rotating transfer roller. The assembly has an elongated plastic frame having a concave channel formed on one side of it and a rigid metal brace on the other side. A pair of doctor blades is attached to opposite sides of said channel and positioned to contact the surface of the transfer roller. A pair of curved radial surface seals form a resilient bulkhead with the ends of said doctor blades to form a seal with the roller. The radial surface seals, doctor blades and concave channel form a closed chamber when positioned against the transfer roller. A pivot supports the fountain assembly, alternately swiveling said fountain assembly toward and away from the transfer roller. Means are provided for supplying a fluid composition into the channel.

Abstract: Stiff ink in a ink fountain of a high-speed printing press or the like is maintained at the viscosity necessary to wet a printing roller by vibrating a rod placed in the ink in the fountain. The rod is mounted on arms pinned to trunnions, one of which trunnions is fixed to an air turbine oscillator. The oscillator when activated, transmits vibrations to a trunnion to which it is fixed. The vibrations pass on to the associated arm and on to the rod to agitate the ink. The trunnions are mounted on vibration isolators on the cheeks of the ink fountain. The rod being mounted via the arms on the trunnions, is swingable in and out of the fountain for cleaning purposes as on ink changes.

Abstract: A metering pump for use on a printing press has a pumping chamber formed between a rigid support plate and a flexible diaphragm. A piston acts through the diaphragm to vary the volume of the chamber and flow to and from the chamber is controlled by respective valves. The valves are formed by co-operation between the diaphragm and support plate and are operated by pistons acting through the diaphragm.

Abstract: A chamber-type doctor blade apparatus for exchanging or replacing a doctor blade in a running printing press is disclosed. The apparatus includes a housing defining an elongated opening for slidably receiving a receiver carrying a doctor blade. When inserted in the elongated opening, the receiver pivots a sealing doctor blade against its normal bias and out of engagement with an applicator roller of the printing press. When the receiver is removed from the elongated opening the sealing doctor blade pivots back into engagement with the applicator roller thereby preventing printing fluids from exiting the chamber-type doctor blade apparatus through the elongated opening when the receiver is removed. As a result, the doctor blades of the chamber-type doctor blade apparatus can be replaced while the serviced printing machine is running.

Abstract: A method and apparatus for placement of a doctor blade bar against an ink dispensing roller utilizes doctor blade supporting base bodies which have resiliently supported doctor blades and which are shiftable between rest and work positions along doctor blade base support beams by blade base shifting devices. The doctor blades are moved into engagement with the screen roller along a curved path. The resilient support of the doctor blades eliminates blade warping and possible damage to the working edge of the blades.

Abstract: An offset printing apparatus provides good adhesion of ink onto the roller of the feeding route by efficiently fractionizing the dampening fluid supplied to the ink device. An ink device has an ink feeding route including an ink metering roller and an ink storage device whose distance toward the revolving direction of the upstream roller of said ink feeding route gradually decreases.

Abstract: A sector blade bar assembly supports spaced doctor blades on slidable base bodies which can be moved to throw-on or adjust the doctor blades with respect to a screened ink roller. A pair of blade base shifting devices are secured to doctor blade base support beams. The shifting devices utilize fluid actuated pistons to move the base bodies along guide surfaces on the beams. The doctor blades are moved in a linear manner to engage the screened ink roller at a negative contact angle. End plates on the base bodies are slidably supported and are spring biased into contact with the screened ink roller when the doctor blades are thrown onto the screened ink roller.

Abstract: A doctor blade bar assembly supports spaced doctor blades which are resiliently carried by slidable base bodies that can be moved to throw-on or adjust the doctor blades with respect to a screened ink roller. A pair of blade base shifting devices are secured to doctor blade base support beams. The shifting devices utilize rotatable eccentric cams to move the base bodies along guide surfaces on the beams. The doctor blades are moved in a linear manner to resiliently engage the screened ink roller at a negative contact angle. End plates on the base bodies cooperate with the spaced, resiliently supported doctor blades to form an ink receiving chamber.

Abstract: To permit easy removal of a printing machine inker fountain box, without leakage of ink from the box, the box is formed with a box body (1) and side walls (3) which have curved front faces (12) fitting against an inker roller (9). To remove the box, for example by lifting off with handles (2) from a printing machine, a curved cover (4) is inserted into guide slots (5) formed in the side walls, which are located just inside of the end surfaces (12) of the end walls. The cover, preferably, has a stripper element (6) at the end, so that, as it is inserted into the curved slots (5), ink on the inker roller (9) is stripped downwardly leaving, at the end, only a small accumulation of ink (19) which can easily be wiped off. The bottom of the inker cover (4) fits against the inker body (1) to prevent leakage of ink from the now removable inker box (1).

Abstract: A two chamber ink container for a short inking unit of an offset rotary printing unit is generally funnel shaped and has an ink reservoir chamber and a feedback chamber. A separating plate divides the ink container into its two chambers. A lower portion of the separating plate defines a flow passage for the ink and doctored-off ink and water back to an ink pump and thence to a chambered doctor blade.

Abstract: An ink fountain apparatus for a printing press includes an ink fountain roller, an ink fountain, follow-up bearings, and springs. The ink fountain roller supplies a printing ink to a plate cylinder. The ink fountain has an ink blade disposed to have a predetermined gap with the circumferential surface of the ink fountain roller and movable forward and backward to approach to and separate from the circumferential surface of the ink fountain roller. The follow-up bearings are fixed to the ink fountain and contact the circumferential surface of the ink fountain roller to follow up a shape of the circumferential surface of the ink fountain roller. The springs bias the ink fountain toward the circumferential surface of the ink fountain roller.

Abstract: An ink fountain apparatus in an ink supply system for use with a printing press. The apparatus comprises an ink reservoir provided with an ink fountain, an ink steering/collecting section formed in a zone of the ink reservoir and in which a screw adapted to stir, transfer and collect ink is rotatively mounted therein, an ink delivery section for delivering ink into the ink reservoir, and a pump installed between the ink steering/collecting section and the ink delivery section. A suction port of the pump is directly connected to an ink collecting zone of the ink steering/collecting section where ink is collected through the action of the screw.

Abstract: A polyurethane foam is used in combination with an ink tray having a housing having a first and second chamber. The first chamber has an overflow baffle extending laterally within said chamber to divide the first chamber into an inlet side and an outlet side. An inlet port is provided for receiving replenishing ink in the inlet side of the chamber and an outlet port is provided for removal of excess ink from said ink tray. A plurality of portals extending between the first and second chambers for directing replenishing ink to the second chamber from the inlet side of the first chamber and excess replenishing ink from the second chamber to the outlet side of the first chamber. An elongated inking roller is mounted to the housing. The absorption material is mounted in the second chamber to contact the replenishing ink. The absorption material has a portion extending from the second chamber and contacting the inking roller to allow the transfer of replenishing ink to the inking roller.

Abstract: A printing apparatus is disclosed which includes an ink reservoir, an anilox roller partially submerged in the ink reservoir, and a baffle having an array of flow restrictors submerged in the ink in the reservoir. The baffle dissipates flow energy in the ink reservoir generated by rotation of the anilox roller. In one embodiment the flow restrictors comprise parallel pegs. In a second embodiment the flow restrictors comprise parallel bristle tufts.