Abstract: A chamber doctor for inking a cylinder in a printing machine, which cylinder has depressions for receiving ink. The chamber doctor includes a chamber doctor body, at least one doctor blade, and lateral side parts, the chamber doctor body, the at least one doctor blade and the side parts being arranged to define an ink chamber that is open toward the cylinder. The doctor blade is movably supported at the chamber doctor body. The doctor blade is movable relative to the chamber doctor body so that the doctor blade is automatically readjusted to compensate for wear, and further so that parts of the doctor blade and chamber doctor body which come into contact with ink are movable away from one another.

Abstract: To improve the control of the inking process in an offset printing machine, color measuring fields provided on printed sheets are evaluated not as heretofore densitometrically but colorimetrically by means of spectral measurements. Spectral reflections are used to match colors, or color coordinates are calculated from them and compared with corresponding set reflections or set color coordinates. The color deviations obtained in this manner are used to control the inking process. For the stabilization of printing runs the spectral reflections are converted into filter color densities and the inking process is controlled on the basis of these color densities in a conventional manner. The control of the inking process using color deviations and control using color density may be superposed upon each other.The process makes it possible to adapt color impressions in delicate locations of importance for the image in the print to the corresponding locations of the proof.

Abstract: A doctor blade device for an inking rinse unit of a rotary printing machine, including a doctor blade support, provided with an ink channel, on which two parallel doctor blades that are adjustable in relation to a form linking roller are affixed and--together with the form roller, the doctor blade support and packing pieces, which are made out of an elastomeric material and clamped adjacent to the blades and roller by the support--delimiting a closed ink compartment, and including lines for the transport of ink into and out of the ink compartment. In order to be able to replace the packing pieces quickly and easily, they are held in their seats by clamping quick release closure.

Abstract: There is provided a flexographic ink feeding apparatus in which a part of a chamber into which ink is fed is defined by a blade mounting plate and blades, characterized in that a junction of the blade mounting plate and the blade is formed so as to make an obtuse angle.

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: A mixing and dispersing apparatus for emulsion ink in a printing press is disclosed. The apparatus includes a vessel having walls defining an upper chamber and a lower chamber. A motor drives a shaft carrying a propeller having pitched blades, disposed in the upper chamber. The shaft also carries a rotor disposed below the propeller. The rotor includes downwardly extending teeth that are disposed adjacent to inner and outer stator walls. The inner and outer stator walls are perforated by slots therein and are fixed with respect to the vessel. The propeller mixes ink and fountain solution and propels the mixture downward toward the rotor, which shears and disperses the ink and fountain solution into the lower chamber, forming a suitably stable emulsion ink. The emulsion ink is then pumped to an ink distribution rail for use of some of the emulsion ink for printing, with the remainder of the emulsion ink being recirculated to the mixing and dispersing apparatus.

Abstract: An ink chamber doctor blade for a printing machine, comprising a doctor blade box (10) forming an ink chamber, at least two doctor blade knives (11, 12) attached to the doctor blade box (10) and bounding an opening (13) which, during operation, points to the outer circumference of a printing cylinder or an ink transfer roller and extends over the length of the doctor blade box (10), two front end covers (2) detachably fitted to the respective front end of the doctor blade box (10) and sealing the ink chamber, and means for supplying and discharging ink, each front end cover (2) comprising a rigid cover basic body (25) and a sealing element held by it and coming to abut against the doctor blade knives (11, 12) and against the section of the outer circumference of the printing cylinder or the ink transfer roller located between these doctor blade knives, wherein the sealing element is formed by a flat two-layer sealing plate (20), the first layer (21) of which facing the doctor blade box (10) is made of a soft-

Abstract: A method and apparatus are proposed for cleaning the ink chamber (27) of the ink rail (11) of a printing machine ink supply system and from whch ink is delivered to an ink roller through a multiplicity of side-by-side stepped feed holes (29) in the rail (11) , the method and apparatus utilising a plug (41) freely slidable within the chamber (27) and adapted to purge the chamber (27) of ink present in advance of the plug (41) on its movement longitudinally of the chamber. In analogous manner the plug (41) may be used to effect a colour change as between ink sources provided at opposite ends of the rail. (FIG. 2).

Abstract: To remarkably decrease the amount of material for the manufacture of ink containers and the volume of the ink containers after use, so as to contribute to the economy of natural resource consumption and solving the problem of destruction of global environment by the waste of products, without sacrificing the easiness of handling the ink containers for printers, the ink container for directly storing ink is principally constructed by a thin walled vessel contractible according to discharge of the ink therefrom, with a nozzle being connected to an end portion of the vessel, with a disk handle being mounted to the nozzle, so that the disk handle can be grasped by five fingers of a hand for carrying the ink container by hand and for removing a cap therefrom. For the ink container being mounted into a printer, the ink container is mounted into a reinforcing case with the nozzle and the disk handle, so that the ink container is handled like the case.

Abstract: A rotational system to be utilized in conjunction with a vertical screening apparatus, wherein a print head assembly and ink reservoir rotate about a pivot away from the coating chamber in order to allow ready access to the screen chase.

Abstract: Printing of a pattern from a die to a surface is performed by immersing the die in a bath of liquid print material with the die surface facing upward, then either lowering the bath liquid level or raising the die to expose the die surface wet with liquid print material, and contacting the surface to be printed with the wet die surface.

Abstract: The temperature of ink applied to a substrate during printing is controlled by directing air of controlled temperature at the ink by means of an ink temperature controlling device (9). The device comprises a fan (11) and a heater (12) for heating the air propelled at the ink by the fan. The device may include a sensor (22) for monitoring the temperature of the ink in which case the sensor may be operably connected to the fan and/or heater to form a closed loop system.

Abstract: A liquid fountain unit and method for a roll applicator equipped with doctor blades extending parallel to the roll axis and an axially extending third blade mounted adjacent one of the doctor blades and having an angled configuration in the fountain unit chamber with a free edge portion directed toward the roll applicator, the third blade being equipped with a passage to permit liquid flow from one blade side to the other to substantially minimize ghosting.

Abstract: In an ink supply control device for a stencil printing machine which controls the supply of printing ink to an ink reservoir formed in a printing drum according to a signal produced from an ink amount detecting device which produces a first signal when the amount of ink stored in the ink reservoir is detected to be greater than a prescribed level, and a second signal when the amount of ink stored in the ink reservoir is detected to be less than the prescribed level, time durations of the first and second signals over a certain time interval or a certain interval of the rotation of the angle of the printing drum are evaluated as a basis for determining true insufficiency of the level of the printing ink in the ink reservoir through an arithmetic computation to the end of preventing erroneous detection by the ink amount detecting device from adversely affecting the control of the supply of printing ink in the ink reservoir.

Abstract: The doctor portion of the ink cup of a pad printing machine is formed of a polymeric composite which has high compressive strength and high resistance to chemicals, notably to printing inks. The polymeric doctoring portion is tapered and defines a narrow distal end surface which circumscribes the open end of the cup for doctoring engagement with an opposed plastic gravure surface. The doctoring portion may be a separate ring element suitably mounted at the open end of the cup body or it may be a unitary part of the cup. In a preferred embodiment, this doctoring portion is a ring formed of a polymer composite reinforced by carbon fibers and which is permeated by lubricant particles or granules of graphite.

Abstract: A stamping machine including a rubber stamping head angular position adjustment mechanism, which can be adjusted to the desired angular position for stamping different workpieces, a horizontal slide adjustment mechanism, which can be adjusted to move the rubber stamping head to the desired horizontal position, an automatic ink feeder, which can be adjusted to supply metered quantity of ink, a scraper carrier, which keeps the scraper blade and the ink application roller unit operated at the same elevation, an ink tray assembly, which is detachable, and a workpiece conveying mechanism, which uses a driving wheel driven by an air cylinder through a rack and a gear to turn a conveying chain in carrying a series of workpiece table plates for a continuous stamping operation.

Abstract: A holding device for a chamber doctor blade utilizes spaced holders which support the base body of the chamber doctor blade for sliding movement toward or away from a screen roller. This sliding movement is accomplished by spring forces exerted through a spring loaded pressure element and a pressure cam which oppose each other. The pressure cam can be shifted by an adjusting device through a spring biased tappet.

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 liquid level detecting device having an overflow reservoir, a flow restriction means and a level detecting means. The reservoir defines a cavity for collecting an electrically-conductive liquid overflowing from a container. This reservoir, which has a low level position associated therewith, includes inlet means through which the overflowing liquid enters, outlet means through which the collected liquid exits, and vent means through which built-up gases escape.Flow restriction means controls the rate at which the collected liquid exits through the reservoir's outlet means. Flow restriction means is calibrated such that the rate at which liquid exits the reservoir does not exceed the rate at which liquid overflows therein.In one embodiment, level detecting means includes a capacitive sensor switch which is fixedly secured to the reservoir to detect whether the liquid level is below the reservoir's low level position.

Abstract: An ink container 1 has an open bottom surrounded by a closed sidewall 3 whose lower edge 3a bears against the upper surface of a flat printing plate 15. Ink 31 in the container is applied to the plate as the latter is reciprocated horizontally. An apertured baffle disk 10 is disposed within the container just above its open bottom, and prevents the ink from being frictionally drawn to one side by the moving plate. This assures a more uniform inking of the plate, and enables a lower ink level to be tolerated before the container has to be refilled.

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: An inking device effective to provide a faultless ink-tight fit comprises a sheet-like support for a plate, and a cartridge, similar in shape to an overturned glass, which is adapted to contain an ink and has a lip in liquid-tight doctoring engagement with the plate, wherein the cartridge has a ring formed from a zirconia-containing ceramic material and provided with a sharp edge constituting the lip.

Abstract: In an ink supply apparatus, inks of a paste-like consistency are supplied from a cylinder to a chamber doctor blade disposed adjacent an inking roller. Two conduits are disposed at opposite ends of the chamber doctor blade and each conduit communicates with one of the two opposite ends of the cylinder. Ink is supplied to the cylinder through an aperture. Within the cylinder there is disposed a reciprocating piston which, at low speed, forces ink via the conduits to the chamber doctor blade.

Abstract: An ink roller for a rotary printing press has a hollow axle that receives ink from a pressurized ink supply. The axle is provided with a plurality of radial bores that are selectively aligned with similar radial in concentrically arranged inner and intermediate sleeves. A porous outer sleeve is concentric with the intermediate sleeve. The inner sleeve oscillates on the axle while the intermediate sleeve and the outer sleeve both rotate at different speeds to provide the outer sleeve with a positive rotational speed differential.

Abstract: An ink agitating apparatus comprises a generally rectangular curved blade having concave recesses in its side and bottom edges. The blade is adapted to be reciprocated laterally by a pneumatic mechanism. The blade is flexible so that it can be twisted longitudinally by the hydrodynamic forces to which it is subjected when it moves through the ink to improve the agitation characteristic achieved by the blade.

Abstract: In an ink near-end detecting device, a pair of electrodes are arranged in the porous material in the ink tank and in the ink pool provided below the ink tank, respectively, so that the time instant the ink in the porous material has been nearly used up is detected from the variation of the electrical resistance between the electrodes with the consumption of the ink in the porous material.

Abstract: A divider seal for a split-fountain chambered doctor blade for a printing press, comprising a seal contoured to sealingly engage a circumferential surface of a rotating cylinder, a seal retainer for retaining the seal in sealing engagement with the rotating cylinder, and pneumatic biasing structure, such as a pneumatic bladder, acting on the seal retainer for resiliently biasing the seal into sealing engagement with the rotating cylinder.

Abstract: A printing ink feeding assembly for an anilox roller uses a plurality of individual anilox inking units. Each unit has its own individual chambered doctor blade, ink trough, ink pump and drive motor. The widths of the units and their positioning beneath the anilox roller are variable to provide flexibility of anilox roller inking.

Abstract: A portable ink fountain insert for an ink fountain of a printing press includes a body defining a volume for receiving ink, with a discharge gap being defined at the lower front end of the body. A pull is cable guided in a recess in the front wall. A gap control device is connected to the body and to the pull cable for selectively opening and closing the ink discharge gap in response to displacement of the pull cable. An actuating element engages the pull cable for controlling displacement of the pull cable and thus the opening and closing of the discharge gap.

Abstract: An apparatus for evacuating ink from the inking trough of a flexographic printing machine uses an air ejector nozzle in the ink drain line to draw ink from the trough. The apparatus includes an air-operated control system in which air valves control an air-bladder pinch valve in the ink drain line and an oil-bladder pinch valve in the air ejector line. An air pressure regulator maintains a pressure charge on an accumulator associated with the oil-bladder pinch valve, in order to provide a gradual increase of air flow to the ejector nozzle to prevent sudden vacuum surge that might over-flex the doctor blades.

Abstract: An offset blanket print/coat assembly for printing or coating rotating containers has a blanket wheel supporting a plurality of blanket assemblies by means of radial frame plates and an air cylinder operable for retracting the blankets inwardly on the blanket wheel. The blanket assemblies move in both a radial direction and an axial direction in moving from a printing position to a stop-print position in response to the detection of the absence of a container of a mandrel approaching the printing position. Novel inker blade adjustment means adjusts the fountain blade relative to the fountain roll both inwardly and outwardly relative to the fountain roll and holds the blade edge in various desired positions along its entire length by the adjustment of individual adjustment members positioned along the blade length.

Abstract: The present invention has as an object to provide an inking device which prevents the generation of vibration in rollers and is capable of supplying the amount of ink uniformly all the time to the surface of printing plate in the direction of its width. The inking device of the invention is constructed such that the distance between the bottom of the ink pan and the surface of the ink fountain roller, the distance between the surface of the ink fountain roller and the surface of the ink transfer roller and the surface of the roller next to it in the downstream direction are made smaller as the distance proceeds downstream. The ink is transferred from the upstream side to the downstream side, and during this ink transfer, the ink distribution is regulated uniformly in the direction of roller width by means of a doctor blade, etc.

Abstract: An apparatus for monitoring and controlling the level of the ink in the ink fountain of offset printing presses, using an ultrasonic transducer for measuring the distance between the ink and the transducer which includes a microprocessor system for calculating a time duration of an ink feed cycle to fill the ink fountain to a preset ink level and for generating an ink cycle control signal based on time duration data and ink viscosity characteristics. A control valve activated by the ink cycle control signal delivers ink to the ink fountain.

Abstract: A low-inertia, fast-acting servo motor (40) coupled through a gear to a fountain roll (20) of an inker is controlled and energized by an electronic control unit (45). The control unit controls acceleration of the fountain roll (20) during the period of time when a ductor roller (21) is in contact therewith, from speed 0 to the required speed which is necessary to rotate the fountain roll (20) about a predetermined angle (.phi.s) which, for example, is between 0.degree. and 90.degree.. During the second half of the ductor roller cycle (T), that is, when the ductor roller (21) is separated from the fountain roll (20) and in engagement with an ink transfer roller (22) of the inker, the angular speed of the fountain roll is braked to zero speed. The system permits remote command of the angle of rotation (.phi.s) of the fountain roll (20) during the half cycle (T/2) of the ductor roller (21) as the ductor roller oscillates at a speed depending on printing press machine speed.

Abstract: In an ink groove to have its one face defined by the circumference of an ink fountain roller and its other face defined by an oblique assembly, to have a V-shaped section, there is disclosed a device for controlling the width of an ink groove remotely, which comprises: drive means for turning the oblique assembly, between a position for forming the ink groove, when actuated, and another position for forming none of the ink groove; and drive pressure supply means for actuating the drive means remotely.

Abstract: A system for metering the volume of a liquid, e.g. ink, supplied by a positive displacement pump to an installation, such as a printing press, employs a device for generating a first series of signals each indicative of completion of a pumping stroke. The speed of the pump is also sensed to generate a second series of signals each indicative of the positive supply of liquid by the pump. The signals of the first series are counted only in the presence of a corresponding signal of the second series. The result is an accurate numerical indication of the total volume of liquid pumped.

Abstract: An ink tray has been improved to include a plurality of channel ribs formed on the bottom surface. The rib ends are spaced apart from the ink tray side walls. An ink pad is supported in the ink tray above the channels such that ink directed through the channels is absorbed by the ink pad. Replenishing ink is directed into the ink tray and caused to collect at one end of a first group of channel ribs and thereafter uniformly between each channel rib of the first group. The displaced ink is then caused to uniformly travel between a second group of channel ribs and exit the ink tray. The travel path of the ink allows for even absorption of ink by the ink pad and the removal of excess ink from the ink tray.

Abstract: To obviate local differences in heat expansion in the ink duct, ink metering means and ductor roller, and to temper the printing ink, stabilize the ink-damping agent emulsion and protect the ductor roller from corrosion, the ink duct includes a heat insulating material secured to underside of the duct body and a mid-section portion of the duct body side facing the ductor roller is supplied with a warm air flow from the printing press, boosted by a plurality of fans.

Abstract: A printing ink fountain having a disposable liner made of paperboard or the like for use with flexographic printing presses. The liner, which is supported in a liner retainer, is generally upwardly open to receive therein a metering roller of the printing press. The liner includes a flexible drain hose attached to the bottom thereof for draining ink from the liner.

Abstract: A device for applying color to a block of a tampon printing machine includes a coloring and wiping device which is constructed as a bottomless hollow body and can be moved toward and pressed against the block with a pressing device. The pressing device is at least one magnet arranged in the hollow body. The magnets are arranged in pocket-shaped recesses at the end faces of the square hollow body. It is also possible to provide a stirring mechanism in the hollow body and to arrange the magnets in downwardly open chambers or an annular groove of the stirring mechanism.

Abstract: A rotary machine for printing or otherwise applying ink or other liquidous composition to a rotary receiving roll carried by a frame and having a longitudinal rotational axis and a peripheral surface. One or more doctor blades having a doctoring edge(s) contact the roll peripheral surface. A blade support for the doctor blade includes or is connected to an aligning member having a registration surface which is held in closely confronting or directly contacting relationship with a portion of the peripheral surface and/or with a portion of a projecting member which projects from the roll. The registration surface has a connection with the doctor blade holder for maintaining a substantially fixed radial distance relationship between the holder and the rotational axis of the roll.

Abstract: An inking system of postage and valuation stamping machines has an inking unit with an ink chamber and a portion covering the ink chamber. An inking unit cover has a stepped shape and a drip edge at a step thereof with a wedge-shaped cross section. The inking unit cover has a funnel disposed on the portion of the inking system covering the ink chamber for refilling the ink chamber with stamp ink. A stamp ink container is provided in the form of a cartridge. The funnel guides, retains and empties the cartridge.

Abstract: In an ink supply device having an ink reserve vessel being composed of a bottom member and surrounding side wall members, means for shifting one member of the bottom and surrounding side wall members between a closed position contacting the one member with the other members to form the ink reserve vessel and an open position separating the one member from the other members at the bottom level of the ink reserve vessel are provided for quickly discharging ink therefrom.

Abstract: An apparatus for closing an ink fountain on a printing press, the press having a fountain roll rotatable relative to a supply of ink and a flexible fountain blade adjacent thereto and spaced apart from the roll by a small gap. The size of the gap is controlled by a series of ink keys which move blade sections toward or away from the roll. When the press is to be shut down, the gap is closed by moving the blade against the roll in order to prevent ink leakage from the fountain. To do this, a bladder located adjacent the blade is inflated, forcing the entire length of the blade against the roll and thus closing the gap. The inflatable bladder operates independently of the ink keys, so that the keys need not be closed or adjusted when the press is shut down. When the press is restarted, the bladder deflates, allowing the blade to move away from the roll and to be controllable by the ink keys again.

Abstract: A system for monitoring ink flow from an ink storage tank to at least one ink fountain of a high-speed, web-fed printing press employing a scale for measuring the weight of the ink storage tank and comparing weight signals from the scale at successive times to determine the weight of ink consumed over the interval between readings. A pump is associated with the storage tank for pumping the ink to the fountain via coupling lines. An ink level sensor detects the level of ink in the fountain and provides an ink demand signal for operating a valve means in the ink coupling line to in turn cause ink flow to the fountain so as to provide replenishment of ink thereat. With the use of plural fountains, means are provided for prioritizing delivery to the fountains so that individual ink consumption on a per fountain basis can be determined. In this regard, the system also employs a volume sensor preferably in the form of a pump stroke position sensor for determining incremental weight delivery per stroke.

Abstract: The monitoring of the ink supply in an ink reservoir occurs by measurement and evaluation of the change in resistance between two electrodes situated in the inside of the ink reservoir, the one electrode being formed by the hollow needle which produces a flow connection between the ink reservoir and ink supply system; the second electrode is formed as a needle and is situated in a wall of the reservoir and is arranged in an insulating ring which is formed by walls of the ink reservoir which are drawn up toward the inside.

Abstract: A printing press liquid circulation system of the type wherein the liquid is circulated in a closed path to and from one or several fountain pans of the press by means of a pump. The system is characterized by the provision of an upright filter chamber, the lower section of which is connected to the suction side of the pump, said chamber being provided with a filter medium intermediate its ends, the return conduit of the fountain paths opening in the upper section of the filter chamber above said filter medium. A liquid make-up and proportional mixing system is provided to maintain at a predetermined level the liquid in the lower section of the filter chamber. Air cannot enter the liquid and, therefore, the formation of foam, either in the fountain path or in the pump and filter chamber lower section, is prevented. Preferably, the discharge of the pump is connected to a heat exchanger to maintain the liquid at the required temperature.

Abstract: A squeegee device destined to be used in a movable stencil, comprises a support structure for a squeegee element which, in operation, is held slightly curved under some pressure in contact with the stencil, a closure strip being mounted upstream of the squeegee element and also being in contact with the stencil, so forming an adjustable gap being sealed at both ends, means being provided for the supply of pressurized viscous substance to said gap.

Abstract: An adjustable hand stamp device controls stamp compression of the ink bearing stamp element. The device includes an inverted cup-shaped handle connected to a platen by a shaft. A shroud slidably mounted on the shaft and biased downwardly by a spring positioned between the handle and the platen covers the platen and the indicia-bearing element mounted on the platen. The position of the shroud relative to the platen is controlled by the position of an eccentric cam positioned between a bearing surface on the shroud and a bearing surface on the inside of the handle. The cam is connected to an adjusting knob rotatably mounted on the front face of the handle.

Abstract: A .[.divider.]. seal for a .[.split-fountain.]. .Iadd.fountain .Iaddend.chambered doctor blade for a printing press, comprising a seal contoured to sealingly engage a circumferential surface of a rotating cylinder, a seal retainer for retaining the seal in sealing engagement with the rotating cylinder, and pneumatic biasing structure, such as a pneumatic bladder, acting on the seal retainer for resiliently biasing the seal into sealing engagement with the rotating cylinder.