Abstract: A screen printing apparatus includes a screen frame disposed above a ceramic green-sheet, and a screen on which an electrode pattern is formed is held by the screen frame. A cover is detachably attached to the screen frame by making a recess formed on upper surface of the screen frame engage with a projection formed on a lower end surface of the cover. An interior of the cover becomes an airtight state substantially except for a stitch portion of the screen. Therefore, when a vapor pressure of a volatile solvent of an electrode paste becomes to be saturated in the interior of the cover after volatilization of the volatile solvent to some extent, the volatile solvent of the electrode paste is prevented from further volatilizing.

Abstract: An apparatus serves for the metered coating of an inking roller (1) with a fluid coating medium, in particular an inking roller in a printing press which directly or indirectly inks a printing form, whereby the inking roller (1) is in contact with a soft transfer roller (2) or soft printing roller arranged in parallel, and whereby the surfaces of the inking roller (1) and the transfer roller (2) or the printing roller respectively at least have a path speed which is more or less identical. The surface of the inking roller (1) dips directly into the coating medium (3), whereby the thickness of the film of coating medium (3) remaining on the surface of the inking roller (1) is determined by a wiping roller (4) which is arranged parallel to the inking roller (1), is supported on this, has an engraving and, in comparison to the inking roller, a small outside diameter.

Abstract: A coater assembly includes a feed pump and a return pump for circulating a liquid coating material through a doctor reservoir for applying protective or decorative coating material to freshly printed sheets in an offset rotary printing press. A portable console control unit includes circulation and wash-up components for operating the coater in a PURGE/replenishment mode, a COAT mode, a WASH mode and a DRAIN mode. The components for pumping and valving the coating liquid and cleaning liquid are integrated within the portable console unit, which may be remotely located with respect to the press. Cleaning liquid and waste materials are stored internally within the portable console unit. The various operating modes are coordinated by two position, three-port flow control valves which are actuated from one position to the other by electrical solenoids under the control of ON-OFF switches.

Abstract: Method and apparatus for the varnishing and printing of sheets in a printing machine. A feed drum incorporates a counterpressure surface to form a first nip with an impression cylinder. As sheets are fed to the impression cylinder and transported through the first nip, a constant pressure at the first nip consistently transfers ink to a verso side of each sheet. Arranged thereafter, a varnishing cylinder supplied with a quantity of varnish contacts the impression cylinder creating a second nip. As the sheet passes through the second nip, the recto side of the sheet is coated with the varnish. The impression cylinder thus receives a constant pressure for transferring ink to the sheet independent of the pressure provided by the varnishing cylinder. Accordingly, even a partial or intermittent varnishing of the recto sheet side has no adverse effect on print quality, and the sheet does not have to be transferred from the impression cylinder to a separate varnishing unit.

Abstract: The invention refers to an apparatus for applying liquid media onto a web with an applicator roller carried in a machine frame and an impression roller which can be lifted thereoff and adjusted thereto, said impression roller forming a roller gap with the applicator roller, through which the web passes. For the solution of the problem to provide an apparatus with a simple and robust design, in which a desired gap between the impression roller and the applicator roller can be easily set, the impression roller is mounted between the one arms of two parallel two-armed levers being pivotably supported in the machine frame. At the ends of the other arms one end of a pressure piston cylinder unit pivoting the two-armed levers is coupled, the other end of which is mounted in the machine frame. Furthermore, at least one stopper is provided which is allocated to one of the lever arms, arranged in the machine frame, adjustable as to height, and by which the width of the roller gap is limited.

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 liquid coating apparatus capable of applying a liquid coating fluid to a workpiece traveling over a press cylinder rotatably mounted in a printing press is provided. The coating apparatus includes an applicator means which communicates with the press cylinder to form a nip site when the coating apparatus is in a operative position. The applicator means transfers the liquid coating fluid from the coating apparatus to a workpiece that has been caused to travel through the nip site. The applicator means includes an endless coating plate belt driveably mounted upon two support rollers, thereby affording communication of the endless coating plate belt with a press cylinder which has limited access to its surface.

Abstract: A device for varnishing printed sheets in a printing machine. The varnishing device includes a varnish pan, a varnish dipping roller and a metering roller for transferring varnish onto a varnishing cylinder. The dipping roller and the metering roller have a drive that can be connected to the printing machine drive mechanism by an overrunning clutch. The printing machine also includes an auxiliary motor by which the dipping roller and the metering roller can be driven when the printing machine is at a standstill. A torque transmission device, for driving the dipping roller and the metering roller, is also provided. The torque transmission device is connected between the auxiliary motor and the dipping and metering rollers. The torque transmission device does not include a rigid rotary connection apparatus for driving the dipping roller and the metering roller.

Abstract: An ink tray includes a housing having a first, second and third 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 extends into the first chamber 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 rotatively mounted in the third chamber. The third chamber is configured to expose a longitudinal portion of said inking roller. Absorption material is mounted in the second chamber to contact the replenishing ink.

Abstract: An addition to a multi-color lithographic offset printing press comprising a self-contained coating unit moveable into and out of operative relationship with an impression cylinder on the press unit (e.g. the impression cylinder of the last press unit) without interrupting or disrupting printing taking place in this last stage. The coating unit includes a special blanket cylinder, a transfer cylinder and doctor or metering means to control the amount of coating material on the transfer cylinder. Inclined tracks are provided to guide the coating unit into and out of operative relationship with the impression cylinder of the last printing stage.

Abstract: A coating apparatus for use in a sheet-fed, offset rotary printing press to selectively apply a protective and/or decorative coating to the wet ink surface of freshly printed sheets and including a coating unit having a pick-up roller for supplying aqueous coating material from a reservoir to the surface of a delivery cylinder mounted on a press delivery drive shaft, the delivery cylinder performing the dual function of a coating applicator roller and a delivery cylinder during coating operations.

Abstract: A flow restrictor (12) for a fluid comprising, an elongated conduit (26) having a lumen (28), and a restriction member (32) snugly received in the lumen (28) of the conduit (26), and having a pair of opposed ends (38) and (40), an entry port (33) adjacent one end (38) of the restriction member (32), and an exit port (35) adjacent the other end (40) of the restriction member (32), and a device (42a-j) and (46a-i) defining a tortuous path (48) between the entry port (33) and exit port (35) to restrict passage of fluid therethrough.

Abstract: A self contained recirculating powdering and vacuuming assembly and the airflow discharge manifold therfor. The vacuum assembly includes a blower operably connected within a housing having a low and high pressure region. A powder tray is mounted beneath a first outlet at the bottom of the low pressure region and is structured to hold a quantity of powder for controlled depositing onto paper stock having a wet ink coating on preselected areas of the paper stock. This first outlet sealably transfers powder collected in the low pressure region back into the powder tray, which powder is transported by conveyor beneath the powder tray. A vacuum passage extends downward from a low pressure region inlet to a powder pickup slot positioned adjacent to the area where the powder is deposited onto the paper stock. Pressurized air is directed toward the pickup slot from either side thereof by the airflow discharge manifold which receives air from the high pressure region outlet.

Abstract: A method of highly accurate printing using a web offset press, particularly suited for stereographic printing. Consistent reproductions of a composite image are produced on a paper web, and registry between the image and an embossed screen is maintained, by preshrinking (e.g., reducing the moisture content of) the paper prior to printing the composite image on the paper web. Preshrinking the paper prevents the subsequent ink drying operation from causing shrinkage of the paper and concomitant variations in the image, permitting inline formation of a screen in accurate registry with the image.

Abstract: Coating apparatus for applying continuous or spot coatings to an image printed surface includes a plate cylinder; a blanket cylinder for transferring a coating material from the plate cylinder to the copies; a blanket coating roller for transferring a continuous layer of coating material to the blanket cylinder; a plate coating roller for selectively applying spot coating material to the plate cylinder; a first retractor for moving the blanket coating roller laterally into and out of transferring engagement with the blanket cylinder; and a second retractor for moving the plate coating roller into and out of transferring engagement with the plate cylinder.

Abstract: A glue cell apparatus for applying glue in a web printing unit is disclosed, which apparatus includes one or more self-contained modular units that have a finite width in the direction of the width of the web to which glue is applied. The modular units are carried and mounted upon a rail structure that extends substantially across the full width of the web and a drive shaft is also provided which also extends substantially the same distance. Each of the glue cells preferably has a transfer cylinder that is driven by the drive shaft that is operably connected and driven by the gluing and/or coating machine, and a metering roller subassembly having a metering roller which calibrates the thickness of the layer of glue that is ultimately applied to the web. The metering roller has an internal hydraulic motor which drives the same. In an alternate embodiment, a pan roller subassembly is also provided.

Abstract: A technique and apparatus for printing that includes the formation of a hologram, or other type of diffraction pattern, directly on a desired end product of paper, or other sheet material. The hologram, or other diffraction pattern, is formed by casting a surface relief pattern directly onto the sheet material in a limited area.

Abstract: In a sheet rotary printing press having printing units followed by a delivery, a lacquering device located downstream of the printing units and upstream of the delivery and including a lacquer application cylinder for transferring lacquer onto a printed sheet lying on an impression cylinder, a metering roller operatively associated with the lacquer application cylinder, and a dipping roller operatively associated with the metering roller and immersed in a supply of lacquer received in a tank, the metering roller transferring a defined layer of lacquer to the lacquer applicator cylinder and having a diameter comparable to the diameter of the lacquer applicator cylinder in accordance with a ratio of 0.6:1 to 1:1.

Abstract: An apparatus for glazing an article of earthenware or porcelain such as e.g. a plate or the like includes a capstan with a plurality of arms each supporting a workpiece holder for at least one glaze vessel which is rotatable about its axis and tiltable relative to the supporting arm. Before being fed to a glazing station, the article is accurately aligned and imprinted with a mark. A suction unit transfers the article from the centering station to the glaze vessel which is rotated and tilted so as to dip the article in a glaze mass. After surface drying the glaze on the article by initially holding it vertically and then horizontally, the article is transported to a transfer station for placement on a spongy belt which removes excess amount of glaze from the bottom area of the article. The glaze vessel, after being cleared by removing the plate, is refilled with fresh glaze mass in a charging station which is arranged prior to the glazing station.

Abstract: A thermography machine for relief printing equipped with a microwave device comprising: a generator FIG. 2 13 whose transmission frequency may be 2.45 GHz feeding an applicator 14 scattering the microwave energy over the powder image to be melted, a movable short-circuit 15 adjusting the length of the applicator 14 to make it resonate at the frequency of the microwave generator (for example 2.45 GHz), a nonreturn device arranged between the generator 13 and the applicator 14 and an electronic device for automatic tuning of the applicator 14.

Abstract: A convertible coating apparatus provides one or two side coating of a web having wet ink thereon to permit both printing and coating to be carried out prior to any drying operation. The apparatus includes a coating applicator roller in contact with a relatively hard back-up roller. The coating applicator roller is supplied with coating in both the one and two side operations while the back-up roller is supplied with coating only in the two side operation. Water is supplied to the back-up roller in the one side operation and the back-up roller has a hydrophilic surface which, when supplied with water, repels the wet ink on the web passing through the couple and prevents smudging and offset of the ink to the back-up roller. A method of carrying out the one and two side coating is also disclosed. A turning roller is also provided which guides the freshly inked web between inking operations without smudging the ink on the web.

Abstract: An apparatus and method for producing a label which includes the use of an infrared dryer operating at 1200.degree.-1500.degree. F. to cure the adhesive before the underlying ink is re-wetted and runs.

Abstract: A straight line flexographic printing method and machine having a plurality of in-line liquid application stations, at least one of which is an upstream ink image-printing stations for printing ink images on a succession of cardboard copy sheets, and at least one of which is a final downstream liquid-application station which may be a coating application station for printing a protective, and/or aesthetic coating over selected portions of, or over the entire ink image-printed surface of each cardboard copy sheet. The present method and apparatus involves the placement of a forced hot air drying station between each of the liquid application stations to evaporate volatile solvent/diluent from the ink images applied at each inking or coating station before the application of additional ink images or coatings thereover at the next downstream liquid application station.

Abstract: An addition to a multi-color lithographic offset printing press comprising a self-contained coating unit moveable into and out of operative relationship with the last stage impression cylinder without interrupting or disrupting printing taking place in this last stage. The coating unit includes a special blanket cylinder, a transfer roller and doctor or metering means to control the amount of coating material on the transfer roller. Inclined tracks are provided to guide the coating unit into and out of operative relationship with the impression roller of the last printing stage.

Abstract: A varnish scraper is fitted to a varnish applicator roller to scrape off extra varnish which has remained after the varnish has been supplied to a blanket drum. The scraped extra varnish is circulated to a varnish vessel for re-using.

Abstract: A mandrel system for a can coating or decorating machine or the like comprising a ceramic sleeve member for supporting a workpiece and a sleeve support core member for supporting the ceramic sleeve member and at least two axially spaced bearing units supported by the sleeve support core member and/or the support core member.

Abstract: A liquid transfer assembly is shown which transfers a predetermined thickness of liquid to a moving surface, the assembly employing a shearing action to achieve the predetermined thickness. The system includes a supply means for providing a source of the liquid; a first arcuately shaped surface which moves at a first speed and is adapted to contact the supply means so as to obtain a coating of liquid on its surface. A second surface is juxtaposed to the first surface but not in contact therewith, moves at a second speed different from the first speed; and the distance between the two surfaces is sufficiently close that the liquid on the first surface comes in contact with the second surface at their nearest point of proximity. Thus, by virtue of the different surface velocities, the liquid is subjected to a shearing action at the nearest point of proximity with a determined amount thereof being transferred to the second surface.

Abstract: This magnetic ink character recognition (MICR) character coating system makes use of the application of an inexpensive lubricant that is selectively applied to the document, solely in the area where the MICR characters are printed. The lubricant of choice used in this apparatus is sodium stearate (soap). The lubricating apparatus includes a pair of rollers, between which the printed documents are fed. One of the rollers is a drive roller that advances the documents. Opposite of and spring loaded against the drive roller is a free running lubricating roller that is manufactured from a solid lubricant, which lubricating roller is of length equal to the length of the MICR character field that is printed on the document. In the printing of the document, a sensor mark is printed on the document and is used to indicate the beginning of the MICR character field.

Abstract: A printing apparatus which is provided with an integral rotary shaft supported on the main unit's frames, a numbering device, a relief imprinting cylinder, and a coating cylinder which are detachably and alternatively mounted on the rotary shaft from its periphery, and an ink unit and a coater unit, thereby enabling coating operations as need in addition to numbering and imprinting operations.

Abstract: An offset lithographic printing method and machine having a plurality of in-line liquid application stations, at least one of which is an ink image-printing station for printing lithographic ink images on a suitable receptive copy sheet, and at least the final downstream liquid-application station is a coating application station for printing a protective, and/or aesthetic coating over selected portions of, or over the entire ink image-printed surface of the copy sheet. The present method and apparatus involves the placement of a drying station between liquid application stations to evaporate volatile solvent or vehicle from the ink images and/or to solidify the liquid coating applied at upstream stations before the application of a continuous or spot coating thereover at the next downstream coating station.

Abstract: A convertible coating apparatus provides one or two side coating of a web having wet ink thereon to permit both printing and coating to be carried out prior to any drying operation. The apparatus includes a coating applicator roller in contact with a relatively hard back-up roller. The coating applicator roller is supplied with coating in both the one and two side operations while the back-up roller is supplied with coating only in the two side operation. Water is supplied to the back-up roller in the one side operation and the back-up roller has a hydrophilic surface which, when supplied with water, repels the wet ink on the web passing through the couple and prevents smudging and offset of the ink to the back-up roller. A method of carrying out the one and two side coating is also disclosed. A turning roller is also provided which guides the freshly inked web between inking operations without smudging the ink on the web.

Abstract: A retractable coater is used on-line with the last unit of a standard offset lithographic printing press. The coater includes a coating assembly mounted on a platform and a retraction guide assembly, the latter comprising:(i) a horizontal member and means for slidably supporting platform movement along the horizontal member;(ii) a vertical member slidably guiding vertical movement of the platform and(iii) means for slidably lifting the platform and coating metering assembly on a course guided by the vertical member.

Abstract: The invention relates to apparatus for printing labels on labeling machines. To carry out the printing procedure, a longitudinally translating ink coated ribbon runs through ink in a container and is advanced by a rotating inking roller. The inking ribbon contacts the outer circumference of the inking roller. In order to achieve interruption-free and low maintenance but uniformly good application of ink onto the stamping or printing head, the invention provides that the inking ribbon, at the point of contact between the ink ribbon and the ink roller, has its longitudinal extension arranged substantially transversely of the rotational direction of the inking roller.

Abstract: A varnishing apparatus for a printed sheet includes: a metering roller, to a peripheral surface of which a varnish from a varnish duct is transferred; a form roller which is brought into contact with a downstream side of the metering roller and is rotated in the same direction as that of the metering roller to allow transfer of the varnish from the metering roller; and a rubber blanket cylinder which is brought into contact with a downstream side of the form roller and is rotated in a direction opposite to that of the form roller to allow transfer of the varnish from the form roller, the rubber blanket cylinder having a notch on its outer peripheral portion and transferring the varnish onto a sheet which is in contact with its peripheral surface. The surface of the metering roller is formed of an elastic material having a roughened surface.

Abstract: A thermographic printing machine has a powder applicator, a heating stage, and a cooling stage wherein the heating stage has a paper transport path which is sinuous and passes on both sides of a heater, the paper passing around rollers which define the ends of the transport path. The rollers at one end do not touch the printed surface of the paper and a guide shell prevents buckling. The machine can run much faster than any previous thermographic machine because of the compactness of the heater stage. The machine may have a re-folding device for continuous fan-folded paper, wherein the paper is drawn through the machine by a drive mechanism at the exit end of the machine prior to the re-folding stage, and wherein an adjustable linkage between the drive mechanism and the re-folding device ensures re-folding of fan-fold paper of different sheet lengths.

Abstract: An offset lithographic printing machine having a plurality of in-line liquid application stations, at least one of which is an ink image printing station for printing lithographic ink images onto suitable receptive copy sheets, and the final downstream liquid-application station being a coating application station for printing a protective, and/or aesthetic coating over selected portions of, or over the entire ink image-printed surface of the copy sheets.

Abstract: A method and apparatus for preventing smudging of indicia printed on a surface by selective application of an amount of coating material to lubricate the contact with surfaces abrading the printed indicia or to provide physical separation from abrading surfaces, and thus prevent smearing. The coating material is preferably a "Teflon" micropowder that is applied by using impulse devices to dispense controlled amounts of the micropowder from a container, with the dispensed micropowder being transferred to, and passing through a plurality of apertures adjacent the surface of a piece of paper on which indicia has just been printed by a nonimpact printer such as a laser printer.

Abstract: A coater for an offset printing press in which the last printing station, i.e., the blanket cylinder roller with its associated sheet-handling grippers, is converted to coating service, such that a pick-up roller, after an ascending arcuate path not exceeding 80.degree., transfers a liquid coating to an applicator roller rotating in an opposing direction to the blanket cylinder surface which coats the individual imprinted sheets and the liquid coating itself serves as a lubricant permitting said opposing directions of rotation and grippers of said blanket cylinder roller maintain proper handling control of the sheets during the coating thereof. Limiting the arcuate path of 80.degree. obviates reverse flow of the liquid coating on the pick-up roller.

Abstract: An apparatus and method for oscillating the ink form rollers and dampening form roller in a lithographic printing press to apply a smooth, relatively uniform coating of ink to the ink-receptive areas of a lithographic printing plate and to prevent ink from being transferred from the dampening form roller to the ink-rejecting areas of the printing plate. The ink form rollers and the dampening form roller are each comprised of a hollow cylindrical metal core surrounded by a rubber covering. First and second bronze bushings are partially inserted into the hollow core at respective opposite ends of the roller. Each roller is mounted on a shaft rotatable about its own axis. The shaft has first and second shaft keys for mating with complementary first and second keyways formed in the respective first and second bushings to allow the bushings to engage the shaft for common rotation while allowing the roller and bushings to slide axially with respect to the shaft.

Abstract: A highly compact machine for applying an attractive protective coating to a paper web that passes through a printing press is located between the last press stand and the dryer of the printing press, and to enable the machine to receive the web, the printing press is provided with an apparatus for directing the web back to the print stands and the machine after the web passes through the dryer. The machine includes upper and lower blanket cylinders, a plate cylinder contacting the lower blanket cylinder, and an oscillating cylinder below the plate cylinder. In addition the coating machine includes a pan containing a coating fluid and a pan roller, the surface of which rotates through the fluid in the pan to lift it out of the pan. A metering roller revolves close to the pan roller to remove excess fluid from the pan roller which thereupon transfers the fluid to a form roller. That form roller runs against the oscillating cylinder and transfers the fluid to the oscillating cylinder.

Abstract: In a printing machine, a medium applicator disposed downstream of printing units of the machine, in travel direction of a sheet which has been printed, the applicator having three rollers including a first roller for taking up medium from a supply container, a second roller for metering a quantity of the medium to be applied, and a third roller having the same diameter as that of cylinders of the printing units for transferring the medium, includes a rubber lining disposed on the third roller for directly applying the medium onto the printed sheet; the three rollers, during application of the medium, being in constant meshing engagement with a sheet-transferring cylinder; a device for uncoupling the three rollers from the sheet-transferring cylinder, and a separate motor for driving the three rollers when the rollers are uncoupled.

Abstract: Apparatus for applying a liquid coating to the surface of a sheet workpiece and adapted for operation on-line with the last unit of a lithographic sheet printing press. The apparatus comprises: (1) a textured metering roller in a mount which is linearly movably attached to a support platform fixed adjacent the press unit, and extending between the last press unit and a remote point. The support platform allows movement of the metering roller and the mount between a first position in which the mount is continuously adjustably biased against the last press unit, and a second position, away from the last press unit to allow use of the last press unit as a lithographic press. The platform comprising longitudinal supports arranged generally perpendicular to a vertical plane through the axis of said metering roller, and the metering roller mount is movably supported and guided along the supports.

Abstract: In accordance with the invention a varnishing unit in a printing machine is provided which simultaneously varnishes and perfects printing sheets. The varnishing unit comprises a rotating impression cylinder in contact with a rotating varnishing cylinder to create a nip between the two cylinders through which sheets are individually drawn. In order to perfect each sheet at the nip, the impression cylinder has at least one plate or a blanket secured to its surface. Depending on whether a plate or a blanket is secured to the impression cylinder, an appropriate dampening and inking means is provided. Similarly, the varnishing cylinder is supplied a controlled quantity of varnish by a varnishing means.

Abstract: Apparatus for forming matchbox skillets from pre-printed sheets, each sheet having a plurality of rows of matchbox blanks printed thereon. The apparatus includes a sheet feeder for storing pre-printed sheets and removing the sheets one-by-one. The sheets are fed to a gravure printing machine, which applies stripes of striking compound material to predetermined areas of the sheets as they pass therethrough. A conveyor is provided for conveying the sheets from the sheet feeder to the gravure printing machine. After leaving the gravure printing machine the stripes of striking compound material are dried in a radio frequency drier. The sheets are then cut into matchbox blanks by cutting machines. The gravure printing machine has an upper engraving roller, a lower pressure roller, and means for feeding the sheets between the two rollers so that the stripes are printed on the upper surface of the sheets in register with the matchbox blanks.

Abstract: In a printing machine, a medium applicator disposed downstream of printing units of the machine, in travel direction through the machine of a sheet being printed, the medium applicator having an assembly formed of a first roller for taking up medium from a supply container, a second roller for metering a quantity of the medium to be applied, and a third roller for transferring the medium, the third roller having a continuous cylindrical surface with a rubber lining disposed thereon for directly applying the medium onto the sheet, the three rollers being in constant meshing engagement with a sheet-transfer cylinder during application of the medium, the medium applicator further comprising a plate cylinder having a cylindrical surface interrupted by a transverse channel and carrying a flexible relief plate having raised surfaces thereon, and another assembly of rollers for supplying medium from another supply container to the raised surfaces of the flexible relief plate, the plate cylinder being in operative en

Abstract: A paper coloring apparatus particularly for rotation printing presses and, ordinarily for the coloring of white paper to the desired color before the paper web (2) is drawn into the printing press. The paper web (2) passes over several guide rollers (3, 4, 5) plus a displaceable roller (8) which can be displaced towards and away from a coloring roller (10). The coloring roller (10) is supplied with dye from a dye bath (12) via a dye roller (13) which communicates with dye bath (12), and a displaceable intermediate roller (14) which can be displaced towards and away from engagement with the dye roller (13) and coloring roller (10). The displaceable rollers (8, 14) are displaced with the aid of compressed air cylinders (11, 15), and the pressure of the displaceable rollers (8, 14) against the counter-rotating rollers (10, 13) is regulated with the aid of regulation valves in the appropriate compressed air circuits.

Abstract: Disclosed is an overvarnish unit for applying varnish to a web of printed material as a protective overlay. The overvarnish unit includes a varnish fountain for receiving paste varnish, a form roller, and a plurality of rollers intermediate the fountain and form roller. The form roller engages an impression cylinder roller forming part of a printing assembly. The varnish is transferred from the fountain to the form roller by the intermediate rollers which also mill the varnish as it is being transferred to reduce its viscosity. The form roller is driven at a peripheral speed greater than the linear speed of the web over the impression cylinder roller. This form roller overspeed provides a smearing action in applying the varnish to the web rather than a one to one or line by line printing action thus achieving control over the thickness of the applied varnish and the appearance of the final product.

Abstract: In a varnish coater, a set of a blanket cylinder and a form roller and a set of a pan roller and a metering roller are driven by different drive sources. One-way clutches are arranged between the blanket cylinder and the form roller and between the form roller and a motor as one of the different drive sources, respectively. The form roller is selectively driven by one of the different drive sources through a corresponding one-way clutch. Alternatively, the form roller is driven by one of the drive sources which has a higher rotational speed.

Abstract: A multifluid dispensing system especially suited for web tinting machines or the like. A plurality of fluid and, optionally, air-tight tanks are provided. In a recirculating embodiment, the tanks feed fluid to, and receive fluid from, two manifolds. The upper (output) manifold receiving fluid from each tank slopes to gravity drain into the second manifold. The second (inlet) manifold is level to eliminate low spots for fluid accumulation. The inlet manifold drains into the tanks through valves in the side of, and level with, the manifold. A non-recirculating embodiment uses only the second manifold with pressurized tanks. An optional flush tank may be provided.

Abstract: An ink that fluoresces in the near infrared is used to mark documents such as bank checks for automatic identification. Markings with this ink are reliably detectable, even in the presence of other markings commonly found on such documents. The preferred fluorescent material of our invention is a phenoxazine dye 3,7-BIS(diethylamino) phenoxazonium nitrate.