Abstract: A printing unit of a rotary printing press for using various ink types, particularly water-based inks, is provided. The printing unit includes an inking mechanism, a print cylinder, and a blanket cylinder. The inking mechanism and the cylinders are mounted in side walls of the printing unit. A housing at least partially surrounds the inking mechanism and the cylinders to maintain a surrounding atmosphere within an at least semi-enclosed area of the printing unit. A chemical agent may be selectively added to the atmosphere in the semi-enclosed area to reduce the rate of evaporation of a substance in the ink. The printing unit also includes a cooling unit for maintaining an ink carrying surface of one or more of the print form, the printing blanket, and the inking unit at a predetermined temperature which is suitable for printing with water-based inks. The printing unit may be a sheet-fed printing press.

Abstract: A temperature-control apparatus for a printing machine: a closed, temperature-control fluid circuit including a pump with a suction and pressure side, a fluid feed line feeding temperature-controlled fluid from a fluid source to the suction side of the pump and a fluid return line between the pressure side of the pump and the load. Temperature-control fluid from the source is pumped by the pump through the fluid circuit to the load and is recycled to the suction side of the pump. A valve is connected between the pressure side of the pump and a return line to the source and is controlled by a temperature sensor that senses the temperature in the circuit and selectively directs fluid from the source through the circuit or out of the circuit and back to the source dependent upon the sensed temperature in the circuit. There may be a heater in the circuit.

Abstract: A dryer for a printing press uses an electric heater to heat air that flows into an air plenum. The heated air flows out of the plenum at high velocity through an array of orifices that have a diameter of about 0.040 inch. The high velocity air impinges on ink which is printed on a web by the press.

Abstract: A method and device for controlling the temperature of an ink duct roller in an inking unit of a rotary printing press, wherein machine oil is supplied to the interior of the ink duct roller as a temperature control medium, and a line system for the machine oil is connected to an oil circuit and an oil reservoir of the printing press, includes temperature controlling and cooling, in a separate system, the machine oil supplied to the ink duct roller from an oil circuit of the printing press.

Abstract: A heat recovery management system for transferring an image to a print media in a development system of the type having an intermediate belt. The system comprises a first station that receives an energy-transfer medium to heat the belt at a first position utilizing heat from the energy-transfer medium. The first station outputs the energy-transfer medium with a reduced heat content and a second station receives the reduced heat content energy-transfer medium from the first station. The second station absorbs heat from the belt at a second position after which the second station outputs heat enriched energy to the energy-transfer medium and circulates the heat enriched energy-transfer medium back to the first station.

Abstract: A folding device in which printing-material webs are cooled in an effective manner includes guide rollers and/or feed rollers designed as cooling rollers. Alternatively or in conjunction with the cooling rollers, there are cooling arrangements in the folder superstructure and compressed cooling air flows from these cooling arrangements onto the surfaces of the printing-material webs.

Abstract: Disclosed is a film roller in an inking unit of a rotary printing machine. The film roller is equipped with an internal cooling system to eliminate irregularities in the ink transfer to the film roller and to improve print quality.

Abstract: A fixing mechanism for fixing a ink on a recording medium which is discharged by a recording device includes a first fixing area onto which heat sufficient to fix the ink is applied to the recording medium, a second fixing area which is closer to the recording device than the first fixing area and where a lower heat than the heat applied to the recording medium in the first fixing area is applied to the recording medium, and a conveyor for conveying the recording medium into the second fixing area and conveying it out of the first fixing area.

Abstract: A rotary press has a paper web supply apparatus, a printing apparatus, and a post-printing processing apparatus. The rotary press further includes at least one heating roller provided in a path along which a paper web carrying printed images runs from the printing apparatus to the post-printing processing apparatus, as well as at least one cooling roller provided downstream from the heating roller. The heating roller and the cooling roller are disposed such that the running paper web contacts each of the rollers over at least one-fourth of the circumference thereof. The heating roller is rotated at a circumferential speed different from a running speed of the paper web. The heating roller is a cylindrical body equipped with a built-in coil to which alternating current is supplied. The heating roller has cavities which are formed in a mutually communicating manner in the wall thereof and are filled with a thermal medium, and the outer surface of the heating roller is roughened.

Abstract: An inking device in a printing machine with an ink body filled with printing ink and with a blade. The blade can also be a chamber blade, for example. For temperature moderation, an insulation plate or a heat dissipation plate, by which the temperature of the blade can be adjusted, is arranged on the blade. The heat created by friction between the upper edge of the blade and the surface of the cup roller does not penetrate into the ink duct due to the insulation plate and the heat dissipation plate, so that heating of the printing ink is avoided.

Abstract: A formulation comprising a heat sensitive cross-linkable ink and carbon black is coated over substantially the entirety of an ink-repellent/ink-releasing surface of a printing cylinder of a printing press by heating the formulation and/or the outer surface of the printing cylinder so that the formulation adheres to the cylinder to provide a continuous coating thereon. The coated printing cylinder is then allowed to cool to ambient temperature whereafter it can be imaged using a digitally controlled laser. The imaged printing cylinder may be developed during press start up by application of waterless ink over the cylindter surface in order to remove the non-imaged areas comprising non-cross-linked ink. After completion of printing, the printing cylinder can be cleaned by using an appropriate solvent to solubilize the cross-linked ink in the imaged areas and subsequently re-used.

Abstract: The invention relates to a printing process, such as lithographic printing, that requires a printing press and a colorant vehicle. To enable constituting and rapidly removing motifs to be transferred to a printing medium, a hardenable material having good affinity for the colorant vehicle is deposited automatically and directly onto a device that cannot be dismantled or detached from the press, i.e., is part of the press, and that is constituted of a material having an opposite affinity, so as to constitute the motifs to be transferred to the medium. The material constituting the device is such that the material can be removed rapidly when the motifs are to be changed, and is such that new motifs can be constituted there immediately after the removal of those preceding them.

Abstract: Phase change carrier compositions made from the combination of at least one urethane resin; at least one urethane/urea resin; at least one mono-amide; and at least one polyethylene wax are disclosed. The order of addition of the reactants to form the reactant product urethane resin and urethane/urea resin permits the tailoring or design engineering of desired properties.

Abstract: A dryer unit which is integrated as a module into a printed material guide system of a printing machine in order to facilitate two-sided drying of printed material is provided. The printed material guide system includes a guide surface which has a plurality of openings and an air system which is selectively operable in positive or negative pressure modes to assist the guiding of the printed material. The dryer module is arranged in an opening in the guide surface such that it heats at least one side of the printed material. At least one outlet opening is associated with the dryer module. The outlet opening is open into the plane of the guide surface and is coupled to a cooling system which is operable to provide cooling air to the dryer module.

Abstract: In an assembly for controlling the temperature of a fountain fluid and/or selected rollers of a printing machine, which includes a fountain fluid circulating system, a cooling fluid circulating system, a refrigerant circulating system, and a means for selectively operating one or, simultaneously, more than one of the circulating systems, a common heat exchanging means is provided. The common heat exchanging means comprising a plurality of flow passages disposed in heat exchanging adjacent relationship with each other, and a distributing means for connecting each of the circulating systems to a selected series of flow passages of the common heat exchanging means. Adjacent flow passages can be connected to different circulating systems for heat exchange therebetween. The temperature-controlling assembly therefore can be operated in different heat exchanging functions.

Abstract: The present invention relates to the use of shellac as the binder in an ink composition to reduce the problems of sweating when the ink is applied to a soft gelatin surface. Preferably, the shellac is at leat partially neutralised by a volatile base, for example ammonia, to render the shellac water soluble so that a water and/or alcohol liquid carrier medium may be used.

Abstract: A dryer (10, 200) is provided for use in drying freshly printed substrates such as corrugated sheets (14). A plurality of infrared heating lamps (28) are positioned below the travel path (16) of the corrugated sheets (14) and the heat lamps are physically separated from the corrugated sheets by glass panels (108, 110). Provisions are made for cooling the heat lamps by air flow. A plurality of air bars (40) are also provided with pressurized air to discharge air through ports (42) in the upper surfaces thereof for discharge against the corrugated sheet. Air discharged against the corrugated sheet and used to cool the heat lamps is collected and removed by a vacuum pump (48). This pump (48) is also used to remove moisture laden air which has been dislodged from the sheets by the combination of infrared heat and high pressure air.

Abstract: A process for enzymatic discharge printing of the surface of dyed fabric, especially cellulosic fabric such as denim, including an oxidoreductase and enhancing agent system.

Abstract: A method for controlling and regulating a dryer in a rotary printing press having a varnishing device for varnishing printing stock processed in the printing press, includes measuring the intensity of a microwave signal after the microwave signal has interacted with varnished and dried printing stock fed through the rotary printing press; from the measured radiation intensity of the microwave signal, forming a status variable representing a measure of the degree of drying of the printing stock; and varying drying power provided by the dryer as a function of the formed status variable; and a device for performing the method.

Abstract: There is described herein a method and apparatus for capturing the heat from the web in a web printing system, storing this heat, and then using it to warm the chill rolls to prevent condensation. Particularly, a heat storage tank is used in conjunction with a chill roll cooling system. During startup, the heat from the web is stored in this tank until the reservoir in the tank reaches a pre-set temperature, at which time the chilled water from the chill system is directed to the chill rolls. At each web stoppage, the water from this heat storage tank is flushed to the chill rolls to keep the chill roll temperature above the condensation temperature.

Abstract: A multi-colored silk screen printing machine has an improved electric resistance heating station to cure silk screen printed ink on a substrate such as a textile. A control system has a proximity switch that detects the presence of a pallet within the heat curing station and starts supplying electrical power to a bank of electric resistance heaters automatically only when a pallet is present. An infrared temperature sensor is used to measure the ink temperature when the bank of electric resistance heaters is heating the printed ink on the textile. The infrared sensor provides a signal to a control system that interrupts power to the bank of electric resistance heaters when the signal exceeds a preselected maximum ink temperature value. A timer can also be used to override the infrared temperature sensor. A sheltered passageway and a low level air flow therethrough protect the face or lens of the infrared sensor from gases, smoke or other types of contamination.

Abstract: An apparatus and method for preventing condensation in a selected area of a printing press, for example a dampener system, by, for example, controlling the air temperature surrounding the dampener system by cooling, heating or changing the humidity of the air such that the temperature difference between the components of the dampener system and the surrounding air has a desired value.

Abstract: A process for thermal transfer printing on plastic films incorporating a coating composition is provided. The process includes providing plastic film having a coating composition including a binder of a polymer and/or copoylmer of carboxylic acid containing vinylic unsaturation, at least one finely divided particulate filler, and a surface active agent. A thermographic element such as a ribbon which includes a dye layer is then heated in the form of an image to be printed onto the plastic film, with the heating causing the dye layer to melt in the form of the image. The plastic film coated with the coating composition is contacted with the thermographic ribbon, and the dye layer is transferred from the ribbon to the plastic film. Such thermal transfer printing on coated plastic films provides for a multitude of uses such as plastic labels for outdoor use.

Abstract: Solid compositions containing diamidediurethanes are useful as components of hot-melt inks. Diamidiurethanes may be prepared by reaction of a hydroxycarboxylic acid and/or lactone with either (1) monoamine and diisocyanate or (2) diamine and monoisocyanate. Alternatively, the diamidediurethane may be prepared by reacting a non-hydric carboxylic acid and/or anhydride with an hydroxyamine and a dfisocyanate. The reactant identity and stoichiometry, as well as the reaction conditions, may be tailored to optimize the formation of diamidediurethane in preference to high molecular weight oligomers. The hot-melt inks may be used in ink jet, flexographic, gravure and intaglio printing.

Abstract: Dry offset printing unit having at least one plate cylinder and at least one blanket cylinder, and being equipped with a cooling circuit wherein a fluid coolant circulates, includes at least one chill roller incorporated into the cooling circuit, the at least one chill roller being bringable into contact with the surface of the at least one blanket cylinder.

Abstract: A second heating device heats an inner wall of an ink chamber of a print head to a temperature not lower than the melting point but not higher than evaporating temperature of ink 3, for a prescribed time period after the end of printing, based on a signal from a second heating control device. Consequently, the ink solidified and deposited on the inner wall of ink chamber and not used for printing is liquefied and recovered to the ink chamber to be used for the next printing.

Abstract: A blower arrangement for detachment of a metallized belt from a sheet and for creating a braking force on a sheet, which belt and sheet are situated between platens of a press in a machine for printing sheet elements which comprises a bar arrangement near the exit of the press in which is provided a series of nozzles having the form of flattened parallelpipeds, each of these nozzles being sealed by a translational mobile cylindrical valve member movable perpendicular to an air supply duct with the valve member having a communication passage. The plane of the jets coming from the nozzles is directed approximately horizontally between the metallized belt and the sheet.

Abstract: Apparatus and a method for printing and drying layers of ink applied to the surface of a continuous substrate in a multi-stand offset press comprising a plurality of stands, each having a printing portion for the application of a layer of ink to the substrate as it passes through the stand, and a drying assembly mounted after and adjacent each printing stand portion and adjacent the substrate for drying the substrate and layer of ink thereon after passage therefrom. The drying assembly comprises an emitter-cooler that radiates energy toward the ink-layered substrate and gas duct that directs air toward the ink-layered substrate to dry the substrate and layer of ink thereon contributing to further drying thereof and evaporation of water vapor and solvents arising therefrom.

Abstract: An apparatus cabinet for providing process water, particularly for printing presses, having a housing with a top, intermediate and bottom level. A water conditioning device at the intermediate cabinet level a water-temperature control device having a coolant compressor arranged at the bottom level, a coolant condenser arranged at the top level, and a cooling blower device at the top level for conveying cooling air over the coolant condenser and out of the apparatus cabinet.

Abstract: Offset printing cylinder is formed of a basic cylinder body and a printing cover disposed on an outer cylindrical surface of the cylinder body, the printing cover including a plurality of layers of which at least one is a heat-removing layer having a location selected from a group thereof consisting of a location intermediate two other layers of the printing cover and a location at the bottom of the printing cover.

Abstract: The web of fabric (9) passes over an input roll (10) arranged substantially at the level of the upper portion of the heating drum (1), around at least half the circumference of which it winds after coming into contact with a web of transfer paper (14). The drum and the pressing roll (2) between which the webs pass are received inside one and the same closed housing (3) swept by air that becomes laden with the vapors of the transport agent, the laden air being delivered to a tank of cold water (22). The apparatus finds use in the printing of fabrics made of vegetable fibers, in particular cotton.

Abstract: A printing mechanism for waterless offset printing, including a form cylinder that carries a sleeve-shaped printing form and/or a transfer cylinder that carries a sleeve-shaped transfer form. The printing form and transfer form can be slipped onto or removed from the respective cylinder. At least one of the form cylinder and the transfer cylinder being provided with an internal channel through which fluid is circulated for internally cooling the cylinder.

Abstract: A printing unit (1) of a rotary printing press for using various ink types is provided. The printing unit includes an inking mechanism (45), a print cylinder (3), and a blanket cylinder (2). The inking mechanism (45) and the cylinders (2, 3) are mounted in side walls of the printing unit (1). A housing (14) at least partially surrounds the inking mechanism (45) and the cylinders (2, 3) to maintain a surrounding atmosphere within an at least semi-enclosed area (100) of the printing unit (1). A chemical agent is selectively added to the atmosphere in the semi-enclosed area (100) to reduce the rate of evaporation of a substance in the ink.

Abstract: A method for cleaning cylinders of a rotary printing press having washer and suction devices and an adjacently mounted dryer which shortens the down time during the cleaning operation and at the same time satisfies safety requirements. At the beginning of a cleaning process, the dryer is reduced from its normal operating output level to a predetermined lower operating output level which eliminates the risk of combustion with cleaning fluid vapors. At the end of the cleaning process, the operating output of the dryer is increased from its reduced level to its normal operating level in a significantly shortened period of time, as compared to conventional practice, resulting in reduced down time for the printing machine during the cleaning operation.

Abstract: A temperature-control device particularly for an offset printing machine for at least two separate liquids in the machine. Dampening solution circulates in a first liquid circulation circuit to printing plates or the like receiving the dampening solution. A first heat exchanger communicates with a cold generator and the first liquid circulation circuit passes through a first heat exchanger. The second cooling solution of the printing machine cools parts of the machine and is in a second liquid circulation circuit. The second liquid circulation circuit passes through the second heat exchanger. After passing through the first heat exchanger, the first liquid circulation circuit also passes through a second heat exchanger, whereby heat is exchanged between the first and second liquid circulation circuits. The second liquid circulation circuit includes a controllable bypass for selectively bypassing the second liquid past the second exchanger.

Abstract: Method for supplying a printing unit of a printing press with ink which is solid at normal temperature includes supplying the printing unit with ink in the form of solid bodies, and melting the solid ink bodies in the printing unit and applying the ink in a molten state to a cylinder of the printing unit.

Abstract: A printing system is provided which includes a printing head for applying at least one ink to a printing substrate and at least one radio frequency (RF) drying unit for discharging RF energy, thereby drying the ink on the printing substrate. A printing system is also provided which includes a printing and drying head for applying at least one ink to a printing substrate and for subsequently drying it. The printing system further includes means for moving the printing head with respect to the printing substrate.

Abstract: Apparatus and a method for printing and drying layers of ink applied to the surfaces of sheets fed through a press and discharged from the press delivery end, without the use of powders, one upon another onto a stacker without off-set or blocking, comprising a plurality of stands, each having a printing portion for the application of a layer of ink to the sheets, and a drying assembly mounted after and adjacent thereto for drying each sheet and the layer of ink thereon within the press stand prior to passage therefrom. The drying assembly comprises an emitter-cooler that radiates energy toward each sheet to dry the sheet and layer of ink thereon and a gas conduit that directs gas from a nozzle toward each sheet and the layer of ink thereon contributing to further drying thereof and evaporation of the water vapor and solvents arising therefrom.

Abstract: An assembly for controlling the temperature of a fountain fluid and/or selected drums of a printing machine comprises a fountain fluid circulating system for supplying a fountain fluid application means with a fountain fluid, a cooling fluid circulating system for supplying a drum cooling means with a cooling fluid, a first internal cold source which is in heat-exchanging relationship with the fountain fluid circulating system, a second external cold source which is in heat-exchanging relationship with the cooling fluid circulating system, and a means for selectively operating one of the circulating systems, for the fountain fluid or the cooling fluid, or both of these circulating systems. Further the condenser means of the first cold source is in heat-exchanging relationship with the refrigerant circulating system of the second cold source. The temperature controlling assembly thereby allows the requirements for cooling energy to be precisely matched to the currently effective operational mode.

Abstract: A process is disclosed for transfer printing thermoplastic materials with thermal diffusion inks. An image is transferred in a heatable press from a paper substrate colored with thermal diffusion inks onto an intermittently moved, fiber-containing carrier material into which the thermal diffusion inks can at first be sublimated then diffused. This fiber-containing carrier material provided with thermal diffusion inks is then transported into the gap between the calender rollers, where it is continuously brought into contact with a thermoplastic melt at an increased temperature so that the thermal diffusion inks penetrate into the thermoplastic melt and at the same time a composite strip made of the fiber-containing carrier material and the thermoplastic melt is formed. The products obtained by this process are suitable for producing a decorative layer on parts of skis or snowboards and on composite materials made of fiber-reinforced plastics.

Abstract: A printing unit for rotary printing press includes an inking unit and a print cylinder carrying a print form suitable for the reception of water based inks. The printing unit also includes a blanket cylinder carrying a printing blanket and a cooling unit for maintaining an ink carrying surface of one or more of the print form, the printing blanket, and the inking unit at a predetermined temperature which is suitable for printing with water-based inks.

Abstract: The invention is to a method of placing symbolization on a heat spreader, used in conjunction with the semiconductor package, through the use of a low powered laser beam. The beam is scanned over the package surface at a preset intensity and for a desired time to change the surface texture of the heat spreader, and to change the reflectivity of the scanned area.

Abstract: A plurality of inking blade plates are positioned in abutting fashion between cooperating insertion and clamping strips to form an inking blade. A temperature differential is created between the blade plates and the strips which are then allowed to return to a common temperature. This creates a uniform spacing between each of the inking blade plates in the inking blade. The resulting inking blade is usable with an ink ductor roller in a rotary printing press.

Abstract: A process and apparatus for printing with a press at least one image by transfer of an electrostatic colorant vehicle between an intermediate transfer element and a printing carrier, including the steps of making the intermediate transfer element in the press by magnetically developing zones on a substrate, depositing a magnetic, insulating, and hardenable material on the substrate to constitute the zones, hardening the hardenable material, subjecting the hardenable material to an electrostatic charge in order to lend the zones an affinity for the colorant vehicle, and transferring the colorant vehicle to the printing carrier by directly contacting the intermediate transfer element to the printing carrier.

Abstract: A process for correcting misregistration between imprinted images from successive printing stations comprising measuring the width of the imprinted image of each station and comparing the width to determine any difference, and creating a correction signal if a difference does exist to change the humidity in the web passing through the printing unit. The device includes photoelectric devices for determining the width of each image created at each station, an electronic device for comparing the width of each image and, if a difference exists, creating an error signal which is applied to the first drying unit and a secondary error signal applied to the second unit to correct the humidity of the web leaving each dryer.

Abstract: A method of printing a material web includes the steps of applying ink to the material web, subsequently drying the material web with the use of heat and subsequently drying the material web, and, after cooling and prior to further processing, moistening the material web while simultaneously applying heat to the material web, and subsequently once again cooling the material web. An apparatus for carrying out the method includes, in a travel direction, a printing unit, a drying section following the printing unit, a cooling section following the drying section, a moistening section following the cooling section, and an after-cooling section following the moistening section.

Abstract: A method and an apparatus for the printing of foil webs in web offset printing are proposed in which strongly oxidatively drying inks are used, the printed foil webs are subjected to a heat-air drying, the printed foil webs are furthermore conducted over at least one cooling roll before they are wound up, and the tension of the web upon the winding is reduced as the diameter of the roll increases.

Abstract: A water distribution system is disclosed in an ink flow temperature control system of a plurality of printing presses such as multi-color offset perfecting and nonperfecting web and sheet fed presses. The system includes a plurality of printing presses each having at least one printing head whereat water is used to control the temperature of ink distributed through the head. A multiple zone control unit controls the temperature of water distributed to the printing heads of the plurality of printing presses. An enlarged rigid conduit extends between the multiple zone control unit and each printing press. A plurality of flexible non-metallic distribution hoses are located within the enlarged rigid conduit for distributing water between the multiple zone control unit and the printing heads of the plurality of printing presses.

Abstract: A printing mechanism for waterless offset printing including a form cylinder that carries a sleeve-shaped printing form and/or a transfer cylinder that carries a sleeve-shaped transfer form such that the forms can be slipped onto or removed from their respective cylinder. Both the transfer cylinder and the form cylinder having internal and external cooling arrangements.

Abstract: An inking unit for printing presses, preferably offset printing presses, can have a plurality of plate-inking rollers for inking a plate cylinder along with a multiplicity of inking rollers. The inking rollers can be positioned to supply ink flow, in at least two directions to the plate-inking rollers. The inking rollers and the plate-inking rollers can then form a closed chain of rollers, and can enclose a space therebetween. A measuring device can be provided to monitor the temperature of the air within this space, with measured values being used for control of the temperature of the inking unit.