Abstract: Devices and methods are provided for treating, preventing from growth, and neutralizing microorganisms using high-frequency, low-energy ultrasound. A particular method is provided for treating a fountain solution including simultaneously exposing the fountain solution to gas microbubbles and high-frequency ultrasound. A particular device is also provided, including a compartment for holding a reservoir of fountain solution, a gas microbubble emitter configured to emit microbubbles into the compartment, and a high-frequency ultrasound-emitter configured to emit ultrasound signals into the compartment. The high-frequency ultrasound may be higher than 100 kHz.

Abstract: A method for operating an offset printing press having at least one printing unit with an inking unit, a plate cylinder for receiving a printing plate, a blanket cylinder, an impression cylinder and a dampening unit, and for controlling an application of dampening solution from the dampening unit onto the plate cylinder, includes predampening the printing plate. After a printing pressure has been switched on between the blanket cylinder and the impression cylinder and after a printing material transport through the offset printing press has been switched on, a supply of dampening solution to the plate cylinder in the printing unit is reduced to a pronounced extent at least once for a short predefined time period, as a result of which an excess of dampening solution produced by the predampening does not accumulate permanently in the inking unit. A printing press for carrying out the method is also provided.

Abstract: A system for driving the damping roller in rotary printing machines. The system has a driving mechanism for the damping roller, while the plate cylinder is being driven separately by an individual driving mechanism, for realizing the delta mode of operation. In this mode of operation, the driving mechanism of the damping roller can be disengaged through a switchable transmission from the driving gear train and connected with the individual driving mechanism of the plate cylinder.

Abstract: A spray bar includes a manifold or multiple manifolds located on the spray bar. More specifically, the spray bar includes one or more manifolds connected to dedicated feed lines each having a spray head, resulting in improved lateral spray distribution.

Abstract: A roller closing device is provided with an inner element and with an outer element. These two elements are arranged at least partially in a coaxial manner. The inner element can be deflected radially with respect to the outer element by the use of at least one elastic body which is arranged between the two elements. This elastic body is configured as a rolling diaphragm. A seal is configured between the inner element and the outer element. The seal closes off a gap between the two elements to prevent impurities from entering the roller closing device when any radial deflection of the inner element takes place.

Abstract: A device is used to set a contact pressure between a displaceable roller and another roller or for moving the displaceable roller with respect to the other roller. At least one actuator is subjectible to the action of a pressure medium and presses the displaceable roller toward the other roller with an adjustable force. The pressure of the pressure medium can be adjusted by a valve. A switchover device is provided for use in connecting the valve to different actuators, as desired.

Abstract: A cylindrical filter for use in a lithographic printing press recirculation system of the type that circulates fountain solution from a printing press pan, where it is applied to the printing press plate by means of a roller system, through the filter positioned in a reservoir or sump and then back to the roller system. The filter is generally cylindrical in shape and includes a hollow core extending along the central longitudinal axis of the filter, an inner surface surrounding the hollow core, an outer surface and porous filtering medium disposed between the inner surface and outer surface. The hollow core extends from a first closed end of the filter to an opposite second open end, which is removably coupled to a hose which channels the fountain solution from the printing press pan. The filtering medium comprises a graded density whereby the density at the outer surface of the filter is greater than the density at the inner surface of the filter.

Abstract: An inking or dampening unit includes an applicator roll mounted on levers so that the application roll can be pivoted about a distributor cylinder onto a form cylinder with a controlled throwing-on force.

Abstract: A method of and apparatus for extending the life of fountain solutions used in commercial printing presses comprises withdrawing fountain solution from the dampener recirculation system of a printing press and directing the withdrawn fountain solution through a sediment prefilter, a separation filter, and a post treatment filter. The sediment prefilter preferably comprises a melt blown polypropylene filter; the separation filter preferably comprises a diatomaceous earth filter; and the post treatment filter preferably comprises a zeolite filter.

Abstract: A method for cleaning the fountain solution of a printing press with an automatically emptying separator (16), separates the dirt particles and oil residues from fountain solution and supplies them, as a mixture of dirt and fountain solution, to a dirt and fountain solution container (24) and passes the remaining fountain solution into a fountain solution storage tank (20). The dirt and fountain solution mixture in the dirt and fountain solution mixture container (24) is caused to settle in layers and the layer, containing the fountain solution, is transferred by an overflow (26) in to the fountain solution storage tank (20).

Abstract: In a dampening water measuring apparatus, light emitted from a semiconductor laser has its beam expanded by an objective lens, and is then reflected by a beam splitter to irradiate a non-image area on a surface of a printing plate P. The laser beam reflected from the non-image area on the surface of the printing plate passes through the beam splitter, and enters a CCD camera. The CCD camera measures speckle intensity of the incident laser diffused light, and transmits measurements to a controller through an interface.

Abstract: A dampening system has at least one dampening ductor or roller; a dampening agent bin or trough, which holds a dampening agent, a feeding device, and a return device. The feeding device includes at least one dampening agent distributing pipe that has a number of spaced openings. A number of these dampening agent distributing pipes are assigned to the dampening ductor or roller.

Abstract: Methods for performing a roller adjustment in a printing press include an axial spacing adjustment and an oblique position adjustment. The oblique position adjustment is carried out along a straight line of movement which extends perpendicularly relative either to another straight line of movement of the axial spacing adjustment or to a tangential line of a pivoting circular arc of the axial spacing adjustment.

Abstract: A roll for a printing press has at least two circular partial areas (25, 33) made of an ink-friendly material and at least one circular partial area (23, 34) made of an ink-repellent material, which is arranged between the at least two circular partial areas (25, 33) made of ink-friendly material. A process is provided for manufacturing such a roll, wherein at least two annular structures (25, 33) made of an ink-friendly material and, located between these annular structures, at least one annular structure (23, 34) made of an ink-repellent material are formed on a blank roll body (20, 30).

Abstract: A printing material processing machine has an oscillating roll with a roll shaft, a roll barrel rotatably and translatorily mounted on the roll shaft, and an oscillating mechanism for moving the roll barrel to and fro along the roll shaft. The oscillating roll is mountable on a roll lock. A fixing device is provided and constructed in such a way that, in a dismantled state of the oscillating roll, in which the latter is released from the roll lock, the fixing device secures the roll barrel against displacement along the roll shaft and, in an installed state of the oscillating roll, in which the latter is mounted in the roll lock, permits the axial to and fro movement of the roll barrel.

Abstract: A method of and apparatus for extending the life of fountain solutions used in commercial printing presses comprises withdrawing fountain solution from the dampener recirculation system of a printing press and directing the withdrawn fountain solution through a sediment prefilter, a separation filter, and a post treatment filter. The sediment prefilter preferably comprises a melt blown polypropylene filter; the separation filter preferably comprises a diatomaceous earth filter; and the post treatment filter preferably comprises a zeolite filter.

Abstract: A printing machine includes a printing form cylinder, a first roller, a second roller, a third roller, a fourth roller, and a dampener roller. The machine has a defined roller control position, wherein the first roller engages with the dampener roller, the third roller and the fourth roller, the second roller engages with the dampener roller, and the dampener roller engages with the printing form cylinder. In this same roller position, the second roller further engages with the third roller.

Abstract: A method of and apparatus for extending the life of fountain solutions used in commercial printing presses comprises withdrawing fountain solution from the dampener recirculation system of a printing press and directing the withdrawn fountain solution through a sediment prefilter, a separation filter, and a post treatment filter. The sediment prefilter preferably comprises a melt blown polypropylene filter; the separation filter preferably comprises a diatomaceous earth filter; and the post treatment filter preferably comprises a zeolite filter.

Abstract: A method of operating a press that has a damping unit which contains a damping unit roller is performed during a printing interruption. During the printing interruption, the damping unit roller is supplied discontinuously with damping solution replenishment and, as a result, the damping unit roller is kept ready for a printing operation.

Abstract: A color registration control system for a printing press including an area scanner for acquiring an image of a paper substrate and an image processing system adapted to receive the image and process the image to determine any color register error.

Abstract: A novel damping control method permits improved reliability and higher accuracy when registering scumming during printing with an offset press. Signals are obtained by at least one sensor aimed at a revolving printing form cylinder. The signals are processed in a control device, actuating signals for a dampening solution metering device are produced, and the dampening solution is metered in accordance with the actuating signals by a dampening solution applicator roll in rolling contact with the surface of the printing form. The sensor provides a signal which reproduces an actual value of a width of an ink stripe that is induced by the process and located in the circumferential direction of the printing form cylinder. The stripe is formed in the printing image-free region of the printing form immediately after the trailing edge of the channel accommodating the edges of the printing form.

Abstract: A washing device for an impression cylinder jacket in a sheet-fed offset two-sided printing press equipped with an impression cylinder installed with a jacket having a metal plate, a base layer formed to have concave-convex profile on the surface of the metal plate and a low surface energy resin layer formed on the base layer, includes a controller that executes a first control of causing a plate cylinder to contact with a blanket cylinder as well as the blanket cylinder to contact with the impression cylinder, and causes each cylinder to rotate under those contacts for a specified period of time while a cleaning unit is in contact with the blanket cylinder; and a second control of separating the plate cylinder from the blanket cylinder, and causing a water form roller and an ink form roller with the plate cylinder.

Abstract: A form dampening roller driving apparatus in which to obviate a hickey a slip is caused to occur between a form dampening roller and a plate cylinder in their mutual area of contact by rotationally driving the form dampening roller and the plate cylinder so they rotate having a difference in peripheral speed between them, and wherein the peripheral speed of the form dampening roller is made variable as desired to make the slip ratio between it and the plate cylinder in their mutual area of contact variable as desired. To this end, the form dampening roller is geared to a vibrator roller, and independent of a main motor for rotationally driving the plate cylinder there is provided a further motor for rotationally driving the form dampening roller independently of the plate cylinder at a rate of rotation that is made arbitrarily variable.

Abstract: An ink removal method for a printing press includes an ink removal step of bringing ink form rollers and a dampening form roller into a throw-on state relative to a plate cylinder, and bringing the dampening form roller into a throw-off state relative to a ductor roller of a dampening unit. The ink removal method has high general purpose properties, and can remove ink from the dampening form roller with high accuracy by simple means, i.e., changing throw-on and throw-off timings for existing rollers without using a rider roller or the like.

Abstract: A method of operating a press that has a damping unit which contains a damping unit roller is performed during a printing interruption. During the printing interruption, the damping unit roller is supplied discontinuously with damping solution replenishment and, as a result, the damping unit roller is kept ready for a printing operation.

Abstract: A roll for a printing press has at least two circular partial areas (25, 33) made of an ink-friendly material and at least one circular partial area (23, 34) made of an ink-repellent material, which is arranged between the at least two circular partial areas (25, 33) made of ink-friendly material. A process is provided for manufacturing such a roll, wherein at least two annular structures (25, 33) made of an ink-friendly material and, located between these annular structures, at least one annular structure (23, 34) made of an ink-repellent material are formed on a blank roll body (20, 30).

Abstract: A fountain for a dampening unit of an offset printing machine includes a container having an inlet for dampening solution and a return for the dampening solution. The container is formed with a base, at least one side wall connected to the base and a dam disposed on the base. The dam is formed with an upper edge that is lower than an upper edge formed on the one side wall. A dividing wall has a run-off edge and an infeed edge. The dividing wall is seated on the upper edge of the dam and, starting from the dam, extends over the base to as far as the infeed edge. The infeed edge defines the level of the dampening solution in the fountain.

Abstract: The subject invention discloses a dampener having a device for precisely metering dampening solution on a printing press. The dampener includes a form roller in contact with a plate cylinder on the printing press and a metering roller in contact with the form roller. The metering roller is supported in the dampener with eccentric collars. Adjustment devices are used for adjusting the eccentric collars to move the metering roller toward or away from the form roller. The adjustment devices can be adjusted without tools while printing press is running and the safety covers of the press are closed.

Abstract: A device for controlling delivery of an amount of fluid has a first rotating device having at least one peripheral first fluid transfer section, a second rotating device having at least one peripheral second fluid transfer section, and a device for setting a phase between the first and second fluid transfer sections. The device may be used for providing ink or dampening solution in a printing press.

Abstract: A method of adjusting dampening-solution feed of an offset printing press by a control device includes determining a required dampening-solution demand for a first calibration printing form with a known minimum percent area coverage and for a second calibration printing form with a known maximum percent area coverage at a calibration speed, and storing the dampening-solution demand in the control device as interpolation reference points; determining a percent area coverage lying between the maximum and the minimum percent area coverage of the calibration printing forms of a printing form to be used for a forthcoming print job, and passing the determined percent area coverage on to the control device; determining by the control device the dampening-solution demand required for the forthcoming print job with the printing form provided for the purpose at the calibration speed, by interpolating between the interpolation reference points; determining a printing-speed dependent characteristic curve of the dampening

Abstract: A drive module for attachment to a rigid panel and adapted to apply bending wave energy at audio frequencies to the panel whereby the panel can radiate an audio output. The drive module has a housing adapted to be secured to the panel, at least one foot on the housing and adapted to fix the housing securely to the panel, an electro-mechanical transducer in the housing, a support for the transducer in the housing, the transducer being adapted to contact the panel to apply bending wave energy thereto when energized with an electrical audio signal, and an audio signal amplifier in the housing.

Abstract: A sleeve (10) for flexographic printing includes a sleeve body (2) made of an at least partially non-electroconductive material, which within its inside (4) is mountable on an electroconductive king roll on the outer wall of the roll, of a printing press, the king roll being designed as an air cylinder, and exhibiting at least one contact zone with the king roll. The sleeve exhibits an electroconductive surface (6), which is connected to the contact zone via at least one electroconductive element (20) provided in the sleeve body (2) for diverting electrostatic charges into the outer wall of the roll of the king roll. The sleeve is therefore given an electroconductive structure, through which the unavoidable electrostatic charges in printing presses with a plurality of printing couples are diverted via the king roll before it reaches a scale that would suffice for a discharge, ignition, or deflagration of the solvents used in the printing.

Abstract: In order to achieve a good printed result, it is important that the rollers that interact with each other are arranged at a suitable distance from each other, so that they act on each other with the pressure as stipulated. In order to set the rollers, use is made of a stripe, in particular an ink stripe, which results from contact between the rollers in the rest state. After the transfer, i.e., the formation of the strip, the relevant roller must be rotated into a position wherein the printing machine operator can have access to the ink stripe. As a result of the safety devices provided in printing units, it is generally not possible to detect, however, when the ink stripe on the roller appears in the suitable position. The invention provides a remedy here, in that it is proposed to rotate the roller into the viewable position at a suitable speed, or, by using a special program, taking into account a predefined rotational angle, to move the rollers automatically into the viewable positions.

Abstract: A method of tempering a printing press with a circulating tempering medium includes regulating a temperature of the tempering medium. The temperature at a first measurement location is measured for purposes of control during production printing by the printing press. The temperature at a second measurement location is measured during a tempering phase of the printing press preceding production printing.

Abstract: A seal apparatus is disclosed for sealing dampening solution which is disposed within a reservoir extending from a nip defined between a form roller and a metering roller of a lithographic printing machine. The apparatus includes a source of pressurized air and device for directing a flow of air from the source of pressurized air towards an edge of the reservoir and between the form and metering rollers such that the flow of air generates an air dam for sealing the reservoir so that leakage of the dampening solution from the edge of the reservoir is inhibited.

Abstract: A seal for a chambered doctor blade (10) of a printing machine, in the form of a rubber-elastic body, which is inserted at the end of the chambered doctor blade in a seal holder (18) and lies against the periphery of a roller (12) against which the chambered doctor blade is placed, wherein the part of the seal (20) taken up in the seal holder (18), is constructed as a solid, rectangular support (22), which lies, with one end face, with a smooth surface (42), in contact with the chambered doctor blade (10) and is surrounded at the three remaining sides by continuous tolerance equalization lips (44).

Abstract: A printing system is disclosed including an inking system with a single form roller for applying ink to a printing cylinder. Ink is applied to the form roller by an applicator roller having a surface with an array of interconnected wells and a variable speed drive. The form roller and plate cylinder are rotated at the same rpm while the speed of the applicator roller is varied to vary the amount of ink applied to the plate. A variable speed subtractive roller system removes excess ink from the form roller and returns the ink to a common reservoir. For wash-up, the press drive and form roller are disengaged and the inking system is rotated by an inker roller drive while wash-up fluid is applied to the inking system.

Abstract: A method for regulating the ink-to-wetting agent equilibrium in a rotary offset printing machine, the wetting agent quantity being determined especially using the signals of a sensor which measures the light reflectance of an area on the printing form of the rotary printing machine that is wetted by a wetting agent.

Abstract: A method for controlling a quantity of medium transferable from a screen roller of a printing machine onto a roller that is in contact with the screen roller includes exerting an influence upon a difference in circumferential speed between the screen roller and the roller in contact therewith, and further includes controlling the difference in the circumferential speed as a function of the printing speed of the printing machine, so that printed medium density remains at least approximately constant at least within a wide printing speed range.

Abstract: The method effects a closed-loop control of the quantity of dampening solution during printing. The metering of the quantity of dampening solution to be applied to the printing material is preferably a function of the printing speed. In addition, at least one of the variables that influence the requisite quantity of dampening solution in the printing process is taken into account.

Abstract: A color density measuring step is executed for measuring color densities of unprinted areas on prints. Then, a determining step is executed for determining from the color densities of the unprinted areas on the prints whether ink tinting has occurred. When the determining step determines that ink tinting has occurred, a dampening water adjusting step is executed for adjusting a dampening water feeding rate after feeding dampening water in an increased rate once. A variation in the ink feeding rate is prohibited for a predetermined waiting time after feeding dampening water in the increased rate once in the dampening water adjusting step.

Abstract: The present invention includes a dampening solution recirculator and a method for circulating dampening solution in a reservoir of a dampener. The dampening solution recirculator includes a tank for storing dampening solution, a pump for pumping dampening solution from the tank, a venturi positioned proximate the pump and the tank and including an inlet port in fluid communication with the pump, a suction port, and a discharge port in fluid communication with the tank. A feed conduit has a first end in fluid communication with the pump and a second end positioned above the reservoir. A suction conduit has a first end positioned at a predetermined level within the reservoir extending in a direction upwardly and away from the reservoir and a second end in fluid communication with the suction port.

Abstract: A roller structure in a printing press includes a dampening form roller, gear, belt, belt roller, clutch member, nut, movable element, and snap rings. The dampening form roller is supported rotatably and adapted to come into contact with a plate cylinder and oscillating roller, having different peripheral surface speeds, at their outer surfaces. The gear, belt, and belt roller transmit rotation of one of the plate cylinder and oscillating roller to the dampening form roller. The clutch member, nut, movable element, and snap rings connect/disconnect the gear, belt, and belt roller. When the gear, belt, and belt roller are disconnected by the clutch member, nut, movable element, and snap rings, the dampening form roller is rotatably driven by the other one of the plate cylinder and oscillating roller.

Abstract: A control system for regulating the composition of an emulsion ink made from an oil-based ink and a water-based fountain solution using a mixing and dispersing apparatus includes a liquid level sensor, means responsive to the liquid level sensor for maintaining a proper liquid level in the mixing and dispersing apparatus, and means for producing an emulsion ink with a water content value which is within a predetermined range from a desired water content value. The producing means includes a feedforward controller and a feedback controller for regulating water-based fountain solution input rate to the mixing and dispersing apparatus.

Abstract: A form dampening roller driving apparatus in which to obviate a hickey a slip is caused to occur between a form dampening roller and a plate cylinder in their mutual area of contact by rotationally driving the form dampening roller and the plate cylinder so they rotate having a difference in peripheral speed between them, and wherein the peripheral speed of the form dampening roller is made variable as desired to make the slip ratio between it and the plate cylinder in their mutual area of contact variable as desired. To this end, the form dampening roller is geared to a vibrator roller, and independent of the main motor for rotationally driving the plate cylinder there is provided a further motor for rotationally driving the form dampening roller independently of the plate cylinder at a rate of rotation that is made arbitrarily variable.

Abstract: An applicator roller includes a roller jacket having an outer cylindrical surface for picking up a liquid and, at least to some extent, for transferring the liquid. The roller jacket is formed with at least one perforation through which excess liquid is guidable into a hollow interior of the applicator roller. An assembly of an applicator roller and a rotating element disposed downstream therefrom in a liquid travel direction, a cooling roller stand integrated into a dryer and having the applicator roller, a cooling roller stand disposed immediately downstream from a dryer and having the applicator roller and a printing press having the applicator roller, are also provided. A method is provided for coating a material web.

Abstract: An offset printing press having a plate cylinder, a dampening unit and an inking unit. The dampening unit comprises a rotatable dampening form roller, a rotatable dampening fluid feed roller, and a rotatable auxiliary dampening roller. The rotatable dampening form roller is in removable contacting engagement with the plate cylinder along a contact stripe, and transfers dampening fluid to the plate cylinder. The rotatable dampening fluid feed roller is in removable contacting engagement with the dampening form roller and transfers dampening fluid thereto. The dampening fluid feed roller is in fluid flow communication with a dampening fluid source. The rotatable auxiliary dampening roller is in contacting engagement with the dampening form roller immediately upstream of the contact stripe.

Abstract: A method of feeding dampening water includes a density measuring step for measuring densities of first and second detecting patches 101 and 102 printed adjacent each other on printed matter 100 and presenting a difference in density variations after printing with varied feed rates of damping water and ink, a dampening water feeding step for controlling the feed rate of dampening water based on the densities of the first and second detecting patches 101 and 102 measured in the density measuring step, and an ink feeding step for controlling the feed rate of ink based on the densities of the first and second detecting patches measured in the density measuring step, and the feed rate of dampening water.

Abstract: A coating system for coating print carriers includes at least one pump, at least one selection valve, a first metering device and a second metering device. The first metering device and the second metering device are constructed differently from one another with respect to metering principles thereof. The pump and the selection valve are assembled into a modular supply unit constructed so as to be compatible both with the first and with the second metering device. A coating machine, such as a printing or varnishing machine which includes the coating system, is also provided.

Abstract: A method for controlling a quantity of medium transferable from a screen roller of a printing machine onto a roller that is in contact with the screen roller includes exerting an influence upon a difference in circumferential speed between the screen roller and the roller in contact therewith, and further includes controlling the difference in the circumferential speed as a function of the printing speed of the printing machine, so that printed medium density remains at least approximately constant at least within a wide printing speed range.