Abstract: A cleaning arrangement for a coater that has a plate cylinder, the cleaning arrangement having a cleaning web, a tangential moving mechanism configured to controllably move the cleaning web in at least one direction in a plane defined by the cleaning web, a radial moving mechanism configured to controllably move the cleaning web in at least one direction out of the plane, and a controller coupled to the tangential and radial moving mechanisms which is configured to control the moving of the cleaning web into and out of contact with the plate cylinder in conformity with input signals received by the controller.

Abstract: Method for cutting out coating plates for use in digital printing units. A method for cutting out coating plates for use in digital printing units, where the cutting of coating plates is effected by means of a digital cutting machine, the cutting machine including a computer control and further including a mother roller, the method including at least the following steps: •a file including at least cutting data is transferred to the computer control of the digital cutting machine; •a sleeve with coating plate material is mounted on the mother roller of the cutting machine; •the coating plate mounted on the sleeve and the mother roller are cut out in the ratio 1:1 whereby is achieved, among others, that a mounting machine is no longer necessary in order to apply coating material on a sleeve, whereby registering accuracy is increased and shrinking effect is avoided.

Abstract: Method for corona treatment using an apparatus having a corona treatment unit with an inlet side and an outlet side, one or more sets of transverse electrodes, at least one electrode in each set being connected to a high voltage source and at least one second electrode connected electrically to ground, wherein the second electrode connected to ground includes a rotatable roller. The method involving through-flow corona treatment of sheet material, the material being conveyed via a mechanical conveyor means. By such a solution sheets of material can be conveyed and corona-treated without holding the material and pulling it through the apparatus.

Abstract: An apparatus for corona treatment, the apparatus including a corona treatment unit with an inlet side and an outlet side, wherein the unit includes one or more sets of transverse electrodes, at least one electrode in each set being connected to a high voltage source and at least one second electrode connected electrically to ground, wherein the second electrode connected to ground includes a rotatable roller. The apparatus is a through-flow apparatus adapted for corona treatment of material in sheets, and including at least one conveying table with a transverse direction and a longitudinal direction, where the at least one conveying table includes mechanical conveyor means. By such a solution is achieved an apparatus through which sheets of material can be conveyed and corona-treated without holding the material and pulling it through the apparatus.

Abstract: A printing roller for a printing machine, e.g., for a flexographic printing machine, wherein the printing roller includes a rotary and longitudinal axis and an external surface, the external surface being substantially cylindrical and adapted for mounting a plate. The new feature of a printing roller according to the invention is that the external cylindrical surface includes at least one longitudinal groove, where the at least one longitudinal groove includes a geometry with one or more surfaces, the surface or surfaces lying within a circumscribed cylindrical surface for the external surface of the printing roller. In other words, this means that the longitudinal groove or grooves are cutouts in the form of milled or ground grooves in the external cylindrical surface itself on a printing roller.

Abstract: A coating unit is located after a sheet-fed digital printer on a manufacturing line. As a response to a workpiece entering the coating unit from the printer, coating substance is dosed onto a plate cylinder, and said plate cylinder is rotated to transfer said coating substance onto the workpiece, which is then transferred further on the manufacturing line. As a response to a first time limit expiring after transferring the workpiece further without a subsequent workpiece entering the coating unit, the rotation of the plate cylinder is stopped.

Abstract: An apparatus for corona treatment, the apparatus including a corona treatment unit with an inlet side and an outlet side, wherein the unit includes one or more sets of transverse electrodes, at least one electrode in each set being connected to a high voltage source and at least one second electrode connected electrically to ground, wherein the second electrode connected to ground includes a rotatable roller. The apparatus is a through-flow apparatus adapted for corona treatment of material in sheets, and including at least one conveying table with a transverse direction and a longitudinal direction, where the at least one conveying table includes mechanical conveyor means. By such a solution is achieved an apparatus through which sheets of material can be conveyed and corona-treated without holding the material and pulling it through the apparatus.

Abstract: A coating unit is located after a sheet-fed digital printer on a manufacturing line. As a response to a workpiece entering the coating unit from the printer, coating substance is dosed onto a plate cylinder, and said plate cylinder is rotated to transfer said coating substance onto the workpiece, which is then transferred further on the manufacturing line. As a response to a first time limit expiring after transferring the workpiece further without a subsequent workpiece entering the coating unit, the rotation of the plate cylinder is stopped.

Abstract: A printing roller for a printing machine, e.g., for a flexographic printing machine, wherein the printing roller includes a rotary and longitudinal axis and an external surface, the external surface being substantially cylindrical and adapted for mounting a plate. The new feature of a printing roller according to the invention is that the external cylindrical surface includes at least one longitudinal groove, where the at least one longitudinal groove includes a geometry with one or more surfaces, the surface or surfaces lying within a circumscribed cylindrical surface for the external surface of the printing roller. In other words, this means that the longitudinal groove or grooves are cutouts in the form of milled or ground grooves in the external cylindrical surface itself on a printing roller.

Abstract: A cleaning arrangement for a coater that has a plate cylinder, the cleaning arrangement having a cleaning web, a tangential moving mechanism configured to controllably move the cleaning web in at least one direction in a plane defined by the cleaning web, a radial moving mechanism configured to controllably move the cleaning web in at least one direction out of the plane, and a controller coupled to the tangential and radial moving mechanisms which is configured to control the moving of the cleaning web into and out of contact with the plate cylinder in conformity with input signals received by the controller.

Abstract: A packing (4) for sealing a doctor blade chamber (3), where the packing (4) includes a sharp rail (7) for sealing abutment against a screen roller. The rail (7) is embedded in a resilient member (20) having a sealing surface (12) for bearing against the bottom (3A) of the doctor blade chamber at the side of the member opposite the sharp rail (7), and where a wall (11) extends from the sharp rail (7) and to the sealing surface (12). The wall (11) extends curving from the rail (7) to the sealing surface (12). By such a design of a gradual transition is achieved that corners in which ink may accumulate and where partial solidification may occur are avoided. The sealing surface (12) is convexly curving for continuous contact with the bottom (3A) of the doctor blade chamber, even by deformation of the sealing surface (12) under pressing action (9).

Abstract: The invention relates to a method of manufacturing a product having a sub-micron primary particle such as metal oxide, metal oxidhydroxide or metal hydroxide product, said method comprising the steps of: introducing a solid reactor filling material in a reactor, introducing a metal-containing precursor in said reactor, introducing a co-solvent into the said reactor, introducing a supercritical solvent in the said reactor. By these steps a contact between the metal-containing precursor and the co-solvent is established, thus resulting in the formation of said product in the proximity of the said solid reactor filling material. The present invention offers the astonishing possibility of producing anatase phase of TiO2 at temperatures as low as between 50° C. and 100° C. and at concurrent pressures of 100-200 bar. The invention also relates to a product such as anatase TiO2 produced by the method and also relates to an apparatus utilising the method.

Abstract: The present invention concerns a method for preparing materials containing binder systems derived from amorphous silica and bases as well as the materials prepared by the method. Relative to known methods, the present invention allows for a continuous production of material as the two components of the binder are brought onto into contact where the binder system is to be applied. The product achieved by the invention has a broad range of applications, such as for construction materials, insulating materials, fire proof materials, reinforcement materials etc. The present invention also relates to a method for preparing materials containing binder systems derived from amorphous inorganic material and bases as well as the materials prepared by the method.

Abstract: There is described a method and a system for cleaning an ink chamber (1) of a printing unit. The system includes a storage tank (10) which via a high-pressure pump (9) is connected with a hydrophore (2). In the hydrophore a high pressure is built up, and the hydrophore is connected with cleaning nozzles (40) via a valve (5). Thus it becomes possible to inject a shot of cleaning liquid into the chamber by switching the valves (5). The cleaning nozzles are preferably designed as a mushroom-shaped plug (40) with a stem (41) which is mounted in the chamber wall and which has a circular domed top (43) of elastic, resilient material. When injecting cleaning liquid, the elastic plug will spray cleaning liquid out into the chamber, and after shutting off the pressure, there will be a self-closing effect.

Abstract: There is described a printing unit and a method for printing with flexographic inks. The printing unit includes a screen roller engaging a doctor blade system (3), and which is in continuous operation, either by engaging a motor (10) or by operation by the transmission (2) of the printing machine. The screen roller (1) of the printing unit interacts with a rubber sheet (16) which is disposed on a rubber sheet cylinder (4) at a position between a printing plate cylinder (5) and a back-pressure cylinder (6). A slot (7) is provided in the rubber sheet, used when the screen roller (1) is to be engaged with the rubber sheet (17).

Abstract: The invention relates to an improved method of manufacturing a compound having a sub-micron primary particle size such as a metal compound such as metal oxides, metaloxy hydroxides metal hydroxides, metal carbides, metal nitrides, metal carbonitrides, metal borides, electroceramics and other such compound, said method comprising the steps of: introducing a solid reactor filling material in a reactor, introducing a metal-containing precursor, a semi-metal-containing precursor, a metal-containing oxide or a semi-metal-containing oxide in said reactor, introducing a reactant or a substitution source into the said reactor, and introducing a supercritical solvent into the said reactor. These steps result in the formation of said compound in the proximity of the said solid reactor filling material.

Abstract: There is described a method and a system for cleaning an ink chamber (1) of a printing unit. The system includes a storage tank (10) which via a high-pressure pump (9) is connected with a hydrophore (2). In the hydrophore a high pressure is built up, and the hydrophore is connected with cleaning nozzles (40) via a valve (5). Thus it becomes possible to inject a shot of cleaning liquid into the chamber by switching the valves (5). The cleaning nozzles are preferably designed as a mushroom-shaped plug (40) with a stem (41) which is mounted in the chamber wall and which has a circular domed top (43) of elastic, resilient material. When injecting cleaning liquid, the elastic plug will spray cleaning liquid out into the chamber, and after shutting off the pressure, there will be a self-closing effect.

Abstract: The invention describes a sheet offset machine in which may be applied an air-drying ink/varnish. The invention furthermore concerns a drying unit that may be used for drying air-drying ink/varnish. The drying unit is disposed in connection with a cylinder surface and includes an integrated ventilator with suction and exhaust duct. These are used for sucking in fresh air and for exhausting used air having swept a wet print on the print carrier. The ventilator is connected to nozzles having an elongated nozzle orifice oriented in parallel with the center axis of the cylinder surface. The nozzle orifice is provided immediately opposite the cylinder surface for blowing an air stream towards counter pressure on the print carrier while it is disposed on the cylinder surface. By using such a system is achieved an efficient and energy economical drying of the applied inks/varnishes.

Abstract: There is described a printing unit and a method for printing with flexographic inks. The printing unit includes a screen roller engaging a doctor blade system (3), and which is in continuous operation, either by engaging a motor (10) or by operation by the transmission (2) of the printing machine. The screen roller (1) of the printing unit interacts with a rubber sheet (16) which is disposed on a rubber sheet cylinder (4) at a position between a printing plate cylinder (5) and a back-pressure cylinder (6). A slot (7) is provided in the rubber sheet, used when the screen roller (1) is to be engaged with the rubber sheet (17).

Abstract: A doctor blade system with clamping device is provided for clamping a doctor blade, for example, in a doctor blade chamber without using screws and without having to use tools. A clamping mechanism, preferably pneumatic, counteracts the clamping by actuation. By disposing a sectional rail between the clamping rail and the doctor beam, the sectional rail drawing the clamping rail and the beam together with a spring mechanism, the doctor blade is clamped between the clamping rail and the beam. In another embodiment, the clamping rail is designed as an angular section tipping about an edge.