Abstract: A rotary sprayer (10) for fluids (14), has a rotating disc (22), a drive (58) for the disc (22), and a supply device (28) for the application of fluid (14) onto the disc (22). The disc (22) has a distribution plane (30) for the fluid (14), and at least one opening (34) is provided in the distribution plane (30), via which a secondary flow (50) of the fluid (14) is separated from the main flow (48) to another plane (46). The disc (22) has a first spray edge (44) for spraying the working flow (52) of the fluid (14) and a second spray edge (54) for spraying the secondary flow (50) of the fluid (14). Since the main flow is divided into a secondary flow and a working flow, the effective amount of fluid that is used to moisten the workpiece can be reduced without having to therefore reduce the amount of fluid that is supplied e.g. via the pipe conduit. The formation of drops is thereby reliably prevented and a pipe conduit is used that has a cross-section of adequate size to prevent clogging.

Abstract: The invention concerns a spray nozzle for a powder duster for dusting freshly printed products with a connection for a tube for supplying a powder-air mixture, a distribution chamber and at least two nozzle channels which branch off from the distribution chamber like a fan, wherein the opening angle of the outer nozzle channels limiting the fan subtends an angular range of 5° to 20°, in particular an angular range of 8° to 15°, and preferably 12°. The invention also concerns a spray bar with spray nozzles of this type, a powder duster comprising spray nozzles of this type, and a method for dusting freshly printed products.

Abstract: The invention relates to a device for generating a homogeneous powder-air mixture comprising a pressure section and a suction section, wherein the two sections merge in an outlet, wherein the pressure section terminates in an orthogonal direction in the suction section in an ejector-like manner, the suction section being open towards the surroundings. The invention also relates to a method for generating a homogeneous powder-air mixture.

Abstract: A rotary sprayer (10) for fluids (14), has a rotating disc (22), a drive (58) for the disc (22), and a supply device (28) for the application of fluid (14) onto the disc (22). The disc (22) has a distribution plane (30) for the fluid (14), and at least one opening (34) is provided in the distribution plane (30), via which a secondary flow (50) of the fluid (14) is separated from the main flow (48) to another plane (46). The disc (22) has a first spray edge (44) for spraying the working flow (52) of the fluid (14) and a second spray edge (54) for spraying the secondary flow (50) of the fluid (14). Since the main flow is divided into a secondary flow and a working flow, the effective amount of fluid that is used to moisten the workpiece can be reduced without having to therefore reduce the amount of fluid that is supplied e.g. via the pipe conduit. The formation of drops is thereby reliably prevented and a pipe conduit is used that has a cross-section of adequate size to prevent clogging.

Abstract: The invention concerns a spray nozzle for a powder duster for dusting freshly printed products with a connection for a tube for supplying a powder-air mixture, a distribution chamber and at least two nozzle channels which branch off from the distribution chamber like a fan, wherein the opening angle of the outer nozzle channels limiting the fan subtends an angular range of 5° to 20°, in particular an angular range of 8° to 15°, and preferably 12°. The invention also concerns a spray bar with spray nozzles of this type, a powder duster comprising spray nozzles of this type, and a method for dusting freshly printed products.

Abstract: The invention relates to a liquid coating device (10) comprising a rotor housing (12) accommodating one or more spray rotors (22). The spray rotors (22) comprise a drive device (46), a drive shaft (42), a bearing element (50) and a spray disk (38). The spray disk (38) is arranged above the bearing element (50). According to the invention, maintenance and lifespan of the liquid coating device (10) are improved significantly.

Abstract: The invention relates to a device for powdering printed sheets, especially printed sheets made out of paper, whereby a powder coating device is arranged inside a sheet feeding device and an electrostatic charging device that is disposed outside the sheet feeding device is assigned to the sheet.

Abstract: A method and device for powdering the printed sheets of paper. Powder is periodically introduced into the airflow by a dosing element.

Abstract: The invention relates to a method and a device for powdering printed paper sheets. According to the invention, the performance of the air-pressure generator which generates the air stream for the powder-air mixture can be adjusted in line with the machine speed or the speed of transportation of the paper sheets.

Abstract: The present invention relates to a device and method for dusting smooth or sheet-like products, comprising at least one duster for spraying an air/powder mixture on said products. In order to ensure efficient dusting with no dirt accumulation in the printer or the surrounding area, it is suggested that part of the powder particles be magnetized and means be provided for creating a magnetic field in the powder deposit area so that said powder particles are subjected to a force drawing them towards the product.

Abstract: The invention concerns a method and a device for applying powder on sections of printing sheets (2). The invention includes a powder airflow (8) enclosed in a protective airflow (13) such that the powder airflow is steady and protected against the action of possible disturbances until it reaches the sections of printing sheets (2).

Abstract: The present invention relates to a device for moistening a web-shaped material, wherein the moistening device is designed as a device for mobile use, and wherein the web-shaped material can be laterally pushed into the moistening device.

Abstract: A device for powder, wherein a powder container, an intermediate container and a dosing element are successively arranged in a versicle container. The powder is conveyed from the powder container into the intermediate container and, subsequently, into the dosing element. This results in a regular discharge.

Abstract: The present invention relates to a device for generating a powder-air mixture, having a powder delivery device, a conveying air feed pipe for the conveying air, and a device for forming an enveloping conveying air jet. The powder delivery device terminates in the conveying air feed pipe and therefore in the enveloping air jet.

Abstract: A powder device comprises a powder container which is formed as an exchangeable container mounted on a container receptacle via a quick-connect means. The inside of the powder container has a dome which extends from the output flow opening into the inside of the powder container. This loosens up the powder and prevents it from adhering to surfaces.

Abstract: The present invention relates to a device for metering a powder, having a device for the delivery of powder, a axially symmetrical metering element arranged underneath the delivery device, and a drive for the axially symmetrical metering element, wherein the axially metering symmetrical element has a surface profile extending in the circumferential direction, and is adapted in its configuration so that the powder is not compressed during movement about the axially symmetrical metering element.

Abstract: The present invention relates to a device for dusting moving printed sheets, having a reservoir body for powder, an inlet for a carrier air flow terminating in the reservoir body and an outlet from the reservoir body for the carrier air flow loaded with powder, wherein the reservoir body is at least in sections divided into a delivery chamber and a storage chamber by means of a separating wall, and the inlet and the outlet communicate with the delivery chamber, and the storage chamber is used for filling the delivery chamber.

Abstract: A method for monitoring the amount of moisture sprayed on a moving material web or a roller across their width, with the width being divided into individual measurement areas includes a measuring step, a storing step and further measuring steps. The measurement is made of local droplet flow of the sprayed liquid in the individual measurement areas, storing the measured values as set values, and again measuring the local droplet flow and comprising it to the set values. The device used includes a counting device and an evaluation unit. The counting device registers droplets of the liquid sprayed on the moving material web in a respective one of the individual measurement areas, and generates a signal per registered droplet which is supplied to the evaluation unit.

Abstract: A process and device are disclosed for moistening a moving web of material (10), in particular for moistening again a printed then dried printed material. As soon as possible after the thermal drying process is concluded, preferably in the area of the cooling cylinders, a moistening agent is pressed on one or both sides of the web of material (10) by an applicator (12) by means of a smooth cylinder (15), against a guiding element (11).

Abstract: An installation for the thermal drying of strips, sheets, etc., which are conveyed along a path over guide elements past dryer unit in a drying device. The installation has a cooling unit whose coolant is fed through suitable coolant lines to the guide elements in the drying zone and to the dryer units, from where the coolant is fed to a heat exchanger. The installation also has an air extractor to extract the air from the drying zone. In order to provide a space saving installation, the heat exchanger in the cooling unit is located in the vicinity of the air-extraction aperture of the air extractor, adjacent to the drying zone.