Abstract: A dosing device for powder has an inlet and an outlet for powder. A dosing disc rotatable from inlet to outlet has a dosing area of sintered material, which is provided with cavities for the volumetric dosing of the powder. A dosing body having open dosing cavities is provided which is movable from the inlet and outlet. By changing the speed of rotation of the dosing disc the quantity of powder to be discharged can be set in a wide range.

Abstract: A flat UV light source has a tight packing of UV light-emitting diodes (56) that are arranged in a matrix. These light-emitting diodes are cooled by cooling air flows (66) or by cooling water flows.

Abstract: A feed device for conveying a powdery medium from a powder container into a powder conduit is specified and has a powder channel which connects the powder container and the powder conduit. The powder channel also, in a working position, is arranged with a vertical component of the axis of the powder channel above a charge end of the powder conduit. The powder channel has a joint unit with a charge joint part, to which the powder container is connected detachably in a sealed manner, and a delivery joint part for connecting the powder channel in a sealed manner to the charge end of the powder conduit. Displacement travel of the joint unit is sufficiently large for a filling level of the powder container to be located below an opening of the powder container in a lowered exchange position.

Abstract: A flat UV light source has a tight packing of UV light-emitting diodes (56) that are arranged in a matrix. These light-emitting diodes are cooled by cooling air flows (66) or by cooling water flows.

Abstract: A dosing device for powder has an inlet and an outlet for powder. A dosing disc rotatable from inlet to outlet has a dosing area of sintered material, which is provided with cavities for the volumetric dosing of the powder.

Abstract: A powdering unit for spraying printed products with powder has two box-shaped guiding elements following each other in the product-conveying direction. These guiding elements delimit, with mutually opposite parallel guiding sides, a guiding shaft leading to the product-conveying plane and intended for a powder gas curtain and delimit, with guiding sides running substantially parallel to the product-conveying surface, together with one side of the product, a powder gas guiding shaft running parallel to the product surface.

Abstract: A powdering unit for spraying printed products with powder has two box-shaped guiding elements following each other in the product-conveying direction. These guiding elements delimit, with mutually opposite parallel guiding sides, a guiding shaft leading to the product-conveying plane and intended for a powder gas curtain and delimit, with guiding sides running substantially parallel to the product-conveying surface, together with one side of the product, a powder gas guiding shaft running parallel to the product surface.

Abstract: A drier unit (10) for drying printed products has a plurality of drier rails (12), which comprise in each case a supporting body (14) manufactured from a hollow section (16). The clear outer contour of the cross-sectional area of the supporting bodies (14) is a rectangle. The drier rails (12) have in each case two resistance heating units (60) and additionally carry an infrared radiator (164).

Abstract: A powder supply system (10) is used to supply at least one device (12) for dispensing powder, in particular a device for dusting printed materials. The powder supply system (10) has an intermediate powder supply container (40). This is connected to the powder dispensing device (12) via a powder feed device (70, 126, 128). An automatic supply of powder to the at least one powder dispensing device (12) is guaranteed by the powder supply system (10).

Abstract: A dryer unit intended especially for drying printed products, has a frame in which two sides of the frame are formed by portions of profile material of the kind used also for the manufacture of rail main bodies of heating rails.

Abstract: A radiant-heat drier for printing presses or the like has a plurality of spaced radiant-heat drier strips (22) which extend transversely with respect to the conveyance direction and which each have in turn a radiator bar (44) and a cooling air distributor element (24) extending parallel thereto at a distance. On a wall (30) facing the radiator bar (44), the radiator bar has a plurality of air delivery nozzles (32, 34) which terminate in the immediate vicinity of the rear of the radiator element (44).

Abstract: A device for dusting flat products such as printed matter with a powder includes a powder box open toward a product transport surface on which a plurality of the products which are to be dusted are moved. The powder box has a powder nozzle arrangement including a first plurality of compressed air/powder delivering nozzles arranged transversely to a product transport direction at an upstream edge of the powder box, and a second similar nozzle arrangement at a downstream edge of the powder box, the two nozzle arrangements cooperating to product an air current directed towards the product transport surface. First and second suction nozzle arrangements are also similarly provided, respectively downstream of the first air nozzle arrangement and the second air nozzle arrangement, both suction nozzle arrangements also being oriented transversely to the product transport surface.

Abstract: A powder dusting apparatus for dusting printed products with fine powder has a plurality of nozzle bodies (42) arranged in parallel one beside the other, which emit the powder mist. The spacing of the nozzle bodies (42) can be adjusted by a thread drive (26, 66) and a lazy tongs arrangement (52).

Abstract: A drying element for use in a printer, with an electrical heating device through which blown air flows and with a blower duct which distributes the warm blown air transversely to the conveying direction of the printed products, wherein a rod-shaped infra-red radiator extends parallel to the surface of a heating tube located upstream of the blower duct and has a surface absorbing infra-red radiation, said blower duct extending parallel to the heating tube and being connected to the latter by way of a 180.degree. -bend.

Abstract: An apparatus for generating a very thin mist of powder with a device for measuring the flow of powder from a supply container and controlling the flow of the powder to an atomization chamber, which includes a device for periodically diverting the flow of the powder past the measuring device so as to determine the effects of aging and impurities on the measuring device and to compensate the measuring device for such effects.