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 invention concerns a device for covering printed sheets with powder having a reservoir for the powder, an inlet for a carrier air stream feeding into the reservoir, an outlet for the carrier air stream loaded with powder exiting out of the reservoir and with a heating cartridge disposed in the reservoir, wherein the heating cartridge is provided with a heat conducting device. Powder can thereby be heated in a controlled, simple, and effective manner to remain in a pourable condition.

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.

Abstract: An apparatus for metering dusting powder comprises a powder supply container, a stirring mechanism arranged in the supply container, a powder outlet opening at the bottom of the supply container, and an oscillating plate for metered delivery of the powder, which is provided at the outlet opening and to which an oscillatory motion is imparted by means of a shaking device. The stirring mechanism comprises a stirring blade rotating immediately above the bottom and the outlet opening of the supply container, and the oscillating plate of the shaking device executes an inharmonic oscillation consisting of a slow motion to and a quick motion fro.

Abstract: A process for the continuous measurement of the density of a liquid by means of an aerometer body swimming in the liquid is characterized by the feature that the liquid is allowed to flow periodically at an increased flow rate past the aerometer body in order to clean the same of foreign matter, gas bubbles or the like disturbing the measuring, with the measuring procedure being interrupted during this cleaning period. In an apparatus for performing this process, an aerometer body is surrounded in a measuring vessel by a partition wall at a small distance therefrom, and line is provided, through which liquid to be measured may be introduced at a relatively high flow rate into the space between the aerometer body and the partition wall in order to periodically clean the aerometer body.

Abstract: The invention relates to a device for the powder-dusting of moving objects, particularly flat substrates in the form of webs and sheets of paper, plastic or textile with a nozzle housing made of electrically insulating material, with at least one nozzle provided on the housing for releasing a powder air stream laden with dusting powder and with metallic electrodes and counter-electrodes disposed on the housing for producing an electrical high-voltage field. To obtain a powder air stream with powder particles as neutral as possible, it is envisaged that at least one electrode and a counter-electrode cooperating with the latter are disposed on the outside of the housing in the vicinity of the nozzle whereby an electrical high AC voltage is applied to the electrode and counter-electrode, whereby, after being released from the nozzle, the powder air stream penetrates the thus produced high AC voltage field on the outside of the housing.

Abstract: A device for the electrostatic application of particles entrained in a stream of gas to a non-conductive, flat substrate, typically a web or sheets of paper. The particles are electrically neutral in the stream. A charging electrode is located below the substrate in the area where the gas stream impinges on the substrate. The substrate is advancing lengthwise, and a counterelectrode is located below the substrate in the direction of advance from the charging electrode. Preferably the direction and velocity of the gas stream near the substrate and direction and velocity of the substrate itself are approximately equal. Also in the preferred form, a grounded collecting pan is located beneath the electrodes.