Abstract:
The invention relates to a method and a heating device for heating at least one printing agent on a printing material (4), which is passed along a transport path through said heating device, comprising at least one microwave applicator (2) and at least one microwave absorber element in the outer perimeter of said microwave applicator. The object of the present invention is to reduce the loss of energy due to microwave radiation exiting from the microwave applicator (2). The object of the invention is achieved in that the minimum of one microwave absorber element is an irradiation device that absorbs microwave radiation and emits electromagnetic radiation, in which case said irradiation device, in accordance with the method herein, is energized by microwave radiation, applies radiation to the printing agent and/or the printing material (4), and thus at least aids the heating process.
Abstract:
Treating a transport mechanism (5) for transporting print material (2) in a printing press (1) that uses toner in which oil-bearing substances (27) adhere to the transport mechanism (5). A cleaning device (30) is provided with at least one cleaning element (33) movable relative to the surface of the transport mechanism (5) for application of at least one oil-repelling substance (37) that reduces the adherence of the oil-bearing substances (27) to the transport mechanism (5). Accordingly, this cleaning element (33) can strip the surface of the transport mechanism (5) of oil-bearing substances (27).
Abstract:
The invention relates to a process for coating a board- or paper-like substrate with a powder paint composition. The powder paint particles are first charged by friction or induction in the presence of magnetic or non-magnetic particles, are next transported and are then applied to the substrate or applied to a transfer medium and subsequently transferred to the substrate, by means of an electric field between the substrate respectively the transfer medium and the means of transport whereafter the powder paint composition is cured or fused to obtain a powder coating and wherein the powder paint particles are based on solid particles of a radiation curable binder. Preferably, the substrate is paper or cardboard.
Abstract:
Adjusting a gloss for a print image by adjusting the speed of cooling of the print image. Further, a toner for a printing press adjusting gloss by adjusting cooling includes 1% to 30% aliphatic hydrocarbons, aliphatic acids, aliphatic alcohols or their salts, or olefinic hydrocarbons.
Abstract:
At least one physical characteristic of a printed format on a printing medium and/or at least one physical characteristic of the printing medium is improved. At least one essentially colorless toner containing at least one substance that affects at least one physical characteristic, is applied to the printing medium and/or the printed format.
Abstract:
The invention relates to a two-constituent developer which comprises toner and carrier particles, said toner particles having one or a plurality of binding agent(s), a chromophoric constituent and conductivity-providing additives. Said developer is characterised in that the toner particles have as additives in the developer a charge-boosting, conductivity-providing, quaternary ammonium salt with a melting point of below 150 DEG C and a charge-controlling, conductivity-providing antistatic agent with a melting point of below 150 DEG C. The combination of the quaternary ammonium salt with the antistatic agent in the toner produces good, uniform image quality even when the electrophotographic device has different operating conditions.
Abstract:
A developing device for transferring toner particles to a photoconductor comprises a container for holding a developer of non-magnetic toner particles and hard magnetic carrier particles, a first developer roller which is at least partially arranged in said container and features a non-magnetic jacket tube and a magnetic core, the jacket tube and the magnetic core each being arranged so as to be rotatable about corresponding rotational axes, and at least a second developer roller which is arranged adjacent to the first developer roller in such a manner that carrier particles with toner particles adhering to them and being carried along by rotation of the first developer roller, contact the second developer roller in order to transfer the toner particles in a contacting manner to the second developer roller, said second developer roller being supported so as to be rotatable about a corresponding rotational axis. There are provided at least one drive unit for rotating the jacket tube, the magnetic core and the second developer roller, each about its respective rotational axis, as well as means for generating an alternating voltage field adjacent to the second developer roller in the region of an adjacent photoconductor. In a method for generating a toner image on a photoconductor, a charge image is first formed on the photoconductor and, subsequently, toner is applied, correspondingly to the charge image, to the photoconductor by way of a developing device. When the toner is being applied, the toner particles are triboelectrically charged in a developer of non-magnetic toner particles and hard magnetic carrier particles, the carrier particles with toner particles adhering to them are brought into contact with and transported by a first developer roller comprising a rotating non-magnetic jacket tube and a magnetic core rotating inside said jacket tube, the toner particles are transferred to a second developer roller arranged adjacent to the first developer roller and rotated in such a manner that carrier particles with the toner particles adhering to them contact the second developer roller, the photoconductor is moved at a prespecified distance along the rotating second developer roller, an alternating voltage field is generated in the region between the second developer roller and the photoconductor in order to generate via this means a cloud of toner particles in this region, and the toner particles are attracted to the photoconductor corresponding to the charge image.
Abstract:
The invention relates to a method and a device that permit the production of an optionally multi-colored film in a simple and cost-effective manner. In this method for the production of a film, toner is first applied to a transport belt with the use of at least one printing unit in such a manner that an essentially uninterrupted toner layer is formed on the transport belt. The toner on the transport belt is then heated with at least one first heat source to a temperature above a melting point of the toner and is subsequently cooled to below the melting point of the toner. Finally, the toner is removed from the transport belt as a cohesive material layer. The device comprises a transport belt, at least one printing unit arranged for applying a toner to the transport belt, and at least one heat source. Viewed in a direction of movement of the transport belt, the heat source is arranged downstream of the at least one printing unit in such a manner that said heat source is able to heat the toner present on the transport belt and that said heat source is suitable to heat the toner to a tem¬ perature above a melting point of said toner.
Abstract:
A microwave fuser apparatus, for a reproduction apparatus, the microwave fuser apparatus having at least two microwave applicators (10a, 10b), staggered relative to a recexver member transport path (A) with an area of overlap (14), for applying microwave energy to a receiver member traveling on such transport path (R) relative to the microwave applicators (10a, 10b) to have toner images fused thereto. The microwave fuser apparatus has at least one additional microwave applicator (16a, 16b), located adjacent to the overlapping area (14) between the at least two staggered microwave applicators (10a, 10b) that applies microwave energy to the receiver member. The at least one additional microwave applicator (16a, 16b) effectively maintains an elevated temperature of a receiver member.
Abstract:
A fuser mechanism (1) and a fuser device (2) that is at least partially externally heated for fusing toner, on a printing medium (3), incorporating a microwave heating mechanism (9) for contact-free heating of the surface of the fuser device. In addition, a fuser device (2) that incorporates a surface layer that absorbs microwaves.