摘要:
An electrophotographic printing device including a toner-developer unit, a lighting device, a developer drum, a photoconductor, a transfer unit and an earthed charging device. The substrate to be printed is placed on a transport device and moved along the transfer unit and the toner image of the transfer unit is transmitted to the substrate. A clear, sharp and shadow-free printed image is obtained by arranging the substrate on a non-earthed, electrically conductive layer which is insulated relative to the earthed transport device by an insulator extending along the charging device that is located above the substrate and the measurement of substrate that is to be printed and that is oriented in the direction of transport. The charging device can be charged at a potential, exciting voltage UF, of between 1 to 10 kV, more particularly 1.5 to 4 kV.
摘要:
A developer unit having a toner reservoir and a toner application device. The toner application device applies toner to a developer and the developer can be brought into a planar contact with an OPC (photo conductor drum). In order to improve the transfer of toner in the contact area between the OPC and the developer, the developer has a developer strip that is placed, in the contact area, in some areas of the surface of the OPC.
摘要:
A method for heating and fixing an inking, particularly a toner powder on a plate-shaped support, and the inking applied to the coated upper side of the support is fixed on the support by heat action. This invention is to be able to fix and adhere well toner inkings on thick-walled supports. Thus, the coated upper side and/or the uncoated underside of the plate-shaped support is subjected to infrared radiation and/or a hot air stream and/or a microwave radiation. A support having a high weight per unit area is used, which permits a portion of the infrared radiation and/or the hot air stream and/or the microwave radiation directed onto the uncoated underside of the support to pass through while absorbing another portion of the same.
摘要:
A printing machine with an electrophotographic device, having a photoconductor, a photoconductor drive and an illumination device. The electrophotographic unit can be provided with the substrate by a feed device. The photoconductor drive motor is adjusted by a controller and the feed device can be linearly adjusted by a feed device drive motor. In order to produce high-definition prints, especially images or lettering on plate-shaped substrates, the feed device drive motor is adjusted by a controller that is controlled by a master-slave controller via a setpoint feed. The controller for the photoconductor drive motor is also controlled by the master-slave controller via a setpoint feed and the master slave controller synchronizes the feeding speed of the feed device and the speed of movement of the photoconductor.
摘要:
A non-magnetic, ceramic one-component toner which is transferred onto a glass, glass ceramics or ceramics substrate or a similar solid or flexible substrate by electrophotographic printing and is burnt into in a subsequent temperature process. The one-component toner includes a synthetic matrix and a portion of substantially inorganic foreign matter. The portion of foreign matter includes exclusively non-magnetic particles and amounts to 40 to 70% by weight, especially 50 to 60% by weight, with the specific charge of the toner particles in a range of >25 μCk/g.
摘要:
A method for heating and fixing an inking, particularly a toner powder on a plate-shaped support. Heat is applied and fixes the inking to a coated upper side of the support. The method of this invention can be used to fix and adhere toner inkings on thick-walled supports. In one method step of this invention, the coated upper side and/or an uncoated underside of the plate-shaped support each is subjected to infrared radiation and/or a hot air stream and/or a microwave radiation. At least a portion of the infrared radiation and/or the hot air stream and/or the microwave radiation directed onto the uncoated underside of the support passes through while another portion is absorbed, such as if the support has a high weight per unit area of the support. A ceramic or thermosetting toner forms the applied ink.
摘要:
A printing device, including at least one electrophotographic printing unit with a transfer medium for the transfer of a toner powder to a substrate in a transfer zone. One or several substrates may be run through the transfer zone by a transport system. The transport system includes a heated housing device for each substrate, having one or several heating elements for the introduction of heat energy into the substrate. A cooling device is provided for the transfer medium of each printing unit, which extracts heat energy from the transfer medium. There can be a number of serially arranged printing units, for the printing of each substrate, each with a different color.
摘要:
An electrophotographic printing device of modular construction with a support device, including a transport device, upon which a substrate may be transported between a start position and a target position and one or several electrophotographic units arranged on the support device, between the start and target position, having a developer unit, a photoconductor and an illumination unit for the photoconductor. The support device includes two or more housing positions arranged one behind the other in the transport direction of the transport device, provided with unitary mechanical interfaces. The electrophotographic units include unitary fixing pieces which are complementary in form to the interfaces. Such a printing device may be flexibly laid out due to the technical assembly thereof and may be individually set-up easily for specific printing jobs.
摘要:
A multicolor printing system with a plurality of toner printing stations which apply differently colored toner images to at least one side of a transfer medium, from where the toner images can be transferred to a print medium which can be contacted with the transfer medium. If an endless transfer belt is used as the transfer medium, with a running direction extending at an angle with respect to the transport direction of the print medium, the toner printing stations embodied as modular units are arranged at exteriors of two sides of the endless transfer belt and are matched to the opposing running directions of the sides with the toner image transfer, and the multicolor toner image of the endless transfer belt can be transferred directly or via a transfer roller to the print medium which is conducted at the same speed as the endless transfer belt, then it is possible with small structural dimensions to arrange a plurality of toner printing stations in an easily accessible manner at the endless transport belt and to control them so that a congruent composition of the multi-color toner image and its unequivocal transfer to the print medium occurs.
摘要:
An electrophotographic printing device with a developer unit and a photoconductor. The photoconductor is either directly connected to a substrate to be printed in the region of a transfer zone, or is connected by an intermediate circuit of one or several transfer media. At least one charger is provided for the substrate and the substrate may be transported through the transfer zone by a transport device. According to this invention, an effective transfer of toner to the substrate surface can be achieved with such an arrangement, even with a poor electrically-conducting and thick-walled, sheet-like substrate, whereby a charger is arranged as the primary charger in the transport direction and a secondary charger is arranged in the region after the transfer zone and both primary and secondary chargers affect the surface of the substrate to be printed.