Abstract: In a digital printer, print groups are provided each having a respective developer station using liquid developer comprising carrier fluid and toner. A supply arrangement to supply the print groups is provided with fluids and to accept used and unconsumed fluids from the print groups. The supply arrangement has a first supply unit common to all print groups to supply the print groups with the fluids, at least one reservoir containing a carrier fluid. A second supply unit per color supplies the respective print group for the color with liquid developer. The second supply unit comprises a first buffer container connected with a reservoir, the reservoir containing carrier fluid and concentrated toner as toner concentrate. A second buffer container for carrier fluid is connected with the carrier fluid reservoir in the first supply unit.

Abstract: In a digital printer, print groups are provided each having a respective developer station using liquid developer comprising carrier fluid and toner. A supply arrangement to supply the print groups is provided with fluids and to accept used and unconsumed fluids from the print groups. The supply arrangement has a first supply unit common to all print groups to supply the print groups with the fluids, at least one reservoir containing a carrier fluid. A second supply unit per color supplies the respective print group for the color with liquid developer. The second supply unit comprises a first buffer container connected with a reservoir, the reservoir containing carrier fluid and concentrated toner as toner concentrate. A second buffer container for carrier fluid is connected with the carrier fluid reservoir in the first supply unit.

Abstract: An electrographic printer using a print web medium is provided with a web adjusting apparatus having a geared motor for adjusting the web position. A method and apparatus to compensate for backlash in the geared motor includes a sensor to detect an end position of rotation of the geared motor. A time being determined from a point of reversal of the geared motor to a decay in the sensor output indicating a gear backlash, and the time being added to the drive of the geared motor when reversing directions to adjust the web position.

Abstract: In a method for operating a printing line comprising a first printer that prints print images on a continuous first web, and at least one second printer that prints print images on a continuous second web, the webs are post-processed with at least one post-processing system. With a web storage unit, the webs printed by at least one of the printers are buffered, the web storage unit being arranged between the printers and the post-processing system. With the post-processing system, the at least one printed web stored in the web storage unit has access.

Abstract: An electrographic printer using a print web medium is provided with a web adjusting apparatus having a geared motor for adjusting the web position. A method and apparatus to compensate for backlash in the geared motor includes a sensor to detect an end position of rotation of the geared motor. A time being determined from a point of reversal of the geared motor to a decay in the sensor output indicating a gear backlash, and the time being added to the drive of the geared motor when reversing directions to adjust the web position.

Abstract: To be able to insert bands of an arbitrary length into a machine unit, for example intermediate carrier bands given an electrophotographic printer device, the band is seated on tubes. The tubes are pushed into receptacles arranged in the machine unit. The band can then be slipped over the transport and guide drums arranged in the machine unit. Subsequently, the band is tensed and the tubes are pulled from the receptacles.

Abstract: A method and apparatus for controlling a lateral position of a band-shaped intermediate image carrier in an electrographic apparatus by regularly detecting a mark on the intermediate image carrier with a sensor. The band-shaped intermediate image carrier is moved in a transport direction from an image generating position at which an image is generated on the image carrier to a transfer position at which the image is transferred. A transverse position of the intermediate image carrier relative to the transport direction is detected and is time correlated with the regular detection of the mark. Intermediate position detections are carried out between the regular detections of the mark in a time-controlled manner. The detected positions are compared to stored position values or calculated theoretical position values and the results of the comparison is used to control position correction devices which change the transverse position of the intermediate image carrier.

Abstract: To be able to insert bands of an arbitrary length into a machine unit, for example intermediate carrier bands given an electrophotographic printer device, the band is seated on tubes. The tubes are pushed into receptacles arranged in the machine unit. The band can then be slipped over the transport and guide drums arranged in the machine unit. Subsequently, the band is tensed and the tubes are pulled from the receptacles.

Abstract: A printer or copier and method generates toner images for transfer onto a recording medium. A latent charge image is generated on a photoconductor and is developed by the application of toner by at least one developer station to generate the toner image for transfer to the recording medium. A plurality of the developer stations are provided along the photoconductor to develop the images in color using a color separation method. A transfer band collects the color separations on top of one another to generate the overall toner image which is transferred to the recording medium. Multiple modules, each with developer stations, a photoconductor and a transfer band may be provided for one sided or two sided printing.

Abstract: A turn-over apparatus for a printer for printing on both sides of a web-shaped recording medium has two acutely angled deflectors to turn the recording medium over. The angles of the deflectors are such that the converging ends of the deflectors are spaced apart. Automatic threading of the recording medium is provided.

Abstract: A turnover device is provided having a W-shaped arrangement of hollow rod-like deflector rods and reverser rods with an automatic threading device. The turnover device receives continuous paper in an admission slot, self-threads the paper therethrough, and returns the paper through a discharge slot in a flipped-over manner for use with a multi-functional, electrographic printer device for printing a web-shaped recording medium in simplex and duplex printing. The rods are preferably hollow with air holes to provide an air cushion between the rod and paper. Guide channels are also preferably disposed over each rod to guide the paper thereover.

Abstract: A printing or copying machine has a photoconductor (10) with associated recording and developing station (EY, EM, EC, EB) for producing single-color or multi-color toner images on the intermediate image-carrier (10). The toner images are transferred electrostatically, in a transfer zone (T) onto a belt-type transfer element (16) and then, in transfer and fusing zones (U1, U2), printed from the underneath from the transfer element onto the recording carriers (24). In order to facilitate the fusing of the transfer image in the transfer and fusing stations (U1, U2), heating units (23, 31) for heating the toner images on the transfer element (16) and/or for heating the recording carrier (24) are provided. Between the first and the second transfer and fusing station (U1, U2), a turning station (W) is arranged. The printing or copying machine can be operated in the simplex and duplex printing mode of operation to produce single-color or multi-color copies.