Abstract: A dryer system is described that is configured to purify, by means of a wet scrubber, the exhaust gases created in the drying of a recording medium that has been printed to. Moreover, thermal energy may be extracted from the exhaust gases in the wet scrubber, which thermal energy is used in turn to dry the recording medium. An environmentally safe and energy-efficient drying may thus be enabled.

Abstract: A dryer system is described that is configured to purify, by means of a wet scrubber, the exhaust gases created in the drying of a recording medium that has been printed to. Moreover, thermal energy may be extracted from the exhaust gases in the wet scrubber, which thermal energy is used in turn to dry the recording medium. An environmentally safe and energy-efficient drying may thus be enabled.

Abstract: A fluid for application onto a substrate is provided in a cavity of a hollow cylindrical application roller that has porous roller wall. Before reaching the transfer point to the substrate, fluid is regionally selectively pushed back away from the outer shell surface of the application roller, into the porous roller wall, by a knockback pressure, in order to regionally selectively produce the effect that, at the transfer point, fluid is located at the outer shell surface of the application roller or no fluid is located at the outer shell surface of the application roller. A regionally selective application of fluid onto a substrate may thus be efficiently produced.

Abstract: A fluid for application onto a substrate is provided in a cavity of a hollow cylindrical application roller that has porous roller wall. Before reaching the transfer point to the substrate, fluid is regionally selectively pushed back away from the outer shell surface of the application roller, into the porous roller wall, by a knockback pressure, in order to regionally selectively produce the effect that, at the transfer point, fluid is located at the outer shell surface of the application roller or no fluid is located at the outer shell surface of the application roller. A regionally selective application of fluid onto a substrate may thus be efficiently produced.

Abstract: In a method or system for driving a load element, a drive motor is provided on a drive shaft of the load element that establishes a drive rotation speed of the load element. A rotation torque sensor on the drive shaft emits a load torque signal proportional to a rotation torque. A rotation torque influencing device generates a supplementary torque when the load torque signal deviates from a desired load angle value present when a change has not occurred to a load created by the load element and acting on the drive motor, the supplementary torque being added to a drive torque generated by the drive motor such that a load angle of the drive motor remains substantially constant and uninfluenced by a change of the load.

Abstract: In a method or device for simultaneous double-sided printing of a recording medium, the first toner image having toner charged with a first polarity is generated on a first transfer belt and a second toner image having toner also charged with the first polarity is generated on a second transfer belt. A charge shifting device is provided along with a recharging device. At least one of the charge shifting device and the recharging device has a corotron. With the charge shifting device, the charge of the first toner image is shifted to a second polarity opposite to the first polarity and with the recharging device the second toner image with the first polarity is recharged. The recording medium is passed between the first and the second transfer belts.

Abstract: In a method or device for simultaneous double-sided printing of a recording medium, the first toner image comprising toner charged with a first polarity is generated on a first transfer belt and a second toner image comprising toner also charged with the first polarity is generated on a second transfer belt. A charge shifting device is provided along with a recharging device. At least one of the charge shifting device and the recharging device comprise a corotron. With the charge shifting device, the charge of the first toner image is shifted to a second polarity opposite to the first polarity and with the recharging device the second toner image with the first polarity is recharged. The recording medium is passed between the first and the second transfer belts.

Abstract: In a method or system for driving a load element, a drive motor is provided on a drive shaft of the load element that establishes a drive rotation speed of the load element. A rotation torque sensor on the drive shaft emits a load torque signal proportional to a rotation torque. A rotation torque influencing device generates a supplementary torque when the load torque signal deviates from a desired load angle value present when a change has not occurred to a load created by the load element and acting on the drive motor, the supplementary torque being added to a drive torque generated by the drive motor such that a load angle of the drive motor remains substantially constant and uninfluenced by a change of the load.

Abstract: A printer or copier operates to print a carrier material on both sides. A transfer station in the printer or copier has two transfer bands which transfer toner images onto the supporting material. A transfer corotron recharges the toner particles to a polarity for transfer to the carrier material at a transfer location. A first transfer mode provides for accumulating a plurality of toner images on the transfer band before transfer to the carrier material. A second transfer mode provides continuous transfer of the toner image to the carrier material.

Abstract: In order to remove a coating of toner, abrasion and paper dust adhering to a surface of an intermediate carrier, for example a photoconductor drum, an elastomer-coated drum is provided that rolls off on the intermediate carrier under contact pressure. A contact pressure region having at least one sub-region with slippage between the drum and the intermediate carrier forms in the contact pressure region.

Abstract: An electrographic printer device is designed for printing tape-shaped recording media (10) with different tape widths in different operating modes such as single-color and multi-color simplex printing, single-color and multi-color duplex printing and for simultaneous printing of two recording medium webs in parallel operation. It comprises a module-like device structure with a printer module having a means for generating toner images arranged therein. A single fixing station (18) is arranged above this means. Via a deflection means (28), the recording medium (10) is supplied in single-color or multi-color duplex mode to a return channel (38) that contains a turn-over station (30).

Abstract: An electrographic printer device is designed for printing web-shaped recording media (10) having different web widths in different operating modes, such as single-colored and multi-colored simplex printing, single-colored and multi-colored duplex printing and for simultaneously printing two recording medium webs in parallel operation. To this end, the units of the printer device such as intermediate carrier (11), transfer printing station (15) and fixing station (18) comprise a usable width of at least twice the web width of a narrow recording medium. The printer device further contains a deflection means (28) following the fixing station (18) and engageable as needed and having an allocated return channel to the transfer printing station (15) via which the recording medium (10) is turned and resupplied to the transfer printing station (15) in single-color or multi-color duplex mode.

Abstract: Single sheets A are drawn in the usual way from a first stack 8 of single sheets and conveyed on a first recording carrier conveying path 1. At its end there is a switch 10 which alternately feeds the single sheets A to a second and a third recording carrier conveying path 2, 3. In the second recording carrier conveying path 2 which is in the form of a loop, the single sheets A are shifted sideways by the width of one single sheet. A sideways shifted single sheet A1 and a single sheet A2 which has not been shifted sideways simultaneously reach a fourth recording carrier conveying path 4 on which they are conveyed in pairs to a printing unit D which spans the fourth recording carrier conveying path 4 and conveyed out of it again. Subsequently, one single sheet A1 per pair of single sheets is shifted back by the width of one single sheet in a fifth recording carrier conveying path 5 which is also designed as a loop while the other single sheet A2 is conveyed onwards linearly.

Abstract: An electrographic printer device is designed for printing web-shaped recording media (10) having different web widths in different operating modes, such as single-colored and multi-colored simplex printing, single-colored and multi-colored duplex printing and for simultaneously printing two recording medium webs in parallel operation. To this end, the units of the printer device such as intermediate carrier (11), transfer printing station (15) and fixing station (18) comprise a usable width of at least twice the web width of a narrow recording medium. The printer device further contains a deflection means (28) following the fixing station (18) and engageable as needed and having an allocated return channel to the transfer printing station (15) via which the recording medium (10) is turned and resupplied to the transfer printing station (15) in single-color or multi-color duplex mode.

Abstract: An electrographic printer device is designed for printing web-shaped recording media (10) having different web widths in different operating modes, such as single-colored and multi-colored simplex printing, single-colored and multi-colored duplex printing and for simultaneously printing two recording medium webs in parallel operation. To this end, the units of the printer device such as intermediate carrier (11), transfer printing station (15) and fixing station (18) comprise a usable width of at least twice the web width of a narrow recording medium. The printer device further contains a deflection means (28) following the fixing station (18) and engageable as needed and having an allocated return channel to the transfer printing station (15) via which the recording medium (10) is turned and resupplied to the transfer printing station (15) in single-color or multi-color duplex mode.