Abstract: In a method and apparatus for adjusting an electrographic printing or copying process, information to be printed is generated as a toner intermediate image on a support for intermediate images and is subsequently transmitted from a reprinting surface to a recording medium at a transfer printing zone. A toner mark is produced on an electrographic support for intermediate images. The toner mark is at least partially scanned on the support for intermediate images and is then removed from the support for intermediate images. The toner Ad concentration is adjusted in a developing station by means of a measured value based on scanning the toner mark. Transfer of the toner intermediate image from the reprinting surface to the recording medium at the transfer printing zone is at least temporarily prevented in the period between the production and the removal of the toner mark.

Abstract: In a web guidance device, particularly for a continuous form printer device, deflection seat is provided around which a recording medium web is guided in a conveying direction. A lateral guide roller influences the recording medium web with a laterally acting force in a region of a deflection seat such that the recording medium web lies against the lateral detent. A planarly acting hold-down element is provided in a region of a lateral guide roller, the hold-down element pressing the recording medium web onto the deflection seat with a specific pressing power.

Abstract: A fixing station for a printer or copier includes a heating device for fusing toner to the carrier material and a cover that is selectively insertable between the heating element and the carrier material. The cover may be a window blind type cover. Where two sided fixing is provided, both heating devices have a cover. The cover may have an energy storage spring to cause the heating device to be covered in the event of an emergency. An electro-magnetic locking device may be provided to retain the cover in an open position.

Abstract: In a method and system for transmitting print data in blocks from a transmission unit to a reception unit via a data line by means of channel command words (CCWs), a channel initialization command (unit) is transmitted from the reception unit to the transmission unit for starting the data transmission of a first data block and the data block is transmitted from the transmission unit to the reception unit. The reception unit forwards the received data blocks to a check unit for checking the data integrity (parsing) and promptly sends a transmission confirmation message (Sim Term) to the transmission unit before or during the checking process (parsing), so that a second data block can be transmitted from the transmission unit into an intermediate memory of the reception unit during the checking process (parsing) of the first data block.

Abstract: A method in which a multilevel character generator (22) is adjusted using a single correction factor (KF) during an automatic compensation operation such that high-quality printed images can be obtained also in the instance of modified printing conditions.

Abstract: The invention relates to an electrographic printing or photocopying device and method. A toner mark (10) is provided on a photoconductive drum and printed with toner using a developing station. The toner mark (10) is scanned by a sensor at two points of measurement (a1,a2). The amount of toner in a developing mixture consisting of two components depends upon the difference (&Dgr;U) or the quotient of the amount of the signals of the sensor at both points of measurement. A device which is also disclosed enables the exact length of the toner mark (10) to be determined.

Abstract: A method and device to control a paper drive mechanism of an electrographic printer or copier by friction feed. Optical markings are provided on the recording medium, and a sensor scans an area of the recording medium for the optical marking during transport of the recording medium. An evaluation device evaluates the signals from the sensor for two successive markings corresponding to page length. High speed conveyance of the recording medium is controlled according to page length identified by the evaluation device.

Abstract: A device and a method for the holding of a drum in a printer or copier. A star-shaped spring intercepting the differing longitudinal expansions of photoconductor drum and a shaft is arranged between an outer ring bearing the drum and an inner ring.

Abstract: A triplex printing system has three electrographic printer devices which enables both-sided, exactly registered printing of a paper web. For this purpose, the front side is printed in a first printer, the backside is printed in a second printer and the backside is printed again superimposed in a third printer. As a result of the arrangement of two printer chains having six printers, the structuring of a variable printing system adjustable dependent on function having a plurality of printer lanes is possible.

Abstract: A device and method for inking a charge pattern of a carrier medium. The device includes a toner sprayer that generates and directs a mixed toner stream onto a surface of an application element. The mixed toner stream includes a number of charge toner and air particles and forms a toner layer when the mixed toner stream contacts the application element surface. The application element is movably positioned in close proximity to the carrier medium for transferring the charged toner particles onto the charge pattern of the carrier medium for inking the same.

Abstract: An apparatus for transporting web-shaped recording media through an electrographic printer or copier has a support member which supports driving and guiding elements. The support is pivotally mounted in the housing via a support shaft. The recording medium is transported by friction by a drive roller mounted on the support, the recording medium being pressed against the toner carrier by a pressing member. The supporting shaft and the drive roller run in a coaxial manner.

Abstract: In a method for improving the printing quality for electrographic color printing, print consumables, particularly toner, are monitored in container-exact fashion and substance-specific information are employed for the control of the printing process. Toner expiration dates for the consumables are identified and noted early at the respective printing location. The consumable contained in the container and the amount of consumable contained is thus stored in machine-readable fashion at the container. An information carrier is provided at the container for non-contacting transmission of data and energy from a data read and/or write station to the container. A transponder that is provided with an individual hardware identifier is provided as the information carrier. The hardware identifier may be employed as a component part of codes for device control. The printer or copier system disclosed includes a recycling concept for consumables containers.

Abstract: A printer or copier includes a high speed monochrome or two color printer portion and a slower full color printer portion. Print job signals are divided into monochrome and color printed pages and sent to the corresponding printer portion. The printers, or a paper handling path between the printers, is controlled to assemble the printed pages into a predetermined sequence order.

Abstract: In a method and device for controlling several stepping motor modules in printing or copying machines, sets of ramp data are centrally calculated in a computer in a calculation phase and are transmitted via a bus system to one logic unit each in a loading phase. The ramp data are stored in the stepping motor modules in non-volatile memories and are loaded to corresponding main memories depending on operating conditions. When a stepping motor module is operational, the current set of ramp data is transmitted by a control unit. A start signal transmitted by the control unit initiates the conversion of the set of ramp data selected in the corresponding logic unit into impulses of variable distance.

Abstract: A mechanism and a method for generating a corona discharge by a wire-shaped corona discharge electrode provides that the corona discharge electrode is stretched between two end blocks that respectively contain a space for the acceptance of a respective electrode holder insert. The electrode holder insert has a rotational-symmetrical electrode receptacle element with an axially parallel electrode receptacle channel in the generated surface as well as a further electrode receptacle channel in an end face, the further channel adjoining the axially parallel channel and residing perpendicularly thereon, and also has an annular cap element that, proceeding from the end face containing the further electrode receptacle channel, can be pressed onto the electrode receptacle element with the corona discharge electrode guided in the electrode receptacle channels.

Abstract: An apparatus has an arrangement for an input unit which provides control data for an electrical apparatus such as a printer or a copier and the arrangement allows the input unit to be shifted between an idle position within a cabinet of the apparatus to an operating position which extends outside of the cabinet to allow access. The arrangement is inclined so that the movement from the idle to the operating position is in a downwardly inclined direction.

Abstract: A method and a control for a drive which is devoid of a sprocket feed and located in an electrographic printer which outputs information on a striplike recording medium divided up into pages. It is possible to determine in a start mode whether perforated or non-perforated paper has been inserted into the printer. A recording medium with marginal perforation is initially conveyed in steps according to a control grid until it fits tightly into a larger conveyor grid which corresponds to a fraction of the distance between perforations. Subsequently, the recording medium is conveyed in normal operating mode in steps according to the conveyor grid.

Abstract: A printing device, in particular a printer or a copier, and method for its operation which includes a first electrographic printing unit for printing an image pattern on a sheet-type material in a first transfer printing transport path as well as a second electrographic printing unit for printing an image pattern on a sheet-type material in a second transfer printing transport path, and further including an input section via which the sheet-type material can be supplied individually one after the other to both the first and second electrographic printing units, and further having an output section via which the printed sheet-type material from either the first or second electrographic printing units is ejected individually one after the other. The first and second printing units are in first and second transfer printing transport paths that are connected by connecting paths that form first and second rings.

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 for printing tape-shaped recording media (10) in duplex and simplex printing contains two transfer printing stations (15/1,15/2) that can be pivoted against and away from the photoconductive drum (11). The first transfer printing station (15/1) serves for transferring toner images allocated to the front side, the second transfer printing station (15/2) serves for transferring back side toner images. A mechanical buffer storage (29) and a turn-over means (28) with preceding intermediate fixing station in the form of a photoflash fixing station (31) are arranged between the transfer printing stations (15/1,15/2).