Oce Printing Systems Gmbh

Siemens Aktiengesellschaft

Siemens Nixdorf Informationssysteme Aktiengesellschaft

Other

Oc&eacute; Printing Systems Gmbh

Siemens Informationssysteme Aktiengesellschaft

Walter Kopp

Edmund Creutzmann

Josef Windele

Hans Winter

Joachim Hoffmann

Karl-Heinz Saalmueller

Martin Schleusener

Otto Olbrich

Hubert Mugrauer

Andreas Eckardt

Reinhard Apel

Rudolf Waechtler

Joseph Knott

Hans Manzer

Otto Ferber

Ernst Puritscher

Bernd Schoch

Gerhard Klapettek

Anton Stuerzer

Josef Schreieder

Helmut Berger

Helmut Reichl

Peter Bergmann

Martin Silbersack

Martin Faust

Heinz Herzog

John Heinz

Anton Sturzer

Karl-Heinz Saalmuller

In a cleaning arrangement for a moving element to be cleaned in an electrographic printing apparatus, a cleaning element is provided that has a cleaning member for cleaning which rests on a surface of the moving element to be cleaned. A drive unit for the cleaning element is provided that actuates the cleaning element such that the cleaning member cleans the surface of the moving element to be cleaned region-by-region.

Cleaning arrangement for a moving element to be cleaned in an electrographic printing apparatus

An electrographic printing device has at least one printing unit with a toner image carrier. A printing device for producing a toner image prints at least one mark on a photoconductor belt. The toner contained on the photoconductor belt is transferred to a transfer belt at a first transfer point and transferred from said transfer belt to a strip-shaped support material at a second transfer point. A sensor situated on the transfer belt detects the passage of the mark and a control unit determines the time that has elapsed between the time of printing and the time at which the mark is detected and controls the transportation of the strip-shaped support material accordingly.

Electrographic printing device with a sensor for detecting slipping

In a thermal fixing system for fixing toner images on the front side of a recording medium in an electrographic printer or copier device, the back side of the recording medium can already have a fixed toner image. The thermal fixing means contains a heat transfer fixing station that fixes the toner images on the recording medium, and contains a pre-heating saddle that precedes the heat transfer fixing station in a running direction of the recording medium. A sliding surface that accepts the recording medium over its back side is allocated to the pre-heating saddle. The sliding surface is constructed of a toner-repellant material at least in a contact region with the recording medium. The preheating saddle is designed as a low temperature saddle with the largest possible constructional length, so that a temperature difference between recording substrate and saddle surface is as small as possible. The preheating saddle has, in the recording substrate running direction, a plurality of heating zones. A control device controls the heating zones in such a manner that, along the preheating saddle, an approximately constant thermal energy flow occurs on the saddle surface to the recording substrate. For matching the preheating saddle to various recording substrate widths, the preheating saddle is subdivided, transversely to the recording substrate running direction, into individually drivable transverse heating zones.

Thermal fixing system for recording media of a printer or copier device that are printed on one or both sides

A method and apparatus for an electrographic printer or copier provides a first layer of toner particles is deposited on a first toner receiving surface by a force field. The amount of toner actually applied is detected at at least one point in the first layer. The force field is modified according to changes in the actual amount of toner from the predetermined amount of toner.

Operational method for an electrographic printer or copier

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.

Printer and copier device and method for performance-adapted, monochrome and/or chromatic, single-sided or both-sided printing of a recording medium

A printer or copier device has a developer station with fixing drums for fixing the toner image on the recording medium. A guide yoke guides the recording medium to the fixing drums. The guide yoke includes a deflector edge over which the recording medium is fed. The deflector is replaceable and is formed of wear-resistant material in the region that contacts the recording medium. The deflector edge may include a deflector element with a plurality of deflection edges and which can be rotated to expose different edges.

Printer or copier image fixing station with guide yoke having low-wear deflector edge

A method for operating electrographic printers or copiers uses toner particles of two different colors applied to a toner image carrier by at least two developing units. A force field is applied to at least one section of the travel path of the toner particles from a toner container to the toner image carrier to cause the toner particles to be carried in the direction of the toner image carrier. Changing the force field causes an interruption of the transfer of the toner particles with the developer stations are in a rest position.

Method for operating an electrographic printer or copier for printing different colors with at least two developing units

A printer or copier has a developer station for a toner image wherein a photoconductive drum is provided with a latent charge image that is developed by applying a toner/air mixture to a developer drum that in turn applies the toner to the photoconductive drum. The toner is charged by a charging device as it is applied to the developer drum. A sensor senses the toner on the developer drum and a control varies the quantity of toner applied. The sensor is an optical sensor or a capacitive sensor, and the charge applied to the toner by the charging device is varied depending on the sensor output. A voltage applied to the developer drum may also be varied.

Method and apparatus for image development in an electrographic printer or copier

Device for the positionally exact synchronization of the parallel course

Electrographic printer with adjustable corona device

Printer means for printing front and/or back side of a band-shaped

Electrographic printer with compensation devices

For transporting finely powdered toner material from a reservoir to a delivery opening, a porous bed that forms a down grade is charged with compressed air proceeding from below, whereby the toner material mixes with air to form a liquid-like mixture. This mixture flows along the down grade from the reservoir to the delivery opening.

Apparatus and method for transporting finely powdered toner material

A method for operation of a printing mechanism in an electrographic printer or copier, whereby a charge image is applied at a surface region of a toner image carrier. The surface region provided with the charge image is conveyed past at the transfer surface of a transfer element at a spacing of a developing gap. The actual width of the gap is controlled with a loop control circuit.

Method for the operation of a printing mechanism in an electrographic

An electrophotographic printer has an electro-thermally operating fixing station (23) with a heated fixing roller (86) and a feed roller (87) which can be pivoted on and away. With the aid of an unheated, pivoting paper guide saddle (93), the reel paper is guided around the fixing roller (86) at a predeterminable wrapping angle (U) for the purpose of preheating before the actual fixing. In order to fix the printed image on the reel paper (12) in an offset-free and smudge-free manner during the starting and stopping process, the movements of the elements of the fixing station (23) and the transport of the paper are coordinated in such a way that there is no relative movement between the fixing roller (86) and toner image on the reel paper (12) when the reel paper is placed against the fixing roller (86) and when the reel paper (12) is stripped off the fixing roller (86). The wrapping angle will change between a standby and an operating position and depending on the temperature of the fixing roller and the transport speed of the paper.

Electrophotographic printer for reel paper having a thermal print fixing

Growing community of inventors

Taufkirchen, Germany

Walter Kopp