Siemens Aktiengesellschaft

Oce Printing Systems Gmbh

Siemens Nixdorf Informationssysteme Aktiengesellschaft

Josef Windele

Walter Kopp

Otto Olbrich

Edmund Creutzmann

Ernst Puritscher

Andreas Eckardt

Joachim Hoffmann

Gerhard Lodermann

Anton Sturzer

Adolf H&ouml;fler

Heinz John

A transfer printing station is provided which has two pairs of tractor drives movably arranged side-by-side on two drive shafts. During operation with only a single paper web, the unused tractor drives can be moved to a lateral parking position. The two pairs of tractor drives can be easily moved to match two different webs of paper of different widths. The structure enables a user to adapt the paper conveyor of a transfer printing station to operate with only a single paper web or two parallel webs.

Transfer printing station with adjustable-width paper conveyor means

Electrographic printer with compensation devices

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

Thermofixing device for a printing or copying machines having a low

An electrophotographic printer for printing on front & rear sides of reel paper has an electro-thermally operating fixing station (23) with a heated fixing roller (86) and a feed roller (87) which can be pivoted between at least one position against the fixing roller and another position away from the fixing roller. 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).

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 between at least one position against the fixing roller and another position away from the fixing roller. 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 printer also has a pivoting print transfer station and a paper dividing device separately pivotable from the print transfer station.

Arrangement for the mechanical coupling of physical units of an

The invention relates to a contact pressure mechanism for pressing or lifting a web-shaped image receiving material against or off from a drum-shaped image carrier in a toner image transfer station of an electro-photographic recording or copying device comprising a contact pressure rail extending over the width of the image receiving material which can be swiveled in and out via an electro-magnetic actuation device. The image receiving material is thereby situated in positive engagement with transport elements in the form of tractors which are arranged preceding and following the contact pressure rail. The image receiving material is conducted over a length compensating means arranged between a transport element and the contact pressure rail, said length compensation means having a seating surface for the image receiving material, whereby the length compensating means is coupled such to the contact pressure rail that the seating surface thereof executes a motion opposite the pivot motion of the contact pressure rail and thus releases or compensates the length of the image receiving material required or becoming free during the in/out-swivel of the contact pressure rail.

Contact pressure mechanism for a web-shaped image receiving material

A recording carrier transport and feed unit is disclosed which includes attached together transport and feed assemblies for moving a side margin punched recording carrier web to, and withdrawing it from, the intermediate carrier of an electrostatic printer or copier. The transport assembly includes spaced parallel drive belts, each trained about at least three spaced wheel means, one of which is rotatably driven. One span of the belts presents the recording carrier to the feed device while another span withdraws the recording carrier from the feed device. The feed device presents the recording carrier to the intermediate carrier and directs it away from the intermediate carrier. The entire unit is pivotable towards and away from the intermediate carrier.

Recording carrier transport assembly for use with side margin punched

In the non-mechanical printing art relating to equipment for reproducing a negative on a photoelectric data carrier, a mechanical device for readily detachably applying a negative to a cylinder in such a manner as to assure flush application of the negative to the cylinder and proper positioning of the negative. The negative is provided with a spring contact strip at the leading edge and a knob contact strip at the trailing edge. The film is wrapped around the cylinder such that springs on the spring contact strip are caused to snap over knobs on the knob contact strip causing a tight wrapping of the film about the cylinder. The spring contact strip and the knob contact strip are positioned in proper registry with the film by the use of round and square locating markers and corresponding holes on the films and the strips respectively.

Device for detachable attachment of a print original to a cylinder

A device for moving a path of a moving data carrier toward and away from a surface area of a sub-carrier characterized by two pivotal support members which are mounted to pivot about respective pivot points and are pivotable between a first or forward position with a data carrier disposed closely adjacent the surface area of the sub-carrier and a second or outward position with the data carrier spaced from the suface area of the sub-carrier. The pivotal support members each have a first engaging zone and a second engaging zone and are symmetrically disposed relative to a center of the contact area so that the data carrier is in continual engagement with all of the engaging zone and maintained under a constant tension regardless of the position of the support members.

Growing community of inventors

Puchheim, Germany

Josef Windele