EP0741877A1

EP0741877A1 - Document printer

Info

Publication number: EP0741877A1
Application number: EP95906240A
Authority: EP
Inventors: Manfred Wiedemer
Original assignee: Oce Printing Systems GmbH and Co KG; Wincor Nixdorf International GmbH
Current assignee: Canon Production Printing Germany GmbH and Co KG
Priority date: 1994-01-24
Filing date: 1995-01-16
Publication date: 1996-11-13
Anticipated expiration: 2015-01-16
Also published as: WO1995020185A1; DE59505593D1; EP0741877B1; JPH09507716A; US5860781A

Abstract

A document printer with a paper feed (E1, E2) handling a strip print substrate (A) of selectable configuration, with a downstream electrographic printer (DRU) which can print the strip substrate (A) on one or both sides and a post-print forms handling device connected to the electrographic printer (DRU) on the output side. Said processor has a print-page separator (V), a buffer store (ZS) to accept the separated print-pages by job and a job finisher (JF) connected to the buffer store to collate the print-pages from the buffer store (ZS) into a document.

Description

Document printing device

The invention relates to an apparatus and method for producing documents composed of single sheets with the aid of an electrographic printing device printing on tape-like recording media.

Documents such as brochures, insurance policies, etc., which are created with the aid of electrographic, magnetographic or other non-impact printing devices, are preferably composed of single sheets of differently colored or differently pre-printed papers or of different grammages (e.g. paper weights).

Single sheet printers with different (e.g. 4) input bins are used for these applications. The documents can therefore be printed in the correct sequence by appropriately selecting the input compartments.

Single sheet printers require increased technical effort for paper handling and printing. The transport of single sheets is also prone to failure. Only paper weights and formats in a narrow range can still be used.

It is known to couple electrographic printers that process continuous paper to a separating device (cutting device) and thus separate the printed pages on a job-by-job basis, but only one format or a certain paper weight can be used here. Furthermore, the ascending order in the printing process with continuous paper is generally difficult to verify. Other paper weights and formats have to be added subsequently in a separate work process.

The aim of the invention is to provide a printing device and a method of the type mentioned at the outset, with which documents can be produced from single sheets in a simple and inexpensive manner with high print quality and at high printing speed. This object of the invention is achieved according to the features of claims 1 and 16. Advantageous developments of the invention are characterized in the subclaims.

The invention combines the technical advantages of an electrographic printing device working with continuous paper, for example with regard to processing speed, print quality and economy, with the advantages of a single sheet machine.

As a printing device, the document printing device uses an electrographic individual printing device which is suitable for printing on single and double sides (simplex duplex). Due to the friction drive for the record carrier, the printing device can process roll and folded paper (leporelio paper) with and without edge perforation and with separation perforation. The change of paper type is limited to a few processes, e.g. B. depending on the number of paper types. For example, in the case of a short run of a brochure in print types assigned to paper types (paper configuration), all sheets of the same paper type are printed. The cover sheets to be inserted into the brochure are first stored electronically and, after the "normal" or actual information sheets have been printed, are printed by changing the paper type once. The merging of the normal sheets with the cover sheets for the brochure takes place in the printer output station, which can then also be bound or stapled as required. The process flow is monitored by adding up the individual sheets and processing them in the buffer, thus guaranteeing their safe execution. In addition, externally generated single sheets, for example advertising brochures, can also be fed into this collating function via an external input. To make it easier to change the paper configuration, the paper feeder can have externally arranged paper supply rolls of different sizes and paper quality. The change can be made manually or automatically via the printer control. An embodiment of the invention is shown in the drawings and is described in more detail below, for example. Show it:

1 shows a schematic representation of a document printing device with an electrographic printing device

Figure 2 is a schematic representation of the paper feed area of the electrographic printing device

FIG. 3 shows a schematic illustration of an electrographic printing device for printing on tape-shaped recording media in duplex mode,

FIG. 4 shows a schematic illustration of the same electrographic printing device in two-color duplex operation,

FIG. 5 shows a schematic illustration of the same electrographic printing device in two-color simplex operation,

FIG. 6 shows a schematic illustration of the same electrographic printing device in simplex mode for printing on a wide tape-shaped recording medium,

FIG. 7 shows a schematic illustration of the same electrographic printing device in simplex mode for simultaneous printing on two tape-shaped recording media,

FIG. 8 shows a schematic illustration of a deflection device arranged in the electrographic printing device in continuous operation (simplex printing) and

FIG. 9 shows a schematic illustration of the same deflection device in turning operation (duplex printing). The document printing device shown in FIG. 1 combines the performance of a continuous printing device with the performance of a single sheet printing device. It essentially consists of a paper feed device PZ with two input areas E1 and E2. In the illustrated embodiment, roll paper is used in both input areas, but roll paper and pre-folded continuous paper can also be used in accordance with the embodiment of FIG. 2. The input part E1 contains a large roll of paper, typically made of white paper, that is to say a recording medium from which the majority of the printed pages are made. The input media E2 contains the recording media rolled up on two rolls, eg for cover sheets, ie from a type of paper that is used less. Four rollers can also be arranged in the input compartment E2 if, for example, a recording medium is used which has a recording medium width corresponding to the examples in FIGS. 3, 4 and 5. In this case, a total of four rolls can be arranged in the input compartment E2, two at the top and two at the bottom. Downstream of the paper feed device PZ is an electrographic printing unit DRA, which can be designed in accordance with the exemplary embodiments of FIGS. 3 to 9, in which the continuous paper A can be printed on one side or on both sides within the unit. A paper postprocessing device is coupled on the output side to the printing unit DA, which separates the printed continuous paper and assembles a document from the individual sheets. For this purpose, the paper post-processing device contains a printed page separating device V in the form of a cutting device with associated waste disposal in the form of, for example, a container which receives the cut-off parts of the recording medium A. Furthermore, the paper machine processing device contains an intermediate memory ZS for the job-related recording of the individual printed pages, which are stored in the form of containers designed partial memories T1 to TN. Furthermore, the buffer store ZS contains a single sheet stacking device ES, which is operated when only one type of paper is being printed on a large scale. The buffer store ZS is coupled to a job finishing device JF for document-associated assembly of printed pages removed from the buffer store. The job finishing device can also contain a binding or stapling device for stapling or binding the document assembled via the job finishing device. The document bound in this way is output via an output device (exit). The document printing device is controlled by a job organization control unit JS, which can be microprocessor-controlled. It includes input means, for example in the form of a panel P for inputting the document structure. This entry can be made manually, but it can also be controlled via a data connection to a PC or a desk-top publishing facility. The job organization control unit JS furthermore contains, for example, a microprocessor-controlled selection control unit AS, in order to print on the tape-shaped recording medium A in the printing unit DRA as a function of the document structure entered via the input unit P, to separate it and to store it in the buffer ZS job-assigned and to store the individual jobs in the job finishing device JF according to the desired document structure to merge into one document. The job organization control unit JS can be coupled via interfaces to an EDP system and operated online (SCH1) or it is connected to an internal, eg desk-top publishing unit and is operated offline (SCH2). Furthermore, the job organization control unit JS is assigned a monitoring arrangement in the form of a job sequence control. This contains an input-side counter C1 and an output-side counter C2 as well as a comparison unit VG coupled to the counters C1 and C2. With the counters C1 and C2, the printed pages processed in the printing unit DRA are counted and compared with the individual sheets stored in the intermediate storage ZS. Depending on this comparison process, an evaluation signal is triggered by the comparison device VG. If the number is different, an error signal is generated (error). If the number of printed pages is identical, no printed page has been lost and an OK signal is generated.

The buffer store is also equipped with an external loading device EB via the individual sub-stores T1 to TN, e.g. externally pre-printed individual sheets in the form of advertising brochures or the like can be supplied.

The entire printing facility works as follows:

If, for example, a brochure is to be printed from 30 individual sheets with an associated cover sheet, the document structure is entered via the panels P of the organization control unit. The entry can also be made from a host or from disk storage or online via the SH1 interface from a coupled computer system come. The job organization control unit JS sorts the print information in a storage unit, the frequently occurring print pages being assigned to one type of paper to a storage area and the less frequent to another type of paper (eg cover sheets) to another storage area. Then everything is printed in one job by one paper type and then by the other paper type in another job. In the case shown, therefore, continuous paper is first drawn off from the large paper roll of the input device E1 and this is printed with the frequently occurring single-sheet print data, and then this job with the printed pages is stored, for example, in the partial container T1 of the intermediate store ZS. The cover sheet is then printed in a further job by pulling the paper type assigned to the cover sheet from the input tray E2, this job then being stored in the sub-tray T2. The portion of the job that corresponds to one type of paper is practically always done and then transferred to the portion of the job of the other type of paper. The format cut and the separation before being stored in the intermediate storage ZS takes place in the format cut device V. Then, in the job finishing device JF controlled by the job organization control unit JS, the document is compiled, namely by collating the jobs in the desired order by removing them from the sub-compartments T1 to TN of the buffer store ZS.

With the paper feed device PZ, in the illustrated embodiment of the printing device DRA, continuous paper of the desired type is fed automatically or by hand, depending on the requirement. The continuous paper is printed, separated and a document is compiled from the separated continuous paper of various types of paper. The single sheet stacker ES is used e.g. when printing brochures with a large number of printed pages from the same paper, stacking these printed pages from the same paper and then adding a cover sheet from a different paper type to the stack, for example from 50 pages of the same paper, which was then printed in a different job.

The printing unit DRA can process continuous paper with and without edge perforations. For this purpose, it contains a friction drive, which is described in more detail in connection with FIG. 2.

The job organization control unit JS essentially has a memory organization function. Depending on an index, it saves which Paper is used or what information must be printed on which paper. Depending on the job and the weight of the job, this information is saved so that it can be called up again. This information must be programmed by the operator or user via online or offline in the manner described. If, for example, an insurance policy is composed, for example, of a job of three, ie an invoice, a personal cover letter and an insurance policy, with all three individual sheets consisting of a different paper, the present document printing device, for example, first of all uses the insurance policy on one separate paper type is printed in very large numbers and stored in the partial memory T1 of the intermediate store ZS. The job organization control unit JS stores the printed job but does not yet acknowledge it. Next, the invoice is printed on another paper, for example drawn from the smaller rolls, in a correspondingly large number and in the storage T2 of the intermediate storage ZS, and this job is stored and also not yet acknowledged. The personal letter is then printed out, for example, this job then being stored in the partial memory T3 of the intermediate memory ZS. The personalized letters are then merged as individual documents via the job finishing device JF and, for example, inserted and sent in a corresponding inserting device. If advertising brochures are now to be added to these personalized letters, these advertising brochures can be supplied via the external loading device EB.

The printing device shown in FIG. 2 with a friction drive for processing tape-shaped recording media A has an actual printing unit DA which e.g. 3-9 can be designed and a paper feed device PZ. Both together form the printing unit DRA of FIG. 1.

The printing unit DA is designed for processing reel-shaped or carrier-shaped recording media A configured as stacks. It has a friction drive 8 consisting of two friction rollers 13, between which the record carrier A is passed. The tape-shaped record carrier A is fed via a paper feed device PZ in the following manner. In a paper input device 1, the continuous paper, which is made up as pre-folded leporello paper, but has no lateral transport holes, is first deflected or braked via two fixed axes 2 (paper divider) without substantial web tension. The fixed axles 2 work both as a light brake and as a paper divider, e.g. to separated web layers from one another, in a web pre-centering 3 the paper web is deflected (approx. 90 °) and by means of two inclined friction rollers 4 (FIG. 2) in frictional contact with the recording medium A (FIG. 2) against a left web boundary 5 in Form of a stop pushed. The position of the paper web or the recording medium A is thus determined by the contact of the web edge on the left web boundary of the paper channel of the paper feed device. However, it is also possible to use the right-hand path delimiter by arranging the rollers 4 accordingly.

After web pre-centering via the web pre-centering device of FIG. 2, the tension in paper web A is increased by a web brake. It is important that the paper web A is braked only in the transport direction and not at an angle or asymmetrically. This can be done, for example, by means of a vacuum brake 6 with an associated vacuum pump 7. Due to the tension, the paper web A aligns itself in the drive 8 and looks for a central position. The drive of the paper guide 8 is designed as a friction drive with as little slip as possible or a constant coefficient of friction for the service life, for this purpose it contains two friction rollers 13, between which the record carrier is passed. The higher the tension, the less the lateral pendulum movements of web A and vice versa. This relationship also applies to the flatness of paper web A.

Deflection rollers 9 arranged behind the vacuum brake 6 form a stabilization zone in which the paper path of the paper web A is stabilized. Drift-side drift influences on the paper web or on the contact of the paper web with the web delimitation 5 in the web pre-centering device 3 are thereby greatly reduced. The effect of the stabilizing rollers 9 is particularly effective with the largest possible wrap (large contact surfaces) and with friction linings on the rollers.

A mechanical belt store in the form of a loop puller 10 is arranged in the stabilization zone, with two fixed rollers and one oscillating roller which is moved against a spring. The eyestrainer keeps the paper web A under tension during start-stop backward transport. It prevents the recording medium from tearing. The tension in the paper web A for this case is somewhat below the usual tension and is almost constant over the entire working range of the loop puller up to the stop. After passing through the loop puller, the paper web A is fed to the friction drive 8 of the printing unit DA.

If the printing device is operated with roll paper which is pulled off a roll 11, it is favorable to separately drive or brake the roll 11 as shown. The drive of the roller 11 or its brake is controlled so that a defined loop 12 is formed between the roller 11 and the paper 1, which serves as a mechanical paper storage. The feed into the web pre-centering 3 thus takes place under similar conditions as when operating end staple paper stacks of the paper input 1.

In summary, the continuous paper guide can be functionally subdivided into the following steps: paper input via roll or stack with the following web pre-centering by lateral paper installation in a web pre-centering device. Increase the tension with the help of a train brake. Stabilization of the record carrier web in a web stabilization device with directed reaction. Passing through a loop puller to tear open the To prevent the drawing carrier web in the start-stop mode and to transport the recording carrier web through the printing device in a friction drive.

The electrographic printing unit DRA of the document printing device is suitable for printing on tape-shaped recording media A of different bandwidths and can be designed, for example, in accordance with FIGS. 3-9. It contains, as an intermediate support Z, an electromotive photoconductor drum. Instead of the photoconductor drum, however, a band-shaped intermediate carrier, e.g. use an OPC tape or a magneto-styli arrangement, e.g. is described in EP-B1-0 191 521. The various units for the electrophotographic process are grouped around the intermediate carrier Z. These are essentially: a charging device L in the form of a charging corotron for charging the intermediate carrier Z; a character generator ZG with a light-emitting diode comb for character-dependent exposure of the intermediate carrier Z, which extends over the entire usable width of the intermediate carrier Z; a developer station 14 for coloring the character-dependent charge image on the intermediate carrier Z with the aid of a one- or two-component developer mixture; a transfer printing station 15 which extends over the width of the intermediate carrier Z and with which the toner images are transferred to the recording medium A. To remove the residual toner after development and transfer printing, a cleaning station 16 is provided, with a cleaning brush integrated therein with the associated suction device and a discharge device 17. The intermediate carrier 11 is driven by an electric motor and moved in the direction of the arrow in printing operation.

Furthermore, the printing device contains a fixing station 18, which is arranged downstream of the transfer printing station 15 in the transport direction of the recording medium and which is designed as a thermal printing fixing station, with a heated fixing roller 19 with an associated pressure roller 20, and guide rollers 21 arranged downstream of the fixing station, which, among other things, serve as output elements serve for a stacking device 22 for the recording medium A. Instead of the fixing station shown, other fixing stations are also possible, for example with a heated or unheated inlet saddle or a cold fixing station. The tape-shaped recording medium A is made up, for example, as prefolded continuous paper provided with edge perforations and is fed from a storage area 23 to the transfer station via feed rollers 24. However, it is also possible to Feed carrier without edge perforations via a roller feed according to the friction drive 8 of Figure 2.

In the exemplary embodiment shown, the record carrier is transported by friction via a friction drive according to FIG. 2, which is controlled by a control arrangement scanning synchronization marks. Furthermore, a deflection device 28 is arranged in the housing area of the printing device between the storage area 23 and the fixing station 18, the function of which will be explained later and via which the recording medium is returned from the fixing station 18 to the printing station 15.

The printing device is controlled via a printer controller, which is shown schematically here, with a central unit CPU, a page memory SP, which is divided into memory areas depending on the page, and a data control unit DC. All control units are connected to each other and to the units of the printing device via a BUS system.

The electrographic printing device is suitable for printing record carriers with different bandwidths. For this purpose, the intermediate carrier Z (photoconductor drum) has a usable width which corresponds to the largest possible recording medium width (e.g. a format DIN A3 landscape). This width corresponds to twice the A4 bandwidth. It is thus possible to arrange two recording medium widths DIN A4 alongside one another in the area of the transfer printing station 15. The fixing station 18 and the other electrophotographic units, such as developer station 14, character generator ZG, cleaning station 16 are designed in accordance with this usable width.

Adapting the width of the character generator ZG to different recording medium widths does not require any mechanical change to the character generator if, as in this case, an LED character generator is used, with a plurality of LEDs arranged in rows. Adaptation to the recording medium width used is carried out electronically by activation. The deflecting device 28 arranged in a return channel for narrow recording media from the fixing station to the transfer printing station has two functions: it is used in continuous operation (FIG. 8) for laterally displacing the recording medium web and in turning operation (FIG. 9) for rotating the front and rear sides of the Record carrier. It is switchable depending on the operating mode. Three deflection elements 29/1, 29/2 and 29/3 designed as rollers or deflecting rods with a smooth, wear-resistant surface serve for the vertical deflection of the recording medium. With a corresponding arrangement of the deflecting device in the printing device in accordance with the exemplary embodiments of FIGS. 3 to 5, the function of the deflecting element 29/2 can be taken over by the feed rollers 24. Furthermore, the deflection device contains a deflection contour consisting of two deflection rods 30/1 and 30/2, which in the illustrated embodiment are arranged inclined at 45 ° to the transport direction of the recording medium. The second deflecting rod 30/2, seen in the transport direction of the recording medium, is arranged such that it can be swiveled by a mechanism (not shown here), namely from a position parallel to the first deflecting rod 30/1 into a position perpendicular to it. The deflecting rods 30/1 and 30/2 must not be designed as rotating rollers, since the recording medium would run away to the side in the rolling motion. They are designed as a standing roller or as a corresponding molded part. Since the record carrier, which is usually made of paper, grinds over the surface, it is advantageous to choose a smooth and wear-resistant coating and / or to blow air through openings which may be in the contact area and thereby build up an air cushion. The horizontal deflecting elements 29/1 to 29/3 can be designed as rotatable rollers or, depending on the deflecting contour, as fixed deflecting rods with air outlet openings if necessary.

In the continuous operation shown in FIG. 8, the recording medium returned from the fixing station 18 is first deflected downward via the deflecting roller 29/1 and then guided around the deflecting rod 30/1 in the direction of the arrow and thus deflected horizontally. Then there is another deflection around the deflecting rod 30/2 in the vertical direction downwards. After redirection by the horizontal deflection roller 29/3, the width-offset drawing carrier is fed to the deflection element 29/2 or the feed rollers 24. In the turning position of the deflection device shown in FIG. 9, the recording medium is turned through 180 ° in the manner shown. The recording medium is first deflected downward via the horizontal deflection roller 29/1, guided from front to back around the first oblique deflection rod 30/1 and thus deflected horizontally. This is followed by another deflection around the second inclined deflecting rod 30/2 with subsequent feeding to the horizontal deflecting element 29/2 or the feed rollers 24.

Function of the electrographic printing device in different operating modes

Simplex operation

The printing device according to the invention enables a wide variety of operating modes without changing the hardware structure. For one-sided printing of a wide recording medium as shown in FIG. 6, the recording medium is guided in a conventional manner starting from the storage area 23 (storage stack) via the feed rollers 24 to the transfer printing station 15, there provided with toner images and fixed in the fixing station 18 and then stored in the stacking device 22. The transport takes place via the transport device 25, which engages in the perforations on the edge of the record carrier, the width of the transport device 25 being set in accordance with the width of the record carrier.

Such a wide recording medium makes it possible, for example, to print with DIN A3 toner images arranged transversely or with two DIN A4 toner images arranged next to one another.

For printing on two narrow recording media arranged side by side, e.g. With a width of A4, the two recording medium webs 10/1, 10/2 are guided in parallel through the printing device, as shown in FIG.

Finochrome duplex operation

For double-sided single-color printing of a narrow recording medium in duplex mode, as shown in Figure 3, the narrow e.g. A4-wide recording media, starting from the storage area 23, are fed to the transfer station 15 via the feed rollers 24 and printed on their top side with a front-side toner image. The front of the record carrier A is indicated by solid transport arrows, the underside by dashed transport arrows. The recording medium with the front-side toner image is then fed to the fixing station 18 and the front-side toner image is fixed. The recording medium is transported further via the guide rollers 21 to the deflection device 28, the deflection contour of which is positioned in a turning position. In the deflection device 28, the recording medium is turned with respect to its front and rear sides and is fed again via the feed rollers 24 to the transfer printing device 15 in such a way that its rear side can be provided with a rear side toner image. Thereafter, the recording medium is again fed to the fixing station 18 and the rear toner image is fixed, and then the recording medium printed on both sides is deposited in the stacking device 22.

Since the front and back toner images are generated at different times and printed on the recording medium, a corresponding data preparation via the printer control is necessary. For this purpose, the page memory SP contains memory areas VS for storing the front-side image data and memory areas RS for storing the rear-side image data. The data preparation takes place via the data control device DC, the data being supplied from a data source (HOST), for example an external data memory, via an interface of the data control device DC. The data of the individual pages to be printed are stored in the page memory SP and separated separately from the front VS and back. page RS in the corresponding memory areas. The data are then called up in a time-controlled manner so that the desired front-back assignment of the toner images on the recording medium is achieved.

Two-color duplex operation

The printing device is also suitable for multi-color printing. For this purpose, according to the illustration in FIG. 4, the developer station 14 can be designed such that it generates developer zones E1 and E2 which can be colored separately on the intermediate carrier Z. A corresponding developer zone E1 or E2 on the intermediate carrier Z is assigned to each position area of the narrow recording media as it passes through the transfer printing station 15. To generate these separately colored developer zones E1 and E2, two developer stations 14/1 and 14/2 arranged one behind the other can be assigned to the developer zones. The developer station 14/1 contains a toner mixture of a first color, e.g. red and the developer station 14/2 a developer mixture in a second color, e.g. black. The developer stations 14/1 and 14/2 are designed so that they can be activated separately with respect to the developer zones E1 and E2, either by mechanical flaps or the like or by electrical control of the developer rollers. Each of the developer stations 14/1 and 14/2 can extend over the entire width of the intermediate carrier 11, but it must be ensured that they can be controlled separately with respect to the developer zones E1 and E2. However, it is also possible to design each of the developer stations 14/1 and 14/2 as two developer stations arranged separately next to one another.

In order to be able to print a narrow recording medium with different colors on both sides, as shown in FIG. 4, the recording medium is guided through the printing device in the same way as in FIG. 3. In a first pass through the transfer printing station 15, a front image is applied in a first color, for example red, via the developer station 14/1 in the developer zone E2. In a second pass through the transfer station 15, after the turning process via the deflecting device 28, a back toner image in a second color, for example black, is applied via the developer station 14/2 in the developer zone E1. The control 3, via the printer control, the image data for the front toner image of color 1 (red) are stored in the memory area VF1 of the page memory SP and the image data for the rear toner image of color 2 (black) are stored in the memory area RF2.

It should be noted that the separate developer stations 14/1, 14/2 can also be used for double-sided single-color printing of the recording medium in duplex mode in accordance with FIG. 3. In this case, depending on the desired color, only one of the developer stations 14/1 or 14/2 is activated.

Two-tone SimplexJ? Etπeb

As shown in FIG. 5, it is possible with the printing device to print two colors on a narrow recording medium, for example A4 in width, on one side. For this purpose, the developer station can be constructed in the manner described in connection with FIG. 3. Each recording medium position on the transfer printing station is assigned a developer zone E1, E2 which can be colored separately. In a first pass through the transfer printing station 15, a toner image is printed over the developer zone E2 in a first color, e.g. red. The toner image of this first color is then fixed in the fixing station 18 and the recording medium is fed again without turning the transfer printing station 15 with the associated developer zone E1. The deflection device 28 is in an operating state as shown in FIG. 6, i.e. it is in a continuous position and the record carrier is shifted in width alone while maintaining the front-back-side assignment. During the second pass through the transfer printing station, a second toner image with the second color (for example black) is superimposed on the first fixed toner image with the first color (red) and a two-color overall image is thus generated. The superimposed toner image is then fixed again in the fixing station 18 and the recording medium printed on one side is deposited in the stacking device 22.

Instead of superimposing toner images, it is also possible to arrange differently colored toner images offset from one another on the recording medium.

The control of the toner image order is carried out as in the exemplary embodiments of FIGS. 3 and 4 via the printer control. The memory area VF1 of the page memory SP contains the image data of a front side image of color 1 (red) and the memory area VF2 of the page memory SP contains the image data of a front side color image of color 2 (black). The image data are called up and the developer station 14 is controlled in the manner described via the data control device DC.

Claims

claims

1. Document printing device with a tape-shaped recording medium (A) of a preselectable configuration processing paper feed device (E1.E2), - an electrographic printing device (DRU) coupled to the paper feed device (E1, E2) in a ready-to-use manner, which has means for printing the tape-shaped record carrier (A ) to be able to print on one and both sides, - a paper postprocessing device coupled on the output side to the electrographic printing device (DRU) with an associated printing page separating device (V), a buffer (ZS) for job-related recording of the separated printing pages and a job finishing device coupled to the buffer (JF) for the document-associated assembly of printed pages taken from the buffer (ZS) and a job organization control unit (JS) which controls the components of the document printing device as a function of an inputable document structure.

2. Document printing device according to claim 1, wherein the job organization control unit (JS) comprises: input means (P.SCH1, SCH2) for entering the document structure and a selection control coupled to the input means (P.SCH1.SCH2) and components of the document printing device (AS) in order to print the tape-shaped recording media (A.E1.E2) according to the configuration entered, depending on the document structure entered, in the separating device (V), in the buffer (ZS) and in the Merging the job finishing device (JF) into one document in accordance with the desired document structure.

3. Document printing device according to one of claims 1 or 2 with a functionally coupled job sequence control with components of the document printing device with means (C1.C2) for detecting the in the printer

(DRA) processed printed pages and the individual sheets stored in the buffer (ZS) and a comparison device (VG) which triggers an evaluation signal (Error.O.K.) Depending on the comparison process.

4. Document printing device according to one of claims 1 to 3, wherein the paper feed device (PZ) is designed to accommodate different supply rolls and / or stacks of the tape-shaped recording media.

5. Document printing device according to one of claims 1 to 4 with a separating device (V) having a cutting device with associated waste disposal device.

6. Document printing device according to one of claims 1 to 5, wherein the intermediate store (ZS) has the partial store assigned to the individual print jobs (T1-TN)

7. Document printing device according to one of claims 1 to 6 with a binding and / or binding device coupled to the job finishing device, joining documents.

8. Document printing device according to one of claims 1 to 7, wherein the printing device has a friction drive (8) for the tape-shaped recording medium (A).

9. A document printing device according to claim 8, having a paper feed device (PZ) that conveys the friction drive to the friction drive and that is configured in rolls and / or as stacked goods, the paper feed device (PZ) having:

a web pre-centering device (3) aligning the tape-shaped recording medium by positive guidance at an alignment edge, a device (6) increasing the tensile stress in the tape-shaped recording medium in the direction of the recording medium transport after the web centering device (3), such that the tape-shaped recording medium has a predetermined Assumes position in the friction drive (8), a web stabilizing device (9) stabilizing the record carrier run in a stabilization zone upstream of the friction drive (8) and a mechanical tape storage device (10) for the record carrier web.

10. A document printing device according to claim 9, wherein the web precentering device (3) has friction rollers (4) which are inclined relative to the recording medium transport direction and are in frictional contact with the recording medium.

11. A document printing device according to claim 9, wherein the tension-increasing device has a braking device (6) which brakes the recording medium web evenly over its width.

12. A document printing device according to claim 9, wherein the web stabilizing device has stabilizing rollers (9) wrapped around the recording medium and, if necessary, provided with a friction-increasing surface.

13. A document printing device according to claim 9, wherein the mechanical tape storage device has a loop puller (10).

14. Document printing device according to one of claims 1 to 13 with a single sheet feeder (EB) assigned to the intermediate store (ZS) for external loading of the intermediate store with prefabricated single sheets

15. A method for generating a document composed of individual sheets of a first recording medium configuration and / or further recording medium configurations with the following method steps: printing on tape-shaped recording media (A.E1.E2) assigned to the different recording medium configurations in an electrographic see printing device (DRA), which is suitable for printing the tape-shaped record carrier (s) on one or both sides,

Separation of the tape-shaped recording media and configuration-assigned storage of the individual sheets in partial memories (T1-TN) of a buffer (ZS), document-associated assembly of individual sheets taken from the buffer to form a document.