EP0857322B1 - Procede permettant de faire fonctionner une imprimante electrographique pour l'utilisation de formulaires de differentes longueurs - Google Patents

Procede permettant de faire fonctionner une imprimante electrographique pour l'utilisation de formulaires de differentes longueurs Download PDF

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Publication number
EP0857322B1
EP0857322B1 EP96920777A EP96920777A EP0857322B1 EP 0857322 B1 EP0857322 B1 EP 0857322B1 EP 96920777 A EP96920777 A EP 96920777A EP 96920777 A EP96920777 A EP 96920777A EP 0857322 B1 EP0857322 B1 EP 0857322B1
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EP
European Patent Office
Prior art keywords
web
transport
transfer
length
fold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96920777A
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German (de)
English (en)
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EP0857322A1 (fr
Inventor
Edmund Creutzmann
Hans Winter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Production Printing Germany GmbH and Co KG
Original Assignee
Oce Printing Systems GmbH and Co KG
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Application filed by Oce Printing Systems GmbH and Co KG filed Critical Oce Printing Systems GmbH and Co KG
Priority to EP96920777A priority Critical patent/EP0857322B1/fr
Publication of EP0857322A1 publication Critical patent/EP0857322A1/fr
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Publication of EP0857322B1 publication Critical patent/EP0857322B1/fr
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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6517—Apparatus for continuous web copy material of plain paper, e.g. supply rolls; Roll holders therefor
    • G03G15/6526—Computer form folded [CFF] continuous web, e.g. having sprocket holes or perforations
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/23—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 specially adapted for copying both sides of an original or for copying on both sides of a recording or image-receiving material
    • G03G15/231—Arrangements for copying on both sides of a recording or image-receiving material
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00443—Copy medium
    • G03G2215/00451—Paper
    • G03G2215/00455—Continuous web, i.e. roll
    • G03G2215/00459—Fan fold, e.g. CFF, normally perforated
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00919—Special copy medium handling apparatus
    • G03G2215/00924—Special copy medium handling apparatus two or more parallel feed paths

Definitions

  • the invention relates to a method for operating a electrographic printer, in which a first and a second Web section of a web of an endless carrier material which can be folded in sheets with the specified form length at the Transfer location of an intermediate image carrier passed and can be printed at the same time.
  • the invention is concerned with a further development of a electrographic printing device for printing on band-shaped Recording media of different bandwidth WO 94/27193.
  • the printing device described there has an electrographic intermediate carrier, for example a photoconductor drum, with a usable width accordingly the double width format of a standard form according to A4.
  • the other units are also like that Fuser, developer station, cleaning station etc. designed for this usable width.
  • single-color duplex operation becomes the path of the record carrier during transport turned by the printing device, so that two web sections result:
  • the first line section is the Front of the web of the transfer location of a transfer station opposite, while in a second section of the track the back printed on the web at the same transfer location at the same time becomes.
  • the two-tone simplex mode becomes the web during transport in the printing facility offset in parallel by at least one track width, and the offset Path sections are put together in juxtaposition passed the transfer location.
  • the first time you walk by The web at the transfer location becomes picture and text elements printed with a first color; on the second pass the web with offset becomes picture and text elements printed with the second color.
  • the parallel in the printer offset or offset in parallel and additionally turned Transfer point of the printing unit fed again and printed is to ensure that when printing at the same time the adjacent track sections of the track on the Transfer location the print locations on the web in a fixed predetermined Are related to each other. This firm relationship must be observed during the entire printing process, otherwise there is an undesirable shift in the printed image.
  • form length When using a continuous carrier sheet folded in sheets, which is also known as fan-fold carrier material the form length is in the transport direction through the Distance between two successive folds defined.
  • the form lengths are worldwide in inches or fractions thereof defined - figures in metric units are unusual. in the the following are therefore, as in the field of printing technology common practice, form lengths are given in inches; on inch has a length of 25.4 mm. In practice, e.g. Form lengths from 12 inch, 12 1/2 inch, 12 1/6 inch, 12 2/6 inch etc. before.
  • the endless carrier material which can be folded in sheets, it contains transport holes at its edges which are at a distance of 3/6 inch from one another.
  • Transport spikes of a transport device arranged near the photoconductor reach into these transport holes. These transport spikes are also 3/6 inch apart.
  • the folds of the web are arranged between the transport holes, which reduces the risk of a sheet being torn out.
  • the fold is preferably arranged centrally between two transport holes. If the web has a form length that is an integral multiple of 1/2 inch, all the folds are in the middle between two transport holes.
  • the two web sections lying next to one another in the printer are guided past the transfer location of the photoconductor using a transport device.
  • a transport device In the case of webs with off-center form lengths F L1 or F L2 it can now happen that two folds come to lie side by side, the position of which is different from one another between the transport holes.
  • the folds of the adjacent web sections then do not align, with the result that sheets of the two web sections have different starting positions when viewed in the transport direction.
  • measures must be taken to prevent an undesired shift in the print image.
  • the length L of the web is influenced from transfer location to transfer location to achieve the object.
  • a second aspect of the invention when inserting of the two sections of the web that align themselves sheet by sheet leave the resulting small fold spacing in the transport direction. Rather, it acts on the generation of the toner images and this on the photoconductor, for example on the photoconductor drum, electronically generated toner image for one Web section by the fold distance from the toner image for moved the other section of the track.
  • This print image offset around the fold distance is again determined from the residual value R, which results from the quotient n1 / 3 or n2 / 3 according to the relationships given above. Due to the print offset it is again possible that the individual leaves of the The web is printed on the right side starting with the beginning of the sheet become.
  • the folds of the opposite Path sections are not exactly aligned with each other in duplex mode and in two-color simplex mode no print offset.
  • the transport device to compensate for a possibly occurring Fold distance acted in the transport direction.
  • the transport device is in a first transport unit for the first track section and a second transport unit for the second track section divided.
  • the two Transport units detached from each other, so that the folds of the adjacent track sections aligned with each other can be.
  • both transport units again rotatably coupled to each other to the printing operation start.
  • FIG. 1 shows a schematic representation of the transport path of the web 10 through the printer.
  • the folded web 10 with folds 12 is pulled off a stack 16.
  • the distance between the folds 12 defines the form length F L of a sheet.
  • the form lengths F L in the field of printer technology are usually given in "inches" and fractions thereof, for example 1/6 inch; one inch is 25.4 mm long.
  • This transport device 20 guides the web 10 with a first web section A at a transfer location 22 a printing unit 24 past.
  • the printer used here works on the principle of Electrophotography, with a photoconductor drum as the intermediate carrier 26 is used on the using a light source 28, for example a laser or an LED line, a latent charge image corresponding to the one to be printed Print image is applied.
  • This charge image is made using a developer station 30 converted into a toner image, wherein this developer station 30 color particles of a desired Transfers color to the photoconductor drum 26.
  • At the transfer location 22 becomes the toner image under the influence of a corona discharge transferred to the surface of the web section A, i.e. on the front of the web 10.
  • the now smearable Toner image on the web section A is by a Fusing station 32 transported and there using pressure and temperature smudge-proof with the carrier material of the web 10 connected.
  • the web section A is then on a further deflection unit 34 deflected and reaches a turning station 36, in the the web 10 laterally offset by at least one web width and is turned so that now the back of the web 10th the transfer point 22 can be supplied.
  • the section of the Web 10 after turning is referred to as web section B.
  • the web section B is also printed at the transfer printing point 22 and then passed through the fuser 32. After passing through the fixing station 32 twice the web 10 arrives at an output roller 38 and from there an output stack 40 where they are folded in a sheet State is filed. Further details of the construction of the Printers are described in the aforementioned WO 94/27193, whose content corresponds to the present disclosure content of the Invention is attributable.
  • Turning station 36 is replaced by a transfer station, which the web 10 without turning it by at least one web width transferred.
  • the other processes agree with those for the duplex operation described here.
  • the web section B passes through a Web loop 41 of defined length.
  • the web loop 41 forms a web storage and serves that the web section B fed to the transport device 20 free of tensile stresses becomes.
  • the transport device 20 comprises a first transport unit 20a for the first path section A and a second Transport unit 20b for the second web section B.
  • Both Transport units 20a, 20b are during the printing operation coupled to one another in a rotationally fixed manner. This ensures that both track sections A, B at the same speed be transported forward, the one in the insert mode alignment of the two path sections A, B at any time is maintained. May be during insertion the rotary connection of the two in certain operating modes Transport units 20a, 20b are released, so that a rail transport of the second path section B even when it is at a standstill of the first path section A can take place. Different operating modes with coupled and decoupled transport units 20a, 20b are explained below.
  • the transport device 20 comprises caterpillar units (not shown) with transport spikes in transport holes on Intervene at the edge of the web 10. After inserting the web 10 flaps (not shown) are folded over their edges, which they with the transport holes firmly on the transport spikes hold. This type of transport mechanism for foldable Railways is well known and will not be discussed here explained.
  • FIG. 2 shows the position of the folds 12 with different form lengths F L.
  • a web 10 is shown, of which four sheets or pages 1 to 4 are to be examined in more detail.
  • the beginning of page 1 is formed by a fold 12, which coincides with a center line M between two successive transport holes 42 (for reasons of clarity, only one transport hole is provided with the reference symbol 42).
  • the fold 12 at the end of the side 1 also coincides with the center line M between two transport holes 42, ie the fold 12 of the following side 2 is arranged centrally between two transport holes 42 as in the case of page 1. Accordingly, the folds 12 for the following pages 3 and 4 are also arranged centrally between the transport holes 42 as seen in the transport direction.
  • the fold 12 at the beginning of page 1 coincides with the center line M.
  • the fold 12 at the end of the page 1 is shifted to the right by 1/6 inch relative to the center line M, that is to say it is arranged off-center by 1/6 inch.
  • the following page 2 is delimited at its end by a fold 12 which is shifted to the left by 1/6 inch with respect to the center line M.
  • the fold 12 at the end of page 3 again coincides with the center line M.
  • the following page 4 has fold layers like page 1.
  • at least one side has a fold 12 at its beginning, which is arranged centrally between two transport holes 42.
  • the fold 12 is arranged at the beginning of the side 1 in the middle between two transport holes 42. Due to the form length F L2 , the fold 12 at the end of page 1 is shifted 1/6 inch from the center line M to the left. The fold 12 at the end of the subsequent page 2 is arranged shifted 1/6 inch to the right outside the center line M. The fold at the end of the following page 3 again coincides with the center line M.
  • the side 4 has a fold position like the side 1. It can be seen that in this example too the fold 12 is arranged at the beginning of at least one side of three successive sides in the middle between two transport holes 42 of the web 10. The fold layers are repeated at three-sided intervals; the local period is therefore three pages or three leaves.
  • the web 10 is transported through the printer in such a way that it is offset and, if necessary, additionally turned, so that it passes with a first toner image on the transfer point 22 when it passes by for the first time and on the second time it passes the transfer point 22 is provided with a second toner image, it can happen with the off-center form lengths F L1 and F L2 that the folds 12 of the adjacent web sections A, B are not exactly aligned with one another. If no further measures were taken, the toner images, viewed in the transport direction, can differ from one another by ⁇ 1/6 inch with respect to a sheet start or a start of web section A compared to those of web section B.
  • the length L of the web 10 is adjusted from the transfer location 22 to the transfer location 22 such that the folds 12 of the web 10 for the form lengths F L1 and F L2 are aligned with one another at the transfer location 12.
  • This web store 41 thus has a double function: on the one hand, it should serve for a certain compensation in the case of length tolerances of the form lengths F L of the web 10 as a result of shrinkage or other length changes; on the other hand, it should accommodate a sufficient number of pages with off-center form lengths F L1 and F L2 in order to allow the folds 12 of the adjacent web sections A and B to be aligned at the transfer printing point 22.
  • L DS L DSMIN
  • the required web loop is minimal in the web store 41; the web store 41 can are designed to be correspondingly small in capacity.
  • the small fold spacing of the adjacent web sections A and B is maintained at the transfer location 22 in the transport direction.
  • the individual pages of the web sections A and B are printed sheet by sheet with toner images, the position of which relative to one another is precisely defined.
  • the toner images should have a defined position at the top of each page. Due to the fold spacing for off-center form lengths F L1 and F L2 , this positional relationship cannot be exactly maintained without additional measures. It is therefore provided according to the invention that the second toner image assigned to the second web section B is printed over the fold distance from the first toner image assigned to the first web section A.
  • the procedure is such that web section A is first inserted while web 10 is being inserted.
  • a fold 12 which coincides with a center line M, then lies against a marking M D which is assigned to the form length F L1 or F L2 used .
  • the web section B is then inserted and guided past the transfer printing point 22. As can be seen in the left part of the figure in FIG.
  • the toner image for web section B is now also shifted by +1/6 inch and transferred sheet by sheet to web section B.
  • the offset of the toner image by the fold distance generally takes place when the charge image is applied.
  • the charge image for an entire side of the web section B is accordingly generated a time T earlier than for the web section A, for example by writing on the photosensitive surface of the photoconductor drum 26 by the laser beam or by the LED line. This time T is calculated from the fold distance divided by the peripheral speed of the photoconductor drum or the transport speed during printing.
  • the fold spacing or the print image offset is -1/6 inch for the form length F L1 in the transport direction; for F L2 it is +1/6 inch.
  • the fold offset or the fold spacing in the transport direction can be compensated for eccentric form lengths F L1 or F L2 by moving the web sections A, B relative to one another before the start of the printing operation, so that the Folds 12 of the adjacent web sections A, B are aligned.
  • the transport device 20 is divided into a first transport unit 20a for the first web section A and a second transport unit 20b for the second web section B (cf. FIG. 1). After the insertion of the web section A into the transport device 20, the web 10 is transported through the printer so that the web section B can be inserted into the transport unit 20b, whereby sheets of the web sections A and B lying side by side are aligned.
  • a fold offset or a fold spacing can occur when viewed in the transport direction. If the fold distance differs from 0, the rotary connection of the two transport units 20a, 20b is released and the second web section B is transported by web relative to the first web section A by this fold distance, the web 10 of the web section A being stationary. After compensation of the fold spacing in such a way that the opposing folds 12 of the web sections A and B are aligned with one another, the transport units 20a, 20b are coupled to one another in a rotationally fixed manner for the printing operation.
  • the transport device 20 can be designed in such a way that the two transport units 20a, 20b can only be rotated by these values. This twisting can be done manually by an operator or automatically by the printer controller.
  • the rail transport of rail section B is determined depending on the residual value R.
  • n1 is the rounded integer from L / F L1
  • n2 is the rounded integer from L / F L2 , with L the length of web 10 from transfer location 22 to transfer location 22.
  • the state for the form length F L1 after inserting the web section A and the web section B is shown in the upper left part of the picture. Viewed in the direction of transport, there is a fold spacing or fold offset of +1/6 inch.
  • the rotary connection of the transport units 20a, 20b is now released and the transport unit 20b is adjusted by -1/6 inch with respect to the stationary transport device 20a. The result can be seen in the lower left part of the picture.
  • the folds 12 of the adjacent web sections A and B are now aligned with one another, so that the toner images on both web sections A, B can be re-printed simultaneously with uniform alignment to the beginning of the page.
  • the fold spacing or the fold offset by -1/6 inch for the form length F L2 after inserting the two web sections A and B is shown.
  • the two transport units 20a, 20b are then coupled in a rotationally fixed manner and the printing operation can begin.
  • the transport units 20a, 20b After the transport units 20a, 20b have been adjusted, they are connected to one another in a rotationally fixed manner and the printing operation is started.

Claims (17)

  1. Procédé pour faire fonctionner une imprimante électrographique, dans lequel on fait passer un premier segment (A) d'une bande (10) d'une matière support sans fin, pouvant être pliée en feuilles et possédant une longueur de formulaires prédéterminée, au droit de la zone de report (22) d'un support d'image intermédiaire (26), puis la bande (10) est transportée à travers l'imprimante et, en même temps, déportée et éventuellement en plus retournée, de sorte qu'un deuxième segment de bande déporté (B) est entraíné pour passer au droit de la zone de report (22 ) du support d'image intermédiaire (26), conjointement et en juxtaposition avec le premier segment de bande (A), et dans un même plan,
    dans lequel chaque feuille de la bande (10) est imprimée avec une première image de toner lors du premier passage au droit du support d'image intermédiaire (26), et avec une deuxième image de toner, qui possède une position définie par rapport à la première image de toner, lors d'un nouveau passage au droit de la zone de report (22),
    et dans lequel le transport des premier et deuxième segments de bande (A, B) est assuré par un dispositif de transport (20) agencé près du support d'image intermédiaire (26) et muni de picots de transport qui sont en prise avec des trous de transport (42) de la bande (10) et qui se déplacent à une vitesse concordante,
    dans lequel les trous de transport (42) ont entre eux un espacement de 3/6 x LE dans la direction du transport, LE étant une unité de longueur typique pour des longueurs de formulaires, et le pli (12) d'au moins une feuille de trois feuilles successives étant disposé au milieu entre deux trous de transport (42) de la bande (10),
    caractérisé en ce que, pour une longueur de formulaires FL1 = (k x 1/2 + 1/6) x LE ou FL2 = (k x 1/2 + 2/6) x LE, où k est en un nombre entier naturel, la longueur L de la bande (10), de zone de report (22) à zone de report (22), est réglée de telle manière que le quotient n1/3 ou n2/3 donne un reste R = 0, où n1 est la valeur numérique entière arrondie de L/FL1 et n2 est la valeur numérique entière arrondie de L/FL2.
  2. Procédé selon la revendication 1, caractérisé en ce que, dans son transport de zone de report (22) à zone de report (22), la bande (10) traverse un accumulateur de bande (41) dont la capacité vaut au moins 2 FL1 ou 2 FL2.
  3. Procédé selon la revendication 2, caractérisé en ce que l'accumulateur de bande (41) est préréglé sur une valeur minimum LDSMIN.
  4. Procédé selon la revendication 3, caractérisé en ce que, pour un trajet de transport LUU de zone de report (22) à zone de report (22), la capacité LDS de l'accumulateur de bande (41) est réglé en fonction du reste entier R du quotient x1/3 ou x2/3, où x1 est la valeur numérique entière arrondie de (LUU + LDSMIN) /FL1 et x 2 est la valeur numérique entière arrondie de (LUU + LDSMIN)/FL2, où , pour R = 0, la capacité est LDS = LDSMIN, pour R = 1, la capacité est LDS = LDSMIN + 2FL1 ou LDS = LDSMIN + 2FL2 et, pour R = 2, la capacité est LDS = LDSMIN + FL1 ou LDS = LDSMIN + FL2.
  5. Procédé pour faire fonctionner une imprimante électrographique, dans lequel on fait passer un premier segment (A) d'une bande (10) d'une matière support sans fin, pouvant être pliée en feuilles et possédant une longueur de formulaires prédéterminée, au droit de la zone de report (22) d'un support d'image intermédiaire (26), puis la bande (10) est transportée à travers l'imprimante et, en même temps, déportée et éventuellement en plus retournée, de sorte qu'un deuxième segment de bande déporté (B) est entraíné pour passer au droit de la zone de report (22 ) du support d'image intermédiaire (26), conjointement et en juxtaposition avec le premier segment de bande (A), et dans un même plan,
    dans lequel les plis (12) des feuilles des segments de bande (A, B) juxtaposés sont alignés les uns par rapport aux autres ou ont entre eux un petit espacement de plis dans la direction du transport,
    dans lequel le transport des premier et deuxième segments de bande (A, B) est assuré par un dispositif de transport (20) agencé près du support d'image intermédiaire (26) et muni de picots de transport qui sont en prise avec des trous de transport (42) de la bande (10) et qui se déplacent à une vitesse concordante,
    et dans lequel les trous de transport (42) ont entre eux un espacement de 3/6 x LE dans la direction du transport, LE étant une unité de longueur typique pour des longueurs de formulaires, et le pli (12) d'au moins une feuille de trois feuilles successives étant disposé au milieu entre deux trous de transport (42) de la bande (10), et chaque feuille de la bande (10) étant imprimée avec une première image de toner lors du premier passage au droit du support d'image intermédiaire (26) et avec une deuxième image de toner, qui possède une position définie par rapport à la première image de toner, lors d'un nouveau passage au droit de la zone de report (22),
    caractérisé en ce que la première image de toner est reportée dans une position qui est déportée par rapport à la deuxième image de toner d'un espacement entre plis calculé en fonction d'un reste R,
    qui, pour une longueur de formulaires FL1 = (k x 1/2 + 1/6) x LE ou FL2 = (k x 1/2 + 2/6) x LE, où k est en un nombre entier naturel, est donné par le quotient n1/3 ou n2/3, où n1 est la valeur numérique entière arrondie de L/FL1 et n2 est la valeur numérique entière arrondie de L/FL2, et L est la longueur de la bande (10) de zone de report (22) à zone de report (22).
  6. Procédé selon la revendication 5, caractérisé en ce que, pour un reste R = 0, l'espacement des plis est 0.
  7. Procédé selon la revendication 5, caractérisé en ce que, pour un reste R =1, l'espacement des plis pour la longueur de formulaires FL1 est égal à 1/6 x LE, tandis que, pour la longueur de formulaires FL2, il est égal à -1/6 x LE.
  8. Procédé selon la revendication 5, caractérisé en ce que, pour un reste R = 2, l'espacement des plis pour une longueur de formulaires FL1 est égal à -1/6 x LE, tandis que, pour une longueur de formulaires FL2, il est égal à +1/6 x LE.
  9. Procédé selon une des revendications précédentes 5 à 8, caractérisé en ce que l'image de charge, présente sur le support d'image intermédiaire (26) et destinée à produire une image de toner sur le deuxième segment de bande (B), est produite avec un décalage, par rapport à l'image de charge pour l'image de toner du premier segment de bande (A), d'un temps T qui est donné par l'espacement des plis divisé par la vitesse de transports pendant l'impression.
  10. Procédé pour faire fonctionner une imprimante électrographique, dans lequel on fait passer un premier segment (A) d'une bande (10) d'une matière support sans fin pouvant être pliée en feuilles et possédant une longueur de formulaires prédéterminée, au droit de la zone de report (22) d'un support d'image intermédiaire (26), puis la bande (10) est transportée à travers l'imprimante et, en même temps, déportée et éventuellement en plus retournée, de sorte qu'un deuxième segment de bande déporté (B) est entraíné pour passer au droit de la zone de report (22 ) du support d'image intermédiaire (26) conjointement et en juxtaposition avec le premier segment de bande (A), et dans un même plan, dans lequel les plis (12) des feuilles des segments de bande (A, B) juxtaposés sont alignés les uns par rapport aux autres ou ont entre eux un petit espacement de plis dans la direction du transport,
    et dans lequel le transport des premier et deuxième segments de bande (A, B) est assuré par un dispositif de transport (20) agencé près du support d'image intermédiaire (26) et muni de picots de transport qui sont en prise avec des trous de transport (42) de la bande (10) et qui se déplacent à une vitesse concordante,
    les trous de transport (42) ayant entre eux un espacement de 3/6 x LE dans la direction du transport, où LE est une unité de longueur typique pour des longueurs de formulaires, et le pli (12) d'au moins une feuille de trois feuilles successives étant disposé au milieu entre deux trous de transport (42) de la bande (10), et chaque feuille de la bande (10) étant imprimée avec une première image de toner lors du premier passage au droit du support d'image intermédiaire (26) et avec une deuxième image de toner, qui possède une position définie par rapport à la première image de toner, lors d'un nouveau passage au droit de la zone de report (22),
    et le dispositif de transport (20) comprenant une première unité de transport (20a) pour le premier segment de bande (A), et une deuxième unité de transport (20b) pour le deuxième segment de bande (B),
    caractérisé en ce que la liaison en rotation des deux unités de transport (20a, 20b) est supprimée pendant l'opération de mise en place, et il se produit un transport de bande du deuxième segment de bande (B) par rapport au premier segment de bande (A) d'une longueur égale à l'espacement des plis, et en ce que, ensuite, les deux unités de transport (20a, 20b) sont couplées solidairement en rotation entre elles pour le fonctionnement en impression, avec une impression simultanée sur les segments de bande (A, B).
  11. Procédé selon la revendication 10, caractérisé en ce que le transport de bande du deuxième segment de bande (B) s'effectue pendant l'arrêt du premier segment de bande (A).
  12. Procédé selon une des revendications précédentes 10 ou 11, caractérisé en ce que le transport de bande est déclenché automatiquement par la commande de l'imprimante.
  13. Procédé selon une des revendications précédentes 10 ou 11, caractérisé en ce que le transport de bande est calculé en fonction d'un reste entier R qui, pour une longueur de formulaires FL1 = (k x 1/2 + 1/6) x LE ou FL2 = (k x 1/2 + 2/6) x LE où k est un nombre entier naturel, est donné par le quotient n1/3 ou n2/3, où n1 est la valeur numérique entière arrondie de L/FL1 et n2 est la valeur numérique entière arrondie de L/FL2, et L est la longueur de la bande (10) de zone de report (22) à zone de report (22).
  14. Procédé selon la revendication 13, caractérisé en ce que, pour un reste R =1, l'espacement des plis pour la longueur de formulaires FL1 est égal à 1/6 x LE, tandis que, pour la longueur de formulaires FL2, il est égal à -1/6 x LE.
  15. Procédé selon la revendication 13, caractérisé en ce que, pour un reste R = 2, l'espacement des plis pour une longueur de formulaires FL1 est égal à -1/6 x LE, tandis que, pour une longueur de formulaires FL2, il est égal à +1/6 x LE.
  16. Procédé selon une des revendications précédentes 1 à 15, caractérisé en ce que l'unité de longueur LE est de 25,4 mm (1 pouce).
  17. Procédé selon une des revendications précédentes 1 à 16, caractérisé en ce qu'on utilise un photoconducteur (26) en tant que support d'image intermédiaire.
EP96920777A 1995-10-27 1996-06-03 Procede permettant de faire fonctionner une imprimante electrographique pour l'utilisation de formulaires de differentes longueurs Expired - Lifetime EP0857322B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP96920777A EP0857322B1 (fr) 1995-10-27 1996-06-03 Procede permettant de faire fonctionner une imprimante electrographique pour l'utilisation de formulaires de differentes longueurs

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP95116972 1995-10-27
EP95116972 1995-10-27
PCT/EP1996/002397 WO1997016767A1 (fr) 1995-10-27 1996-06-03 Procede permettant de faire fonctionner une imprimante electrographique pour l'utilisation de formulaires de differentes longueurs
EP96920777A EP0857322B1 (fr) 1995-10-27 1996-06-03 Procede permettant de faire fonctionner une imprimante electrographique pour l'utilisation de formulaires de differentes longueurs

Publications (2)

Publication Number Publication Date
EP0857322A1 EP0857322A1 (fr) 1998-08-12
EP0857322B1 true EP0857322B1 (fr) 2001-01-17

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EP96920777A Expired - Lifetime EP0857322B1 (fr) 1995-10-27 1996-06-03 Procede permettant de faire fonctionner une imprimante electrographique pour l'utilisation de formulaires de differentes longueurs

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Country Link
EP (1) EP0857322B1 (fr)
DE (1) DE59606350D1 (fr)
WO (1) WO1997016767A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004029943A1 (de) * 2004-06-21 2006-01-26 OCé PRINTING SYSTEMS GMBH Drucker oder Kopierer zum Bedrucken eines endlosen Trägermaterials mit Querfalzen sowie Verfahren zum Steuern eines solchen Druckers oder Kopierers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5884782A (ja) * 1981-11-13 1983-05-20 Fujitsu Ltd 連続媒体の自動装填装置
EP0572050B1 (fr) * 1989-12-13 1998-01-21 Océ Printing Systems GmbH Appareil d'impression Electrofotographique pour l'impression sur les deux faces d'une bande de papier sans fin, comprenant une unité de fixage thermique
US5019872A (en) * 1990-06-08 1991-05-28 Output Technology Corporation Continuous-form electrophotographic printer
JPH04321062A (ja) * 1991-04-22 1992-11-11 Hitachi Koki Co Ltd 連続印刷用紙の両面印刷装置
JP2576299Y2 (ja) * 1992-01-14 1998-07-09 旭光学工業株式会社 プリンタ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004029943A1 (de) * 2004-06-21 2006-01-26 OCé PRINTING SYSTEMS GMBH Drucker oder Kopierer zum Bedrucken eines endlosen Trägermaterials mit Querfalzen sowie Verfahren zum Steuern eines solchen Druckers oder Kopierers
DE102004029943B4 (de) * 2004-06-21 2006-04-27 OCé PRINTING SYSTEMS GMBH Drucker oder Kopierer zum Bedrucken eines endlosen Trägermaterials mit Querfalzen sowie Verfahren zum Steuern eines solchen Druckers oder Kopierers

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Publication number Publication date
EP0857322A1 (fr) 1998-08-12
WO1997016767A1 (fr) 1997-05-09
DE59606350D1 (de) 2001-02-22

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