EP0857323B1 - Procede permettant de faire fonctionner une imprimante electrographique pour l'impression simultanee de deux sections adjacentes d'une bande - Google Patents

Procede permettant de faire fonctionner une imprimante electrographique pour l'impression simultanee de deux sections adjacentes d'une bande Download PDF

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Publication number
EP0857323B1
EP0857323B1 EP96922881A EP96922881A EP0857323B1 EP 0857323 B1 EP0857323 B1 EP 0857323B1 EP 96922881 A EP96922881 A EP 96922881A EP 96922881 A EP96922881 A EP 96922881A EP 0857323 B1 EP0857323 B1 EP 0857323B1
Authority
EP
European Patent Office
Prior art keywords
web
section
transport
web section
printing
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
EP96922881A
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German (de)
English (en)
Other versions
EP0857323A1 (fr
Inventor
Edmund Creutzmann
Gerhard Klapettek
Walter Kopp
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oce Printing Systems GmbH and Co KG filed Critical Oce Printing Systems GmbH and Co KG
Priority to EP96922881A priority Critical patent/EP0857323B1/fr
Publication of EP0857323A1 publication Critical patent/EP0857323A1/fr
Application granted granted Critical
Publication of EP0857323B1 publication Critical patent/EP0857323B1/fr
Anticipated expiration legal-status Critical
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/20—Advancing webs by web-penetrating means, e.g. pins
    • 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, when you insert a Endless substrate in the printer a first Track section and a second track section of a track in defined positional relationship to each other.
  • the invention is concerned with a further development of a electrographic printing device for printing on tape-shaped recording media different Bandwidth according to WO 94/27193.
  • the one described there Printing device has an electrographic working Intermediate carrier, for example a photoconductor drum, with a usable width corresponding to twice Width format of a standard form according to A4.
  • the other units such as the fuser, the Developer station, the cleaning station etc. on this usable width.
  • the monochrome Duplex operation In another operating mode, the monochrome Duplex operation, the path of the record carrier at Transport turned through the printing device, so that two track sections result: In a first track section is the front of the web of the transfer printing one Printing unit opposite while a second Track section the back of the track on the same Transfer location is printed at the same time.
  • a first track section is the front of the web of the transfer printing one Printing unit opposite while a second Track section the back of the track on the same Transfer location is printed at the same time.
  • the train is transported in the Printing device parallel by at least one web width offset, and the offset path sections are in Juxtaposition together at the transfer location passed by.
  • the first time the train passes the The transfer point becomes the image and text elements with a first Color printed; on the second pass with misalignment image and text elements are 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 given relationship to each other. This fixed Relationship must be maintained throughout printing otherwise an undesirable result Print image shift.
  • the transport of the web which is in two track sections at the transition point between not staggered and staggered path, by Means of transport of a device that is engaged stand with the train and who are in printing with move at approximately the same speed.
  • the path length is a device constant of the Printer and the printer control known.
  • the Printer control can be based on this web length and knowledge about the web feed or the transport speed Locations of the first track section the locations of the precisely assign the second web section and thus the printing operation for the first track section and the second track section coordinate.
  • the printer controller when inserting the web in the Printer the leading edge or a fold of the first and the second web section created at the same insertion mark.
  • the printer controller can with a given form length of the web for both Path sections the beginning of each sheet of the path determine and thus control the printing operation sheet accurate.
  • the invention can be used for a folded sheet of fan-fold paper as well as for an unfolded roller conveyor be used in which the sheets are not folded are separated.
  • the operator places a roller conveyor preferably a front portion of the web.
  • the the resulting fold-over edge then forms the front edge, which is placed on the insert mark.
  • the invention can be used for the one explained above Duplex operation can be used, in which the only web at Transport through the printer offset and turned in parallel and the back of the web at the transfer location along with is led past the front of the web.
  • Duplex operation in which the only web at Transport through the printer offset and turned in parallel and the back of the web at the transfer location along with is led past the front of the web.
  • the invention for the two-tone Simplex operation possible, in which only an offset of the Track done without turning.
  • the offset and, if necessary, turned over second track section before reaching the transport device by a Web store performed preferably a web loop forms a predetermined length.
  • This web loop is used for Compensation of tensile stresses when transporting the train through the printer due to shrinkage processes Heat treatment or length variations of the web during Forward transport can occur.
  • Another development provides that a fold of the first Web section and a fold of the second web section a common starting position with a predetermined starting distance is transported in front of the transfer location.
  • This start route is dimensioned so that the beginning of each sheet of the the two web sections are exactly opposite the transfer location, if the printer was using its during printing Has reached speed. So the starting distance is fulfilled the function of an acceleration path at the start of the Printing company.
  • a preferred further development is characterized in that the transport device is a first transport unit for the first track section and a second transport unit for the includes second track section, and that both Transport units during printing with simultaneous pressure on the two web sections are rotatably coupled together.
  • the transport device is a first transport unit for the first track section and a second transport unit for the includes second track section, and that both Transport units during printing with simultaneous pressure on the two web sections are rotatably coupled together.
  • the to printing web is a folded (fan-fold) paper web.
  • Figure 1 is a schematic representation of the Transport path of the web 10 shown by the printer.
  • the folded web 10 with folds 12, 14 is from a stack 16 deducted.
  • the distance between the folds 12, 14 is defined the form length of a sheet, which in the present case is a 12 inch form.
  • the form lengths will be in the field of printer technology usually in "inch” and Fractions thereof, e.g. 1/6 inch, specified; an inch has it Length 25.4 mm.
  • This transport device 20 leads the web 10 with a, first web section A on one Transfer printing point 22 of a printing unit 24 over.
  • the printer used here works on the principle of Electrophotography, in which a Photoconductor drum 26 is used on the using a Light source 28, for example a laser or an LED line, a latent charge image corresponding to that printing printed image is applied. This charge image is converted into a toner image using a developer station 30 converted, this developer station 30 color particles a desired color on the photoconductor drum 26 transmits. At the transfer location 22, the toner image is under Influence of a corona discharge on the surface of the Transfer section A, i.e. to the front of the Lane 10. The now smearable toner image on the Web section A is through a fixing station 32nd transported and there using pressure and temperature wipe-proof connected to the carrier material of the web 10.
  • the track section A is then on another Deflected unit 34 deflected and gets into a turning station 36, in which the web 10 laterally by at least one web width is moved and turned, so that now the back of the Web 10 can be fed to the transfer printing station 22.
  • the Section of the web 10 after turning is called the web section B designated.
  • Railway section B is also on the Transfer printing 22 printed and then by the Fixing station 32 out. After the two runs through the fixing station 32 the web 10 arrives at a Output roller 38 and from there to an output stack 40 where it is stored in a folded state. Further details of the construction of the printer are in the WO 94/27193 mentioned above, the content of which attributable to the present disclosure content of the invention is.
  • the web section B passes through a Web loop 42 of defined length.
  • the web loop 42 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 one Transport unit 20a for the first web section A and a second transport unit 20b for the second Track section B. Both transport units 20a, 20b are coupled in a rotationally fixed manner during the printing operation. This ensures that both web sections A, B with be transported forward at the same speed, whereby the alignment of the two carried out in the insert mode Path sections A, B is maintained at all times.
  • the Inlay mode can be used in certain operating modes Rotary connection of the two transport units 20a, 20b released be so that a web transport of the second web section B also take place when the first web section A is at a standstill can. Different modes with coupled and decoupled transport units 20a, 20b are shown below explained.
  • the transport device 20 includes an upper track unit 44 and a lower one Track unit 46.
  • the track units 44, 46 have as in Figure 2 indicated transport spikes in transport holes Intervene at the edge of the web 10. After inserting the web are 10 flaps over the edges of the web (not shown) folded, which the web 10 with the Hold the transport holes firmly on the transport spikes.
  • insertion marks M EA , M EB are provided on both sides of a web guide for web sections A and B, which are aligned with one another in a line transverse to web sections A, B.
  • the front edge or a fold 12 of the web section A and a front edge or a fold 12 of the web section B are applied to the insertion marks M EA or M EB .
  • the insertion marks M EA , M EB are arranged outside the area of the caterpillar units 44, 46, so that a perfect transport is ensured for all commonly occurring form lengths, since the transport spikes over the full length of the respective caterpillar unit 44, 46 into the transport holes of the web sections A , B are immersed.
  • the position of the M EA or M EB insert marks is independent of the form length of the form used.
  • the insertion of the web sections A, B into the lower track unit 46, which is difficult to access from the outside, is facilitated by an insertion rocker 48.
  • the web section A according to FIG. 2 When the web section A according to FIG. 2 is inserted, it is first inserted with the insertion rocker 48 open, guided past the transfer printing point 22 and inserted into the upper crawler unit 44, the flaps of which are closed.
  • the lower part of the web section A is then fed to the transport spikes of the lower caterpillar unit 46 by pivoting the insertion rocker 48 in the direction of the arrow 50.
  • the two caterpillar units 44, 46 are then transported around an initial section L UP , as can be seen in FIG. 3 by the forward movement of the fold 12.
  • the transport around the initial section L UP is preferably started by closing the loading rocker 48 and ended by closing the flaps (not shown) of the lower caterpillar unit 46.
  • the transport around the initial section L UP is stopped by a predetermined maximum length after a path movement.
  • the transport around the initial section L UP ensures that the transport spikes are securely immersed in the transport holes of the web sections A, B, whereby it should be noted that the two caterpillar units 44, 46 are arranged in the printer in such a way that their distance from one another is an integral multiple of Transport hole distance of the web 10.
  • the insertion rocker 48 serves to pivot both the web section A and the web section B.
  • the printer control registers every further transport movement of the web 10, ie the path covered by the web sections A, B is precisely known.
  • Also known to the printer controller as the device constant is the length L EU from the insertion mark M EA , M EB to the transfer printing point 22.
  • the fold 12 of a sheet to be printed first is not directly opposite the transfer location 22, but is placed in front of the transfer location 22 by a length L SU .
  • an accelerated transport by the length L SU takes place before a first toner image is transferred to the opposite web sections A, B at the transfer printing location 22.
  • an adjusting ruler 52 with markings is arranged in FIGS. 2 and 3 above the upper caterpillar 44.
  • an operator can use the setting ruler 52 to check whether a fold 12, 14 is arranged at a marking corresponding to the length of the form. If this is not the case, the insertion process must be corrected or repeated in order to avoid incorrect printing.
  • the length L EE shown in FIGS. 3 and 4 defines the location of the marking as a distance from the insertion mark M EA , M EB for a specific form length.
  • the minimum length L DSMIN for the web loop 42 is usually 0.5 x 12 inches.
  • Figure 4 shows a schematic representation of the Arrangement of a loop sensor 56 in the web loop 42.
  • the web section B leaves the turning station 36, it passes through the web loop 42, the length of the web through which Loop sensor 56 is detected.
  • a dotted line indicates the course of the track section B with a loop length equal to zero.
  • This operating mode affects the insert mode with coupled Drive units 20a, 20b for web sections A and B.
  • the work steps 1 to be carried out in this operating mode A1 to 5 are also partially in the other operating modes used. These steps are therefore described below with reference to Figures 1 to 3 explained in more detail.
  • the printer is in an initial state without inserted web 10.
  • a non-folded sheet is also by flipping a front section creates a defined leading edge.
  • the following are the Steps only using the folded web 10 explained. However, it should be noted that this Work steps in an analogous manner also with an unfolded railway can be run.
  • the first sheet of the web 10, which is part of the web section A, is placed in the upper track unit 44. Your flaps are closed so that the web 10 can be transported safely through the transport spikes engaging in its transport holes.
  • the front edge of the web 10 is transported to the inlay mark M EA with slow web feed.
  • the loading rocker 48 is then closed, whereupon the web section A is automatically moved forward by the initial section L UP .
  • the operator closes the flaps of the lower caterpillar unit 46.
  • the flaps can also be closed automatically. When the flaps are closed, a signal is generated by which the printer control stops the web transport.
  • the printer control registers each web movement. This is made possible, for example, by the fact that the crawler units 44, 46 are driven by stepper motors, the transport pulses of which are counted. If the flaps of the lower track unit 46 are not closed, the web transport is stopped after a maximum initial section of the length L UPMAX .
  • Figure 3 shows the forward transport of the fold 12 by the length L UP .
  • the web section A is transported at a relatively high speed, which corresponds to the speed in the printing operation of the high-performance printer, through the fixing station 32, the deflection unit 34, the turning station 36 and the web loop 42.
  • the transported length of the web 10 is determined by the printer controller so that when the web 10 is subsequently inserted with the turned-over second web section B, its leading edge can be placed again at the insertion mark M EB and the length L DS of the web 10 in the web loop 42 is minimal is.
  • a fold 12, 14 of the first web section A of the insertion mark M EA is opposite.
  • the insertion rocker 48 is opened again.
  • the operator leads the second web section B past the transfer printing point 22 and now places the leading edge, ie the same edge that was previously on the setting mark M EA , on the insertion mark M EB .
  • the flaps of the upper crawler unit 44 and the loading rocker 48 are then closed, and the web is transported around the initial section L UP .
  • the flaps of the lower track unit 46 are closed.
  • the web transport is stopped either when the flaps are closed or after a transport of length L UPMAX . Since the transport units 20a, 20b of the web sections A, B are firmly coupled to one another, both web sections A, B move at the same speed, their folds 12, 14 being aligned with one another.
  • the web 10 is transported at a transport speed corresponding to the speed in the printing operation until the first sheet of the web section B has been discharged via the discharge roller 38 and has been fed to the discharge stack 40. Due to the rigid coupling of the transport units 20a and 20b, the web section A is transported continuously and synchronously with the web section B. The transport of the web 10 is stopped such that a fold 12 or 14 of the web sections A, B is positioned at the start position 54 at a distance L SA in front of the transfer printing point 22. A fold 12, 14 then faces a marking on the setting ruler 52, which corresponds to the set form length F L of the web 10. The operator can use the setting ruler 52 to check whether the insertion process has been carried out correctly.
  • Printing operation for web section A is started first. Due to the dimensioning of the printer, the length L UU of the web 10 between the transfer location 22 of the web section A and the transfer location 22 of the web section B is known to the printer controller and thus also the number of sheets corresponding to the length L UU . Since the first sheet of the web section A at the insertion mark M EA and when inserting the web section B the same sheet has been placed again at the insertion mark M EB and both insertion marks M EA and M EB are aligned with one another, the printer control can print positions on the sheets of the web section A and clearly assign the track section B.
  • the text assigned to a sheet of the web 10 on the front and back can thus be printed on the web section A or the web section B by means of a time-delayed printing, without a print image shift occurring.
  • the time offset results from the transport speed and the length L UU and is determined, for example, by the number of drive pulses for the transport device 20.
  • FIG. 5 schematically shows the individual steps 1 to 5 in operating mode A1 when using a form with a form length of twelve inches.
  • FIG. 5 shows the relative position of the starting position 54, the transfer printing point 22, the setting ruler 52 and the insertion marks M EA and M EB as well as that of the output stack 40 in relation to the transported web 10 divided into sheets. For reasons of clarity, the associated reference symbols are only entered in the upper part of the figure. From this figure, the transported lengths can also be seen according to the definitions given above.
  • Process steps 1 and 2 are shown graphically in the image section below.
  • the front edge of the first sheet can now be placed exactly on the M EB insertion mark.
  • step 3 the leading edge of the foremost sheet is transported forward by the start section L UP .
  • step 4 the first sheet arrives at the depositing stack 40, with a fold 12, 14 of the web 10 facing the setting rule 54. In the present case, the fold 12, 14 must coincide with the 12 inch mark if the insertion process has been carried out correctly.
  • step 5 Execution of step 5 shown. It will be the Printing operation in web section A started what by a black half bar is shown. Overall are 28 unprinted sheets required to complete the loading process to carry out, i.e. the waste is 28 sheets. If the first printed sheet 60 as it moves forward at transfer location 22 as part of web section B arrives, it is printed on the back. The text and Image elements are thus shifted by 18 sheets printed with a length format of twelve inches.
  • Transport routes Li Those covered for the various process steps i Transport routes Li are given below, where i is a is the run variable corresponding to the step number.
  • L2 (n2 x L F ) -L1
  • n2 indicates the number of sheets transported, which is determined by the printer controller from the following relationships: (n2 - 1) x L F ⁇ L UU + L DSMIN and n2 x L F ⁇ L UU + L DSMIN
  • L4 [(n4 - n F ) x L F ] - (L3 + L EE ) where n4 specifies the number of sheets resulting from the relationship: (n4 - 1) x L F ⁇ L SAT and n4 x L F ⁇ L SAT
  • n F The correction by n F is necessary because the length L SA is related to the starting position 54, but the transported web 10 is related to the marking on the setting ruler 52.
  • This step corresponds to step 1 according to operating mode A1.
  • the web section A is transported through the printer at a relatively high speed corresponding to the speed during the printing operation.
  • the length of the transported web 10 is determined by the printer controller so that after the web section B has been inserted, the front edge comes to lie in the web loop 42 in the output stack 40, taking into account a minimum web length.
  • the web 10 is output behind the web loop 42 in a buffer area.
  • the transport is stopped at a web length at which a fold 12, 14 of the web section A faces the start position 54.
  • the fold 12, 14 is therefore no longer opposite the insertion mark M EA , but rather a marking on the setting ruler 52 which is assigned to the entered form length F L.
  • the transport units 20a and 20b are decoupled, so that when the transport unit 20b moves, the transport unit 20a stands still and the web section A is not transported.
  • the first sheet of the web section B is inserted into the upper caterpillar unit 44 and the flaps are closed.
  • the front edge of the first sheet is then transported to the M EB insert mark at a slow feed rate.
  • the insert rocker 48 is closed and a transport takes place by an initial section of the length L UP , as has already been described in step 1 in the operating mode A1. It should be noted that, in step 3, only web section B is transported while web section A is unchanged.
  • the sheets of web section B are relatively tall Speed according to the speed at Printing operation by the fuser 32 and the discharge roller 38 conveyed until the first sheet on the output stack 40 lies.
  • the rail section A not moved.
  • the transport is stopped at a Position at which a fold 12, 14 of the web section B of the Marking on the setting ruler 52 faces that of entered form length is assigned.
  • the folds 12, 14 of web section A and web section B are aligned together. Now both transport units 20a, 20b coupled non-rotatably again, so that a common Forward movement of the track sections A, B can take place.
  • FIG. 6 shows the results corresponding to FIG. 5 after the execution of steps 1 to 5 in operating mode B1 with a form length of 12 inches.
  • step 2 the web 10 is transported by a length L2 which is sufficient to feed the first sheet of the web 10 to the output stack 40.
  • step 3 the first inserted sheet has been transported further by the insertion mark M EB by the length L UP .
  • step 4 a fold 12, 14 of the web section B faces the marking on the setting ruler 52 assigned to the form length F L , ie the folds of the adjacent web sections A and B are aligned with one another.
  • step 5 the printing operation for the web section A begins, the sheets of which are also printed on the back after reaching the transfer location 22. This operating mode results in a number of 28 unprinted sheets, ie a waste of 28 sheets.
  • L2 [(n21 + n22 - n F ) x L F - (L1 + L EE ) where n21 is the number of sheets transported to reach the start position 54 and n22 is the number of sheets to overcome the length L SA that comply with the relationship: (n21-1) x L F ⁇ L UU + L DSMIN n21 x L F ⁇ L UU + L DSMIN (n22-1) x L F ⁇ L SAT and n22 x L F ⁇ L SAT
  • n F takes place since the length L SA is related to the start position 52, but the transported web 10 is based on the marking on the setting ruler 52.
  • L4 [(n4 - n F ) x L F ] - (L3 + L EE ) where n4 is the number of forward sheets that the relationship maintains: (n4 - 1) x L F ⁇ L SAT and n4 x L F ⁇ L SAT
  • insertion is coupled with Transport units 20a, 20b by the signal of a Web storage sensor (see FIG. 5) supported.
  • the advantage in this mode A2 is that the operator leaves can tear off during insertion operation without this leads to an incorrect insertion result.
  • This step corresponds to step 1 in the operating mode A1.
  • This step corresponds to step 2 according to operating mode A1.
  • the operator has one or more sheets of the web breaks because, for example, the front edge of the the first leaf is damaged, the same number of torn sheets by pressing the Rail feeds are transported, otherwise the Web length is not sufficient to insert web section B.
  • This step also corresponds to step 3 according to operating mode A1.
  • the operator can be determined from the signal of the loop sensor 56 whether the web loop has the correct web length. If this is not the case, the operator must provide a sufficient web length by operating the transport device. It is essential that when the web section B is inserted, the front edge of the first sheet bears against the insertion mark M EB and the folds of the web sections A and B are aligned with one another.
  • This step corresponds to step 4 according to operating mode A1.
  • Printing in web section A is started. Since the Length of web from transfer location 22 to transfer location 22 at a loop length equal to zero in the web loop 42 one Is constant, the printer control can be set using the Signals of the loop sensor 56 in addition in the Take the web loop 42 into account and include the web length accordingly the total length of the web from transfer location 22 to Calculate transfer point 22. Because of this total length can an exact assignment of the front and back of the same Sheet in the different path sections A and B. detected and printing on the front and back of the Sheet without print offset.
  • insert operation takes place with decoupled drive units 20a, 20b for the Track sections A and B with the support of the Web storage sensor.
  • This step corresponds to step 1 according to operating mode A1.
  • This step corresponds to step 2 according to operating mode A1; in addition, the operator can front sheets of the web tear off and according to the number of sheets torn off transport the web 10 forward.
  • the Transport unit 20a By transporting the Transport unit 20a must have such a track length available be made that the first sheet of the web section B to to the output stack 40 with the transport unit 20a at a standstill can be transported by the transport unit 20b.
  • This step corresponds to step 3 according to operating mode A1.
  • Sheets of web section B are replaced by the Transport unit 20b transported to the output stack 40, wherein the path section A due to the decoupling of the Transport units 20a, 20b stands still.
  • the printer control arranges a rail transport until the Loop sensor 56 the correct web length in the web loop 42 signals. After stopping the rail transport folds 12, 14 of web sections A, B are aligned with one another (see step 4 according to operating mode B1). Then be the transport units 20a, 20b coupled again.
  • This step corresponds to step 5 according to operating mode A1.
  • the insertion is carried out with coupled Drive units 20a, 20b for web sections A and B, where synchronous marks are printed on the web and detected become.
  • After being transported through the printer the printed page arrives in an area as web section B. in front of the transfer location 22, where an optical sensor is arranged is, which scans the web 10 for the synchronous mark.
  • the Printer control evaluates the signal from the optical sensor. Is the synchronous mark detected at a time that the If the length of the web is correct when it is loaded correctly, then printing continued. Otherwise there is a Error message and printing operation stopped.
  • This step corresponds to step 1 according to operating mode A1.
  • This step corresponds to step 2 according to operating mode A1.
  • the operator can however, tear off sheets at any time and new sheets through the Push the transport device.
  • This step corresponds to step 3 according to operating mode A1. Has the operator tore off sheets and pushed them forward to ensure that the loop length in the web loop 42 has the prescribed length.
  • This step corresponds to step 4 according to operating mode A1.
  • Printing in web section A is started. On the first printing page becomes a at the printing point 22 Synchronous mark printed.
  • track section B track 10 becomes by an optical sensor for the presence of the Synchronous mark scanned.
  • the Printing continued. Otherwise the printing operation stopped and an error message was generated.
  • the insertion is carried out with decoupled Drive units 20a, 20b for web sections A and B, where also a synchronous mark on the first printed page is printed.
  • This step corresponds to step 1 according to operating mode A1.
  • This step corresponds to step 2 of operating mode Bl. Es leaves can be torn off, whereupon a appropriate number of sheets must be transported.
  • This step corresponds to step 3 according to operating mode B1.
  • the Web length in web loop 42 must be a predetermined one Length can be set.
  • This step corresponds to step 4 according to operating mode B1.
  • Printing for web section A is started. On a synchronous mark is printed on the first printed page is scanned in path section B. Depending on the Scanning result, printing continues or stopped. In addition, the web length can be in the web loop 42 checked and adjusted if necessary.
  • the operating modes A4, B4 and A5 described below B5 relate to a loading plant in which the waste, i.e. railway waste is minimized. To achieve this, is already printing during the insertion operation of a web section started and the one already printed Web section B is inserted into the transport unit 20b.
  • Two variants are possible. At a first Variant is the printed web section B in the Transport device inserted, the print image on the adjacent track section A still unfixed and smearable is. In the second variant, the printed image is the adjacent track section A already fixed.
  • Step 1
  • This step corresponds to step 1 according to operating mode A1.
  • the web section A is initially transported unprinted, until a front edge conforms to the corresponding form Marking of the setting rule 52 is present.
  • Printing on sheets of web section A begins.
  • the length the web 10 is set by the printer controller so that after inserting the web section B in the Transport device 20 the first sheet with minimal Web length in web loop 42 on output stack 40 would lie on.
  • the web section B is initially in one Buffer area promoted behind the turning station 36.
  • the train 10 passes through the fixing station 32 and fixes the Toner images.
  • This step corresponds to step 3 according to operating mode A1.
  • the leading edge of the web section B becomes forward transported until it conforms to the associated form Marking of the setting rule 52 is present.
  • Printing for web section B is started.
  • the Web section A is not printed.
  • the track section B is at a speed corresponding to the printing operation forwarded and promoted by the fuser 32 until that first sheet comes to rest on the output stack 40.
  • the already printed and fixed web section A is transported synchronously.
  • step 4 several sheets are withdrawn and the Web section B inserted (step 5). Be in step 6 web section A and web section B forward transported until the front edge of the web section B according to the form at the corresponding marking of the Setting ruler 52 is present. There is pressure in the web section B started, the back of the already printed Sheets are provided with toner images (steps 7 and 8), as can be seen from the completely blackened bar is.
  • L2 (n2 x L F ) - (L1 + L EE ) where n2 is the number of sheets determined by the printer controller from the following relationships: (n2 - 1) x L F ⁇ L UPMAX + L EE and n2 x L F ⁇ L UPMAX + L EE
  • n UP n2 + n around + n F
  • n3 n31 + n32 - (n2 + n F )
  • the size n31 indicates the number of printed sheets from the transfer location 22 until the transfer location 22 is reached again.
  • the size n32 specifies the number of sheets which have been transported forward beyond this transfer location 22.
  • the sizes n31 and n32 result from: (n31-1) x L F ⁇ L UU + L DSMIN n31 x L F ⁇ L UU + L DSMIN (n32 - 1) x L F ⁇ L SAT n32 x L F ⁇ L SAT
  • n7 n32 - (n2 + n F )
  • n2 and n F are identical because the size n32 is related to the length L SA , but the number of printed sheets is only related to the web transported according to step 7.
  • This step corresponds to step 1 according to operating mode A1.
  • the web section A is transported forward unprinted, until a fold conforms to the relevant marking on the form of the setting ruler 52 is present.
  • the transported length of the The web is adjusted so that after the web has been inserted (Path section B) the first sheet at minimal Loop length in the web loop 42 in the output stack comes to lie. It should be noted that the after the turning station 36 arriving track section B initially in a buffer area is stored and only after insertion in the Transport device 20 transported to the output stack 40 becomes.
  • Step 3
  • This step corresponds to step 3 according to operating mode B1.
  • the web section B is transported forward unprinted, until the relevant fold 12, 14 on the form correct marking of the setting ruler 52 is present.
  • Printing for web section B is started.
  • the train is at print speed by the fuser 32nd conveyed until the first sheet is in the output stack 40.
  • FIG. 8 again shows one corresponding to FIG. 5 Presentation of the results after performing steps 1 to 7 in operating mode B4 for a form length of 12 inches.
  • the Loop length for the example shown in the Web loop 42 is one sheet, i.e. 1 x 12 inch.
  • Step 2 is a transport of the web 10 by a length L2, which is sufficient to the first sheet of the web 10 Feed output stack 40.
  • step 3 is a predetermined number of sheets on one side of the Lane 10 printed.
  • the web section B in the decoupled transport unit 20b inserted.
  • the web 10 is transported unprinted until the fold according to the form at the correct marking of the Setting ruler 52 is present.
  • step 6 the pressure started on the track section B and the track 10 with Print speed passed through the fuser 32 until the first sheet is in the output stack 40.
  • step 7 the printing operation with coupled Transport units 20a, 20b for the web sections A and B. started.
  • L2 (n2 x L F ) - (L1 + L EE ) where n2 respects the relationships (n2 - 1) x L F ⁇ L UPMAX + L EE n2 x L F ⁇ L UPMAX + L EE
  • n3 n31 + n32 - (n2 + n F ) where n31 indicates the number of sheets corresponding to the length L UU and n32 the length L SA , (n31-1) x L F ⁇ L UU + L DSMIN n31 x L F ⁇ L UU + L DSMIN (n32 - 1) x L F ⁇ L SAT n32 x L F ⁇ L SAT
  • L5 (n5 x L F ) - (L4 + L EE ) the condition being observed (n5-1) x L F ⁇ L UPMAX + L EE n5 x L F ⁇ L UPMAX + L EE
  • n6 n32 - (n2 + n F )
  • This operating mode applies to insert mode coupled drive units 20a, 20b, wherein during the Insert operation is already printed and all Print images can be fixed.
  • the difference to printing in Insert operation, in which a part of the printed images is not is fixed, is that the buffer area with complete fixation must be greater than incomplete fixation because the buffer area is larger Number of sheets must take up.
  • the process steps are correct essentially the same as in A4 mode.
  • This step is the same as in A4 mode.
  • This step is the same as in A4 mode.
  • step 3 The procedure is as in step 3 according to operating mode A4.
  • sheets are so far without printing on them promoted by the fuser 32 until all printed sheets are fixed. Then the train withdrawn by the appropriate length.
  • This operating mode corresponds to that of operating mode A5, with the difference that the transport units 20a, 20b be decoupled during insertion.
  • step 3 After operating mode B4.

Claims (25)

  1. Procédé pour faire fonctionner un appareil d'impression électrographique dans lequel, lorsqu'une matière formant support sans fin est insérée dans l'appareil d'impression, le bord avant ou un pli (12, 14) d'une première section de bande (A) d'une bande (10) est placé au niveau d'un repère d'insertion (MEA),
    puis le défilement de la bande (10) est effectué dans l'appareil d'impression où la bande est décalée, et en outre le cas échéant retournée, de façon à faire passer une seconde section de bande (B) décalée par une station de duplication (22) d'une unité d'impression (24), dans un plan tout en étant placée à côté de la première section de bande (A),
    laquelle station de duplication sert à transférer simultanément des pigments de couleur sur les deux sections de bande (A, B) de la bande (10),
    le bord avant ou un pli (12, 14) de la seconde section de bande (B) est placé au niveau du repère d'insertion (MEB),
    et à ce moment le mode d'impression simultanée sur les deux sections de bande (A, B) de la bande (10) est enclenché,
    le défilement des première et seconde sections de bande (A, B) étant effectué par un dispositif de défilement (20) qui est agencé près de l'unité d'impression (24) et qui comporte des moyens de défilement (44, 46) qui sont en prise avec les deux sections de bande (A, B) et qui, en mode d'impression, se déplacent à peu près à la même vitesse.
  2. Procédé selon la revendication 1, dans lequel la seconde section de bande (B) passe par un accumulateur de bande (42) formant de préférence une boucle de bande de longueur prédéterminée avant d'atteindre le dispositif de défilement (20).
  3. Procédé selon la revendication 1 ou 2, dans lequel les repères d'insertion (MEA, MEB) sont placés en aval ou en amont de l'unité d'impression (24), par référence au sens de défilement de la bande, dans une zone visible depuis l'extérieur de l'appareil d'impression.
  4. Procédé selon l'une des revendications précédentes, dans lequel les première et seconde sections de bande (A, B) sont amenées, après l'impression à la station de duplication (22), à une station de fixation unique (32) qui fixe les pigments de couleur sur les sections de bande (A, B) agencées l'une à côté de l'autre.
  5. Procédé selon l'une des revendications précédentes, dans lequel le défilement de la première section de bande (A) et de la seconde section de bande (B) est effectué par une unité chenillée supérieure (44) du dispositif de défilement (20), agencée en aval de la station de duplication (22), par référence au sens de défilement, et par une unité chenillée inférieure (46) du dispositif de défilement (20), agencée en amont de la station de duplication (22), les unités chenillées (44, 46) comportant de préférence des picots de transport qui s'engrènent dans des trous de défilement des première et seconde sections de bande (A, B).
  6. Procédé selon la revendication 5, dans lequel, en mode d'insertion, la première section de bande (A) non décalée est tout d'abord insérée et fixée dans l'unité chenillée supérieure (44),
    le défilement du bord avant ou d'un pli (12, 14) de la section de bande (A) est effectué jusqu'au repère d'insertion (MEA) en faisant avancer lentement la bande,
    puis la première section de bande (A) est amenée jusqu'aux picots de transport de l'unité chenillée inférieure (46) en basculant une coulisse d'insertion (48) commune à la première section de bande (A) et à la seconde section de bande (B),
    et le défilement de la première section de bande (A) est effectué vers l'avant par les unités chenillées supérieure et inférieure (44, 46) sur une portion de distance initiale (LUP).
  7. Procédé selon la revendication 6, dans lequel le défilement sur une portion de distance initiale (LUP) est démarré en actionnant un commutateur, de préférence en fermant la coulisse d'insertion (48).
  8. Procédé selon la revendication 6 ou 7, dans lequel le défilement sur la portion de distance initiale est arrêté en fermant des volets de fixation au niveau de l'unité chenillée inférieure (46) ou bien après que la bande s'est déplacée d'une distance prédéterminée (LUPMAX).
  9. Procédé selon l'une des revendications précédentes, en particulier les revendications 6 à 8, dans lequel le dispositif de défilement comporte une première unité de défilement (20a) pour la première section de bande (A) et une seconde unité de défilement (20b) pour la seconde section de bande (B), et les deux unités de défilement (20a, 20b) sont couplées l'une à l'autre de façon fixe en rotation pendant le mode d'impression simultanée sur les sections de bande (A, B).
  10. Procédé selon la revendication 9, dans lequel les deux unités de défilement (20a, 20b) sont également couplées l'une à l'autre de façon fixe en rotation pendant le mode d'insertion.
  11. Procédé selon la revendication 10, dans lequel le bord avant ou un pli (12, 14) de la seconde section de bande (B) décalée est placé par un opérateur directement au niveau du repère d'insertion (MEB), dans lequel ensuite la seconde section de bande (B) est amenée aux picots de transport de l'unité chenillée inférieure (46) en basculant la coulisse d'insertion (48), et les unités chenillées supérieure et inférieure (44, 46) font défiler la seconde section de bande (B) vers l'avant sur la portion de distance initiale (LUP).
  12. Procédé selon la revendication 9, dans lequel la jonction tournante des deux unités de défilement (20a, 20b) est désolidarisée pendant le mode d'insertion, et un défilement de la seconde section de bande (B) est effectué alors que la première section de bande (A) est immobile.
  13. Procédé selon l'une des revendications précédentes 6 à 12, y inclus la revendication 12, dans lequel l'organe de commande de l'appareil d'impression après la fermeture de la coulisse d'insertion (48) détecte le mouvement des unités de défilement (20a, 20b) et, indépendamment du format en longueur d'une feuille, la bande (10) se déplace en amenant un pli (12, 14) de la première section de bande (A) ainsi qu'un pli de la seconde section de bande (B) à une position de départ (54) située à une distance de départ prédéterminée (LSU) en amont de la station de duplication (22).
  14. Procédé selon la revendication 13, dans lequel une règle d'insertion (52) comportant des repères est agencée dans la fenêtre de l'appareil d'impression en aval de la station de duplication (22) par référence au sens de défilement, ce qui permet de vérifier la position de départ (54) correcte de la première section de bande (A) et de la seconde section de bande (B).
  15. Procédé selon l'une des revendications précédentes 12 à 14, y inclus la revendication 12, dans lequel, dans un type de mode d'insertion dans lequel les unités de défilement (20a, 20b) sont temporairement découplées, l'appareil d'impression fait défiler la première section de bande (A) en fonction du format en longueur utilisé, de préférence à la vitesse utilisée en mode d'impression, sur une longueur prédéterminée, qui est suffisante pour placer le bord avant ou un pli (12, 14) de la seconde section de bande (B) au niveau du repère d'insertion (MEB),
    dans lequel le pli (12, 14) de la première section de bande (A) est amené à la position de départ (54) en amont de la station de duplication (22), et la jonction tournante entre la première unité de défilement (20a) et la seconde unité de défilement (20b) est désolidarisée,
    dans lequel le bord avant ou un pli (12, 14) de la seconde section de bande (B) est positionné au niveau du repère d'insertion (MEB) exclusivement par la seconde unité de défilement (20b),
    dans lequel enfin la seconde section de bande (B) passe par la station de fixation (32) à la vitesse utilisée en mode d'impression, et un pli (12, 14) est amené au niveau de la position de départ (54) en amont de la station de duplication (22),
    et dans lequel enfin les deux unités de défilement (20a, 20b) sont à nouveau couplées de façon fixe en rotation pour le mode d'impression.
  16. Procédé selon l'une des revendications précédentes 2 à 15, dans lequel le contenu de l'accumulateur de bande (42) est surveillé par un capteur (56).
  17. Procédé selon la revendication 16, dans lequel un opérateur commande le déplacement de la bande en fonction du signal du capteur (56) afin de placer la seconde section de bande (B) au niveau du repère d'insertion (MEB).
  18. Procédé selon la revendication 16, dans lequel l'organe de commande de l'appareil d'impression indique en fonction du signal du capteur (56) que l'insertion de la seconde section de bande (B) est incorrecte, et met le cas échéant une longueur de bande prédéterminée à la disposition de l'accumulateur de bande (42) par l'intermédiaire du dispositif de défilement (20), ou un opérateur actionne le dispositif de défilement (20) et règle la longueur définie de bande dans l'accumulateur de bande (42) en fonction du signal du capteur (56).
  19. Procédé selon l'une des revendications précédentes, en particulier des revendications 2 à 18, dans lequel un repère de synchronisation est imprimé sur la première section de bande (A) au début du mode d'impression,
    un capteur optique explore le verso de la seconde section de bande (B),
    et un signal d'erreur ou un signal d'arrêt est généré en fonction de la détection du repère de synchronisation.
  20. Procédé selon la revendication 19, dans lequel la longueur de la bande dans l'accumulateur de bande est réglée en fonction du signal du capteur optique en mode d'insertion lorsque les unités de défilement (20a, 20b) sont temporairement découplées.
  21. Procédé selon l'une des revendications précédentes, dans lequel une impression est déjà effectuée au niveau de l'unité d'impression (24) en mode d'insertion lors du défilement vers l'avant de la première section de bande (A) insérée.
  22. Procédé selon la revendication 21, dans lequel une partie de la première section de bande (A) dotée de l'image formée par du toner reste pour l'instant non fixée.
  23. Procédé selon la revendication 21, dans lequel sont fixées des images complètes constituées par les images formées par du toner et imprimées sur la première section de bande (A) en mode d'insertion.
  24. Procédé selon la revendication 21 ou 23, dans lequel en mode d'insertion où les unités de défilement sont couplées en permanence, la première section de bande (A) est tout d'abord imprimée, fixée et transportée sur une longueur suffisante,
    dans lequel une première feuille de la seconde section de bande (B) de longueur de bande définie dans l'accumulateur de bande (42) vient se déposer dans un dispositif collecteur (40), l'impression est interrompue et la bande imprimée (10) est retirée,
    dans lequel la seconde section de bande (B) est placée, de préférence en déplaçant lentement la bande, au niveau du repère d'insertion (MEB) et est amenée dans la position de départ (54),
    dans lequel seule la seconde section de bande (B) est imprimée dans l'unité d'impression (24) et est fixée par la station de fixation (32) jusqu'à ce que la première feuille vienne se déposer dans le dispositif collecteur (40),
    et dans lequel enfin le mode d'impression simultanée est démarré sur les deux sections de bande (A, B).
  25. Procédé selon l'une des revendications précédentes, dans lequel lors de l'insertion de la première section de bande (A), une section avant est renversée dont le bord renversé forme le bord avant qui est placé au niveau du repère d'insertion (MEA).
EP96922881A 1995-10-27 1996-06-21 Procede permettant de faire fonctionner une imprimante electrographique pour l'impression simultanee de deux sections adjacentes d'une bande Expired - Lifetime EP0857323B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP96922881A EP0857323B1 (fr) 1995-10-27 1996-06-21 Procede permettant de faire fonctionner une imprimante electrographique pour l'impression simultanee de deux sections adjacentes d'une bande

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP95116971 1995-10-27
EP95116971 1995-10-27
PCT/EP1996/002713 WO1997016768A1 (fr) 1995-10-27 1996-06-21 Procede permettant de faire fonctionner une imprimante electrographique pour l'impression simultanee de deux sections adjacentes d'une bande
EP96922881A EP0857323B1 (fr) 1995-10-27 1996-06-21 Procede permettant de faire fonctionner une imprimante electrographique pour l'impression simultanee de deux sections adjacentes d'une bande

Publications (2)

Publication Number Publication Date
EP0857323A1 EP0857323A1 (fr) 1998-08-12
EP0857323B1 true EP0857323B1 (fr) 2001-04-25

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EP (1) EP0857323B1 (fr)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19804758A1 (de) * 1998-02-06 1999-08-12 Oce Printing Systems Gmbh Verfahren zum Einstellen der Schlaufenlänge abhängig von der Formularlänge
JP2003155152A (ja) * 2001-11-20 2003-05-27 Fujitsu Ltd 画像形成装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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JPS5884782A (ja) * 1981-11-13 1983-05-20 Fujitsu Ltd 連続媒体の自動装填装置
DE59005481D1 (de) * 1989-12-13 1994-05-26 Siemens Nixdorf Inf Syst Elektrofotografische druckeinrichtung für endlospapier mit einer thermo-druckfixierstation.
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

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WO1997016768A1 (fr) 1997-05-09
EP0857323A1 (fr) 1998-08-12

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