EP0815496B1 - Dispositif de synchronisation exacte du defilement parallele de supports d'enregistrement sous forme de bandes dans un dispositif d'impression electrographique - Google Patents

Dispositif de synchronisation exacte du defilement parallele de supports d'enregistrement sous forme de bandes dans un dispositif d'impression electrographique Download PDF

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Publication number
EP0815496B1
EP0815496B1 EP95936574A EP95936574A EP0815496B1 EP 0815496 B1 EP0815496 B1 EP 0815496B1 EP 95936574 A EP95936574 A EP 95936574A EP 95936574 A EP95936574 A EP 95936574A EP 0815496 B1 EP0815496 B1 EP 0815496B1
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EP
European Patent Office
Prior art keywords
recording medium
webs
region
printing
loop
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
EP95936574A
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German (de)
English (en)
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EP0815496A1 (fr
Inventor
Edmund Creutzmann
Andreas Eckardt
Walter Kopp
Hans Winter
Martin Silbersack
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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Publication date
Application filed by Oce Printing Systems GmbH and Co KG filed Critical Oce Printing Systems GmbH and Co KG
Priority to EP95936574A priority Critical patent/EP0815496B1/fr
Publication of EP0815496A1 publication Critical patent/EP0815496A1/fr
Application granted granted Critical
Publication of EP0815496B1 publication Critical patent/EP0815496B1/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
    • G03G15/232—Arrangements for copying on both sides of a recording or image-receiving material using a single reusable electrographic recording member
    • G03G15/234—Arrangements for copying on both sides of a recording or image-receiving material using a single reusable electrographic recording member by inverting and refeeding the image receiving material with an image on one face to the recording member to transfer a second image on its second face, e.g. by using a duplex tray; Details of duplex trays or inverters
    • G03G15/237—Arrangements for copying on both sides of a recording or image-receiving material using a single reusable electrographic recording member by inverting and refeeding the image receiving material with an image on one face to the recording member to transfer a second image on its second face, e.g. by using a duplex tray; Details of duplex trays or inverters the image receiving member being in form of a continuous web
    • 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 device for precise position Synchronization of the parallel run of record carrier webs in an electrographic printing device.
  • An electrographic printing device with two in parallel arranged record carrier webs simultaneously by the Printer is moved and printed, for example, is off WO 94/27193 known.
  • WO 94/27193 An electrographic printing device with two in parallel arranged record carrier webs simultaneously by the Printer is moved and printed, for example, is off WO 94/27193 known.
  • the paper webs are usually driven by friction in nips or via friction roller drives.
  • Critical is in particular the drive in the nip (Fixing gap) between the fixing and pressure roller of a thermal pressure fixing station.
  • a friction drive transports one track length per time interval. Changes depending on the force and friction conditions however, the slip, which is inherent in every friction drive occurs. Slip means that no firm Gear ratio from the driving part to the driven part Part exists and the driven part more or the driving less lagging behind.
  • the paper web around the slip is slower than the surface speed of the drive roller. With the same Drive motor speed changes the speed the driven paper web due to force and friction influences.
  • the paper webs are usually driven by positive locking via paper caterpillars or pin wheels, which in Intervene in the transport perforations of the paper.
  • a more form-fitting Drive is also meant here as a drive Mechanics according to a friction drive, but e.g. electronic means for the transportation of shaped elements is regulated. Such a drive therefore regulates different ones Slip out automatically and behaves in with respect to the web speed like a positive one Drive.
  • Shape elements are recurring detectable Features related to the paper web. For example be: transport perforations, printing marks, folds, perforations, Labels.
  • a positive drive transports a defined one Number of form elements (e.g. links in a chain, transport perforations in the paper web) per time interval.
  • the transport holes can be different from one another Have clearances (punching tolerances, paper shrinkage). Tolerances in the perforation distance below a permissible Limits do not affect the function of the drive. This one Tolerances that occur are of the order of up to 0.2%. This will transport a certain number of Transport holes each have a different track length transported.
  • Two form-fitting drives in a row are in the series connection of two positive drives the two drives (speeds) are permanently coupled, the content of the intermediate web store changes not summary. If the 1st drive becomes a transport perforation a transport perforation is subtracted from the 2nd drive. The sum of the transport perforations between the drives remains the same. So there is no regulation of the length of the web between Drive 1 and 2 required.
  • the fixed coupling of Actuators 1 and 2 can be both mechanical (e.g. via a fixed Shaft connection or a gear) as well as electronic (e.g. by using two stepper motors on same beat). This drive is subject to tolerance however, the web speed, which is related to the punch tolerance changes.
  • the coupling of the drives does not guarantee that trouble-free running of the paper web.
  • Depending on the amount of Slip from drive 1 and 2 will be so while running Paper set a drive speed difference.
  • the web store will be either emptied and the paper tears, or it overflows. So here you have to regulate the length of the web between the two Drives take place.
  • the scheme is usually called Drive speed control of at least one of the two drives. With the regulation of the drive speed the content of the web store on one constant value is kept.
  • Parallel means that the tracks run side by side namely by the same divided or undivided aggregates or functional units.
  • synchronous is meant that between the forms of the one track and the forms of the other web no shift occurs when the paper running.
  • the front edge of the forms lies the same for both lanes when the alignment line is reached is.
  • the alignment policy coincides with the Line in which the paper is printed.
  • To ensure synchronicity ensure a common form-fitting here Drive inserted. From the coupled positive drive A- and B-Bru run parallel. Because of differences the paper web speeds are in the transport perforation different from lane A and lane B, although the expiring hole frequency is the same.
  • the A-Bru runs after Track drive through the pair of fuser rollers.
  • the pair of fuser rollers is on the one hand a friction drive, on the other hand is here the print image is fixed to the paper by hot rollers. With this heating, the paper web shrinks in the longitudinal direction. This shortens the distance between the transport perforations, by about 0.06%, for example.
  • the A-Bru returned and then runs in parallel synchronous to the new A-Bru as B-Bru thanks to the caterpillar drive. It follows that the B-Bru is now 0.06% Shrinkage runs slower than the A-Bru.
  • a continuous printer can via a tape storage, for. B. a loop puller.
  • the transport speeds of the adjacent drives depending on its memory content regulated.
  • Such synchronization is parallel-synchronous for the reasons described Operation of two lanes is not possible.
  • the object of the invention is therefore a device for precise synchronization of the parallel run of record carrier webs in an electrographic printing device to provide, in which the record carrier webs positively driven via a drive device pass through a first functional area in parallel and then parallel to each other a second functional area can be fed with a friction drive.
  • Another object of the invention is also the device To be designed so that they are particularly simple and reliable control of the parallel run of the recording medium webs in an electrographic printing device, such as it is known from WO 94/27193.
  • Each lane has a lane store, which is also used as a band store referred to as.
  • a loop puller spans each the paper web and measures the content of the web memory (the Length of paper loop).
  • the loop length control works in the same direction on both paper loops.
  • the main instrument of this regulation is the rotational speed of the friction roller (fixing roller).
  • the loop difference control works in opposite directions on both paper loops.
  • the main instrument here is the web-specific regulation of the tension in the respective paper web.
  • Figure 1 is a schematic representation of a record carrier web with two positive drives in series.
  • Figure 2 is a schematic representation of a record carrier web with two friction drives in series.
  • Figure 3 is a schematic representation of a record carrier web with two different drives in series.
  • Figure 4 is a schematic representation of the paper flow in a printing device with two parallel recording medium webs.
  • Figure 5 is a schematic representation of the paper flow in a duplex printing device on a single Paper web with two parallel recording media webs.
  • Figure 6 is a schematic representation of the structure of a Printing device with duplex printing according to Figure 5 with a control device for synchronizing the parallel Record carrier webs.
  • Figure 7 is a schematic representation of the function of a Tape storage used loop puller
  • Figures 8 to 12 are schematic representations of loop puller configurations with adjustable deflection force and different Force characteristics and
  • Figure 13 is a schematic representation of a Pressure force adjustment mechanism for the pressure roller one Fuser.
  • the invention is based on the structure of a electrographic printing device for one or both sides Printing on a tape-shaped recording medium, as is known from WO 94/27193.
  • Paper run with an electrographic printing device with Return of the record carrier and a parallel run control Paper run with an electrographic printing device with Return of the record carrier and a parallel run control.
  • FIG. Printing device of the tape-shaped recording medium 1 starting from a feed area z. B. from one Roll fed into the printer and in the area of the alignment line 2 printed with the toner images assigned to the front.
  • the record carrier 1 is pre-folded Continuous paper formed with the specified form length.
  • the Area of alignment line 2 is the transfer printing area for transfer printing of the toner images from an intermediate carrier (Photoconductor drum) on the recording medium 1 with a Structure according to WO 94/27193.
  • the drive 3 in the transfer printing area takes place positively via tractors with it arranged nipples, which in corresponding edge perforations (shown as white omissions) of the record carrier 1 intervene.
  • the Front assigned path from the returned and reversed web assigned to the back in the transfer printing area is the "front-side railway" A-Bahn (Reference number 5) and the "backside web” B-Bru (Reference number 4) called.
  • the A-Bru 5 passes a belt store in the form of a loop puller 6/1 and is about a vacuum brake 7/1 from a friction drive 8 in Form driven a fuser. After that the train returned and turned in a turning device 10 parallel to the freshly drawn web, the positive one Drive 3 supplied as B-Bru 4. Here is when passing the alignment line 2 the back in the transfer area printed parallel and synchronous to the A-Bru.
  • the friction drive 8 is formed in the printer from the fixing roller 8/1 and pressure roller 8/2 and has the task of To fix toner images on the recording medium 1. Therefore the driven fusing roller 8/1 is heated.
  • the moving one Pressure roller 8/2 is pressed against the fixing roller.
  • the nip 9 between the two rollers becomes the paper web pressed, heated and driven.
  • the web shrinks due to moisture loss in the longitudinal and transverse directions.
  • the control device for precise synchronization of the Parallel run of the recording medium webs 4, 5 can be according to the representation of Figure 6 in the following modules divide.
  • loop puller unit 6 It consists of the loop puller unit 6 from two of the respective loop 4 and 5 associated loop pullers 6/1, 6/2, each having a loop-pull angle sensor 12, a spring mechanism 13 for the loop puller 7 and an adjusting device 14 for the loop-pulling torque .
  • a device for coupling is not shown of the two loop pullers.
  • a suction pump with a vacuum valve and Control assembly 16 consisting of two separately controllable valves 16/1, 16/2 is connected and that with the actual vacuum brake 7 from two separate sliding surfaces 7/1, 7/2 with Suction holes is coupled.
  • control electronics 20 a microprocessor-controlled in the usual way Arrangement over bus lines with power electronics 21 for the drive 17 of the fusing station, the drive 19 the pressure roller and the valves 16/1, 16/2 of the brake 7 in Connected and via a bus line with an in Control electronics 22 conventionally constructed for a Drive 23 of the positive drive 3 (caterpillars) of the transfer station.
  • the control electronics 20 is still over Lines coupled to the rotation angle sensors 12 of the loop puller 6 and is connected to the device control via a bus line 24 of the printer. Their construction is over WO 94/27193 known.
  • Input variables for the control are via the bus or Control lines 24 from the environment (device control) and over the control 22 of the drive 23 of the caterpillars in the Transfer station of the control electronics 20 supplied.
  • the loop pullers 6/1, 6/2 next to each other each with its own spring 13/1, 13/2 deflected Attack on deflection elements 25 via articulation lever 30.
  • the initial angular position of the articulation lever 30 influences the Change the reverse torque (M) of the loop puller with the loop puller angle ( ⁇ ).
  • M Change the reverse torque
  • ⁇ loop puller angle
  • M Change the reverse torque
  • ⁇ loop puller angle
  • ⁇ loop puller angle
  • This rope 31 is on a retractor 32 appropriate.
  • a hand crank 33 and a Worm gear 34 rotates a shaft 35.
  • the retractor can spin or only in a defined Working angular range. The two sit on this shaft 35 Rope pulleys 36/1, 36/2 and a pointer 37 of a force setting scale 38.
  • the special design of the retractor 32 can the return torque between the two loop pullers 6/1, 6/2.
  • the generated back torques M of the two loop pullers 6/1, 6/2 are the same in both tracks A, B. This is advantageous when the paper webs have the same structure and there is no tendency for one web to tend to have a larger loop than the other.
  • the characteristic curves (abscissa ⁇ , ordinate M) of the return torques shown next to it are the same for both loop pullers 6/1, 6/2 in each of the adjustment positions (I, II of the scale).
  • link levers can also be used.
  • the rope 31 ( Figure 8) is only on a loop puller shortened, there is a difference between the two torque characteristics. If the winding behavior is otherwise symmetrical, this remains Difference across all force settings the same. With asymmetrical Arrangements become more targeted with the rope length Offset between loop puller A and B created.
  • levers 39 can also be used to which the rope 31 is articulated. By different Lead angle it is possible to different and to achieve non-linear adjustment characteristics.
  • crank and Worm gear can also be done automatically (e.g. with Electric motor). This also applies to the separate adjustment.
  • the setpoints for the automatic adjustment of the loop puller forces the printer can determine itself.
  • the setting the loop puller can be used once when inserting the Paper, or additionally dynamically during the Operating. Relevant measured variables are: paper width, Position of the loop puller, position of the web edge after the Loop puller and the slip of the webs in the following Fuser.
  • each loop puller one about an axis of rotation pivotable deflection element 25 with associated deflection spring 13/1, 13/2 ( Figure 8).
  • Each of the loop pullers 6/1 and 6/2 swings between an upper mechanical Stop 26 and a lower mechanical stop 27 about an axis of rotation 28. Its current position depends on the loop length released by the paper webs and thus from the content of the tape storage or the stored Tape length.
  • the controlled variable is regulated to its setpoint.
  • the controlled variable is the mean value MA (FIG. 7) of the current loop puller 6/1, 6/2.
  • the setpoint is, for example, the center MR of the loop puller work area. This regulates the control deviation of the loop length control RL towards zero.
  • the present control device regulates not on a parameter of a path, but on the condition of the lanes to each other.
  • control deviation RD of the loop difference control (FIG. 7) is regulated towards zero with the loop difference control. If a purely proportional control algorithm is used, a permanent control deviation may remain This may be desirable, since this can be used to support the regulation by the loop puller.
  • the braking forces are based on z. B. in a memory the control electronics 20 stored in the form of tables Standard settings or standard values for the vacuum changed. Depending on the direction and size of the difference of Loop puller will be proportional in one lane the braking force increases and in the other lane the braking force decreased.
  • the pressure force is the force with which the pressure roller 8/2 is pressed against the fixing roller 8/1. It affects strongly the relationship between the paper tension and the Slippage of the webs in the fusing nip 9. By less The pressure force becomes greater with the same paper tension force Slippage of the paper webs 4, 5 reached.
  • the loop difference control not able to with the allowable clamping forces To compensate for the loop difference, it reduces the pressure force through the pivot mechanism 18 of the pressure roller Twisting the cams on the motor 19. In contrast, the Contact pressure increased when high slip values occur. However, the pressure force cannot be reduced arbitrarily, since the fixation is no longer sufficient if the force is too low. A high pressure force has a favorable effect on the Fixation of the printed image.
  • This process can be repeated cyclically. Instead of using default settings when restarting after a synchronization stop it can be beneficial to use reduced values. If a paper has one Slip on it once for a synchronization stop is coming, it is likely that this will be cyclical repeated. In order to keep the print cycle as long as possible, the pressure force should be reduced when restarting be. Depending on the device concept, the cyclical repetition can of the synchronization stop the entire loop difference control replace.
  • the oiling of the fixing roller is usually used for Improvement of the toner release properties of the oiled Roller.
  • adjustable oiling stations in their oiling quantity as used in electrophotography are common. It is possible to change the oil flow in such a way To control oiling station via the control electronics 20 and thus influence the slip.
  • This arrangement is here progressive loop pulling force called.
  • the control algorithm of the loop difference control contains basically the function that in the web, its loop puller is relatively lower, a relatively higher resilience is produced. This relationship is also too mechanical realize.
  • the spring mechanism the loop puller designed so that the relative lower loop puller a relatively higher Tension in the respective paper web than the other. This difference in force must increase with the difference in angle increase.
  • the loops puller changes the paper tension in the same direction. In addition to the control-technical function of the loop puller, this can take on further functions. By deflecting the web around the loop puller, this stabilizes and guides the further course of the web. Adapted paper tensile forces are required here for different web qualities and web widths. This adjustment can take place via a manual setting mechanism, as was also described in connection with FIGS. 8 to 12.
  • the loop difference control can also be implemented mechanically become.
  • the actuators of Vacuum brakes 7/1, 7/2 e.g. vacuum valves 16/1, 16/2 mechanically coupled with the loop puller.
  • the then mentioned rule relationships and proportions are e.g. B. can also be realized via linkage arrangements.
  • the loop length control regulates the mean value MA two current loop puller positions ( Figure 7) its setpoint. By doing this, the permissible Control difference for loop difference control maximized. If this is not a priority, the loop length control can be used also exclusively on one of the loop pullers 6/1, 6/2 regulate. This regulation can be in the simplest arrangement, for. B. be a two-point control.
  • the second loop puller is then, as already described, regulated relative to the first.
  • the printing device in the control device according to the invention has a basic structure, as described in WO 94/27193. So that Printing device in both two-lane and one-lane Operation. This both with webs of Widths like that of two-lane operation, as well as with one Web width up to the entire width of the two individual Paper webs.
  • the two loop pullers are used for single-lane operation mechanically coupled and act like a continuous loop puller.
  • the current positions fall through the coupling the loop puller together.
  • Their mean is also identical to their current position.
  • This coupling can e.g. B. for reasons of operational safety by a Sensor to be monitored.
  • the effective width of the vacuum brakes can be adjusted Adjust the width adjustment, as with single-lane electrographic Printing devices for printing various Bandwidths are suitable, is common. With her can a continuously wide run can also be served.
  • the reactions are one rigid regulation more or less appropriate.
  • Advantageous here are self-learning regulations that control their behavior optimize depending on substrate and environmental conditions.
  • the parameters of the substrate and ambient conditions either via an input device in the Control device can be entered or the control device automatically records the parameters using appropriate sensors.
  • sensors can e.g. B. conventional sensors for thickness scanning of the substrate, for the detection of its surface structure, the ambient temperature, humidity, etc. be. It is also possible to print the substrate e.g. through a Label the barcode and scan it.
  • Via limit value and plausibility monitoring as well as combinatorial error analysis of parameters using a assigned to the control device or the device control Monitoring arrangement can machine errors over the previous possibilities are recognized and treated.
  • the monitoring function can also be performed by the control electronics be taken over by yourself. Like such a monitoring arrangement
  • the person skilled in the art is to set up the circuitry common.
  • FIG Fixing roller 201 which corresponds to the fixing roller 8/1 of Figure 6 is constructed.
  • a pressure roller 205 corresponding to the The pressure roller 8/2 of FIG. 6 is attached to the fixing roller swiveling.
  • the pressure roller 205 is supported on two lateral bearing elements 206.
  • the bearing elements 206 in turn are in the frame of the pressure device around a fixed axis of rotation pivotally arranged.
  • Cam discs 209 are provided, which on guide lugs 210 (rotatable rollers) of the bearing elements 206. Two on the side return springs 211 engaging the bearing elements 206 pull the bearing elements 206 against the guide lugs 210 the cam disks 209.
  • the cam disks 209 are each in one end of a lever-like Swing 212 arranged. These wings are over a stationary parallel to the pinch roller axis Swing arm axis 213 rotatably mounted.
  • Spring elements 218 suspended in the form of spiral springs. The other end of the coil springs 218 is with a rope or a chain 217 connected, the or each around a stationary Deflection roller 215 is guided.
  • the free rope or chain ends are one by one at a first end Axis of symmetry 216 pivoted lever 214 attached.
  • the spring force of the spring elements 218 is significantly greater than the spring force of the return springs 211 on the pressure roller 205.
  • the rockers are 212 pivoted away from the stops 219.
  • the cam discs 209 press the pressure roller according to their rotational position 205 against the fixing roller 201.
  • the pressing force becomes essentially determined by the spring force of the spring elements 218 in connection with the geometric structure the rocker 212 and the rotational position of the cam disks 209.
  • the actuator 220 consists of a in the effective direction of the spring elements 218 directional spindle 225, a spindle nut 223 and a spindle nut claw 222.
  • the spindle 225 is with an actuator 226 coupled by the control unit 21 ( Figure 6) can be controlled.
  • the control unit 21 Figure 6
  • the spindle turns 225 the spindle nut 223 in the longitudinal direction of the spindle 225 shifted and so depending on the deflection of the pivot lever 214 a corresponding pressure force on the between fixing roller 201 and pressure roller 205 performed not shown here Paper webs A or B exercised. In this way, the Power adjustment mechanism a web-specific pressure force in the Area of the fixing roller 201 exercised.
  • the use of the pressure force adjustment mechanism is preferable to the regulation of the pressure force already described, since the effect on the slip difference is greater by adjusting the forces in opposite directions.
  • the negative influence on the fixing quality is less, since the opposite reduction in the pressing force of the A-track turns out to be less than the simultaneous reduction in the pressing force of both tracks when pivoting the pivot cam 18 (FIG. 6).
  • the pivoting of the swivel cam 18 increases the slippage of both paper webs and causes a slip difference only indirectly through the use of the vacuum control. With the help of the pressure force adjustment mechanism, however, a path-specific change of the pressure forces is possible.
  • Papers with large perforated areas and other critical papers require only with the vacuum control if necessary without using the pressure force adjustment mechanism frequent synchronization stops. However, such stops are included Avoid looking at printer performance if possible.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Claims (21)

  1. Dispositif pour produire un défilement sans défaut de bandes de support d'enregistrement (4, 5) dans un dispositif d'impression électrographique, dans lequel les bandes de support d'enregistrement (4, 5), entraínées conjointement et par sûreté de forme au moyen d'un dispositif d'entraínement (3), parcourent une première région fonctionnelle (2) parallèlement et l'une à côté de l'autre, puis sont amenées parallèlement et l'une à côté de l'autre à une deuxième région fonctionnelle (8) équipée d'un entraínement à friction commun (8/1, 8/2), dans lequel la vitesse périphérique de la surface entraínant les bandes (4, 5) de l'entraínement à friction des bandes ne peut pas être différenciée, caractérisé par un dispositif de régulation (20) qui commande la circulation des bandes de support d'enregistrement (4, 5) en agissant sur le glissement de l'entraínement à friction (8/1, 8/2) de chacune des bandes de support d'enregistrement individuelles, le dispositif de régulation (20) comprenant :
    des moyens capteurs (12, 6/1, 6/2) qui captent un décalage relatif des bandes de support d'enregistrement (4, 5) l'une par rapport à l'autre dans la direction du transport dans une région comprise entre les deux régions fonctionnelles (2, 8),
    des moyens de réglage (7, 18, 19) qui règlent le glissement de chacune des bandes de support d'enregistrement individuelles (4, 5) dans l'entraínement à friction (8) de la deuxième région fonctionnelle (9),
    des moyens de régulation (20, 21, 22) reliés aux moyens capteurs (12, 6/1, 6/2) et aux moyens de réglage (7, 18, 19), destinés à la compensation du décalage relatif, et
       les bandes de support d'enregistrement (4, 5) présentant au moins un accumulateur de bande (6) pour le support d'enregistrement (1), avec un capteur (12) qui capte l'état de remplissage de cet accumulateur.
  2. Dispositif selon la revendication 1, dans lequel aux bandes de support d'enregistrement (A, B), sont associés respectivement des tendeurs de boucle (6/1, 6/2), munis de capteurs (12) qui captent leur position angulaire.
  3. Dispositif selon la revendication 2, comprenant des tendeurs de boucle (6) qui sont construits de telle manière qu'ils dévient les bandes de support d'enregistrement (4, 5) avec une force de déviation réglable en fonction de leur position angulaire.
  4. Dispositif selon la revendication 3, comprenant des tendeurs de boucle qui présentent un élément déflecteur (25) muni d'un ressort déflecteur respectif (13), qui attaque les bandes de support d'enregistrement (4, 5) et qui peut pivoter autour d'un axe de rotation, le ressort déflecteur (13) étant relié à un dispositif de tension (33, 34) servant à régler la précontrainte du ressort.
  5. Dispositif selon une des revendications 2 à 4, dans lequel le dispositif de régulation (20) présente un premier groupe fonctionnel (17, 21) commandant le contenu des accumulateurs de bande (6) et qui influe dans le même sens sur le contenu des accumulateurs de bande (6) des bandes de support d'enregistrement (4, 5), par exemple, en faisant varier la vitesse de rotation de l'entraínement à friction (8), ainsi qu'un deuxième groupe fonctionnel (7) qui commande la différence des contenus des accumulateurs de bande et qui influe sur le contenu des accumulateurs de bande (6) l'un en sens inverse de l'autre, par exemple, en faisant varier la force de tension régnant dans la bande de support d'enregistrement (4, 5) correspondante.
  6. Dispositif selon une des revendications 2 à 5, comprenant des capteurs qui détectent des marquages présents sur les bandes de support d'enregistrement (4, 5).
  7. Dispositif selon une des revendications 2 à 6, comprenant un frein (7), disposé en amont de l'entraínement à friction (8), par référence au sens du transport des supports d'enregistrement, et qui peut être réglé pour la force de freinage qu'il exerce sur les bandes de support d'enregistrement (4, 5) respectives.
  8. Dispositif selon la revendication 7, dans lequel, à chacune des bandes de support d'enregistrement (4, 5) est associés un frein (7/1, 7/2) comportant une surface de glissement qui reçoit les bandes de support d'enregistrement (4, 5) et présente des ouvertures d'aspiration, laquelle surface est reliée à un dispositif (15) produisant une dépression réglable.
  9. Dispositif selon une des revendications 1 à 8, comprenant une région de report (2), une station de report constituant une première région fonctionnelle, et une station de fixage (8) constituant une deuxième région fonctionnelle.
  10. Dispositif selon une des revendications 1 à 9, comprenant un dispositif pouvant être commandé (18, 214, 218) servant à régler la force d'application exercée sur les bandes de support d'enregistrement (4, 5) dans l'entraínement à friction (8/1, 8/2).
  11. Dispositif selon la revendication 10, comprenant un rouleau de pression (205) monté mobile, qui applique les bandes de support d'enregistrement (4, 5) contre un rouleau d'entraínement (8/1, 201) de l'entraínement à friction, et un mécanisme (212, 218, 214) de réglage de force relié au rouleau de pression (205) pour faire varier la force d'application du rouleau de pression (205) dans la région des bandes de support d'enregistrement (4, 5) à un degré spécifique correspondant à chaque bande.
  12. Dispositif selon la revendication 11, comprenant des éléments ressorts (218) qui sont reliés à un dispositif de manoeuvre (214, 216) et reliés chacun à un élément de palier latéral (206) du rouleau de pression (205), de manière à appliquer le rouleau de pression (205) contre le rouleau conjugué (201) en égalisant la force dans une position zéro du dispositif de manoeuvre (214, 216), une excursion du dispositif de manoeuvre (214, 216) à partir de la position zéro déterminant une application de force aux éléments de paliers (206) qui est fonction de la position de manoeuvre.
  13. Dispositif selon une des revendications 1 à 10, dans lequel la deuxième région fonctionnelle présente un rouleau de fixage (8/1) muni d'un rouleau de pression correspondant (8/2) qui applique le support d'enregistrement (1) contre le rouleau de fixage (8/1), au moins un des rouleaux (8/1, 8/2) étant chauffé et entraíné par moteur.
  14. Dispositif selon une des revendications 11 et 12, dans lequel la deuxième région fonctionnelle présente un rouleau de fixage (8/1) jouant le rôle de rouleau d'entraínement, avec le rouleau de pression (8/2) correspondant qui applique le support d'enregistrement (1) contre le rouleau de fixage (8/1), au moins un des rouleaux (8/1, 8/2) étant chauffé et entraíné par moteur.
  15. Dispositif selon la revendication 13, seule aussi bien que dépendant directement de l'une des revendications 1 à 9, muni d'un dispositif pour une variation commandée du coefficient de frottement des rouleaux.
  16. Dispositif selon la revendication 15, dans lequel la variation du coefficient de frottement s'effectue par un apport commandé d'huile de séparation.
  17. Dispositif selon la revendication 9, comportant une station de fixage constituée par un dispositif de fixage éclair.
  18. Dispositif selon la revendication 9, comprenant une station de fixage constituée par un dispositif de fixage à radiateur.
  19. Dispositif selon une des revendications 1 à 18, comprenant des moyens (12, 2) associés au dispositif de régulation (20), à l'aide desquels un arrêt de synchronisation est déclenché en cas de dépassement d'une plage de régulation prédéterminée, arrêt pendant lequel il peut se produire une synchronisation du défilement parallèle des bandes de support d'enregistrement (4, 5) par décalage relatif des bandes de support d'enregistrement (4, 5), pour les placer dans une position synchrone.
  20. Dispositif selon la revendication 1, agencé dans un dispositif d'impression électrographique, destiné à imprimer sélectivement un support d'enregistrement en forme de bande (10) sur une face ou sur les deux faces, dans lequel le dispositif d'impression comprend :
    un support intermédiaire destiné à produire des images de toner correspondant à la face avant et/ou à la face arrière du support d'enregistrement (1) ;
    une station de report (2) comprenant une première région de report destinée à transférer une première image de toner sur une région de face avant du support d'enregistrement (1), et une deuxième région de report qui y est adjacente, destinée à transférer une autre image de toner sur la région de face avant ou sur une région de face arrière du support d'enregistrement (1), ainsi qu'un dispositif de transport (3) qui entraíne le support d'enregistrement par sûreté de forme dans les régions de report ;
    une station de fixage (8) placée en aval de la station de report (2), par référence au sens du transport du support d'enregistrement, et à laquelle est associé un entraínement à friction pour le support d'enregistrement (1), le support d'enregistrement (1) passant, dans une première bande de support d'enregistrement (4), en partant d'une région d'amenée et à travers la première région de report, jusqu'à la station de fixage (8), puis, de là, dans un état retourné par un dispositif de retournement (10), jusqu'à la deuxième région de report, pour l'impression de la région de la face arrière, puis passant de nouveau à travers la station de fixage (8) dans une deuxième bande de support d'enregistrement (5).
  21. Procédé pour produire un défilement sans défaut de bandes de support d'enregistrement (4, 5) dans un dispositif d'impression électrographique, dans lequel les bandes de support d'enregistrement (4, 5), entraínées conjointement et par sûreté de forme au moyen d'un dispositif d'entraínement (3), parcourent parallèlement et l'une à côté de l'autre une région de report (2), puis sont amenées, parallèlement et l'une à côté de l'autre, à une station de fixage (8) équipée d'un entraínement à friction commun (8/1, 8/2), dans lequel la vitesse périphérique de la surface entraínant les bandes (4, 5) de l'entraínement à friction des bandes (4, 5) ne peut pas être différenciée, caractérisé par les phases suivantes consistant à :
    capter un décalage relatif des bandes de support d'enregistrement (4, 5) l'une par rapport à l'autre dans la direction du transport, dans une région comprise entre la région de report (2) et la station de fixage (8),
    commander le glissement de l'entraínement à friction (8/1, 8/2) de chacune des bandes de support d'impression individuelles (4, 5) jusqu'à ce que le décalage relatif devienne inférieur à une valeur prédéterminée.
EP95936574A 1995-03-24 1995-10-30 Dispositif de synchronisation exacte du defilement parallele de supports d'enregistrement sous forme de bandes dans un dispositif d'impression electrographique Expired - Lifetime EP0815496B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95936574A EP0815496B1 (fr) 1995-03-24 1995-10-30 Dispositif de synchronisation exacte du defilement parallele de supports d'enregistrement sous forme de bandes dans un dispositif d'impression electrographique

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP95104420 1995-03-24
EP95104420 1995-03-24
EP95936574A EP0815496B1 (fr) 1995-03-24 1995-10-30 Dispositif de synchronisation exacte du defilement parallele de supports d'enregistrement sous forme de bandes dans un dispositif d'impression electrographique
PCT/EP1995/004265 WO1996030812A1 (fr) 1995-03-24 1995-10-30 Dispositif de synchronisation exacte du defilement parallele de supports d'enregistrement sous forme de bandes dans un dispositif d'impression electrographique

Publications (2)

Publication Number Publication Date
EP0815496A1 EP0815496A1 (fr) 1998-01-07
EP0815496B1 true EP0815496B1 (fr) 1999-01-20

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EP95936574A Expired - Lifetime EP0815496B1 (fr) 1995-03-24 1995-10-30 Dispositif de synchronisation exacte du defilement parallele de supports d'enregistrement sous forme de bandes dans un dispositif d'impression electrographique

Country Status (5)

Country Link
US (1) US6055408A (fr)
EP (1) EP0815496B1 (fr)
JP (1) JPH11502803A (fr)
DE (1) DE59504939D1 (fr)
WO (1) WO1996030812A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0890139B1 (fr) * 1996-03-29 2003-06-04 Océ Printing Systems GmbH Procede de commande du fonctionnement d'une imprimante, notamment de la mise en marche et de l'arret
US6377247B1 (en) * 1996-09-09 2002-04-23 Quad/Tech, Inc. Touch screen system for simulating web-up of a press line
JP2000203751A (ja) * 1999-01-13 2000-07-25 Hitachi Ltd 画像記録装置
JP2002068548A (ja) * 2000-08-29 2002-03-08 Minolta Co Ltd 連続紙搬送装置
US6494451B2 (en) * 2001-03-19 2002-12-17 Hewlett-Packard Company Anti-skew idler roller system
US6663304B2 (en) * 2002-01-30 2003-12-16 Hewlett-Packard Development Company, L.P. Simultaneously printing information on two sides of print media
JP4414244B2 (ja) * 2004-01-30 2010-02-10 株式会社リコー 印刷装置のウェブ搬送機構
JP5740970B2 (ja) * 2010-01-20 2015-07-01 株式会社リコー 印刷システム、印刷装置および搬送制御方法
CN117400596B (zh) * 2023-12-15 2024-03-19 江西德新达智能机械有限公司 一种制袋机

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JPS5824172A (ja) * 1982-05-28 1983-02-14 Canon Inc 記録装置
JPH0745495Y2 (ja) * 1988-02-24 1995-10-18 旭光学工業株式会社 連続記録紙を用いるプリンタの搬送異常検知機構
JP2859278B2 (ja) * 1988-03-02 1999-02-17 オーセ プリンテイング システムズ ゲゼルシャフト ミット ベシュレンクテル ハフツング 両面および片面動作のための枚葉紙ページプリンター
US5063416A (en) * 1989-06-13 1991-11-05 Asahi Kogaku Kogyo Kabushiki Kaisha Electrophotographic printer using a continuous-form recording sheet
US5323944A (en) * 1990-02-02 1994-06-28 Siemens Nixdorf Informationssysteme Ag Arrangement for the lateral positioning of a recording medium in a printer or photocopier
MY113259A (en) * 1990-10-03 2002-01-31 Kk Sato Xerographic apparatus for label printer
JP2896926B2 (ja) * 1990-10-03 1999-05-31 株式会社サトー ラベル印刷用静電記録装置
EP0665962B1 (fr) * 1992-10-22 1996-05-08 Siemens Nixdorf Informationssysteme Aktiengesellschaft Systeme de frein pneumatique pour un support d'enregistrement
WO1994027193A1 (fr) * 1993-05-19 1994-11-24 Siemens Nixdorf Informationssysteme Aktiengesellschaft Dispositif d'impression electrographique de supports d'enregistrement sous forme de bandes de differentes largeurs
DE4414733C1 (de) * 1994-04-27 1995-06-01 Siemens Nixdorf Inf Syst System und Verfahren zur Vermeidung von Schlupf beim Transport eines Aufzeichnungsträgers in einem elektrografischen Druck- oder Kopiergerät
EP0771436B1 (fr) * 1994-07-15 1999-07-07 Océ Printing Systems GmbH Dispositif d'impression multifonction pour imprimer des supports d'enregistrement se presentant sous forme de bandes
DE59400220D1 (de) * 1994-08-19 1996-05-23 Siemens Nixdorf Inf Syst Wendeeinrichtung für bandförmige Aufzeichnungsträger
US5713071A (en) * 1994-11-04 1998-01-27 Siemens Nixdorf Informationssysteme Aktiengesellschaft Multi-functional electrographic printer device

Also Published As

Publication number Publication date
EP0815496A1 (fr) 1998-01-07
US6055408A (en) 2000-04-25
JPH11502803A (ja) 1999-03-09
WO1996030812A1 (fr) 1996-10-03
DE59504939D1 (de) 1999-03-04

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