EP2018973B1 - Verfahren und Vorrichtung zum doppelseitigen Drucken - Google Patents

Verfahren und Vorrichtung zum doppelseitigen Drucken Download PDF

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Publication number
EP2018973B1
EP2018973B1 EP20070290933 EP07290933A EP2018973B1 EP 2018973 B1 EP2018973 B1 EP 2018973B1 EP 20070290933 EP20070290933 EP 20070290933 EP 07290933 A EP07290933 A EP 07290933A EP 2018973 B1 EP2018973 B1 EP 2018973B1
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EP
European Patent Office
Prior art keywords
path
recording medium
printing
recording media
output
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.)
Not-in-force
Application number
EP20070290933
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English (en)
French (fr)
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EP2018973B8 (de
EP2018973A1 (de
Inventor
Stefan Karner
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.)
Sagemcom Documents SAS
Original Assignee
Sagemcom Documents SAS
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 Sagemcom Documents SAS filed Critical Sagemcom Documents SAS
Priority to DE200760012230 priority Critical patent/DE602007012230D1/de
Priority to EP20070290933 priority patent/EP2018973B8/de
Priority to ES07290933T priority patent/ES2360098T3/es
Publication of EP2018973A1 publication Critical patent/EP2018973A1/de
Priority to HK09106895.4A priority patent/HK1128659B/en
Application granted granted Critical
Publication of EP2018973B1 publication Critical patent/EP2018973B1/de
Publication of EP2018973B8 publication Critical patent/EP2018973B8/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • 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

Definitions

  • the invention relates to a method for double-sided printing of recording media according to the precharacterising clause of claim 1.
  • the US 6 340 157 B discloses such a printing device for duplex printing.
  • Methods for double-sided printing of recording media comprising print units for one-sided printing are known, wherein after printing a first side of a sheet, the sheet is turned over and fed to the printing unit for a second time. The sheet is turned over in an output region or a reversing path provided for this purpose. In the process the sheet, once guided to the printing unit, is printed, turned over once, fed to the printing unit and printed again.
  • the drawback of this method is that the time for printing a sheet on both sides is lengthened compared with one-sided printing of two sheets, both the process of turning over and the renewed feeding of the sheet to the printing unit lengthening the time, and the number of printed pages per unit of time, i.e. the printing speed, which according to the invention is measured as the number of printed sheets per unit of time, considerably decreasing compared with just one-sided printing of recording media.
  • the object of the invention is therefore to disclose a method for double-sided printing of recording media of the type mentioned in the introduction, with which said drawbacks can be avoided and with which the printing speed decreases only slightly compared with one-sided printing or is the same.
  • Printing of recording media at substantially the same printing speed is thus ensured with the device, in particular the printer, comprising the printing unit for one-sided printing, in the case of one-sided as well as double-sided printing, it being possible for a user to choose between one-sided and double-sided printing of recording media simply and without mechanical intervention and in particular by way of an electronic control unit. Operation is thus simple and intuitive for a user, whereby the device is particularly suitable for home or office use.
  • a first side and a second side are thus likewise alternately printed in each case, the recording medium being output after printing of the second side, thus ensuring a substantially constant number of output recording media per unit of time.
  • the recording medium can be conveyed by means of a motor which drives all conveying rollers. This allows inexpensive configuration and production of the printer, only minor or no technical modifications to a printer for one-sided printing being required particularly in the case of motors for conveying the recording media and in the case of the printing unit.
  • the invention also relates to a device for double-sided printing of recording media according to the precharacterising clause of claim 8.
  • the object of the invention is furthermore to disclose a device for double-sided printing of recording media of the type mentioned in the introduction with which said drawbacks can be avoided and with which the printing speed decreases only slightly compared with one-sided printing or is the same.
  • the recording medium can thus be conveyed into the duplex path for the purpose of being returned after printing of the first side and can be guided into the output path for the purpose of being output after printing of the second side.
  • the recording medium situated in the duplex path and the further recording medium situated in the output path can thus be moved simultaneously and in different directions, in particular can be moved past each other, crossing or collision of the two recording media being prevented.
  • the recording media can thus be conveyed in the printer substantially constantly and continuously overall, conveying being possible by means of a common drive unit and it being possible to simplify control of conveying of recording media.
  • This allows inexpensive configuration and production of the printer, only minor or no technical modifications to a printer for one-sided printing being required particularly in the case of motors for conveying the recording media and in the case of the printing unit.
  • Fig. 1 to 5 show a method for double-sided printing of recording media 8, preferably sheets, comprising a printing unit 13 for one-sided printing, a recording medium, after printing of a first side, again being fed via a duplex path 6 to the printing unit 13 for printing of the second side, in which method it is proposed so the speed of printing decreases only slightly compared with one-sided printing that after a start phase between printing of the first side of one of the recording media 8, 83 and the second side of the same recording medium 8, 83, first of all the second side of the recording medium 8, 82 preceding the recording medium 8, 83 is printed and after the second side of the recording medium 8, 82 preceding the recording medium 8, 83 is printed, the first side of the recording medium 8, 84 following the recording medium 8, 83 is printed.
  • double-sided printing is taken to mean that a recording medium is printed once on one side on the first side and thereafter a second time on one side on the second side opposite the first, at least one print-free unit of time of this recording medium being provided in particular between an end time of the printing process of the first side and a start time of the printing process of the second side.
  • printing speed is taken to mean the number of individual printed pages per unit of time, wherein with double-sided printing, per recording medium 8, in particular paper, two pages per recording medium are printed.
  • double-sided printing per recording medium 8 in particular paper
  • twice as many recording media 8 than in the case of double-sided printing are guided and output to/at the ejection opening 31.
  • the printer comprising the printing unit 13 for one-sided printing
  • substantially the same printing speed is thus ensured in the case of one-sided and double-sided printing of recording media B.
  • a first side and a second side are thus likewise alternately printed in each case, the recording medium 8 being output after printing of its second side, thus ensuring a substantially constant number of output recording media 8 per unit of time.
  • This allows a substantially constant conveying speed of the recording medium in the device 1, whereby acceleration-induced stresses in the device 1 and in the recording media 8 can be avoided.
  • the number of motors used for conveying can in the process be kept low, the motor(s) driving the guide rollers, preferably by means of a gear. This makes inexpensive configuration and production of the printer and/or device 1 possible, only minor or no technical modifications to a device for one-sided printing being required particularly in the case of motors for conveying the recording media 8 and in the case of the printing unit 13.
  • the recording medium 8 is fed by means of a switching mechanism 2 either along an output path 4 to an ejection opening 41 for outputting the recording medium 8 or a reversing device 51 arranged along a reversing path 5 for reversing the direction of movement 9 of the recording medium 8.
  • the switching mechanism 2 can comprise an adjusting mechanism, a switching lever or an adjusting lever, for adjusting and switching the path of transport of the recording medium 8 after the printing unit 13. Two recording media 8 conveyed immediately one after the other can thus alternately be conveyed and guided to the two paths that are different from each other - the output path 4 or the reversing path 5.
  • Two recording media 8 situated immediately one after the other can thus particularly be guided to different paths - reversing path 5 and output path 4 - without intersecting, crossing or touching each other.
  • the recording medium 8 brought into the reversing device 5 thus does not hinder the recording medium 8, which is brought into the output path 4, immediately following it.
  • the printing speed in the case of double-sided printing can thus be substantially identical to the printing speed in the case of one-sided printing of the recording medium 8.
  • the reversing device 51 comprises duplex rollers 52 and the ejection opening 41 output rollers 42, and the output rollers 42 and the duplex rollers 52 comprise a common roller 43, and that the recording medium 8 is guided in the output path 4 and the reversing path 5 by means of the common roller 43.
  • This allows a particularly simple configuration and particularly simple construction of the device 1, in particular the printer.
  • the device can thus be particularly inexpensive to produce, it being possible to convert an existing device 1 for one-sided printing, in particular an existing printer model, by means of simple measures.
  • the recording media 8 can thus be guided in the output path 4 and the reversing path 5 by means of the driven, in particular common, roller 43.
  • the device 1 can thus be produced particularly inexpensively, it being possible to convert an existing driving mechanism for one-sided printing, in particular comprising a motor for conveying the recording media 8, by means of simple measures to double-sided printing.
  • the recording medium 8 in the duplex path 6 is guided at least in certain sections into the storage container 11 for providing the recording media 8.
  • An intake device 12 for recording media 8 in the storage container 11 and for recording media 8 issuing from the duplex path 6 can thus be used. This aids inexpensive production of the device 1 in particular, it being possible to substantially construct the intake device 12 and the printing unit 13 and a fixing unit 14 of the device 1 so as to be identical to the device for one-sided printing, i.e. a single-side printing device, of a recording medium 8.
  • Fig. 1 to 5 also show a device 1 for double-sided printing of recording media 8, preferably sheets, comprising a printing unit 13 for one-sided printing, at least one output path 4 for bringing the recording medium 8 from the printing unit 13 to an ejection opening 41 being arranged so as to adjoin the printing unit 13, and at least one duplex path 6 being provided for bringing the recording medium 8 from at least one reversing device 51 to the printing unit 13 for printing the second side, in which it is proposed, so the speed of printing, i.e. a printing speed, decreases only slightly compared with one-sided printing, that the at least one duplex path 6 and the at least one output path 4 are constructed so as to be separate.
  • the recording medium 8 can thus be conveyed into the duplex path 6 for the purpose of being returned after printing of the first side and can be guided into the output path 4 for the purpose of being output after printing of the second side.
  • the recording medium 8 situated in the duplex path 6 and the further recording medium 8 situated in the output path 4 can thus be moved simultaneously and in different directions, in particular can be moved past each other, crossing or collision of the two recording media 8 being prevented.
  • the recording media 8 can thus be conveyed in the device 1 substantially constantly and continuously overall, conveying being possible by means of a driving mechanism, comprising in particular an electric motor, and it being possible to simplify control of conveying of recording media 8.
  • a driving mechanism comprising in particular an electric motor
  • This allows inexpensive configuration and production of the device 1, only minor or no technical modifications to the device, particularly a printer, for one-sided printing being required particularly in the case of motors for conveying the recording media 8 and in the case of the printing unit 13.
  • At least one reversing path 5 branches off from the at least one output path 4 to the at least one reversing device 51, and that a switching mechanism 2 is provided for optional activation of the at least one output path 4 and the at least one reversing path 5. This ensures control of the recording media 8 in the direction of the output path 4 or in the direction of the reversing path 5, reliable control also being ensured with recording media 8 that immediately and quickly follow each other.
  • the at least one reversing path 5 forms part of at least one duplex path 6 and the at least one duplex path 6 is cleared by the switching mechanism when the at least one output path 4 is activated.
  • Two recording media 8 are thus highly reliably prevented from colliding in the region of the switching mechanism 2, and in particular a recording media 8 jam, in particular a paper jam, can be prevented.
  • the reversing device 51 comprises duplex rollers 52 and the ejection opening 41 output rollers 42 and that the output rollers 42 and the duplex rollers 52 comprise a common roller 43.
  • the device 1 can thus be particularly inexpensive to produce, it being possible to convert an existing device for one-sided printing, in particular an existing printer model, by means of simple measures.
  • An existing driving mechanism in particular the existing driving mechanism of a device for one-sided printing, can thus be converted by means of simple measures for double-sided printing.
  • a storage container 11 for providing the recording media 8 forms part of the duplex path 6.
  • the existing driving mechanism for one-sided printing can thus be converted by means of simple and inexpensive measures for double-sided printing.
  • Fig. 1 schematically shows in profile a device 1 for double-sided printing of recording media of a particularly preferred embodiment. Illustrated are: the storage container 11, a plurality of conveying rollers 7, the printing unit 13, a fixing unit 14, the control means 2, a printing path 3, the output path 4, the reversing path 5, the duplex path 6, control sensors 15, the duplex rollers 52, the output rollers 42 and the direction of movement 9 of the recording media 8 during operation of the device 1.
  • Fig. 1 the complete procedure of double-sided printing of one of the recording media 8 will be described, wherein for the purpose of simpler illustration further recording media 8 that are moved at the same time will not initially be considered.
  • This procedure corresponds to a double-sided print job which substantially constitutes a command and which in particular is formed as an external electronic pulse, for example a pulse of a computer, to continuously print a predetermined number of pages of a recording medium 8.
  • one of the plurality of recording media 8 situated in the storage container 11 is taken into the printing path 3 by an intake device 12 at the start of printing.
  • the recording medium 8 can alternatively be fed for example by means of a feeding chute or from one of a plurality of storage containers.
  • a plurality of storage containers 11 that are different from each other, in particular for recording media 8 of different sizes, areas, thicknesses and/or orientations, and at least one feeding chute for manually feeding the recording media 8, can advantageously also be provided, it being possible to form a plurality of intake devices 12 in the device 1.
  • the recording medium 8 is guided to the printing unit 13 and subsequently to the fixing unit 14, the printing procedure in this region of the device 1 being substantially identical to the printing procedure of a device 1 for one-sided printing.
  • the recording medium 8 is thereafter guided to the control means 2.
  • the control means 2 guide the recording medium 8 as a function of whether the recording medium 8 should be output or fed to the printing unit 13 again, either to the output path 4 or the reversing path 5. After printing of the first side of the recording medium 8 the recording medium 8 is in particular guided to the reversing path 5 and after printing of the second side of the recording medium 8 to the output path 4.
  • the duplex path 6, in which the recording medium is guided and conveyed by means of conveying rollers 7, can advantageously be constructed at least in certain sections in the region of the at least one storage container 11. Conveying of the recording medium 8 in the duplex path 6 can advantageously be guided at least in certain sections by means of the intake device 12 arranged in the region of the storage container 11, in particular in the printing path 3.
  • the duplex path 6 can be spaced apart from at least one supply container 11. This allows a particularly short duplex path 6 and the duration of guidance of the recording medium 8 in the duplex path 6 can thus be short.
  • the recording medium 8 is guided for a second time to the printing unit 13 and to the fixing unit 14, the printing sequence in this region of the printing path 3 being substantially identical to the printing sequence of a device for one-sided printed and the second side of the recording medium 8 being printed.
  • the recording medium 8 is conveyed a second time to the switching mechanism 2, the switching mechanism 2 guiding the recording medium 8 in the direction of the output path 4.
  • the recording medium 8 is conveyed onwards to the ejection opening 41 and output.
  • the recording medium 8 is guided entirely out of a path of movement of the recording medium 8, which substantially comprises the printing path 3, the reversing path 5, the duplex path 6 and the output path 4.
  • At least one control sensor 15 for controlling and positioning the recording medium 8 is advantageously provided in the device 1 and/or several recording media 8 one to each other. As shown in Fig. 1 a control sensor 15 can advantageously be constructed upstream of the printing unit 13 for example. Correct positioning of the recording medium 8 during printing of the first side and printing of the second side can thus be ensured. It may thus be ensured that printed lines on the first side and the second side are superimposed, a high quality imprint being ensured with a recording medium 8 printed on both sides and when looking through the recording medium 8.
  • a control sensor 15 can advantageously be constructed upstream of the switching mechanism 2 for example. Correct control of the switching mechanism 2 and the error probability can thus be reduced.
  • control sensors 15 instead of two control sensors 15 fewer or more control sensors may be formed and/or the control sensors 15 can be arranged in the device at a different position that is suitable for control, it being possible by means of advantageous arrangement of control sensors 15 to ensure good positioning of the recording medium during printing of the first side and printing of the second side as well as correct control of the switching mechanism 2 and to reduce the error probability.
  • Figures 2 to 5 schematically show in profile the device of Fig. 1 and a plurality of recording media 8, which are different from each other and are moved at the same time, in different snapshots after the start phase, which snapshots are described below, the progress of the method for printing the first side of one of the recording media 8, 83 through to printing of the second side of the same recording medium 8, 83 - including the further recording media 8 moved at the same time - being continuously shown.
  • the plurality of recording media 8 are shown in dot-dash lines, a first recording medium 81, a second recording medium 82, a third recording medium 83 and a fourth recording medium 84 being shown.
  • the difference in recording media 81 to 84 is used merely for the purpose of simpler illustration and is not evaluative.
  • Different recording media 8 with the same area and thickness and with different areas and thicknesses can be printed at the same time, in particular in one print job.
  • Figures 2 to 5 show different steps thereto and immediately successive steps of the preferred embodiment of the method respectively.
  • a different division of method steps i.e. division into individual steps, can also be chosen.
  • Fig. 2 schematically shows in profile the device of Fig. 1 and four recording media, which are different from each other, during a first step after the start phase.
  • the first recording medium 81 is situated in this case, i.e. during the first step, in the output path 4. It has already been printed on both sides and is ejected through the ejection opening 41.
  • the third recording medium 83 is in the process, i.e. in the meantime, printed on its first side and can then be guided in the direction of the switching mechanism 2 and in turn then by means of the switching mechanism 2 in the direction of the reversing path 5.
  • the second recording medium 82 is situated in this case in the duplex path 6 and is in contact with the intake device 12 and thus prepared for printing of the second side.
  • the fourth recording medium 84 is situated in the storage container in this case and is not yet involved in the procedure, in particular the printing procedure.
  • Fig. 3 shows a second immediately successive step - and the step shown in Fig. 2 - of the device 1 and method.
  • the first recording medium 81 has already been output and is situated in an output tray (not shown).
  • the second recording medium 82 is in the process, i.e. during the second step, printed on the second side and is situated in the printing path 3.
  • the third recording medium 83 is situated in the reversing path 5, approximately in an end position, in which the direction of movement 9 of the third recording medium 83 is reversed.
  • the fourth recording medium 84 is in the process prepared for capture by means of the intake device and for this purpose is in contact with the intake device which can be activated according to a predeterminable control signal.
  • Fig. 4 in turn shows a further, third step, this step immediately following the second step - shown in Fig. 3 .
  • the first recording medium 81 is still situated in the output tray.
  • the second recording medium 82 which has now been printed on both sides, is ejected in the process, i.e. during the third step.
  • the third recording medium 83 is situated in the region of the storage container 11 in the duplex path 6 and is in contact with the intake device 12, a predeterminable control signal controlling the intake of the third recording medium 83.
  • the fourth recording medium 84 is printed on its first side in the process and is situated in the printing path 3.
  • the third step shown in Fig. 4 is substantially identical to the first step shown in Fig.
  • Fig. 5 shows a fourth step, the fourth step immediately following the third step - shown in Fig. 4 .
  • the first recording medium 81 and the second recording medium 82 are brought into the output tray (not shown).
  • the third recording medium 83 is printed on its second side and is situated in the printing path 3 during the fourth step.
  • the fourth recording medium 84 is situated in the reversing path 5 shortly before, after or during reversal of the direction of movement 9 of the reversing device 51 and accordingly the reversal of the direction of movement 9 of the fourth recording medium 84.
  • the medium After printing the second side of the third recording medium 83 (not shown) the medium is conveyed by means of the switching mechanism 2, especially the adjusting lever, into the output path 4 and from there onwards to the ejection opening 41 and ejected at this location.
  • the complete printing process of the third recording medium 83 is thus concluded, wherein between printing of the first side of one of the recording media 8, 83 and the second side of the same recording medium 8, 83, the second side of the recording medium 8, 82 preceding the recording medium 83 is printed and after the second side of the recording medium 8, 82 preceding the recording medium 8, 83 is printed, the first side of the recording medium 8, 84 following the recording medium 8, 83 is printed.
  • the method shown in Fig. 2 to Fig. 5 is continuous, in the case of double-sided printing of recording media 8 a recording medium 9 being output substantially every time a page has been printed for a second time, and taking place after the start phase of the device 1.
  • the start phase forms the start of each independent print job.
  • a predetermined unit of time is inserted which substantially corresponds to at least the duration of a printing step, i.e. the step in which the recording medium 8 is in continuous contact with the printing unit 13 and a side of the recording medium 8 is thus fully printed.
  • At least one unit of time is thus substantially longer than the duration of the printing step no recording medium in contact with the printing unit 13, whereby a printing pause is formed.
  • a unit of time substantially longer than the duration of a printing step is a printing pause according to the invention.
  • the printing pause can in particular constitute substantially the only printing pause during a print job, the two - thus not immediately - successive recording media 8 - the recording medium 8 and the further recording medium 8 - having sufficient spacing from each other that the recording medium 8 printed first has left the reversing path completely and is completely disposed in the duplex path before the second printed, further recording medium 8 is guided into the region of the switching mechanism 2. This thus ensures that in the start phase the two recording media 8, which are consecutively conveyed in the reversing path, do not run into each other and/or touch each other.
  • the output rollers 42 and the duplex rollers 52 are arranged so as to cooperate, it being possible in particular for the output rollers 42 and the duplex rollers 52 - as shown in Fig. 1 - to comprise a common roller 43.
  • the three illustrated conveying rollers 7, the output rollers 42, the duplex rollers 52 and the common roller 43 are in mutual contact, in particular only one conveying roller 7, in particular the common roller 43, being constructed to be driven, and the other two conveying rollers 7 being constructed as co-running conveying rollers 7.
  • the output roller 42 and the duplex roller 52 are advantageously arranged so as to oppose the common roller 43, the mutually opposing output roller 42 and the duplex roller 52 in particular having the same direction of rotation.
  • the recording medium 8 can advantageously be guided in the output path 4 between the output roller 42 and the output roller 42 constructed as a common roller 43, and the recording medium 8 can be guided in the reversing path 5 between the duplex roller 52 constructed as a common roller 43 and the duplex roller 52.
  • one of the recording media B can particularly advantageously be guided in the output path 4 in the direction of the ejection opening 41 while at the same time a further one of the recording media 8 can be guided in the reversing path 5 in the direction of the duplex path 6.
  • the output path 4 and the reversing path 5 can in this case be adjacent to each other at least in certain sections and/or be substantially parallel, it being possible for the two recording media 8 to be moved past each other.
  • This allows good utilisation of the device 1 and in particular of the printing unit 13, it being possible for double-sided printing of recording media 8 to take place substantially at the same printing speed as one-sided printing of recording media 8.
  • the last recording medium 8 can advantageously be guided into the output path 4 as soon as the first side has been printed.
  • the return to the duplex path 6 and the second passage through the printing unit 13 is thus avoided, time is saved and the device 1 cleared more quickly for the next print job, whereby the efficiency of the device can be increased further.
  • a recording medium 8 which in particular has a different area and/or colour, is inserted between the recording media 8 of two print jobs, that the output tray is displaced in parallel and/or is rotated after the recording media 8 of a first print job have been output and before the recording media 8 of a second print job are output, that the recording media 8 of the different print jobs are output in a staggered manner and/or that the recording media 8 of different print jobs are output into different output trays.
  • the method is thus particularly suitable for double-sided printing of one to a large number of recording media 8 per print job and a large number of print jobs, it being possible to also print recording media 8 on one side in the device 1 without loss of efficiency or printing speed.
  • the print job With a print job comprising a plurality of pages of a document for printing, the print job - at least print job-internally and/or device-internally - beginning with page number one and with a constantly increasing page number extending to a predetermined page number, the printing sequence of the page numbers can advantageously be re-sorted, so the recording media 8 of a print job, printed on both sides, are output into the output tray with constantly increasing, sorting page numbers.
  • the higher of the two page numbers to be printed on a recording medium 8 is printed on the first side of the recording medium 8, i.e. before turning the recording medium 8 over, wherein it is in particular provided that the sequence of page numbers to be printed is basically increasing, i.e. each recording medium 8 following one of the recording media 8 is printed with higher page numbers than the recording medium 8. It may thus be ensured that with double-sided printing of recording media 8 the document, after being output into the output tray, is output with constantly increasing page numbers and in the correct sort order.
  • a reversed print sequence For the case where a reversed print sequence is chosen, with the print job - at least print job-internally and/or device-internally - beginning with a predetermined highest page number and with a constantly decreasing page number extending to page number one, it may advantageously be provided that the lower of the two page numbers to be printed on a recording medium 8 is printed on the first side of the recording medium 8, i.e. before the recording medium 8 is turned over, wherein it is in particular provided that the sequence of page numbers to be printed is basically decreasing, i.e. each recording medium 8 following one of the recording media 8 being printed with lower page numbers than the recording medium B. It may thus be ensured for the reversed print sequence as well that with double-sided printing of recording media 8, the document, after being output into the output tray, is output with constantly increasing page numbers and in the correct sort order.
  • the recording medium 8 printed first is guided into the reversing path 5, into the duplex path 6 and again into the printing path 3 and in the process is turned over, the second side of the recording medium 8 not being printed in the printing path 3, and is guided onwards into the output tray where it is output. It can thus be ensured that even when printing in the reversed print sequence and for an uneven number of page numbers that with double-sided printing of recording media 8 the document is output in the correct sort order.
  • a print image is produced on the page when printing a page of a recording medium 8.
  • the print image of the second side of the recording medium 8 is advantageously rotated by 180° in comparison with the print image of the first side of the same recording medium 8. It can thus be ensured that after the recording medium 8 printed on both sides has been output, [?] are arranged top and bottom on the first page and on the second page in the same region of the recording medium 8.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Counters In Electrophotography And Two-Sided Copying (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Handling Of Cut Paper (AREA)
  • Conveyance By Endless Belt Conveyors (AREA)

Claims (13)

  1. Verfahren zum beidseitigen Bedrucken von Aufzeichnungsmedien (8), umfassend ein drittes Aufzeichnungsmedium (83), ein zweites Aufzeichnungsmedium (82) und ein viertes Aufzeichnungsmedium (84) in einer Vorrichtung (1), die umfasst: einen Ausgabeweg (4), der zu einer Ausstoßöffnung (41) mit Ausgabewalzen (42) führt, eine Umkehrvorrichtung (51) mit Duplexwalzen (52), wobei die Umkehrvorrichtung (51) entlang eines Umkehrwegs (5) angeordnet ist, und eine Druckeinheit (13) zum einseitigen Drucken, wobei ein Aufzeichnungsmedium (8, 82, 83, 84) nach dem Bedrucken einer ersten Seite über einen Duplexweg (6) nochmals zur Druckeinheit (13) geführt wird, um die zweite Seite zu bedrucken, und wobei zwischen dem Bedrucken der ersten Seite des dritten Aufzeichnungsmediums (8, 83) und der zweiten Seite des gleichen dritten Aufzeichnungsmediums (8, 83)
    - die zweite Seite des zweiten Aufzeichnungsmediums (8, 82), das dem dritten Aufzeichnungsmedium (8, 83) vorangeht, bedruckt wird und
    - danach die erste Seite des vierten Aufzeichnungsmediums (8, 84), das dem dritten Aufzeichnungsmedium (8, 83) folgt, bedruckt wird,
    dadurch gekennzeichnet, dass die Aufzeichnungsmedien (8, 82, 83, 84) im Ausgabeweg (4) und im Umkehrweg (5) durch eine gemeinsame Walze (43) geführt werden, die als eine der Ausgabewalzen und eine der Duplexwalzen funktioniert, so dass das Aufzeichnungsmedium (8) im Ausgabeweg (4) zwischen der gemeinsamen Walze (43) und der anderen der Ausgabewalzen (42) und im Umkehrweg (5) zwischen der gemeinsamen Walze (43) und der anderen der Duplexwalzen (52) geführt wird, und dass, während eines der Aufzeichnungsmedien (8, 82, 83, 84) im Ausgabeweg (4) in Richtung der Ausstoßöffnung (41) geführt wird, gleichzeitig ein weiteres der Aufzeichnungsmedien (8, 82, 83, 84) im Umkehrweg (5) in Richtung des Duplexwegs (6) geführt wird, wobei das eine Aufzeichnungsmedium (8, 82, 83, 84) und das weitere Aufzeichnungsmedium (8, 82, 83, 84) aneinander vorbei bewegt werden.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass nach der Druckeinheit (13) die Aufzeichnungsmedien (8, 82, 83, 84) mit Hilfe eines Umschaltmechanismus (2) wie folgt geführt werden: entweder entlang des Ausgabewegs (4) zur Ausstoßöffnung (41), um die Aufzeichnungsmedien (8, 82, 83, 84) auszugeben, oder zur Umkehrvorrichtung (51), die entlang eines Umkehrwegs (5) angeordnet ist, um die Bewegungsrichtung (9) der Aufzeichnungsmedien (8, 82, 83, 84) umzukehren.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass während der Beförderung eines der Aufzeichnungsmedien (8, 82, 83, 84) im Duplexweg (6) ein weiteres der Aufzeichnungsmedien (8, 82, 83, 84) von der Druckeinheit (13) zur Ausstoßöffnung (41) geführt wird.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass während der Beförderung eines der Aufzeichnungsmedien (8, 82, 83, 84) im Duplexweg (6) ein anderes der Aufzeichnungsmedien (8, 82, 83, 84) von einem Vorratsbehälter (11) zur Druckeinheit (13) geführt wird, um die Aufzeichnungsmedien (8, 82, 83, 84) bereitzustellen
  5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Aufzeichnungsmedien (8, 82, 83, 84) im Duplexweg (6) auf wenigstens einigen Abschnitten in einen Vorratsbehälter (11) geführt werden, um die Aufzeichnungsmedien (8, 82, 83, 84) bereitzustellen.
  6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass nur eine der Ausgabewalzen (42) und der Duplexwalzen (52) angetrieben wird.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass nur die gemeinsame Walze (43) angetrieben wird.
  8. Vorrichtung (1) zum beidseitigen Bedrucken von Aufzeichnungsmedien (8, 82, 83, 84), umfassend eine Druckeinheit (13) zum einseitigen Bedrucken, mindestens einen Ausgabeweg (4), um die Aufzeichnungsmedien (8, 82, 83, 84) von der Druckeinheit (13) zu einer Ausstoßöffnung (41) mit Ausgabewalzen (42) zu bringen, die derart angeordnet sind, dass sie an die Druckeinheit (13) angrenzen, mindestens eine Duplexwalzen (52) umfassende Umkehrvorrichtung (51), die entlang eines Umkehrwegs (5) angeordnet ist, um die Bewegungsrichtung (9) der Aufzeichnungsmedien (8, 82, 83, 84) umzukehren, und mindestens einen Duplexweg (6), der vorgesehen ist, um die Aufzeichnungsmedien (8, 82, 83, 84) ein zweites Mal von der mindestens einen Umkehrvorrichtung (51)zur Druckeinheit (13) zu bringen, wobei der mindestens eine Duplexweg (6) und der mindestens eine Ausgabeweg (4) getrennt voneinander gebildet sind, dadurch gekennzeichnet, dass eine der Ausgabewalzen (42) und eine der Duplexwalzen (52) als gemeinsame Walze (43) ausgebildet ist, dass die andere der Ausgabewalzen (42) und die andere der Duplexwalzen (52) derart angeordnet sind, dass sie der gemeinsamen Walze (43) gegenüberliegen, und dass der Ausgabeweg (4) und der Umkehrweg (5) im Wesentlichen parallel sind, so dass zwei der Aufzeichnungsmedien (8, 82, 83, 84) aneinander vorbei bewegt werden können.
  9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass mindestens ein Umkehrweg (5) von dem mindestens einen Ausgabeweg (4) zu der mindestens einen Umkehrvorrichtung (51) hin abzweigt und dass ein Umschaltmechanismus (2) vorgesehen ist, um den mindestens einen Ausgabeweg (4) und den mindestens einen Umkehrweg (5) optional zu betätigen.
  10. Vorrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass der mindestens eine Umkehrweg (5) einen Teil des mindestens einen Duplexwegs (6) bildet und der mindestens eine Duplexweg (6) durch den Umschaltmechanismus (2) deaktiviert wird, wenn der mindestens eine Ausgabeweg (4) aktiviert wird.
  11. Vorrichtung nach Anspruch 8, 9 oder 10, dadurch gekennzeichnet, dass nur eine der Ausgabewalzen (42) und der Duplexwalzen (52) angetrieben wird.
  12. Vorrichtung nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, dass nur die gemeinsame Walze (43) angetrieben wird.
  13. Vorrichtung nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, dass ein Vorratsbehälter (11) zur Bereitstellung der Aufzeichnungsmedien (8, 82, 83, 84) einen Teil des Duplexwegs (6) bildet.
EP20070290933 2007-07-24 2007-07-24 Verfahren und Vorrichtung zum doppelseitigen Drucken Not-in-force EP2018973B8 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE200760012230 DE602007012230D1 (de) 2007-07-24 2007-07-24 Verfahren und Vorrichtung zum doppelseitigen Drucken
EP20070290933 EP2018973B8 (de) 2007-07-24 2007-07-24 Verfahren und Vorrichtung zum doppelseitigen Drucken
ES07290933T ES2360098T3 (es) 2007-07-24 2007-07-24 Método y dispositivo para impresión a doble cara.
HK09106895.4A HK1128659B (en) 2009-07-27 Method and device for double-sided printing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20070290933 EP2018973B8 (de) 2007-07-24 2007-07-24 Verfahren und Vorrichtung zum doppelseitigen Drucken

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Publication number Priority date Publication date Assignee Title
DE23190822T1 (de) 2016-01-08 2024-04-25 Entrust Corporation Kartendruckmechanismus mit kartenrückweg
DE102024104575A1 (de) 2024-02-19 2025-08-21 Mb Automation Gmbh & Co. Kg Verfahren und Vorrichtung zum ein- oder beidseitigen Bedrucken von Druck-Medien

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Publication number Priority date Publication date Assignee Title
JPS5992861A (ja) * 1982-11-16 1984-05-29 Konishiroku Photo Ind Co Ltd 両面複写機
EP0841601A1 (de) * 1996-10-08 1998-05-13 Océ-Technologies B.V. Verfahren zur Planung der Druckseitenabfolge in einem zweiseitigen Drucker
JP3352979B2 (ja) * 1999-07-16 2002-12-03 松下電送システム株式会社 記録装置
KR100412494B1 (ko) * 2001-09-29 2003-12-31 삼성전자주식회사 인쇄기의 용지 이송장치 및 이송방법
US7130574B2 (en) * 2004-03-26 2006-10-31 Lexmark International, Inc. Image forming device with multimode duplexer
JP4605386B2 (ja) * 2005-11-30 2011-01-05 ブラザー工業株式会社 画像記録装置
KR100729625B1 (ko) * 2005-12-26 2007-06-19 삼성전자주식회사 양면화상형성장치 및 양면화상형성방법

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ES2360098T3 (es) 2011-05-31
EP2018973B8 (de) 2011-03-23
EP2018973A1 (de) 2009-01-28
HK1128659A1 (en) 2009-11-06

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