EP0436147A2 - Dispositif pour l'impression sur les deux faces de feuilles - Google Patents

Dispositif pour l'impression sur les deux faces de feuilles Download PDF

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Publication number
EP0436147A2
EP0436147A2 EP90123635A EP90123635A EP0436147A2 EP 0436147 A2 EP0436147 A2 EP 0436147A2 EP 90123635 A EP90123635 A EP 90123635A EP 90123635 A EP90123635 A EP 90123635A EP 0436147 A2 EP0436147 A2 EP 0436147A2
Authority
EP
European Patent Office
Prior art keywords
sheet
unit
printer
sheets
sweeping
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.)
Withdrawn
Application number
EP90123635A
Other languages
German (de)
English (en)
Other versions
EP0436147A3 (en
Inventor
Albert Rutishauser
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.)
Rutishauser Data AG
Original Assignee
Rutishauser Data AG
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 Rutishauser Data AG filed Critical Rutishauser Data AG
Publication of EP0436147A2 publication Critical patent/EP0436147A2/fr
Publication of EP0436147A3 publication Critical patent/EP0436147A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/103—Sheet holders, retainers, movable guides, or stationary guides for the sheet feeding section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/60—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material

Definitions

  • the invention relates to an arrangement according to the preamble of claim 1.
  • printers that are used for the independent transport of a sheet from a conveyor shaft through a printing unit to a removal shaft and thereby output the sheet printed on one side
  • devices which enable printing on both sides of a sheet without manual reversal before printing on the second side .
  • printer devices require a comparatively large amount of space, and since double-sided printing is not the rule in most applications, the constant additional space requirement is perceived as annoying.
  • the object of the invention is therefore to enable the independent sweeping of sheets to be printed on both sides while avoiding this disadvantage.
  • the unit can also be procured retrospectively and attached to the printer without further adaptation. After completing the corresponding printing task, the unit can be removed again and used on another corresponding printer.
  • the application of the invention is particularly advantageous where the or one of the delivery chutes and the or one of the removal chutes are accessible on the same side of the printer housing. If the printer also has both a second feed chute and a second removal chute, alternative operating modes also result with the unit attached, both with regard to the selection of sheet material and the type of printing. Printers with two feeder trays and two removal trays are known and are on the market.
  • the invention also creates the possibility of using e.g. convert existing printers at the user's own facility for double-sided printing of sheets.
  • the unit upstream of the sweeping arrangement contains a controllable branch, and a sheet deposit in the second branch. This makes it possible, without resorting to special software, to store the sheets printed on both sides in a logical position of the pages, i.e. with the back of the last printed sheet uppermost, in this sheet tray.
  • controllable branching has a sheet tray movable between two positions, which in one position leaves the path from the removal shaft to the reversing arrangement and in the second position catches the sheets from the printing unit.
  • the housing 2 denotes the housing of a laser printer, which has a printing unit indicated at 4.
  • a sheet magazine 8 accessible from the front 6 thereof and designed as a drawer, which is assigned to a conveyor shaft 10.
  • a sheet tray 18 is assigned to the removal shaft 14 opening out at the top 16 of the housing 2.
  • the housing 2 has a sheet inlet 21 on its underside 20, which also opens into the connecting track 11.
  • the conveying path 12 has a branch 28, which can be controlled by a flap 30 which can be moved between two layers (only one is shown).
  • the flap 30 can be switched over by means not shown, for example a manually actuable lever.
  • the branching 28 connects the conveyor path 12 in the flap position shown with a removal shaft 32 opening out at the front 6, to which a storage basket (not shown) attached to the outside of the housing 2 is removably assigned. Both the removal shaft 16 and the removal shaft 32 are associated with a known pair of rollers 34 and 36 which serve for sheet conveyance.
  • the discharge chutes 10 and 22 are assigned unilaterally flattened discharge rollers 10a and 22a, respectively, which, in the rest position, allow one or more sheets shown to enter the chute.
  • the printing unit 4 is supplied with a sheet from one of the magazines 8 or 26 at the request of this connected data processing device, which sheet is then printed on one side and reaches one of the removal shafts 16 or 32, depending on the position of the flap 30 and depending on whether the sheet is to be placed with its printed side up or down.
  • a laser printer as described above is known and is on the market.
  • the printer shown is equipped with a unit 40 according to the invention, which enables sheets to be printed on both sides or back.
  • the unit 40 which is detachably attached to the front 6 of the housing 2 in a manner not shown, has a box 42 which is open towards this front.
  • the box 42 contains a controllable branch 46 in the vicinity of the pair of rollers 36
  • the branching 46 is formed by a support 50 which is pivotably mounted at 48 and a deflecting surface 52 fastened thereon.
  • An eccentric 54 (FIG. 1) is operatively connected to the carrier 50, which carries a sheet tray 56, which is coupled to an electric drive motor, not shown.
  • the sweeping arrangement 44 is connected to the branch 46 via a branch 58 and has a sheet outlet 60 equipped with a pair of conveying rollers 62 which opens into the housing 2 via the sheet magazine 8.
  • the sweeping arrangement 44 has a sweeping roller 64 which can be driven in two directions, with pressing rollers 66 and 68, to which a sweeping section 70 which extends in a semicircular shape is connected. Since the sweeping section 70 runs approximately around the sweeping roller 64, this takes up little space in the box 42.
  • An electric drive motor (not shown) connected to the sweeping roller 64, like the drive motor of the eccentric 54, is subject to the control of a software controller.
  • an empty sheet is fed in a known manner from the sheet magazine 26 via the feed shaft 22 into the connecting web 11 and fed to the printing unit 4.
  • the sheet printed on its front side is conveyed through the removal shaft 32 to the branch 46.
  • the carrier 50 Based on a software command corresponding to the two-sided printing, the carrier 50 has assumed the upper end position shown in FIG. 2, so that the sheet is fed from the deflecting surface 52 via the branch 58 to the sweeping arrangement 44.
  • the sweeping roller 64 draws in the sheet and conveys it into the sweeping section 70 until its trailing edge is released by the pressure roller 66.
  • the sweeping roller 64 is reversed, as a result of which the sheet, with its trailing edge ahead, is fed to the sheet outlet 60 or the pair of conveying rollers 62 there.
  • the pair of conveyor rollers 62 feed the sheet to the conveyor shaft 10, from where it is normally reinserted directly into the connecting path 11.
  • the sheet in printing unit 4 is now printed on its back, the data being transmitted to the printing unit in such a way that the sheet is printed from bottom to top.
  • the sheet printed on its rear side is in turn fed to the removal shaft 32.
  • the carrier 50 since the carrier 50 has been pivoted into its lower end position according to FIG. 1 as a result of a corresponding software command, this is achieved Branch 46 through the sheet into the sheet tray 56.
  • the last printed second side is turned up. Further sheets passed through the printer and the unit 40 are placed in the same position in the sheet tray 56, irrespective of whether they were printed in both passes through the printing unit or whether only the front was printed. In the case of a text comprising several pages, for example, this results in the sheets not only being in the sheet filing in ascending order from bottom to top, but also that a text page on a subsequent sheet is facing the immediately preceding text page.
  • the text printed on both sides in this way is therefore stored in a correct sheet and page sequence for stapling or arranging.
  • the unit allows a large number of single-sided printed sheets to be processed efficiently.
  • the carrier 50 initially remains in the upper end position after the passage of a sheet printed on one side.
  • Each sheet that has passed through the sweeping arrangement 44, as described, is interrupted when it reaches the feed shaft 10.
  • the sheet is temporarily stored in sheet magazine 8. If all the sheets removed from the sheet magazine 26 are printed on one side in this way and stored in magazine 8, then further software commands cause the carrier 50 to be lowered into the lower end position and the individual sheets are removed from the magazine 8 Trailing edge first fed to the printer for printing on the second side. Then the double-sided is printed Sheet is conveyed via the branch 46 into the sheet tray 56.
  • the alternative mode of operation therefore allows the sheet pages to be printed serially.
  • the sheet magazine 8 also makes it possible to dispense with the box 24 and also to work with a sheet supply contained in the former for double-sided printing. In this context, it may be expedient to make the separation corners usually present on this sheet magazine only effective for sheet removal.
  • the sheet magazine 80 shown in FIGS. 3, 4 and 5 is shown inserted into the printer instead of the magazine 8. Parts of the front 6 are indicated schematically in FIGS. 3 and 5.
  • the sheet magazine 80 designed as a rectangular drawer contains a sheet stack 82 which rests on a base 86 supported by springs 84 in a known manner. With 88 separation corners are designated, which are attached to the side 90 of the sheet magazine.
  • the deflection members 96 extend on both sides outside the effective width of the take-off roller 100, which corresponds to the take-off roller 10a in FIGS. 1 and 2 and is assigned to the conveyor shaft designated 110 here.
  • the flattened removal roller is located 100 in the rotary position according to FIG. 5.
  • the sheet 102 therefore comes to rest in the feed shaft 110 between the draw-off roller 100 and the sheet magazine 80 on the deflecting members 96. Thanks to the covering of the separating corners 88 by the deflecting members 96, these are ineffective for the sheet lying thereon. Accordingly, the next time the take-off roller 100 rotates, the sheet is taken along without hindrance by these separation corners.
  • the deflection members 96 do not hinder the removal of sheets from the sheet magazine 80 due to the flexibility of the former. Specifically, the deflection members 96 are lifted off the separation corners 88 when the top sheet 104 of the sheet stack 82 bends under the action of the rotating take-off roller 100 (FIG. 3). The sheet 104 can then skip the separation corners 88 freely and be fed to the printing unit.
  • the printer is used for double-sided printing on sheets and that the unit can be used on the printer shown without any major interventions and changes, using openings already present on the printer.
  • the connections necessary for the transmission of the software commands to the unit 40 do not have to be routed through the printer, but can be routed directly to the central unit controlling the printer.
  • the concept described can also be implemented directly in the printer itself.
  • the advantage can be that the sheet or magazines on the same side of the Printer as the sheet tray for printed sheets is located, that is, on the operating side of the same, are preserved.
  • a manually operated insertion slot can be provided or lead to the conveyor shaft 10.

Landscapes

  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Conveyance By Endless Belt Conveyors (AREA)
EP19900123635 1990-01-05 1990-12-08 Arrangement for printing on both sides of sheets Withdrawn EP0436147A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4290A CH681364A5 (fr) 1990-01-05 1990-01-05
CH42/90 1990-01-05

Publications (2)

Publication Number Publication Date
EP0436147A2 true EP0436147A2 (fr) 1991-07-10
EP0436147A3 EP0436147A3 (en) 1992-01-02

Family

ID=4178013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900123635 Withdrawn EP0436147A3 (en) 1990-01-05 1990-12-08 Arrangement for printing on both sides of sheets

Country Status (3)

Country Link
EP (1) EP0436147A3 (fr)
CH (1) CH681364A5 (fr)
DE (1) DE9017160U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10101563A1 (de) * 2001-01-15 2002-08-01 Wincor Nixdorf Gmbh & Co Kg Vorrichtung zur Abgabe oder Entgegennahme von Einzelblättern
EP1321402A1 (fr) * 2001-12-20 2003-06-25 Mars Inc. Appareil de maniement de documents de valeur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2763021B1 (fr) * 1997-05-06 1999-07-16 Sagem Procede d'impression recto verso dans une imprimante et telecopieur pour la mise en oeuvre du procede

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492371A (en) * 1980-02-22 1985-01-08 Canon Kabushiki Kaisha Feeding device
US4327905A (en) * 1980-09-30 1982-05-04 Sperry Corporation Duplex copying apparatus
DE3113658A1 (de) * 1981-04-04 1982-12-23 Canon K.K., Tokyo Verfahren zur herstellung von zweiseitigen mehrfachkopien sowie geraet zur durchfuehrung des verfahrens
JPS59191071A (ja) * 1983-04-13 1984-10-30 Toshiba Corp 給紙装置
JPS608861A (ja) * 1983-06-29 1985-01-17 Fuji Xerox Co Ltd 両面複写機
US4766467A (en) * 1985-11-28 1988-08-23 Mita Industrial Co. Ltd. Electrostatic copying apparatus and auxiliary unit capable of being detachably mounted thereon
JPS6488563A (en) * 1987-09-30 1989-04-03 Mita Industrial Co Ltd Auxiliary unit operated freely attachably/detachably for image generating machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10101563A1 (de) * 2001-01-15 2002-08-01 Wincor Nixdorf Gmbh & Co Kg Vorrichtung zur Abgabe oder Entgegennahme von Einzelblättern
US7159861B2 (en) 2001-01-15 2007-01-09 Wincor Nixdorf International Gmbh Device for the delivery or receipt of individual sheets
EP1321402A1 (fr) * 2001-12-20 2003-06-25 Mars Inc. Appareil de maniement de documents de valeur
US7100913B2 (en) 2001-12-20 2006-09-05 Mars Incorporated Value sheet handling apparatus

Also Published As

Publication number Publication date
EP0436147A3 (en) 1992-01-02
CH681364A5 (fr) 1993-03-15
DE9017160U1 (de) 1991-03-14

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