EP0123310B1 - Alimentation en feuilles et en bandes pour imprimantes - Google Patents

Alimentation en feuilles et en bandes pour imprimantes Download PDF

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Publication number
EP0123310B1
EP0123310B1 EP84104582A EP84104582A EP0123310B1 EP 0123310 B1 EP0123310 B1 EP 0123310B1 EP 84104582 A EP84104582 A EP 84104582A EP 84104582 A EP84104582 A EP 84104582A EP 0123310 B1 EP0123310 B1 EP 0123310B1
Authority
EP
European Patent Office
Prior art keywords
paper
tractor
platen
feeding device
drive wheel
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
EP84104582A
Other languages
German (de)
English (en)
Other versions
EP0123310A2 (fr
EP0123310A3 (en
Inventor
Johann Ing. Grad Giesinger
Heinz Dip.-Ing. Stickel (Fh)
Günter Ing. grad Christoph
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0123310A2 publication Critical patent/EP0123310A2/fr
Publication of EP0123310A3 publication Critical patent/EP0123310A3/de
Application granted granted Critical
Publication of EP0123310B1 publication Critical patent/EP0123310B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/48—Apparatus for condensed record, tally strip, or like work using two or more papers, or sets of papers, e.g. devices for switching over from handling of copy material in sheet form to handling of copy material in continuous form and vice versa or point-of-sale printers comprising means for printing on continuous copy material, e.g. journal for tills, and on single sheets, e.g. cheques or receipts
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0045—Guides for printing material
    • B41J11/005—Guides in the printing zone, e.g. guides for preventing contact of conveyed sheets with printhead
    • 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
    • B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/16—Means for tensioning or winding the web

Definitions

  • the invention relates to a paper transport device according to the preamble of patent claim 1.
  • Paper transport devices of the type mentioned are generally known and have been used successfully.
  • US-A-4 360 279 describes a paper transport device for printing devices for the alternative transport of single sheets and continuous paper.
  • the paper transport device has a motor-driven roller, which forms a roller pairing with a pressure roller, depending on the latching connection of a pivotably mounted actuating lever with a driving pin. Due to the rollers rolling together, the single sheets are fed to a print head with the aid of a positionable paper guide having a paper stop edge and, after printing, are output via the paper guide.
  • the continuous paper is fed from a paper tractor via an inlet channel to the printhead and, after the printing process, taken over by the rollers that roll with one another and output.
  • a common drive device is provided for driving the roll and the paper tractor, which controls the paper feed speed of the paper tractor and the roll as a function of signals from a control device. The feed speed of the roll is preferably greater than the preferred speed of the paper tractor.
  • DE-PS-3 149 667 describes an attachable transport device for edge-perforated recording media, which is placed on a printer intended for single sheets and contains a tractor drive. Both the single sheets and, if necessary with the transport device attached, the continuous paper are guided through a common paper channel around the platen roller.
  • the tractor drive is designed so that the continuous paper is drawn over the paper roller.
  • the continuous paper and also the individual sheets are guided around the platen roller in the above-mentioned printing devices in the paper guide channel via paper pressure rollers. The individual rolls are engaged both in continuous paper operation and in single sheet operation.
  • feeders PCT WO 82/03823
  • PCT WO 82/03823 automatic feed devices for single sheets.
  • These cassettes with devices containing storage paper are connected upstream of the continuous paper transport device in the printing device. From this, the paper to be printed is automatically removed as required and fed to the printing device or the paper roll.
  • a motor-driven paper motor is provided downstream of the platen in the transport direction of the paper.
  • a transport device for paper webs, forms, cards and the like in a printing device is also known from DE-OS 2 642 818.
  • the device has in front of the print head with a fixed platen, an infeed path for single sheets and an infeed path for continuous paper, a tractor drive is provided in the infeed path for continuous paper, which is operated in cycles. Downstream of the print head, take-off rollers are arranged in the paper channel, which are driven via a kind of electromagnetic clutch so that the paper to be written is held under tension during the cycle breaks of the paper tractor.
  • Such a device is not suitable for use in line printers with a motor-driven platen roller because of its complicated structure with a fixed platen.
  • the object of the invention is to design a paper transport device of the type mentioned in such a way that both single sheets and continuous paper can be optimally printed without the function and thus the printed image deteriorating during the transition from single sheet operation to continuous paper operation or vice versa.
  • the arrangement of a motor-driven paper tractor which determines the feed speed of the paper in the inlet channel for continuous paper, in conjunction with the increased feed speed of the paper roll compared to the feed speed of the paper tractor, enables the continuous paper to be fed in without jams.
  • the drive for the platen roller and the drive for the paper tractor is designed to be switchable in dependence on the single sheet or continuous paper operating mode in such a way that the paper roller is operated in the single sheet operating mode at a first peripheral speed determining the paper feed speed, and in that the paper roller If the continuous paper mode is operated with a second peripheral speed that deviates from the first peripheral speed and is slightly greater than the feed speed of the paper tractor that then determines the paper feed speed, there may be no malfunctions or vice versa during the transition from continuous paper operation to single sheet operation or vice versa Deterioration in print quality is coming. This transition can take place very quickly, and in the operation with single sheets, the continuous paper is placed in the waiting position in the paper holder in front of the platen roller. When changing the operating mode, the continuous paper is fed automatically.
  • the paper transport device for a typewriter or office machine shown schematically in FIG. 1, contains a motor-driven platen roller 1 which, for example, corresponds to the progress of the line-by-line printing. B. moved over a needle printhead, not shown here (mosaic printhead). In the area of the impression point, the recording medium B is smoothed over a resilient pressure bar 2.
  • the printing device shown is suitable for operation with single sheets as well as for operation with continuous paper. For this purpose, two inlet channels for continuous paper and single sheets open into the paper guide channel partially surrounding the platen roller 1.
  • the first inlet channel for continuous paper 3, which tangentially escapes from the platen roller and ends in the paper guide channel, consists of a paper guide plate 3/1 arranged at a distance from the platen roller, in the extension of which a paper tractor 4 is arranged, which represents the actual drive of the continuous paper A having perforations at the edges and whose feed speed is Continuous paper A paper feed speed determined.
  • the paper pressure rollers are arranged in a known manner in a line parallel to the platen axis 1 and can sit on a common axis. They are resiliently mounted and press the recording medium against the platen roller 1 under the action of a corresponding spring force 6. In the areas of the pressure roller 5, the paper guide plate 3/1 is interrupted by recesses 3/2.
  • the paper In operation with continuous paper A, the paper is transported by the clocked tractor along the paper guide plate 3/1 until it is pressed against the platen roller 1 by the pressure rollers 5 and is thus grasped by the platen roller 1.
  • the continuous paper is transported together by the tractor 4 and the platen roller 1, but the paper transport speed is determined by the feed speed of the tractor 4. So that no paper loops can arise between the platen roller and the tractor, the peripheral speed of the platen roller is slightly greater than the feed speed of the tractor 4, which can be brought about by a transmission described later or by an electronic control circuit (not shown here). This ensures that the continuous paper A is transported around the platen under tension. Since the tractor 4 is the element determining the feed, a slip must occur between the paper roller 1 and the continuous paper A.
  • the pressure force 6 of the pressure rollers 5 is therefore designed so that the paper can still slip on the platen roller 1 but is nevertheless safely carried along by the paper roller. This means that the pressure force must be adjusted according to the paper / platen roller friction pairing.
  • the position of the paper pressure rollers 5, which in this case are arranged on a common axis, is determined so that the continuous paper A is easily pushed by the tractor 4 in the area formed by the paper guide plate 3/1 and the circumference of the platen roller 1, referred to as the roller wedge can be.
  • a second inlet channel 7 is provided in order to also be able to transport single sheets B in the paper transport device.
  • This inlet channel 7 is arranged in the transport or circumferential direction of the paper roll in front of the first inlet channel 3 and is located below a known automatic guide device for single sheets, not shown here, from which the single sheets B are removed one after the other in printing operation.
  • the second inlet channel 7 for single sheets contains a plurality of pressure rollers 8 arranged one behind the other, only one of which is shown here, and which press the single sheet to be inserted against the platen roller 1 under a spring force 9.
  • a paper guide plate 7/1 can be provided analogous to the first circulation channel, which has openings 7/2 for receiving the paper pressure rollers 8.
  • a single paper pressure roller 8 approximately in the vicinity of the center of the platen roller 1, which has the advantage that there can be no warping of the paper when using very thin single paper, since this single paper pressure roller 8 has a certain guiding effect going out.
  • the pressure force of these paper pressure rollers 8 is designed so that no slip can occur between the single sheet B and the platen roller, so that the single sheet paper B of the automatic feed device can be pulled out safely.
  • the location of this Paper pressure rollers 8 are selected in the second inlet channel 7 so that the individual sheets B can be gripped as securely as possible.
  • the paper guide plate 7/1 is bent at its upper part, so that the single sheets B can easily be guided into the roller wedge formed by the paper guide plate 7/1 and the circumference of the paper platen roller 1.
  • the pressure rollers 8 are designed to be pivotable in the region of the second inlet channel, so that in operation with continuous paper the pressure rollers 6 alone are engaged in the first inlet channel.
  • FIGS. 2 and 3 The actual drive of the platen roller 1 and the tractor 4 with the associated change-over gear is shown in FIGS. 2 and 3. It consists of a central drive motor, shown only schematically here, with the associated drive pinion 10. With this drive pinion 10 in constant engagement there is a primary drive wheel 11 which is mounted within a pivotable rocker arm 12 and which thereby forms the pivot axis of the rocker arm 12. The swing arms of the rocker 12 in turn each carry a secondary drive wheel 13 and 14, these secondary drive wheels 13 and 14 in turn being in constant engagement with the primary drive wheel 11.
  • the rocker 12 itself is in turn articulated at the ends of its arms via spring elements 15 and 16 to housing elements 17 of the printer frame, not shown here.
  • the spring elements 15 and 16 are formed spirally and act on the holding elements 17 of the frame and on the arms of the rocker 12 that the rocker 12 is always in a stable in the illustrated pivot positions of Fig. 2 and Fig. 3 Position, wherein the pivoting of the rocker 12 from the position of FIG. 2 in the position of FIG. 3 or vice versa via a lever connected to the pivot axis of the rocker 12 for clarity is not shown here.
  • an electromagnetic or other switching device can also be arranged, which pivots the rocker 12 according to the desired operating mode, single sheet or continuous paper. This pivoting can be done automatically by the control of the printer.
  • the function of the changeover gear is as follows.
  • the pivoting position of the changeover gear shown in FIG. 2 corresponds to the continuous paper feed function.
  • the secondary wheel 13 engages via an intermediate wheel 18 in a drive wheel 19 of the tractor 4.
  • the drive wheel 19 is in turn connected to the knob tape 20 which engages in the edge perforation of the continuous paper.
  • the secondary wheel 14 is operatively connected to the platen roller 1 or to a drive wheel which is firmly connected to the platen roller.
  • the drive of both the tractor 4 and the platen roller 1 is based on the central drive pinion 10, the individual wheels of the transmission moving in accordance with the arrow direction shown.
  • the ratio of the individual wheels to one another is chosen such that it results in a peripheral speed of the platen roller that is slightly greater than the resulting feed speed of the tractor 4.
  • the wheels of the change-over gear can be both gear wheels and friction wheels. The only important thing is that there is no slippage between the individual wheels.
  • the translation of the three drive wheels 10, 11 and 13 in connection with the platen roller 1 is now selected so that the peripheral speed of the platen roller 1 again corresponds to the original feed speed of the paper, i.e. it is lower than in operation with continuous paper but corresponds to the paper feed speed of the paper tractor 20 and thus the paper feed speed to the control of the printhead is matched.
  • the paper roll 1 is thus operated precisely with the feed, the z. B. is required for graphic printing.

Claims (5)

1. Dispositif d'entraînement du papier pour des imprimantes, servant à entraîner alternativement des feuilles individuelles (B) et une bande de papier sans fin (A), notamment pour des machines à écrire ou des machines de bureau comportant un dispositif commun d'entrainement (10) pour un cylindre d'impression (1) et un tracteur de papier (4), l'entrainement du cylindre d'impression (1) et du tracteur de papier (4) s'effectuant en fonction du type de fonctionnement avec des feuilles individuelles ou une bande de papier sans fin, et la vitesse d'avance du cylindre d'impression (1) étant supérieure à celle du tracteur de papier (4), caractérisé par le fait qu'il est prévu un mécanisme de commutation (12), basculable en fonction du type de fonctionnement et comprenant une roue d'entraînement primaire (11 qui engrène en permanence avec le dispositif commun d'entraînement (10) et, à nouveau, engrène en permanence avec deux roues d'entraînement secondaires (13, 14) montée de façon à pouvoir basculer, ces roues d'entrainement secondaires (13, 14) étant dimensionnée de manière que, dans une première position basculée associée au type de fonctionnement utilisant une bande de papier sans fin, une roue d'entraînement secondaire (13) engrène avec le tracteur (4) et l'autre roue d'entrainement secondaire (14) engrène avec le cylindre d'impression (1), et, dans une seconde position basculée associée au type de fonctionnement avec des feuilles individuelles, seule une roue d'entraînement secondaire (13) engrène avec le cylindre d'impression (1).
2. Dispositif d'entraînement du papier suivant la revendication 1, caractérisé par le fait que les roues d'entrainement secondaires (13, 14) sont montées sur un bras oscillant (12) pouvant pivoter autour de la roue d'entraînement primaire (11).
3. Dispositif d'entraînement du papier suivant la revendication 1 ou 2, caractérisé par le fait que dans la zone de basculement d'une roue d'entraînement secondaire (13) il est prévu une roue intermédiaire (18) associée au tracteur de papier (4).
4. Dispositif d'entraînement du papier suivant la revendication 2, caractérisé par le fait qu'au bras oscillant (12) sont associés des éléments d'encliquetage en forme de ressorts (15, 16) qui, en raison de leur tension, maintiennent de façon stable le bras oscillant (12) soit dans la première position basculée, soit dans la seconde position basculée, en fonction du sens de basculement.
5. Dispositif d'entraînement suivant l'une des revendications 1 à 4, caractérisé par le fait qu'un seul galet (5, 8) de serrage du papier est disposé respectivement dans le canal d'introduction des feuilles de papier (7) ou dans le canal d'introduction (3) pour la bande de papier sans fin.
EP84104582A 1983-04-26 1984-04-24 Alimentation en feuilles et en bandes pour imprimantes Expired - Lifetime EP0123310B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3315037 1983-04-26
DE3315037 1983-04-26
DE3343196 1983-11-29
DE3343196 1983-11-29

Publications (3)

Publication Number Publication Date
EP0123310A2 EP0123310A2 (fr) 1984-10-31
EP0123310A3 EP0123310A3 (en) 1988-01-13
EP0123310B1 true EP0123310B1 (fr) 1990-02-07

Family

ID=25810313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84104582A Expired - Lifetime EP0123310B1 (fr) 1983-04-26 1984-04-24 Alimentation en feuilles et en bandes pour imprimantes

Country Status (3)

Country Link
EP (1) EP0123310B1 (fr)
JP (1) JPS59207271A (fr)
DE (1) DE3481294D1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE447224B (sv) * 1985-03-20 1986-11-03 Ericsson Telefon Ab L M Pappersmatningsanordning for en skrivare
DE3607079A1 (de) * 1986-03-04 1987-10-15 Mannesmann Ag Papiertransporteinrichtung fuer einzelblaetter und endlospapierbahnen in druckern, insbesondere in matrixdruckern
JP2757355B2 (ja) * 1986-06-27 1998-05-25 セイコーエプソン株式会社 紙送り機構
JPS6353070A (ja) * 1986-08-25 1988-03-07 Hitachi Ltd 感熱転写記録装置
JPH0761725B2 (ja) * 1986-08-29 1995-07-05 エイ・ティ・アンド・ティ グローバル インフォメーション ソルーションズ インターナショナル インコーポレイテッド プリンタ
DE68908760T2 (de) * 1988-04-28 1994-03-24 Tokyo Electric Co Ltd Blattfördergerät für Druckvorrichtungen.
JPH0323966A (ja) * 1989-06-21 1991-01-31 Brother Ind Ltd 紙送り装置
WO1991013764A1 (fr) * 1990-03-16 1991-09-19 Mannesmann Ag Dispositif servant a transporter des porteurs d'enregistrements sous forme de bande dans des imprimantes
DE19709941A1 (de) * 1997-03-11 1998-09-17 Siemens Nixdorf Inf Syst Drucker zum Bedrucken von Einzelblättern und Endlospapierbahnen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB558840A (en) * 1942-09-28 1944-01-24 Fanfold Ltd Improvements in stationery feed mechanism for typewriting and like machines
US3753483A (en) * 1970-03-20 1973-08-21 Memorex Corp Typewriter dual feed apparatus
US4088256A (en) * 1973-09-18 1978-05-09 U.S. Philips Corporation Device for printing data
US4360279A (en) 1980-07-02 1982-11-23 Brother Kogyo Kabushiki Kaisha Printing paper feeding mechanism
WO1982003823A1 (fr) 1981-05-06 1982-11-11 Data Corp Florida Imprimante a haute vitesse pourvue de chemins de papier multiples
DE3149667C2 (de) 1981-12-15 1984-10-18 Siemens AG, 1000 Berlin und 8000 München Aufsetzbare Transporteinrichtung für randgelochtes Endlospapier

Also Published As

Publication number Publication date
DE3481294D1 (de) 1990-03-15
EP0123310A2 (fr) 1984-10-31
EP0123310A3 (en) 1988-01-13
JPS59207271A (ja) 1984-11-24

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