EP0038415B1 - Device for a gradual conveyance of recording conveyers to an electro-mechanic writing system - Google Patents

Device for a gradual conveyance of recording conveyers to an electro-mechanic writing system Download PDF

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Publication number
EP0038415B1
EP0038415B1 EP81101617A EP81101617A EP0038415B1 EP 0038415 B1 EP0038415 B1 EP 0038415B1 EP 81101617 A EP81101617 A EP 81101617A EP 81101617 A EP81101617 A EP 81101617A EP 0038415 B1 EP0038415 B1 EP 0038415B1
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EP
European Patent Office
Prior art keywords
sheet
drive
feeder
printing
conveyor
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
Application number
EP81101617A
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German (de)
French (fr)
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EP0038415A1 (en
Inventor
Günter Baitz
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.)
Wincor Nixdorf International GmbH
Original Assignee
Wincor Nixdorf International GmbH
Nixdorf Computer AG
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Application filed by Wincor Nixdorf International GmbH, Nixdorf Computer AG filed Critical Wincor Nixdorf International GmbH
Priority to AT81101617T priority Critical patent/ATE5641T1/en
Publication of EP0038415A1 publication Critical patent/EP0038415A1/en
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Publication of EP0038415B1 publication Critical patent/EP0038415B1/en
Expired legal-status Critical Current

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    • 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
    • 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

Definitions

  • the invention relates to a device for the step-by-step feeding of recording media to an electromagnetic writing mechanism, in which the respective recording media is moved past a writing line with a stepping drive and a pull-off device, in which a single sheet conveyor is provided for feeding sheet-shaped recording media to the writing line.
  • Such an additional device is, for example, the aforementioned single sheet conveyor, which can be placed on the writing mechanism and contains one or more compartments for sheet-like recording media. Separation mechanisms in the form of friction rollers are assigned to the subjects, which can be actuated by means of suitable control signals transmitted by the writing mechanism by means of electromagnetic clutches and pull single sheets from the respective subject and feed them to the writing line. After the information has been recorded in the writing mechanism, the respective single sheet can then be removed from the writing line and stored in a storage compartment.
  • the single sheet conveyor to be placed on electromagnetic writing mechanisms as an additional device is provided with a drive assigned to it and a control device for controlling the drive, and is used by the electro-mechanical writing mechanism, e.g. B. controlled by request signals.
  • Another additional device to be placed on an electromechanical writing mechanism is the endless form conveyor, with which tape-shaped record carriers can be drawn through a writing mechanism, which have perforations on their longitudinal edges, into which the barbed belts of two conveyor units engage, which are also referred to as fanfold conveyors.
  • These continuous form conveyors have so far only been used in the direction of transport of the record carrier behind the writing line when they are used on electromechanical writing mechanisms, because they pull the tape-shaped record carrier through the writing mechanism so that when they exit the continuous form conveyor, they are stored in a storage compartment with zigzag folding can.
  • an endless form conveyor with transport direction can be attached to the single sheet feeder in the same direction as the single sheet feeder, the drive of which is coupled to the drive of the single sheet feeder, and that the take-off device contains transport elements, the scope of which in the sense of a current one predetermined voltage of the respective record carrier is dimensioned or obtained.
  • the invention provides a new type of use of a continuous form conveyor, because on the one hand it is not exchanged for the single sheet conveyor during operation of the continuous form, but is attached to it, on the other hand it is not used to pull the continuous form through the writing mechanism, but rather works in the same direction as the single sheet feed, which means that he does not pull the continuous form in the state attached to the single sheet conveyor, but pushes it. This is possible because the deduction device arranged downstream of the writing line for operation with single sheets, which can also pull off the continuous form.
  • the continuous form is gradually fed with the endless form conveyor in accordance with the line-by-line recording in the typewriter, then all that is required on the endless form conveyor is a driving force that is suitable for feeding the continuous form from a supply point.
  • a driving force that is suitable for feeding the continuous form from a supply point.
  • the transport elements of the take-off device which works step-by-step synchronously with the conveying movement of the endless form conveyor, pull the endless form off the writing line, no additional force is required to loosen the continuous form in order to avoid friction occurring at deflection points to compensate rivers.
  • the new type of use of the endless form conveyor therefore requires considerably less effort for its drive. This makes it possible to couple the drive of the continuous form conveyor to the single sheet conveyor when it is attached.
  • the principle according to the invention which does not provide for the replacement of one conveyor for the other, but uses the single sheet conveyor as a permanently installed additional device to which the endless form conveyor can be attached, leads to a particularly advantageous development in that the drive of the single sheet conveyor with the stepper drive of the writing mechanism can be coupled.
  • This makes special drive devices in the area of the single sheet conveyor superfluous, and only electromagnetic clutches can be provided with which the operation of the separating devices for the single sheet feed is controlled. It has been found out that control signals for the actuation c nng such electromagnetic clutches not summarize'rntt.
  • a particularly simple drive control of the single sheet conveyor, possibly in conjunction with the endless form conveyor, is possible in that the single sheet conveyor has a toothed belt drive, the belt of which is guided via a toothed wheel provided at the coupling point with the endless form conveyor and via a gearwheel provided at the coupling point engages on the endless form conveyor or in a drive gear provided on the writing mechanism.
  • an electromechanical writing mechanism 10 is schematically shown in a side view, which contains a writing head which is displaceably mounted in its interior, for example a needle printing head, which records information line by line on a recording medium not recognizable in FIG
  • the platen roller 12 shown in dashed lines is guided around and can be manually adjusted on the outside of the writing unit 10 with a handwheel 13.
  • An electromechanical stepper drive is used to drive the platen roller, and the platen roller 12 is assigned 10 pressure rollers 14 inside the writing mechanism, which act on the record carrier passed between them and the platen roller 12, so that it is transported line by line during the stepping movement of the platen roller 12, such as this is also known for normal typewriters.
  • a single sheet conveyor 15 is arranged as an additional device, which is pivotally connected to the writing mechanism 10 at 16, so that it can be pivoted away from the writing mechanism 10 in a manner yet to be described.
  • the single sheet conveyor 15 contains in Fig. 1 dashed compartments 17 and 18, in which sheet-shaped recording medium z. B. different formats can be stored, which are then removed in a manner to be described from the compartments 17 and 18 and fed to the platen roller 12.
  • 15 separating devices can be provided in the interior of the single sheet conveyor, which can optionally be actuated with electromagnetic clutches 19 and 20 provided on the outside of the single sheet conveyor 15.
  • the electromagnetic clutches 19 and 20 belong to a drive system which, as an essential component, has a toothed belt 21 which is shown schematically in FIG.
  • the gear 29, which can belong to the single sheet conveyor 15, is a coupling gear and is decoupled from the drive gear seated on the platen axis when the single sheet conveyor 15 is pivoted away.
  • the endless form conveyor 30 contains at least two spiked belt drives, which is indicated in FIG. 1 by the dashed line 31. Further, 28 coupled further gear wheels 32 and 33 are provided with the drive gear, the h for a suitable transport direction and Transportgesr windiness ensure the continuous form feeder 30th
  • the drive gear 28 of the endless form conveyor 30 is arranged so that it engages in the toothed roller 26 of the toothed belt 21 when the endless form conveyor 30 is attached to the single sheet conveyor 15. If the endless form conveyor 30 is removed, the drive gear 28 is uncoupled from the toothed roller 26 of the toothed belt 21.
  • Fig. 1 makes it particularly clear that the drive of the two additional devices, i.e. the single sheet conveyor 15 and the endless form conveyor 30, takes place from the step drive of the electromechanical writing mechanism 10, so that there is no separate drive for the single sheet conveyor 15 and the endless form conveyor 30 and no separate logic control circuit is required.
  • the electrical control signals required to actuate the electromagnetic clutches 19 and 20 can be derived from a logic control circuit which is already part of the electromechanical writing mechanism 10.
  • FIG. 2 shows a schematic sectional illustration of the overall device according to FIG. 1.
  • This illustration illustrates the principle of the internal structure of the three devices 10; 15 and 30 in association with each other.
  • This principle corresponds to the design customary in office machine technology with two side plates between which the various movable elements are mounted.
  • a board 40 of the single sheet conveyor can thus be seen, which is pivotally connected to the writing mechanism 10 at 16 and has two bolts 41 and 42, into which a board 50 of the endless form conveyor 31 is suspended with an arm 51 , which is provided with suitable recesses 52 and 53.
  • a corresponding structure is also provided for the other side of the overall device, which is not shown in the sectional view according to FIG. 2 and of which the outside is shown in FIG. 1.
  • a logic control circuit 80 in connection with an electric drive motor 81 and a main drive gear 82 are provided in the electromechanical writing mechanism 10.
  • the main drive gear 82 rotates the platen roller 12 step by step via a further gear, not shown in FIG., On the platen axis, for which purpose the drive motor 81 is operated step by step by the logic control circuit 80.
  • the sheet compartments 17 and 18 contain sheet-shaped recording media 55 which, when the separating devices 56 and 57 are actuated, are fed to the platen roller 12 via a guide plate 58 and 59 with the electromagnetic clutches 19 and 20 shown in FIG. 1.
  • they arrive according to known office machine technology between the platen roller 12 and the pinch rollers 14 and are guided around the platen roller 12 in a manner not shown. They are then picked up by a take-off device which consists of lower transport and pressure rollers 60 and 61 and upper transport and pressure rollers 62 and 63.
  • the transport rollers 60 and 61 sit on an axis which is rotated by the toothed roller 23 and 25 shown in FIG. 1 over the toothed belt 21.
  • the removal device causes the recording media to be pulled off the platen and placed in a storage compartment 64 when the sheet-shaped recording media emerge from the nip of the transport and pressure rollers 62 and 63.
  • FIG. 2 only gives a hint of the above-described guidance of sheet-shaped recording media, reference being made to the arrows provided in the separating devices 56 and 57.
  • the transport path of an endless form 65 is clearly shown, which is fed to the endless form conveyor 30 at 54 and taken up by its transport devices 31.
  • the continuous form then runs through a gap which is formed by the bottom of the receiving compartment 64 and a guide plate 66.
  • This guide plate is curved on its front edge so that the continuous form 65 is guided downwards.
  • a further guide plate 67 can optionally be provided.
  • the continuous form then arrives at the writing line, for which purpose it is guided around the platen roller 12 in a manner known per se and is fed in a manner not shown to the take-off device with the transport and pressure rollers 60 and 61 or 62 and 63.
  • the continuous form is not passed into the sheet compartment 64 when it emerges from the gap between the rollers 62 and 63, but is fed via a guide surface 68 to an exit point 69, where it can be stored in a known manner, for example in a zigzag fold.
  • the guide surface 68 can be designed, for example, in the form of a lattice and upon removal of the continuous form conveyor 30 can also be removed from the single sheet conveyor 15, for which purpose they are e.g. B. can be arranged in sliding guides (not shown), which are provided on the boards 40 of the single sheet conveyor 15.
  • the pressure rollers 61 and 63 can be released from their position shown in FIG. 2, as indicated by the arrows next to them. This can be advantageous when pulling in an endless form 65, in order to eliminate any directional errors that may occur, since the continuous form is to be guided at 69 at the exit point 54 exactly at the exit at 69.
  • the alignment in the sense of such a parallel guidance takes place automatically when the pressure rollers 61 and 63 are released and the transport movement is carried out.
  • the pressure rollers 14 on the platen roller 12 can be released from the platen roller 12 in continuous form operation, which is also shown in FIG. 2 by an arrow.
  • the solution of the pressure rollers 14 from the platen roller 12 is expedient because the continuous form 65 is only by the take-off device with the rollers 60; 61; 62 and 63 is pulled and pushed through the endless form conveyor 30.
  • this conveying principle requires only a very small transport force for the endless form 65, because the tension of the endless form 65 is not so great that increased frictional losses would occur due to its repeated deflection.
  • the diameters of the transport rollers 60 and 62 of the take-off device are selected such that there is no sagging of the endless form 65 when it is being fed through the endless form conveyor 30.
  • the surface of the transport rollers 60 and 62 can also be coated with a material which allows a certain slip between the transport rollers 60 and 62 and the continuous form 65 as soon as a limit value of the tensile stress of the continuous form 65 is exceeded.
  • a photoelectric unit 90 is indicated schematically.
  • This can be, for example, an arrangement of a light transmitter and a light receiver, which emits an electrical signal when the reflectance of the surface opposite it changes, i. i.e. when the dark platen surface is covered by a recording medium. is covered and the edge of which passes the photoelectric unit 90.
  • the signal it emits can then advantageously be used to control the logic control circuit 80 of the writing mechanism 10 in the sense of starting the printing process.
  • the signal which indicates the arrival of a single sheet on the writing line and thus the safe assumption of transport by the stepping drive of the writing mechanism 10, controls the switching off of the electromagnetic clutch 19 via the logic arrangement 80; 20 of the respective separating device 56; 57.
  • the derivation of control criteria immediately before the writing line eliminates errors and inaccuracies in sheet transport which were previously unavoidable when compiling writing mechanisms and single sheet conveyors.
  • Fig. 3 shows a reduced view of an operating position of the device with an assumed endless belt conveyor 30.
  • the single sheet conveyor 15 is pivoted at 16 from the writing mechanism 10 so that the platen roller 12 is accessible from above to a sheet-like recording medium, as in a normal typewriter to move in manually. This is indicated by the dash-dotted line 95.
  • FIG. 3 also shows a claw device 92 which can be actuated by a hand lever 93 provided on the other side of the single sheet conveyor 15 in order to decouple it from the axis of the platen roller 12.
  • a claw device 92 with hand lever 93 can be provided on both sides of the single sheet conveyor 15 and is expediently provided with a biasing spring 94 which tensions the claw device 92 so that it is always held on the axis of the platen roller 12.
  • the take-off device can advantageously also be designed with endless conveyor belts instead of rollers 60 to 63, the conveyor belts each being guided in pairs adjacent to one another and between the respective recording media ger record.
  • the dimensioning of such transport elements is to be carried out analogously to the above statements about the diameter of the transport rollers 60 and 62, with the deflection rollers provided for the endless conveyor belts being dimensioned accordingly.
  • a construction according to the invention can be used in connection with any type of writing mechanism.
  • a platen roller is immaterial for the operation of the device described.
  • typewriters can also be equipped with the device according to the invention which, instead of a platen, contain a fixed writing ruler as a counterpart for a needle printhead, for example.

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  • Handling Of Cut Paper (AREA)
  • Handling Of Sheets (AREA)
  • Ink Jet (AREA)

Abstract

Sheet feeding accessories for a typewriter-type printer unit having a stepwise driven print roller. The single sheet feeder is pivotally mounted on the printing unit and the continuous sheet feeder is mounted piggyback style on the single sheet feeder. A drive belt commonly connects the print roller, the single sheet feeder, and the continuous sheet feeder. take-off (60,61) is provided down stream in the direction of printing media movement. Both a single sheet conveyor (15) and a continuous form conveyor (30) attached to conveyor 15 are driven by a drive belt 21 commonly interconnecting the drive roller (12), the drive take-off (60,61) with the sheet and forms conveyor to achieve synchronous operation in the same feed direction. The drive take-off (60,61) has rollers of such a circumference in engagement with the printing media so as to maintain tension on the printing media when fed therethrough.

Description

Die Erfindung betrifft eine Einrichtung zur schrittweisen Zuführung von Aufzeichnungsträgern an ein elektromagnetisches Schreibwerk, in dem der jeweilige Aufzeichnungsträger mit einem Schrittantrieb und einer Abzugsvorrichtung an einer Schreibzeile vorbeibewegt wird, bei der ein Einzelblattförderer zur Zuführung blattförmiger Aufzeichnungsträger zur Schreibzeile vorgesehen ist.The invention relates to a device for the step-by-step feeding of recording media to an electromagnetic writing mechanism, in which the respective recording media is moved past a writing line with a stepping drive and a pull-off device, in which a single sheet conveyor is provided for feeding sheet-shaped recording media to the writing line.

Es ist bereits bekannt, elektromechanische Schreibwerke mit Zusatzgeräten zu versehen, die eine automatische Zu- und Abführung von Aufzeichnungsträgern ermöglichen. Ein solches Zusatzgerät ist beispielsweise der vorstehend genannte Einzalblattförderer, der auf das Schreibwerk aufgesetzt werden kann und ein oder mehrere Fächer für blattförmige Aufzeichnungsträger enthält. Den Fächern sind Vereinzelungsmechanismen in Form von Reibrollen zugeordnet, die durch geeignete, vom Schreibwerk übermittelte Steuersignale mittels Elektromagnetkupplungen betätigt werden können und Einzelblätter aus dem jeweiligen Fach abziehen und der Schreibzeile zuführen. Anschließend kann das jeweilige Einzelblatt nach der Informationsaufzeichnung im Schreibwerk von der Schreibzeile wieder abgeführt und in einem Ablagefach abgelegt werden.It is already known to provide electromechanical writing mechanisms with additional devices which enable automatic recording and retrieval of recording media. Such an additional device is, for example, the aforementioned single sheet conveyor, which can be placed on the writing mechanism and contains one or more compartments for sheet-like recording media. Separation mechanisms in the form of friction rollers are assigned to the subjects, which can be actuated by means of suitable control signals transmitted by the writing mechanism by means of electromagnetic clutches and pull single sheets from the respective subject and feed them to the writing line. After the information has been recorded in the writing mechanism, the respective single sheet can then be removed from the writing line and stored in a storage compartment.

Der als Zusatzgerät auf elektromagnetische Schreibwerke aufzusetzende Einzelblattförderer ist mit einem ihm eigens zugeordneten Antrieb und einer Steuereinrichtung zur Steuerung des Antriebs versehen und wird vom elektro-mechanischen Schreibwerk her, z. B. durch Anforderungssignale, gesteuert. Dadurch ergibt sich ein relativ hoher mechanischer und auch elektrischer Aufwand für den Einzelblattförderer, durch den sich sein weitläufiger Einsatz noch nicht vollständig verwirklichen ließ.The single sheet conveyor to be placed on electromagnetic writing mechanisms as an additional device is provided with a drive assigned to it and a control device for controlling the drive, and is used by the electro-mechanical writing mechanism, e.g. B. controlled by request signals. This results in a relatively high mechanical and electrical effort for the single sheet conveyor, which has not yet been able to fully implement its widespread use.

Ein weiteres auf ein elektromechanisches Schreibwerk aufzusetzendes Zusatzgerät ist der Endlosformularförderer, mit dem bandförmige Aufzeichnungsträger durch ein Schreibwerk gezogen werden können, die an ihren Längskanten eine Perforation haben, in die die Stachelbänder zweier Fördereinheiten eingreifen, die auch als Leporelloförderer bezeichnet werden. Diese Endlosformularförderer wurden bisher bei ihrem Einsatz an elektromechanischen Schreibwerken ausschließlich in Transportrichtung des Aufzeichnungsträgers hinter der Schreibzeile eingesetzt, denn sie ziehen den bandförmigen Aufzeichnungsträger durch das Schreibwerk hindurch, so daß er beim Austritt aus dem Endlosformularförderer in einem Ablagefach unter Zick-Zack-Faltung abgelegt werden kann.Another additional device to be placed on an electromechanical writing mechanism is the endless form conveyor, with which tape-shaped record carriers can be drawn through a writing mechanism, which have perforations on their longitudinal edges, into which the barbed belts of two conveyor units engage, which are also referred to as fanfold conveyors. These continuous form conveyors have so far only been used in the direction of transport of the record carrier behind the writing line when they are used on electromechanical writing mechanisms, because they pull the tape-shaped record carrier through the writing mechanism so that when they exit the continuous form conveyor, they are stored in a storage compartment with zigzag folding can.

Für den Antrieb des Endlosformularförderers war bisher eine relativ große Leistung erforderlich, denn durch das Förderprinzip des Hindurchziehens eines Aufzeichnungsträgers durch ein Schreibwerk muß der Endlosformularförderer außer der für das bloße Befördern des Aufzeichnungsträgers erforderlichen Kraft zusätzlich auch die Zugkraft aufwenden, die nötig ist, um die durch wiederholte Umlenkung des Aufzeichnungsträgers im Schreibwerk verursachten Reibungseinflüsse zu kompensieren. Ein Nachteil, der dabei besonders ins Gewicht fällt, bestand bisher in der erhöhten Gefahr eines Ausreißens der Perforationen des Aufzeichnungsträgers durch die relativ hohe, an seinen Kanten einwirkende Zugkraft.Up to now, a relatively large output was required to drive the endless form conveyor, because the principle of conveyance of pulling a record carrier through a writing mechanism means that the endless form conveyor also has to exert the tractive force required to merely convey the record carrier in addition to the mere conveyance of the record carrier repeated deflection of the record carrier in the writing mechanism to compensate for the effects of friction. A disadvantage, which is particularly significant, has hitherto been the increased risk of the perforations of the recording medium tearing out due to the relatively high tensile force acting on its edges.

Es ist Aufgabe der Erfindung, eine Einrichtung anzugeben, die einen wahlweisen Einsatz von Einzelblättern und von Endlosformularen als Aufzeichnungsträger in elektrischen Schreibwerken auf problemlose Weise gestattet und bei einem Wechsel von einer Aufzeichnungsträgerart zur anderen keine Änderung der Antriebsleistung erfordert.It is an object of the invention to provide a device which permits the optional use of single sheets and of continuous forms as recording media in electrical writing mechanisms in a problem-free manner and does not require any change in the drive power when changing from one type of recording media to another.

Diese Aufgabe wird für eine Einrichtung eingangs genannter Art erfindungsgemäß dadurch gelöst, daß an den Einzelblattförderer ein Endlosformularförderer mit Transportrichtung gleichsinnig zur Einzelblattzuführung ansetzbar ist, dessen Antrieb mit dem Antrieb des Einzelblattförderers gekoppelt ist, und daß die Abzugsvorrichtung Transportelemente enthält, deren Umfang im Sinne einer laufenden vorgegebenen Spannung des jeweiligen Aufzeichnungsträgers bemessen bzw. beschaffen ist.This object is achieved according to the invention for a device of the type mentioned above in that an endless form conveyor with transport direction can be attached to the single sheet feeder in the same direction as the single sheet feeder, the drive of which is coupled to the drive of the single sheet feeder, and that the take-off device contains transport elements, the scope of which in the sense of a current one predetermined voltage of the respective record carrier is dimensioned or obtained.

Die Erfindung sieht eine neuartige Einsatzart eines Endlosformularförderers vor, denn einerseits wird er beim Endlosformularbetrieb nicht gegen den Einzelblattförderer ausgewechselt, sondern an ihn angesetzt, andererseits dient er nicht zum Hindurchziehen des Endlosformulars durch das Schreibwerk, sondern er arbeitet gleichsinnig zur Einzelblattzuführung, was bedeutet, daß er im an den Einzelblattförderer angesetzten Zustand das Endlosformular nicht zieht, sondern schiebt. Dies ist möglich, weil die für den Betrieb mit Einzelblättern der Schreibzeile nachgeordnete Abzugsvorrichtung vorgesehen ist, die auch das Endlosformular abziehen kann. Wenn nun im Falle des Endlosformularbetriebs ein entsprechend der zeilenweisen Aufzeichnung im Schreibwerk schrittweiser Vorschub des Endlosformulars mit dem Endlosformularförderer erfolgt, so ist am Endlosformularförderer lediglich eine Antriebskraft erforderlich, die zur Zuführung des Endlosformulars von einer Vorratsstelle aus geeignet ist. Theoretisch ergibt sich in den Zu- und Abführungen des Endtosformulars vor und hinter der Schreibzeile des Schreibwerks eine Lockerung in der Führung des Endlosformulars. Wenn nun die Transportelemente der Abzugsvorrichtung, die schrittweise synchron mit der Förderbewegung des Endlosformularförderers arbeitet, das Endlosformular von der Schreibzeile abziehen, so ist hierzu infolge der Lockerung des Endlosformulars jedenfalls keine zusätzliche Kraft erforderlich, um an Umlenkstellen auftretende Reibungseinflüsse zu kompensieren. Es genügt an dieser Stelle lediglich die Kraft, die zur laufenden vorgegebenen Spannung des Endlosformulars nötig ist. Diese laufende Spannung kann leicht dadurch verwirklicht werden, daß die Transportelemente der Abzugsvorrichtung, die beispielsweise Transportrollen sein können, einen solchen Durchmesser ggf. in Verbindung mit einer geeigneten Oberfläche haben, daß sich die erforderliche gerade Führung des Endlosformulars ohne Durchhängen und damit verbundene Transportstörungen ergibt.The invention provides a new type of use of a continuous form conveyor, because on the one hand it is not exchanged for the single sheet conveyor during operation of the continuous form, but is attached to it, on the other hand it is not used to pull the continuous form through the writing mechanism, but rather works in the same direction as the single sheet feed, which means that he does not pull the continuous form in the state attached to the single sheet conveyor, but pushes it. This is possible because the deduction device arranged downstream of the writing line for operation with single sheets, which can also pull off the continuous form. If, in the case of continuous form operation, the continuous form is gradually fed with the endless form conveyor in accordance with the line-by-line recording in the typewriter, then all that is required on the endless form conveyor is a driving force that is suitable for feeding the continuous form from a supply point. Theoretically, there is a loosening of the entry and exit of the end form before and after the writing line of the writing mechanism in the management of the endless form. If the transport elements of the take-off device, which works step-by-step synchronously with the conveying movement of the endless form conveyor, pull the endless form off the writing line, no additional force is required to loosen the continuous form in order to avoid friction occurring at deflection points to compensate rivers. At this point, all that is required is the force that is necessary for the current tension of the continuous form. This running tension can easily be realized in that the transport elements of the take-off device, which can be transport rollers, for example, have such a diameter, possibly in conjunction with a suitable surface, that the required straight guidance of the continuous form results without sagging and associated transport disturbances.

Die neuartige Einsatzart des Endlosformularförderers benötigt also einen wesentlich geringeren Kraftaufwand für seinen Antrieb. Dadurch ist es möglich, den Antrieb des Endlosformularförderers beim Ansetzen an den Einzelblattförderer mit dessen Antrieb zu koppeln.The new type of use of the endless form conveyor therefore requires considerably less effort for its drive. This makes it possible to couple the drive of the continuous form conveyor to the single sheet conveyor when it is attached.

Das erfindungsgemäße Prinzip, das kein Auswechseln des einen Förderers gegen den anderen vorsieht, sondern den Einzelblattförderer als bleibend installiertes Zusatzgerät benutzt, an das der Endlosformularförderer ggf. angesetzt werden kann, führt zu einer besonders vorteilhaften Weiterbildung insofern, als der Antrieb des Einzelblattförderers mit dem Schrittantrieb des Schreibwerks gekoppelt sein kann. Dadurch werden besondere Antriebsvorrichtungen im Bereich des Einzelblattförderers überflüssig, und es können lediglich Elektromagnetkupplungen vorgesehen sein, mit denen der Betrieb der Vereinzelungsvorrichtungen für die Einzelblattzuführung gesteuert wird. Es hat sich dabei gezeigt, daß Steuersignale für die Betäti- cnng solcher Elektromagnetkupplungen nicht unbedingt'rntt. einer besonderen, dem Einzelblattförder>iugeordneten Steuerlogik erzeugt werden müssen, sondern sehr einfach mit der im elektromechanischen Schreibwerk bereits vorhandenen logischen Steuerschaltung abgeleitet werden können, wozu diese mit einem vergleichsweise geringen zusätzlichen Aufwand zu erweitern ist, der besonders gering gegenüber dem Aufwand ist, der durch eine separate Antriebsvorrichtung mit ihr eigens zugeordneter elektronischer Steuerung verursacht wird.The principle according to the invention, which does not provide for the replacement of one conveyor for the other, but uses the single sheet conveyor as a permanently installed additional device to which the endless form conveyor can be attached, leads to a particularly advantageous development in that the drive of the single sheet conveyor with the stepper drive of the writing mechanism can be coupled. This makes special drive devices in the area of the single sheet conveyor superfluous, and only electromagnetic clutches can be provided with which the operation of the separating devices for the single sheet feed is controlled. It has been found out that control signals for the actuation c nng such electromagnetic clutches not unbedingt'rntt. a special control logic associated with the single sheet conveyor must be generated, but can be derived very easily with the logic control circuit already present in the electromechanical writing mechanism, for which purpose it can be expanded with a comparatively small additional effort, which is particularly low compared to the effort caused by a separate drive device is caused with its dedicated electronic control.

Eine besonders einfache Antriebssteuerung des Einzelblattförderers ggf. in Verbindung mit dem Endlosformularförderer ist dadurch möglich, daß der Einzelblattförderer einen Zahnriementrieb aufweist, dessen Riemen über ein an der Kopplungsstelle mit dem Endlosformularförderer und über ein an der Kopplungsstelle mit dem Schreibwerk vorgesehenes Zahnrad geführt ist, welches in ein am Endlosformularförderer bzw. in ein am Schreibwerk vorgesehenes Antriebszahnrad eingreift.A particularly simple drive control of the single sheet conveyor, possibly in conjunction with the endless form conveyor, is possible in that the single sheet conveyor has a toothed belt drive, the belt of which is guided via a toothed wheel provided at the coupling point with the endless form conveyor and via a gearwheel provided at the coupling point engages on the endless form conveyor or in a drive gear provided on the writing mechanism.

Weitere Ausgestaltungen der Erfindung sowie die Funktion eines Ausführungsbeispiels werden im folgenden anhand der Figuren beschrieben. Es zeigt

  • Fig. 1 die schematische Seitenansicht eines elektromechanischen Schreibwerks mit Einzelblattförderer und an diesen angesetztem Endlosformularförderer,
  • Fig. 2 eine schematische Schnittdarstellung der in Fig. 1 gezeigten Einrichtung und
  • Fig. 3 eine verkleinerte Seitenansicht der Einrichtung in einer Betriebsstellung, die das manuelle Einziehen von Aufzeichnungsträgern gestattet.
Further refinements of the invention and the function of an exemplary embodiment are described below with reference to the figures. It shows
  • 1 is a schematic side view of an electromechanical writing mechanism with single sheet conveyor and endless form conveyor attached to it,
  • Fig. 2 is a schematic sectional view of the device shown in Fig. 1 and
  • Fig. 3 is a reduced side view of the device in an operating position, which allows the manual insertion of recording media.

In Fig. 1 ist in einer Seitenansicht schematisch ein elektromechanisches Schreibwerk 10 dargestellt, das einen in seinem Inneren verschieblich gelagerten Schreibkopf, beispielsweise einen Nadeldruckkopf, enthält, welcher Informationen zeilenweise auf einen in Fig. 1 nicht erkennbaren Aufzeichnungsträger aufzeichnet, der hierzu um eine in Fig. gestrichelt dargestellte Schreibwalze 12 herumgeführt wird, die an der Außenseite des Schreibwerks 10 mit einem Handrad 13 manuell verstellt werden kann.In Fig. 1, an electromechanical writing mechanism 10 is schematically shown in a side view, which contains a writing head which is displaceably mounted in its interior, for example a needle printing head, which records information line by line on a recording medium not recognizable in FIG The platen roller 12 shown in dashed lines is guided around and can be manually adjusted on the outside of the writing unit 10 with a handwheel 13.

Zum Antrieb der Schreibwalze dient ein elektromechanischer Schrittantrieb, und der Schreibwalze 12 sind im Inneren des Schreibwerks 10 Andruckrollen 14 zugeordnet, die auf den zwischen ihnen und der Schreibwalze 12 hindurchgeführten Aufzeichnungsträger einwirken, so daß er während der Schrittbewegung der Schreibwalze 12 zeilenweise transportiert wird, wie dies auch für normale Schreibmaschinen bekannt ist.An electromechanical stepper drive is used to drive the platen roller, and the platen roller 12 is assigned 10 pressure rollers 14 inside the writing mechanism, which act on the record carrier passed between them and the platen roller 12, so that it is transported line by line during the stepping movement of the platen roller 12, such as this is also known for normal typewriters.

Auf dem elektromechanischen Schreibwerk 10 ist als Zusatzgerät ein Einzelblattförderer 15 angeordnet, der mit dem Schreibwerk 10 bei 16 schwenkbar verbunden ist, so daß er in noch zu beschreibender Weise von dem Schreibwerk 10 abgeschwenkt werden kann.On the electromechanical writing mechanism 10, a single sheet conveyor 15 is arranged as an additional device, which is pivotally connected to the writing mechanism 10 at 16, so that it can be pivoted away from the writing mechanism 10 in a manner yet to be described.

Der Einzelblattförderer 15 enthält in Fig. 1 gestrichelt dargestellte Vorratsfächer 17 und 18, in denen blattförmige Aufzeichnungsträger z. B. unterschiedlichen Formats gelagert sein können, die dann in noch zu beschreibender Weise aus den Fächern 17 und 18 abgeführt und der Schreibwalze 12 zugeführt werden. Zum Abführen der Blatter aus den Fächern 17 und 18 können im Inneren des Einzelblattförderers 15 Vereinzelungsvorrichtungen vorgesehen sein, die wahlweise mit an der Außenseite des Einzelblattförderers 15 vorgesehenen Elektromagnetkupplungen 19 und 20 betätigt werden können. Die Elektromagnetkupplungen 19 und 20 gehören zu einem Antriebssystem, welches als wesentlichen Bestandteil einen in Fig. 1 schematisch mit seinem Verlauf dargestellten Zahnriemen 21 aufweist, der mittels gezahnter Rollen 22; 23; 24; 25; 26; 27 geführt ist und in der in Fig. 1 gezeigten Pfeilrichtung transportiert wird, wenn die gezahnte Rolle 22. zusätzlich in ein Zahnrad 29 eingreift, welches seinerseits mit einem Zahnrad gekoppelt ist, welches auf der Achse der Schreibwalze 12 sitzt. Auf diese Weise wird bei schrittweisem Weiterschalten der Schreibwalze 12 auch der Zahnriemen 21 schrittweise weitergeschaltet, so daß er bei Einkupplung einer der Elektromagnetkupplungen 19 und 20 die jeweils zugeordnete Vereinzelungsvorrichtung gleichfalls schrittweise bewegt und einen schrittweisen Abtransport eines blattförmigen Aufzeichnungsträgers aus einem der Fächer 17 und 18 bewirkt.The single sheet conveyor 15 contains in Fig. 1 dashed compartments 17 and 18, in which sheet-shaped recording medium z. B. different formats can be stored, which are then removed in a manner to be described from the compartments 17 and 18 and fed to the platen roller 12. To separate the sheets from the compartments 17 and 18, 15 separating devices can be provided in the interior of the single sheet conveyor, which can optionally be actuated with electromagnetic clutches 19 and 20 provided on the outside of the single sheet conveyor 15. The electromagnetic clutches 19 and 20 belong to a drive system which, as an essential component, has a toothed belt 21 which is shown schematically in FIG. 1 with its course and which is connected by means of toothed rollers 22; 23; 24; 25; 26; 27 and is transported in the direction of the arrow shown in FIG. 1 when the toothed roller 22 also engages in a gear wheel 29, which in turn is coupled to a gear wheel which is seated on the axis of the platen roller 12. In this way, when the platen roller 12 is stepped forward, the toothed belt 21 is also stepped forward, so that when one of the electromagnetic clutches 19 and 20 is engaged, it also moves the associated separating device step by step and a step-by-step removal of a sheet-shaped recording medium from one of the compartments 17 and 18 causes.

Das Zahnrad 29, welches zum Einzelblattförderer 15 gehören kann, ist ein Kopplungszahnrad und wird beim Abschwenken des Einzelblattförderers 15 von dem auf der Schreibwalzenachse sitzenden Antriebszahnrad abgekoppelt.The gear 29, which can belong to the single sheet conveyor 15, is a coupling gear and is decoupled from the drive gear seated on the platen axis when the single sheet conveyor 15 is pivoted away.

Die gezahnte Rolle 26, die den Zahnriemen 21 an einer Stelle nahe der Rückseite des Einzelblattförderers 15 vorbeiführt, ist so angeordnet, daß sie in Eingriff mit einem Antriebszahnrad 28 gelangt, welches zu einem Endlosformularförderer 30 gehört. Der Endlosformularförderer 30 enthält mindestens zwei Stachelbandantriebe, was in Fig. 1 durch die gestrichelte Linie 31 angedeutet ist. Ferner sind mit dem Antriebszahnrad 28 gekoppelte weitere Zahnräder 32 und 33 vorgesehen, die für eine geeignete Transportrichtung und Transportgesrhwindigkeit des Endlosformularförderers 30 sorgen.The toothed roller 26, which passes the toothed belt 21 at a location near the rear of the single sheet conveyor 15, is arranged so that it comes into engagement with a drive gear 28, which belongs to an endless form conveyor 30. The endless form conveyor 30 contains at least two spiked belt drives, which is indicated in FIG. 1 by the dashed line 31. Further, 28 coupled further gear wheels 32 and 33 are provided with the drive gear, the h for a suitable transport direction and Transportgesr windiness ensure the continuous form feeder 30th

Die gezahnten Rollen 23; 24 und 25, über die der Zahnriemen 21 im vorderen Teil des Einzelblattförderers 15 geführt ist, sitzen auf den Achsen einer Abzugsvorrichtung, die im folgenden noch näher erläutert wird.The toothed rollers 23; 24 and 25, via which the toothed belt 21 is guided in the front part of the single sheet conveyor 15, sit on the axes of a pull-off device, which will be explained in more detail below.

Das Antriebszahnrad 28 des Endlosformularförderers 30 ist so angeordnet, daß es in die gezahnte Rolle 26 des Zahnriemens 21 eingreift, wenn der Endlosformularförderer 30 an den Einzelblattförderer 15 angesetzt ist. Wird der Endlosformularförderer 30 abgenommen, so wird das Antriebszahnrad 28 von der gezahnten Rolle 26 des Zahnriemens 21 abgekoppelt.The drive gear 28 of the endless form conveyor 30 is arranged so that it engages in the toothed roller 26 of the toothed belt 21 when the endless form conveyor 30 is attached to the single sheet conveyor 15. If the endless form conveyor 30 is removed, the drive gear 28 is uncoupled from the toothed roller 26 of the toothed belt 21.

Die Darstellung in Fig. 1 macht besonders deutlich, daß der Antrieb der beiden Zusatzgeräte, also des Einzelblattförderers 15 und des Endlosformularförderers 30, von dem Schrittantrieb des elektromechanischen Schreibwerks 10 her erfolgt, so daß also für den Einzelblattförderer 15 und den Endlosformularförderer 30 kein separater Antrieb und auch keine separate logische Steuerschaltung erforderlich ist. Die zur Betätigung der Elektromagnetkupplungen 19 und 20 erforderlichen elektrischen Steuersignale können von einer logischen Steuerschaltung abgeleitet werden, die bereits Teil des elektromechanischen Schreibwerks 10 ist.The illustration in Fig. 1 makes it particularly clear that the drive of the two additional devices, i.e. the single sheet conveyor 15 and the endless form conveyor 30, takes place from the step drive of the electromechanical writing mechanism 10, so that there is no separate drive for the single sheet conveyor 15 and the endless form conveyor 30 and no separate logic control circuit is required. The electrical control signals required to actuate the electromagnetic clutches 19 and 20 can be derived from a logic control circuit which is already part of the electromechanical writing mechanism 10.

In Fig. 2 ist eine schematische Schnittdarstellung der Gesamteinrichtung nach Fig. 1 gezeigt. Diese Darsteltung verdeutlicht das Prinzip des inneren Aufbaus der drei Geräte 10; 15 und 30 in Zuordnung zueinander. Dieses Prinzip entspricht der in der Büromaschinentechnik üblichen Konstruktion mit zwei seitlichen Platinen, zwischen denen die verschiedenen beweglichen Elemente gelagert sind. Gemäß der in Fig. 2 vorgesehenen Schnittdarstellung ist somit eine Platine 40 des Einzelblattförderers zu erkennen, die bei 16 schwenkbar mit dem Schreibwerk 10 verbunden ist und zwei Bolzen 41 und 42 aufweist, in die eine Platine 50 des Endlosformularförderers 31 mit einem Arm 51 eingehängt ist, der mit hierzu geeigneten Aussparungen 52 und 53 versehen ist. Ein entsprechender Aufbau ist auch für die andere Seite der Gesamteinrichtung vorgesehen, die in der Schnittdarstellung nach Fig. 2 nicht gezeigt ist und von der in Fig. 1 die Außenseite dargestellt ist.FIG. 2 shows a schematic sectional illustration of the overall device according to FIG. 1. This illustration illustrates the principle of the internal structure of the three devices 10; 15 and 30 in association with each other. This principle corresponds to the design customary in office machine technology with two side plates between which the various movable elements are mounted. According to the sectional view provided in FIG. 2, a board 40 of the single sheet conveyor can thus be seen, which is pivotally connected to the writing mechanism 10 at 16 and has two bolts 41 and 42, into which a board 50 of the endless form conveyor 31 is suspended with an arm 51 , which is provided with suitable recesses 52 and 53. A corresponding structure is also provided for the other side of the overall device, which is not shown in the sectional view according to FIG. 2 and of which the outside is shown in FIG. 1.

In dem elektromechanischen Schreibwerk 10 sind außer dem Druckkopf 11 und der Schreibwalze 12 eine logische Steuerschaltung 80 in Verbindung mit einem elektrischen Antriebsmotor 81 sowie einem Hauptantriebszahnrad 82 vorgesehen. Das Hauptantriebszahnrad 82 dreht die Schreibwalze 12 über ein in Fig. nicht dargestelltes weiteres Zahnrad auf der Schreibwalzenachse schrittweise, wozu der Antriebsmotor 81 entsprechend durch die logische Steuerschaltung 80 schrittweise betrieben wird.In addition to the print head 11 and the platen roller 12, a logic control circuit 80 in connection with an electric drive motor 81 and a main drive gear 82 are provided in the electromechanical writing mechanism 10. The main drive gear 82 rotates the platen roller 12 step by step via a further gear, not shown in FIG., On the platen axis, for which purpose the drive motor 81 is operated step by step by the logic control circuit 80.

Die Blattfächer 17 und 18 enthalten blattförmige Aufzeichnungsträger 55, die bei Betätigung der Vereinzelungsvorrichtungen 56 und 57 mit den in Fig. 1 gezeigten Elektromagnetkupplungen 19 und 20 über jeweils ein Führungsblech 58 und 59 der Schreibwalze 12 zugeführt werden. Hier gelangen sie gemäß bekannter Büromaschinentechnik zwischen die Schreibwalze 12 und die Andruckrollen 14 und werden in nicht näher dargestellter Weise um die Schreibwalze 12 herumgeführt. Anschließend werden sie von einer Abzugsvorrichtung aufgenommen, die aus unteren Transport- und Andruckrollen 60 und 61 sowie oberen Transport- und Andruckrollen 62 und 63 besteht. Die Transportrollen 60 und 61 sitzen auf einer Achse, die durch die in Fig. 1 gezeigte gezahnte Rolle 23 bzw. 25 über den Zahnriemen 21 gedreht wird. Die Abzugsvorrichtung bewirkt das Abziehen der Aufzeichnungsträger von der Schreibwalze und das Ablegen in einem Ablagefach 64, wenn die blattförmigen Aufzeichnungsträger aus dem Spalt der Transport- und Andruckrollen 62 und 63 austreten.The sheet compartments 17 and 18 contain sheet-shaped recording media 55 which, when the separating devices 56 and 57 are actuated, are fed to the platen roller 12 via a guide plate 58 and 59 with the electromagnetic clutches 19 and 20 shown in FIG. 1. Here they arrive according to known office machine technology between the platen roller 12 and the pinch rollers 14 and are guided around the platen roller 12 in a manner not shown. They are then picked up by a take-off device which consists of lower transport and pressure rollers 60 and 61 and upper transport and pressure rollers 62 and 63. The transport rollers 60 and 61 sit on an axis which is rotated by the toothed roller 23 and 25 shown in FIG. 1 over the toothed belt 21. The removal device causes the recording media to be pulled off the platen and placed in a storage compartment 64 when the sheet-shaped recording media emerge from the nip of the transport and pressure rollers 62 and 63.

Die Darstellung in Fig. 2 gibt die vorstehend beschriebene Führung blattförmiger Aufzeichnungsträger lediglich andeutungsweise wieder, wobei auf die bei den Vereinzelungsvorrichtungen 56 und 57 vorgesehenen Pfeile hingewiesen wird. Deutlich ist jedoch der Transportweg eines Endlosformulars 65 dargestellt, das bei 54 dem Endlosformularförderer 30 zugeführt und von seinen Transportvorrichtungen 31 aufgenommen wird. Das Endlosformular läuft dann durch einen Spalt, der durch den Boden des Aufnahmefachs 64 und ein Führungsblech 66 gebildet ist. Dieses Führungsblech ist an seiner Vorderkante so gekrümmt, daß das Endlosformular 65 abwärts geleitet wird. Hierzu kann ggf. noch ein weiteres Leitblech 67 vorgesehen sein. Das Endlosformular gelangt dann an die Schreibzeile, wozu es in an sich bekannter Weise um die Schreibwalze 12 herumgeführt wird und in nicht dargestellter Weise der Abzugsvorrichtung mit den Transport-und Andruckrollen 60 und 61 bzw. 62 und 63 zugeführt wird. Das Endlosformular wird beim Austritt aus dem Spalt zwischen den Rollen 62 und 63 jedoch nicht in das Blattfach 64 geleitet, sondern über eine Leitfläche 68 einer Austrittsstelle 69 zugeführt, wo es in bekannter Weise etwa in Zick-Zack-Faltung abgelegt werden kann. Die Leitfläche 68 kann beispielsweise gitterförmig ausgebildet sein und bei Abnahme des Endlosformularförderers 30 von dem Einzelblattförderer 15 gleichfalls entfernt werden, wozu sie z. B. in Schiebeführungen (nicht dargestellt) angeordnet sein kann, die an den Platinen 40 des Einzelblattförderers 15 vorgesehen sind.The representation in FIG. 2 only gives a hint of the above-described guidance of sheet-shaped recording media, reference being made to the arrows provided in the separating devices 56 and 57. However, the transport path of an endless form 65 is clearly shown, which is fed to the endless form conveyor 30 at 54 and taken up by its transport devices 31. The continuous form then runs through a gap which is formed by the bottom of the receiving compartment 64 and a guide plate 66. This guide plate is curved on its front edge so that the continuous form 65 is guided downwards. For this purpose, a further guide plate 67 can optionally be provided. The continuous form then arrives at the writing line, for which purpose it is guided around the platen roller 12 in a manner known per se and is fed in a manner not shown to the take-off device with the transport and pressure rollers 60 and 61 or 62 and 63. However, the continuous form is not passed into the sheet compartment 64 when it emerges from the gap between the rollers 62 and 63, but is fed via a guide surface 68 to an exit point 69, where it can be stored in a known manner, for example in a zigzag fold. The guide surface 68 can be designed, for example, in the form of a lattice and upon removal of the continuous form conveyor 30 can also be removed from the single sheet conveyor 15, for which purpose they are e.g. B. can be arranged in sliding guides (not shown), which are provided on the boards 40 of the single sheet conveyor 15.

Der vorstehend beschriebene Verlauf eines Endlosformulars 65 durch die Geräte 10; 15 und 30 bedarf weiterer, in Fig. 2 nicht dargestellter Führungsflächen, die für das Verständnis der Erfindung nicht erforderlich sind und deshalb hier nicht weiter erläutert werden müssen.The above-described course of an endless form 65 through the devices 10; 15 and 30 require further guide surfaces, not shown in FIG. 2, which are not necessary for understanding the invention and therefore do not need to be explained further here.

Die Andruckrollen 61 und 63 sind aus ihrer in Fig. 2 gezeigten Stellung lösbar, wie die neben ihnen gezeigten Pfeile andeuten. Dies kann beim Einzug eines Endlosformulars 65 vorteilhaft sein, um dabei ggf. auftretende Richtungsfehler zu beseitigen, da das Endlosformular beim Austritt bei 69 genau parallel zu seinem Verlauf an der Eintrittsstelle 54 zu führen ist. Die Ausrichtung im Sinne einer solchen Parallelführung erfolgt bei Lösen der Andruckrollen 61 und 63 und Durchführen der Transportbewegung selbsttätig.The pressure rollers 61 and 63 can be released from their position shown in FIG. 2, as indicated by the arrows next to them. This can be advantageous when pulling in an endless form 65, in order to eliminate any directional errors that may occur, since the continuous form is to be guided at 69 at the exit point 54 exactly at the exit at 69. The alignment in the sense of such a parallel guidance takes place automatically when the pressure rollers 61 and 63 are released and the transport movement is carried out.

Die Andruckrollen 14 an der Schreibwalze 12 sind im Endlosformularbetrieb von der Schreibwalze 12 zu lösen, was in Fig. 2 gleichfalls durch einen Pfeil dargestellt ist. Die Lösung der Andruckrollen 14 von der Schreibwalze 12 ist deshalb zweckmäßig, weil das Endlosformular 65 ausschließlich durch die Abzugsvorrichtung mit den Rollen 60; 61; 62 und 63 gezogen und durch den Endlosformularförderer 30 geschoben wird. Wie bereits erläutert, ist durch dieses Förderprinzip eine nur sehr geringe Transportkraft für das Endlosformular 65 erforderlich, denn die Spannung des Endlosformulars 65 ist nicht so groß, daß durch seine wiederholte Umlenkung erhöhte Reibungsverluste auftreten würden. Die Durchmesser der Transportrollen 60 und 62 der Abzugsvorrichtung sind so gewählt, daß gerade kein Durchhängen des Endlosformulars 65 beim Vorschub durch den Endlosformularförderer 30 auftritt. Gegebenenfalls kann auch die Oberfläche der Transportrollen 60 und 62 mit einem Material beschichtet sein, das einen gewissen Schlupf zwischen den Transportrollen 60 und 62 und dem Endlosformular 65 zuläßt, sobald ein Grenzwert der Zugbeanspruchung des Endlosformulars 65 überschritten wird.The pressure rollers 14 on the platen roller 12 can be released from the platen roller 12 in continuous form operation, which is also shown in FIG. 2 by an arrow. The solution of the pressure rollers 14 from the platen roller 12 is expedient because the continuous form 65 is only by the take-off device with the rollers 60; 61; 62 and 63 is pulled and pushed through the endless form conveyor 30. As already explained, this conveying principle requires only a very small transport force for the endless form 65, because the tension of the endless form 65 is not so great that increased frictional losses would occur due to its repeated deflection. The diameters of the transport rollers 60 and 62 of the take-off device are selected such that there is no sagging of the endless form 65 when it is being fed through the endless form conveyor 30. If necessary, the surface of the transport rollers 60 and 62 can also be coated with a material which allows a certain slip between the transport rollers 60 and 62 and the continuous form 65 as soon as a limit value of the tensile stress of the continuous form 65 is exceeded.

Unmittelbar vor der Schreibzeile, an der der Druckkopf 11 auf den jeweiligen auf der Schreibwalze 12 befindlichen Aufzeichnungsträger einwirkt, ist schematisch eine fotoelektrische Einheit 90 angedeutet. Diese kann beispielsweise eine Anordnung aus einem Lichtsender und einem Lichtempfänger sein, die ein elektrisches Signal abgibt, wenn sich der Reflexionsgrad der ihr gegenüberstehenden Fläche ändert, d. h., wenn die dunkle Schreibwalzenfläche durch einen Aufzeichnungsträger. abgedeckt wird und dessen Kante an der fotoelektrischen Einheit 90 vorbeiläuft. Das von ihr abgegebene Signal kann dann vorteilhaft dazu ausgenutzt werden, die logische Steuerschaltung 80 des Schreibwerks 10 im Sinne eines Starts des Druckvorgangs anzusteuern. Bei bisherigen Einzelblattförderern, die mit einem ihnen speziell zugeordneten Antrieb und einer eigenen logischen Steuerschaltung arbeiten, wurde der Abtransport blattförmiger Aufzeichnungsträger am jeweiligen Blattfach selbst festgestellt und dann die Zeit, innerhalb der die Vorderkante eines Blatts die Schreibzeile erreichen muß, durch digitales Abzählen bestimmt. Dies führte zu einem weiter erhöhten elektronischen Aufwand am Einzelblattförderer selbst und zu Ungenauigkeiten mindestens des Druckbeginns, da bei der Führung der Blätter zwischen den Blattfächern und der Schreibzeile mechanische Einflüsse und Transportfehler auftreten können, die mit einem von der Transportbewegung unabhängigen Zählvorgang nicht erfaßt werden können. Die Anordnung der fotoelektrischen Einheit 90 unmittelbar vor der Schreibzeile gewährleistet, daß unabhängig von Transportverzögerungen das Eintreffen einer Blattkante unmittelbar vor der Schreibzeile genau signalisiert werden kann. Das Signal, das das Eintreffen eines Einzelblattes an der Schreibzeile und damit die sichere Übernahme des Transportes durch den Schrittantrieb des Schreibwerks 10 anzeigt, steuert über die logische Anordnung 80 die Abschaltung der Elektromagnetkupplung 19; 20 der jeweiligen Vereinzelungsvorrichtung 56; 57. Durch die Ableitung von Steuerkriterien unmittelbar vor der Schreibzeile werden Fehler und Ungenauigkeiten beim Blatttransport ausgeschaltet, die bei bisherigen Zusammenstellungen von Schreibwerken und Einzelblattförderern unvermeidbar waren.Immediately in front of the writing line on which the print head 11 acts on the respective recording medium located on the platen roller 12, a photoelectric unit 90 is indicated schematically. This can be, for example, an arrangement of a light transmitter and a light receiver, which emits an electrical signal when the reflectance of the surface opposite it changes, i. i.e. when the dark platen surface is covered by a recording medium. is covered and the edge of which passes the photoelectric unit 90. The signal it emits can then advantageously be used to control the logic control circuit 80 of the writing mechanism 10 in the sense of starting the printing process. In previous single sheet conveyors, which work with a drive specially assigned to them and have their own logic control circuit, the removal of sheet-shaped recording media was determined at the respective sheet tray itself and then the time within which the leading edge of a sheet must reach the writing line was determined by digital counting. This led to a further increase in electronic expenditure on the single sheet conveyor itself and to inaccuracies at least at the start of printing, since mechanical influences and transport errors can occur when the sheets are guided between the sheet compartments and the writing line, which cannot be detected with a counting process that is independent of the transport movement. The arrangement of the photoelectric unit 90 immediately in front of the writing line ensures that the arrival of a sheet edge directly in front of the writing line can be signaled exactly regardless of transport delays. The signal, which indicates the arrival of a single sheet on the writing line and thus the safe assumption of transport by the stepping drive of the writing mechanism 10, controls the switching off of the electromagnetic clutch 19 via the logic arrangement 80; 20 of the respective separating device 56; 57. The derivation of control criteria immediately before the writing line eliminates errors and inaccuracies in sheet transport which were previously unavoidable when compiling writing mechanisms and single sheet conveyors.

Fig. 3 zeigt in einer verkleinerten Ansicht eine Betriebsstellung der Einrichtung mit angenommenem Endlosbandförderer 30. Der Einzelblattförderer 15 ist bei 16 so von dem Schreibwerk 10 abgeschwenkt, daß die Schreibwalze 12 von oben her zugänglich ist, um einen blattförmigen Aufzeichnungsträger etwa wie bei einer normalen Schreibmaschine manuell einzuziehen. Dies ist durch die strichpunktierte Linie 95 angedeutet.Fig. 3 shows a reduced view of an operating position of the device with an assumed endless belt conveyor 30. The single sheet conveyor 15 is pivoted at 16 from the writing mechanism 10 so that the platen roller 12 is accessible from above to a sheet-like recording medium, as in a normal typewriter to move in manually. This is indicated by the dash-dotted line 95.

In der abgeschwenkten Stellung zeigt Fig. 3 auch eine Klauenvorrichtung 92, die durch einen auf der anderen Seite des Einzelblattförderers 15 vorgesehenen Handhebel 93 betätigt werden kann, um sie von der Achse der Schreibwalze 12 zu entkoppeln. Eine derartige Klauenvorrichtung 92 mit Handhebel 93 kann beiderseits des Einzelblattförderers 15 vorgesehen sein und ist zweckmäßig mit einer Vorspannfeder 94 versehen, die die Klauenvorrichtung 92 so spannt, daß sie stets an der Achse der Schreibwalze 12 festgehalten wird.3 also shows a claw device 92 which can be actuated by a hand lever 93 provided on the other side of the single sheet conveyor 15 in order to decouple it from the axis of the platen roller 12. Such a claw device 92 with hand lever 93 can be provided on both sides of the single sheet conveyor 15 and is expediently provided with a biasing spring 94 which tensions the claw device 92 so that it is always held on the axis of the platen roller 12.

Abweichend von dem zuvor beschriebenen Ausführungsbeispiel kann die Abzugsvorrichtung vorteilhaft auch mit endlosen Transportbändern anstelle von Rollen 60 bis 63 ausgeführt sein, wobei die Transportbänder jeweils paarweise aneinanderliegend geführt sind und zwischen sich den jeweiligen Aufzeichnungsträger aufnehmen. Die Bemessung derartiger Transportelemente ist analog den vorstehenden Ausführungen über den Durchmesser der Transportrollen 60 und 62 durchzuführen, wobei hier die für die Endlosförderbänder vorgesehenen Umlenkrollen entsprechend zu dimensionieren sind.In a departure from the exemplary embodiment described above, the take-off device can advantageously also be designed with endless conveyor belts instead of rollers 60 to 63, the conveyor belts each being guided in pairs adjacent to one another and between the respective recording media ger record. The dimensioning of such transport elements is to be carried out analogously to the above statements about the diameter of the transport rollers 60 and 62, with the deflection rollers provided for the endless conveyor belts being dimensioned accordingly.

Eine Konstruktion nach der Erfindung ist in Verbindung mit Schreibwerken beliebiger Art einsetzbar. Insbesondere ist eine Schreibwalze für die Arbeitsweise der beschriebenen Einrichtung unwesentlich. So können beispielsweise auch Schreibwerke mit der erfindungsgemäßen Einrichtung ausgerüstet werden, die anstelle einer Schreibwalze ein feststehendes Schreiblineal als Gegenlage etwa für einen Nadeldruckkopf enthalten.A construction according to the invention can be used in connection with any type of writing mechanism. In particular, a platen roller is immaterial for the operation of the device described. For example, typewriters can also be equipped with the device according to the invention which, instead of a platen, contain a fixed writing ruler as a counterpart for a needle printhead, for example.

Claims (14)

1. Apparatus for the stepwise feeding of recording carriers (55; 65) to an electromechanical printing system (10), in which the respective recording carrier (55; 65) is moved by a stepper drive and a removal device (60; 62) past a printing line, wherein a single-sheet feeder (15) is provided for feeding sheet-like recording carriers (55) to the printing line, characterised in that a continuous form feeder (30) with conveying direction in the same direction as the single-sheet feed can be attached to the single-sheet feeder (15), the drive (28) of which continuous form feeder is coupled to the drive (21) of the single-sheet feeder (15), and in that the removal device comprises vonveying elements (60; 62), the circumference of which is calculated or designed for the purpose of a steady predetermined tension of the respective recording carrier (55; 65).
2. Device according to Claim 1, characterised in that the drive of the single-sheet feeder (15) is coupled to the stepper drive (81) of the printing system (10).
3. Device according to Claim 1 or 2, characterised in that a printing system is provided with a printing roller (12) coupled to the stepper drive (81), the pressure rollers (14) of which can be released from the printing roller (12) when recording on continuous forms (65).
4. Device according to Claim 3, characterised in that the drive of the single-sheet feeder (15) is effected by coupling to the printing roller shaft.
5. Device according to Claim 4, characterised in that the single-sheet feeder (15) has a toothed-belt drive (21; 22 to 27), the belt (21) of which is guided over toothed wheels (22, 26) provided respectively at the coupling point with the printing system (10) and at the coupling point with the continuous form feeder (30) which toothed wheels engage respectively in a drive toothed wheel provided at the printing system (10) and in a drive toothed wheel provided at the continuous form feeder (30) and optionally via an intermediate toothed wheel (29).
6. Device according to Claim 5, characterised in that the drive toothed wheel provided at the printing system (10) is mounted on the printing roller shaft.
7. Device according to one of the preceding claims, characterised in that the removal device comprises pressure rollers (61; 63) opposite the conveying rollers (60; 62), which pressure rollers are optionally releasable from the pressing positon.
8. Device according to one of the preceding claims, characterised in that the single-sheet feeder (15) is pivotally mounted on the printing system (10) by means of a pivoting device (16) in such a way that, by swinging away, it frees the printing system (10) for manual sheet insertion and printing operation.
9. Device according to Claim 8, characterised in that locking of the single-sheet feeder to the printing system (10) is effected by means of resiliently tensioned, manually operable catches (92) on the printing roller shaft.
10. Device according to one of the preceding claims, characterised in that the single-sheet feeder (15) comprises at least one sheet tray (17; 18), downwardly inclined preferably in the direction of conveying movement, for sheet-type recording carriers (55) with a separating device (56; 57) associated therewith, which by an electromagnetic coupling (19; 20) can be coupled to a stepper drive (21) and the respective electro-magnetic coupling (19; 20) is preferably controllable by control signals derived from the logic control unit (80) of the printing system (10).
11. Device according to one of the preceding claims, characterised in that in the immediate vicinity of the printing line of the printing system there is arranged an optical-electronic unit (90) which is lined up with a recording carrier (55) fed to the printing line and is connected to the logic control unit (80) of the printing system.
12. Device according to one of Claims 10 or 11, characterised in that several sheet trays (17; 18) are provided, preferably for different sheet sizes.
13. Device according to one of Claims 10 to 12, characterised in that above the sheet tray or the sheet trays (17; 18) there is provided essentially parallel thereto a conveying guide (66) for a continuous form (65) emerging from the continuous form feeder (30), the conveying guide being adjoined by a downward guide means (67) with which the continous form (65) is guided in the direction of the printing line along a path converging with the feed path (58; 59) of sheet-type recording carriers (55), and that a common removal path is provided for sheet-type recording carriers (55) and for continuous forms (65).
14. Device according to one of the preceding claims, characterised in that the continuous form feeder (30) has retaining arms (51) on its lateral plates (50), which are provided with recesses (52; 53) for insertion between pins (41; 42) which are provided on the lateral plates (40) of the single-sheet feeder (15).
EP81101617A 1980-04-15 1981-03-06 Device for a gradual conveyance of recording conveyers to an electro-mechanic writing system Expired EP0038415B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81101617T ATE5641T1 (en) 1980-04-15 1981-03-06 DEVICE FOR THE STEP-BY-STEP FEEDING OF RECORDING CARRIERS TO AN ELECTROMECHANICAL RECORDING DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3014430A DE3014430C2 (en) 1980-04-15 1980-04-15 Device for the step-by-step feeding of recording media to an electromechanical writing mechanism
DE3014430 1980-04-15

Publications (2)

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EP0038415A1 EP0038415A1 (en) 1981-10-28
EP0038415B1 true EP0038415B1 (en) 1983-12-21

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US (1) US4391542A (en)
EP (1) EP0038415B1 (en)
AT (1) ATE5641T1 (en)
DE (1) DE3014430C2 (en)

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Also Published As

Publication number Publication date
DE3014430C2 (en) 1984-08-23
EP0038415A1 (en) 1981-10-28
US4391542A (en) 1983-07-05
DE3014430A1 (en) 1981-10-22
ATE5641T1 (en) 1984-01-15

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