EP0127868B1 - Paper draw-in device for typewriters or office machines with a paper-compensating gap disposed in the paper-guiding channel - Google Patents
Paper draw-in device for typewriters or office machines with a paper-compensating gap disposed in the paper-guiding channel Download PDFInfo
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- EP0127868B1 EP0127868B1 EP84106087A EP84106087A EP0127868B1 EP 0127868 B1 EP0127868 B1 EP 0127868B1 EP 84106087 A EP84106087 A EP 84106087A EP 84106087 A EP84106087 A EP 84106087A EP 0127868 B1 EP0127868 B1 EP 0127868B1
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- European Patent Office
- Prior art keywords
- paper
- spring
- draw
- scanning
- compensating gap
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- 239000010410 layer Substances 0.000 claims 1
- 239000002356 single layer Substances 0.000 claims 1
- 238000004804 winding Methods 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
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Classifications
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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
- 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
- B41J11/20—Platen adjustments for varying the strength of impression, for a varying number of papers, for wear or for alignment, or for print gap adjustment
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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
- 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
- B41J15/18—Multiple web-feeding apparatus
Definitions
- the invention relates to a paper feed device for printing devices according to the preamble of claim 1.
- a paper guide for automatically operated office machines is known in which the paper guide trough is designed to be pivotable against a spring force and cooperates with an electrical switch.
- the paper guide roller is pivoted away. Due to the swiveling movement of the paper guide trough, the guide channel opens to the rear in a funnel shape, whereby part of the jam folds are released. If the jam folds are not completely released, the further swiveling of the paper guide trough leads to an actuation of a switch and to an interruption of the advance.
- the object of the invention is to design a paper feed device of the type mentioned at the outset in such a way that single-ply or multilayer paper is smoothed before being fed to the paper guide channel and processed with as little loss as possible.
- Another advantageous embodiment of the paper feed device is characterized in claim 2.
- a paper compensation gap is arranged in the entrance area of the rigid paper guide channel, which compensates for curvatures of the winding end of the paper, the paper can be written completely. Too strong folds at the end of the winding, which may lead to jamming of the paper in the paper guide channel, are recognized in good time via the scanning device coupled to the paper compensation gap and a warning device is actuated and / or the paper feed is interrupted.
- a rigid paper tray By arranging such a paper compensation gap, a rigid paper tray can be used, since unevenness in the paper is compensated for before it is drawn into the paper tray.
- An inexpensive, relatively low-performance stepper motor can be used as the drive for the paper feed, the so-called line motor.
- Multiply folded paper ends can no longer get into the narrow gap between the platen roller and a sensitive mosaic print head, since the scanner interrupts the paper feed in the event of a paper jam.
- the paper feed device of a line printing device in this case a teleprinter, shown in the figures contains a matrix print head (not shown here) that can be moved along a platen.
- the paper feed device itself consists of a platen roller S which is rotatable and motorized driven in a housing G is mounted. Below the platen roller S, connected to the platen roller S via a gearbox M, is a paper transport shaft P with a barrel-shaped paper pressure roller R mounted thereon and firmly connected to the paper transport shaft P.
- the paper transport shaft P with the paper pressure roller R is located at the end of the through a paper guide plate B limited paper guide channel and is fixed on one side in the housing G and with its end pivotable according to the direction of the arrow in a loop SCH of an arm of a frame-supported spring clip F.
- the paper pressure roller R can be pressed more or less strongly against the platen roller S or the intermediate paper AZ via the spring clip F.
- the paper pressure roller R can also be swiveled out completely for insertion and adjustment.
- the spring bracket F mounted in guides L is operatively connected with its other arm to a swivel lever H which is rotatably mounted about an axis A.
- the swivel lever H consists of an actual grip piece GR and an attachment piece AN arranged below the grip piece.
- the spring clip F rests against this end piece AN with one torsion.
- the paper pressure roller R can be pivoted away from the platen roller S via the pivot lever H, in accordance with the direction of the arrow shown.
- a scanning spring clip AF is provided to detect the presence of the paper in the paper guide.
- the scanning spring clip AF reaches with its loop-shaped bent scanning end AE through an opening in the paper guide plate B and is supported on the platen roller S.
- the scanning spring clip AF itself is bent several times with its outermost end in a recess LO of the paper guide plate B, wherein it is pressed against the edge of the recess LO by a spring FE.
- the scanning spring bracket AF is guided by an eccentric guide piece FS of the pivot lever H, which is arranged with respect to the axis of rotation A, the part of the scanning spring clip AF located between the guide piece FS and the scanning end AE having a U-shaped course and on an electrical scanning device designed as a switch EL is present.
- a paper compensation gap is arranged in the entrance area of the paper guide channel.
- This paper compensation gap consists of the stationary paper guide plate B and a slide S1 which is displaceable relative to the paper guide plate B.
- the slide SI which is made of plastic, engages behind the scanning spring clip AF with a side part ST, namely at a lead distance VA.
- the slider SI In the middle of the slider SI there is a recess AS into which a locking lug RN attached to the housing G of the printing device engages.
- the smallest slot width of the paper compensation gap is determined by the dimension AB.
- the springs FD acting on the slide on its side parts ST and SE hold the slide SI on the system (detent RN).
- An additional spring FDZ arranged on a recess of the side part SE of the slider SI is designed so that the stroke of the slider is either parallel to the paper tray or leads on the ST side.
- the warning lamp W thus lights up and the switching relay SR is actuated.
- the switching reliability is increased.
- the scanning tether bracket AF will lay on the platen roller S as a result of its spring behavior in accordance with the direction of the arrow shown after passage of the paper AZ. This also moves the TK button head in the direction of the arrow and closes the warning circuit. Even then the warning lamp W lights up and indicates the end of the paper.
- the motor can be briefly actuated again using a release device, not shown here.
- the warning lamp W also lights up when the pivoting lever H for pivoting the paper transport shaft P in Arrow direction is moved.
- the scanning spring bracket AF is pivoted by the movement over the eccentric guide piece FS, which in turn closes the warning circuit and thus lights up the warning lamp W.
- the embodiment according to FIG. 2 differs from FIG. 1 in that the return springs for the slider SI consist of a single spring wire FDD braced in the holders HL of the fixed part of the paper compensation gap.
- the ends of the spring wire FDD engage in recesses AS of the slide.
- a one-sided advance of the slide is generated via a stop ASS arranged at the lead spacing VA, in order to increase the switching reliability on the scanning device EL, as already described.
- a latch RNN is formed on the slide SI, which interacts with a latch hook RH on the printer housing.
- the slider SI can be held in the open position to z. B. to facilitate paper loading.
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- Handling Of Sheets (AREA)
- Handling Of Continuous Sheets Of Paper (AREA)
Description
Die Erfindung betrifft eine Papiereinzugsvorrichtung für Druckeinrichtungen gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a paper feed device for printing devices according to the preamble of claim 1.
Bei Schreib- oder Büromaschinen, wie sie z. B. Fernschreibmaschinen darstellen, die als Aufzeichnungsträger einoder mehrlagiges Rollenpapier verwenden, ist das Wickelende des Rollenpapiers je nach Papierhersteller unterschiedlich. So kann sich bei Verwendung von mehrlagigem Papier am Wickelende eine starke Krümmung auffalten, die zum Durchzug durch den Papierführungskanal einen kräftigen Zeilenmotor benötigt. Ausgeprägte Faltungen am Wickelende können dabei zum Blockieren des Zeilenantriebes führen.In typewriters or office machines, as z. B. Teletype machines that use single or multi-ply roll paper as the recording medium, the winding end of the roll paper differs depending on the paper manufacturer. When using multilayer paper, a strong curvature can unfold at the end of the winding, which requires a powerful line motor to pull through the paper guide channel. Pronounced folds at the end of the winding can block the line drive.
Um starke Krümmungen des Wickelendes auszugleichen, wäre es deshalb notwendig, sehr starke, in ihren Dimensionen unhandliche bzw. teure Zeilenmotoren einzubauen. Am Wickelende auftretenden Faltungen führen durch Blockieren des Zeilenantriebes zu Informationsverlusten.In order to compensate for strong curvatures of the winding end, it would therefore be necessary to install very strong line motors which are bulky or expensive in their dimensions. Folding that occurs at the end of the winding leads to loss of information by blocking the line drive.
Aus der DE-AS 25 03 642 ist eine Papierführung für automatisch betriebene Büromaschinen bekannt, bei der die Papierführungswanne entgegen einer Federkraft verschwenkbar ausgestaltet ist und mit einem elektrischen Schalter zusammenwirkt. Beim Einziehen von einen Papierstau auslösenden Staufalten des Papiers zwischen die Papierführungswanne und die Schreibwalze wird die Papierführungswanrie abgeschwenkt. Durch die Schwenkbewegung der Papierführungswanne öffnet sich der Führungskanal trichterförmit nach hinten, wodurch sich ein Teil der Staufalten löst. Werden die Staufalten nicht vollständig gelöst, führt das weitere Abschwenken der Papierführungswanne zu einer Betätigung eines Schalters und zu einer Unterbrechung des Vortriebes.From DE-AS 25 03 642 a paper guide for automatically operated office machines is known in which the paper guide trough is designed to be pivotable against a spring force and cooperates with an electrical switch. When paper jams causing paper jams are drawn in between the paper guide trough and the platen roller, the paper guide roller is pivoted away. Due to the swiveling movement of the paper guide trough, the guide channel opens to the rear in a funnel shape, whereby part of the jam folds are released. If the jam folds are not completely released, the further swiveling of the paper guide trough leads to an actuation of a switch and to an interruption of the advance.
Ein Glätten des Papiers vor dem Einzug in den Papierführungskanal ist nicht möglich.It is not possible to smooth the paper before it is fed into the paper guide channel.
Unterbricht man zur Vermeidung von Funktionsstörungen den Papiervorschub, wenn sich das Ende des zu beschreibenden Papieres noch weit vom Eingang des Papierführungskanales entfernt befindet, hat dies einen hohen Papierverbrauch zur Folge.If the paper feed is interrupted to avoid malfunctions when the end of the paper to be written is still far away from the entrance of the paper guide channel, this results in high paper consumption.
Es ist weiterhin aus der US-PS 4 227 821 eine Druckeinrichtung zum Beschreiben von Endlospapier bekannt, bei der im Bereich des starren Papierführungskanals - der trogförmig ausgebildet ist - ein J-förmiges Abtastelement zum Abtasten des Vorhandenseins von Papier vorgesehen ist. Ist kein Papier vorhanden, so betätigt das Abtastelement einen Schalter, ist Papier eingezogen wird das Abtastelement vom Schalter abgehoben.It is also known from US Pat. No. 4,227,821 a printing device for writing on continuous paper, in which a J-shaped scanning element for scanning the presence of paper is provided in the region of the rigid paper guide channel - which is of trough-shaped design. If there is no paper, the scanning element actuates a switch; if paper is drawn in, the scanning element is lifted off the switch.
Aufgabe der Erfindung ist es, eine Papiereinzugsvorrichtung der eingangs genannten Art derart auszugestalten, daß ein-oder mehrlagiges Papier vor der Zuführung zum Papierführungskanal geglättet und möglichst verlustlos verarbeitet wird.The object of the invention is to design a paper feed device of the type mentioned at the outset in such a way that single-ply or multilayer paper is smoothed before being fed to the paper guide channel and processed with as little loss as possible.
Diese Aufgabe wird bei einer Papiereinzugsvorrichtung der eingangs genannten Art gemäß dem kennzeichnenden Teil des ersten Patentanspruches gelöst.This object is achieved in a paper feed device of the type mentioned at the outset in accordance with the characterizing part of the first claim.
Eine weitere vorteilhafte Ausführungsform der Papiereinzugsvorrichtung ist im Anspruch 2 gekennzeichnet.Another advantageous embodiment of the paper feed device is characterized in claim 2.
Dadurch, daß im Eingangsbereich des starren Papierführungskanals ein Papierausgleichsspalt angeordnet ist, der Krümmungen des Wickelendes des Papieres ausgleicht, kann das Papier vollständig beschrieben werden. Zu starke Faltungen am Wickelende die evtl. zu einem Verklemmen des Papieres im Papierführungskanal führen können, werden rechtzeitig über die mit dem Papierausgleichsspalt gekoppelte Abtasteinrichtung erkannt und eine Warneinrichtung betätigt und/oder der Papiervorschub unterbrochen.The fact that a paper compensation gap is arranged in the entrance area of the rigid paper guide channel, which compensates for curvatures of the winding end of the paper, the paper can be written completely. Too strong folds at the end of the winding, which may lead to jamming of the paper in the paper guide channel, are recognized in good time via the scanning device coupled to the paper compensation gap and a warning device is actuated and / or the paper feed is interrupted.
Durch die Anordnung eines derartigen Papierausgleichsspaltes kann eine starre Papierwanne verwendet werden, da Unebenheiten des Papieres vor dem Einzug in die Papierwanne ausgeglichen werden. Als,Antrieb für den Papiervorschub, den sogenannten Zeilenmotor, kann ein preisqünstiger relativ leistungsschwacher Schrittmotor verwendet werden.By arranging such a paper compensation gap, a rigid paper tray can be used, since unevenness in the paper is compensated for before it is drawn into the paper tray. An inexpensive, relatively low-performance stepper motor can be used as the drive for the paper feed, the so-called line motor.
Mehrfach gefaltete Papierenden können nicht mehr in den engen Spalt zwischen Schreibwalze und einem empfindlichen Mosaikschreibkopf geraten, da bei Papierstau die Abtasteinrichtung den Papiervorschub unterbricht.Multiply folded paper ends can no longer get into the narrow gap between the platen roller and a sensitive mosaic print head, since the scanner interrupts the paper feed in the event of a paper jam.
Bei der Verwendung in Fernschreibmaschinen oder anderen kommunikationsfähigen Textendgeräten wird ein gestörter Papiervorschub durch Papierkrümmungen rechtzeitig erkannt, so daß empfangene Informationen nicht verloren gehen können.When used in teleprinters or other communication-capable text terminals, a disturbed paper feed due to paper curvatures is recognized in good time so that received information cannot be lost.
Das vollständige Beschreiben des Papieres ermöglicht ein nahezu verlustloses Verarbeiten des gesamten Papiervorrates.The complete writing of the paper enables an almost lossless processing of the entire paper supply.
Ausführungsformen der Erfindung sind in den Zeichnungen dargestellt und im folgenden beispielsweise näher beschrieben. Es zeigen
- Figur 1 eine schematische Darstellung einer Papiereinzugsvorrichtung für Zeilendruckeinrichtungen mit einem im Papierführungskanal angeordneten Ausgleichsspalt,
- Figur 2 eine schematische Darstellung einer Ausführungsform des Papierausgleichsspaltes mit einer aus Federdraht bestehenden Feder und einem Rastelement und
- Figur 3 eine ausschnittweise Schnittdarstellung eines Teilbereiches der Fig. 2 zur Erläuterung des Rastelementes.
- FIG. 1 shows a schematic illustration of a paper feed device for line printing devices with a compensation gap arranged in the paper guide channel,
- Figure 2 is a schematic representation of an embodiment of the paper compensation gap with a spring made of spring wire and a locking element and
- Figure 3 is a partial sectional view of a portion of FIG. 2 to explain the locking element.
Die in den Figuren dargestellte Papiereinzugsvorrichtung einer Zeilendruckeinrichtung, in diesem Falle einer Fernschreibmaschine, enthält einen hier nicht dargestellte, entlang einer Schreibwalze bewegbaren Matrixdruckkopf. Die Papiereinzugsvorrichtung selbst besteht aus einer Schreibwalze S die drehbar und motorisch angetrieben in einem Gehäuse G gelagert ist. Unterhalb der Schreibwalze S befindet sich, über ein Getriebe M mit der Schreibwalze S verbunden, eine Papiertransportwelle P mit einer darauf gelagerten und mit der Papiertransportwelle P fest verbundenen tonnenförmigen Papierandruckrolle R. Die Papiertransportwelle P mit der Papierandruckrolle R befindet sich am Ende des durch ein Papierführungsblech B begrenzten Papiertührungskanales und ist einseitig fest im Gehäuse G und mit ihrem Ende entsprechend der Pfeilrichtung schwenkbar in einer Schlaufe SCH eines Armes eines gestellgestützten Federbügels F gelagert. Abhängig von der Art des verwendeten Aufzeichnungsträgers (Endlospapier, Ein- und Mehrlagenrollenpapier, Einzelblätter) kann über den Federbügel F die Papierandruckrolle R mehr oder weniger stark an die Schreibwalze S bzw. das dazwischenliegende Papier AZ gedrückt werden. Zum Einlegen und Justieren ist außerdem ein totales Abschwenken der Papierandruckrolle R möglich. Zu diesem Zwecke ist der in Führungen L gelagerte Federbügel F mit seinem anderen Arm in Wirkverbindung mit einem Schwenkhebel H, der um eine Achse A drehbar gelagert ist.The paper feed device of a line printing device, in this case a teleprinter, shown in the figures contains a matrix print head (not shown here) that can be moved along a platen. The paper feed device itself consists of a platen roller S which is rotatable and motorized driven in a housing G is mounted. Below the platen roller S, connected to the platen roller S via a gearbox M, is a paper transport shaft P with a barrel-shaped paper pressure roller R mounted thereon and firmly connected to the paper transport shaft P. The paper transport shaft P with the paper pressure roller R is located at the end of the through a paper guide plate B limited paper guide channel and is fixed on one side in the housing G and with its end pivotable according to the direction of the arrow in a loop SCH of an arm of a frame-supported spring clip F. Depending on the type of recording medium used (continuous paper, single and multi-ply roll paper, single sheets), the paper pressure roller R can be pressed more or less strongly against the platen roller S or the intermediate paper AZ via the spring clip F. The paper pressure roller R can also be swiveled out completely for insertion and adjustment. For this purpose, the spring bracket F mounted in guides L is operatively connected with its other arm to a swivel lever H which is rotatably mounted about an axis A.
Der Schwenkhebel H besteht aus einem eigentlichen Griffstück GR und einem unterhalb des Griffstückes angeordneten Ansatzstück AN. Im dargestellten angedrückten Zustand der Papierandruckrolle R, liegt unter Torsionswirkung der Federbügel F mit einem Ende an diesem Ansatzstück AN an. Über den Schwenkhebel H, kann entsprechend der dargestellten Pfeilrichtung die Papierandruckrolle R von der Schreibwalze S weggeschwenkt werden.The swivel lever H consists of an actual grip piece GR and an attachment piece AN arranged below the grip piece. In the illustrated pressed state of the paper pressure roller R, the spring clip F rests against this end piece AN with one torsion. The paper pressure roller R can be pivoted away from the platen roller S via the pivot lever H, in accordance with the direction of the arrow shown.
Zum Erkennen des Vorhandenseins des Papiers in der Papierführung ist ein Abtastfederbügel AF vorgesehen. Der Abtastfederbügel AF greift mit seinem schlaufenförmig umgebogenen Abtastende AE durch eine Öffnung des Papierführungsbleches B und stützt sich auf der Schreibwalze S ab. Der Abtastfederbügel AF selbst ist mehrfach umgebogen mit seinem äußersten Ende in einer Ausnehmung LO des Papierführungsbleches B gelagert, wobei er an den Rand der Ausnehmung LO über eine Feder FE gedrückt wird. Der Abtastfederbügel AF wird dabei durch ein exzentrisches, gegenüber der Drehachse A angeordnetes Führungsstück FS des Schwenkhebels H geführt, wobei der zwischen dem Führungsstück FS und dem Abtastende AE gelegene Teil des Abtastfederbügels AF einen U-förmigen Verlauf hat und an einer als Schalter ausgebildeten elektrischen Abtasteinrichtung EL anliegt.A scanning spring clip AF is provided to detect the presence of the paper in the paper guide. The scanning spring clip AF reaches with its loop-shaped bent scanning end AE through an opening in the paper guide plate B and is supported on the platen roller S. The scanning spring clip AF itself is bent several times with its outermost end in a recess LO of the paper guide plate B, wherein it is pressed against the edge of the recess LO by a spring FE. The scanning spring bracket AF is guided by an eccentric guide piece FS of the pivot lever H, which is arranged with respect to the axis of rotation A, the part of the scanning spring clip AF located between the guide piece FS and the scanning end AE having a U-shaped course and on an electrical scanning device designed as a switch EL is present.
Im Eingangsbereich des Papierführungskanales ist ein Papierausgleichsspalt angeordnet. Dieser Papierausgleichsspalt besteht aus dem ortsfesten Papierführungsblech B und einem gegenüber dem Papierführungsblech B verschieblichen Schieber Sl. Der aus Kunststoff bestehende Schieber SI hintergreift mit einem Seitenteil ST den Abtastfederbügel AF, und zwar in einem Vorlaufabstand VA.A paper compensation gap is arranged in the entrance area of the paper guide channel. This paper compensation gap consists of the stationary paper guide plate B and a slide S1 which is displaceable relative to the paper guide plate B. The slide SI, which is made of plastic, engages behind the scanning spring clip AF with a side part ST, namely at a lead distance VA.
In der Mitte des Schiebers SI befindet sich eine Ausnehmung AS, in die eine am Gehäuse G der Druckeinrichtung befestigte Rastnase RN eingreift. Die kleinste Schlitzbreite des Papierausgleichsspaltes wird dabei durch das Maß AB bestimmt. Die an dem Schieber an seinen Seitenteilen ST und SE angreifenden Federn FD halten den Schieber SI an der Anlage (Rastnase RN). Eine zusätzliche an einer Ausnehmung des Seitenteiles SE des Schiebers SI angeordnete Feder FDZ ist so ausgelegt, daß der Hub des Schiebers entweder parallel zur Papierwanne erfolgt oder auf der Seite ST voreilt.In the middle of the slider SI there is a recess AS into which a locking lug RN attached to the housing G of the printing device engages. The smallest slot width of the paper compensation gap is determined by the dimension AB. The springs FD acting on the slide on its side parts ST and SE hold the slide SI on the system (detent RN). An additional spring FDZ arranged on a recess of the side part SE of the slider SI is designed so that the stroke of the slider is either parallel to the paper tray or leads on the ST side.
Das Zusammenwirken des Abtastfederbügels AF mit der elektrischen Abtasteinrichtung EL, dem Federbügel F und dem Schieber SI ist wie folgt :
- Befindet sich im Papierführungskanal ein Papier, in diesem Fall ein mehrlagiges Rollenpapier AZ mit stark gekrümmten Enden AZE, so wird das Abtastende AE und damit der Abtastfederbügel AF von der Schreibwalze S abgehoben. Der Schwenkhebel H befindet sich dabei in der dargestellten Grundposition mit angedrückter Papierandruckrolle R. Die elektrische Abtasteinrichtung EL liegt mit ihrem Tastenknopf TK an dem Mittelstück des Abtastfederbügels AF an. Im dargestellten Zustand mit eingelegtem Papier ist also die elektrische Abtasteinrichtung EL gedrückt und damit ein in der elektrischen Abtasteinrichtung EL enthaltener Schalter geöffnet. Der geöffnete Schalter unterbricht einen aus einer Stromquelle BT und einer Warnlampe W mit nachgeschaltetem Schaltrelais SR bestehenden Stromkreis, so daß die Warnlampe W gelöscht ist.
- If there is paper in the paper guide channel, in this case a multilayer roll paper AZ with strongly curved ends AZE, the scanning end AE and thus the scanning spring clip AF are lifted off the platen roller S. The pivot lever H is in the basic position shown with the paper pressure roller R pressed on. The electrical scanning device EL rests with its key button TK on the center piece of the scanning spring clip AF. In the state shown with the paper inserted, the electrical scanning device EL is thus pressed, and thus a switch contained in the electrical scanning device EL is opened. The open switch interrupts a circuit consisting of a current source BT and a warning lamp W with a switching relay SR connected downstream, so that the warning lamp W is extinguished.
Gelangt nun ein stark gekrümmtes Papierende AZE des Mehrlagenpapieres AZ in den Papierausgleichsspalt, so wird der Schieber SI weggedrückt. Dabei wird nach einem Vorlauf VA mit der Kante des Seitenteiles ST des Schiebers SI der Abtastfederbügel AF von der Anlage am Papierführungsblech B abgezogen und nach Ausgleich des Schalthubes HU der Schalter in der elektrischen Abtasteinrichtung EL geschlossen.If a strongly curved paper end AZE of the multi-ply paper AZ now gets into the paper compensation gap, the slide SI is pushed away. After a lead VA with the edge of the side part ST of the slide SI, the scanning spring bracket AF is pulled off from the system on the paper guide plate B and, after compensation for the switching stroke HU, the switch in the electrical scanning device EL is closed.
Damit leuchtet die Warnlampe W auf und das Schaltrelais SR wird betätigt. Durch das Voreilen des Schiebers SI über den Vorlaufabstand VA am Seitenteil ST wird erreicht, daß die Schaltsicherheit sich erhöht.The warning lamp W thus lights up and the switching relay SR is actuated. By advancing the slide SI over the lead distance VA on the side part ST, the switching reliability is increased.
Kann das Papier mit seinem Papierende AZE ungestört den Papierausgleichsspalt durchlaufen, so legt sich der Abtasttederbügel AF in Folge seines Federverhaltens entsprechend der dargestellten Pfeilrichtung nach Durchlauf des Papieres AZ an die Schreibwalze S an. Dadurch wird der Tastenkopf TK ebenfalls in Pfeilrichtung bewegt und der Warnstromkreis geschlossen. Auch dann leuchtet die Warnlampe W auf und zeigt das Papierende an. Um das Papier vollständig aus der Papierführung zu entfernen, kann über eine hier nicht dargestellte Auslöseeinrichtung der Motor nochmals kurzzeitig betätigt werden.If the paper with its paper end AZE can pass through the paper compensation gap undisturbed, the scanning tether bracket AF will lay on the platen roller S as a result of its spring behavior in accordance with the direction of the arrow shown after passage of the paper AZ. This also moves the TK button head in the direction of the arrow and closes the warning circuit. Even then the warning lamp W lights up and indicates the end of the paper. In order to completely remove the paper from the paper guide, the motor can be briefly actuated again using a release device, not shown here.
Dieses Aufleuchten der Warnlampe W erfolgt auch, wenn der Schwenkhebel H zum Verschwenken der Papiertransportwelle P in Pfeilrichtung bewegt wird. Durch die Bewegung über das exzentrische Führungsstück FS wird der Abtastfederbügel AF verschwenkt, was wiederum ein Schließen des Warnstromkreises und damit ein Aufleuchten der Warnlampe W zur Folge hat.The warning lamp W also lights up when the pivoting lever H for pivoting the paper transport shaft P in Arrow direction is moved. The scanning spring bracket AF is pivoted by the movement over the eccentric guide piece FS, which in turn closes the warning circuit and thus lights up the warning lamp W.
Die Ausführungsform entsprechend der Fig. 2 unterscheidet sich von der Fig. 1 dadurch, daß die Rückholfedern für den Schieber SI aus einem einzigen in den Halterungen HL des ortsfesten Teil des Papierausgleichsspaltes verspannten Federdraht FDD bestehen. Die Enden des Federdrahtes FDD greifen dabei in Ausnehmungen AS des Schiebers ein. Entsprechend der Ausführungsform der Fig. 1 wird über einen im Vorlaufabstand VA angeordneten Anschlag ASS ein einseitiger Vorlauf des Schiebers erzeugt, um - wie bereits beschrieben - die Schaltsicherheit an der Abtasteinrichtung EL zu erhöhen.The embodiment according to FIG. 2 differs from FIG. 1 in that the return springs for the slider SI consist of a single spring wire FDD braced in the holders HL of the fixed part of the paper compensation gap. The ends of the spring wire FDD engage in recesses AS of the slide. According to the embodiment of FIG. 1, a one-sided advance of the slide is generated via a stop ASS arranged at the lead spacing VA, in order to increase the switching reliability on the scanning device EL, as already described.
Zusätzlich noch ist entsprechend der Schnittdarstellung der Fig. 3 am Schieber SI eine Rastnase RNN ausgebildet, die mit einem Rasthaken RH am Druckergehäuse zusammenwirkt. Durch das Verrasten der Rastnase RNN hinter dem Rasthaken RH kann der Schieber SI in geöffneter Stellung gehalten werden, um z. B. das Papiereinlegen zu erleichtern.In addition, in accordance with the sectional view of FIG. 3, a latch RNN is formed on the slide SI, which interacts with a latch hook RH on the printer housing. By locking the locking lug RNN behind the locking hook RH, the slider SI can be held in the open position to z. B. to facilitate paper loading.
Claims (2)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3319961A DE3319961C2 (en) | 1983-06-01 | 1983-06-01 | Paper feed device for printing devices, in particular typewriters or office machines |
| DE3319961 | 1983-06-01 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0127868A2 EP0127868A2 (en) | 1984-12-12 |
| EP0127868A3 EP0127868A3 (en) | 1985-05-22 |
| EP0127868B1 true EP0127868B1 (en) | 1987-09-09 |
Family
ID=6200488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84106087A Expired EP0127868B1 (en) | 1983-06-01 | 1984-05-28 | Paper draw-in device for typewriters or office machines with a paper-compensating gap disposed in the paper-guiding channel |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4549826A (en) |
| EP (1) | EP0127868B1 (en) |
| JP (1) | JPS606488A (en) |
| DE (2) | DE3319961C2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4592670A (en) * | 1984-06-29 | 1986-06-03 | International Business Machines Corporation | Angular motion paper feed release system |
| JPS6353070A (en) * | 1986-08-25 | 1988-03-07 | Hitachi Ltd | Thermal transfer recorder |
| JPH065894Y2 (en) * | 1987-03-03 | 1994-02-16 | ブラザー工業株式会社 | Printer |
| DE3822497A1 (en) * | 1987-12-02 | 1989-10-19 | Kotterer Grafotec | DEVICE FOR PREVENTING MACHINE DAMAGE |
| DE3903438C2 (en) * | 1989-02-06 | 1998-07-09 | Gmt Medizinische Technik Gmbh | Modular hip joint endoprosthesis |
| US5419644A (en) * | 1993-06-03 | 1995-05-30 | Hewlett-Packard Company | Print medium handling system including cockle springs to control pen-to-print medium spacing during printing |
| US5393151A (en) * | 1993-06-03 | 1995-02-28 | Hewlett-Packard Company | Print medium handling system including cockle ribs to control pen-to-print medium spacing during printing |
| JP4646465B2 (en) * | 2000-09-05 | 2011-03-09 | キヤノン株式会社 | RECORDING MEDIUM CONVEYING DEVICE AND RECORDING DEVICE HAVING THE RECORDING MEDIUM CONVEYING DEVICE |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1176156B (en) * | 1961-08-25 | 1964-08-20 | Nobuo Morisawa | Paper holder |
| US3722773A (en) * | 1969-12-29 | 1973-03-27 | G Plate | Jam detector |
| US3860234A (en) * | 1971-01-04 | 1975-01-14 | Standard Register Co | Apparatus for control of travel of sheets |
| US3875860A (en) * | 1972-02-04 | 1975-04-08 | Walter W Barber | Sheet sensor for offset printer |
| DE2503642C3 (en) * | 1975-01-29 | 1981-04-23 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Paper guide for automatically operated office machines |
| US4141660A (en) * | 1975-03-19 | 1979-02-27 | Kienzle Apparate Gmbh | Printer for data-processing machine having single operator station |
| FR2370596A1 (en) * | 1976-11-10 | 1978-06-09 | Dubois Alain | Airway ticket printing machine - has shutter hinged to top part of feeder with ticket holding mounted on arm attached to endless belt |
| US4111565A (en) * | 1977-03-28 | 1978-09-05 | Xerox Corporation | Apparatus for sensing when paper utilized in a printer has been depleted |
| US4154437A (en) * | 1977-07-15 | 1979-05-15 | Diebold, Incorporated | Multiple bill detector for currency dispensers |
| US4227821A (en) * | 1978-09-20 | 1980-10-14 | Durango Systems, Inc. | Web drive mechanism for line/series printers |
| US4469454A (en) * | 1980-11-04 | 1984-09-04 | Wang Laboratories, Inc. | Print wheel mounting arrangement for print head and ribbon cartridge assembly |
| JPS57122305A (en) * | 1981-01-08 | 1982-07-30 | Ricoh Co Ltd | Detection of thickness of sheet-shaped object |
| US4420151A (en) * | 1981-08-17 | 1983-12-13 | Glory Kogyo Kabushiki Kaisha | Overlapping feed detection device in sheet-processing machine |
| FR2519583A1 (en) * | 1982-01-12 | 1983-07-18 | Smh Alcatel | TRAINING AND PRINTING MECHANISM FOR POSTAGE MACHINE |
| GB2113187B (en) * | 1982-01-12 | 1985-05-22 | Ncr Co | Apparatus for detecting the passage of multiple superposed documents along a feed path |
| JPS58224938A (en) * | 1982-06-22 | 1983-12-27 | Toppan Printing Co Ltd | Detector for double-feeding of paper sheets |
-
1983
- 1983-06-01 DE DE3319961A patent/DE3319961C2/en not_active Expired
-
1984
- 1984-05-16 US US06/610,866 patent/US4549826A/en not_active Expired - Fee Related
- 1984-05-28 DE DE8484106087T patent/DE3465933D1/en not_active Expired
- 1984-05-28 EP EP84106087A patent/EP0127868B1/en not_active Expired
- 1984-06-01 JP JP59111101A patent/JPS606488A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0127868A2 (en) | 1984-12-12 |
| US4549826A (en) | 1985-10-29 |
| DE3465933D1 (en) | 1987-10-15 |
| EP0127868A3 (en) | 1985-05-22 |
| DE3319961C2 (en) | 1986-03-13 |
| DE3319961A1 (en) | 1984-12-06 |
| JPS606488A (en) | 1985-01-14 |
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