EP0031137A2 - Device for determining the side margins of record sheets in typewriters or the like - Google Patents
Device for determining the side margins of record sheets in typewriters or the like Download PDFInfo
- Publication number
- EP0031137A2 EP0031137A2 EP80107990A EP80107990A EP0031137A2 EP 0031137 A2 EP0031137 A2 EP 0031137A2 EP 80107990 A EP80107990 A EP 80107990A EP 80107990 A EP80107990 A EP 80107990A EP 0031137 A2 EP0031137 A2 EP 0031137A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- scanning
- arrangement
- circuit arrangement
- led
- receiver
- 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.)
- Granted
Links
- 230000005855 radiation Effects 0.000 claims abstract description 6
- 238000011156 evaluation Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 abstract 4
- 230000000284 resting effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/42—Scales and indicators, e.g. for determining side margins
Definitions
- the scanning device is moved along an electromotive drive device along the writing roller with the Woliram lamp switched on.
- the object of the invention is to provide a device such as e.g. the typewriters to provide a device that makes it possible to recognize an inserted recording medium with sufficient certainty, even under difficult conditions, in order to be able to determine its position on the paper system.
- the evaluation circuit arrangement is designed in such a way that it moves the pulse-operated scanning arrangement along the paper system as a function of a search signal which triggers a search and thereby divides each of the individual basic scanning path sections Total scanning path assigns a plurality of individual scanning pulses, and that the evaluation circuit arrangement in each case evaluates the scanning pulses of each basic scanning path jointly.
- the invention relates to a device for printing devices, in particular ink mosaic writing devices, having a write head moved line by line along a recording medium and a device for recognizing the position of a recording medium lying against a paper system or the like using a scanning arrangement comprising a radiation source and a receiver in a downstream, in Depending on the presence of a recording medium, an identification signal generating evaluation circuit arrangement.
- DE-AS 28 50 632 This is a printing device with a printing mechanism for printing on writing material, which contains a transducer arrangement, for scanning the writing material in the printing device, specifically for sensing the position of the writing material on the paper roll.
- a scanning arrangement which consists of a radiation source from a lamp with tungsten filament, and in which two photoresistors are provided as the receiver.
- the writing material is scanned in that the light emitted by the tungsten lamp is received by the photo sensors and a control circuit is provided.
- Pulse-wise scanning in connection with an evaluation, which summarizes the impulses of a small distance, eliminates both extraneous light influences and also influences of dust or other disturbances that could lead to incorrect scanning.
- this special form of scanning can also be used to detect incorrect, e.g. torn or perforated paper are clearly recognized, or such torn paper does not lead to false evaluations.
- a schematically illustrated ink mosaic writing head In a writing printing device with an ink writing head, which is not shown completely here, a schematically illustrated ink mosaic writing head.
- TS is moved line by line along a recording medium A via an electromotive device.
- a scanning arrangement comprising a light-emitting light-emitting diode LED and a phototransistor FT as a receiver is located on the write head itself.
- a paper storage surface is arranged to receive the recording medium A, the front side of which is designed as a reflection surface RF.
- the reflection surface can consist of polished metal or similar materials reflecting electromagnetic radiation. The length of the reflection path corresponds approximately to the entire scanning distance of the scanning arrangement.
- an automatic search run to detect the position of the recording medium A on the reflection surface RF is triggered via a circuit arrangement which is not shown here in detail.
- the write head TS with the attached scanning arrangement consisting of the light emitting diode LD and the photo transistor FT is moved over the entire length of the reflection surface RF.
- the scanning arrangement A is operated in a pulsed manner in such a way that the entire scanning path X is broken down into individual basic scanning paths B1-BN and a certain number, in this case five, of triggering pulses is triggered in the region of these individual basic scanning paths B.
- the flash of light emanating from the light-emitting diode LED is reflected by the reflection surface RF and strikes a photo transistor FT and generates a receive pulse IE in the collector-emitter path of the photo transistor FT.
- the phototransistor FT is connected to the input of a threshold switch IC via a capacitor C1, which has the task of switching off external light influences.
- the switching threshold of this threshold switch IC is now set via a voltage divider consisting of the resistors R4 and R5 (the reference symbols R1-R6 denote general resistances) so that it lies below the switching threshold.
- the output ICA of the threshold switch IC is low-ohmic to 0 V.
- a diode D2 which connects the output ICA to the input ICE of the threshold switch, becomes conductive and pulls the input ICE to a DC voltage level which is above the switching threshold.
- the output ICA of the threshold switch IC remains at the operating voltage until a reset pulse starting from the output P2 by briefly applying ground potential to the input ICE of the threshold switch and thus the circuit arrangement is put on standby again.
- This reset pulse P2 may result from the pulse encoder P outgoing pulses can be obtained.
- the pulse P2 can, for example, actuate a switch (not shown here) which briefly connects the input ICE of the threshold switch IC to ground potential.
- a logic circuit arrangement L connected downstream of the threshold switch IC which can be of any design, 'now evaluates the voltage profile US at the output of the threshold switch ICA differently. In order to exclude the influence of dust, for example, as shown in FIG. 3, it is sufficient if the logic circuit arrangement L examines every basic scanning path, whether the threshold switch IC at its output ICA was once in the area of this basic scanning path. If this is not the case within this basic scanning distance B, the logic circuit arrangement L evaluates this as the lateral edge of the recording medium A and stores this position in a memory SP.
- this position can now be evaluated in such a way that the logical arrangement L the ink writing head via an electromotive drive device AS to the edge of the recording medium A or if there is still an edge left on the recording medium A. to a specific range from the edge of the recording medium A removed. positioned.
Landscapes
- Accessory Devices And Overall Control Thereof (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Character Spaces And Line Spaces In Printers (AREA)
Abstract
Description
die das unterschiedliche Reflexionsvermsgen der Schreibwalze und des Schreibmaterials erkennt. Zur Feststellung der Lage des Schreibmaterials wird die Abtasteinrichtung über eine elektromotorische Antriebseinrichtung entlang von der Schreibwalze bei eingeschalteter Woliramlampe bewegt.which recognizes the different reflectance of the platen and the writing material. In order to determine the position of the writing material, the scanning device is moved along an electromotive drive device along the writing roller with the Woliram lamp switched on.
Das Problem bei derartigen Abtastungen besteht nun darin, daß die Aussage "Papier vorhanden" oder "kein Papier vorhanden" auch unter erschwerten Bedingungen hinreichend sicher sein muß. So darf weder eine verstaubte Reflexionsfläche noch Spezialpapiere, seien sie nun transparent oder glänzend oder mit Löchern, z.B. Perforationen, versehen, zu einer fehlerhaften Auswertung führen.The problem with such scans is that the statement "paper available" or "no paper available" must be sufficiently reliable even under difficult conditions. So neither a dusty reflection surface nor special papers, be they transparent or glossy or with holes, e.g. Perforations, provided, lead to an incorrect evaluation.
Aufgabe der Erfindung ist es, eine Einrichtung, wie z.B. der Schreibmaschinen, eine Vorrichtung bereitzustellen, die es ermöglicht, einen eingelegten Aufzeichnungsträger auch unter erschwerten Bedingungen hinreichend sicher zu erkennen, um da-mit seine Lage auf der Papieranlage bestimmen zu können.The object of the invention is to provide a device such as e.g. the typewriters to provide a device that makes it possible to recognize an inserted recording medium with sufficient certainty, even under difficult conditions, in order to be able to determine its position on the paper system.
Diese Aufgabe wird bei einer Vorrichtung der eingangs genannten Art gemäß der Erfindung dadurch gelöst, daß die Auswerteschaltungsanordnung derart ausgestaltet ist, daß sie abhängig von einem einen Suchlauf auslösenden Suchsignal die pulsweise betriebene Abtastanordnung entlang der Papieranlage bewegt und dabei jeder der in einzelne Basis-Abtastwegstrecken unterteilten Gesamtabtaststrecke eine Mehrzahl von einzelnen Abtastimpulsen zuordnet, und daß die Auswerteschaltungsanordnung jeweils die Abtastimpulse jeder Basisabtastwegstrecke gemeinsam auswertet.This object is achieved in a device of the type mentioned at the outset according to the invention in that the evaluation circuit arrangement is designed in such a way that it moves the pulse-operated scanning arrangement along the paper system as a function of a search signal which triggers a search and thereby divides each of the individual basic scanning path sections Total scanning path assigns a plurality of individual scanning pulses, and that the evaluation circuit arrangement in each case evaluates the scanning pulses of each basic scanning path jointly.
Vorrichtung für Schreibmaschinen oder dergleichen zum Bestimmen der seitlichen Ränder des Aufzeichnungsträgers.Device for typewriters or the like for determining the lateral edges of the record carrier.
Die Erfindung betrifft eine Vorrichtung für Druckeinrichtungen, insbesondere Tintenmosaikschreibeinrichtungen, mit einem zeilenweise.entlang von einem Aufzeichnungsträger bewegten Schreibkopf und einer Einrichtung zum Erkennen der Lage eines an einer Papieranlage oder dergleichen anliegenden Aufzeichnungsträgers unter Verwendung einer Abtastanordnung aus einer Strahlungsquelle und einem Empfänger in nachgeschalteter, in Abhängigkeit von dem Vorhandensein eines Aufzeichnuhgsträgers ein Erkennungssignal generierenden Auswerteschaltungsanordnung.The invention relates to a device for printing devices, in particular ink mosaic writing devices, having a write head moved line by line along a recording medium and a device for recognizing the position of a recording medium lying against a paper system or the like using a scanning arrangement comprising a radiation source and a receiver in a downstream, in Depending on the presence of a recording medium, an identification signal generating evaluation circuit arrangement.
Vorrichtungen der eingangs genannten Art sind aus der DE-AS 28 50 632 bekannt. Dabei handelt es sich um eine Druckvorrichtung mit einem Druckmechanismus zum Bedrucken von Schreibmaterial, die eine Wandleranordnung enthält, zur Abtastung des Schreibmaterials in der Druckvorrichtung, und zwar zur Ertastung der Lage des Schreibmaterials auf der Papierrolle.Devices of the type mentioned are known from DE-AS 28 50 632. This is a printing device with a printing mechanism for printing on writing material, which contains a transducer arrangement, for scanning the writing material in the printing device, specifically for sensing the position of the writing material on the paper roll.
Bei dieser Druckvorrichtung ist eine Abtastanordnung angeordnet, die aus einer Strahlungsquelle aus einer Lampe mit Wolframfaden besteht, und bei der als Empfänger zwei Fotowiderstände vorgesehen sind. Die Abtastung des Schreibmaterials erfolgt dabei dadurch, daß das von der Wolframlampe ausgesandte Licht von den Fotosensoren empfangen wird und eine Steuerschaltung vorgesehen ist, Durch impulsweise Abtastung in Verbindung mit einer Auswertung, die die Impulse einer kleinen Wegstrecke jeweils zusammenfaßt, werden sowohl Fremdlichteinflüsse als auch Einflüsse von Staub oder sonstigen Störungen, die zu einer Fehlabtastung führen könnten, ausgeschlossen.In this printing device, a scanning arrangement is arranged, which consists of a radiation source from a lamp with tungsten filament, and in which two photoresistors are provided as the receiver. The writing material is scanned in that the light emitted by the tungsten lamp is received by the photo sensors and a control circuit is provided. Pulse-wise scanning in connection with an evaluation, which summarizes the impulses of a small distance, eliminates both extraneous light influences and also influences of dust or other disturbances that could lead to incorrect scanning.
Bei einer vorteilhaften Ausführungsform der Erfindung, beider die Auswerteschaltungsanordnung mehrerer aufeinanderfolgende einer Auswertegruppe zugeordnete Basisabtastwegentscheidung treffende logische Schaltungsanordnung ein gemeinsames Erkennungssignal generiert, kann durch diese spezielle Form der Abtastung, kann diese auch von fehlerhaften, z.B. eingerissenem oder mit Löchern versehenem Papier eindeutig erkannt werden, bzw. führt ein derartig eingerissenes Papier nicht zu Fehlauswertungen.In an advantageous embodiment of the invention, in the case of which the evaluation circuit arrangement of a plurality of successive basic circuit path decisions assigned to an evaluation group generates a common detection signal, this special form of scanning can also be used to detect incorrect, e.g. torn or perforated paper are clearly recognized, or such torn paper does not lead to false evaluations.
Ausführungsformen der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden anhand dieser Zeichnungen beispielsweise näher beschrieben. Es zeigen
- Fig. 1 eine schematische Darstellung der Abtasteinrichtung in einer Tintenmosaikschreibeinrichtung,
- Fig. 2 ein Blockschaltbild zur Ansteuerung der Abtasteinrichtung,
- Fig. 3 ein Impulsdiagramm zur Erläuterung der Schaltungsanordnung entsprechend der Fig. 2 bei teilweise mit staubbedeckter Papieranlage und
- Fig. 4 ein Impulsdiagramm, das den Impulsverlauf in der Schaltungsanordnung gemäß der Fig. 2 bei fehlerhaftem Papier zeigt.
- 1 is a schematic representation of the scanning device in an ink mosaic writing device,
- 2 is a block diagram for controlling the scanning device,
- Fig. 3 is a timing diagram to explain the circuit arrangement corresponding to FIG. 2 with partially covered with dust and paper
- Fig. 4 is a timing diagram showing the pulse waveform in the circuit arrangement of FIG. 2 with defective paper.
Bei einer hier nicht vollständig dargestellten Schreibdruckeinrichtung mit einem Tintenschreibkopf wird über eine elektromotorische Einrichtung ein schematisch dargestellter Tintenmosaikschreibkopf.TS zeilenweise ent- --lang von einem Aufzeichnungsträger A bewegt. Am Schreib- kopf selbst befindet sich eine Abtastanordnung aus einer lichtemittierenden Leuchtdiode LED und einem Fototransistor FT als Empfänger. Zur Aufnahme des Aufzeichnungsträgers A ist eine Papierablagefläche angeordnet, deren Vorderseite als Reflexionsfläche RF ausgebildet ist. Die Reflexionsfläche kann dabei aus poliertem Metall oder ähnlichen elektromagnetischen Strahlungen reflektiertenden Materialien bestehen. Die Länge der Reflexionsstreckeentspricht etwa der gesamten Abtaststrecke der Abtastanord.-nung.In a writing printing device with an ink writing head, which is not shown completely here, a schematically illustrated ink mosaic writing head.TS is moved line by line along a recording medium A via an electromotive device. A scanning arrangement comprising a light-emitting light-emitting diode LED and a phototransistor FT as a receiver is located on the write head itself. A paper storage surface is arranged to receive the recording medium A, the front side of which is designed as a reflection surface RF. The reflection surface can consist of polished metal or similar materials reflecting electromagnetic radiation. The length of the reflection path corresponds approximately to the entire scanning distance of the scanning arrangement.
Die Funktion dieser Abtastanordnung zur Erkennung der Lage des Aufzeichnungsträgers A auf der Reflexionsfläche RF wird nun im folgenden anhand der Schaltungsanordnung der Fig. 2 mit dem zugehörigen Impulsdiagramm der Fig. 3 und 4 erläutert:The function of this scanning arrangement for recognizing the position of the recording medium A on the reflection surface RF is now explained below with reference to the circuit arrangement of FIG. 2 with the associated pulse diagram of FIGS. 3 and 4:
Vor jeder Aufnahme des Schreibbetriebes bei eingelegtem Aufzeichnungsträger A der Druckvorrichtung wird über eine hier nicht im einzelnen dargestellte Schaltungsanordnung ein automatischer Suchlauf zur Erkennung der Lage des Aufzeichnungsträgers A auf der Reflexionsfläche RF ausgelöst. Zu diesem Zwecke wird der Schreibkopf TS mit der daran befestigten Abtastanordnung aus der Leuchtdiode LD und dem Fototransistor FT über die gesamte Län--ge der Reflexionsfläche RF bewegt. Die Abtastanordnung A wird dabei impulsweise betrieben und zwar derart, daß man die gesamte Abtaststrecke X in einzelne Basisabtastwegstrecken B1-BN zerlegt und im'Bereich dieser einzelnen Basisabtastwegstrecken B eine bestimmte Anzahl,in diesem Falle fünf, Abtastimpulse auslöst. Dies wird gemäß der Schaltungsanordnung der Fig. 2 dadurch bewerkstelligt, daß über einen Impulsgeber P über seinen Ausgang P1 ein Schalttransistor T1 geöffnet wird und damit die Leucht- diode LED an eine Spannungquelle U gelegt wird. Infolge des impulsartigen Betriebes dieser Leuchtdiode LED kann diese Leuchtdiode mit einem höheren Strom als dem üblichen Strom (in diesem Falle ca. 500mA) betrieben werden, ohne daß sie Schaden nimmt. Damit ist eine höhere Lichtausbeute möglich.Before each start of the writing operation with the recording medium A of the printing device inserted, an automatic search run to detect the position of the recording medium A on the reflection surface RF is triggered via a circuit arrangement which is not shown here in detail. For this purpose, the write head TS with the attached scanning arrangement consisting of the light emitting diode LD and the photo transistor FT is moved over the entire length of the reflection surface RF. The scanning arrangement A is operated in a pulsed manner in such a way that the entire scanning path X is broken down into individual basic scanning paths B1-BN and a certain number, in this case five, of triggering pulses is triggered in the region of these individual basic scanning paths B. According to the circuit arrangement in FIG. 2, this is accomplished by that a switching transistor T1 is opened via a pulse generator P via its output P1 and thus the light-emitting diode LED is connected to a voltage source U. Due to the pulsed operation of this LED LED, this LED can be operated with a higher current than the usual current (in this case about 500mA) without being damaged. This enables a higher light output.
Der von der Leuchtdiode LED ausgehende Lichtblitz wird von der Reflexionsfläche RF reflektiert.und trifft auf einen Fototransistor FT und erzeugt in der Kollektor-Emitter-Strecke des Fototransistors FT einen Empfangs- impuls IE.The flash of light emanating from the light-emitting diode LED is reflected by the reflection surface RF and strikes a photo transistor FT and generates a receive pulse IE in the collector-emitter path of the photo transistor FT.
Der Fototransistor FT steht über einen Kondensator C1, der die Aufgabe hat, Fremdlichteinflüsse auszuschalten, mit dem Eingang eines Schwellwertschalters IC in Verbindung. Die Schaltschwelle dieses Schwellwertschalters IC ist nun über einen Spannungsteiler aus den Widerständen R4 und R5 (die Bezugszeichen R1-R6 bezeichnen allgemeine Widerstände) so eingestellt, daß er unterhalb der Schaltschwelle.liegt. Der Ausgang ICA des Schwellwertschalters IC liegt in diesem Falle niederohmig auf 0 V. Bei Empfang eines Blitzes am Fototransistor F.T wird die Eingangsspannung am Schwellwertschalter IC kurzzeitig über die Schaltschwelle angehoben. Der Ausgang ICA schaltet auf Betriebsspannung U um (5V). Eine den Ausgang ICA mit dem Eingang ICE des Schwellwertschalters verbindende Diode D2 wird in diesem Falle leitend und zieht den Eingang ICE auf einen Gleichspannungspegel der über der Schaltschwelle liegt. Durch diesen Selbsthalteeffekt bleibt der Ausgang ICA des Schwellwertschalters IC solange auf Betriebsspannung bis über einen Rücksetzimpuls ausgehend vom Ausgang P2 durch kurzzeitiges Anlegen Massepotential an den Eingang ICE der Schwellwertschalter und damit die Schaltungsanordnung wieder in Bereitschaft versetzt wird. Dieser Rücksetzimpuls P2 kann aus der Folge der vom Impulsgeber P ausgehenden Impulse gewonnen werden. Der Impuls P2 kann dabei z.B. einen hier nicht dargestellten Schalter betätigen, der kurzzeitig den Eingang ICE des Schwellwertschalters IC an Massepotential legt.The phototransistor FT is connected to the input of a threshold switch IC via a capacitor C1, which has the task of switching off external light influences. The switching threshold of this threshold switch IC is now set via a voltage divider consisting of the resistors R4 and R5 (the reference symbols R1-R6 denote general resistances) so that it lies below the switching threshold. In this case, the output ICA of the threshold switch IC is low-ohmic to 0 V. When a flash is received at the photo transistor FT, the input voltage at the threshold switch IC is briefly raised above the switching threshold. The ICA output switches to the operating voltage U (5V). In this case, a diode D2, which connects the output ICA to the input ICE of the threshold switch, becomes conductive and pulls the input ICE to a DC voltage level which is above the switching threshold. As a result of this self-holding effect, the output ICA of the threshold switch IC remains at the operating voltage until a reset pulse starting from the output P2 by briefly applying ground potential to the input ICE of the threshold switch and thus the circuit arrangement is put on standby again. This reset pulse P2 may result from the pulse encoder P outgoing pulses can be obtained. The pulse P2 can, for example, actuate a switch (not shown here) which briefly connects the input ICE of the threshold switch IC to ground potential.
Trifft der von einer Leuchtdiode LED ausgehende Licht- strahl auf an der Reflexionsfläche RF haftenden Staub, so kann entsprechend der Darstellung der Fig. 3 in den Bereichen S der Wegstrecke X empfängerseitig kein Stromimpuls IE entstehen. Bedingt durch den Selbsthalteeffekt des Schwellwertschalters IC hat die Unterbrechung des Lichtstrahles auf die Ausgangsspannung US des Schwellwertschalters IC dann keinen Einfluß, wenn das Staubpartikel- ' chen kleiner ist als der Bereich der durch eine Basisabtastwegstecke B abgetastet wird. Denn wie aus Fig. 3 ersichtlich, genügt ein Empfangsimpuls IE, um den Ausgang des Schwellwertschalters IC'auf Potential :zu bringen. .If the light beam emanating from a light-emitting diode LED hits dust adhering to the reflection surface RF, then according to the illustration in FIG. 3 no current pulse IE can occur in the areas S of the path X on the receiver side. Due to the self holding effect of the threshold switch IC has the interruption of the light beam on the output voltage US of the threshold switch IC, when the levels of particulates chen 'is smaller then no influence than the area which is scanned by a Basisabtastwegstecke B. Because, as can be seen from FIG. 3, a receive pulse IE is sufficient to bring the output of the threshold value switch IC 'to potential: .
Eine dem Schwellwertschalter IC nachgeschaltete logische Schaltungsanordnung L, die beliebig ausgeführt sein kann,' wertet den Spannungsverlauf US am Ausgang des Schwellwertschalters ICA nun verschieden aus. Um z.B. entsprechend der Darstellung der Fig. 3 den Einfluß von Staub auszuschließen, genügt es, wenn die logische Schaltungsanordnung L jede Basisabtastwegstrecke untersucht, ob der -Schwellwertschalter IC an seinem Ausgang ICA einmal im Bereich dieser Basisabtastwegstrecke auf Potential war. Ist dies innerhalb dieser Basisabtastwegstrecke B nicht .der Fall, so wertet die logische Schaltungsanordnung L dies als seitlichen Rand des Aufzeichnungsträgers A und speichert diese Position in einem Speicher SP. Nach Ende des Sucblaufes kann nun diese Position derart ausgewertet werden, daß die logische Anordnung L den Tintenschreibkopf über eine elektromotorische Antriebseinrichtung AS an den Rand des Aufzeichnungsträgers A oder falls auf dem Aufzeichnungsträger A noch ein Rand freigehalten sein soll, einen bestimmten Bereich vom Rand des Aufzeichnungsträgers A entfernt.positioniert.A logic circuit arrangement L connected downstream of the threshold switch IC, which can be of any design, 'now evaluates the voltage profile US at the output of the threshold switch ICA differently. In order to exclude the influence of dust, for example, as shown in FIG. 3, it is sufficient if the logic circuit arrangement L examines every basic scanning path, whether the threshold switch IC at its output ICA was once in the area of this basic scanning path. If this is not the case within this basic scanning distance B, the logic circuit arrangement L evaluates this as the lateral edge of the recording medium A and stores this position in a memory SP. After the end of the scan, this position can now be evaluated in such a way that the logical arrangement L the ink writing head via an electromotive drive device AS to the edge of the recording medium A or if there is still an edge left on the recording medium A. to a specific range from the edge of the recording medium A removed. positioned.
Wird entsprechend der Darstellung der Fig. 4 die Abtastanordnung über den Aufzeichnungsträger A bewegt, so werden am Fototransistor FT keine Stromimpulse IE erzeugt, womit der Ausgang des Schwellwertschalters IC beständig auf einem Spannungspotential entsprechend dem Impulszug US bleibt. Tritt nun im Bereich des Anfzeichnungsträgers A ein Riß oder eine durch Verschmutzung bedingte Verfärbung auf, so kann dies entsprechend der Darstellung der Fig. 4 am Orte FP zu Empfangsimpulsen IE führen. Diese Empfangsimpulse IE würden ausgangsseitig des Schwellwertschalters IC zu einer Anhebung der Spannung US führen, was in Verbindung mit der logischen Anordnung zu einer Fehlmeldung führen würde. Diese logische Anordnung L kann nun derart ausgestaltet sein, daß sie mehrere aufeinanderfolgende Basiswegstrecken zu einer gemeinsamen Auswertegruppe zusammenfaßt und aus dieser Gruppe ein gemeinsames mehrheitsabhängiges Erkennungssignal generiert. Dies bedeutet in dem Falle von einem fehlerhaften Papier, daß z.B. der Abtastung von drei aufeinanderfolgenden Basisabtastwegstrecken B ein durch das fehlerhafte Papier hervorgerufene Impuls US1 keine Fehlmeldung am Ausgang der logischen Schaltungsanordnung L hervorruft.If the scanning arrangement is moved over the recording medium A as shown in FIG. 4, no current pulses IE are generated at the phototransistor FT, so that the output of the threshold switch IC remains constantly at a voltage potential corresponding to the pulse train US. If a crack or discoloration due to soiling now occurs in the area of the marking carrier A, this can lead to receive pulses IE at the location FP, as shown in FIG. 4. These receive pulses IE would lead to an increase in the voltage US on the output side of the threshold switch IC, which in connection with the logical arrangement would lead to an error message. This logical arrangement L can now be designed in such a way that it combines a plurality of successive base paths into a common evaluation group and generates a common majority-dependent detection signal from this group. In the case of defective paper, this means that e.g. After the scanning of three successive basic scanning paths B, a pulse US1 caused by the defective paper does not cause an error message at the output of the logic circuit arrangement L.
Claims (8)
dadurch gekennzeichnet, daB die Auswerteschaltungsanordnung (IC) derart ausgestaltet ist, daß sie abhängig von einem einen Suchlauf auslösenden Suchsignal die pulsweise betriebene Abtastanordnung (LEO,FT) entlang der Papieranlage (RF) bewegt und dabei jeder der in einzelne Basisabtastwegstrecken (B1-BN) unterteilten Gesamtabtaststrecke eine Mehrzahl von einzelnen Abtastimpulsen zuordnet, und daß die Auswerteschaltungsanordnnung jeweils die Abtastimpulse jeder Basisabtastwegstrekke (B) gemeinsam auswertet.1.Device of printing devices, in particular ink mosaic writing devices with a writing head moved line by line along a recording medium and a device for recognizing the position of a recording medium lying against a paper system or the like, using a scanning arrangement comprising a radiation source and a receiver with a downstream, depending on the presence an evaluation circuit arrangement generating a detection signal of a record carrier,
characterized in that the evaluation circuit arrangement (IC) is designed in such a way that it moves the pulse-operated scanning arrangement (LEO, FT) along the paper system (RF) as a function of a search signal which triggers a search and thereby each of the individual basic scanning paths (B1-BN) divided a total of individual scanning pulses, and that the evaluation circuit arrangement in each case evaluates the scanning pulses of each basic scanning path (B) together.
dadurch gekennzeichnet , daß die Auswerteschaltungsanordnung (IL,L) aufeinanderfolgende, .eine Auswertegruppe zugeordnete Basisabtastwegstrecken (B) ge- meinsam erfaBt und über eine Niehrheitsentscheidung treffende logische Schaltungsanordnung (L) ein gemeinsames Erkennungssignal generiert.2. Device according to claim 1,
characterized in that the evaluation circuit arrangement (IL, L) detects successive basic scanning paths (B) assigned to an evaluation group and generates a common detection signal via a logic circuit arrangement (L) which makes a decision on the majority.
dadurch gekennzeichnet , daß als Strahlungsquelle eine Leuchtdiode (LED) und als Empfänger ein Fototransistor (FT) angeordnet ist.3. Device according to one of claims 1 or 2,
characterized in that a light emitting diode (LED) is arranged as the radiation source and a phototransistor (FT) is arranged as the receiver.
dadurch gekennzeichnet, daß
die Abtastanordnung (LEO,FT) am Schreibkopf (TS) angeordnet ist.5. Device according to one of claims 1 to 4,
characterized in that
the scanning arrangement (LEO, FT) is arranged on the write head (TS).
dadurch gekennze ichnet, daß eine
die Ausgangssignale der Abtastanordnung je Basiswegstrekke (B) ODER-verknüpfende Selbsthalteschaltung aus z.B. einem Schwellwertschalter (3C) angeordnet ist.6. Device according to one of claims 1 to 5,
characterized by the fact that a
the output signals of the scanning arrangement per base path (B) OR-latching circuit from, for example, a threshold switch (3C) is arranged.
gekennzeichnet , durch eine Strahlungsquelle aus einer pulsweise über einen elektrischen Schalter (T1) angesteuerten Leuchtdiode (LED) einem nachgeschalteten Empfänger aus einem Fototransistor (FT) einem mit dem Empfänger kapazitiv (C1) gekoppelten, die Schalt- schwelle für den Schwellwertschalter (IC) bestimmenden Spannungsteiler (R4.R5) und einem nachgeschalteten Schwellwertschalter (IC) dessen Ausgang (ICA) über eine Diode (D2) auf seinen Eingang (ICE) rückgekoppelt ist.7. Device according to one of claims 1 to 6,
characterized by a radiation source consisting of a light-emitting diode (LED) controlled in pulses via an electrical switch (T1), a downstream receiver made of a phototransistor (FT) and a capacitive (C1) coupled to the receiver, which determine the switching threshold for the threshold value switch (IC) Voltage divider (R4.R5) and a downstream threshold switch (IC) whose output (ICA) is fed back to its input (ICE) via a diode (D2).
dadurch gekennzeichnet, daß die Leuchtdiode (LED) im Überstrombereich betrieben wird.8. Device according to one of claims 1 to 7,
characterized in that the light-emitting diode (LED) is operated in the overcurrent range.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2951934 | 1979-12-21 | ||
| DE2951934A DE2951934C2 (en) | 1979-12-21 | 1979-12-21 | Device for typewriters or the like. for determining the lateral edges of the recording medium |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0031137A2 true EP0031137A2 (en) | 1981-07-01 |
| EP0031137A3 EP0031137A3 (en) | 1983-01-19 |
| EP0031137B1 EP0031137B1 (en) | 1985-03-27 |
Family
ID=6089367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP80107990A Expired EP0031137B1 (en) | 1979-12-21 | 1980-12-17 | Device for determining the side margins of record sheets in typewriters or the like |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0031137B1 (en) |
| JP (1) | JPS6017713B2 (en) |
| AU (1) | AU521133B2 (en) |
| BR (1) | BR8008359A (en) |
| CA (1) | CA1166758A (en) |
| DE (1) | DE2951934C2 (en) |
| DK (1) | DK545180A (en) |
| MX (1) | MX148582A (en) |
| ZA (1) | ZA807965B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3930916A1 (en) * | 1988-09-15 | 1990-03-22 | Brother Ind Ltd | LEAF DETECTION DEVICE |
| EP0539857A1 (en) * | 1991-10-29 | 1993-05-05 | Oki Electric Industry Co., Ltd. | Print paper detecting circuits |
| US5323944A (en) * | 1990-02-02 | 1994-06-28 | Siemens Nixdorf Informationssysteme Ag | Arrangement for the lateral positioning of a recording medium in a printer or photocopier |
| US5359181A (en) * | 1990-02-02 | 1994-10-25 | Siemens Informationssysteme Aktiengesellschaft | Device for transporting recording media in printers or photocopiers |
| EP0763784A2 (en) * | 1995-09-13 | 1997-03-19 | Seiko Epson Corporation | Method for detecting an end portion of a recording paper in a recording apparatus and end portion detection apparatus |
| US6079892A (en) * | 1995-09-13 | 2000-06-27 | Seiko Epson Corporation | Method for detecting an end portion of a recording medium in a recording apparatus and end portion detection apparatus |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3345030C1 (en) * | 1983-12-13 | 1984-10-11 | Siemens AG, 1000 Berlin und 8000 München | Scanning device for recognizing the recording medium in printing devices |
| DE3731538C1 (en) * | 1987-09-18 | 1988-12-22 | Siemens Ag | Monitoring device for record carriers in printing devices |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3769628A (en) * | 1972-04-03 | 1973-10-30 | Varian Associates | Method and apparatus for electrostatically recording with a closed loop web drive |
| FR2280576A1 (en) * | 1974-07-31 | 1976-02-27 | Bunker Ramo | DOCUMENT PLACEMENT DEVICE |
| FR2409155A1 (en) * | 1977-11-22 | 1979-06-15 | Wordplex Ltd A E S | IMPROVEMENTS MADE TO PRINTING DEVICES |
-
1979
- 1979-12-21 DE DE2951934A patent/DE2951934C2/en not_active Expired
-
1980
- 1980-12-15 MX MX185232A patent/MX148582A/en unknown
- 1980-12-17 EP EP80107990A patent/EP0031137B1/en not_active Expired
- 1980-12-19 ZA ZA00807965A patent/ZA807965B/en unknown
- 1980-12-19 JP JP55181183A patent/JPS6017713B2/en not_active Expired
- 1980-12-19 DK DK545180A patent/DK545180A/en not_active Application Discontinuation
- 1980-12-19 BR BR8008359A patent/BR8008359A/en unknown
- 1980-12-19 CA CA000367166A patent/CA1166758A/en not_active Expired
- 1980-12-19 AU AU65563/80A patent/AU521133B2/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3769628A (en) * | 1972-04-03 | 1973-10-30 | Varian Associates | Method and apparatus for electrostatically recording with a closed loop web drive |
| FR2280576A1 (en) * | 1974-07-31 | 1976-02-27 | Bunker Ramo | DOCUMENT PLACEMENT DEVICE |
| FR2409155A1 (en) * | 1977-11-22 | 1979-06-15 | Wordplex Ltd A E S | IMPROVEMENTS MADE TO PRINTING DEVICES |
Non-Patent Citations (1)
| Title |
|---|
| IBM TECHNICAL DISCLOSURE BULLETIN, Band 20, Nr. 10, M{rz 1978, Seiten 3996-3997; * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3930916A1 (en) * | 1988-09-15 | 1990-03-22 | Brother Ind Ltd | LEAF DETECTION DEVICE |
| US5323944A (en) * | 1990-02-02 | 1994-06-28 | Siemens Nixdorf Informationssysteme Ag | Arrangement for the lateral positioning of a recording medium in a printer or photocopier |
| US5359181A (en) * | 1990-02-02 | 1994-10-25 | Siemens Informationssysteme Aktiengesellschaft | Device for transporting recording media in printers or photocopiers |
| EP0539857A1 (en) * | 1991-10-29 | 1993-05-05 | Oki Electric Industry Co., Ltd. | Print paper detecting circuits |
| EP0763784A2 (en) * | 1995-09-13 | 1997-03-19 | Seiko Epson Corporation | Method for detecting an end portion of a recording paper in a recording apparatus and end portion detection apparatus |
| EP0763784A3 (en) * | 1995-09-13 | 1997-06-04 | Seiko Epson Corp | Method for detecting an end portion of a recording paper in a recording apparatus and end portion detection apparatus |
| US6079892A (en) * | 1995-09-13 | 2000-06-27 | Seiko Epson Corporation | Method for detecting an end portion of a recording medium in a recording apparatus and end portion detection apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5699689A (en) | 1981-08-11 |
| CA1166758A (en) | 1984-05-01 |
| EP0031137B1 (en) | 1985-03-27 |
| AU6556380A (en) | 1981-06-25 |
| BR8008359A (en) | 1981-07-07 |
| DK545180A (en) | 1981-06-22 |
| DE2951934C2 (en) | 1982-08-19 |
| MX148582A (en) | 1983-05-11 |
| EP0031137A3 (en) | 1983-01-19 |
| DE2951934A1 (en) | 1981-07-02 |
| ZA807965B (en) | 1982-01-27 |
| JPS6017713B2 (en) | 1985-05-04 |
| AU521133B2 (en) | 1982-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69426131T2 (en) | Vibrating frame printer and operating procedures | |
| EP1067053B1 (en) | Device for detecting an object | |
| EP0092061A2 (en) | Combined optical manual reading device for the machine recognition of marks with an integrated optical system | |
| DE1216589B (en) | Arrangement for the machine recognition of characters | |
| CH632099A5 (en) | FAST PRINTER. | |
| EP0031137B1 (en) | Device for determining the side margins of record sheets in typewriters or the like | |
| DE2850632A1 (en) | PRINTING DEVICE | |
| EP0650911A1 (en) | Apparatus and method for detection of overlapping flexible and flat objects | |
| DE1951713C3 (en) | System for reading markings | |
| DE2459358A1 (en) | DEVICE FOR DETECTING A REFLECTIVE SUBSTANCE ON A SUPPORT BODY | |
| DE3424412C2 (en) | ||
| DE2826566C2 (en) | Process for printing and feeding receipts to a printer | |
| EP0432289B1 (en) | Optical sensor for reflective and non-reflective materials | |
| EP0690792B1 (en) | Device for precisely positioning a printing head in relation to a substrate | |
| DE60030072T2 (en) | Recording apparatus with a detector unit and ink cartridge in a recording apparatus | |
| DE3345030C1 (en) | Scanning device for recognizing the recording medium in printing devices | |
| DE3331982C2 (en) | Device for printing devices for the automatic, list-wise separation of folding paper | |
| DE2113187C3 (en) | High speed multi-strip recorder | |
| DE3731538C1 (en) | Monitoring device for record carriers in printing devices | |
| DE4309185C2 (en) | Device for exact positioning of a print head in relation to a record carrier | |
| DE19849525B4 (en) | Ribbon positioning system | |
| DE3404883C2 (en) | Form holding device | |
| DD204444A1 (en) | DETECTION DEVICE FOR ELECTRONIC WRITING OR BUEROOM MACHINES | |
| DE102008011652A1 (en) | Ink cartridge has frame, which limits ink chamber, and section, which is illuminated with light, where wall forms part of outer circumference of frame | |
| DE3310201A1 (en) | Circuit arrangement for optical hand-held readers for detecting the bar-code edges of a bar code to be scanned |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): CH FR GB IT NL SE |
|
| 17P | Request for examination filed |
Effective date: 19810515 |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Designated state(s): CH FR GB IT LI NL SE |
|
| ITF | It: translation for a ep patent filed | ||
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Designated state(s): CH FR GB IT LI NL SE |
|
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19891231 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19901116 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19901212 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19901219 Year of fee payment: 11 |
|
| ITTA | It: last paid annual fee | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19910322 Year of fee payment: 11 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19910701 |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19911217 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19911218 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19911231 Ref country code: CH Effective date: 19911231 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19920831 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
| EUG | Se: european patent has lapsed |
Ref document number: 80107990.6 Effective date: 19920704 |