EP0031137A2 - Dispositif pour déterminer les marges latérales des feuilles d'enregistrement dans les machines à écrire ou analogues - Google Patents

Dispositif pour déterminer les marges latérales des feuilles d'enregistrement dans les machines à écrire ou analogues Download PDF

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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
Application number
EP80107990A
Other languages
German (de)
English (en)
Other versions
EP0031137A3 (en
EP0031137B1 (fr
Inventor
Bernhard Dipl.-Ing. Thurz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0031137A2 publication Critical patent/EP0031137A2/fr
Publication of EP0031137A3 publication Critical patent/EP0031137A3/de
Application granted granted Critical
Publication of EP0031137B1 publication Critical patent/EP0031137B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • 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)
  • Length Measuring Devices By Optical Means (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
EP80107990A 1979-12-21 1980-12-17 Dispositif pour déterminer les marges latérales des feuilles d'enregistrement dans les machines à écrire ou analogues Expired EP0031137B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2951934 1979-12-21
DE2951934A DE2951934C2 (de) 1979-12-21 1979-12-21 Vorrichtung für Schreibmaschinen o.dgl. zum Bestimmen der seitlichen Ränder des Aufzeichnungsträgers

Publications (3)

Publication Number Publication Date
EP0031137A2 true EP0031137A2 (fr) 1981-07-01
EP0031137A3 EP0031137A3 (en) 1983-01-19
EP0031137B1 EP0031137B1 (fr) 1985-03-27

Family

ID=6089367

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107990A Expired EP0031137B1 (fr) 1979-12-21 1980-12-17 Dispositif pour déterminer les marges latérales des feuilles d'enregistrement dans les machines à écrire ou analogues

Country Status (9)

Country Link
EP (1) EP0031137B1 (fr)
JP (1) JPS6017713B2 (fr)
AU (1) AU521133B2 (fr)
BR (1) BR8008359A (fr)
CA (1) CA1166758A (fr)
DE (1) DE2951934C2 (fr)
DK (1) DK545180A (fr)
MX (1) MX148582A (fr)
ZA (1) ZA807965B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3930916A1 (de) * 1988-09-15 1990-03-22 Brother Ind Ltd Blatterfassungsvorrichtung
EP0539857A1 (fr) * 1991-10-29 1993-05-05 Oki Electric Industry Co., Ltd. Circuits de détection du papier d'impression
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 (fr) * 1995-09-13 1997-03-19 Seiko Epson Corporation Procédé de détection de partie terminale d'un papier d'enregistrement dans un appareil d'enregistrement et appareil de détection pour une partie terminale
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3345030C1 (de) * 1983-12-13 1984-10-11 Siemens AG, 1000 Berlin und 8000 München Abtasteinrichtung zum Erkennen des Aufzeichnungsträgers in Druckeinrichtungen
DE3731538C1 (de) * 1987-09-18 1988-12-22 Siemens Ag UEberwachungsvorrichtung fuer Aufzeichnungstraeger in Druckeinrichtungen

Citations (3)

* Cited by examiner, † Cited by third party
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 (fr) * 1974-07-31 1976-02-27 Bunker Ramo Dispositif de mise en place de document
FR2409155A1 (fr) * 1977-11-22 1979-06-15 Wordplex Ltd A E S Perfectionnements apportes a des dispositifs d'impression

Patent Citations (3)

* Cited by examiner, † Cited by third party
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 (fr) * 1974-07-31 1976-02-27 Bunker Ramo Dispositif de mise en place de document
FR2409155A1 (fr) * 1977-11-22 1979-06-15 Wordplex Ltd A E S Perfectionnements apportes a des dispositifs d'impression

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, Band 20, Nr. 10, M{rz 1978, Seiten 3996-3997; *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3930916A1 (de) * 1988-09-15 1990-03-22 Brother Ind Ltd Blatterfassungsvorrichtung
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 (fr) * 1991-10-29 1993-05-05 Oki Electric Industry Co., Ltd. Circuits de détection du papier d'impression
EP0763784A2 (fr) * 1995-09-13 1997-03-19 Seiko Epson Corporation Procédé de détection de partie terminale d'un papier d'enregistrement dans un appareil d'enregistrement et appareil de détection pour une partie terminale
EP0763784A3 (fr) * 1995-09-13 1997-06-04 Seiko Epson Corp Procédé de détection de partie terminale d'un papier d'enregistrement dans un appareil d'enregistrement et appareil de détection pour une partie terminale
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
AU521133B2 (en) 1982-03-18
DE2951934A1 (de) 1981-07-02
EP0031137A3 (en) 1983-01-19
AU6556380A (en) 1981-06-25
CA1166758A (fr) 1984-05-01
ZA807965B (en) 1982-01-27
DE2951934C2 (de) 1982-08-19
JPS6017713B2 (ja) 1985-05-04
DK545180A (da) 1981-06-22
BR8008359A (pt) 1981-07-07
JPS5699689A (en) 1981-08-11
MX148582A (es) 1983-05-11
EP0031137B1 (fr) 1985-03-27

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