EP0110020A2 - Impression de caractères pour machine à écrire ou machine semblable - Google Patents

Impression de caractères pour machine à écrire ou machine semblable Download PDF

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Publication number
EP0110020A2
EP0110020A2 EP83108455A EP83108455A EP0110020A2 EP 0110020 A2 EP0110020 A2 EP 0110020A2 EP 83108455 A EP83108455 A EP 83108455A EP 83108455 A EP83108455 A EP 83108455A EP 0110020 A2 EP0110020 A2 EP 0110020A2
Authority
EP
European Patent Office
Prior art keywords
winding
print hammer
typewriter
voltage
hammer
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
EP83108455A
Other languages
German (de)
English (en)
Other versions
EP0110020B1 (fr
EP0110020A3 (en
Inventor
Hans Wehking
Manfred Gottschlich
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.)
Olympia AG
Original Assignee
Olympia Werke AG
AEG Olympia 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 Olympia Werke AG, AEG Olympia AG filed Critical Olympia Werke AG
Publication of EP0110020A2 publication Critical patent/EP0110020A2/fr
Publication of EP0110020A3 publication Critical patent/EP0110020A3/de
Application granted granted Critical
Publication of EP0110020B1 publication Critical patent/EP0110020B1/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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/26—Means for operating hammers to effect impression
    • B41J9/38—Electromagnetic means
    • 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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/16—Means for cocking or resetting hammers
    • B41J9/24—Electromagnetic means

Definitions

  • the invention relates to a typewriter or similar machine with a type tee system of the type specified in the preamble of claim 1, in which a print hammer can be actuated electromagnetically.
  • a print hammer is accelerated from its rest position to a tapping position by a short voltage pulse applied to a winding, where a type is imprinted on a recording medium with the interposition of an ink ribbon.
  • the type to be printed is z. B. directly on the print hammer or on a type carrier to be preset before the impression, such as a type plate.
  • the return of the pressure hammer to the rest position then takes place through the reverse kinetic energy when it hits the pressure abutment and is supported by the force of a spring - if a faster return is required for a quicker reinsertion of the pressure hammer.
  • the arrangement of such a spring has a disadvantageous effect on the striking movement because its restoring force must also be overcome.
  • So-called electrodynamic teeing systems such as. B. are known from DE-OS 30 38 881, avoid this disadvantage.
  • permanent magnets generate a magnetic field in which the print hammer is mounted so that it can move in the tapping direction.
  • a winding is provided to which the voltage pulse triggering the discount is applied.
  • the magnetic field generated by the winding which acts counter to the permanent magnets, causes an acceleration of the pressure hammer to the knock-off position and the return movement of the print hammer to the rest position is supported by the magnetic field of the permanent magnets when the voltage pulse in the winding has ended.
  • the invention has for its object to control the print hammer of a tee system of the type mentioned in such a way that the tee movements can follow each other faster.
  • the advantages of the invention consist in particular in that a faster printing unit can be created because the print hammer is moved faster out of the setting range of the type support and thus an immediate setting of the type support to a new type to be printed is possible, and because the print hammer reaches its rest position more quickly and is ready for a new triggering of an impression.
  • the striking system manages with a relatively small striking magnet and a small control voltage.
  • the point in time at which the return current is switched on can be optimally set. As a result, there is no longer any dependency on the distance between the pressure abutment and the print hammer, on the thickness and hardness of the recording medium and on manufacturing and operating tolerances.
  • FIG. 1 shows the electromagnetic tapping system of a typewriter and the associated control device with the details necessary for understanding the invention.
  • the tapping system 1 belongs to the so-called dynamic type, which in addition to a printing hammer 2 has both a winding 3 and a permanent magnet 4, the winding 3 being arranged on the printing hammer 2 which is movably mounted in the magnetic field of the permanent magnet 4 in the tapping direction.
  • a voltage pulse applied to the winding 3 brings about an abrupt acceleration of the print hammer 2 in the direction of the preset print type of a type support 5 formed by a type wheel, as a result of which the character to be imaged is knocked off in a known manner by means of an ink ribbon 6 on a recording medium 7, which is in front of a pressure abutment 8 is arranged.
  • Both the setting of the type carrier 5 to the type to be rejected as well as the application of the voltage pulse to the winding 3 to trigger the type discount is controlled by a control device 9, which is also formed in a known manner by a microcomputer.
  • the control device 9 first of all sends the necessary control signals to a motor control circuit 10, from which the setting motor 11 is controlled until the type to be cut off is set on the type carrier 5 in the cutting position. Thereafter - or even shortly before the end of the setting function - the control device 9 sends a trigger signal for energizing the winding 3 to build up a magnetic field acting in the direction of tapping to an electronic switch 15 which connects a voltage pulse 12 (FIG. 2A) to the winding 3 .
  • the winding 3 is connected to an edge detector 19, from which the voltage jump of the induced voltage upon impact fen of the print hammer 2 is registered in the tee position and converted into an output signal 20, FIG. 2B.
  • the output signal 20 is fed to the control device 9, which then outputs the signal for applying the voltage pulse 16 of opposite polarity to the electronic switch 15.
  • the voltage pulse 16 is thus applied to the winding 3 immediately after the fluctuating influences of the recording medium type and thickness, the roller spacing etc. immediately after the voltage jump occurs in the induced voltage.
  • a voltage is induced which has approximately the course designated by 21.
  • the path of the print hammer 2 is plotted over the time line t in FIG. 2C, the dashed line indicating the time required for returning to the rest position without recirculation.
  • a fade-out circuit or function may have to be provided, of which only voltage jumps after the forward voltage pulse has ended and before the reverse one begins Voltage pulse are allowed for evaluation, so z. B. by switching the voltage pulses generated voltage jumps do not trigger unwanted reverse current.
  • Mechanical or electrical damping measures must also be taken at the rear stop 14 of the pressure hammer 2 to prevent annoying bouncing phenomena.
  • the use of a - e.g. B. shaped by an RC element - contribute voltage pulse with decaying course for the current recirculation.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Impact Printers (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Earth Drilling (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
EP83108455A 1982-12-04 1983-08-27 Impression de caractères pour machine à écrire ou machine semblable Expired EP0110020B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823244936 DE3244936A1 (de) 1982-12-04 1982-12-04 Typenabschlagsystem einer schreib- oder aehnlichen maschine
DE3244936 1982-12-04

Publications (3)

Publication Number Publication Date
EP0110020A2 true EP0110020A2 (fr) 1984-06-13
EP0110020A3 EP0110020A3 (en) 1986-01-08
EP0110020B1 EP0110020B1 (fr) 1989-03-08

Family

ID=6179822

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108455A Expired EP0110020B1 (fr) 1982-12-04 1983-08-27 Impression de caractères pour machine à écrire ou machine semblable

Country Status (4)

Country Link
US (1) US4842429A (fr)
EP (1) EP0110020B1 (fr)
JP (1) JPS59155074A (fr)
DE (2) DE3244936A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1149699A (en) * 1967-04-12 1969-04-23 Ibm Electromagnetic actuator
US3543906A (en) * 1967-08-21 1970-12-01 Edward J Buxton Solenoid controlled printing hammer mechanism
US4192230A (en) * 1977-11-03 1980-03-11 U.S. Philips Corporation Printer, provided with an impact device comprising a transducer
WO1980000552A1 (fr) * 1978-09-01 1980-04-03 Ncr Co Appareillage et procede pour produire un mouvement cyclique
US4273039A (en) * 1979-08-03 1981-06-16 Hewlett Packard Company Impact printing apparatus and method using reluctance switching and a closed loop drive system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172353A (en) * 1963-06-17 1965-03-09 Data Products Corp Variable force hammer high speed printer
US3905294A (en) * 1973-02-16 1975-09-16 Pertec Corp High speed line printing apparatus
DE2939829A1 (de) * 1978-11-09 1980-05-22 Seitz Sa Antriebsvorrichtung fuer ein druckorgan eines schnelldruckers
US4306207A (en) * 1980-05-07 1981-12-15 Hosiden Electronics Co., Ltd. Self-sustaining solenoid
US4347789A (en) * 1980-07-15 1982-09-07 Occidental Oil Shale, Inc. Downhole delay assembly for blasting with series delay
DE3038881A1 (de) * 1980-10-15 1982-05-19 Olympia Werke Ag, 2940 Wilhelmshaven Elektrodynamische anschlagvorrichtung fuer ein druckwerk in schreib- o.ae. bueromaschinen
US4348119A (en) * 1980-11-06 1982-09-07 General Electric Company Bounce control system for moving coil printing element
DE3267952D1 (en) * 1981-03-21 1986-01-30 Vacuumschmelze Gmbh Magnetic drive system for producing linear movements
US4429342A (en) * 1981-04-24 1984-01-31 Siemens Aktiengesellschaft Impact printing device with an improved print hammer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1149699A (en) * 1967-04-12 1969-04-23 Ibm Electromagnetic actuator
US3543906A (en) * 1967-08-21 1970-12-01 Edward J Buxton Solenoid controlled printing hammer mechanism
US4192230A (en) * 1977-11-03 1980-03-11 U.S. Philips Corporation Printer, provided with an impact device comprising a transducer
WO1980000552A1 (fr) * 1978-09-01 1980-04-03 Ncr Co Appareillage et procede pour produire un mouvement cyclique
US4273039A (en) * 1979-08-03 1981-06-16 Hewlett Packard Company Impact printing apparatus and method using reluctance switching and a closed loop drive system

Also Published As

Publication number Publication date
EP0110020B1 (fr) 1989-03-08
DE3244936A1 (de) 1984-06-07
DE3379324D1 (en) 1989-04-13
US4842429A (en) 1989-06-27
EP0110020A3 (en) 1986-01-08
JPS59155074A (ja) 1984-09-04

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