EP0077900A2 - Dispositif enregistreur de données sur un support - Google Patents

Dispositif enregistreur de données sur un support Download PDF

Info

Publication number
EP0077900A2
EP0077900A2 EP82107876A EP82107876A EP0077900A2 EP 0077900 A2 EP0077900 A2 EP 0077900A2 EP 82107876 A EP82107876 A EP 82107876A EP 82107876 A EP82107876 A EP 82107876A EP 0077900 A2 EP0077900 A2 EP 0077900A2
Authority
EP
European Patent Office
Prior art keywords
electrodes
writing
control circuit
contact surfaces
comb
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
EP82107876A
Other languages
German (de)
English (en)
Other versions
EP0077900A3 (en
EP0077900B1 (fr
Inventor
Hermann Dipl.-Ing. Künst
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.)
Ingenieurbuero Dipl-Ing Hermann Kuenst
Technomed Elektromed Apparatebau GmbH
Original Assignee
Ingenieurbuero Dipl-Ing Hermann Kuenst
Technomed Elektromed Apparatebau GmbH
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 Ingenieurbuero Dipl-Ing Hermann Kuenst, Technomed Elektromed Apparatebau GmbH filed Critical Ingenieurbuero Dipl-Ing Hermann Kuenst
Publication of EP0077900A2 publication Critical patent/EP0077900A2/fr
Publication of EP0077900A3 publication Critical patent/EP0077900A3/de
Application granted granted Critical
Publication of EP0077900B1 publication Critical patent/EP0077900B1/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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/385—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material
    • B41J2/39—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material using multi-stylus heads
    • B41J2/395—Structure of multi-stylus heads

Definitions

  • the invention relates to a device for recording information on a record carrier according to the preamble of the main claim.
  • One end of the adjacent wire electrodes are pressed between two opposite plates and thus form the write head.
  • the other ends of the write electrodes of the film are divided into several groups for connection to a drive circuit.
  • the electrodes of each group are connected to a circuit card.
  • the circuit cards with the respective wire sections are rotated and bent so that they can be inserted into a control circuit. With this type of contact, the electrodes themselves can be damaged by twisting and bending the groups of electrodes. In addition, a larger space is required to accommodate the circuit cards.
  • a method for producing a write head in which the electrode wire is placed on an insulating plate at a defined distance.
  • the insulating material plate has staggered outward connecting wires which are contacted by spot welding, resistance, laser beam or electron beam welding with the electrode wire at mutually offset locations.
  • the arrangement is cast in casting resin, the ends of the electrode wire protruding from the molded insulating body and the connecting wires approximately protrude perpendicularly to the axis of the writing electrodes as connector pins from the molded insulating body.
  • a write head produced according to this method has the disadvantage that a defined distance between the electrodes is necessary so that the contact of only one electrode wire with the respective connecting wire is ensured.
  • the distance between the electrodes depends on the width of the connector pins. In this known arrangement, it is therefore not possible to make the distance between the writing electrodes as narrow as possible.
  • the object of the invention is therefore to provide a device for recording information on a record carrier in a compact design, in which to increase the resolution, the distance between the electrodes of the writing comb can be reduced to the thickness of their insulation, regardless of the contacting, and in which any number of electrodes can be arranged side by side without the space requirement is increased significantly due to the contact.
  • the grid-shaped contact field during contacting functional dimensions, that is, the width of the writing comb, not changed.
  • any closely arranged writing electrodes and any number of writing electrodes arranged side by side can be contacted.
  • the dimensions of the contact surfaces forming the grid-shaped contact field are not dependent on the thickness of an electrode or the distance between the electrodes, since they can extend over a plurality of electrodes. The manufacturing process for the contact surfaces is therefore based on wide tolerances.
  • control circuit in a plane above the write comb achieves a compact design, the contact surfaces of the write comb being connected to the control circuit via releasable contacts, for example contact springs.
  • This compact structure can be further reduced if the drive circuit, which is preferably built in integrated or hybrid technology, is connected to the write comb via fixed contacts, so that a very small, coherent unit of write comb drive circuit results.
  • the resilient arrangement of the electrodes in the direction of the recording medium enables adaptation to unevenness in the recording medium and adaptation to the erosion of the electrodes.
  • a constant accuracy of the recording is achieved by fixing the electrodes across the recording medium with the help of the highly flexible tape.
  • the current By supplying current via electrodes which are located on the actual write head and are mechanically identical to the write electrodes, the current can be applied to the recording medium over a large area, so that the current supply electrodes do not mark on the recording medium.
  • the power supply electrodes are subject to wear similar to that of the writing electrodes and can be replaced at the same time.
  • the design of the electrodes as a coaxial conductor, in which the inner conductor forms the writing electrode and the power is supplied via the outer conductor, ensures an exact limitation of the writing point and the interference radiation generated by the writing spark is fully shielded.
  • Controlling the electrodes by constant current which limits the electrode current to a fixed value, increases the life of the electrodes.
  • the entire control circuit is protected against incorrect operation.
  • the writing comb can also be used for a thermal writing head. It is advantageous that all writing points are movable and can compensate for unevenness.
  • FIG. 1 shows a writing comb 1 as used for a device for recording information.
  • a large number of insulated wires 3 lying next to one another are fastened on a film 2, which can be designed, for example, as a Pertinax film, with the aid of an adhesive.
  • a wire-foil arrangement can be produced with the aid of a winding device.
  • a winding drum is used, which carries the film 2 provided with the adhesive.
  • the insulated wire is continuously wound onto the film 2 by a rotating roller via a wire guide device which moves parallel to the axis of the winding drum during the winding process, a wire cylinder being formed.
  • This wire cylinder is then cut open and processed into a writing comb 1 corresponding to FIG. 1.
  • the adjacent wires 3 form the electrodes 4.
  • a grid-shaped contact field is provided on the electrodes 4, which is formed by a multiplicity of contact surfaces 5.
  • Fig. 2 shows the arrangement of the grid-shaped contact field.
  • Lines 6 lying parallel to the electrodes 4 and somewhat obliquely are transverse to the electrodes the elongated electrodes 4 are provided with parallel columns 7.
  • the contact areas 5 are formed at the crossing points of the row and column lines.
  • the contact field thus has a multiplicity of parallel contact surface lines arranged transversely to the writing electrodes 4, the contact surfaces 5 of a contact surface line being somewhat offset from the contact surfaces of the previous line.
  • contact surfaces 5 and electrodes 4 The contacting between contact surfaces 5 and electrodes 4 is shown with reference to FIG. 3. Each contact area 5 extends over several electrodes 4, of which only one electrode 8 is stripped. When stripping, the insulation of the very close-lying cable must not be damaged. Therefore, the wire 3 for the electrodes 4 is stripped in the winding process described above at the points at which the electrodes 4 are to be conductively connected to the contact surfaces 5.
  • the stripping process is controlled by a computer.
  • the contact surfaces 5 consist for example of conductive silver or conductive adhesive . They are applied, for example, by screen printing, galvanic or electroless metal deposition or vacuum evaporation.
  • the electrodes 4 protrude beyond the film 2 (FIG. 1).
  • the electrodes 4 are kinked in their writing area 10, so that they are approximately perpendicular to the one not shown during the writing process Support the record carrier.
  • the direction of movement of the record carrier is indicated by arrow 11.
  • the electrodes 4 are fixed transversely to the recording medium with a highly flexible but low-stretch tape 12, for example with a thermoplastic layer. As a result, the electrodes 4 cannot move laterally, so that a constant accuracy of the recording is achieved.
  • the electrodes 4 are individually movable and resilient in the direction of the recording medium. This enables them to adapt to unevenness in the record carrier and to possible burn-off.
  • the electrodes 4 are provided with a wear coating.
  • a register paper with a metallic surface is provided as the recording medium.
  • a current is supplied to the metallic surface of the paper via current supply electrodes and is removed via these electrodes in accordance with the control of the individual electrodes.
  • the current flow creates a burnout on the metallic surface. So that burnout occurs due to the point contact of the writing electrode with the metallic surface due to current flow, the current must be supplied to the electrically conductive surface as far as possible.
  • the power supply takes place at a writing comb 1 according to FIG. 1 via current supply electrodes 13 which are arranged to the left and right of the writing electrodes 4.
  • the power supply electrodes 13 are mechanically identical to the writing electrodes 4 and, like these, rest on the metallic surface of the recording paper.
  • the power supply electrodes 13 are connected to the left and right of the write electrodes 4 via a contact point 14.
  • the write comb 1 shows the write comb 1 in connection with a control circuit 20 in section.
  • the control circuit 20, which is designed as a printed circuit, lies in one plane above the writing comb.
  • An insulation plate 21, which has holes 22, is arranged between the control circuit 20 and the comb 1.
  • the control takes place via a transistor matrix, which is indicated by the schematically illustrated transistors 23.
  • a transistor 23 is assigned to each write electrode 4.
  • the electrical connection between the transistors and the respective writing electrodes 4 takes place via contact springs 24, which are arranged between the contact surfaces 5 and the connections of the transistors 23 under voltage in the holes 22 of the insulating plate 21.
  • the underside of the comb 1 is provided with a metallic plate 25 to shield the interference radiation caused by the write spark. Accordingly, a metallic plate 26, which is arranged above the writing area, serves to shield and to limit and protect the deflection of the electrodes.
  • the writing comb 1 is firmly connected via the contact points 5 to the control circuit 20, which is located in a plane above the writing comb. Electronic components are indicated at 27.
  • the control circuit 20 would then also have to be replaced.
  • the type of connection is particularly suitable for control circuits 20 which are constructed using integrated or hybrid technology, since this results in a very small and coherent unit of write-control control circuit. For example, such an arrangement could be cast as a unit.
  • the current is supplied or discharged via the current supply electrodes 13 which are located laterally to the writing electrodes 4.
  • the write electrodes 4 and the write feed electrodes 13 can be arranged alternately next to one another.
  • the electrical connection of all current supply electrodes can take place via contact strips which lie transversely to the electrodes 4, 13 and in whose areas only the current supply electrodes 13 are stripped.
  • Another possibility for supplying current is an arrangement in which the supply electrodes 13 are in front of the writing electrodes 4 in the writing direction.
  • the current supply electrodes 13 can be arranged on the film 2 below the writing electrodes 4.
  • a further possibility for supplying current is that the electrodes, which do not currently act as write electrodes, are always switched as the supply electrodes via the control circuit 20.
  • This arrangement can be varied in such a way that, depending on the frequency of driving the write electrodes, only certain write electrodes are switched as current supply electrodes.
  • the electrodes consist of a conductive electrode core which is surrounded by insulation. But it is also conceivable that the electrodes are designed as coaxial electrodes.
  • the power supply can take place via the electrically conductive outer jacket of all electrodes of a writing comb. With this arrangement, the interference radiation generated by the write spark is perfectly shielded.
  • the contacting of the inner cores of the coaxial electrode serving as writing electrodes with the contact surfaces 5 is carried out in accordance with the exemplary embodiment according to FIG. 1. However, before contacting the respective outer jacket can be removed.
  • the coaxial electrode 30 has a conductive outer jacket 31, an insulation layer 32 and a conductive core 33.
  • a resistance element 34 is located at the end of the electrode 30.
  • the resistance element 34 is provided with an abrasion-resistant protective layer 35. When current is passed, the resistance element 34 is heated and forms a writing point on the recording medium, which is designed as heat-sensitive paper.
  • the arrangement of the electrodes and their contacting corresponds to a writing comb from FIG. 1.
  • the control of the writing electrodes 4 is carried out by constant current, that is, the electrode current is limited to a fixed value. This measure avoids the high inrush current, for example.
  • the type of contacting corresponding to the grid-shaped contact field is seen in the exemplary embodiments described only in connection with a writing comb 1 of a device for recording information.
  • this type of contact can be made to any type of information lying in parallel lines are transmitted, a connector unit or a detachable plug connection is not provided in a line but on a surface.

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  • Electronic Switches (AREA)
EP82107876A 1981-10-28 1982-08-27 Dispositif enregistreur de données sur un support Expired EP0077900B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3143135A DE3143135C2 (de) 1981-10-28 1981-10-28 Vielfachelektroden-Schreibkopf zum Aufzeichnen von Informationen auf einen Aufzeichnungsträger und Verfahren zur Herstellung eines Schreibkammes
DE3143135 1981-10-28

Publications (3)

Publication Number Publication Date
EP0077900A2 true EP0077900A2 (fr) 1983-05-04
EP0077900A3 EP0077900A3 (en) 1984-04-04
EP0077900B1 EP0077900B1 (fr) 1986-05-28

Family

ID=6145241

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107876A Expired EP0077900B1 (fr) 1981-10-28 1982-08-27 Dispositif enregistreur de données sur un support

Country Status (3)

Country Link
US (1) US4502062A (fr)
EP (1) EP0077900B1 (fr)
DE (1) DE3143135C2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5237347A (en) * 1987-01-09 1993-08-17 Fuji Xerox Co., Ltd. Latent electrostatic image optical writing apparatus
DE19537161C1 (de) * 1995-10-06 1996-12-19 Francotyp Postalia Gmbh Anordnung zur Überwachung der Funktion eines Tintendruckkopfes
JP3826013B2 (ja) * 2001-02-28 2006-09-27 キヤノン株式会社 画像形成装置
JP5284488B2 (ja) * 2009-12-10 2013-09-11 キヤノン株式会社 記録ヘッドおよびその製造方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1362844A (en) * 1970-07-29 1974-08-07 Varian Associates Method of making an electrostatic wire stylus recording head and lead wires therefor
DE2126043A1 (de) * 1971-05-26 1972-11-30 Bosch Gmbh Robert Verfahren zur Herstellung eines Schreibkopfes für eine Vorrichtung zum Aufzeichnen von Informationen auf einen Aufzeichnungsträger
US3718936A (en) * 1971-06-16 1973-02-27 American Express Invest Electrostatic matrix head construction
BE788880A (fr) * 1971-10-06 1973-03-15 Xerox Corp Perfectionnements aux stylets pour telecopieurs
DE2314506B2 (de) * 1973-03-23 1980-02-28 Philips Patentverwaltung Gmbh, 2000 Hamburg Schreibeinrichtung fur elektrosensitive Aufzeichnungsträger
FR2394399A1 (fr) * 1977-06-13 1979-01-12 Cit Alcatel Barrette d'impression d'une image
US4189736A (en) * 1977-08-29 1980-02-19 Exxon Research & Engineering Co. Facsimile stylus assembly
FR2456626A1 (fr) * 1979-05-14 1980-12-12 Jaouannet Alain Tete d'impression pour imprimante electrostatique par points a tete fixe
GB2100196B (en) * 1981-04-15 1986-03-12 Tokyo Shibaura Electric Co Electrostatic recording head a method for manufacturing the same and an apparatus for practising this method
US4399447A (en) * 1981-05-04 1983-08-16 Honeywell Information Systems Inc. Wear resistant electrode head for electrographic printers

Also Published As

Publication number Publication date
EP0077900A3 (en) 1984-04-04
DE3143135A1 (de) 1983-05-26
EP0077900B1 (fr) 1986-05-28
US4502062A (en) 1985-02-26
DE3143135C2 (de) 1984-04-05

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