EP0178342B1 - Dispositif pour imprimante matricielle, en particulier une imprimante matricielle ligne par ligne - Google Patents

Dispositif pour imprimante matricielle, en particulier une imprimante matricielle ligne par ligne Download PDF

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Publication number
EP0178342B1
EP0178342B1 EP84112548A EP84112548A EP0178342B1 EP 0178342 B1 EP0178342 B1 EP 0178342B1 EP 84112548 A EP84112548 A EP 84112548A EP 84112548 A EP84112548 A EP 84112548A EP 0178342 B1 EP0178342 B1 EP 0178342B1
Authority
EP
European Patent Office
Prior art keywords
sheets
colour ribbon
ribbon
printing elements
printing
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.)
Expired
Application number
EP84112548A
Other languages
German (de)
English (en)
Other versions
EP0178342A1 (fr
Inventor
Josef Pichler
Karl Puchegger
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.)
Mannesmann Tally GmbH Austria
Original Assignee
Mannesmann Tally GmbH Austria
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 Mannesmann Tally GmbH Austria filed Critical Mannesmann Tally GmbH Austria
Priority to AT84112548T priority Critical patent/ATE41363T1/de
Priority to DE8484112548T priority patent/DE3477163D1/de
Priority to EP84112548A priority patent/EP0178342B1/fr
Publication of EP0178342A1 publication Critical patent/EP0178342A1/fr
Application granted granted Critical
Publication of EP0178342B1 publication Critical patent/EP0178342B1/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
    • B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
    • B41J35/26—Ink-ribbon shields or backings

Definitions

  • the invention relates to a device for matrix printers, in particular for matrix line printers, which have a printing element carrier opposite a writing abutment, the recording medium resting on the writing abutment and a continuously or step-by-step ribbon being guided between the printing elements and the recording medium, to which a ribbon protection is assigned, which on the one hand, lies between the ink ribbon and the recording medium and has passage openings for the printing elements at the locations of the printing elements.
  • Such so-called impact printers require certain prerequisites in order to achieve a clean font, to maintain an acceptable volume during operation and to keep possible sources of wear as low as possible.
  • Such pressure elements consist of needles or hammers, each with a pressure tip, such as. B. are provided with a small ball.
  • the device mentioned at the outset is known from GB-A-2135 634.
  • the ribbon is largely on the printing elements.
  • the ribbon protection consists of a rail covering the ribbon on one side. This rail is removable and placed on the position determining pins.
  • the ribbon still rubs under the rail on the document to be written, which takes place under the conditions to be assumed with high coefficients of friction.
  • Another disadvantage is therefore the grinding with friction of the ink ribbon on the surface of the body carrying the pressure elements, with long needle or hammer banks posing particular problems.
  • the printing element carrier and the ink ribbon move in the longitudinal direction relative to one another, which also increases the friction.
  • the invention is therefore based on the object of providing such a guidance of the ink ribbon which prevents disadvantageous grinding of the ink ribbon on the recording medium and / or the opposite surface.
  • the object is achieved according to the invention in that the ribbon runs between two foils covering the ribbon broad sides and serving as ribbon protection on both sides, that concentric passage openings for the printing elements are provided at the locations of the printing elements in both foils, and that one of the ribbons for easier insertion of the ribbon both films have a smaller width over the full length than the other film.
  • the printing elements only press the ribbon onto the recording medium through the passage openings.
  • ribbon lubrication is absolutely prevented.
  • the ink ribbon slides particularly easily between the foils, so that the friction on the printing element carrier is eliminated and advantageously the ink ribbon is prevented from being carried along by the recording medium (paper fait). At the same time, wear on the recording medium is also reduced.
  • the foils are easy to manufacture and easily exchangeable by the user. According to a further feature of the invention it is provided that the thickness of the two foils together is less than the stroke of the respective pressure element.
  • connection located at the foot of the two films consists of an adhesive connection and a magnetic film.
  • a magnetic film also stiffens the two films and further facilitates the handling of the mask formed from the two films.
  • connection located at the foot of the two foils is provided with longitudinally spaced cutouts which, in the operating position, engage in positioning projections which are provided on the pressure element carrier.
  • the matrix line printer has a printing element carrier 1, which is opposite the writing abutment 2, which consists of a platen roller 2a. Between the printing element carrier 1 and the writing abutment 2, the writing gap 3 is formed by a suitable distance, in which the recording medium 4 and the ink ribbon 5 are guided.
  • the record carrier 4 normally lies snugly on the platen 2a on the ink ribbon 5 moves contact-free between the printing element carrier 1 and the record carrier 4 perpendicular to the drawing plane (FIG. 1).
  • the pressure element carrier 1 swings perpendicular to the plane of the drawing over the area of at least one character width and is therefore mounted on short longitudinal guides 6.
  • the pressure elements 7 here consist of pressure needles.
  • the ink ribbon 5 lies between a film 8 and a film 9.
  • the film 8 leans against the printing element carrier 1 and is moved back and forth with it.
  • the pressure elements 7 are also moved back and forth with the pressure element carrier 1.
  • the films 8 and 9 each have passage openings 10 at the locations of the printing elements 7.
  • the printing elements 7 therefore penetrate the film 8, hit the ink ribbon 5 and press it through the passage opening 10 onto the recording medium 4. This process is illustrated in FIG. 3 more clear.
  • the tip 7a of the needle-shaped pressure element 7 is significantly smaller in diameter than the diameter of the passage opening 10.
  • the ink ribbon 5 therefore has enough space to be pressed through the passage openings 10 in the film 9 onto the recording medium 4.
  • the thickness 11 of the foils 8 and 9 together is less than the stroke of the pressure element 7.
  • the films 8 and 9 can consist of metal or plastic.
  • Plastic is advantageous because transparent plastics, which are also flexible, are favorable for bending films 8 and 9 apart (as shown in FIG. 1). In addition to the easy insertion of the ink ribbon 5 in the direction 12, viewing the writing gap 3 is also favored.
  • the two foils 8 and 9 are connected to one another at their base 13 (FIG. 4) in the longitudinal direction 14 (FIG. 2).
  • the connection 15 consists of an adhesive connection, a spacer strip 16 and a magnetic film 17 with a soft magnetic strip 18.
  • the mask thus formed consisting of the foils 8 and 9 with the connecting elements, can easily be replaced or used by the user.
  • a plurality of cutouts 19 spaced in the longitudinal direction 14 are provided, which in the operating position engage in positioning projections 20 which are fastened to the pressure element carrier 1.
  • the foils 8 and 9 cannot adhere to one another in such a way that they cannot be separated, even with a larger surface quality.
  • the width of the film 8 is kept larger than that of the film 9 with its width 22.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Dot-Matrix Printers And Others (AREA)

Claims (7)

1. Dispositif pour imprimante matricielle, notamment pour imprimante matricielle de lignes, qui présente un support d'éléments d'impression (1) placé en face d'un support d'écriture (2), en étant précisé que, sur le support d'écriture (2), repose le support d'information (4) et entre les éléments d'impression (7) et le support d'information (4) défile en continu, ou pas à pas, un ruban-encreur (5), qui comporte une protection de ruban (9), qui d'une part se trouve entre le ruban-encreur (5) et le support d'information (4) et présente des ouvertures de passage (10) pour les éléments d'impression (7), caractérisé en ce que le ruban-encreur (5) passe entre deux feuilles (8 et 9) recouvrant les faces du ruban-encreur et servant de protection au ruban-encreur sur ses deux faces et qu'au droit des éléments d'impression (7) se trouvent dans les deux feuilles (8, 9) des ouvertures de passage concentriques (10) pour les éléments d'impression (7), et que pour placer plus facilement le ruban-encreur (5), l'une des deux feuilles (8 ou 9), sur toute la longueur, présente une largeur plus réduite que celle de l'autre feuille.
2. Dispositif selon la revendication 1, caractérisé en ce que l'épaisseur (11) des deux feuilles (8 et 9) considérées ensemble est inférieure à la course de chaque élément d'impression (7).
3. Dispositif selon les revendications 1 et 2, caractérisé en ce que les deux feuilles (8 et 9) sont constituées de matière plastique.
4. Dispositif selon les revendications 1 à 3, caractérisé en ce que les feuilles (8 et 9) sont constituées de matériaux souples transparents.
5. Dispositif selon les revendications 1 à 4, caractérisé en ce que les deux feuilles (8 et 9) sont reliées par leur base (13) dans le sens de la longueur (14).
6. Dispositif selon les revendications 1 à 5, caractérisé en ce que la liaison (15) se trouvant à la base des deux feuilles (8 et 9) est constituée d'un collage et d'une feuille magnétique (17).
7. Dispositif selon les revendications 1 à 6, caractérisé en ce que la liaison (15) se trouvant à la base des deux feuilles (8, 9) est munie d'encoches (19) disposées par intervalles dans le sens de la longueur (14), qui s'emboîtent en position de fonctionnement sur les ergots de positionnement (20), qui sont prévus sur le support d'éléments d'impression (1).
EP84112548A 1984-10-18 1984-10-18 Dispositif pour imprimante matricielle, en particulier une imprimante matricielle ligne par ligne Expired EP0178342B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT84112548T ATE41363T1 (de) 1984-10-18 1984-10-18 Einrichtung fuer matrixdrucker, insbesondere fuer matrixzeilendrucker.
DE8484112548T DE3477163D1 (en) 1984-10-18 1984-10-18 Device for a matrix printer, in particular a matrix line printer
EP84112548A EP0178342B1 (fr) 1984-10-18 1984-10-18 Dispositif pour imprimante matricielle, en particulier une imprimante matricielle ligne par ligne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84112548A EP0178342B1 (fr) 1984-10-18 1984-10-18 Dispositif pour imprimante matricielle, en particulier une imprimante matricielle ligne par ligne

Publications (2)

Publication Number Publication Date
EP0178342A1 EP0178342A1 (fr) 1986-04-23
EP0178342B1 true EP0178342B1 (fr) 1989-03-15

Family

ID=8192225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112548A Expired EP0178342B1 (fr) 1984-10-18 1984-10-18 Dispositif pour imprimante matricielle, en particulier une imprimante matricielle ligne par ligne

Country Status (3)

Country Link
EP (1) EP0178342B1 (fr)
AT (1) ATE41363T1 (fr)
DE (1) DE3477163D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8706189U1 (de) * 1987-04-29 1987-07-02 Siemens Nixdorf Informationssysteme AG, 33106 Paderborn Farbbandkassette für Nadeldrucker mit Farbbandschutzmaske
GB2209501B (en) * 1987-09-05 1991-10-02 Unisys Corp Document printing apparatus
DE3818167A1 (de) * 1988-05-26 1989-11-30 Mannesmann Ag Einrichtung fuer den transport von aufzeichnungstraegern in bueromaschinen, insbesondere fuer beleg in belegverarbeitungsgeraeten

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4285604A (en) * 1979-10-19 1981-08-25 International Business Machines Corporation Ribbon shield for printer
US4483633A (en) * 1983-02-18 1984-11-20 Bell & Howell Company Matrix print head printer

Also Published As

Publication number Publication date
DE3477163D1 (en) 1989-04-20
EP0178342A1 (fr) 1986-04-23
ATE41363T1 (de) 1989-04-15

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