EP0046812B1 - Procédé d'impression comprenant l'utilisation d'un cylindre d'appui pour la bande à caractères d'une imprimante ligne par ligne - Google Patents

Procédé d'impression comprenant l'utilisation d'un cylindre d'appui pour la bande à caractères d'une imprimante ligne par ligne Download PDF

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Publication number
EP0046812B1
EP0046812B1 EP80104963A EP80104963A EP0046812B1 EP 0046812 B1 EP0046812 B1 EP 0046812B1 EP 80104963 A EP80104963 A EP 80104963A EP 80104963 A EP80104963 A EP 80104963A EP 0046812 B1 EP0046812 B1 EP 0046812B1
Authority
EP
European Patent Office
Prior art keywords
support
platen
type belt
roller
print
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
EP80104963A
Other languages
German (de)
English (en)
Other versions
EP0046812A1 (fr
Inventor
Bruno Gantz
Horst D. Matthaei
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.)
IBM Deutschland GmbH
International Business Machines Corp
Original Assignee
IBM Deutschland GmbH
International Business Machines Corp
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 IBM Deutschland GmbH, International Business Machines Corp filed Critical IBM Deutschland GmbH
Priority to EP80104963A priority Critical patent/EP0046812B1/fr
Priority to DE8080104963T priority patent/DE3069706D1/de
Priority to US06/263,622 priority patent/US4377973A/en
Priority to CA000380778A priority patent/CA1161691A/fr
Priority to JP56107167A priority patent/JPS5753362A/ja
Publication of EP0046812A1 publication Critical patent/EP0046812A1/fr
Application granted granted Critical
Publication of EP0046812B1 publication Critical patent/EP0046812B1/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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/02—Platens
    • B41J11/04—Roller platens
    • 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
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/20—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on endless bands or the like

Definitions

  • the invention relates to a printing method using a platen for a circulating, endless type tape of a line printer, which is guided around two rollers and a straight section running parallel to the print line rests on the platen, with a color sheet and a row between the section and the print hammer the paper to be printed is fed through.
  • a bar tape with printing types protruding from one plane is now preferably used as the type carrier.
  • This type tape is supported on the back during the printing process by a bar serving as a pressure abutment.
  • the closure of this bar due to the movement of the steel belt and the force applied by the pressure hammers is considerable.
  • the steel band creates track grooves on the print abutment, particularly for printers with higher printing performance and higher speed of the type band, which reduce the print quality.
  • the invention solves the problem of designing the pressure abutment in such a way that the unavoidable wear is distributed as evenly as possible over the entire enlarged surface in order to significantly increase the service life of the pressure abutment.
  • the advantages achieved by the invention are to be seen essentially in the fact that the technical complexity of an intermediate belt is avoided and, moreover, the surface of the pressure abutment is considerably larger while avoiding its expansion and rotation by using a roller.
  • the wear of the platen according to the invention is thereby kept within such limits that the service life of the platen exceeds the service life of the printer. A replacement of the pressure abutment is thus avoided with certainty by the invention.
  • the print quality of a line printer is improved by the invention, since the air layer located between the type tape and the pressure abutment can escape more quickly due to the roller-shaped design of the pressure abutment and the two wedge-shaped openings resulting therefrom between the type tape and the roller, as a result of which in a print line first struck type creates a character that is not weaker than the following characters of this print line. Due to the roller-shaped design of the pressure abutment, the type band can align itself transversely to its longitudinal extent when the print hammers stop, so that the upper part and lower part of the characters do not have different thicknesses.
  • roller-shaped pressure abutments are known in typewriters and dot matrix printers, these stop rollers serve a different purpose due to the lack of a rotating type belt.
  • the paper 1 to be printed runs through a slot which is formed by a row of printing hammers 2 and the ink sheet 9.
  • Each print hammer 2 is assigned a drive electromagnet 4, the armature 5 of which moves the print hammer 2 against the force of the spring 7 against the paper 1 to be printed, via a push rod 6.
  • the print hammers 2 face the back of the paper 1 to be printed.
  • the frame 8 In front of the front of the paper 1 to be printed is the frame 8 which receives the type tape 3 and the ink sheet 9.
  • the frame 8 can be pivoted about the bolt 10 in order to provide free access to the paper 1 to be printed.
  • the ink sheet 9, the width of which corresponds to the length of the printing line, is moved back and forth between two rollers 11 and 12, one of which serves as a supply roller and the other as a winding roller. Both ends of the two rollers are on driving disks 13 and 14 pushed on and positively connected to the same. Each drive plate 13 or 14 is connected to an electric motor (not shown). The electric motor assigned to the supply roller generates a braking torque in order to keep the ink sheet 9 taut.
  • the ink sheet 9 drawn off the roller 11 in FIG. 1 is guided over the arcuate guide 15 and is guided at a short distance from the type belt 3 into the channel 16, from where it reaches the roller 12 via the deflection plate 17.
  • FIG. 2 the area A of FIG. 1 is shown greatly enlarged in order to clarify the guidance of the ink sheet 9 and its position in relation to the type tape 3.
  • the tongue 18, which prevents the ink sheet 9 from touching the paper 1 to be printed, is arranged above the type band 3 between the paper 1 to be printed and the arcuate guide 15.
  • the ink sheet 9 passing between the tongue 18 and the arcuate guide 15 is guided over the end of the arcuate guide 15 designed as a guide surface 19, which together with the guide surface 20 arranged underneath the type tape 3 a distance between the ink sheet 9 and the types 21 or Clock marks 22 of type tape 3 are generated.
  • the arcuate guide 15 is arranged concentrically with the roller 23 acting as a pressure abutment.
  • the diameter of the roller 23 is dimensioned such that the curvature of the cylinder jacket is in a ratio to the height of the printed character, which does not allow the arch height of the support surface under the struck character to become so great that the upper and lower part of the types are only slightly imprinted .
  • the sheet height is 51 .mu.m, so that there is no harmful impairment of the print quality.
  • the gap 24 is particularly important for the electric motor-free drive of the roller 23 described below, in order to keep the frictional moments counteracting the drive as low as possible.
  • the type belt 3 is guided over the rollers 25, one of which is driven.
  • the type tape 3 is made of steel and has the types 21 and timing marks 22 which protrude from the surface of the type tape by etching or embossing. In the case of printers with high printing performance, the circulation speed of the type tape 3 is considerable.
  • the type tape 3 touches the roller 23 on its side facing the paper 1 to be printed over its entire length and the other straight section of the type tape 3 extends through the gap of the U-shaped protective strip 26.
  • the roller 23 is set in a very slow rotation by the geared motor 27 (approx. One revolution per 72 hours).
  • the roller 23 is connected to the gear 28, which is connected via the idler gear 29 to the output pinion 30 of the geared motor 27.
  • the roller 23 can also be driven without the aid of the geared motor 27.
  • the longitudinal axis of the roller 23 is slightly inclined relative to the edge of the type tape 3.
  • the angle of inclination a is 2 to 6 minutes of angle.
  • the rotational speed of the roller 23 can be changed by changing the angle of inclination.
  • the inclination must not be so great that the line of contact between the type belt and the roller no longer falls into the type field for the types of the edge area of the printing line.

Landscapes

  • Handling Of Sheets (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)

Claims (4)

1. Procédé d'impression comprenant l'utilisation d'un appui d'impression (23) pour une bande à caractères sans fin circulante (3) d'une imprimante ligne par ligne, bande qui est guidée sur deux rouleaux et dont un segment rectiligne, s'étendant parallèlement à la ligne d'impression, s'appuie sur l'appui d'impression (23), un ruban encré (9) et le papier à imprimer (1) passant entre ledit segment et la rangée de marteaux d'impression (2), caractérisé en ce que l'appui d'impression (23), sous la forme d'un cylindre, tourne continuellement avec une très faible vitesse circonférentielle et sa génératrice est adjacente au segment rectiligne de la bande à caractères (3) qui n'est pas adjacent aux marteaux d'impression (2).
2. Appui d'impression destiné à être utilisé dans le procédé selon la revendication 1, caractérisé en ce que, pour l'entraînement du cylindre (23), l'axe longitudinal de ce cylindre est légèrement incliné par rapport au bord du segment rectiligne de la bande à caractères (3).
3. Appui d'impression destiné à être utilisé dans le procédé selon la revendication 1, caractérisé en ce que, pour l'entraînement, le cylindre (23) est relié rigidement à une roue dentée (28) qui est en prise avec un moteur à réducteur (27).
4. Appui d'impression selon la revendication 2 ou la revendication 3, caractérisé en ce que, dans sa partie supérieure, le cylindre (23) est recouvert sur toute sa longueur par un guide (15) en forme d'arc et qu'une fente d'air (24) est présente entre ces éléments et en ce que l'extrémité du guide qui est dirigée vers le papier à imprimer (1) présente une surface de guidage (19) qui, en coopération avec une surface de guidage (20) qui se trouve de l'autre côté de la bande à caractères (3), maintient une certaine distance entre les caractères ou repéres de commande (22) et le ruban encré (9).
EP80104963A 1980-08-21 1980-08-21 Procédé d'impression comprenant l'utilisation d'un cylindre d'appui pour la bande à caractères d'une imprimante ligne par ligne Expired EP0046812B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP80104963A EP0046812B1 (fr) 1980-08-21 1980-08-21 Procédé d'impression comprenant l'utilisation d'un cylindre d'appui pour la bande à caractères d'une imprimante ligne par ligne
DE8080104963T DE3069706D1 (en) 1980-08-21 1980-08-21 Printing process using a roller platen for a character belt in a line printer
US06/263,622 US4377973A (en) 1980-08-21 1981-05-14 Support for a type belt of a line printer
CA000380778A CA1161691A (fr) 1980-08-21 1981-06-26 Support de courroie de frappe sur imprimante lineaire
JP56107167A JPS5753362A (en) 1980-08-21 1981-07-10 Line printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80104963A EP0046812B1 (fr) 1980-08-21 1980-08-21 Procédé d'impression comprenant l'utilisation d'un cylindre d'appui pour la bande à caractères d'une imprimante ligne par ligne

Publications (2)

Publication Number Publication Date
EP0046812A1 EP0046812A1 (fr) 1982-03-10
EP0046812B1 true EP0046812B1 (fr) 1984-11-28

Family

ID=8186761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104963A Expired EP0046812B1 (fr) 1980-08-21 1980-08-21 Procédé d'impression comprenant l'utilisation d'un cylindre d'appui pour la bande à caractères d'une imprimante ligne par ligne

Country Status (5)

Country Link
US (1) US4377973A (fr)
EP (1) EP0046812B1 (fr)
JP (1) JPS5753362A (fr)
CA (1) CA1161691A (fr)
DE (1) DE3069706D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS604089A (ja) * 1983-06-22 1985-01-10 Janome Sewing Mach Co Ltd カラ−プリンタにおける印字色選択方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2083365A (en) * 1935-12-05 1937-06-08 Ibm Typewriting machine
US2858926A (en) * 1955-03-01 1958-11-04 Standard Register Co Strip feeding device
JPS5313454Y2 (fr) * 1972-06-30 1978-04-11
JPS4944306U (fr) * 1972-07-21 1974-04-18
US4211166A (en) * 1977-05-23 1980-07-08 Computer Peripherals, Inc. Print band one edge guide
DE2753132A1 (de) * 1977-11-29 1979-05-31 Ibm Deutschland Druckwiderlager fuer anschlagdrucker, insbesondere typenbanddrucker
DE2829827C2 (de) * 1978-07-07 1986-04-10 Olympia Werke Ag, 2940 Wilhelmshaven Führungseinrichtung für Aufzeichnungsträger bei Druckwerken

Also Published As

Publication number Publication date
EP0046812A1 (fr) 1982-03-10
JPS5753362A (en) 1982-03-30
JPS635273B2 (fr) 1988-02-02
DE3069706D1 (en) 1985-01-10
CA1161691A (fr) 1984-02-07
US4377973A (en) 1983-03-29

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