EP0064143B1 - Anordnung für Typenbanddrucker zum Verhindern ungewünschter Berührung zwischen dem Abdruckmaterial und dem Papier - Google Patents

Anordnung für Typenbanddrucker zum Verhindern ungewünschter Berührung zwischen dem Abdruckmaterial und dem Papier Download PDF

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Publication number
EP0064143B1
EP0064143B1 EP82101863A EP82101863A EP0064143B1 EP 0064143 B1 EP0064143 B1 EP 0064143B1 EP 82101863 A EP82101863 A EP 82101863A EP 82101863 A EP82101863 A EP 82101863A EP 0064143 B1 EP0064143 B1 EP 0064143B1
Authority
EP
European Patent Office
Prior art keywords
paper
line
ribbon
printing unit
separator plate
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
EP82101863A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0064143A2 (de
EP0064143A3 (en
Inventor
Horst Ing. Grad. Heinrich
Günther Reimer Ing. grad. Herrmann
Manfred Ing. Grad. Schmidt
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
Publication of EP0064143A2 publication Critical patent/EP0064143A2/de
Publication of EP0064143A3 publication Critical patent/EP0064143A3/de
Application granted granted Critical
Publication of EP0064143B1 publication Critical patent/EP0064143B1/de
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
    • 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
    • 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
    • B41J31/00—Ink ribbons; Renovating or testing ink ribbons
    • B41J31/12—Ink ribbons having arrangements to prevent undesired contact between the impression-transfer material and machine parts or other articles

Definitions

  • the invention relates to a printing unit with a circulating, endless type tape, which is guided over a platen with a substantially flat surface, with print hammers and with paper guided in the gap between the print hammers and the rotating types and ribbon running parallel to the lines, with the plane between a separating plate is arranged on the paper and the ribbon.
  • US-A-3 874 285 also shows a printing unit equipped with a type drum and printing hammers, in which a screen with a recess for each printing point or type row is arranged in the gap between the type carrier and hammers between the ink ribbon and the paper.
  • This diaphragm is flexible in the direction of the print hammer movement, but it does not exert a constant active force on the paper, but experiences a deformation with each hammer movement in the direction of the outer surface of the type drum, so that the ribbon is at a certain distance from the printing times Paper is led.
  • FR-A-2 391 851 shows a printing unit of the generic design described at the outset, in which a separating plate with an opening is arranged in the plane between paper and ink ribbon.
  • This partition plate is only loosely, that is passively guided between the two elements, without being able to exert any force on one or the other of the adjacent elements, namely the paper or the ribbon. In the area of the opening of the plate, paper and ink ribbon can therefore also lie against one another between the individual printing processes.
  • the invention has for its object to ensure in a printing unit of the type described above that between the paper and the ribbon, especially in the immediate area of the respective print line, no unwanted contact and thus no contamination of the paper occurs, even if the gap between the types and the hammers through which the paper and the ribbon are guided in a flat path of movement is very narrow. This object has been achieved by the training according to claim 1.
  • the arrangement according to the invention is effective directly between the paper and the ink ribbon and ensures that the paper to be printed remains separated from the ink ribbon at all times, except when the types are being printed, and therefore no contamination can occur on the paper.
  • the arrangement according to the invention also makes it easier to insert the ribbon between paper and type ribbon.
  • the invention also achieves a certain braking effect on the paper, so that there is a uniform pretension which counteracts the flutter when the paper is fed.
  • Another advantage of the invention is that the partition plate can be retrofitted into a type tape printer without difficulty.
  • the type tape printing unit shown in FIGS. 1 and 2 contains an endless type tape 1 made of steel, each with a track for the types 2 and the time stamps 3.
  • the type tape 1 is guided over a drive roller 4 and over a tension roller 5.
  • a synchronous motor 6 is used to drive the type belt 1 and is effective on the drive roller 4 via a toothed belt 7, a toothed belt pulley 8 and a drive shaft 9.
  • a non-ferrous metal pressure abutment 10 is arranged within the type band loop and serves to guide the type band 1 and as a pressure abutment for the print hammers 11, which are arranged on the rear side of the printing unit in a print hammer unit 12.
  • the paper 13 is guided in the gap between the print hammers 11 and the type tape 1 and receives its feed by means of spike wheels 14 driven in the direction of the arrow Coil 17 is moved back and forth.
  • Magnetic scanners 18 control the switching of the ink ribbon 15 when the respective supply spool is almost empty or the respective take-up spool is full.
  • a hammer plate 19 is arranged on the front of the print hammer unit 12 in a vertical orientation.
  • a cutout 20 in the hammer plate 19 for the heads 11a of the print hammers 11 enables them to be actuated in the direction of the type tape 1 and the pressure abutment 10.
  • a separating plate 21 is attached to a frame part 24 and protrudes between the paper 13 and the ink ribbon 15.
  • the partition plate 21 is provided with two longitudinal fold lines 22a, 22b and an incision 23.
  • the incision 23 is at the height of the print line and is a small amount longer than the row of print hammer, corresponding to the length of the print line. The incision 23 therefore clears the way for the print hammers 11 to print the types.
  • tab-shaped side parts 21 a are integrally formed on the partition plate 21. The side parts 21a therefore protrude on both sides of the printing line into the gap between the ink ribbon 15 and the paper 13.
  • the partition plate 21 is on the frame part 24 in a suitable manner, for. B. by means of screws (as indicated in Fig. 3) or by gluing. 'As a material for the partition plate 21, a film made of transparent plastic, z. B. a polyester film.
  • the thickness of the separating plate 21 is in the range between 0.2 and 0.5 mm and is chosen so that the separating plate 21 constantly exerts sufficient force on the paper 13 under the effect of its inherent elasticity to separate it from the ink ribbon 15 and against it to press the hammer plate 19.
  • the separating plate 21 has a cross section in the form of a flattened z (FIG. 2), the lowermost leg lying flat against the frame part 24 to which it is fastened, and the upper edge 23a or the fold lines 22b rest against the paper 13, pressing it against the hammer plate 19.
  • the best effect is achieved if the upper edge 23a of the separating plate 21 is arranged as close as possible to the lower edge of the printing line.
  • FIG. 2A shows an alternative embodiment of the hammer plate 19, in which the contact line of the separating plate 21 is clearly defined by a corresponding shape of the hammer plate.
  • the separating plate 21 lies here with its upper edge 23a or the fold lines 22b on the projection 19a of the hammer plate 19, whereby an improved pre-tensioning of the paper 13 is achieved.
  • the printing process is triggered and the print hammers 11 are each struck at the point in time at which the relevant character of the ink ribbon 1 is at the printing position at which it is printed should.
  • the paper 13 executes a feed step in the direction of the arrow under the drive of the sprockets 14 and is set to the next line to be printed.
  • a brake bar 25 shown schematically in FIG. 2 pressing the paper against the hammer plate 19 is released, e.g. B. electromagnetically against a spring force, so that the paper 13 can be moved without braking.
  • the ink ribbon 15 produces discolorations on the paper 13 during the relative movements between paper 13 and ink ribbon 15, with the result that the non-printed surface areas are contaminated.
  • the separating plate presses the paper 13 in the region of the ink ribbon 15 this to the hammer plate 19 and thus causes a separation of the ribbon and paper. This separation takes place both in the edge region on both sides of the printing line due to the side parts 21a located between the paper 13 and the ink ribbon 15, and also in the entire region of the printing line and the ink ribbon 15. Soiling of the paper 13 by the ink ribbon 15 is therefore avoided.
  • partition plate 21 by its constant contact with the paper 13 against the surface of the hammer plate 19 also supports the effect of the brake bar 25 and contributes to the maintenance of a certain paper tension. This applies in particular to the embodiment according to FIG. 2A. In this way, the paper guide is stabilized and the printing process is influenced favorably.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Handling Of Sheets (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)
EP82101863A 1981-04-23 1982-03-09 Anordnung für Typenbanddrucker zum Verhindern ungewünschter Berührung zwischen dem Abdruckmaterial und dem Papier Expired EP0064143B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813116137 DE3116137A1 (de) 1981-04-23 1981-04-23 Typenbanddrucker
DE3116137 1981-04-23

Publications (3)

Publication Number Publication Date
EP0064143A2 EP0064143A2 (de) 1982-11-10
EP0064143A3 EP0064143A3 (en) 1983-08-10
EP0064143B1 true EP0064143B1 (de) 1986-09-10

Family

ID=6130665

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82101863A Expired EP0064143B1 (de) 1981-04-23 1982-03-09 Anordnung für Typenbanddrucker zum Verhindern ungewünschter Berührung zwischen dem Abdruckmaterial und dem Papier

Country Status (3)

Country Link
EP (1) EP0064143B1 (enrdf_load_stackoverflow)
JP (1) JPS57178883A (enrdf_load_stackoverflow)
DE (2) DE3116137A1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616943A (en) * 1983-03-11 1986-10-14 Hitachi Koki Company, Limited Apparatus for preventing the rise of an ink ribbon
JPS60171349U (ja) * 1984-04-20 1985-11-13 日立工機株式会社 シヤトルプリンタ
JPH0643144B2 (ja) * 1984-06-15 1994-06-08 富士通株式会社 印字装置
GB2209501B (en) * 1987-09-05 1991-10-02 Unisys Corp Document printing apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5230889B2 (enrdf_load_stackoverflow) * 1972-04-17 1977-08-11
US4165188A (en) * 1977-02-17 1979-08-21 Sycor, Inc. Ribbon mask and guide for dot matrix impact printers
CA1102177A (en) * 1977-05-23 1981-06-02 Thomas T. Hardt Print band one edge guide

Also Published As

Publication number Publication date
EP0064143A2 (de) 1982-11-10
JPH0136435B2 (enrdf_load_stackoverflow) 1989-07-31
JPS57178883A (en) 1982-11-04
DE3116137A1 (de) 1982-11-11
DE3273095D1 (en) 1986-10-16
EP0064143A3 (en) 1983-08-10

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