EP0045360B1 - Bande porte-caractères pour une imprimante à bande - Google Patents

Bande porte-caractères pour une imprimante à bande Download PDF

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Publication number
EP0045360B1
EP0045360B1 EP81104232A EP81104232A EP0045360B1 EP 0045360 B1 EP0045360 B1 EP 0045360B1 EP 81104232 A EP81104232 A EP 81104232A EP 81104232 A EP81104232 A EP 81104232A EP 0045360 B1 EP0045360 B1 EP 0045360B1
Authority
EP
European Patent Office
Prior art keywords
type
ribbon
ptfe
band
tape
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
EP81104232A
Other languages
German (de)
English (en)
Other versions
EP0045360A3 (en
EP0045360A2 (fr
Inventor
Horst Dietrich 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
Publication of EP0045360A2 publication Critical patent/EP0045360A2/fr
Publication of EP0045360A3 publication Critical patent/EP0045360A3/de
Application granted granted Critical
Publication of EP0045360B1 publication Critical patent/EP0045360B1/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
    • 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 type tape for a type tape printer.
  • Usual type tape printers e.g. the IBM type tape printer 3288, 3289) have an all-round type tape, which presents itself as a steel tape with raised print types and tact marks etched out by photochemical means.
  • the following arrangement of the steel strip in relation to a pressure abutment and the record carrier and ink ribbon to be considered is decisive for the printing of a character:
  • the smooth back of the steel strip moves past the pressure abutment.
  • the ribbon and the recording medium are located in front of the front of the ribbon with the raised printing types.
  • the character imprint in a certain printing position is effected by a printing hammer, which strikes the recording medium and presses it against the ink ribbon, the type of steel ribbon to be printed and the platen.
  • Such a polishing process turns out to be very complex and expensive and is also very difficult to control. In other words: the polishing process often does not lead to the desired result.
  • Fig. 1 is shown in a sectional view how the type tape 1 is arranged opposite the platen 2, the ink sheet 3 and the record carrier 4 and the print hammer 5.
  • the hammer 5 strikes against the recording medium 4, the ink ribbon 3, the raised etched print type 6 on the front side 1-1 of the type tape 1 and presses the type tape 1 with its rear side 1-2 against the pressure abutment 6.
  • the type ribbon 1 moves in the direction perpendicular to the plane of the drawing, while the ink ribbon 4 remains relatively stationary.
  • there is a strong lateral stress on the ribbon caused by the sharp printing type edges of the character 6. This stress can ultimately lead to destruction of the ribbon tissue, so that - as already indicated - when using »untreated « type ribbons, the ribbons must be replaced frequently.
  • FIG. A perspective partial view of the front side 1-1 of the type tape with raised etched out types (6-1, 6-2) and timing marks (6-1-1, 6-2-2) is shown. Excerpts of types H (6-1) and I (6-2) can be seen on the front 1-1 of volume 1. The timing marks assigned to these printing types (6-1-1 and 6-2-2) are also etched out. They are used to synchronize the pressure control.
  • FIG. 3 shows a sectional illustration of the type tape along the section line A-A according to FIG. 2. It can be seen that the type and timing mark edges (7) are extremely angular, which ultimately has a destructive effect on the ink ribbon. (This sharpness of the print types naturally also applies to the cutting direction indicated by B-B in FIG. 2.)
  • PTFE polytetrafluoroethylene
  • FIG. 4A and B show schematic sectional representations of a type strip before and after use, which was coated with a PTFE-containing material.
  • the cutting line would correspond to B-B of FIG. 2 if the type strip shown there had been coated.
  • the metallic cut surface is heavily hatched, while the cut surface is only slightly hatched by the layer 12 containing PTFE.
  • the PTFE-containing material is not only deposited on the locations 8 between the type elevations 6-1 and clock mark elevations 6-2, but also at locations 9 on the type surface to be printed, as well as embankment-like at locations 10 on both sides of the types - or time stamp surveys.
  • the material containing PTFE deposited in the areas 9 is rubbed off in the shortest possible time (with high printing performance after a few cycles); it also partially attaches to the embankments 11 (Fig. 4B). From this representation it can be seen that, compared to the representation according to FIG. 3, the effective type and clock mark edges are no longer so sharply formed (embedded in material containing PTFE) and therefore can no longer have such a destructive effect on the ribbon fabric.
  • the PTFE-containing layer must also contain certain additives (resins) that guarantee the abrasion resistance of the layer.
  • resins additives
  • Such admixtures to achieve a higher abrasion resistance are commercially available (eg as »TEFLON S «, registered trademark of the Dupont company).
  • the application of pure PTFE required e.g. B. for reasons of liability on the base material, a previous sandblasting and a high temperature. However, both of these boundary conditions would not be acceptable, particularly for type bands.
  • the layer containing PTFE is applied by spraying with a subsequent moderate heat treatment.
  • the contamination occurring in the area of the type tape is reduced, since fewer type fibers and colored particles are entrained by the type tape in coated type tapes and are only transported to a small extent due to the anti-adhesive properties of the layer surface.
  • the layer containing PTFE is of course also slightly removed. At the same time as this removal, however, there is also a rounding of the type or clock mark edges, so that there is no destructive effect on the ink sheet, as would be the case from the start with an uncoated and polished band.
  • the coating on the front of the type tape also leads to a reduction in wear on the surface of the type tape, which is due to the formation of a thin film of the PTFE, which is also to be understood as a dry lubricant, both on the type surfaces to be printed and on the fabric of the ink sheet.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Printers Characterized By Their Purpose (AREA)

Claims (3)

1. Bande porte-caractères pour une imprimante à bande, caractérisée en ce que la bande porte-caractères (1) a un revetement composé d'un matériau synthétique (12).
2. Dispositif selon la revendication 1, caractérisé en ce que le matériau de ladite couche contient du polytétrafluoréthylène (PFTE).
3. Dispositifs selon la revendication 1 ou 2, caractérisés en ce que la bande porte-caractères (1) comportant lesdits caractères d'impression (6) disposés saillants sur ladite bande (1) et profilés en relief de façon connue en soi est recou- verte dudit matériau en couche (12) d'une épaisseur telle que ledit matériau en couche est disposé à la surface et sur les flancs desdits caractères d'impression ayant le profil d'un talus de manière à réaliser une crete.
EP81104232A 1980-07-31 1981-06-03 Bande porte-caractères pour une imprimante à bande Expired EP0045360B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3029023 1980-07-31
DE19803029023 DE3029023A1 (de) 1980-07-31 1980-07-31 Typenband fuer einen typenbanddrucker

Publications (3)

Publication Number Publication Date
EP0045360A2 EP0045360A2 (fr) 1982-02-10
EP0045360A3 EP0045360A3 (en) 1982-12-29
EP0045360B1 true EP0045360B1 (fr) 1984-09-19

Family

ID=6108546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104232A Expired EP0045360B1 (fr) 1980-07-31 1981-06-03 Bande porte-caractères pour une imprimante à bande

Country Status (3)

Country Link
EP (1) EP0045360B1 (fr)
JP (1) JPS5745064A (fr)
DE (2) DE3029023A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0342315A (ja) * 1989-07-10 1991-02-22 Hino Motors Ltd 自動車に使用されるリア・サスペンション
US5983789A (en) * 1999-01-28 1999-11-16 Monarch Marking Systems, Inc. Printing band and method of making same
DE102013227188A1 (de) * 2013-12-27 2015-07-02 Federal-Mogul Wiesbaden Gmbh Selbstschmierende thermoplastische Schichten mit Zusatz von PTFE mit polymodalem Molekulargewicht

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1026994A (fr) * 1974-01-07 1978-02-28 Computer Peripherals Percuteur d'impression
JPS51115116A (en) * 1975-04-01 1976-10-09 Nippon Electric Co Endless steel type belt for belt printer
JPS5856353B2 (ja) * 1978-07-10 1983-12-14 日本電信電話株式会社 タイプホイ−ル
JPS55166252A (en) * 1979-06-13 1980-12-25 Hitachi Koki Co Ltd Printing device

Also Published As

Publication number Publication date
EP0045360A3 (en) 1982-12-29
DE3166146D1 (en) 1984-10-25
DE3029023A1 (de) 1982-02-25
EP0045360A2 (fr) 1982-02-10
JPS5745064A (en) 1982-03-13
JPS6133707B2 (fr) 1986-08-04

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