EP0504594A2 - Device for the positive relief of a take-up spool in an ink ribbon cartridge - Google Patents

Device for the positive relief of a take-up spool in an ink ribbon cartridge Download PDF

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Publication number
EP0504594A2
EP0504594A2 EP92102568A EP92102568A EP0504594A2 EP 0504594 A2 EP0504594 A2 EP 0504594A2 EP 92102568 A EP92102568 A EP 92102568A EP 92102568 A EP92102568 A EP 92102568A EP 0504594 A2 EP0504594 A2 EP 0504594A2
Authority
EP
European Patent Office
Prior art keywords
take
spool
reel
tape
ink ribbon
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.)
Withdrawn
Application number
EP92102568A
Other languages
German (de)
French (fr)
Other versions
EP0504594A3 (en
Inventor
Friedrich-Viktor Miehe
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.)
Francotyp Postalia GmbH
Original Assignee
Francotyp Postalia 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 Francotyp Postalia GmbH filed Critical Francotyp Postalia GmbH
Publication of EP0504594A2 publication Critical patent/EP0504594A2/en
Publication of EP0504594A3 publication Critical patent/EP0504594A3/en
Withdrawn legal-status Critical Current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
    • B41J33/00—Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
    • B41J33/14—Ribbon-feed devices or mechanisms
    • B41J33/52—Braking devices therefor
    • 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
    • B41J32/00—Ink-ribbon cartridges

Definitions

  • the invention relates to an arrangement on a tape cassette for relieving the force on the take-up reel provided with a slip clutch, in which the ink or thermal ribbon is guided from a supply reel via deflection rollers past a printhead to the take-up reel.
  • Ribbon and thermal print cartridges generally have a supply spool and a take-up spool for the ribbon.
  • Several deflection rollers serve to guide the belt.
  • Various possibilities are known for this (DE-38 08 603 A1, DE-38 00 113 A1, EP-0 189 984 B1) to hold the band under appropriate pretension and to prevent sagging.
  • a belt drive for winding continuously exerts a force on the belt. This can lead to the fact that even if the paper to be printed is not in contact with the tape or is in contact with the tape but is not moved, an additional tape feed occurs due to high tensile forces through the take-up reel.
  • the object of the invention was to ensure that the winding is decoupled from the forces that can be achieved by friction between the ribbon and the paper, both when the take-up train is switched on permanently and when required.
  • the cassette 1 for ink or thermal ribbons 2 encloses a supply reel 3 and a take-up reel 4.
  • a plurality of deflection rollers 5 serve to guide the tape.
  • the tape 2 is guided from the supply reel 3 to the take-up reel 4 via the print head 6.
  • a meandering tape guide 7 is additionally provided between the deflection rollers 5 arranged after the print head 6 and in front of the take-up reel 4.
  • This meandering band guide 7 consists of several staggered rollers. An arrangement of three rollers has proven to be expedient.
  • the meandering tape guide 7 relieves the load on the take-up spool 4, since an increased frictional force is achieved due to the wrap angle of the tape 2 on the tape guide 7. Thus, the tensile force can vary to a considerable extent without the tape 2 being pulled off the supply reel 3 in the idle state. Only when the wrap angle is reduced by the feed of the tape 2 through the friction between tape 2 and paper 8, a tape transport takes place.

Abstract

For the force-related relief of the take-up spool of a cartridge for ink ribbon or thermal ribbon, a meandering tape guide is provided ahead of the take-up spool. <IMAGE>

Description

Die Erfindung betrifft eine Anordnung an einer Bandkassette zur kraftmäßigen Entlastung der mit einer Rutschkupplung versehenen Aufwickelspule, bei der das Farb- oder Thermoband von einer Vorratsspule über Umlenkrollen an einem Druckkopf vorbei zur Aufwickelspule geführt wird.The invention relates to an arrangement on a tape cassette for relieving the force on the take-up reel provided with a slip clutch, in which the ink or thermal ribbon is guided from a supply reel via deflection rollers past a printhead to the take-up reel.

Farbband- und Thermodruckkassetten weisen allgemein eine Vorratsspule und eine Aufwickelspule für das Band auf. Mehrere Umlenkrollen dienen der Führung des Bandes. Zur Erzielung gleichbleibender Druckqualität ist es notwendig, das Band, insbesondere bei Thermodruckern, straff zu spannen. Hierzu sind verschiedene Möglichkeiten bekannt (DE-38 08 603 A1, DE-38 00 113 A1, EP-0 189 984 B1), das Band unter einer entsprechenden Vorspannung zu halten und einen Durchhang zu vermeiden. Gemeinsam ist diesen Anordnungen, daß auch im Ruhezustand bei eingeschalteten Maschinen ein Riementrieb zum Aufwickeln ständig auf das Band eine Kraft ausübt. Dies kann dazu führen, daß auch dann, wenn das zu bedruckende Papier nicht im Kontakt mit dem Band steht, oder im Kontakt mit dem Band steht aber nicht bewegt wird, ein zusätzlicher Bandvorschub aufgrund großer Zugkräfte durch die Aufwickelspule geschieht.Ribbon and thermal print cartridges generally have a supply spool and a take-up spool for the ribbon. Several deflection rollers serve to guide the belt. In order to achieve consistent print quality, it is necessary to tighten the ribbon, especially with thermal printers. Various possibilities are known for this (DE-38 08 603 A1, DE-38 00 113 A1, EP-0 189 984 B1) to hold the band under appropriate pretension and to prevent sagging. Common to these arrangements is that even when the machine is in the idle state, a belt drive for winding continuously exerts a force on the belt. This can lead to the fact that even if the paper to be printed is not in contact with the tape or is in contact with the tape but is not moved, an additional tape feed occurs due to high tensile forces through the take-up reel.

Der Erfindung lag die Aufgabe zugrunde, sowohl bei permanentem als auch bei bedarfsweise eingeschaltetem Aufwickelzug eine Entkopplung der Aufwicklung von den durch Reibung zwischen Farbband und Papier erzielbaren Kräften zu gewährleisten.The object of the invention was to ensure that the winding is decoupled from the forces that can be achieved by friction between the ribbon and the paper, both when the take-up train is switched on permanently and when required.

Diese Aufgabe ist durch die Erfindung gelöst, wie sie im ersten Patentanspruch dargelegt ist. Weitere vorteilhafte Ausbildungen sind Gegenstand der Unteransprüche.This object is achieved by the invention as set out in the first claim. Further advantageous developments are the subject of the dependent claims.

Anhand einer Zeichnung wird die Erfindung nachfolgend näher beschrieben.The invention is described in more detail below with reference to a drawing.

Die Kassette 1 für Farb- oder Thermobänder 2 umschließt eine Vorratsspule 3 und eine Aufwickelspule 4. Mehrere Umlenkrollen 5 dienen der Bandführung. Über den Druckkopf 6 wird das Band 2 von der Vorratsspule 3 zur Aufwickelspule 4 geführt. Zwischen den, nach dem Druckkopf 6 und vor der Aufwickelspule 4 angeordneten Umlenkrollen 5 ist eine mäanderförmige Bandführung 7 zusätzlich vorgesehen. Diese mäanderförmige Bandführung 7 besteht aus mehreren versetzt angeordneten Rollen. Als zweckmäßig hat sich eine Anordnung aus drei Rollen erwiesen. Durch die mäanderförmige Bandführung 7 wird eine kraftmäßige Entlastung der Aufwickelspule 4 erreicht, da bedingt durch den Umschlingungswinkel des Bandes 2 an der Bandführung 7 eine erhöhte Reibkraft erzielt wird. Somit kann die Zugkraft in erheblichem Umfang variieren, ohne daß im Ruhezustand das Band 2 von der Vorratsspule 3 abgezogen wird. Erst wenn der Umschlingungswinkel durch den Vorschub des Bandes 2 über die Reibung zwischen Band 2 und Papier 8 verringert wird, findet ein Bandtransport statt.The cassette 1 for ink or thermal ribbons 2 encloses a supply reel 3 and a take-up reel 4. A plurality of deflection rollers 5 serve to guide the tape. The tape 2 is guided from the supply reel 3 to the take-up reel 4 via the print head 6. A meandering tape guide 7 is additionally provided between the deflection rollers 5 arranged after the print head 6 and in front of the take-up reel 4. This meandering band guide 7 consists of several staggered rollers. An arrangement of three rollers has proven to be expedient. The meandering tape guide 7 relieves the load on the take-up spool 4, since an increased frictional force is achieved due to the wrap angle of the tape 2 on the tape guide 7. Thus, the tensile force can vary to a considerable extent without the tape 2 being pulled off the supply reel 3 in the idle state. Only when the wrap angle is reduced by the feed of the tape 2 through the friction between tape 2 and paper 8, a tape transport takes place.

Claims (3)

Anordnung an einer Bandkassette zur kraftmäßigen Entlastung der mit einer Rutschkupplung versehenen Aufwickelspule, bei der das Farb- oder Thermoband von einer Vorratsspule über Umlenkrollen an einem Druckkopf vorbei zur Aufwickelspule geführt wird, dadurch gekennzeichnet, daß zwischen den zwischen Druckkopf (6) und Aufwickelspule (4) angeordneten Umlenkrollen (5) eine mäanderförmige Bandführung (7) vorgesehen ist.Arrangement on a tape cassette for relieving the force on the take-up reel provided with a slip clutch, in which the ink or thermal ribbon is guided from a supply reel via deflection rollers past a printhead to the take-up reel, characterized in that between the print head (6) and take-up reel (4 ) arranged deflection rollers (5) a meandering band guide (7) is provided. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß die mäanderförmige Bandführung (7) aus versetzt angeordneten Rollen gebildet ist.Arrangement according to claim 1, characterized in that the meandering band guide (7) is formed from staggered rollers. Anordnung nach Anspruch 2, dadurch gekennzeichnet, daß drei Rollen die mäanderförmige Bandführung (7) bewirken.Arrangement according to claim 2, characterized in that three rollers effect the meandering band guide (7).
EP19920102568 1991-03-21 1992-02-15 Device for the positive relief of a take-up spool in an ink ribbon cartridge Withdrawn EP0504594A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9103568U DE9103568U1 (en) 1991-03-21 1991-03-21
DE9103568U 1991-03-21

Publications (2)

Publication Number Publication Date
EP0504594A2 true EP0504594A2 (en) 1992-09-23
EP0504594A3 EP0504594A3 (en) 1993-01-13

Family

ID=6865584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920102568 Withdrawn EP0504594A3 (en) 1991-03-21 1992-02-15 Device for the positive relief of a take-up spool in an ink ribbon cartridge

Country Status (3)

Country Link
EP (1) EP0504594A3 (en)
CA (1) CA2063668A1 (en)
DE (1) DE9103568U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0730974A2 (en) * 1995-03-07 1996-09-11 Francotyp-Postalia Aktiengesellschaft & Co. Apparatus and ribbon cartridge for thermal transfer printing
DE19509683C2 (en) * 1995-03-07 2000-06-21 Francotyp Postalia Gmbh Thermal transfer printing process and arrangement for carrying out the process with a multi-use ribbon cassette

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877561A (en) * 1971-10-04 1975-04-15 Olivetti & Co Spa Cartridge for the carbon ribbon of a typewriter, calculating machine, accounting machine or like office machines
DE2452103A1 (en) * 1974-11-02 1976-05-06 Anker Werke Ag Tensioning device for ink ribbon in typewriters - comprises brush pressing onto ribbon core of unwinding spool
GB2003832A (en) * 1977-09-06 1979-03-21 Dick Co Ab Ribbon cartridge
EP0218500A1 (en) * 1985-09-05 1987-04-15 Societe D'applications Generales D'electricite Et De Mecanique Sagem Print ribbon cassette for a printer, in particular for a thermal transfer printer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877561A (en) * 1971-10-04 1975-04-15 Olivetti & Co Spa Cartridge for the carbon ribbon of a typewriter, calculating machine, accounting machine or like office machines
DE2452103A1 (en) * 1974-11-02 1976-05-06 Anker Werke Ag Tensioning device for ink ribbon in typewriters - comprises brush pressing onto ribbon core of unwinding spool
GB2003832A (en) * 1977-09-06 1979-03-21 Dick Co Ab Ribbon cartridge
EP0218500A1 (en) * 1985-09-05 1987-04-15 Societe D'applications Generales D'electricite Et De Mecanique Sagem Print ribbon cassette for a printer, in particular for a thermal transfer printer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0730974A2 (en) * 1995-03-07 1996-09-11 Francotyp-Postalia Aktiengesellschaft & Co. Apparatus and ribbon cartridge for thermal transfer printing
EP0730974A3 (en) * 1995-03-07 1998-01-07 Francotyp-Postalia Aktiengesellschaft & Co. Apparatus and ribbon cartridge for thermal transfer printing
US5821975A (en) * 1995-03-07 1998-10-13 Francotyp-Postalia Ag & Co. Method and apparatus for monitoring inking ribbon usage in a thermal printing process and for controlling printing dependent theron
US5949467A (en) * 1995-03-07 1999-09-07 Francotyp-Postalia Ag & Co. Method and apparatus for preventing usage of an unauthorized inking ribbon in a thermal printing process
DE19509683C2 (en) * 1995-03-07 2000-06-21 Francotyp Postalia Gmbh Thermal transfer printing process and arrangement for carrying out the process with a multi-use ribbon cassette
US6141029A (en) * 1995-03-07 2000-10-31 Francotypo-Postalia Ag & Co. Method and thermal printing apparatus for identifying an end of an inking ribbon

Also Published As

Publication number Publication date
DE9103568U1 (en) 1991-06-27
EP0504594A3 (en) 1993-01-13
CA2063668A1 (en) 1992-09-22

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