EP0186623B1 - Ink ribbon cartridge, in particular for automatic printers - Google Patents

Ink ribbon cartridge, in particular for automatic printers Download PDF

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Publication number
EP0186623B1
EP0186623B1 EP85810541A EP85810541A EP0186623B1 EP 0186623 B1 EP0186623 B1 EP 0186623B1 EP 85810541 A EP85810541 A EP 85810541A EP 85810541 A EP85810541 A EP 85810541A EP 0186623 B1 EP0186623 B1 EP 0186623B1
Authority
EP
European Patent Office
Prior art keywords
cassette
housing
take
pin
roller
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
EP85810541A
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German (de)
French (fr)
Other versions
EP0186623A1 (en
Inventor
Karl Gasser
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.)
FRANZ BUTTNER AG
Franz Buettner AG
Original Assignee
FRANZ BUTTNER AG
Franz Buettner AG
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 FRANZ BUTTNER AG, Franz Buettner AG filed Critical FRANZ BUTTNER AG
Publication of EP0186623A1 publication Critical patent/EP0186623A1/en
Application granted granted Critical
Publication of EP0186623B1 publication Critical patent/EP0186623B1/en
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
    • B41J32/00—Ink-ribbon cartridges

Definitions

  • a cassette according to the preamble of claim 1 is known from US-PS 4406554.
  • both the axis of the supply roll and the axis of the take-up roll are slidably mounted in slots in the housing.
  • the two rollers are pressed by a common spring against a roller that is rotatably mounted in the housing.
  • the roll assigned to the take-up roll is a drive roll that transmits the drive torque to the take-up roll in a non-positive manner.
  • the disadvantage here is that the pressure increases with increasing spring deflection.
  • the spring force must be measured so that the minimum necessary contact force is always available.
  • the contact pressure is larger than necessary for larger wound diameters, which leads to unnecessary friction losses.
  • this is undesirable for typewriters, because the power and size of the drive motor should be as low as possible.
  • the invention has for its object to eliminate the disadvantages of the prior art mentioned. This object is achieved by the characterizing features of claim 1.
  • the ribbon cassette shown in the drawing is particularly suitable for use in typewriters.
  • the cassette has a housing 1 and a cover 2, which is only partially shown in FIG. 1.
  • a supply roll 11 and a take-up roll 10 of an ink ribbon 9 are rotatably mounted on a common carrier 3.
  • a spring 4 presses both the supply roll 11 against a tape control roll 6 and the take-up roll 10 against a drive roll 5.
  • the belt 9 is pulled off the supply roller 11 in the direction of the arrow marked in FIG. 1 and is fed onto the take-up roller via the shut-off roller 6, a tension spring 12, an outlet opening 13, the printing location 14, an inlet opening 15 and a deflection roller 16 10 transported.
  • the carrier 3 comprises a plate 20, from which two sleeves 22, 23 protrude vertically. At the bottom, the plate 20 has two webs 21 which rest on the housing 1.
  • the cores 8 and 7 of the supply roll 11 and take-up roll 10 are rotatably mounted on the sleeves 22, 23.
  • the core 8 engages in driving pins 35 of a brake sleeve 32 mounted on the sleeve 22.
  • the brake sleeve 32 has a flange 33 at the bottom and then a groove 34 in which a leg 54 of the spring 4 rests.
  • the drive motor only has to be slightly oversized.
  • the winding core 7 rests on a shoulder 24 dimensioned according to the thickness of the flange 33 and the groove 34.
  • a round guide pin 26 is fastened coaxially to the sleeve 23 via a web 25 on the plate 20. It carries a coaxial indicator pin 27 at the bottom, which protrudes into a slot 69 of the housing 1.
  • a scale is attached to the outside of the housing adjacent to the slot 69, which enables the tape supply to be assessed.
  • Two webs 70 (FIGS. 2 and 3) extend parallel to the slot 69, between which the guide pin 26 is guided.
  • a second leg 57 of the spring 4 is inserted between the plate 20 and the guide pin 26 and abuts the web 25.
  • the spring 4 is fitted with a few turns 56 onto a pin 58 fixed to the housing and bears against a side wall 71 of the housing 1 with a bend 55.
  • the carrier 3 is freely pivotable about the axis of the guide pin 26.
  • the force acting on the web 25 of the leg 57 presses the take-up roll 10 against the drive roller 5. This force increases with increasing deflection of the leg 57.
  • the leg 54 presses the carrier 3 counterclockwise to rest the supply roll 11 on the control roll 6. Die forces acting on the sleeve 22 are shown in FIG. 6. There are the spring force 78 and the braking force 79, as well as the pressing force 77 of the control roller 6 on the supply roller 11.
  • the resultant of these three forces has a component in the direction of the drive roller 5 and thus increases the pressure force of the drive roller 5 on the take-up roller 10, which in the is essentially determined by the spring force 75 of the leg 57.
  • This component is large if the carrier 3 in FIG. 6 has moved far to the left, that is to say the take-up roll 10 is still small. It decreases with increasing size of the take-up roll 10, ie also with increasing force of the leg 57 on the web 25.
  • the initial diameter of the supply roll 11 the mutual arrangement of the rolls 5 and 6, the webs 70 and the spacing of the sleeves 22 and 23 can be optimized such that the contact pressure 74 of the drive roll 5 on the take-up roll 10 remains practically constant during winding.
  • the path of the guide pin 26 defined by the webs 70 runs through the axis of the drive roller 5, so that the guide force 76 acting on the pin 26 makes no contribution to the contact pressure 74.
  • the drive roller 5 has a square-shaped countersink 39 for engaging a drive of the typewriter.
  • a metal toothed wheel 40 with sharp-edged teeth is fastened for the transmission of the drive torque to the take-up reel 10.
  • the reel body 37 has a ratchet wheel 41 with a ratchet toothing 42 which interacts with a ratchet 66.
  • the pawl 66 sits at the end of a spring 65 formed by a U-shaped opening 67 in the housing 1 (FIG. 3).
  • a pin 43 of the roller body 37 is mounted in a bore 62 of the housing 1.
  • a bevel 63 is provided in the area of the drive roller 5.
  • the ratchet wheel 41 protrudes laterally through a window 64 in this bevel 63, so that the drive roller can be actuated by hand, for. B. to tension the band 9.
  • the drive is blocked by the pawl 66.
  • the control roller 6 has a continuous central bore 51 and is rotatably mounted on a pin 72 fixed to the housing. At the top, it carries a flag 48 on the roller body 47, which is periodically visible in a window 46 of the cover 2 during operation (FIG. 4).
  • the flag 48 enables the tape running control and the automatic shutdown of the typewriter when the flag 48 is stationary during the writing operation, that is to say the supply roll 11 is almost empty.
  • a hook 28 is provided on the carrier 3, which interacts with a shutdown cam 50 on a peg-shaped extension 49 of the control roll 6 (Fig. 5).

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  • Impression-Transfer Materials And Handling Thereof (AREA)

Description

Eine Kassette gemäss Oberbegriff des Anspruchs 1 ist aus der US-PS 4406554 bekannt. Bei dieser bekannten Kassette ist sowohl die Achse der Vorratsrolle, als auch die Achse der Aufwickelrolle in Schlitzen im Gehäuse verschiebbar gelagert. Die beiden Rollen werden durch eine gemeinsame Feder je gegen eine im Gehäuse drehbar gelagerte Rolle gepresst. Dabei ist die der Aufwickelrolle zugeordnete Rolle eine Antriebsrolle, die das Antriebsmoment kraftschlüssig auf die Aufwickelrolle überträgt.A cassette according to the preamble of claim 1 is known from US-PS 4406554. In this known cassette, both the axis of the supply roll and the axis of the take-up roll are slidably mounted in slots in the housing. The two rollers are pressed by a common spring against a roller that is rotatably mounted in the housing. The roll assigned to the take-up roll is a drive roll that transmits the drive torque to the take-up roll in a non-positive manner.

Nachteilig ist dabei, dass mit zunehmender Einfederung der Feder die Anpresskraft wächst. Die Federkraft muss so bemessen werden, dass stets die minimal nötige Anpresskraft vorhanden ist. Dadurch ist die Anpresskraft bei grösseren aufgewickelten Durchmessern höher als nötig, was zu unnötigen Reibungsverlusten führt. Dies ist jedoch bei Schreibautomaten unerwünscht, denn die Leistung und Grösse des Antriebsmotors sollte möglichst niedrig sein.The disadvantage here is that the pressure increases with increasing spring deflection. The spring force must be measured so that the minimum necessary contact force is always available. As a result, the contact pressure is larger than necessary for larger wound diameters, which leads to unnecessary friction losses. However, this is undesirable for typewriters, because the power and size of the drive motor should be as low as possible.

Der Erfindung liegt die Aufgabe zugrunde, die erwähnten Nachteile des Standes der Technik zu beseitigen. Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.The invention has for its object to eliminate the disadvantages of the prior art mentioned. This object is achieved by the characterizing features of claim 1.

In diesem Zusammenhang sei bewerkt, daß es an sich aus den EP-A-0 090 164 und 0 122 755 bekannt ist, bei einer Farbbandkassette die Aufwickel- und Vorratsrolle auf einem gemeinsamen Träger drehbar zu lagern. Dieser Träger ist jedoch dort entweder nur geradlinig verschiebbar oder nur schwenkbar gelagert. Die erfindungsgemäße kombinierte Trägerbewegung (Längsverschiebbarkeit und Verschwenkung) ist aus diesem Stand der Technik nicht bekannt.In this connection it should be considered that it is known per se from EP-A-0 090 164 and 0 122 755 to rotatably mount the winding and supply roll on a common carrier in the case of an ink ribbon cassette. However, this carrier is either only displaceable in a straight line or only pivotably mounted. The combined carrier movement according to the invention (longitudinal displaceability and pivoting) is not known from this prior art.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung erläutert. Darin zeigt :

  • Fig. 1 eine Ansicht auf eine Farbbandkassette mit.teilweise entferntem Deckel,
  • Fig. 2 einen Schnitt durch die Kassette längs der Linie 11-11 in Fig. 1,
  • Fig. 3 und Fig. 4 Detailansichten des Gehäuses,
  • Fig. 5 eine Ansicht von unten auf die Abschaltrolle, und
  • Fig. 6 eine schematische Darstellung der auf die Rollen wirkenden Kräfte.
An exemplary embodiment of the invention is explained below with reference to the drawing. It shows:
  • 1 is a view of an ink ribbon cassette with a partially removed cover,
  • 2 shows a section through the cassette along the line 11-11 in Fig. 1,
  • 3 and FIG. 4 detailed views of the housing,
  • Fig. 5 is a bottom view of the shutdown roller, and
  • Fig. 6 is a schematic representation of the forces acting on the rollers.

Die in der Zeichnung dargestellte Farbbandkassette eignet sich insbesondere für den Einsatz in Schreibautomaten. Die Kassette weist ein Gehäuse 1 und einen in Fig. 1 nur teilweise dargestellten Deckel 2 auf. Eine Vorratsrolle 11 und eine Aufwickelrolle 10 eines Farbbandes 9 sind auf einem gemeinsamen Träger 3 drehbar gelagert. Durch eine Feder 4 wird sowohl die Vorratsrolle 11 gegen eine Bandlaufkontrollrolle 6, als auch die Aufwickelrolle 10 gegen eine Antriebsrolle 5 gedrückt. Durch Drehen der Antriebsrolle 5 wird das Band 9 in der in Fig. 1 markierten Pfeilrichtung von der Vorratsrolle 11 abgezogen und über die Abschaltrolle 6, eine Spannfeder 12, eine Austrittsöffnung 13, den Druckort 14, eine Eintrittsöffnung 15 und eine Umlenkrolle 16 auf die Aufwickelrolle 10 transportiert.The ribbon cassette shown in the drawing is particularly suitable for use in typewriters. The cassette has a housing 1 and a cover 2, which is only partially shown in FIG. 1. A supply roll 11 and a take-up roll 10 of an ink ribbon 9 are rotatably mounted on a common carrier 3. A spring 4 presses both the supply roll 11 against a tape control roll 6 and the take-up roll 10 against a drive roll 5. By rotating the drive roller 5, the belt 9 is pulled off the supply roller 11 in the direction of the arrow marked in FIG. 1 and is fed onto the take-up roller via the shut-off roller 6, a tension spring 12, an outlet opening 13, the printing location 14, an inlet opening 15 and a deflection roller 16 10 transported.

Wie insbesondere aus Fig. 2 ersichtlich ist, umfasst der Träger 3 eine Platte 20, von welcher zwei Hülsen 22, 23 senkrecht abstehen. Unten weist die Platte 20 zwei Stege 21 auf, die auf dem Gehäuse 1 aufliegen. Auf den Hülsen 22, 23 sind die Kerne 8 bzw. 7 der Vorratsrolle 11 bzw. Aufwickelrolle 10 drehbar gelagert. Um die Vorratsrolle zu bremsen, greift der Kern 8 in Mitnehmerstifte 35 einer auf der Hülse 22 gelagerten Bremshülse 32 ein. Die Bremshülse 32 hat unten einen Flansch 33 und anschliessend eine Nut 34, in welcher ein Schenkel 54 der Feder 4 anliegt. Da die Kraft des Federschenkels 54 auf die Bremshülse 32 während des Betriebs annähernd konstant ist, ergibt sich durch die Reibung des Schenkels 54 auf der Bremshülse 32 ein in engen Grenzen definiertes Bremsmoment. Demzufolge muss der Antriebsmotor nur wenig überdimensioniert werden. Der Aufwickelkern 7 liegt auf einer entsprechend der Dicke des Flansches 33 und der Nut 34 bemessenen Schulter 24 auf.As can be seen in particular from FIG. 2, the carrier 3 comprises a plate 20, from which two sleeves 22, 23 protrude vertically. At the bottom, the plate 20 has two webs 21 which rest on the housing 1. The cores 8 and 7 of the supply roll 11 and take-up roll 10 are rotatably mounted on the sleeves 22, 23. In order to brake the supply roll, the core 8 engages in driving pins 35 of a brake sleeve 32 mounted on the sleeve 22. The brake sleeve 32 has a flange 33 at the bottom and then a groove 34 in which a leg 54 of the spring 4 rests. Since the force of the spring leg 54 on the brake sleeve 32 is approximately constant during operation, the friction of the leg 54 on the brake sleeve 32 results in a braking torque that is defined within narrow limits. As a result, the drive motor only has to be slightly oversized. The winding core 7 rests on a shoulder 24 dimensioned according to the thickness of the flange 33 and the groove 34.

Koaxial zur Hülse 23 ist über einen Steg 25 an der Platte 20 ein runder Führungszapfen 26 befestigt. Er trägt unten einen koaxialen Anzeigestift 27, welcher in einen Schlitz 69 des Gehäuses 1 ragt. Auf der Aussenseite des Gehäuses ist benachbart zum Schlitz 69 eine Skala angebracht, welche die Beurteilung des Bandvorrates ermöglicht. Parallel zum Schlitz 69 erstrecken sich zwei Stege 70 (Fig. 2 und 3), zwischen welchen der Führungszapfen 26 geführt ist. Ein zweiter Schenkel 57 der Feder 4 ist zwischen die Platte 20 und den Führungszapfen 26 eingeführt und liegt am Steg 25 an.A round guide pin 26 is fastened coaxially to the sleeve 23 via a web 25 on the plate 20. It carries a coaxial indicator pin 27 at the bottom, which protrudes into a slot 69 of the housing 1. A scale is attached to the outside of the housing adjacent to the slot 69, which enables the tape supply to be assessed. Two webs 70 (FIGS. 2 and 3) extend parallel to the slot 69, between which the guide pin 26 is guided. A second leg 57 of the spring 4 is inserted between the plate 20 and the guide pin 26 and abuts the web 25.

Die Feder 4 ist mit einigen Windungen 56 auf einen gehäusefesten Stift 58 aufgesteckt und liegt mit einer Biegung 55 an einer Seitenwand 71 des Gehäuses 1 an. Der Träger 3 ist um die Achse des Führungszapfens 26 frei schwenkbar. Die auf den Steg 25 wirkende Kraft des Schenkels 57 drückt die Aufwickelrolle 10 gegen die Antriebsrolle 5. Diese Kraft wächst mit zunehmender Einfederung des Schenkels 57. Andererseits drückt der Schenkel 54 den Träger 3 im Gegenuhrzeigersinn zur Anlage der Vorratsrolle 11 an die Kontrollrolle 6. Die dabei auf die Hülse 22 wirkenden Kräfte sind in Fig. 6 dargestellt. Es sind die Federkraft 78 und die Bremskraft 79, sowie die Anpresskraft 77 der Kontrollrolle 6 auf die Vorratsrolle 11. Die Resultierende dieser drei Kräfte hat eine Komponente in Richtung der Antriebsrolle 5 und vergrössert also die Anpresskraft der Antriebsrolle 5 auf die Aufwickelrolle 10, die im wesentlichen durch die Federkraft 75 des Schenkels 57 bestimmt ist. Diese Komponente ist gross, wenn der Träger 3 in Fig. 6 weit nach links gerückt, also die Aufwickelrolle 10 noch klein ist. Sie nimmt ab mit wachsender Grösse der Aufwickelrolle 10, also auch mit wachsender Kraft des Schenkels 57 auf den Steg 25. Entsprechend dem Anfangsdurchmesser der Vorratsrolle 11 lässt sich die gegenseitige Anordnung der Rollen 5 und 6, der Stege 70 sowie der Abstand der Hülsen 22 und 23 derart optimieren, dass die Anpresskraft 74 der Antriebsrolle 5 auf die Aufwickelrolle 10 während des Aufwickelns praktisch konstant bleibt. Die durch die Stege 70 definierte Bahn des Führungszapfens 26 verläuft durch die Achse der Antriebsrolle 5, so dass die auf den Zapfen 26 wirkende Führungskraft 76 keinen Beitrag zur Anpresskraft 74 liefert.The spring 4 is fitted with a few turns 56 onto a pin 58 fixed to the housing and bears against a side wall 71 of the housing 1 with a bend 55. The carrier 3 is freely pivotable about the axis of the guide pin 26. The force acting on the web 25 of the leg 57 presses the take-up roll 10 against the drive roller 5. This force increases with increasing deflection of the leg 57. On the other hand, the leg 54 presses the carrier 3 counterclockwise to rest the supply roll 11 on the control roll 6. Die forces acting on the sleeve 22 are shown in FIG. 6. There are the spring force 78 and the braking force 79, as well as the pressing force 77 of the control roller 6 on the supply roller 11. The resultant of these three forces has a component in the direction of the drive roller 5 and thus increases the pressure force of the drive roller 5 on the take-up roller 10, which in the is essentially determined by the spring force 75 of the leg 57. This component is large if the carrier 3 in FIG. 6 has moved far to the left, that is to say the take-up roll 10 is still small. It decreases with increasing size of the take-up roll 10, ie also with increasing force of the leg 57 on the web 25. Correspondingly the initial diameter of the supply roll 11, the mutual arrangement of the rolls 5 and 6, the webs 70 and the spacing of the sleeves 22 and 23 can be optimized such that the contact pressure 74 of the drive roll 5 on the take-up roll 10 remains practically constant during winding. The path of the guide pin 26 defined by the webs 70 runs through the axis of the drive roller 5, so that the guide force 76 acting on the pin 26 makes no contribution to the contact pressure 74.

Die Antriebsrolle 5 hat eine vierkantförmige Ansenkung 39 zum Eingriff eines Antriebs des Schreibautomaten. Auf einer Schulter 38 des Rollenkörpers 37 ist ein metallenes Zackenrad 40 mit scharfkantigen Zähnen befestigt für die Uebertragung des Antriebsmomentes auf die Aufwickelrolle 10. Unten weist der Rollenkörper 37 ein Klinkenrad 41 mit einer Klinkenverzahnung 42 auf, die mit einer Klinke 66 zusammenwirkt. Die Klinke 66 sitzt am Ende einer durch eine U-förmige Oeffnung 67 im Gehäuse 1 gebildeten Feder 65 (Fig. 3). Ein Zapfen 43 des Rollenkörpers 37 lagert in einer Bohrung 62 des Gehäuses 1. Zwischen der Seitenwand 71 und dem Boden des Gehäuses 1 ist im Bereich der Antriebsrolle 5 eine Abschrägung 63 vorgesehen. Das Klinkenrad 41 ragt seitlich durch ein Fenster 64 in dieser Abschrägung 63 heraus, so dass die Antriebsrolle von Hand betätigbar ist, z. B. um das Band 9 zu spannen. In Gegenrichtung ist der Antrieb durch die Klinke 66 gesperrt.The drive roller 5 has a square-shaped countersink 39 for engaging a drive of the typewriter. On a shoulder 38 of the reel body 37, a metal toothed wheel 40 with sharp-edged teeth is fastened for the transmission of the drive torque to the take-up reel 10. At the bottom, the reel body 37 has a ratchet wheel 41 with a ratchet toothing 42 which interacts with a ratchet 66. The pawl 66 sits at the end of a spring 65 formed by a U-shaped opening 67 in the housing 1 (FIG. 3). A pin 43 of the roller body 37 is mounted in a bore 62 of the housing 1. Between the side wall 71 and the bottom of the housing 1, a bevel 63 is provided in the area of the drive roller 5. The ratchet wheel 41 protrudes laterally through a window 64 in this bevel 63, so that the drive roller can be actuated by hand, for. B. to tension the band 9. In the opposite direction, the drive is blocked by the pawl 66.

Die Kontrollrolle 6 hat eine durchgehende zentrale Bohrung 51 und ist auf einem gehäusefesten Zapfen 72 drehbar gelagert. Oben trägt sie auf dem Rollenkörper 47 eine Fahne 48, welche während des Betriebs periodisch in einem Fenster 46 des Deckels 2 sichtbar ist (Fig. 4). Die Fahne 48 ermöglicht die Bandlaufkontrolle und die automatische Abschaltung des Schreibautomaten, wenn während des Schreibbetriebes die Fahne 48 stillsteht, also die Vorratsrolle 11 nahezu leer ist. Um eine sichere Abschaltung bereits vor dem Leerlaufen der Vorratsrolle 11 zu erreichen, und damit bis zum Ende des Schreibbetriebes eine hinreichende Bandspannung zu gewährleisten, ist am Träger 3 ein Haken 28 vorgesehen, der mit einem Abschaltnocken 50 an einem zapfenförmigen Fortsatz 49 der Kontrollrolle 6 zusammenwirkt (Fig. 5). Wenn die Vorratsrolle 11 nahezu leer ist, erfasst der Nocken 50 den Haken 28, womit die Kontrollrolle gestoppt wird. Da der Rollenkörper 47 glatt ist, lässt sich auch bei blockierter Kontrollrolle 6 das Band 9 noch etwas weitertransportieren, z. B. um eine Zeile fertig zu schreiben. Dabei ist allerdings das Bremsmoment auf die Vorratsrolle 11 grösser.The control roller 6 has a continuous central bore 51 and is rotatably mounted on a pin 72 fixed to the housing. At the top, it carries a flag 48 on the roller body 47, which is periodically visible in a window 46 of the cover 2 during operation (FIG. 4). The flag 48 enables the tape running control and the automatic shutdown of the typewriter when the flag 48 is stationary during the writing operation, that is to say the supply roll 11 is almost empty. In order to achieve a safe shutdown before the supply roll 11 runs empty, and thus to ensure sufficient tape tension until the end of the writing operation, a hook 28 is provided on the carrier 3, which interacts with a shutdown cam 50 on a peg-shaped extension 49 of the control roll 6 (Fig. 5). When the supply roll 11 is almost empty, the cam 50 catches the hook 28, which stops the control roll. Since the roller body 47 is smooth, the belt 9 can also be transported somewhat further, even when the control roller 6 is blocked, for. B. to finish writing a line. However, the braking torque on the supply roll 11 is greater.

Claims (8)

1. A ribbon cassette with a take-up reel (10) which is movably guided in a housing (1) along a path (70) and is urged by a first spring leg (57) onto a drive roller (5) rotatably mounted in the housing (1), and with a supply reel (11) which is urged by a second spring leg (54) onto a second roller (6) rotatably mounted in the housing (1), characterised in that the take-up reel (10) and supply reel (11) are rotatably mounted on a common support (3), which is guided by means of a pin (26) in the path (70) and is pivotable about the axis of the pin (26) relative to the housing (1).
2. A cassette as claimed in claim 1, characterised'in that the first spring leg (57) acts on the support (3) substantially in the direction of the path (70), and the second spring leg (54) acts on the support (3) in the latter's pivoting direction.
3. A cassette as claimed in claim 1 or 2, characterised in that the second spring leg (54) engages in a groove 34 belonging to a brake sleeve (32) which is rotatably mounted on a pivot (22) connected to the support (3), and which is coupled to the supply reel (11) in respect of 'rotation.
4. A cassette as claimed in any of claims 1 to 3, characterised in that the two spring legs (54, 57) are formed by a one-piece spring (4) secured in the housing (1).
5. A cassette as claimed in any of claims 1 to 4, characterised in that the pin (26) is coaxial with the take-up reel (10) and bears a pin (27) which enters a slot (69) in the housing (1), the slot being parallel to the path (70).
6. A cassette as claimed in claim 5, characterised in that the pin (26) is spaced from a plate (20) belonging to the support (3) and is connected to the plate (20) by a web (25), and the first spring leg (57) bears on this web (25).
7. A cassette as claimed in any of claims 1 to 6, characterised in that the second roller (6) bears at one end a cutout cam (50) in which a hook (28) belonging to the support (3) engages when the supply reel (11) is nearly empty.
8. A cassette as claimed in any of claims 1 to 7, characterised in that the drive roller (5) carries a gearwheel (40) on which the take-up reel (10) bears.
EP85810541A 1984-12-13 1985-11-14 Ink ribbon cartridge, in particular for automatic printers Expired EP0186623B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH593584 1984-12-13
CH5935/84 1984-12-13

Publications (2)

Publication Number Publication Date
EP0186623A1 EP0186623A1 (en) 1986-07-02
EP0186623B1 true EP0186623B1 (en) 1988-04-13

Family

ID=4301756

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85810541A Expired EP0186623B1 (en) 1984-12-13 1985-11-14 Ink ribbon cartridge, in particular for automatic printers

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US (1) US4655623A (en)
EP (1) EP0186623B1 (en)
DE (1) DE3562123D1 (en)

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DE3200268C1 (en) * 1982-01-07 1983-09-29 Siemens AG, 1000 Berlin und 8000 München Transport system for a tape cassette
EP0090164A3 (en) * 1982-03-23 1983-12-14 Franz Büttner AG Winding device for a ribbon cartridge in a printer
JPS591290A (en) * 1982-06-28 1984-01-06 Brother Ind Ltd Ribbon cartridge
IT8353197V0 (en) * 1983-04-13 1983-04-13 Olivetti & Co Spa CARTRIDGE FOR A WRITING TAPE FOR WRITING MACHINES
US4523868A (en) * 1983-07-18 1985-06-18 International Business Machines Corporation Ribbon feed cartridge
JPS6067948U (en) * 1983-10-14 1985-05-14 ブラザー工業株式会社 printing ribbon cassette
JPS6137462A (en) * 1984-07-31 1986-02-22 Silver Seiko Ltd Cassette for printing ribbon

Also Published As

Publication number Publication date
EP0186623A1 (en) 1986-07-02
DE3562123D1 (en) 1988-05-19
US4655623A (en) 1987-04-07

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