EP0447787A2 - Ink ribbon cartridge with rechargeable ink ribbon spools - Google Patents

Ink ribbon cartridge with rechargeable ink ribbon spools Download PDF

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Publication number
EP0447787A2
EP0447787A2 EP91101823A EP91101823A EP0447787A2 EP 0447787 A2 EP0447787 A2 EP 0447787A2 EP 91101823 A EP91101823 A EP 91101823A EP 91101823 A EP91101823 A EP 91101823A EP 0447787 A2 EP0447787 A2 EP 0447787A2
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EP
European Patent Office
Prior art keywords
spool
take
bearing
ink ribbon
core
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.)
Granted
Application number
EP91101823A
Other languages
German (de)
French (fr)
Other versions
EP0447787B1 (en
EP0447787A3 (en
Inventor
Uwe 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.)
OLYMPIA OFFICE VERTRIEBSGESELLSCHAFT MBH
Original Assignee
Olympia Office Vertriebsgesellschaft mbH
AEG Olympia AG
AEG Olympia Office GmbH
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Publication date
Application filed by Olympia Office Vertriebsgesellschaft mbH, AEG Olympia AG, AEG Olympia Office GmbH filed Critical Olympia Office Vertriebsgesellschaft mbH
Publication of EP0447787A2 publication Critical patent/EP0447787A2/en
Publication of EP0447787A3 publication Critical patent/EP0447787A3/en
Application granted granted Critical
Publication of EP0447787B1 publication Critical patent/EP0447787B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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 a ribbon cassette with reloadable ribbon spools of the type specified in the preamble of claim 1.
  • Ribbon cartridges for typewriters or office machines of a similar design are subject to different design requirements, and above all they should be easy to replace by means of one-hand operation. Since they are also designed as disposable parts, it has started to replace the ribbon spools several times before the ribbon cartridges are thrown away.
  • the ribbon cassette has a hinged cover which can be locked and unlocked by means of a hand lever. According to German Offenlegungsschrift 36 23 819, this hand lever is also used to disengage the take-up spool from a spiked roller that can be driven in the cassette.
  • This take-up spool is in this case rotatably mounted on a pivoting lever under spring tension on a bearing axis.
  • the bearing axis for the take-up spool is not arranged perpendicular to the bottom of the cassette. In this way, pushing up the core of the take-up spool on the bearing axis and also crowned winding of the tape winding cannot be avoided. This can even result in the hinged lid being lifted or the ribbon transport being blocked.
  • the invention has for its object to provide a ribbon cassette with reloadable ribbon spools, in which the above-mentioned disadvantages are avoided and in which a safe winding of the ribbon roll is guaranteed until the ribbon is fully used.
  • This object is achieved by the invention characterized in claim 1.
  • FIG. 1 shows a reloadable ink ribbon cassette 1, which consists of a pot-shaped base part 3 and a cover 5 which can be closed at the opening.
  • the cover 5 can in this case be connected in an articulated manner to a side wall 7 of the base part 3 via rotary joints 9, 11 and can be firmly connected to the base part 3 by means of a locking lever 13.
  • This locking lever 13 is pivotable about an axis 15 in the base part 3 and has a control arm 17 which, with a slot-shaped recess 18, engages around a guide surface 19 on a pivot lever 21 in a form-fitting manner.
  • the pivot lever 21 can be acted upon counterclockwise about an axis 23 by means of a spring 57.
  • a take-up spool 27 is rotatably mounted about a bearing axis 25.
  • the outer winding of this take-up coil 27 is with a steel wheel 29 in drive connection, which is mounted rotatably about a bearing axis 31 and is in engagement with a gear 35 of a drive wheel 41 via a gear 33.
  • This drive wheel 41 has a cross-slot-like recess 39, in which a drive element 37 engages in a form-fitting manner.
  • This drive element 37 can be driven in a known manner by a drive motor, not shown.
  • the ink ribbon 47 coming from a supply reel 53 passes through a deflection roller 51 and a deflection edge 49 from the interior of the cassette and is then passed through the printing station again via a deflection edge 45 into the interior of the cassette, from where it then arrives via a deflection roller 43 to the take-up reel 27 .
  • the supply spool 53 is rotatably mounted in the cassette about a bearing axis 55 and is connected to a brake disk 56 in a known manner.
  • the spring 57 is hooked on the one hand with a hooking eye 60 into a hooking 59 in the bottom part 61 and on the other hand with a hooking 62 on a hooking 63 on the pivot lever 21, the spring 57 by means of a support rib 65 around the bearing 64 of the Swivel lever 21 is turned around. This deflection makes it possible to use a long spring with a slightly increasing spring characteristic.
  • FIGS. 2 to 4 show details of the bearing axis 25 and the take-up spool 27.
  • the bearing axis 25 has at its free end a radially protruding locking lug 38, against which a circumferential stop edge 32, which is arranged concentrically with the bearing bore 34 in the core 28 of the take-up spool 27, rests resiliently in the engaged position of the spiked wheel 29 with the unwinding of the take-up spool 27, in such a way that the radial play between the bearing axis 25 and the bearing bore 34 is pushed out and thus a displacement of the take-up spool 27 against the cover 5 is prevented.
  • FIG. 1 shows the change position for the two ribbon spools 27, 53.
  • FIG. 2 shows the mounting of the take-up spool 27 shortly before being attached to the bearing axis 25.
  • the core 28 is pushed onto the bearing axis 25 until the locking lug 38 has reached the stop edge 32, see the broken line in FIG. 3 after unlocking the pivot lever 21 via the hand control lever 13, the tension spring 57 pulls the pivot lever 21 until the core 28 of the take-up spool 27 comes into engagement with the sprocket wheel 29.
  • the radial play between the bearing axis 25 and the bearing bore 34 is pulled out on one side by moving the core 28 in the direction of the arrow 48, so that the locking lug 38 is pushed over the stop edge 32.
  • This prevents the core 28 with the take-up spool 27 from being pushed upwards against the cover 5. This reliably prevents the winding core from slipping up and the ribbon from being wound up soon.
  • the bearing axis 25 is fixedly arranged on the pivot lever 21 and has a flattening below a narrow, cylindrical end section 36 of a length which is somewhat larger than the length of the bearing bore 34 in the core 28 of the take-up spool 27.
  • This flattening is arranged on the side of the bearing axis 25 opposite the pin wheel 29 and enables the core 28 of the take-up spool 27 to be displaced radially.
  • the bearing bore 34 in the core 28 of the take-up spool 27 has a radial recess at its upper end 30 to form the stop edge 32.
  • the recess 30 can also be omitted if the bearing axis is made correspondingly longer.
  • the flattening required for displacement on the bearing axis 25 is formed according to FIGS. 2 and 3 in that the bearing axis 25 below the cylindrical end section 36 has a diameter with a reduced radius on one half
  • the length of the bearing axis 25 with the reduced radius is somewhat larger than the length of the bearing bore 34 in the core 28 and the reduced diameter half 40 is arranged on the side opposite the sprocket wheel 29.
  • the longitudinal edges 44, 46 on the larger diameter halves 42 of the bearing axis 25 are rounded.
  • the cores 28 designed according to the invention ensure that the take-up spool 27 is easily placed on the bearing axles 25, so that after the pivoting lever 21 has been pivoted out of the latching position, the working position of the core 28 of the take-up spool 27 is secured against axial displacement in the simplest way. This ensures trouble-free winding of the ribbon and optimal use of the ribbon.

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Abstract

For reasons of environmental protection, ink ribbon cartridges have hinged lids in order to be able to exchange the ink ribbon spools after use. In this case, it is necessary to disengage the receiving spool mounted rotatably on a swivel lever from a drivable pin wheel. These rechargeable ink ribbon cartridges have the disadvantage that the ink ribbon can only be wound up without interference if the bearing axle for the receiving spool is arranged perpendicular to the bottom plate of the cartridge. If this is not the case, the ink ribbon is wound up in the form of a bale and the receiving spool on the bearing axle is displaced to the extent that the lid rises. These disadvantages are avoided according to the invention due to the fact that the core (28) of the receiving spool (27) is mounted on the bearing axle (25) with radial play and that the bearing axle (25) has at its free end a blocking projection (32) which is constructed radially on one side and against which a circumferential stop edge (32), which is arranged concentrically to the bearing bore (34) in the core (28) of the receiving spool (27), rests resiliently in the engaged position of the pin wheel (29) with the outer coil of the receiving spool (27) in such a way that displacement of the receiving spool (27) against the lid (5) is blocked when the excess radial play has been pressed out between the bearing axle (25) and the bearing bore (34). This reliably guarantees that the ink ribbon is wound up without interference even in the case of small variations in tolerance and inaccuracies in manufacture. <IMAGE>

Description

Die Erfindung betrifft eine Farbbandkassette mit nachladbaren Farbbandspulen der im Oberbegriff des Patentanspruchs 1 angegebenen Art.The invention relates to a ribbon cassette with reloadable ribbon spools of the type specified in the preamble of claim 1.

Farbbandkassetten für Schreib- oder Büromaschinen ähnlicher Bauart unterliegen unterschiedlichen Konstruktionsforderungen, wobei sie vor allen Dingen mittels einer Einhandbedienung leicht austauschbar sein sollen. Da sie darüberhinaus als Wegwerfteile konzipiert sind, ist man dazu übergegangen, die Farbbandspulen mehrfach auszutauschen, bevor die Farbbandkassetten weggeworfen werden. Zu diesem Zweck weist die Farbbandkassette einen aufklappbaren Deckel auf, der mittels eines Handstellhebels ver- und entriegelbar ist. Dieser Handstellhebel dient gemäß der deutschen Offenlegungsschrift 36 23 819 gleichzeitig auch dazu, die Aufnahmespule mit einer in der Kassette antreibbar angeordneten Stachelwalze wieder außer Eingriff zu bringen. Diese Aufnahmespule ist hierbei auf einem unter Federspannung stehenden Schwenkhebel auf einer Lagerachse drehbar gelagert. Aufgrund von Fertigungstoleranzen ist es leicht möglich, daß die Lagerachse für die Aufnahmespule nicht senkrecht zum Boden der Kassette angeordnet ist. Hierdurch läßt sich ein Hochschieben des Kernes der Aufnahmespule auf der Lagerachse und auch ein balliges Aufwickeln des Bandwickels nicht vermeiden. Dieses kann sogar dazu führen, daß der aufklappbare Deckel hierbei angehoben oder auch der Farbbandtransport blockiert wird.Ribbon cartridges for typewriters or office machines of a similar design are subject to different design requirements, and above all they should be easy to replace by means of one-hand operation. Since they are also designed as disposable parts, it has started to replace the ribbon spools several times before the ribbon cartridges are thrown away. For this purpose, the ribbon cassette has a hinged cover which can be locked and unlocked by means of a hand lever. According to German Offenlegungsschrift 36 23 819, this hand lever is also used to disengage the take-up spool from a spiked roller that can be driven in the cassette. This take-up spool is in this case rotatably mounted on a pivoting lever under spring tension on a bearing axis. Due to manufacturing tolerances, it is easily possible that the bearing axis for the take-up spool is not arranged perpendicular to the bottom of the cassette. In this way, pushing up the core of the take-up spool on the bearing axis and also crowned winding of the tape winding cannot be avoided. This can even result in the hinged lid being lifted or the ribbon transport being blocked.

Der Erfindung liegt die Aufgabe zugrunde, eine Farbbandkassette mit nachladbaren Farbbandspulen zu schaffen, bei der die oben genannten Nachteile vermieden werden und bei der ein sicheres Aufwickeln des Bandwickels bis zur vollen Ausnutzung des Farbbandes gewährleistet wird. Diese Aufgabe wird durch die im Patentanspruch 1 gekennzeichnete Erfindung gelöst.The invention has for its object to provide a ribbon cassette with reloadable ribbon spools, in which the above-mentioned disadvantages are avoided and in which a safe winding of the ribbon roll is guaranteed until the ribbon is fully used. This object is achieved by the invention characterized in claim 1.

Durch kleine konstruktive Änderungen der Lagerachse und der Lagerbohrung in der Aufnahmespule wird eine Sperre geschaffen, die ein Aufschieben des Farbbandes gegen den Aufklappdeckel beim Aufwickelvorgang des Farbbandes sicher verhindert. Hierdurch wird auch eine optimale Ausnutzung des Farbbandes ohne Störungen während des Aufwickelvorganges ermöglicht.Small design changes to the bearing axis and the bearing bore in the take-up spool create a lock that reliably prevents the ink ribbon from being pushed against the hinged lid during the winding operation of the ink ribbon. This also enables optimal use of the ribbon without interference during the winding process.

Weitere vorteilhafte Ausgestaltungen des Erfindungsgegenstandes sind den weiteren Unteransprüchen zu entnehmen.Further advantageous refinements of the subject matter of the invention can be found in the further subclaims.

Die Erfindung wird anhand eines Ausführungsbeispiels im folgenden näher beschrieben. Es zeigen:

Figur 1
eine Einsicht in eine gefüllte Farbbandkassette,
Figur 2
eine Aufnahmespule vor dem Aufsetzen auf einer Lagerachse,
Figur 3
Aufnahmespule in gerasteter Stellung und
Figur 4
eine Einzelheit aus den Figuren 2 und 3.
The invention is described in more detail below using an exemplary embodiment. Show it:
Figure 1
an insight into a filled ribbon cassette,
Figure 2
a take-up spool before it is placed on a bearing axis,
Figure 3
Reel in the locked position and
Figure 4
a detail from Figures 2 and 3.

Die Figur 1 zeigt eine nachladbare Farbbandkassette 1, die aus einem topfförmigen Bodenteil 3 und einem dessen Öffnung verschließbaren Deckel 5 besteht. Der Deckel 5 kann hierbei mit einer Seitenwand 7 des Bodenteils 3 über Drehgelenke 9, 11 gelenkig verbunden sein und ist mittels eines Rasthebels 13 mit dem Bodenteil 3 fest verbindbar. Dieser Rasthebel 13 ist um eine Achse 15 im Bodenteil 3 verschwenkbar und weist einen Steuerarm 17 auf, der mit einer schlitzförmigen Ausnehmung 18 eine Führungsfläche 19 an einem Schwenkhebel 21 formschlüssig umgreift. Der Schwenkhebel 21 ist um eine Achse 23 mittels einer Feder 57 im Gegenuhrzeigersinn beaufschlagbar. Auf dem freien Ende des Schwenkhebels 21 ist eine Aufnahmespule 27 um eine Lagerachse 25 drehbar gelagert. Der Außenwickel dieser Aufnahmespule 27 steht mit einem Stahlrad 29 in Antriebsverbindung, der um eine Lagerachse 31 verdrehbar gelagert ist und über ein Zahnrad 33 mit einem Zahnrad 35 eines Antriebsrades 41 in Eingriff steht. Dieses Antriebsrad 41 weist eine kreuzschlitzartige Ausnehmung 39 auf, in die ein Antriebselement 37 formschlüssig eingreift. Dieses Antriebselement 37 ist durch einen nicht dargestellten Antriebsmotor in bekannter Weise antreibbar.FIG. 1 shows a reloadable ink ribbon cassette 1, which consists of a pot-shaped base part 3 and a cover 5 which can be closed at the opening. The cover 5 can in this case be connected in an articulated manner to a side wall 7 of the base part 3 via rotary joints 9, 11 and can be firmly connected to the base part 3 by means of a locking lever 13. This locking lever 13 is pivotable about an axis 15 in the base part 3 and has a control arm 17 which, with a slot-shaped recess 18, engages around a guide surface 19 on a pivot lever 21 in a form-fitting manner. The pivot lever 21 can be acted upon counterclockwise about an axis 23 by means of a spring 57. On the free end of the pivot lever 21, a take-up spool 27 is rotatably mounted about a bearing axis 25. The outer winding of this take-up coil 27 is with a steel wheel 29 in drive connection, which is mounted rotatably about a bearing axis 31 and is in engagement with a gear 35 of a drive wheel 41 via a gear 33. This drive wheel 41 has a cross-slot-like recess 39, in which a drive element 37 engages in a form-fitting manner. This drive element 37 can be driven in a known manner by a drive motor, not shown.

Das von einer Vorratsspule 53 kommende Farbband 47 gelangt über eine Umlenkrolle 51 und eine Umlenkkante 49 aus dem Kassetteninneren und wird dann nach Durchlauf der Druckstation wieder über eine Umlenkkante 45 in das Kassetteninnere geleitet, von wo es dann über eine Umlenkrolle 43 zu der Aufnahmespule 27 gelangt. Die Vorratsspule 53 ist um eine Lagerachse 55 in der Kassette verdrehbar gelagert und ist mit einer Bremsscheibe 56 in bekannter Weise verbunden.The ink ribbon 47 coming from a supply reel 53 passes through a deflection roller 51 and a deflection edge 49 from the interior of the cassette and is then passed through the printing station again via a deflection edge 45 into the interior of the cassette, from where it then arrives via a deflection roller 43 to the take-up reel 27 . The supply spool 53 is rotatably mounted in the cassette about a bearing axis 55 and is connected to a brake disk 56 in a known manner.

Die Feder 57 ist einerseits mit einer Einhängeöse 60 in eine Einhängung 59 in dem Bodenteil 61 und andererseits an dem anderen Ende mit einer Einhängung 62 an einer Einhängung 63 an dem Schwenkhebel 21 eingehängt, wobei die Feder 57 mittels einer Stützrippe 65 um das Lager 64 des Schwenkhebels 21 herumgelenkt wird. Durch diese Umlenkung ist es möglich, eine lange Feder mit einer gering ansteigenden Federkennlinie einzusetzen.The spring 57 is hooked on the one hand with a hooking eye 60 into a hooking 59 in the bottom part 61 and on the other hand with a hooking 62 on a hooking 63 on the pivot lever 21, the spring 57 by means of a support rib 65 around the bearing 64 of the Swivel lever 21 is turned around. This deflection makes it possible to use a long spring with a slightly increasing spring characteristic.

In den Figuren 2 bis 4 sind Einzelheiten der Lagerachse 25 und der Aufnahmespule 27 dargestellt. Die Lagerachse 25 weist an ihrem freien Ende eine einseitig radial vorstehende Sperrnase 38 auf, gegen welche eine konzentrisch zu der Lagerbohrung 34 in dem Kern 28 der Aufnahmespule 27 angeordnete, umlaufende Anschlagkante 32 in Eingriffstellung des Stachelrades 29 mit dem Auswickeln der Aufnahmespule 27 federnd anliegt, derart, daß das Radialspiel zwischen der Lagerachse 25 und der Lagerbohrung 34 herausgedrückt und damit ein Verschieben der Aufnahmespule 27 gegen den Deckel 5 verhindert wird. Die gestrichelte Darstellung des Schwenkhebels 21 in der Figur 1 zeigt die Wechselstellung für die beiden Farbbandspulen 27, 53 auf. Die Figur 2 zeigt das Aufsetzen der Aufnahmespule 27 kurz vor dem Aufstecken auf die Lagerachse 25. Der Kern 28 wird hierbei so weit auf die Lagerachse 25 aufgeschoben, bis die Sperrnase 38 oberhalb der Anschlagkante 32 gelangt ist, siehe gestrichelte Darstellung in Figur 3. Nach dem Entriegeln des Schwenkhebels 21 über den Handstellhebel 13 zieht die Zugfeder 57 den Schwenkhebel 21 so weit, bis der Kern 28 der Aufnahmespule 27 mit dem Stachelrad 29 in Eingriff gelangt. Hierbei wird das Radialspiel zwischen der Lagerachse 25 und der Lagerbohrung 34 durch Verschieben des Kernes 28 in Pfeilrichtung 48 einseitig herausgezogen, so daß die Sperrnase 38 über die Anschlagkante 32 geschoben wird. Hierdurch wird verhindert, daß der Kern 28 mit der Aufnahmespule 27 nach oben gegen den Deckel 5 geschoben werden kann. Hierdurch wird eine Hochrutschen des Aufwickelkernes und ein damit verbundenes baldiges Aufwickeln des Farbbandes sicher verhindert.FIGS. 2 to 4 show details of the bearing axis 25 and the take-up spool 27. The bearing axis 25 has at its free end a radially protruding locking lug 38, against which a circumferential stop edge 32, which is arranged concentrically with the bearing bore 34 in the core 28 of the take-up spool 27, rests resiliently in the engaged position of the spiked wheel 29 with the unwinding of the take-up spool 27, in such a way that the radial play between the bearing axis 25 and the bearing bore 34 is pushed out and thus a displacement of the take-up spool 27 against the cover 5 is prevented. The broken line of the swivel lever 21 in FIG. 1 shows the change position for the two ribbon spools 27, 53. FIG. 2 shows the mounting of the take-up spool 27 shortly before being attached to the bearing axis 25. The core 28 is pushed onto the bearing axis 25 until the locking lug 38 has reached the stop edge 32, see the broken line in FIG. 3 after unlocking the pivot lever 21 via the hand control lever 13, the tension spring 57 pulls the pivot lever 21 until the core 28 of the take-up spool 27 comes into engagement with the sprocket wheel 29. Here, the radial play between the bearing axis 25 and the bearing bore 34 is pulled out on one side by moving the core 28 in the direction of the arrow 48, so that the locking lug 38 is pushed over the stop edge 32. This prevents the core 28 with the take-up spool 27 from being pushed upwards against the cover 5. This reliably prevents the winding core from slipping up and the ribbon from being wound up soon.

Die Lagerachse 25 ist übrigens fest auf dem Schwenkhebel 21 angeordnet und weist unterhalb eines schmalen, zylindrisch ausgebildeten Endabschnittes 36 eine Abflachung von einer Länge auf, die etwas größer als die Länge der Lagerbohrung 34 in dem Kern 28 der Aufnahmespule 27 ist. Diese Abflachung ist an der dem Stachelrad 29 gegenüberliegenden Seite der Lagerachse 25 angeordnet und ermöglicht ein radiales Verschieben des Kernes 28 der Aufnahmespule 27. Gemäß den Figuren 2 und 3 weist die Lagerbohrung 34 in dem Kern 28 der Aufnahmespule 27 an ihrem oberen Ende einen radialen Einstich 30 zur Bildung der Anschlagkante 32 auf. Im Rahmen der Erfindung kann der Einstich 30 auch entfallen, wenn die Lagerachse entsprechend länger ausgebildet wird.Incidentally, the bearing axis 25 is fixedly arranged on the pivot lever 21 and has a flattening below a narrow, cylindrical end section 36 of a length which is somewhat larger than the length of the bearing bore 34 in the core 28 of the take-up spool 27. This flattening is arranged on the side of the bearing axis 25 opposite the pin wheel 29 and enables the core 28 of the take-up spool 27 to be displaced radially. According to FIGS. 2 and 3, the bearing bore 34 in the core 28 of the take-up spool 27 has a radial recess at its upper end 30 to form the stop edge 32. In the context of the invention, the recess 30 can also be omitted if the bearing axis is made correspondingly longer.

Die zum Verschieben erforderliche Abflachung an der Lagerachse 25 wird gemäß den Figuren 2 und 3 dadurch gebildet, daß die Lagerachse 25 unterhalb des zylindrischen Endabschnittes 36 auf der einen Hälfte einen Durchmesser mit einem verkleinerten Radius aufweist, wobei die Länge der Lagerachse 25 mit dem verkleinerten Radius etwas größer als die Länge der Lagerbohrung 34 in dem Kern 28 ist und wobei die verkleinerte Durchmesserhälfte 40 an der dem Stachelrad 29 gegenüberliegenden Seite angeordnet ist. Die Längskanten 44, 46 an der größeren Durchmesserhälte 42 der Lagerachse 25 weisen Abrundungen auf.The flattening required for displacement on the bearing axis 25 is formed according to FIGS. 2 and 3 in that the bearing axis 25 below the cylindrical end section 36 has a diameter with a reduced radius on one half The length of the bearing axis 25 with the reduced radius is somewhat larger than the length of the bearing bore 34 in the core 28 and the reduced diameter half 40 is arranged on the side opposite the sprocket wheel 29. The longitudinal edges 44, 46 on the larger diameter halves 42 of the bearing axis 25 are rounded.

Die erfindungsgemäß gestalteten Kerne 28 gewährleisten ein leichtes Aufsetzen der Aufnahmespule 27 auf die Lagerachsen 25, wodurch nach dem Verschwenken des Schwenkhebels 21 aus der Rastin die Arbeitsstellung der Kern 28 der Aufnahmespule 27 gegen axiale Verschiebung auf einfachste Weise gesichert wird. Hierdurch werden ein störungsfreies Aufwickeln des Farbbandes und eine optimale Ausnutzung des Farbbandes gewährleistet.The cores 28 designed according to the invention ensure that the take-up spool 27 is easily placed on the bearing axles 25, so that after the pivoting lever 21 has been pivoted out of the latching position, the working position of the core 28 of the take-up spool 27 is secured against axial displacement in the simplest way. This ensures trouble-free winding of the ribbon and optimal use of the ribbon.

Claims (5)

Farbbandkassette mit nachladbaren Farbbandspulen, von denen eine Zuführspule zum Abwickeln und eine Aufnahmespule zum Aufwickeln des Farbbandes auf Lagerachsen in der Kassette drehbar gelagert sind, wobei die Lagerachse für die Aufnahmespule auf einem Schwenkhebel angeordnet ist, welcher durch eine Zugfeder derart beaufschlagt wird, daß der Außenwickel der Aufnahmespule mit einem in der Kassette antreibbar gelagerten Stachelrad stets sicher in Eingriff gehalten wird, dadurch gekennzeichnet, daß der Kern (28) der Aufnahmespule (27) mit Radialspiel auf der Lagerachse (25) gelagert ist und daß die Lagerachse (25) an ihrem freien Ende eine einseitig radial ausgebildete Sperrnase (38) aufweist, gegen welche eine konzentrisch zu der Lagerbohrung (34) in dem Kern (28) der Aufnahmespule (27) angeordnete, umlaufende Anschlagkante (32) in Eingriffstellung des Stachelrades (29) mit dem Außenwickel der Aufnahmespule (27) federnd anliegt, derart, daß nach dem Herausdrücken der Lose des Radialspiels zwischen der Lagerachse (25) und der Lagerbohrung (34) ein Verschieben der Aufnahmespule (27) gegen den Deckel (5) gesperrt wird.Ribbon cassette with reloadable ribbon spools, of which a feed spool for unwinding and a take-up spool for winding the ribbon are rotatably mounted on bearing axles in the cassette, the bearing axis for the take-up spool being arranged on a pivot lever which is acted upon by a tension spring in such a way that the outer winding the take-up spool is always securely engaged with a spiked wheel which can be driven in the cassette, characterized in that the core (28) of the take-up spool (27) is mounted with radial play on the bearing shaft (25) and that the bearing shaft (25) is on it Free end has a locking lug (38) which is formed radially on one side and against which a circumferential stop edge (32) arranged concentrically with the bearing bore (34) in the core (28) of the take-up spool (27) in the engaged position of the sprocket wheel (29) with the outer winding the take-up spool (27) rests resiliently, such that after pressing out the lots of Ra dialspiels between the bearing axis (25) and the bearing bore (34) moving the take-up spool (27) against the cover (5) is blocked. Farbbandkassette nach Anspruch 1, dadurch gekennzeichnet, daß die Lagerachse (25) fest auf dem Schwenkhebel (21) angeordnet ist und unterhalb eines schmalen zylindrischen Endabschnittes (36) eine Abflachung von einer Länge aufweist, die etwas größer als die Länge der Lagerbohrung (34) in dem Kern (28) der Aufnahmespule (27) ist, und daß die Abflachung an der dem Stachelrad (29) gegenüberliegenden Seite der Lagerachse (25) angeordnet ist.Ribbon cassette according to claim 1, characterized in that the bearing axis (25) is fixedly arranged on the swivel lever (21) and below a narrow cylindrical end section (36) has a flattening of a length which is somewhat larger than the length of the bearing bore (34). is in the core (28) of the take-up spool (27), and that the flattened portion is arranged on the side of the bearing axis (25) opposite the sprocket wheel (29). Farbbandkassette nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Lagerbohrung (34) in dem Kern (28) der Aufnahmespule (27) an ihrem oberen Ende einen radialen Einstich (30) zur Bildung der Anschlagkante (32) aufweist.Ribbon cassette according to claim 1 or 2, characterized in that the bearing bore (34) in the core (28) of the take-up spool (27) has at its upper end a radial recess (30) to form the stop edge (32). Farbbandkassette nach Anspruch 1, dadurch gekennzeichnet, daß die Lagerachse (25) unterhalb eines schmalen, zylindrisch ausgebildeten Endabschnittes (36) auf der einen Durchmesserhälfte (40) einen Durchmesser mit einem verkleinerten Radius aufweist, daß die Länge der Lagerachse (25) mit der verkleinerten Durchmesserhälfte (40) etwas größer als die Länge der Lagerbohrung (34) in dem Kern (28) der Aufnahmespule (27) ist und daß die verkleinerte Durchmesserhälfte (40) an der dem Stachelrad (29) gegenüberliegenden Seite angeordnet ist.Ribbon cassette according to claim 1, characterized in that the bearing axis (25) below a narrow, cylindrical end section (36) on one half of the diameter (40) has a diameter with a reduced radius such that the length of the bearing axis (25) with the reduced Half diameter (40) is slightly larger than the length of the bearing bore (34) in the core (28) of the take-up spool (27) and that the reduced diameter half (40) is arranged on the side opposite the sprocket wheel (29). Farbbandkassette nach Anspruch 4, dadurch gekennzeichnet, daß die Längskanten (44, 46) an der größeren Durchmesserhälfte (42) der Lagerachse (25) je eine Abrundung aufweisen.Ribbon cassette according to claim 4, characterized in that the longitudinal edges (44, 46) each have a rounding on the larger diameter half (42) of the bearing axis (25).
EP91101823A 1990-03-21 1991-02-09 Ink ribbon cartridge with rechargeable ink ribbon spools Expired - Lifetime EP0447787B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4009056A DE4009056A1 (en) 1990-03-21 1990-03-21 RIBBON CASSETTE WITH RECHARGEABLE RIBBON REELS
DE4009056 1990-03-21

Publications (3)

Publication Number Publication Date
EP0447787A2 true EP0447787A2 (en) 1991-09-25
EP0447787A3 EP0447787A3 (en) 1991-11-06
EP0447787B1 EP0447787B1 (en) 1995-05-17

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ID=6402723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101823A Expired - Lifetime EP0447787B1 (en) 1990-03-21 1991-02-09 Ink ribbon cartridge with rechargeable ink ribbon spools

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EP (1) EP0447787B1 (en)
DE (2) DE4009056A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984000725A1 (en) * 1982-08-20 1984-03-01 Facit Ab Device for displaceably and rotatably mounting a roller on a shaft
DE8700080U1 (en) * 1987-01-02 1987-02-19 Regentrop & Bernard GmbH, 5600 Wuppertal Ribbon cassette with transmission or reduction gear
DE3737657A1 (en) * 1987-11-06 1989-05-18 Olympia Aeg Reloadable ink-ribbon cartridge for typewriters or office machines of similar design

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984000725A1 (en) * 1982-08-20 1984-03-01 Facit Ab Device for displaceably and rotatably mounting a roller on a shaft
DE8700080U1 (en) * 1987-01-02 1987-02-19 Regentrop & Bernard GmbH, 5600 Wuppertal Ribbon cassette with transmission or reduction gear
DE3737657A1 (en) * 1987-11-06 1989-05-18 Olympia Aeg Reloadable ink-ribbon cartridge for typewriters or office machines of similar design

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, Band 26, Nr. 1, Juni 1983, Seiten 299-300, New York, US; G.L. GREENLIEF et al.: "Cartridge with ribbon and correction tape guide" *

Also Published As

Publication number Publication date
EP0447787B1 (en) 1995-05-17
EP0447787A3 (en) 1991-11-06
DE59105484D1 (en) 1995-06-22
DE4009056A1 (en) 1991-09-26

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