EP0447786A2 - Cassette à ruban encreur avec bobines à ruban encreur rechargeables - Google Patents

Cassette à ruban encreur avec bobines à ruban encreur rechargeables Download PDF

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Publication number
EP0447786A2
EP0447786A2 EP91101822A EP91101822A EP0447786A2 EP 0447786 A2 EP0447786 A2 EP 0447786A2 EP 91101822 A EP91101822 A EP 91101822A EP 91101822 A EP91101822 A EP 91101822A EP 0447786 A2 EP0447786 A2 EP 0447786A2
Authority
EP
European Patent Office
Prior art keywords
bearing
lever
ribbon
tension spring
spool
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Withdrawn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
EP91101822A
Other languages
German (de)
English (en)
Other versions
EP0447786A3 (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.)
AEG Olympia Office GmbH
Original Assignee
AEG Olympia AG
AEG Olympia Office 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 AEG Olympia AG, AEG Olympia Office GmbH filed Critical AEG Olympia AG
Publication of EP0447786A2 publication Critical patent/EP0447786A2/fr
Publication of EP0447786A3 publication Critical patent/EP0447786A3/de
Withdrawn legal-status Critical Current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
    • 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.
  • 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 rotatably mounted on a pivoted lever under spring tension.
  • the disadvantage here is that the spring force of the tension spring increases with the pivoting of the pivot lever and thus with increasing length.
  • the invention has for its object to provide a ribbon cassette with reloadable ribbon spools, in which the spring loading the pivot lever with the rotatably mounted take-up spool has only a slightly rising spring core line, such that the spring force when pivoting the pivot lever into the latching position is only slight Dimensions increases.
  • 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 spool 27 is in drive connection with a spike wheel 29, which is rotatably mounted about a bearing axis 31 and via a toothed wheel 33 a gear 35 of a drive wheel 41 is engaged.
  • 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 pivoting lever 21 can be pivoted by means of the locking lever 13 from the extended into the broken line according to FIG. 1.
  • the swivel lever 21 also reaches this dashed representation when the supply spool 53 is unwound and the ink ribbon is wound onto the take-up spool.
  • the tension spring 57 acting on the pivoting lever 21 has only a slightly increasing spring characteristic.
  • the deflection 65 is formed by a support rib, the starting edge of which is in the vicinity of the attachment point 63 between this (63) and the bearing 64 and which is formed by reducing the distance to the bearing 64 in such a way that the spring 57 when the pivoting lever 21 is given away its rest position for changing the ribbon spools 53, 27 is only slightly elongated.
  • the support rib 65 has in its initial area up to an angle of approximately 90 ° an annular support surface 66, which is concentric with the bearing 64 and for the initial turns of the tension spring 57, which then rounds off 68 into a tangentially tapering end toward the bearing 64 Section surface 70 passes.
  • this section surface 70 lies opposite the remaining windings at the other end of the tension spring 57 at a short distance. This ensures a clean pulling apart of the spring 57 when the pivoting lever 21 is pivoted into the detent position.
  • This design of the deflection 65 also keeps the friction between the support surface 66 and the turns of the tension spring 57 low, so that the force to be used by the operator for pivoting the pivot lever 21 into the latched position is not particularly increased.
  • the pivot lever 21 with the cylindrical bearing 64 and the support rib 65 consists of a die-cast part.

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  • Impression-Transfer Materials And Handling Thereof (AREA)
EP19910101822 1990-03-21 1991-02-09 Ink ribbon cartridge with rechargeable ink ribbon spools Withdrawn EP0447786A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4009057 1990-03-21
DE19904009057 DE4009057A1 (de) 1990-03-21 1990-03-21 Farbbandkassette mit nachladbaren farbbandspulen

Publications (2)

Publication Number Publication Date
EP0447786A2 true EP0447786A2 (fr) 1991-09-25
EP0447786A3 EP0447786A3 (en) 1991-11-06

Family

ID=6402724

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910101822 Withdrawn EP0447786A3 (en) 1990-03-21 1991-02-09 Ink ribbon cartridge with rechargeable ink ribbon spools

Country Status (2)

Country Link
EP (1) EP0447786A3 (fr)
DE (1) DE4009057A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0629509A3 (fr) * 1993-06-15 1995-07-05 Brother Ind Ltd Cassette pour ruban.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3311280A (en) * 1965-05-03 1967-03-28 Ibm Magnetic tape transport machine
DE2251982C3 (de) * 1971-10-21 1981-08-13 Ing. C. Olivetti & C., S.p.A., 10015 Ivrea, Torino Abnehmabre Kassette für das Farbband einer Rechenmaschine
DE3737657A1 (de) * 1987-11-06 1989-05-18 Olympia Aeg Nachladbare farbbandkassette fuer schreib- oder bueromaschinen aehnlicher bauart
DE3919119A1 (de) * 1989-06-12 1990-12-13 Olympia Aeg Farbbandkassette mit auswechselbaren farbbandspulen fuer schreib- oder bueromaschinen aehnlicher bauart

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0629509A3 (fr) * 1993-06-15 1995-07-05 Brother Ind Ltd Cassette pour ruban.
US5492282A (en) * 1993-06-15 1996-02-20 Brother Kogyo Kabushiki Kaisha Refillable tape cassettes of varying thicknesses with unique spool mounting structures

Also Published As

Publication number Publication date
EP0447786A3 (en) 1991-11-06
DE4009057A1 (de) 1991-09-26

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