EP0094904B1 - Farbbandende-Detektor für Schreibmaschinen - Google Patents

Farbbandende-Detektor für Schreibmaschinen Download PDF

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Publication number
EP0094904B1
EP0094904B1 EP83810162A EP83810162A EP0094904B1 EP 0094904 B1 EP0094904 B1 EP 0094904B1 EP 83810162 A EP83810162 A EP 83810162A EP 83810162 A EP83810162 A EP 83810162A EP 0094904 B1 EP0094904 B1 EP 0094904B1
Authority
EP
European Patent Office
Prior art keywords
ribbon
light
flow
cassette
detector
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
EP83810162A
Other languages
English (en)
French (fr)
Other versions
EP0094904A1 (de
Inventor
Errick Guillaume
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.)
Hermes Precisa International SA
Original Assignee
Hermes Precisa International SA
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 Hermes Precisa International SA filed Critical Hermes Precisa International SA
Publication of EP0094904A1 publication Critical patent/EP0094904A1/de
Application granted granted Critical
Publication of EP0094904B1 publication Critical patent/EP0094904B1/de
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
    • B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
    • B41J35/36—Alarms, indicators, or feed disabling devices responsive to ink ribbon breakage or exhaustion

Definitions

  • the present invention relates to a device for detecting the end of the ribbon for typewriters, having a cassette consisting of a housing containing a supply reel on which the ribbon is wound and a take-up reel intended to cooperate with drive means and intended to receiving the ribbon used, the device comprising an optical reader comprising a light source for illuminating a portion of said ribbon and a detector for detecting the light flux coming from this portion of ribbon.
  • Modern typewriters frequently have a memory for storing texts. Printing of the stored texts is then carried out automatically without the intervention of an operator. When the printing ribbon of such a machine comes to an end during the printing of a stored text, it is necessary that the printing operation is stopped automatically and that the operator is informed that a cassette change must be made.
  • some machines include an optical reader intended to detect the end of the printing ribbon, for example US-A-4,115,013.
  • This reader generally comprises a light source and a photoelectric detector placed facing the source.
  • This installation operation requires special care and it sometimes happens that the elements of the optical drive are damaged when the ribbon is changed.
  • the present invention aims to remedy these drawbacks and comprises, for this purpose, a cassette comprising a member conducting the light flux coming from one piece with the housing, this member being intended to bring the light flux coming from said lit portion tape to the detector.
  • the cassette according to the invention facilitates the positioning of the ribbon.
  • the ribbon cassette comprises a housing 1 comprising a cover 3 which fits onto a bottom 2, a supply reel 4 on which a printing ribbon 6 is wound and a take-up reel 5 around which the used ribbon is wound.
  • the supply reel 4 is superimposed coaxially with the take-up reel 5, which is rotated by drive means 7 external to the cassette.
  • the supply reel 4 has braking means for producing a certain tension in the printing ribbon 6.
  • These braking means consist of a spring steel wire 8 comprising a braking loop 31 acting on the hub 12 of the supply coil 4, of one end 9 anchored in the housing, of one end 10 comprising a spout 11
  • the printing ribbon 6 forms a loop passing around the folded end 10 of the steel wire 8 guided in height by the spout 11 before being driven on the guide 13 and through the optical reader 14.
  • the optical reader 14 intended to detect the end of the ribbon 6 comprises a light source 15, an optoelectronic detector 16 and a light-conducting member 17.
  • the source 15 and the detector 16 are fixed to the typewriter, while the member 17 came in one piece with the bottom 2 of the casing 3 of the cassette.
  • This body is constituted by two light guides 18 and 19 of prismatic shape.
  • the upper ends of the two guides have two faces oriented substantially at 45 ° to the axis of the guides so as to reflect the light from one of the guides to the other.
  • the printing ribbon 6 passes between the two upper faces of the light guides 18 and 19. It is normally opaque, but has a transparent termination. When this termination reaches the optical reader 17, the light flux coming from the source 15 is transmitted by the ribbon and the other guide 19 to reach the optoelectronic detector 16.
  • the latter then emits a signal, capable of acting, after adequate amplification, on the one hand on a switch not shown for stopping printing and on the other hand on an optical or sound signaling device, not shown.
  • the housing 1 has two extensions 20 and 21, the ends of which are open and include guide pieces 22 and 23.
  • the portion of tape 6 located outside the housing 1 between the guide pieces 22 and 23 is intended to be engaged in a fork and a ribbon guide, not shown, of a typewriter intended to receive the cassette.
  • the ribbon then passes over a guide piece 24 and is wound on the take-up reel 5.
  • the cassette has a blocking member 25 of the take-up reel 5 intended to prevent the unwinding of the latter when the cassette is removed from the machine. to write.
  • This member is constituted by a lever 26 comprising a spout 27 intended to engage between the teeth 28 of a toothed wheel 29 angularly integral with the take-up reel 5.
  • the lever 26 is made of an elastic material, for example a synthetic resin , and came in one piece with the bottom 2 of the housing 1. It is arranged so as to press its beak 27 in a flexible manner against the toothing 28.
  • a piece 30 secured to the cassette fixing mechanism, not illustrated, makes it possible to separate the spout 27 from the toothing 28 against the action of the elastic force exerted by the lever 26.
  • the light conducting member 17 could be produced by two curved light guides of circular section, two of the ends of the two guides being arranged opposite one another and the two other ends being arranged opposite the light source, respectively from the detector.

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  • Impression-Transfer Materials And Handling Thereof (AREA)

Claims (3)

1. Vorrichtung zur Ermittlung des Farbbandendes für Schreibmaschinen, welche eine Kassette aufweisen, die aus einem Gehäuse besteht, das eine Abwickelspule, auf der das Farbband aufgerollt ist, und eine mit Antriebsmitteln zusammenarbeitende und zur Aufnahme des gebrauchten Bandes dienende Aufwickelspule enthält, wobei die Vorrichtung einen optischen Ableser aufweist, der aus einer Lichtquelle zur Belichtung eines Teilstücks des Bandes und einem Detektor zur Aufnahme des von dem Bandteilstück kommenden Lichtstromes besteht, dadurch gekennzeichnet, dass die Kassette ein Lichtstrom leitendes Organ (17) aufweist, das aus einem Stück mit dem Gehäuse (1) gebildet ist, wobei dieses Organ dazu dient, den von dem benannten belichteten Teilstück des Bandes (6) kommenden Lichtstrom zum Detektor (16) zu leiten.
2. Vorrichtung gemäss Anspruch 1, dadurch gekennzeichnet, dass das benannte Organ (17) aus zwei Lichtleitern (18, 19) besteht, die aus einem Stück mit dem Gehäuse (1) gebildet sind, wobei der eine (18) so angeordnet ist, dass er den von der Lichtquelle (15) ausgestrahlten Lichtstrom zum Band (6) führt, und der andere (19) so angeordnet ist, dass er den durch das Band gedrungene Lichtstrom zum Detektor (16) führt.
3. Vorrichtung gemäss Anspruch 2, dadurch gekennzeichnet, dass die zwei Lichtleiter (18, 19) von zwei parallelen prismatischen Körpern gebildet werden, welche an ihren oberen Enden zwei Flächen aufweisen, die zur Achse der benannten Körper unter einen Winkel von merklich 45° in der Weise geneigt sind, dass das Licht von einem Körper (18) zum anderen (19) reflektiert wird, wobei das benannte Band (6) zwischen diesen beiden Flächen durchläuft.
EP83810162A 1982-05-14 1983-04-18 Farbbandende-Detektor für Schreibmaschinen Expired EP0094904B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3005/82 1982-05-14
CH3005/82A CH647982A5 (fr) 1982-05-14 1982-05-14 Cassette pour machine a ecrire comportant un dispositif de detection de la fin du ruban.

Publications (2)

Publication Number Publication Date
EP0094904A1 EP0094904A1 (de) 1983-11-23
EP0094904B1 true EP0094904B1 (de) 1985-10-30

Family

ID=4246486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83810162A Expired EP0094904B1 (de) 1982-05-14 1983-04-18 Farbbandende-Detektor für Schreibmaschinen

Country Status (5)

Country Link
US (1) US4492483A (de)
EP (1) EP0094904B1 (de)
JP (1) JPS58205790A (de)
CH (1) CH647982A5 (de)
DE (1) DE3361103D1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2146000B (en) * 1983-07-23 1988-10-12 Ricoh Kk Printer and cassette
JPS6067948U (ja) * 1983-10-14 1985-05-14 ブラザー工業株式会社 印字リボンカセツト
EP0147911B1 (de) * 1983-12-01 1989-08-30 Unisys Corporation Selbstbremsender Bandtransportapparat
US4669899A (en) * 1984-12-26 1987-06-02 Ricoh Company, Ltd. Ink ribbon cartridge and color ink ribbon for printer
DE3517129C1 (de) * 1985-05-11 1986-11-20 TA Triumph-Adler AG, 8500 Nürnberg Farbbandkassette für Schreib- und ähnliche Maschinen sowie Vorrichtung zum Betreiben der Farbbandkassette
JPH0222090A (ja) * 1988-07-12 1990-01-24 Matsushita Electric Ind Co Ltd 印字装置
GB9212004D0 (en) * 1992-06-05 1992-07-15 Esselte Dymo Nv Printing apparatus
US5474393A (en) * 1993-09-16 1995-12-12 Maverick International, Inc. Compact remote-driven encoder
US6152625A (en) * 1999-07-27 2000-11-28 Fargo Electronics, Inc. Sensor hub for a print ribbon supply roll and method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3305188A (en) * 1964-04-17 1967-02-21 Robot Education Systems Tape cartridge
US3398290A (en) * 1965-04-02 1968-08-20 Carl J. Basehore Photoelectric wall switch with means to illuminate the operating surface
US3497157A (en) * 1967-07-14 1970-02-24 Minnesota Mining & Mfg Two-reel cartridges having reflecting means
US3638955A (en) * 1968-10-08 1972-02-01 Pioneer Electronic Corp Cassette tape recorder
US3615155A (en) * 1969-03-26 1971-10-26 Emery Gelbman Recording tape cartridge
US4115013A (en) * 1977-03-30 1978-09-19 Xerox Corporation End-of-ribbon sensor device
JPS568286A (en) * 1979-06-30 1981-01-28 Ricoh Co Ltd Printer control ststem at ribbon end detection
US4401394A (en) * 1981-10-13 1983-08-30 Xerox Corporation Universal end of ribbon sensing system

Also Published As

Publication number Publication date
DE3361103D1 (en) 1985-12-05
CH647982A5 (fr) 1985-02-28
JPS58205790A (ja) 1983-11-30
EP0094904A1 (de) 1983-11-23
US4492483A (en) 1985-01-08

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