EP0008681A1 - Cassette pour un ruban encreur - Google Patents

Cassette pour un ruban encreur Download PDF

Info

Publication number
EP0008681A1
EP0008681A1 EP79102767A EP79102767A EP0008681A1 EP 0008681 A1 EP0008681 A1 EP 0008681A1 EP 79102767 A EP79102767 A EP 79102767A EP 79102767 A EP79102767 A EP 79102767A EP 0008681 A1 EP0008681 A1 EP 0008681A1
Authority
EP
European Patent Office
Prior art keywords
ribbon
ribbon cassette
storage space
housing
cassette according
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
EP79102767A
Other languages
German (de)
English (en)
Other versions
EP0008681B1 (fr
Inventor
Johannes Haftmann
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.)
Wincor Nixdorf International GmbH
Original Assignee
Wincor Nixdorf International GmbH
Nixdorf Computer 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 Wincor Nixdorf International GmbH, Nixdorf Computer AG filed Critical Wincor Nixdorf International GmbH
Priority to AT79102767T priority Critical patent/ATE3623T1/de
Publication of EP0008681A1 publication Critical patent/EP0008681A1/fr
Application granted granted Critical
Publication of EP0008681B1 publication Critical patent/EP0008681B1/fr
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J32/00Ink-ribbon cartridges
    • B41J32/02Ink-ribbon cartridges for endless ribbons
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J33/00Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
    • B41J33/02Ribbon arrangements
    • B41J33/10Arrangements of endless ribbons

Definitions

  • the innovation relates to an exchangeable ink ribbon cassette for printing units, comprising a housing with a storage space enclosed by a substantially flat base surface, a cover surface essentially parallel to this and side walls running essentially perpendicular to the cover and base surface, for accommodating an endless ribbon in a multiplicity of freely formable loops and with an inlet and outlet opening for the ribbon, the distance between the top and bottom surfaces being slightly larger than the width of the ribbon and with the cover surface and the bottom surface between the inlet and outlet openings at opposite locations between the inlet and outlet openings general direction of passage of the ribbon through the storage space directed thresholds, the distance from each other is less than the width of the ribbon.
  • Such ink ribbon cassettes can be inserted into the ink ribbon device for printing units, the part of the endless ink ribbon located outside the ink ribbon cassette running through the printing unit and pulled out of the ink ribbon cassette at the outlet opening by means of suitable transport devices and inserted into the ink ribbon cassette at the inlet opening to form the loops.
  • the ribbon cassettes of this type have the task of accommodating as many ribbon loops as possible in the storage space in order to achieve the longest possible service life of the ribbon cassette with a small space requirement for the ribbon cassette.
  • the ribbon build-up pressure created by pressing a large length of ribbon into the storage space can make it difficult for the ribbon to be pulled out on the outlet side or that several ribbon loops are pulled out at the same time when the ribbon is pulled out of the outlet opening.
  • DE-OS 25 34 535 it has already been proposed in DE-OS 25 34 535 to arrange the thresholds approximately in the middle between the inlet and outlet openings, so that the storage space is subdivided into an inlet space with a high belt pressure and an outlet room with a low belt pressure. If the belt back pressure in the inlet space exceeds a certain size, individual belt loops between the sleepers are pressed into the outlet space, in which they lie loosely, without exerting pressure on the outlet opening.
  • DE-OS 25 36 645 it is known from DE-OS 25 36 645 to divide the storage space into three spaces with the aid of several sleepers, in which a gradual reduction in the band pressure to the outlet opening follows.
  • This embodiment is not only more complicated, but also has the same disadvantages as the embodiment according to DE-OS 25 34 535.
  • the innovation is based on the object of specifying an easy-to-produce ribbon cassette of the type mentioned, which has a high volume storage capacity with a small volume.
  • the thresholds are arranged near the exit end of the storage space.
  • the entire storage space can be used for storing ribbon loops with high ribbon back pressure, whereby a large amount of ribbon can be stored in the storage space for a given volume of the ribbon cassette.
  • the thresholds nevertheless prevent the belt loops from jamming in front of the outlet opening.
  • the force required to pull a ribbon loop between the two opposing sleepers is much less than the force that would be required to pull the ribbon out of the outlet opening if it is blocked by the jammed ribbon loops.
  • the slight distance between the sleepers and the outlet opening ensures that this cannot happen, but that half or a whole loop of the ribbon lies loosely between the sleepers and the outlet opening.
  • the two fasteners each extend from one of the two opposite side walls of the housing to a point near the other side wall.
  • the clear height of the storage space between the top and bottom surfaces is only reduced by a threshold height in the immediate vicinity of each side wall, so that the passage of the ink ribbon is facilitated near each side wall, and thus the stiffening effect of the loop bending does not matter.
  • the sleepers In order to facilitate the sliding of the ink ribbon over the sleepers and to protect the ink ribbon, the sleepers preferably have a semicircular cross-sectional profile on the facing surfaces.
  • the housing wall delimiting the storage space on the outlet side of two has a tape outlet gap between them defining part walls is formed. It is sufficient to make this ribbon exit gap so wide that the ribbon can be pulled freely.
  • the housing for connection to a tape storage device is preferably essentially open, with a tape retaining and guiding element being arranged at the entry-side end of each side wall, said element being essentially perpendicular to the respective side wall over less than half the width of the entry opening extends.
  • This strap retaining and guiding element ensures that when the transport lock is removed from a new one Ribbon cassette the ribbon loops in the ribbon cassette, which are under relatively high back pressure, cannot snap out through the inlet opening.
  • the entry opening is large enough to allow the tape to be stored in the storage space. This development can advantageously also be provided for other cassettes.
  • each ribbon retaining and guiding element has a ribbon instruction surface near its free end on the side facing the storage space. This prevents the ribbon from wrapping around the rollers, for example when the ink ribbon is being stored with the aid of two transport rollers rolling against each other.
  • the ribbon retaining and guiding elements preferably extend only over part of the height of the housing, so that they can engage, for example, in a circumferential annular groove of the feed rollers and thus ensure that the ribbon is detached from the feed rollers.
  • the top surface and the bottom surface preferably each protrude outward beyond the side walls.
  • the part of the ribbon running outside the storage space between the outlet opening and the inlet opening, forming a Möbius loop, during the transport of the ribbon cassette can be accommodated in the space which is delimited on three sides and is open to the outside.
  • this is preferably designed so that its from the side walls, the sleepers and the band retaining and guiding elements limited base area is substantially rectangular.
  • the housing is preferably essentially symmetrical both with respect to its vertical longitudinal center plane running perpendicular to the ceiling and floor surface in the middle between the side walls and with respect to a horizontal center plane running parallel to the ceiling and floor surface in the middle between these.
  • this preferably consists of at least two housing parts, one of which comprises the bottom surface and the other the top surface.
  • Such a division facilitates, for example, the demolding of the housing parts when they are manufactured as injection molded parts.
  • the assembly of the two housing parts after inserting the ribbon is particularly simple if the two housing parts can be connected to one another by means of plug connection elements.
  • the plug-in connection elements are preferably designed such that the housing parts can be non-detachably locked together.
  • each pair of mutually cooperating plug-in connection elements consists of a pin arranged on one housing part and a plug-in socket arranged on the respective other housing part for receiving the pin.
  • Pin and socket can be designed so that they deform when merging and prevent separation of the housing parts without destroying the housing.
  • each of the housing parts has a side wall to the top or bottom surface and the part wall connected with this on the outlet side of the storage space and the band retention and - connected with this side wall. includes guide element.
  • the ink ribbon cassette shown in FIG. 1 comprises a housing, generally designated 10, with a storage space 12 for receiving an endless ink ribbon 14, which is stored in the storage space 12 in a multiplicity of freely shaped ribbon loops 16.
  • the ink ribbon 14 leaves the storage space 12 through an outlet opening 18 and is re-introduced into the storage space 12 through an inlet opening 20 by means of a storage or transport device, which is generally designated 22. Between the outlet opening 18 and the inlet opening 20, the ink ribbon 14 passes through a printing unit (not shown), forming a Möbius loop.
  • the storage space 12 is delimited by a base plate 24 (FIG. 5), a cover plate 26 running parallel to this, side walls 28 which run essentially parallel to one another perpendicular to the base plate 24 and cover plate 26, and on the outlet side of the storage space 12 by two running between the base plate 24 and the cover plate 26, the gap-shaped outlet opening 18 between defining transverse walls 30.
  • the storage space 12 is essentially open except for two band retaining and guiding elements 32, which are arranged at the entry end of each side wall 28 and each extend perpendicular to the respective side wall 28 over less than half the width of the storage space 12.
  • a threshold or rib 34 is arranged both on the base plate 24 and on the cover plate 26, which is perpendicular to the side walls 28 at opposite points the bottom plate 24 and the cover plate 26 extend transversely to the general conveying direction of the ink ribbon 14. While the distance between the base plate 24 and the cover plate 26 is slightly larger than the width of the ribbon 14, the height of the thresholds 34 is such that their mutual distance is significantly less than the width of the ribbon 14. They thus form for the of the inlet opening 20 towards the outlet opening 18 pushed ribbon loops 16 an obstacle on which the ribbon loops jam.
  • each threshold 34 starts from one of the side walls 28 and extends only to the vicinity of the other side wall 28, the two thresholds 34 starting from the opposite side walls.
  • the distance between base plate 24 and cover plate 26 is only reduced by one rib height. This also reduces the resistance opposed to the ink ribbon by the thresholds 34.
  • the area with the smallest radius of curvature is located directly on one of the side walls 28. In this area, the ribbon is relatively stiff against buckling, so that greater resistance has to be overcome if the ribbon is pulled between the sleepers 34 want.
  • the free end 36 of the respective threshold 34 is chamfered (FIG. 3).
  • the ribbon transport device 22 indicated in FIG. 1 comprises two transport rollers 38 and 40, between which the ribbon 14 runs.
  • the ribbon retention and guiding elements are intended to prevent the ribbon 14 from wrapping around the transport rollers 38 or 40. At the same time, they should ensure that the ink ribbon 14 is properly inserted into the storage space 12, forming the ribbon loops 16.
  • the elements 32 are designed in the manner shown in FIG. 4, so that they can engage in a circumferential groove 42 or 44 of the transport rollers 38 or 40. Near their free ends on the side facing the storage space 12, the elements 32 each have an instruction surface 46, the radius of curvature of which essentially corresponds to the radius of curvature of the respective transport roller.
  • the elements 32 serve to hold an elastically flexible securing strip 48 which is inserted into the storage space 12 in the manner shown in FIG. 6 and lies in front of the inlet opening 20, so that the storage space 12 is essentially sealed by the security strip 48. This prevents ribbon ribbons from falling out of the storage space 12 during the transport of the ribbon cassette and drying of the color of the ribbon during longer storage times. If, on the other hand, the security strip 48 is pulled out of the storage space 12 immediately before the ribbon cassette is used, the elements 32 prevent the ribbon loops 16, which are under a certain dynamic pressure, from snapping out of the storage space.
  • the base plate 24 and the cover plate 26 protrude somewhat beyond the side walls 28, so that a space which is delimited on three sides and is open to the outside is created.
  • the piece of ink ribbon 14 running outside the storage space 12 between the outlet opening 18 and the inlet opening 20 is inserted into this space during transport, so that it cannot be damaged.
  • the housing shown in FIG. 1 is new of two housing parts 50, each of which comprises a bottom surface 24 or top surface 26, a side wall 28, a transverse wall 30, a band retaining and guiding element 32 and a rib 34.
  • the two housing parts 50 are connected to one another by plug connection elements.
  • each housing part 50 has a plug-in socket arranged on the side wall 28 near the end on the inlet side thereof and an insertion socket arranged at an angle between the side wall 28 and the transverse wall 30 for receiving a pin 54 arranged at a corresponding point on the other housing part 50. If the housing part 50 shown in FIG.
  • the housing parts 50 can thus be produced as simple injection molded parts from a preferably transparent plastic. After inserting the ribbon 14, the two housing parts are plugged together with the aid of the connector elements 52, 54 and pressed against each other. With a somewhat conical design of the pins 54 and a complementary conical shape of the recesses in the plug-in sockets 52, a firm connection between the two can be achieved by appropriate pressure on the two housing parts.
  • the new ribbon cassette according to the invention is simple and inexpensive to manufacture and has a high tape storage capacity with small external dimensions.

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  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Pens And Brushes (AREA)
EP79102767A 1978-09-07 1979-08-01 Cassette pour un ruban encreur Expired EP0008681B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79102767T ATE3623T1 (de) 1978-09-07 1979-08-01 Farbbandkassette.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE7826639U 1978-09-07
DE19787826639U DE7826639U1 (de) 1978-09-07 1978-09-07 Farbbandkassette

Publications (2)

Publication Number Publication Date
EP0008681A1 true EP0008681A1 (fr) 1980-03-19
EP0008681B1 EP0008681B1 (fr) 1983-06-01

Family

ID=6694890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79102767A Expired EP0008681B1 (fr) 1978-09-07 1979-08-01 Cassette pour un ruban encreur

Country Status (5)

Country Link
US (1) US4270867A (fr)
EP (1) EP0008681B1 (fr)
JP (1) JPS5538699U (fr)
AT (1) ATE3623T1 (fr)
DE (2) DE7826639U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021138B1 (fr) * 1979-06-18 1984-03-07 International Business Machines Corporation Cartouche à ruban stocké en vrac

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6112152Y2 (fr) * 1980-10-14 1986-04-16
DE3513766A1 (de) * 1985-04-17 1986-10-23 Olympia AG, 2940 Wilhelmshaven Farbbandkassette fuer schreibmaschinen oder druckvorrichtungen aehnlicher bauart mit einem endlosgewebefarbband
GB8527594D0 (en) * 1985-11-08 1985-12-11 Data Recording Instr Co Ribbon cassette for printers
US4783184A (en) * 1987-07-31 1988-11-08 Ncr Corporation Endless ribbon cassette with exit port ribbon control

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2536645A1 (de) * 1974-08-26 1976-03-11 Gen Electric Bandspeicherungs- und -transportmechanismus
FR2291037A1 (fr) * 1974-11-18 1976-06-11 Olivetti & Co Spa Cartouche pour ruban encre sans fin pour machines de bureau
DE2136777B2 (de) * 1971-07-22 1977-12-01 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur befestigung einer farbbandkassette auf einer druckeinrichtung
DE2732362A1 (de) * 1976-09-27 1978-03-30 Zentronik Veb K Farbbandkassette
DE7911630U1 (de) * 1978-04-19 1979-07-19 Ing. C. Olivetti & C., S.P.A., Ivrea, Turin (Italien) Farbbandkassette fuer einen nadeldruckkopf

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US764342A (en) * 1903-03-25 1904-07-05 John W Booth Type-writing machine.
US2685357A (en) * 1949-11-24 1954-08-03 Koreska Robert Endless ribbon feeding mechanism for typewriters
FR1218146A (fr) * 1959-02-28 1960-05-09 Epsylon Res & Dev Co Ltd Dispositif de contrôle automatique pour un magasin de bande magnétique
US3075627A (en) * 1961-10-02 1963-01-29 Syracuse Stamping Company Inc Inked ribbon cartridge casing
DE2148950A1 (de) * 1971-09-30 1973-04-05 Siemens Ag Vorrichtung zur befestigung einer farbbandkassette auf einer druckeinrichtung
US3814231A (en) * 1973-04-24 1974-06-04 Scm Corp Stuffed ribbon cartridge
DE2618379B2 (de) * 1976-04-27 1980-04-30 Triumph Werke Nuernberg Ag, 8500 Nuernberg Endlosfarbbandkassette für Schreibund ähnliche Maschinen
US4113750A (en) * 1976-05-28 1978-09-12 Oki Electric Industry Co., Ltd. Pack for endless ink ribbon cartridge
US4088218A (en) * 1976-10-12 1978-05-09 Ncr Corporation Ribbon cassette with bi-color capability

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2136777B2 (de) * 1971-07-22 1977-12-01 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur befestigung einer farbbandkassette auf einer druckeinrichtung
DE2536645A1 (de) * 1974-08-26 1976-03-11 Gen Electric Bandspeicherungs- und -transportmechanismus
FR2291037A1 (fr) * 1974-11-18 1976-06-11 Olivetti & Co Spa Cartouche pour ruban encre sans fin pour machines de bureau
DE2732362A1 (de) * 1976-09-27 1978-03-30 Zentronik Veb K Farbbandkassette
DE7911630U1 (de) * 1978-04-19 1979-07-19 Ing. C. Olivetti & C., S.P.A., Ivrea, Turin (Italien) Farbbandkassette fuer einen nadeldruckkopf

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021138B1 (fr) * 1979-06-18 1984-03-07 International Business Machines Corporation Cartouche à ruban stocké en vrac

Also Published As

Publication number Publication date
DE7826639U1 (de) 1978-12-21
ATE3623T1 (de) 1983-06-15
US4270867A (en) 1981-06-02
JPS5538699U (fr) 1980-03-12
DE2965568D1 (en) 1983-07-07
EP0008681B1 (fr) 1983-06-01

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