EP0008681B1 - Cassette pour un ruban encreur - Google Patents

Cassette pour un ruban encreur Download PDF

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Publication number
EP0008681B1
EP0008681B1 EP79102767A EP79102767A EP0008681B1 EP 0008681 B1 EP0008681 B1 EP 0008681B1 EP 79102767 A EP79102767 A EP 79102767A EP 79102767 A EP79102767 A EP 79102767A EP 0008681 B1 EP0008681 B1 EP 0008681B1
Authority
EP
European Patent Office
Prior art keywords
ribbon
colour
storage space
housing
ribbon cassette
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
EP79102767A
Other languages
German (de)
English (en)
Other versions
EP0008681A1 (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

    • 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
    • B41J32/02—Ink-ribbon cartridges for endless ribbons
    • 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
    • B41J33/00—Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
    • B41J33/02—Ribbon arrangements
    • B41J33/10—Arrangements of endless ribbons

Definitions

  • the invention relates to an exchangeable ink ribbon cassette for printing units, comprising a housing with an essentially rectangular storage space enclosed by a bottom surface, a cover surface parallel to this and by side walls running between an inlet end and an outlet end of the housing for receiving an endless ink ribbon passing between a pair of transport rollers on the inlet side in a multiplicity of freely formable loops, the distance between the top and bottom surfaces being slightly larger than the width of the ink ribbon and with thresholds arranged at opposite points of the top surface and the bottom surface near the outlet end transversely to the general direction of flow of the ink ribbon through the storage space are whose 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-A 25 34 535 it has already been proposed in DE-A 25 34 535 to arrange the sleepers 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-A 25 36 645 it is known from DE-A 25 36 645 to divide the storage space into three spaces in succession with the aid of a plurality of thresholds, in which a gradual reduction in the band pressure toward the outlet opening takes place.
  • This embodiment is not only more complicated, but also has the same disadvantages as the embodiment according to DE-A 25 34 535.
  • the ribbon cassette according to DE-A-27 32 362 has on its inlet side ribbon retention and guide elements, each of which extends over a little less than half the width of the inlet end of the cassette housing and both circumferentially engage two transport rollers arranged inside the ribbon cassette , through whose nip the ribbon runs.
  • the invention has for its object to provide an easy to produce ribbon cassette of the generic type, which has a high volume storage capacity with a small volume and ensures trouble-free ribbon passage during operation.
  • the thresholds directed essentially perpendicular to the longitudinal side walls and substantially parallel to the exit gap between the transverse side walls that form each start from one of the two opposite longitudinal side walls and end at a distance from the other longitudinal side wall, so that a Avoid jamming of the tape loop ends located in these spacing areas and that at the entry-side end of each long side wall there is provided a band retaining and guiding element, each of which extends at a distance from the bottom surface and top surface substantially perpendicular to the respective long side wall over less than half the width of the open entry end of the housing and both engage in the cassette operating position on the two transport rollers arranged separately from the ribbon cassette on the circumference.
  • the conveyor rollers are located outside the ribbon cassette, which greatly reduces the manufacturing price of the ribbon cassette.
  • the ribbon cassette only needs to be placed on the conveyor rollers so that the ribbon guide elements engage in grooves in the rollers. None of the roles need to be swung away for this.
  • the tape guide elements are essentially between the cover plate and base plate, so that the risk of damage to these sensitive elements is greatly reduced. Because of this design, the ribbon cassette according to the invention is very simple in its construction and therefore inexpensive to manufacture.
  • 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 transverse side walls ensure that several belt loops cannot be pulled out through the outlet opening at the same time, if for some reason several belt loops should cross the sleepers at the same time.
  • the outlet gap between the transverse side walls is expediently made so wide that the ink ribbon can be pulled freely.
  • each ribbon retaining and guiding element preferably has a ribbon instruction area 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 stored with the aid of the transport or conveyor rollers rolling against one another. Since the ribbon retaining and guiding elements are each at a distance from the bottom and top surfaces, they can engage in a circumferential annular groove in the rollers and thus ensure that the ribbon is detached from the 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 ink ribbon cassette can be accommodated in the space that is delimited on three sides and is open towards the outside.
  • the latter is preferably designed such that its base area delimited by the side walls, the sleepers and the ribbon retention and guiding elements is essentially 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 plug-in connection elements are.
  • the plug connection elements are preferably designed in such a way 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.
  • the pin and socket can be designed so that they deform when they are brought together and prevent separation of the housing parts without destroying the housing.
  • the production of the ribbon cassette according to the invention can be achieved particularly simply and inexpensively in that both housing parts are of identical design. If the housing is made, for example, from injection molded plastic parts, then a single mold is sufficient to produce both housing parts.
  • 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 reintroduced into the storage space 12 through an inlet opening 20 by means of a storage or transport device, which is generally designated by 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-side 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 of the base 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 somewhat larger than the width of the ink ribbon 14, the height of the sleepers 34 is dimensioned such that their mutual distance is significantly less than the width of the ink ribbon 14. They thus form an obstacle for the ribbon loops 16 pushed from the inlet opening 20 towards the outlet opening 18, at which the ribbon loops are stowed.
  • 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 opposite the ink ribbon through 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 consists 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 is simple and inexpensive to manufacture and has a high tape storage capacity with small external dimensions.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Pens And Brushes (AREA)

Claims (8)

1. Cassette à ruban encreur échangeable pour groupe d'impression, comprenant une enveloppe (10) avec un espace d'emmagasinage sensiblement rectangulaire (12) qui, enfermé par une plaque inférieure (24), une plaque supérieure (26) parallèle à cette dernière et des parois latérales (28, 30) s'étendant entre une extrémité d'entrée et une extrémité de sortie de l'enveloppe (10), est destiné à recevoir, sous la forme de multiples boucles librement déformables (16), un ruban encreur sans fin (14) passant du côté de l'entrée entre deux galets transporteurs (38 et 40), la distance entre la plaque supérieure et la plaque inférieure (26, 24) étant légèrement plus grande que la largeur du ruban encreur (14) et en des endroits de la plaque supérieure (26) et de la plaque inférieure (24) situés l'un en regard de l'autre étant disposés, à proximité de l'extrémité de sortie, des seuils (34) qui s'étendent transversalement à la direction de défilement générale du ruban encreur (14) à travers l'espace d'emmagasinage (12) et dont la distance l'un par rapport à l'autre est inférieure à la largeur du ruban encreur (14), caractérisée en ce que les seuils (34) orientés sensiblement perpendiculairement aux parois latérales longitudinales (28) et sensiblement parallèlement aux parois latérales transversales (30) formant entre elles une fente de sortie (18) s'étendent chacun à partir de l'une des deux parois latérales longitudinales opposées (28) et se terminent à une certaine distance de l'autre paroi latérale longitudinale (28), de façon à éviter que les extrémités des boucles de ruban situées dans ces zones d'espacement ne se trouvent coincées et en ce qu'à l'extrémité côté entrée de chaque paroi latérale longitudinale (28) est prévu un organe de retenue et de guidage de ruban (32), lesquels organes s'étendent chacun respectivement à une certaine distance de la plaque inférieure (24) et de la plaque supérieure (26) sensiblement perpendiculairement à la paroi latérale longitudinale respective (28) sur moins de la moitié de la largeur de l'extrémité d'entrée ouverte de l'enveloppe (10) et s'engagent, dans la position de service de la cassette, chacun respectivement sur la périphérie de l'un des deux galets transporteurs (38 et 40) montés séparément de la cassette à ruban encreur.
2. Cassette à ruban encreur selon la revendication 1, caractérisée en ce que chaque organe de retenue et de guidage de ruban (32) présente à proximité de son extrémité libre, du côté de l'espace d'emmagasinage (12), une surface (46) guidant le ruban vers l'intérieur.
3. Cassette à ruban encreur selon la revendication 1 ou 2, caractérisée en ce que la plaque supérieure (26) et la plaque inférieure (24) font saillie vers l'extérieur au-delà des parois latérales longitudinales (28).
4. Cassette à ruban encreur selon l'une quelconque des revendications 1 à 3, caractérisée en ce que l'enveloppe (10) est réalisée de façon sensiblement symétrique tant par rapport à un plan médian longitudinal vertical s'étendant perpendiculairement à la plaque supérieure (26) et à la plaque inférieure (24) centralement entre les parois latérales longitudinales (28) que par rapport à un plan médian horizontal s'étendant parallèlement à la plaque supérieure (26) et à la plaque inférieure (24) centralement entre celles-ci.
5. Cassette à ruban encreur selon la revendication 4, caractérisée en ce que l'enveloppe (10) est constituée par deux parties identiques (50) qui comprennent chacune respectivement l'un des deux éléments principaux (plaque inférieure 24, plaque supérieure 26), une paroi latérale longitudinale (28) et la paroi latérale transversale (30) prévue du côté de la sortie de l'espace d'emmagasinage (12) et qui est solidaire de cette paroi latérale longitudinale ainsi que l'organe de retenue et de guidage de ruban (32) solidaire de la paroi latérale longitudinale (28).
6. Cassette à ruban encreur selon la revendication 5, caractérisée en ce que les deux parties (50) de l'enveloppe peuvent être reliées entre elles de manière inamovible par des organes de liaison par mise en prise (52, 54).
7. Cassette à ruban encreur selon la revendication 6, caractérisée en ce que chaque paire d'organes de liaison par mise en prise coopérant entre eux comporte un tenon (54) monté sur l'une des parties (50) de l'enveloppe et un organe de mise en prise femelle (52) prévu respectivement sur l'autre partie (50) de l'enveloppe et destiné à recevoir le tenon (54).
8. Cassette à ruban encreur selon l'une quelconque des revendications 1 à 7, caractérisée en ce que, lorsque la cassette à ruban encreur n'est pas utilisée, l'enveloppe (10) peut être fermée par une barrette de sûreté élastiquement déformable (48) dont la longuer est plus du double de la longueur de l'espace d'emmagasinage (12) et qui à travers l'extrémité d'entrée de l'espace d'emmagasinage (12) est introduite dans celui-ci de façon à s'étendre avec l'une de ses extrémités à partir de l'extrémité côté sortie d'une paroi latérale (28) le long du côté intérieur, à prendre appui avec une courbure contre l'extrémité libre des organes de retenue et de guidage de ruban (32) et à revenir, en étant courbée en S, avec son autre extrémité vers son extrémite citée en premier.
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
DE19787826639U DE7826639U1 (de) 1978-09-07 1978-09-07 Farbbandkassette
DE7826639U 1978-09-07

Publications (2)

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

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4212420A (en) * 1979-06-18 1980-07-15 International Business Machines Corporation Ribbon storage device
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

Family Cites Families (14)

* 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
DE2136777B2 (de) * 1971-07-22 1977-12-01 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur befestigung einer farbbandkassette auf einer druckeinrichtung
US3814231A (en) * 1973-04-24 1974-06-04 Scm Corp Stuffed ribbon cartridge
US3989132A (en) * 1974-08-26 1976-11-02 General Electric Company Ribbon storage and transport mechanism
IT1024841B (it) * 1974-11-18 1978-07-20 Olivetti Ing C S P A Cartuccia per un nastro inchiostra to senza fine di macchine per ufficio soriventi
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
DD128087A1 (de) * 1976-09-27 1977-11-02 Juergen Roth Farbbandkassette
US4088218A (en) * 1976-10-12 1978-05-09 Ncr Corporation Ribbon cassette with bi-color capability
FR2423341B1 (fr) * 1978-04-19 1987-01-09 Olivetti & Co Spa Cartouche de ruban encre pour tete d'impression a aiguilles, notamment pour imprimante

Also Published As

Publication number Publication date
DE7826639U1 (de) 1978-12-21
JPS5538699U (fr) 1980-03-12
US4270867A (en) 1981-06-02
ATE3623T1 (de) 1983-06-15
DE2965568D1 (en) 1983-07-07
EP0008681A1 (fr) 1980-03-19

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