EP0012878B1 - Farbbandantrieb, z.B. in einem Schnelldrucker - Google Patents

Farbbandantrieb, z.B. in einem Schnelldrucker Download PDF

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Publication number
EP0012878B1
EP0012878B1 EP79104865A EP79104865A EP0012878B1 EP 0012878 B1 EP0012878 B1 EP 0012878B1 EP 79104865 A EP79104865 A EP 79104865A EP 79104865 A EP79104865 A EP 79104865A EP 0012878 B1 EP0012878 B1 EP 0012878B1
Authority
EP
European Patent Office
Prior art keywords
reel
drive belt
ribbon
drive
take
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
EP79104865A
Other languages
English (en)
French (fr)
Other versions
EP0012878A3 (en
EP0012878A2 (de
Inventor
John Daniel Bemis
Jr. Willie Goff
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0012878A2 publication Critical patent/EP0012878A2/de
Publication of EP0012878A3 publication Critical patent/EP0012878A3/fr
Application granted granted Critical
Publication of EP0012878B1 publication Critical patent/EP0012878B1/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
    • B41J33/00—Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
    • B41J33/14—Ribbon-feed devices or mechanisms
    • B41J33/24—Ribbon-feed devices or mechanisms with drive applied directly to ribbon

Definitions

  • the present invention relates to devices for driving reels of strip material, and more particularly, to a device for driving the ribbon in impact printers.
  • the tape should make a very open angle to the surface of the paper, that is, it is almost parallel to the paper.
  • the tension to be applied to the ribbon to remove it from the paper after a strike will be greater than that necessary in conventional printing ball machines in which the ribbon makes a less open angle facing the paper.
  • the physical arrangement of the various elements is such that the ribbon is unsupported over a greater length of the printing surface. This increases the requirements regarding the tension of the tape.
  • the tension of the belt depends not only on the difference in the speeds of the capstans and on the physical characteristics of the belt, but also depends on the elasticity of the belt. Consequently, in this device of the prior art, numerous parameters must be determined and correlated to obtain the desired tension on the strip. Furthermore, with such a device, it is not possible to adjust the initial tension of the strip to a desired value. The reason is that such an adjustment implies that one can rotate the take-up reel (for example manually) without turning the supply reel. Because the two coils are constantly coupled in rotation via the belt, such an operation is not possible. Such a drawback would prove particularly unfortunate in the case where the device is used to drive the printing ribbon of a printer.
  • each coil is driven by its own belt, which is inextensible.
  • the tension of the material driven from one reel to the other does not depend on the elasticity characteristics of the belts, which reduces the number of parameters to be correlated.
  • the present invention relates to a device for driving reels of very fragile and easily deformable tape or tape.
  • This device maintains said ribbon or said strip under a constant and uniform tension and can be used in impact printers operating at high speed to drive the ribbon of these printers.
  • the device according to the invention rotates a take-up reel and a feed reel, each reel being designed to carry a certain quantity of ribbon unwinding from the feed reel to the take-up reel, the reels rotating with a constant circumferential speed difference. Maintaining this constant speed difference regardless of the quantity of ribbon wound on the supply reel and on the take-up reel, ensures uniform and constant tension of the ribbon.
  • the device comprises a first relatively inextensible drive belt driving without slipping the periphery of the part of the ribbon wound on the take-up reel, and a second relatively inextensible driving belt not connected to the first belt, causing without sliding the periphery of the part of the ribbon wound on the supply reel.
  • the device further comprises means driving the first belt at a predetermined constant linear speed and means driven without slippage by the first belt and in turn driving the second belt without slipping at a constant linear speed slower than that of the first belt .
  • the portion of tape between the supply spool and the take-up spool is kept at a constant tension.
  • the existence of two separate belts for driving the reels makes it possible, if necessary, to adjust the tension of the ribbon by slightly turning one of the belts after having decoupled it from the other.
  • FIGS. 1 to 4 for the description of the drive device of the present invention.
  • Figures 1 and 4 show a cartridge housing 10 containing a ribbon 11. A part 12 of the ribbon is wound on a supply reel and a part 13 is wound on a take-up reel.
  • the housing 10 is released from the ribbon drive device 14 according to the invention and these two assemblies are shown in the loading and unloading position of the ribbon cartridge which is a vertical position.
  • two pairs of cartridge positioning fingers 15, 15 ', 15 "and 15 111 are respectively received and guided by two pairs of vertical rails 16 and 17, of the drive device , each pair of rails 16 and 17 defining passages 18 and 19 for receiving and guiding the positioning fingers.
  • the positioning fingers 15 and 15 are brought by the passages 18 and 19 into holes 70 formed in flexible tongues 20, which causes the blocking of the cartridge in the operating position.
  • the tabs 20 are manually separated from the cartridge so that the fingers 1 5 and 1 5 "are released from their respective hole 70.
  • the loading and unloading are carried out in the vertical position represented in FIG. 1, after which the device is tilted around the axes 21 (figure 2) to be brought with the ribbon into the horizontal operating position shown in FIGS. 2, 3 and 4,
  • the mechanisms allowing the rotation of the drive device and of the ribbon from the vertical position to the horizontal position will be described in detail below. below, referring to FIGS. 2 and 3.
  • the ribbon drive device is mounted on the chassis 22 of the carriage carrying the printing element of the printer by means of a support 23 which is bolted to the chassis of the carriage. If it is desired to tilt the ribbon drive device 14 from its horizontal position shown in Figures 2 and 3 to its vertical position shown in Figure 1, the cartridge (not shown in Figures 2 and 3) must be pushed in. until it applies a force directed downwards on the arm 24 of a bent gear 25. This force causes the rotation of the gear 25 around an axis 26 and the displacement of a plunger 27 to the against the force exerted by a spring 28, in order to disengage said plunger 27 from an opening 29 formed in a stop plate 71 secured to the support 27, opening in which it was blocked.
  • a spring 30 which is mounted to return the ribbon drive device 14 upwards in FIG. 4, can thus tilt the unlocked drive device towards its vertical or loading and unloading position shown. in FIG. 1. If it is then desired to return the drive device to the horizontal position of FIGS. 2 and 3, it can be manually tilted around the finger 21 against the force exerted by the spring 30 until the plunger 27 is again blocked in the opening 29 of the stop plate 71.
  • FIG. 4 shows that the ribbon 11 is driven in front of a printing medium, for example, a sheet of paper 31, carried by a plate 32.
  • a conventional printing wheel 33 has tongues 34 which each have a different character to to print.
  • the printing wheel can rotate between the ribbon and a striking hammer 35.
  • the ribbon driving device comprises a stepping motor 37 (see FIG. 1) driving a pinion 38 rotating clockwise on the Figure 4.
  • the pinion 38 drives a wheel 39 which, in turn, drives a pulley 40 which is attached to it.
  • the pulley 40 drives an inextensible belt 41 for driving the take-up reel 13.
  • This belt 41 is guided by pulleys 42, 43, 44, 45, 46 and 47.
  • the belt 41 is also guided by a pulley with movable axis 48 which is connected to a tension spring 50 which will be described later and by a pulley 49 which is fixed to a drive pinion 51.
  • An inextensible belt 52 for driving the supply reel 12 is supported and guided by a series of guide pulleys 53 to 58 which correspond to the pulleys 42 to 47 associated with the drive belt for the take-up reel.
  • a guide pulley 59 with a movable axis performs a function identical to that provided by the pulley 48.
  • the pinion 51 drives a idler gear 60 which, in turn, drives a pinion 61 of the same diameter as that of the pinion 51.
  • a pulley 62 is fixed to the pinion 61 and serves to drive the belt 52 of the feed reel.
  • the pulley 62, associated with the drive belt of the feed reel, has a diameter slightly smaller than that of the pulley 49.
  • the drive belt 52 of the feed reel will be driven at a linear speed slightly lower than that of the drive belt 41 of the take-up reel. Since the belts 41 and 52 respectively drive the take-up reel 13 and the feed reel 14 by their periphery and without sliding, the part of the tape 11 leaving the feed reel 12 will be driven at a slightly lower constant linear speed to that of the part of the ribbon 11 winding on the receiving reel 13. This speed difference ensures the application of a constant tension to the ribbon. With this arrangement, the difference in speed remains constant and consequently, the slight tension applied to the ribbon also remains constant regardless of the length of the ribbon wound on the supply reel 12 and on the take-up reel 13.
  • the belts 41 and 52 are practically inextensible, the sum of the length of the part of the drive belt 41 in contact with the periphery of the ribbon wound on the take-up reel 13 and the length of the part of the drive belt 52 in contact with the periphery of the ribbon wound on the supply reel 12, remains practically constant independently ment of variations in the quantity of ribbon wound on each of these reels.
  • the spring 50 and its associated pulleys 48 and 59 prohibit any slack in the drive belts 41 and 52 which could be caused by changes in the amount of ribbon wound on the reels 13 and 12.
  • pulleys 48 and 59 are mobile, that is to say that they do not have a fixed position and shift according to the modifications of the quantity of ribbon wound on the receiving and supply coils .
  • the length of the spring 50 remains constant, but its position shifts from left to right as indicated by the arrows, to compensate for the changes in the length of the ribbon wound on the receiving 12 and supply 13 coils and maintain constant pressure of each of the belts on the reel with which it is associated.
  • the button 63 (FIG. 1) can be used to manually release the pulley 62 and its pinion 61 from the idler gear 60 so that the drive belt 52 is decoupled. of the belt 41.
  • the position of the belt 52 can then be modified to adjust the tension of the ribbon 11 while the drive belt 41 and the take-up reel 13 remain in a fixed position.
  • the button 63 and at the same time the pulley 62 and the pinion 61 can be returned to the operating position.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)

Claims (6)

1. Vorrichtung zum Drehantrieb einer Vorrats- und einer Aufwickelspule, bei dem jede Spule einen Teil der Bandlänge trägt, der von der Vorratsspule zur Aufwickelspule mit einer konstanten Geschwindigkeitsdifferenz zwischen der linearen Abwickelgeschwindigkeit und der linearen Aufwickelgeschwindigkeit transportiert wird, dadurch gekennzeichnet, daß die Vorrichtung enthält:
einen ersten nicht dehnbaren Antriebsriemen, der an der Umfangsfläche des um die Abwickelspule gewickelten Bandteiles anliegt, wobei die Spule schlupffrei vom Riemen angetrieben wird,
einen zweiten nicht dehnbaren, vom ersten Antriebsriemen unabhängigen Antriebsriemen, der an der Umfangsfläche des um die Aufwickelspule gewickelten Bandteils anliegt, wobei die Spule schlupffrei vom Riemen angetrieben wird,
ein erstes Mittel zum Antrieb des ersten Antriebsriemens mit einer ersten konstanten linearen Geschwindigkeit,
ein zweites Mittel zum Antrieb des zweiten Antriebsriemens mit einer zweiten konstanten linearen Geschwindigkeit, die geringer ist als die erste lineare Geschwindigkeit, wobei die konstante Differenz zwischen den beiden linearen Geschwindigkeiten die Aufrechterhaltung einer konstanten Spannung des zwischen den beiden genannten Spulen befindlichen Bandteils bewirkt.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß Mittel zur Bewegungsübertragung vorgesehen sind, die den ersten Antriebsriemen mit dem zweiten Mittel so kuppeln, daß eine Bewegung des ersten Antriebsriemens eine Bewegung des zweiten Mittels sowie des zweiten Antriebsriemens zur Folge hat.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Summe der Längen des Teils des ersten in Kontakt mit der Umfangsfläche der Aufwickelspule befindlichen Antriebsriemens und des Teils des zweiten in Kontakt mit der Umfangsfläche der Abwickelspule befindlichen Antriebsriemens unabhängig von den Änderungen der um jede Spule gewickelten Bandlänge konstant bleibt, und daß ein dehnbares Glied vorgesehen ist, das die Antriebsriemen so kuppelt, daß die Länge des genannten dehnbaren Gliedes und daher die von jedem Antriebsriemen auf die jeweils ihm zugeordnete Spule ausgeübte Spannung unabhängig von den Änderungen der um jede Spule gewickelten Bandlänge konstant bleiben.
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das dehnbare Glied ein Zugfeder ist.
5. Vorrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß Mittel zur handbetätigten Entkupplung der genannten Mittel zur Bewegungsübertragung vorgesehen sind, so daß die Bewegung des ersten Antriebsriemens keine Bewegung des zweiten Antriebsriemens zur Folge hat und so ein einzelner Antriebsriemen verschoben und die Spannung des Bandes eingestellt werden kann.
6. Verwendung der in einem der Ansprüche 1 bis 5 beschriebenen Anordnung zum Antrieb des Farbbandes in einem Drucker.
EP79104865A 1979-01-02 1979-12-04 Farbbandantrieb, z.B. in einem Schnelldrucker Expired EP0012878B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/000,234 US4265552A (en) 1979-01-02 1979-01-02 Ribbon drive mechanism for high speed printer
US234 1979-01-02

Publications (3)

Publication Number Publication Date
EP0012878A2 EP0012878A2 (de) 1980-07-09
EP0012878A3 EP0012878A3 (en) 1981-03-25
EP0012878B1 true EP0012878B1 (de) 1983-09-21

Family

ID=21690546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104865A Expired EP0012878B1 (de) 1979-01-02 1979-12-04 Farbbandantrieb, z.B. in einem Schnelldrucker

Country Status (9)

Country Link
US (1) US4265552A (de)
EP (1) EP0012878B1 (de)
JP (1) JPS5593486A (de)
AU (1) AU526559B2 (de)
BR (1) BR7908621A (de)
CA (1) CA1124198A (de)
DE (1) DE2966210D1 (de)
ES (1) ES487054A1 (de)
IT (1) IT1165425B (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359288A (en) * 1980-06-16 1982-11-16 International Business Machines Corporation Single pass ribbon cartridge for impact printers having means to prevent incorrect insertion
JPS5971742U (ja) * 1982-11-08 1984-05-16 ぺんてる株式会社 熱転写式プリンタのリボン送り装置
JPS59111883A (ja) * 1982-12-17 1984-06-28 Canon Inc インクリボンカセツト装着機構
JPS6192878A (ja) * 1984-10-12 1986-05-10 Ricoh Co Ltd リボンカセツトのリボン交換構造
JPH0428786Y2 (de) * 1985-05-20 1992-07-13
US4707155A (en) * 1985-12-24 1987-11-17 International Business Machines Corporation Re-inkable ribbon transport system
JPH0630449Y2 (ja) * 1986-09-08 1994-08-17 ブラザー工業株式会社 印字装置
JP2635049B2 (ja) * 1987-07-24 1997-07-30 株式会社日立製作所 熱転写記録装置
DE3741363A1 (de) * 1987-12-07 1989-06-15 Triumph Adler Ag Traeger eines farbbandes fuer schreib- und aehnliche maschinen
DE3741360A1 (de) * 1987-12-07 1989-06-15 Triumph Adler Ag Aufnahmevorrichtung fuer einen traeger eines farbbandes in schreib- oder aehnlichen maschinen
US5427658A (en) * 1993-10-21 1995-06-27 Electrosci Incorporated Electrolytic cell and method for producing a mixed oxidant gas
US6857804B2 (en) * 1999-10-16 2005-02-22 Sierra Design Group Vertically mounted modular printer system
US6443642B1 (en) * 1999-10-16 2002-09-03 Sierra Design Group Modular printing system
US7513401B1 (en) 2000-06-19 2009-04-07 Bally Gaming, Inc. Printer tear bar and presenter system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1046711A (en) * 1911-02-16 1912-12-10 F M Da Costa Type-writing-machine ribbon-operating mechanism.
FR698262A (fr) * 1930-07-01 1931-01-29 Dispositif pour l'enroulement et le déroulement d'un fil ou d'une bande d'une bobine sur une autre
US3084880A (en) * 1960-05-03 1963-04-09 North American Aviation Inc Slip clutch gear box
US3305186A (en) * 1963-04-18 1967-02-21 Kinclogic Corp Tape transport system using a drive belt contacting tape packs
US3383061A (en) * 1963-08-30 1968-05-14 Malcolm F. Thompson Tape transport means having variable speed supply and take-up reels
US3802644A (en) * 1971-10-01 1974-04-09 Motorola Inc Differential belt web transport
DE2349397C3 (de) * 1973-10-02 1981-01-29 Olympia Werke Ag, 2940 Wilhelmshaven Vorrichtung zum Erzeugen einer Bandspannung im wesentlichen konstanter Größe bei einem Farbband
US3974982A (en) * 1975-02-24 1976-08-17 Raymond Engineering Inc. Tape transport

Also Published As

Publication number Publication date
IT7928119A0 (it) 1979-12-18
EP0012878A3 (en) 1981-03-25
JPH0156917B2 (de) 1989-12-01
EP0012878A2 (de) 1980-07-09
AU5386479A (en) 1980-07-10
IT1165425B (it) 1987-04-22
DE2966210D1 (en) 1983-10-27
BR7908621A (pt) 1980-09-02
CA1124198A (en) 1982-05-25
ES487054A1 (es) 1980-06-16
AU526559B2 (en) 1983-01-20
JPS5593486A (en) 1980-07-15
US4265552A (en) 1981-05-05

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