US3854670A - Device for the automatic reversal of the lengthwise motion of the ink-ribbon in typewriters and printers - Google Patents

Device for the automatic reversal of the lengthwise motion of the ink-ribbon in typewriters and printers Download PDF

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Publication number
US3854670A
US3854670A US00390535A US39053573A US3854670A US 3854670 A US3854670 A US 3854670A US 00390535 A US00390535 A US 00390535A US 39053573 A US39053573 A US 39053573A US 3854670 A US3854670 A US 3854670A
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US
United States
Prior art keywords
gear
driven
spool
driving
shaft
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Expired - Lifetime
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US00390535A
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English (en)
Inventor
U Bertolazzi
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.)
Bull HN Information Systems Italia SpA
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Honeywell Information Systems Italia SpA
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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
    • B41J33/40—Ribbon-feed devices or mechanisms with arrangements for reversing the feed direction
    • B41J33/44—Ribbon-feed devices or mechanisms with arrangements for reversing the feed direction automatically
    • B41J33/51—Ribbon-feed devices or mechanisms with arrangements for reversing the feed direction automatically and characterised by the use of particular reversing control means
    • B41J33/516—Ribbon-feed devices or mechanisms with arrangements for reversing the feed direction automatically and characterised by the use of particular reversing control means using a reversing-feeler responsive to the tension of the ribbon
    • 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
    • B41J33/16—Ribbon-feed devices or mechanisms with drive applied to spool or spool spindle
    • B41J33/22—Ribbon-feed devices or mechanisms with drive applied to spool or spool spindle by gears or pulleys
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19219—Interchangeably locked
    • Y10T74/19358—Laterally slidable gears
    • Y10T74/19367—Swinging carriage

Definitions

  • a drive system for the automatic reversal of the motion of ink ribbons includes a driving gear which is mounted on a base plate through elastic return means,
  • First and second driven gears are alternately engaged with a planentary gear meshed with the driving gear.
  • deflection of the elastic return means causes relative displacement of the driving and driven gears to permit the planetary gear to rotate about the driving gear and engage the other driven gear.
  • the present invention relates to a device for the automatic reversal of the lengthwise motion of the ink ribbon in typewriters, teleprinters, and high speed printers as employed in data processing and related systems.
  • Such printing devices usually comprise a single or two color ink ribbon, a finite length of which, wound on a spool, is made to unwind, in correspondance with the printing operation, and is wound up ona second take-up spool.
  • Both spools are mounted on shafts, each one of which selectively controls the winding up of the ribbon on a corresponding spool.
  • the shafts are usually driven, in the ordinary typewriter, by a ratchet device, associated with the printing bars; but in more sophisticated apparatus, they are preferably driven by an electrical motor energized during the printing operations.
  • the ends of the ribbon are usually secured to the spools by suitable hooking devices.
  • the present invention provides a reversal device satisfying these requirements.
  • the device comprises substantially a driving spur gear, a planetary gear driven by said driving gear, two driven gears for directly and indirectly driving the spools, selectively meshing with, said planet gear, and an elastic supporting memeber for said driving gear, for allowing a transverse displacement of said driving gear with respect to said driven gears, said displacement being normally prevented by the elastic reaction of the supporting member, and being effected as a consequence of the increase in the resisting torque developed by the driven wheel when the ribbon is entirely unwound from a spool.
  • This transverse displacement of the driving gear causes the planet gear to disengage from the formerly engaged driven gear and to engage the formerly disengaged driven gear, thus causing the ribbon to be wound up in the reverse direction.
  • FIG. 1 shows a perspective view of the preferred embodiment of the device.
  • FIG. 2 schematically shows a possible way of winding up and unwinding the ink ribbon.
  • FIG. 3 schematically shows a first alternative embodiment of the device using face gears.
  • FIG. 4 schematically shows a second alternative embodiment of the device.
  • FIG. 1 shows a perspective view of a preferred embodiment of the device according to the invention.
  • a base plate 1 supports two driven shafts 2 and 3, rotatably journalled thereupon, and a pin 4.
  • Two spur gears 5 and 6 are keyed respectively toshafts 2 and 3, and a third gear 7 is freely pivoted on pin 4 and in mesh with gear 6.
  • the upper ends of shafts 2 and 3 are provided with support washers 8 and 9 and clutch keys l0 and 11 for receiving two take-up spools'l2 and 13 for the ink ribbon (R).
  • a supporting member 14 is elastically mounted on base plate 1 through elastic return means, for instance, a flat spring 15.
  • a driving shaft 16' is rotatably journalled in supporting member 14, and a driving gear 17 is keyed to shaft 16.
  • An electrical motor M drives shaft 16.
  • a planet gear 18, meshing withdriving gear 17, is secured by suitable means, for instance by a pair of brackets 19, to driving shaft 16.
  • One bracket 19 is shown above gears 17 and 18, and the other is positioned directly below these gears in like position.
  • Each of the brackets is provided with a hole near each end, one hole receiving shaft 16 and the other hole receiving a shaft for rotation of gear 18.
  • gear 18 is free to planet gear 18, when the supporting member under the action of the return spring 15 is in the rest position.
  • driving gear 17 is kept rotating in the direction shown by the arrow F, under the action of motor M. It is further assumed that the planet gear is in a random position, for instance the one shown by dashed lines 18, and is neither engaged by gear 5 nor by gear 7. Due to the friction between the teeth of wheels 18 and 17, planetary gear 18, instead of rotating on its axis, is driven in a planetary motion around gear 17, in the direction of rotation of the same, and arrives at the position represented in full line in the drawing, where it meshes with gear 5.
  • gear 5 is forced to rotate in the direction shown by the arrow F
  • the spool 12 inserted on shaft 2 winds up the ink ribbon.
  • the end of the ink ribbon firmly fixed to the spool 13,,will exert a braking torque preventing any further rotation of the spool 12, and stopping the gear 5.
  • the driving gear 17 and the planetary gear 18 go on rotating, the planetary gear 18 being forced to rotate around the center of rotation C corresponding to the contact generatrix between the pitch lines of the gears 5 and 18.
  • This rotation generates a force on the driving shaft 16 and on the supporting member 14 which overcomes the action of the elastic return member and which therefore removes the shaft 16 from the shaft 2 by the distance needed for the planetary gear to pass between gear 17 and gear until it disengages from gear 5.
  • the gear 18 continues its planetary motion until it meshes with the gear 7, assuming the position 18" indicated by dashed line.
  • the gear 7 will therefore rotate in the sense indicated by the arrow F and will transmit the rotary motion to gear 6, which, in turn, rotating in the direction shown by the arrow F will wind up the ink ribbon on the spool 13.
  • a third gear 7 is not strictly needed for the invention. Its use depends only on the circumstance that it is required to drive alternately the two shafts 2 and 3 in opposed directions of rotation. However, the direction of rotation of the shafts may be the same, if the device is used for the motion reversal of the ink ribbon, or if used for different purposes as well. This is schematically illustrated for example in FIG. 2 which clearly shows how the ink ribbon may be wound up and unwound by two spools having the same direction of rotation.
  • the times required for inverting the motion are different in the two cases: the case of the planetary gear disengaging from gear 5 and meshing with gear 7 and the case of the planetary gear disengaging from gear 7 and meshing with gear 5. If it is required that the reversal times be equal, or at least approximately equal, it is possible to arrange several planetary gears, or to locate the shaft 16 of the driving gear in a position intermediate between shaft 2 and pin 4, providing elastical return means which allows the shaft to move in both senses along the direction defined by the alignment of the shafts 2, l6 and 4. It may also be remarked that the toothed wheels may be replaced by friction wheels.
  • all shafts are parallel and the gears are all spur gears, other arrangements may be provided, wherein some shafts are transversely located and the gears may be conical or face gears.
  • FIG. 3 shows, as an example and in schematic form, an arrangement employing spur and face gears and mutually orthogonal shafts.
  • two face gears 20 and 21, keyed respectively to shafts 22 and 23, are facing themselves at a suitable distance.
  • the driving gear 24 and the associated planetary gear 25 are interposed between the face gears and have their axis perpendicular to the shafts 22 and 23. If the distance between each of face gears 20 and 21 and the driving gear 24 is smaller than the diameter of the planetary gear, the same conditions already described are obtained.
  • the shaft of the driving gear should be provided with elastical return means which, by the action of a suitable thrust, allows the driving gear to move along the direction of the arrows F F
  • the gears 20 and 21 may be maintained in the shown positionby axial springs, and be able to slide in the axial direction. It is clear that the essential condition for the operation of the device is that of a relative displacement between the driving gear and the driven gears, to allow the passage of the planetary gear.
  • FIG. 3 shows, in addition, that the driven gears 20 and 21 may be keyed to the same shaft: that means that by this device it is possible to drive alternately a single shaft in both opposed directions.
  • the planetary gear 31 may mesh with one of the mutually engaged driven gears 33 and 34. Therefore, as the driving gear 36 rotates in the direction indicated by the arrow F and the planetary gear meshes with gear 33, and shaft 35 of this gear is made to rotate in the direction of the arrow F On the other hand, as the planetary gear meshes with gear 34, the direction of rotation of the shaft 36 is the one indicated by the arrow F It is thus possible to cause the alternating motion in both directions'of the shaft 35, the reversal of the motion being caused by a suitable increase of the resistant torque.
  • the device according to the invention is therefore adapted not only for the reversal of the motion of an ink ribbon, but also for all cases wherein the alternating motion of a shaft in both directions of rotation, or an alternating and mutually exclusive motion of two shafts are required.
  • a printing device including a first take-up spool mounted on a first shaft; a second take-up spool mounted on a second shaft; a base plate supporting said shafts; an ink ribbon extending from one spool to the other spool and adapted to be wound on one spool and unwound from the other spool and vice versa; and drive means for alternately driving a first driven gear coupled to drive said first shaft and a second driven gear coupled to drive said second shaft, said drive means comprising;
  • a printing device including a first take-up spool mounted on a first shaft; a second take-up spool mounted on a second shaft; a base plate supporting said shafts; an ink ribbon extending from one spool to the other spool and adapted to be wound on one spool and unwound from the other spool and vice versa; and drive means for alternately driving a first driven gear coupled to drive said first shaft and a second driven gear coupled to drive said second shaft, in response to an increase in the resistant torque applied to the gear being driven, said drive means comprising:
  • said drive means reverses the motion of said ink ribbon and further comprises a third driven gear permanently engaged with said second driven gear, said first and said second shafts being respectively integral with said first and said third gear.

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  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Transmission Devices (AREA)
  • Retarders (AREA)
US00390535A 1972-09-01 1973-08-22 Device for the automatic reversal of the lengthwise motion of the ink-ribbon in typewriters and printers Expired - Lifetime US3854670A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT28733/72A IT967080B (it) 1972-09-01 1972-09-01 Dispositivo di inversione automa tica del movimento longitudinale del nastro inchiostrato in macchi ne da scrivere e similari

Publications (1)

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US3854670A true US3854670A (en) 1974-12-17

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US00390535A Expired - Lifetime US3854670A (en) 1972-09-01 1973-08-22 Device for the automatic reversal of the lengthwise motion of the ink-ribbon in typewriters and printers

Country Status (6)

Country Link
US (1) US3854670A (en:Method)
JP (1) JPS4964767A (en:Method)
DE (1) DE2344746A1 (en:Method)
FR (1) FR2198586A5 (en:Method)
GB (1) GB1386063A (en:Method)
IT (1) IT967080B (en:Method)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034619A (en) * 1975-01-22 1977-07-12 Renato Seregni Motion reversal device for mechanisms for compact cassettes, moving spool arrangements and the like
US4046334A (en) * 1974-11-06 1977-09-06 Ricoh Co., Ltd. Automatic reversal mechanism
US4139167A (en) * 1976-05-11 1979-02-13 Olympus Optical Co., Ltd. Cassette tape recorder
US4147314A (en) * 1977-12-14 1979-04-03 Traulsen David E Winding tool for magnetic tape cassettes
US4154144A (en) * 1977-06-17 1979-05-15 Lyman George F Milling machine power feed
US4182576A (en) * 1976-06-23 1980-01-08 Kabushiki Kaisha Suwa Seikosha Ink-ribbon reversing device
US4202513A (en) * 1977-06-08 1980-05-13 Olympus Optical Co., Ltd. Tape end detector for reel driven cassette tape recorder
US5096315A (en) * 1989-02-02 1992-03-17 Alps Electric Co., Ltd. Ink ribbon winding mechanism
US5133614A (en) * 1989-04-07 1992-07-28 Mannesmann Aktiengesellschaft Device for driving a printer print-head carriage having a belt tensioning device and a ribbon drive clutch
US5150630A (en) * 1990-05-23 1992-09-29 Sharp Kabushiki Kaisha Power switching apparatus with power switching timing
US5276478A (en) * 1992-05-19 1994-01-04 Eastman Kodak Company Method and apparatus for optimizing depth images by adjusting print spacing
WO1996041724A1 (de) * 1995-06-09 1996-12-27 Siemens Nixdorf Informationssysteme Ag Antriebseinrichtung für eine farbbandkassette
US6070482A (en) * 1997-04-21 2000-06-06 Nidec Copal Corporation Gear module
US6722648B2 (en) * 2000-09-29 2004-04-20 Brother Kogyo Kabushiki Kaisha Mechanism for forwardly and reversely feeding recording medium
US20050036812A1 (en) * 2003-08-12 2005-02-17 Carriere Richard L. Printer with a pivoting gear mechanism
WO2014074780A1 (en) * 2012-11-12 2014-05-15 Siemens Healthcare Diagnostics Inc. Single drive mechanism

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2915334A1 (de) * 1979-04-14 1980-10-16 Triumph Werke Nuernberg Ag Farbbandtransportvorrichtung fuer schreib- oder druckwerke
FR2528929B1 (fr) * 1982-06-17 1988-04-08 Sagem Perfectionnements apportes a des dispositifs mecaniques d'entrainement selectif d'au moins deux arbres menes a partir d'un arbre menant unique, notamment pour le deplacement longitudinal d'un ruban encreur dans une machine imprimante
JPS59143667A (ja) * 1983-02-07 1984-08-17 Oki Electric Ind Co Ltd シリアルプリンタ
JPS6053271A (ja) * 1983-08-31 1985-03-26 Nippon Denso Co Ltd 動力伝達装置
WO2020215231A1 (zh) * 2019-04-24 2020-10-29 深圳市嗨兴科技有限公司 一种线材收纳结构及方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2583385A (en) * 1947-01-11 1952-01-22 Morse Instr Company Automatically operated film winding mechanism
US2621864A (en) * 1947-01-21 1952-12-16 Fairchild Camera Instr Co Reversible winder for strip film
US2896873A (en) * 1953-07-15 1959-07-28 Porter Co Inc H K Vehicle destination sign mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2583385A (en) * 1947-01-11 1952-01-22 Morse Instr Company Automatically operated film winding mechanism
US2621864A (en) * 1947-01-21 1952-12-16 Fairchild Camera Instr Co Reversible winder for strip film
US2896873A (en) * 1953-07-15 1959-07-28 Porter Co Inc H K Vehicle destination sign mechanism

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4046334A (en) * 1974-11-06 1977-09-06 Ricoh Co., Ltd. Automatic reversal mechanism
US4034619A (en) * 1975-01-22 1977-07-12 Renato Seregni Motion reversal device for mechanisms for compact cassettes, moving spool arrangements and the like
US4139167A (en) * 1976-05-11 1979-02-13 Olympus Optical Co., Ltd. Cassette tape recorder
US4182576A (en) * 1976-06-23 1980-01-08 Kabushiki Kaisha Suwa Seikosha Ink-ribbon reversing device
US4202513A (en) * 1977-06-08 1980-05-13 Olympus Optical Co., Ltd. Tape end detector for reel driven cassette tape recorder
US4154144A (en) * 1977-06-17 1979-05-15 Lyman George F Milling machine power feed
US4147314A (en) * 1977-12-14 1979-04-03 Traulsen David E Winding tool for magnetic tape cassettes
US5096315A (en) * 1989-02-02 1992-03-17 Alps Electric Co., Ltd. Ink ribbon winding mechanism
US5133614A (en) * 1989-04-07 1992-07-28 Mannesmann Aktiengesellschaft Device for driving a printer print-head carriage having a belt tensioning device and a ribbon drive clutch
US5150630A (en) * 1990-05-23 1992-09-29 Sharp Kabushiki Kaisha Power switching apparatus with power switching timing
US5276478A (en) * 1992-05-19 1994-01-04 Eastman Kodak Company Method and apparatus for optimizing depth images by adjusting print spacing
WO1996041724A1 (de) * 1995-06-09 1996-12-27 Siemens Nixdorf Informationssysteme Ag Antriebseinrichtung für eine farbbandkassette
US6070482A (en) * 1997-04-21 2000-06-06 Nidec Copal Corporation Gear module
US6289758B1 (en) * 1997-04-21 2001-09-18 Nidec Copal Corporation Gear module
US6722648B2 (en) * 2000-09-29 2004-04-20 Brother Kogyo Kabushiki Kaisha Mechanism for forwardly and reversely feeding recording medium
US20050036812A1 (en) * 2003-08-12 2005-02-17 Carriere Richard L. Printer with a pivoting gear mechanism
US7070347B2 (en) * 2003-08-12 2006-07-04 Brady Worldwide, Inc. Printer with a pivoting gear mechanism
JP2007502221A (ja) * 2003-08-12 2007-02-08 ブレイディー ワールドワイド インコーポレイテッド 枢動ギア機構を有するプリンタ
WO2014074780A1 (en) * 2012-11-12 2014-05-15 Siemens Healthcare Diagnostics Inc. Single drive mechanism

Also Published As

Publication number Publication date
IT967080B (it) 1974-02-28
GB1386063A (en) 1975-03-05
FR2198586A5 (en:Method) 1974-03-29
JPS4964767A (en:Method) 1974-06-22
DE2344746A1 (de) 1974-03-07

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