US3633841A - Print ribbon drive and reversing device - Google Patents

Print ribbon drive and reversing device Download PDF

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Publication number
US3633841A
US3633841A US9153A US3633841DA US3633841A US 3633841 A US3633841 A US 3633841A US 9153 A US9153 A US 9153A US 3633841D A US3633841D A US 3633841DA US 3633841 A US3633841 A US 3633841A
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US
United States
Prior art keywords
ribbon
worm
translator
alternately
drive
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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 - Lifetime
Application number
US9153A
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English (en)
Inventor
Donald L Bumgardner
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Unisys Corp
Original Assignee
Burroughs Corp
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Publication date
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Publication of US3633841A publication Critical patent/US3633841A/en
Assigned to BURROUGHS CORPORATION reassignment BURROUGHS CORPORATION MERGER (SEE DOCUMENT FOR DETAILS). DELAWARE EFFECTIVE MAY 30, 1982. Assignors: BURROUGHS CORPORATION A CORP OF MI (MERGED INTO), BURROUGHS DELAWARE INCORPORATED A DE CORP. (CHANGED TO)
Assigned to UNISYS CORPORATION reassignment UNISYS CORPORATION MERGER (SEE DOCUMENT FOR DETAILS). Assignors: BURROUGHS CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41J33/40—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

Definitions

  • Uren ABSTRACT Print ribbon feed apparatus embodies a translator for alternately applying drive in opposite directions to one of a pair of print ribbon spools and includes mechanism to responsively remove drive from the wound spool and to apply drive to the unwound spool.
  • ribbon reversing devices that include cams which are activated by clutches of various types to disengage and engage ribbon spool drive mechanisms.
  • cams which are activated by clutches of various types to disengage and engage ribbon spool drive mechanisms.
  • clutches of various types to disengage and engage ribbon spool drive mechanisms.
  • devices are necessarily complex and are accordingly subject to decreased reliability and increased construction and maintenance costs.
  • An important aspect of the invention is the use of a crossthreaded worm and a cooperating pivotal translator as a means of completing the translation of a unidirectionally driven ribbon drive shaft as between its two spool-driving positions, such drive shaft having been partially translated by the reversing action of one of a pair of integral worms relative to the worm wheel associated with the fully wound ribbon spool, the completed translation of the drive shaft being effective to engage the opposite of the integral worms with the worm wheel associated with the unwound spool for responsive ribbon winding thereon.
  • cross-threaded worm Another important aspect of the invention is the character of the cross-threaded worm and the nature of the cooperation of the pivotal translator therewith, the cross-threaded worm having a plurality of thread segments effective for translatably receiving the translator as the drive shaft is drivenly rotated, such rotation serving to translate the shaft by means of the driving effect of the thread segments against the stationary translator.
  • Still another aspect of the invention is the use of resilient detent means to secure the engagement of the worm and worm wheel associated with the ribbon spool upon which the ribbon is being wound, such detent means being yieldably responsive to the translation of the driven ribbon drive shaft when the ribbon is fully wound on such spool to thereafter receive the engagement of the worm and worm wheel associated with the empty spool.
  • FIG. 1 is a perspective view of a print ribbon drive and reversing device embodying features of the invention
  • FIG. 2 is another perspective view of the device of FIG. 1,
  • FIG. 3 is a perspective view, partly in section and partially exploded, of a print ribbon spool and worm wheel assembly
  • FIG. 4 is a sectional view of a print ribbon spool and worm wheel assembly taken in the direction of the arrows 44 of FIG. 3,
  • FIG. 5 is a side view of the cross-threaded worm and the translator shown removed from the device
  • FIG. 6 is a sectional view taken in the direction of the arrows 6-6 of FIG. 5, and
  • FIG. 7 is a perspective view of the shaft driving mechanism shown removed from the device DETAILED DESCRIPTION OF THE INVENTION
  • the print ribbon drive and reversing apparatus shown has a supporting member 10 rotatably supporting a first worm wheel I2, a section worm wheel 14, a first ribbon spool 16 and a second ribbon spool 18, and translatably supporting also a rotatable shaft 20.
  • a first worm 22 and an oppositely threaded second worm 24 are affixed to the shaft 20, as are an ellipsoidally shaped member 26 and a corss-threaded worm 28, the member 26 comprising a first abutment 30 and a second abutment 32.
  • Pivotally mounted in the supporting member 10 is a translator 34 which is comparably associated with the cross-threaded worm 28.
  • the first worm wheel 12 is operatively connected to the first ribbon spool I6 and is spaced apart from the second worm wheel 14, the latter worm wheel being operatively connected to the second ribbon spool 18.
  • the shaft 20 is mounted tangentially adjacent the first and second worm wheels such that its longitudinal translations will alternately mesh the first worm 22 with the first worm wheel 12 and the second worm 24 with the second worm wheel 14.
  • the ellipsoidally shaped member 26 and cross-threaded worm 28 are affixed to the shaft 20 in spaced-apart relationship and at predetermined locations thereon, such predetermined locations providing cooperating relationship with a detent plunger 36 and with the translator 34 respectively, the translator and plunger both depending from mountings disposed in an elongated frame 38 of the supporting member 10.
  • each of the worm wheels 12 and 14 includes a ribbon spool drive shaft 40, which extends rotatably upward through a cylindrical, bearinglike opening formed in the frame 38 and an upwardly extending collar 42 disposed in contiguous relationship with a cylindrical projection 44 depending from the frame.
  • a compression ring 46 removably arranged on the outer surface of each of the collars 42 serves to assert a retarding drag as between the collar and the cylindrical projection 44 during rotation of the worm wheel, such drag tending to hold ribbon 48 taut on the spool from which it is being unwound.
  • a spool-mounting plate 50 is secured to the upper extremity of the spool drive shaft 44) by means of a screw 52 and a nut 54, the screw extending throughout the shaft 40 and outwardly from the plate 50.
  • a plurality of projections 56 formed in each spool-mounting plate 50 are slidably engageable with corresponding apertures 58 formed in the ribbon spool, for example, spools I6 and I8, a central aperture 60 of the spool being slidably and retainably accommodated by the upper extremity of the screw 52.
  • the shaft 20 is provided with a D-shaped cross section, as illustrated in FIG. 6.
  • a sleeve 62 having a D-shaped central aperture to slidably receive the shaft 20 is rotatably mounted between a pair of shaft-supporting members 64; and first bevel gear 66 is also provided with a D-shaped central aperture to receive the shaft 20, the bevel gear 66 being provided also with an integral, similarly apertured sleeve 68 which is rotatably mounted by means of a separate pair of shaft-supporting members 64.
  • the gear 66 is rotatably positioned between the outermost of said separate pair of shaft-supporting members and a slotted plate 70 depending from the frame 38.
  • the shaft 20 is positioned to slide tangentially adjacent the first and second worm wheels 12 and 14 respectively.
  • a second bevel gear 72 disposed in cooperating relationship with the first bevel gear 66, is affixed to one end of a connecting shaft 74 which is rotatably supported by a pair of supporting members 76 which also depend from the frame 38.
  • a spur gear 78 is affixed to the opposite end of the shaft 74 and is engageable with suitable shaft-rotating means (not shown), said latter means being effective to rotate the shaft 20 in a counterclockwise direction as viewed from its left end as shown in FIG. 1.
  • the first worm 22 is affixed to one end of the shaft 20, and the oppositely threaded second worm 24 is affixed to the opposite -end thereof, the length of the shaft being such that when one worm, for example, worm 22, is meshed with its associated worm wheel 12, the opposite worm, for example, worm 24, is positioned beyond its associated worm wheel 14.
  • the ellipsoidally shaped member 26 is affixed to the shaft 20, such that the first and second abutments 30 and 32 thereof are alternately presented to the detent plunger 36 as the shaft 20 translates, the detent plunger being slidably mounted in the frame 38 and yieldably urged downwardly by a spring (not shown) into contact with the member 26.
  • the pivotally mounted translator 34 is positioned by the frame 38 such that its lower portion is maintained in cooperating relationship with the crossthreaded worm 28, the pivotal axis of the translator 34 and the rotational axis of the shaft being mutually perpendicular and slightly offset one from the other.
  • the lowermost edge of the translator is semicircular in contour to present a conforming recess for rotational cooperation with the dwell portion of the cross-threaded worm 28.
  • This recess in the lowermost edge of the translator 34 presents a pair of downwardly directed arms 80 and 82 of predetermined difi'ering lengths, the ends of said arms presenting a semicircumferential diameter to said recess, such diameter being obtusely inclined to the pivotal axis of the translator 34.
  • the longer of these downwardly directed arms, designated 80 in the drawings, is disposed to the rear of the shaft 20, as viewed in FIG, l, the shorter arm 82 being disposed forwardly of the rotational axis of the shaft. 4
  • the cross-threaded worm 28 of the preferred embodiment of the invention is comprised of six separate thread segments as would be produced by the removal of portions of the intersecting areas of the two continuous cross threads, the extremities of each thread segment being provided with a dextral and a sinistral surface, the outer surfaces of the rightward and leftward thread segments presenting dextral and sinistral threads respectively to the translator 34 when said translator is located to the right and left thereof respectively.
  • the support provided the shaft 20 by the supporting members 63, and the support provided the connecting shaft 74 by the supporting members 76, are further complemented by retainers 84 slidably disposed in interiorally and transversely arranged grooves formed in the adjoining surfaces of pairs of such supporting members, said retainers being slidably insertable and removable from these grooves to thereby facilitate the assembly and disassembly of the shafts.
  • the first worm 22, being in mesh with the first worm wheel 12, is accordingly rotated in a counterclockwise direction in such manner as would rotate the worm wheel 12 in a counterclockwise direction were it free to so rotate. Since such rotation is limited, however, by the unwound state of the spool 18, the continued rotation of the worm 22 will cause a partial leftward translation of the shaft 20 as the worm 22 screws itself out of engagement with the worm wheel 12.
  • the detent plunger 36 yields to the camming force of the member 26; and the sinistral surface of the leftmost thread segment of the cross-threaded worm 28, in camming cooperation with the arm of the translator 34, serves to pivot the latter translator in a counterclockwise direction (when viewed from the top) to thereby steer the translator into the grooves or cutouts between the thread segments.
  • the shaft 20 continues to rotate, there thread segments, in camming cooperation with the stationary translator 34, will impart a leftward translating force to the shaft 20 and the worms 22 and 24, such force being perpetuated until the translator 34 assumes a relative position rightwardly disposed of the rightmost thread segment, and the worm 24 is disposed in cooperating relationship with the second worm wheel I4.
  • the abutment 32 of the member 26 will thereafter cooperate with the detent plunger 36 to effectively sustain the engagement of worm 24 and the worm wheel 14.
  • the worm wheel 14 and ribbon spool 18 are rotated in a clockwise direction to thereby wind the ribbon 48 onto the spool 18 and to unwind the ribbon from spool 16.
  • the worm wheel 14 is limited from further clockwise rotation due to the connection between the leftmost extremity of the ribbon 48 and the spool 16, continued rotation of the worm 24 causing the shaft 20 to be partially translated in a rightward direction until the worm 24 is disengaged from the worm wheel 14.
  • the detent plunger 36 again yields to the camming force of the member 26; and the dextral surface of the rightmost thread segment of the cross-threaded worm 28, in cooperation with the arm 80 of the translator 34, serves to pivot the latter translator in a clockwise direction (as viewed from the top) to thereby steer the translator arm 82 into the grooves or cutouts between the thread segments.
  • the rotating thread segments and stationary translator 34 will impart a rightward translating force to the shaft 20 and the worms 22 and 24, such force being perpetuated until the translator 34 assumes a relative position leftwardly disposed of the leftmost thread segment, and the worm 22 is disposed in cooperating relationship with the first worm wheel 12.
  • the abutment 30 of the member 26 will thereafter cooperate with the detent plunger 36 to effectively sustain the engagement of the worm 22 and the worm wheel 12.
  • the worm wheel 12 and ribbon spool 16 are rotated in a counterclockwise direction tothereby wind the ribbon 48 onto the spool 16 and to unwind the ribbon from the spool 18.
  • first and second spaced-apart driven means for winding an operably interconnecting web alternately and respectively therebetween;
  • driving means disengageably responsive to maximum web transfer for alternately driving said first and said second driven means
  • cross-threaded, screw-type translating means associated with said supporting means and with said driving means for coupling said latter means to an unwound one of said driven means upon disengagement from a wound one of said driven means;
  • detent means for effectively and alternately maintaining said driving means in coupled relationship with said first and said second driven means, said detent means having an ellipsoidally shaped member and a detent plunger yieldably urged into cooperation therewith, said ellipsoidally shaped member alternately presenting a first and a second abutment to said detent plunger in response to maximum web transfer between said first and said second driven means.
  • said driving means has a first and a second worm affixed to opposite ends of a translatable and rotatable shaft positioned tangentially adjacent said first and said second drive means, said shaft having a linear dimension in excess of said spaced-apart distance between said first and said second driven means such that said first and said second worms are alternately engageable with said first and said second driven means as said translatable shaft translates;
  • said translating means has a translator member pivotally mounted on said supporting means and cooperating with a cross-threaded worm operatively connected to said rotatable and translatable shaft of said driving means, the cooperation of said translator member with said crossthreaded worm being of an engageable nature and semicircumferential in character, the diametric axis of said semicircumferential engagement of said translator member being obtusely inclined to the pivotal axis of said translator member, thereby forming a pair of engaging arms of predetermined differing length.
  • translatable coupling means defined by claim 2 wherein the longer of said engaging arms is disposed opposite the pivotal axis of said translator member and opposite the rotational axis of said cross-threaded worm from the shorter of said engaging arms and is the arm farthest disposed from said pivotal axis.
  • a print ribbon drive and reversing device comprising:
  • first rotatable ribbon storing means for alternately accepting and dispensing print ribbon terminally attached thereto;
  • second rotatable ribbon storing means for alternately accepting and dispensing print ribbon terminally attached thereto and to said first ribbon storing means
  • said drive translating means mounted on said supporting means for alternately coupling said drive means to said first and said second ribbon storing means, said drive translating means including a rotatable cross-threaded worm and a pivotable translator, said rotatable cross-threaded worm and said pivotable translator of said drive translating means being cooperatively engageable, said engagement being semicircumferential in character, the diametric axis of said semicircumferential engagement of said translator being obtusely inclined to the pivotal axis of said translator, thereby forming a pair of engaging arms of predetermined differing length.
  • the print ribbon drive and reversing device defined by claim 4 wherein said drive means has a pair of worm wheels operatively connected to said first and said second ribbonstoring means, a translatable shaft disposed tangentially adjacent said pair of worm wheels, said shaft being unidirectionally rotatable, a pair of oppositely threaded and spaced-apart worms affixed to the outer extremities of said shaft to alternately rotate said worm wheels and said first and said second ribbon storing means in opposite directions to thereby wind print ribbons alternately onto each of said first and said second ribbon storing means, said worms being cooperatively and respectively associated with said pair of worm wheels such that one worm is disengaged from and outwardly disposed of its associated worm wheel when the opposite of said worms is cooperatively engaged with the other of said worm wheels; and additionally having detent means for effectively maintaining one of said worms in coupled relationship with an associated one of said worm wheels, said detent means having an ellipsoidally shaped member and a detent

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  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Advancing Webs (AREA)
US9153A 1970-02-06 1970-02-06 Print ribbon drive and reversing device Expired - Lifetime US3633841A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US915370A 1970-02-06 1970-02-06

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US3633841A true US3633841A (en) 1972-01-11

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US9153A Expired - Lifetime US3633841A (en) 1970-02-06 1970-02-06 Print ribbon drive and reversing device

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US (1) US3633841A (enrdf_load_stackoverflow)
JP (1) JPS497448B1 (enrdf_load_stackoverflow)
BE (1) BE762007A (enrdf_load_stackoverflow)
BR (1) BR7100610D0 (enrdf_load_stackoverflow)
CA (1) CA919611A (enrdf_load_stackoverflow)
DE (1) DE2103136A1 (enrdf_load_stackoverflow)
FR (1) FR2080491A5 (enrdf_load_stackoverflow)
GB (1) GB1276805A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889893A (en) * 1974-01-14 1975-06-17 Computer Peripherals Ribbon drive and control system
US4083445A (en) * 1975-05-15 1978-04-11 Ing. C. Olivetti & C., S.P.A. Ribbon reversal mechanism for an office machine
US5527462A (en) * 1994-11-15 1996-06-18 Delaware Capital Formation, Inc. Filter with axially movable wiper
US5993095A (en) * 1998-01-09 1999-11-30 International Business Machines Corporation Mechanical transmission

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1011772B (it) * 1974-04-24 1977-02-10 Olivetti & Co Spa Dispositivo di spostamento del nastro di scrittura per un gruppo di stampa di macchine per ufficio
JPS5247246U (enrdf_load_stackoverflow) * 1975-09-30 1977-04-04
JPH0645743A (ja) * 1992-07-24 1994-02-18 Matsushita Electric Ind Co Ltd 回路基板とそのハンダ付方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US568299A (en) * 1896-09-22 ellis
US762266A (en) * 1903-09-09 1904-06-14 Walter E Scott Type-writer ribbon-operating mechanism.
US833287A (en) * 1903-09-11 1906-10-16 James Mcdonnell Hutton Type-writer-ribbon-operating mechanism.
FR461764A (fr) * 1913-08-25 1914-01-10 Augustin Paul Gabriel Ernest F Appareil à rouleaux à mouvement inversible automatique
US2159727A (en) * 1935-07-11 1939-05-23 Myron D Markley Recording mechanism for vehicles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US568299A (en) * 1896-09-22 ellis
US762266A (en) * 1903-09-09 1904-06-14 Walter E Scott Type-writer ribbon-operating mechanism.
US833287A (en) * 1903-09-11 1906-10-16 James Mcdonnell Hutton Type-writer-ribbon-operating mechanism.
FR461764A (fr) * 1913-08-25 1914-01-10 Augustin Paul Gabriel Ernest F Appareil à rouleaux à mouvement inversible automatique
US2159727A (en) * 1935-07-11 1939-05-23 Myron D Markley Recording mechanism for vehicles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889893A (en) * 1974-01-14 1975-06-17 Computer Peripherals Ribbon drive and control system
US4083445A (en) * 1975-05-15 1978-04-11 Ing. C. Olivetti & C., S.P.A. Ribbon reversal mechanism for an office machine
US5527462A (en) * 1994-11-15 1996-06-18 Delaware Capital Formation, Inc. Filter with axially movable wiper
US5993095A (en) * 1998-01-09 1999-11-30 International Business Machines Corporation Mechanical transmission

Also Published As

Publication number Publication date
CA919611A (en) 1973-01-23
DE2103136A1 (de) 1971-08-19
GB1276805A (en) 1972-06-07
BE762007A (fr) 1971-07-01
FR2080491A5 (enrdf_load_stackoverflow) 1971-11-12
BR7100610D0 (pt) 1973-03-13
JPS497448B1 (enrdf_load_stackoverflow) 1974-02-20

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AS Assignment

Owner name: BURROUGHS CORPORATION

Free format text: MERGER;ASSIGNORS:BURROUGHS CORPORATION A CORP OF MI (MERGED INTO);BURROUGHS DELAWARE INCORPORATEDA DE CORP. (CHANGED TO);REEL/FRAME:004312/0324

Effective date: 19840530

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Owner name: UNISYS CORPORATION, PENNSYLVANIA

Free format text: MERGER;ASSIGNOR:BURROUGHS CORPORATION;REEL/FRAME:005012/0501

Effective date: 19880509