US3618869A - Servoing mechanism for improved typewriter ribbon spooling - Google Patents

Servoing mechanism for improved typewriter ribbon spooling Download PDF

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Publication number
US3618869A
US3618869A US51233A US3618869DA US3618869A US 3618869 A US3618869 A US 3618869A US 51233 A US51233 A US 51233A US 3618869D A US3618869D A US 3618869DA US 3618869 A US3618869 A US 3618869A
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US
United States
Prior art keywords
core
web
ribbon
drive member
contact
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 - Lifetime
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US51233A
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English (en)
Inventor
David R Cialone
Clifford E Herrick
George T Slaughter
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International Business Machines Corp
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International Business Machines Corp
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    • 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
    • B41J33/26—Ribbon-feed devices or mechanisms with drive applied directly to ribbon by rollers engaging 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
    • B41J32/00—Ink-ribbon cartridges

Definitions

  • a web-spooling apparatus for winding a thin web on a core is constructed to control any tendency of the web to telescope.
  • a drive roller rides on the periphery of the web as it winds the web on the core.
  • the drive roller includes web-penetrating radial spikes and has a pair of flanges at the top and bottom which extend radially beyond the spikes and contact the-edges of the web should the web tend to move axially off the core.
  • the core is mounted on a spindle in such a way as to permit the core to yaw about the spindle.
  • This invention relates to typewriter ribbons and more particularly to a ribbon takeup spool device.
  • typewriter ribbons tending toward ribbons which afford substantially increased yields and hence longer intervals between ribbon replacement.
  • improvedyield ribbons necessarily involve the use of much thinner ribbons than those which are common in present commercial use.
  • the fragility of such thin, high-yield ribbons necessitates ribbon-handling mechanism which are designed for minimum stress, because such thin ribbons typically exhibit reduced tensile strength, high compliance, and unusually marked changes in such properties with temperature and humidity.
  • Thin ribbons such as the polymer matrix ribbons described, for example, in U.S. Pat. No. 3,413,184 pose an additional problem in takeup spooling. Because of the extreme length of the ribbon to be taken up, together with compliance characteristics which prohibit the use of edge-guiding techniques effective with more rigid or thicker ribbons, considerable difficulty is experienced in the takeup spooling operation. A characteristic difficulty is known as telescoping. If ribbon that is contained in a ribbon cartridge telescopes, i.e. moves axially during winding, it will bind tightly against the top or bottom of the cartridge and causes either excessive stress on the drive mechanism or ribbon advance failure or both.
  • an apparatus for winding a thin ribbon on a core and controlling the telescoping of the web on the core comprising a spiked drive roller which contacts the face of the web wound on the core and feeds the web to the core.
  • the drive roller and core are mounted to move apart as the diameter of the web on the core increases.
  • the drive roller is located to contact the web in the hemicircle defined between the point where the web enters the core and about 180 in the direction of rotation of the core.
  • the core is mounted for rotation by means which permits the core to yaw about the nominal axis of rotation.
  • the drive roller includes guide flanges at its top and bottom which are adapted to contact the edges of the web should the web begin to telescope on the core.
  • FIG. 1a is a schematic top view of an embodiment of the invention in a first condition.
  • FIG. lb is a schematic elevational view with parts broken away of an embodiment of the invention in the condition illustrated in FIG. la.
  • FIG. 2a is a schematic top view of the embodiment of the invention illustrated in FIGS. 1a and lb in a broken condition.
  • FIG. 2b is an elevational view with parts broken away of the embodiment of the invention in the condition shown in FIG. 20.
  • FIG. 3a is a schematic top view of the embodiment of the invention illustrated in FIGS. 1a and 1b in a third condition.
  • FIG. 3b is an elevational view with parts away of the embodiment of the invention in the condition illustrated in FIG. 3a.
  • FIG. 4 is an exploded isometric view with parts broken away of an embodiment of the invention including a ribbon cartridge.
  • FIG. 5 is an elevational view partially in section with parts broken away of the cartridge illustrated in FIG. 4.
  • FIGS. la and 1b, 2a and 2b and 3a and 3b illustrate an embodiment of the invention at several stages in the, spooling process.
  • the angular deflections are somewhat exaggerated for the sake of illustration.
  • ribbon I1 is directed around guide roll or post 10 to the periphery of takeup core 14 which is mounted on a takeup spool stud 13 with a clearance of about 0.002-0.004 in. such that core 14 can yaw about stud 13.
  • the surface of ribbon 11 would on takeup core 14 is penetrated by spikes 15 on a cylindrical drive member or roller 16 having a pair of flanges 17 and 19 that extend radially outward beyond the spikes 15.
  • the drive roller 16 is located to contact the ribbon at some point in a hemicircle beginning at where the ribbon contacts the wound portion of the ribbon on the core and continuing around in the direction of rotation of the core.
  • FIG. lb illustrates a first condition of the takeup core 14 and ribbon 11.
  • the takeup core 14 and ribbon 11 bear the relationship that takeup core 14 is tilted counterclockwise. Because of the tilt, ribbon 11 will move toward the bottom flange 17 of the drive roller until edge 18 contacts flange 17. This downward tendency will result because friction between the ribbon web 11 and the spooled ribbon l2 acts to maintain the relative vertical relationship of the point of contact between web 11 and spooled ribbon 12.
  • the portion 12 of the ribbon wound on the core will be as is shown in FIGS. 2a and 2b with the contact between edge 18 and flange 17 causing the core 14 to yaw about stud 13 to a position where the axis 20 of the core 14 is moved to the vertical.
  • the ribbon will now wind parallel to the edge of the core 14.
  • the wound portion 12 of ribbon 11 may have a somewhat nonparallel configuration on takeup core 14, the flanges l7 and 19 on drive roller 16 confine the ribbon and prevent the ribbon from binding against the adjust mechanism such as the walls of a cartridge in which the ribbon is enclosed. Excessive binding forces will not be encountered because the drive roller 16 and flanges 17 and 19 are continually moving outwardly from the takeup core so that there'are no cumulative forces between the flanges and the wound portion 12 on core 14 due to previous telescoping.
  • FIGS. 4 and 5 illustrate an embodiment of the invention contained in an easily mountable, self-contained ribbon cartridge 27 having a supply 20 of ribbon 21 on a supply spool 23.
  • the cartridge and ribbon advance mechanism are shown for example, in application Ser. No. 752,096 filed July I6, 1968.
  • Cartridge 27 as a top portion 26 and a bottom portion 28 and is mounted on the print carriage 22 of a typewriter and held in place by clips 30 at each end which enter slots 32.
  • the ribbon exits from a slot (not shown) in the sidewall 25 of cartridge 27 and is adapted to be passed through the ribbon guide mechanism (not shown) at the print point of the typewriter and then back into cartridge 27 through a second slot 29, around ribbon guide post 31 and then to the periphery of takeup core 24.
  • the drive roller 35 enters the cartridge 27 through an elongated curved slot 38, as cartridge is engaged onto the ribbon drive mechanism.
  • Drive roller 35 is attached to and adapted to be incrementally rotated by the printing machine ribbon advance mechanism.
  • Drive roller 35 has a series of spikes 36 on its driving surface for penetrating ribbon 21.
  • Drive roller 35 is urged into contact with spool portion 34 by a spring (not shown) and is permitted to move away from the takeup core 24 as the diameter of the wound ribbon increases.
  • the shape of slot 38 permits the drive roller 35 to move without contacting the cartridge 27.
  • Flanges 37 and 39 on the top and bottom of drive roller 35 are adapted to contact the edges of ribbon 21 if the ribbon tends to telescope on takeup core 24. Core 24 as illustrated in FIG.
  • FIGS. la and lb, 2a and 2b, and 3a and 3b The servoing operation of the apparatus is as is described in the embodiment shown in FIGS. la and lb, 2a and 2b, and 3a and 3b with the ribbon contacting the top or bottom walls 26 and 28 of cartridge 27. Therefore, binding, tearing or folding of the ribbon due to the telescoping on the core is avoided.
  • Apparatus for winding a web on a core comprising:
  • a rotatable drive member which is mounted to contact the periphery of the web wound on the core and feed the web to the core
  • a rotatable drive member which is mounted to contact the periphery of the web wound on the core at a point in a hemicircle defined by the point where the web contacts the wound portion and a point about from where the web contacts the wound portion in the direction of rotation of the core and feed the web to the core,
  • mounting means to mount the drove member and core such that the said drive member and core move apart as the diameter of the web wound on the core increases
  • a spindle for mounting said core so as to permit the core to yaw about said spindle
  • a pair of flanges on said drive member located at the top and bottom, said flanges being adapted to contact the edges of the web if the web should telescope on said core such that contact between said web and one of said flanges will cause said core to yaw about said spindle and thereby correct the telescoping condition.
  • An inked ribbon feed mechanism including:
  • a rotatable mounted supply spool a spindle
  • an inked ribbon having one end attached to said supply spool and its other end attached to said takeup spool;
  • said engaging means having sufficient traction with said ribbon to provide the total driving force for winding said ribbon on said takeup spool and said engaging means having guide means located at the top and bottom of said engaging means, said guide means being adapted to contact the edges of said ribbon if the ribbon should telescope relative to said core to correct the telescoping condition.
  • said engaging means is a drive roller having pointed projections thereon for penetrating said inked ribbon on said takeup spool to provide positive engagement therewith and with sufficient traction to provide the total driving force of said ribbon, said drive roller having circular flanges located at the top and bottom of said roller and extending radially outward of said pointed projections,
  • a cartridge said cartridge having a top wall, a bottom wall and a sidewall connecting said top and bottom walls removably mounted on said base plate; said supply spool being rotatably mounted in said cartridge;
  • said takeup spool being rotatably mounted in said cartridge
  • said drive roller is supported by said base plate and extends through a curved slot in the bottom wall of said cartridge
  • said circular flanges are located between said top wall and said bottom wall of said cartridge.

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  • Impression-Transfer Materials And Handling Thereof (AREA)
US51233A 1970-06-30 1970-06-30 Servoing mechanism for improved typewriter ribbon spooling Expired - Lifetime US3618869A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5123370A 1970-06-30 1970-06-30

Publications (1)

Publication Number Publication Date
US3618869A true US3618869A (en) 1971-11-09

Family

ID=21970100

Family Applications (1)

Application Number Title Priority Date Filing Date
US51233A Expired - Lifetime US3618869A (en) 1970-06-30 1970-06-30 Servoing mechanism for improved typewriter ribbon spooling

Country Status (11)

Country Link
US (1) US3618869A (xx)
JP (1) JPS5113060B1 (xx)
BE (1) BE766572A (xx)
CA (1) CA945972A (xx)
CH (1) CH524465A (xx)
DE (1) DE2131128C3 (xx)
ES (1) ES392707A1 (xx)
FR (1) FR2095596A5 (xx)
GB (1) GB1284373A (xx)
NL (1) NL169285C (xx)
SE (1) SE368177B (xx)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731781A (en) * 1968-07-16 1973-05-08 Ibm Ribbon supply cartridge
US3831731A (en) * 1972-10-27 1974-08-27 Burroughs Corp Self-tensioning and re-inking ribbon cartridge for endless ribbons
US3877561A (en) * 1971-10-04 1975-04-15 Olivetti & Co Spa Cartridge for the carbon ribbon of a typewriter, calculating machine, accounting machine or like office machines
US4131373A (en) * 1977-06-10 1978-12-26 Liquid Paper Corporation Typewriter ribbon cartridge
FR2415539A1 (fr) * 1978-01-30 1979-08-24 Exxon Research Engineering Co Cartouche a ruban pour machine imprimante
DE3418734A1 (de) * 1984-05-19 1985-11-21 Olympia Werke Ag, 2940 Wilhelmshaven Farbbandkassette fuer schreib- oder aehnliche bueromaschinen
US5044794A (en) * 1987-04-25 1991-09-03 Canon Kabushiki Kaisha Ink ribbon cassette
US5634606A (en) * 1994-09-06 1997-06-03 Koenig & Bauer-Albert Aktiengesellschaft Press-on roller

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1024899B (it) * 1974-11-25 1978-07-20 Olivetti Ing C S P A Cartuccia amovibile per un nastro careonato di macchine per scrivere contabili telescriventi e simi li macchine per ufficio
US4212550A (en) * 1978-07-14 1980-07-15 International Business Machines Corporation Ribbon storage mechanism having eccentrically mounted feeding elements
JPS55140986U (xx) * 1979-03-28 1980-10-08

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731781A (en) * 1968-07-16 1973-05-08 Ibm Ribbon supply cartridge
US3877561A (en) * 1971-10-04 1975-04-15 Olivetti & Co Spa Cartridge for the carbon ribbon of a typewriter, calculating machine, accounting machine or like office machines
US3831731A (en) * 1972-10-27 1974-08-27 Burroughs Corp Self-tensioning and re-inking ribbon cartridge for endless ribbons
US4131373A (en) * 1977-06-10 1978-12-26 Liquid Paper Corporation Typewriter ribbon cartridge
FR2415539A1 (fr) * 1978-01-30 1979-08-24 Exxon Research Engineering Co Cartouche a ruban pour machine imprimante
DE3418734A1 (de) * 1984-05-19 1985-11-21 Olympia Werke Ag, 2940 Wilhelmshaven Farbbandkassette fuer schreib- oder aehnliche bueromaschinen
US5044794A (en) * 1987-04-25 1991-09-03 Canon Kabushiki Kaisha Ink ribbon cassette
US5634606A (en) * 1994-09-06 1997-06-03 Koenig & Bauer-Albert Aktiengesellschaft Press-on roller

Also Published As

Publication number Publication date
GB1284373A (en) 1972-08-09
NL169285C (nl) 1982-07-01
FR2095596A5 (xx) 1972-02-11
DE2131128B2 (xx) 1974-04-11
BE766572A (fr) 1971-09-16
DE2131128A1 (de) 1972-01-05
NL169285B (nl) 1982-02-01
CH524465A (de) 1972-06-30
NL7108616A (xx) 1972-01-03
SE368177B (xx) 1974-06-24
DE2131128C3 (de) 1974-11-14
CA945972A (en) 1974-04-23
ES392707A1 (es) 1973-07-01
JPS5113060B1 (xx) 1976-04-24

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