US3788442A - Erase ribbon feed - Google Patents

Erase ribbon feed Download PDF

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Publication number
US3788442A
US3788442A US00266764A US3788442DA US3788442A US 3788442 A US3788442 A US 3788442A US 00266764 A US00266764 A US 00266764A US 3788442D A US3788442D A US 3788442DA US 3788442 A US3788442 A US 3788442A
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United States
Prior art keywords
ribbon
erase
span
erase ribbon
impact
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Expired - Lifetime
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US00266764A
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English (en)
Inventor
R Lehnhardt
J Schaefer
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IBM Information Products Corp
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International Business Machines Corp
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Assigned to MORGAN BANK reassignment MORGAN BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: IBM INFORMATION PRODUCTS CORPORATION
Assigned to IBM INFORMATION PRODUCTS CORPORATION, 55 RAILROAD AVENUE, GREENWICH, CT 06830 A CORP OF DE reassignment IBM INFORMATION PRODUCTS CORPORATION, 55 RAILROAD AVENUE, GREENWICH, CT 06830 A CORP OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL BUSINESS MACHINES CORPORATION
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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
    • B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
    • B41J35/22—Mechanisms permitting the selective use of a plurality of ink ribbons
    • B41J35/23—Mechanisms permitting the selective use of a plurality of ink ribbons with two or more ribbon guides
    • 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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/26—Devices, non-fluid media or methods for cancelling, correcting errors, underscoring or ruling
    • B41J29/36—Devices, non-fluid media or methods for cancelling, correcting errors, underscoring or ruling for cancelling or correcting errors by overprinting
    • 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
    • B41J33/04—Ribbon arrangements mounted on moving carriages

Definitions

  • ABSTRACT An erase ribbon feed mechanism incrementally feeds ribbon both before and after, but not during print impact to break an adhesive type erase ribbon loose from adjacent structures such as a card holder to which it may have become attached.
  • the mechanism is thus made suitable for feeding an adhesive erase ribbon without creating shedding conditions that would make it unsuitable for feeding a cover-up type erase ribbon.
  • the card holder is made of polytetraflouroethylene and includes surface contact minimizing ridges adjacent the path of the erase ribbon. Where the ribbon lift action increases the span length of the erase ribbon, the feed occurring after impact is designed to take-up ribbon at a rate at least as great as the rate of decrease in ribbon span length to prevent accumulation of slack in the ribbon span.
  • Typewriters having an erase ribbon mechanism employing either an adhesive, character lifting surface, or an over print, character cover-up surface have been proposed in various forms.
  • the use of an adhesive material to lift an erroneous character from paper has the distinct advantage over a cover-up erasing material in that the color of the paper printed on is of no consequence.
  • An adhesive ribbon is more difficult to handle than a cover-up ribbon due to its tendency to become attached to adjacent structure.
  • US. Pat. No. 3,724,633 discloses a feed system for an adhesive ribbon including a tension control system that positively retains tension in an adhesive ribbon to minimize or eliminate a loose ribbon span that could become attached to an adjacent structure of the typewriter.
  • the mechanism for feeding an erase ribbon be capable of feeding a cover-up erase ribbon as well as an adhesive erase ribbon since each ribbon has its own advantages.
  • the cover-up ribbon for example, can operate to obliterate characters printed with inks that are not suitable for lifting by adhesive.
  • Our invention involves the improved method of feeding an adhesive ribbon that is to be accurately lifted to an impact point. Essentially the method involves feeding the ribbon immediately before and after impact to insure by the feed motion that the ribbon is sheared free of any adhesion with adjacent structure that might otherwise interfere with the accurate lift of the ribbon.
  • the total feed for each erase cycle is slightly larger than a character width to insure a completely fresh ribbon is available. We prefer to divide this total increment into a pre-print increment of one-third. the total feed and a post-print increment of two-thirds the total feed.
  • Our method is implemented by the use of a ribbon feed cam having separate feed control surface portions that are respectively effective prior to and following impact.
  • our cam Since it is desirable to maximize the shear force before and after impact, our cam is designed to concentrate the feed motion into discreet increments and to provide a non feed operation during the time of impact. This non-feed operation at impact is also important in enabling reliable handling of a white cover-up form of erase ribbon which tends to flake or shed when impacted while feeding. Also there is noticed a tendency for the openings of characters such as a, p, and 0 to fill with white cover-up materialwhen impacted while the white ribbon is moving.
  • the ribbon lift mechanism increases the length of the ribbon span at the active or lifted position over the span length at the rest position.
  • the feed or take-up following impact is preferably designed to be at least as great as the rate at which the ribbon span length decreases due to the restoration of the lift mechanism to the rest position.
  • This design eliminates the possibility that slack might be generated to cause untracking of the ribbon.
  • the ribbon lift motion actually increases the ribbon span length by approximately two-thirds of a typical character width.
  • the ribbon feed cam thus is designed to feed one-third of a character width of ribbon prior to impact and'twothirds of the character width following impact at the rate at which the ribbon is made available by the lift moving to its rest position.
  • an adhesive ribbon to attach to the card holder or other adjacent structure 'is preferably minimized by the use of a suitable adhesive material such as polytetraflouroethylene and by the design of I contact area reducing protrusions in the surface of the card holder.
  • FIG. 1 is a fragmentary perspective view of a typewriter having an erase ribbon handling system constructed in accordance with our invention.
  • FIG. 2 is an enlarged fragmentary perspective view of numerous details of the ribbon handling system constructed in accordance with our invention.
  • FIG. 3 is a detailed vertical cross-sectional view of the erase ribbon take-up and feed mechanism taken along lines III-III of FIG. 2.
  • FIG. 4 is an enlarged broken away perspective view of a detail of construction of the ribbon lift mechanism shown in FIGS. 1 and 2.
  • FIG. 5 is a detailed top plan view of the erase ribbon supply mechanism wherein a supply ribbon support member is shown in phantom lines.
  • FIGS. 6 and 7 are perspective views respectively of ribbon supply rolls of an adhesive erase ribbon and a cover-up erase ribbon.
  • FIG. 8 is a detail perspective view of a supply spool support member employed in the erase ribbon handling system.
  • FIG. 9 is a fragmentary perspective view of ribbon lift, print, and feed cams that are configured to effect the improved ribbon feed method of our invention.
  • FIG. 10 is a side elevational view of a typewriter into which our ribbon method can be implemented.
  • FIG. 1 l is a graphic representation of the ribbon lift, feed and print sequence employed in a preferred implementation of our invention.
  • FIG. 1 there is shown a typewriter or character-bycharacter printer 10 which, for purposes of illustration is shown as being of the type described generally in U.S. Pat. No. 2,919,002.
  • the typewriter 10 includes impacting means comprising a type element 16 that opposes a paper support platen 1 1 to form a print position or impact point 12 therebetween.
  • a frame portion 13 of the typewriter 10 supports the platen 1 1 and also supports an escapement rack 14 and a rotatable print shaft 15 which together form a pair of track forming rails that extend along the length of the platen. 11.
  • the type element 16 is mounted in a print element carrier 17 which in turn is slidably mounted on the rails 14 and 15 to enable movement of the print point 12 laterally along the platen 11.
  • Normal typing is accomplished through the use of an ink ribbon 18 which for purposes of illustration can be packaged in a cartridge 19 and fed by an appropriate incrementing mechanism (not shown) all as completely disclosed in U.S. Pat. No. 3,604,549.
  • the ribbon 18 is broken away in FIG. 1 so as to not cover other mechanism of a greater consequence to the present invention.
  • an erase ribbon 20 attached at its opposite ends to a supply roll 21 and a disposable takeup spool 22 is assembled on the carrier 17 to expose an active span 23 adjacent the print point 12.
  • the span 23 is tracked past typewriter structures such as a clear plastic card-holder 11a.
  • typewriter structures such as a clear plastic card-holder 11a.
  • at least the outer surface of card holder 1 1a is made of an abhesive material such as polytetraflouroethylene and is formed with contact area reducing protrusions 11b and lead in tapered regions 11c.
  • the erase ribbon 20 is fed in character-size increments by a feed or advancing mechanism (see also FIGS. 2 and 3).
  • the ribbon 20 is threaded at the right of the print point 12 past a non-lifting, barrel shaped guide member 50 to the disposable ribbon takeup spool 22 and to the left of the print point 12 through a ribbon lift guide 60.
  • the ribbon feed mechanism 30 drives the ribbon takeup spool 22 in a counterclockwise direction by engagement of a toothed drive wheel 31 with the periphery of the ribbon 20 wound on the spool 22.
  • Drive wheel 31 is rotatably mounted on a pivoted platform 32 by shouldered screw 33.
  • Spring 34 urges platform 32 counterclockwise about its pivot stud 35 so as to resiliently urge the drive wheel 31 into contact with the ribbon 20.
  • a U-shaped drive wheel actuating arm 36 is pivotally mounted on the head of shoulder screw 33 and coaxially at another point not shown.
  • the drive wheel 31 has a plurality of spaced windows 37 extending therethrough for receiving a bent tab pawl part 38 of the drive arm 36 which is urged downwardly by the resiliency of drive arm 36.
  • a flexed washer 39 urges the drive wheel 31 upwardly against the head of the screw 33 and creates a frictional drag therebetween.
  • the configuration of pawl 38 and the frictional drag provided by washer 39 creates a one-way drive that is effective upon oscillation of the drive arm 36 to incrementally rotate drive wheel 31 clockwise and takeup spool 22 counterclockwise to wind a character-sized increment of the ribbon 20 thereon.
  • Oscillation of drive arm 36 is selectively produced by driving power taken from a ribbon feed cam 40 that is timed relative to the occurrence of print impact to being slidably keyed to the print shaft 15 which is rotated during each print cycle of the typewriter 10 (FIG. 1). Since it is desired to feed the erase ribbon 20 only during erase cycles and not with each print operation, a control mechanism 41 is provided to select operation of drive arm 36 only when an erase operation is desired.
  • the control mechanism 41 includes a frame mounted selection or mode control bail 42 supported for pivotally positioning about its axis 42a by a keyboard control mechanism, as taught in above mentioned copending U.S. Pat. Application Ser. No. 102,696 to indicate whether anormal print or erase cycle is desired.
  • Bail 42 is pivoted clockwise from its position as shown when an erase operation is desired. Pivoting of bail 42 displaces link 43 that is pivoted to the carrier 17 to move tail 44 from under cam follower arm 45. These events occur when cam 40 presents its high point to the follower 45.
  • Follower 45 as thus conditioned is free to follow restore surface portion 40a (see FIG. 9) of cam 40 downwardly and pivot about its axis 46 under the influence of a spring 47 connected to the drive arm 36 which in turn is connected to the cam follower 45 through a tie rod 48 and bellcrank 49 that is pivoted to a mounting plate 17a on the carrier 17.
  • cam 40 positively drives follower 45 upwardly toward its original position, whereupon drive arm 36 is powered clockwise about the shoulder screw 33 and pawl 38 drives wheel 31 clockwise to rotate the takeup spool 22 counterclockwise thus feeding an increment of the ribbon 20.
  • link 43 is not pivoted by bail 42 and its end 44 prevents follower 45 from moving downwardly upon rotation of the cam 40, thus no ribbon 20 is fed.
  • Takeup spool 22 can be removed when full for replacement by counterclockwise pivoting a control handle 51 about the takeup spool axis 56 (FIG. 3).
  • An over-center bow spring 53 is connected at its opposite ends to the control handle 51 through notch 54 and to a stud 55 on the carrier mounting plate 17a. Pivoting of control handle 51 brings projection 52 against the edge of platform 32 to drive platform 32 clockwise about its pivot stud 35 overcoming the force of spring 34 and moving the drive wheel 31 outwardly away from the periphery of ribbon 20 on the takeup spool 22.
  • Takeup spool 22 now can be lifted vertically off its mounting stud 56 (see FIG. 3) for replacement.
  • control handle 51 also moves the right hand guide member 50 forwardly from its position as shown to release tension in the ribbon 20 as this guide member 50 is mounted to the control handle 51 by a stud 57.
  • the control handle 51 is pivoted clockwise to return the parts to the position shown in FIGS. 2 and 3.
  • the platform 32 includes a flange part 58 that overlies a flange 22a of the spool 22 thus retaining the spool 22 on the stud 56.
  • the guide member 50 will be moved rearwardly against the ribbon to provide an initial tension in the ribbon span 23.
  • the control bail 42 also controls operation of the ribbon lift guide 60 by displacing a carrier mounted control link 61 counterclockwise about its pivot axis to move an intermediate member 62 forwardly against spring 62a to a position where a tab portion 62b thereof overlies a drive part 63 of a cam follower 64 that is pivotally mounted on the carrier 17.
  • intermediate member 62 is driven upwardly by counterclockwise pivoting of follower 64 when driven by a ribbon lift cam 65 that is timed with the print cycle by being slidably keyed to the print shaft 15.
  • the right end 62c of the intermediate member 62 engages a vertically reciprocable member 66 that is slidably mounted on a carrier portion 17b as best shown in FIG. 4.
  • the Member 66 is connected to the ribbon lift guide 60 by a pivot stud 67.
  • the lift guide 60 includes a cam slot portion 68 that slidably receives a fixed stud 17c whereby upon vertical movement of the member 66, lift guide 60 is both lifted and pivoted clockwise about its pivot stud 67. This motion brings the erase ribbon span 23 into operative alignment with the print point 12 (see FIG. 1) to cause a character erasure upon impact of the type element 16.
  • the supply roll 21 is mounted on a platform 70 that is pivoted by stud 71 about an axis 72 to the mounting plate 17a.
  • An arm 69 of the vertically reciprocable member 66 is connected by a pin 69a to a slotted arm 73 of the platform 70 whereby lifting of the guide 60 also pivots the platform 70 and the ribbon supply roll 21 carried thereby, counterclockwise to maintain a reasonably direct feed path for the ribbon 20 from the supply roll 21 to the lift guide 60.
  • the supply roll 21 includes either a core 24 (see FIG. 6) or a core (see FIG. 7) depending upon whether an adhesive erase ribbon or cover-up erase ribbon is employed.
  • Both cores 24 and 25 include internal curved spline configurations 26 that are dimensioned to engage a vertically extending complementary curved spline shaped spindle 81 of a supply roll support member 82 (see especially FIG. 8).
  • a stud 83 carried by platform 70 rotatably supports member 82 on the platform 70.
  • the mutually complementarily configured splines 26 and spindle 81 provide a drive connection that tends to force the supply roll 21 downwardly by the application of ribbon tension thereby holding the ribbon supply roll 21 firmly in place against a bottom flange part 84 of thesupport member 82.
  • the mechanism 80 applies a resilient bias force 90 to the rotatable support member 82 to tension the ribbon 20.
  • the force 90 has a tangential component in the direction opposite to the normal movement of the ribbon 20 during a feed operation as indicated by arrow 91.
  • the tensioning mechanism 80 includes a multi-toothed ratchet-wheel-like cam surface 85 on support member 82 that is engaged by a pawl end 92 of an elongated, cantilever supported, stiff wire spring 93.
  • the cam surface is made up of a plurality of inclined tooth-like contoured surface portions 86 that are successively engaged by the pawl end 92 as the ribbon 20 is fed by mechanism 30.
  • a ribbon 20 having a contact adhesive surface 27 on a core 24 is shown in FIG. 6.
  • This core 24 is characterized by having its internal splines 26 extend downwardly therefrom to provide a plurality of adjacent cylindrical segments or spline extension 28.
  • These extensions 28 are employed to control the tension applied to the ribbon span 23.
  • Wire spring 93 is wrapped at its right hand end (see FIGS. 2 and 5) about a post 94 that is carried by the platform 70.
  • an intermediate bracket 95 that includes a tab 96 against which an end 97 of the spring wire 93 bears.
  • a light tension spring 98 is anchored at one end to the tab 96 and at its opposite end to a tab 100 that is formed integrally with the platform 70.
  • the bracket 95 also includes a control arm 101 that extends to a position under the bottom flange part 84 of the spindle 81 adjacent a stop part 99 formed integrally with the platform 70 and openings 88 that selectively receive the spline extensions 28.
  • the method of our invention can be implemented in shown in FIG. 10 is initiated by depression of a keyboard key 110 to move a control interposer 111 to a position where it is trapped by a spring latch 112. Depression of interposer 111 depresses clutch control bail 113 to release a clutch latch 114 for movement by spring 115 to a position where cycle clutch 116 is permitted to rotate. Restore cam 117 rotates with cycle clutch 116 and returns clutch latch 114 to its latched position after 180 of clutch rotation. The rotation of clutch 116 drives a gear train 118 to rotate the print shaft 360.
  • Timed driving means such as print cam 120 is mounted on the print shaft 15 and acts on follower 121 to drive type element 16 about pivot axis 122 into impact with the platen 12 at the time of approximately 220 of rotation of the print shaft 15.
  • the operation of print cam 120 is graphically shown in FlG. 11. The sequencing of our invention can best be understood with reference to the time of this impact occurrence.
  • ribbon lift cam 65 and ribbon feed cam 40 are rotatably carried by print shaft 15 to rotate simultaneously with print cam 120.
  • the ribbon lift cam 65 includes a rise surface portion 65a, a dwell surface portion 65b, and a fall or restore surface portion 65c.
  • the profiles of these surface portions are shown graphically in FIG. 11. These surface portions control the rise and fall of guide 60 to position the span 23 of erase ribbon 20 either in an active position adjacent the impact point 12, or in a rest position as shown in FIG. 1 displaced below the impact point 12.
  • the ribbon feed cam 40 includes the restore surface portion 40a, an initial or pre-print feed rise portion 40b, a dwell or non-feed portion 40c, and a final or post-print feed rise portion 40a.
  • the profiles of these surface portions are graphically shown in FIG. 11.
  • both the ribbon feed cam 40 and the ribbon lift cam 65 present respective inactive surfaces 40c and 65b to their followers thereby causing the ribbon to become stationary for some period of time prior to the time of impact at approximately 220 as determined by-the print cam 120.
  • the operation of surface portions 40c and 65b in holding the ribbon 23 still at the impact time of 220 is particularly important during feeding of an erase ribbon 20 having a white cover-up transfer layer 29 (FIG. 7) since lateral motion of the .character on the erase ribbon tends to cause shedding of the transfer layer and filling of open characters such as a, p, and o.
  • the non-feeding action of the cam surface 400 is also important when feeding an adhesive erase ribbon since the feed is thereby concentrated into shorter, more abrupt increments to maximize the available force for shearing the ribbon loose from adjacent structure such as the cardholder 11a to which it may have becomeattached.
  • ribbon lift cam 65 presents fall surface 650 to the follower 64 and the ribbon span 23 begins tomove downwardly to its rest position.
  • the ribbon feed cam 40 presents post-print feed surface 40d to its follower 45 to thereby drive arm 36 through a further feed increment to complete the ribbon feeding operation.
  • the geometry of the ribbon span 23 (FIG. 2) as determined by guides 50 and 60 is such that the span 23 is two-thirds of a character width longer when guide 60 is lifted to its active position than when it is in its rest position.
  • both the lift mechanism and the winding mechanism tend to unspool ribbon 20 from the supply spool 24 or 25.
  • the additive unspooling effect is shown by curve in FIG. 11. Following print impact at 220 of the cycle, guide 60 is restored to its rest position and the length of the ribbon span path is shortened by the two-thirds of a character width it was initially lengthened.
  • the post-feed surface portion 40d of ribbon feedcam 40 is empirically profiled to wind ribbon 20 on takeup spool 22 at at least substantially the same rate as the ribbon span path is shortened.
  • Curve 130 shows the cumulative effect of the lift and feed actions on ribbon unspooled from supply spool 24 or 25. Note that very little unspooling occurs following print impact. This result is achieved by configuring the ribbon feed cam surface 40d to just wind that ribbon made available to it by the fall motion of the lift guide 60 during effective operation of ribbon lift fall surface portion 65c.
  • a character-by-character printer having impacting means defining a print point and first timed driving means for establishing the time of impact occurrence, an erase ribbon handling mechanism separate from an inking ribbon mechanism and capable of lifting and feeding an adhesive erase ribbon, said erase ribbon handling mechanism including means supporting a spool of erase ribbon, guide means for receiving a span of said erase ribbon and including at least one lift member that is movably mounted for interposing said span at said print point of said impacting means, said printer having structure adjacent said span, and advancing means drivingly connected with said erase ribbon for advancing said erase ribbon along its length past said print point, the improvement comprising:
  • second timed driving means comprising cam means having a pre-print feed rise portion for positively driving said advancing means to advance a first increment of said erase ribbon past said print point prior to said impact time, said second timed driving means further controlling said advancing means to prevent advancement of said erase ribbon thereby during said impact, and said cam means having a post-print feed rise portion for positively driving said advancing means to advance a further increment of said erase ribbon subsequent to said impact time so that said cam rise portions provide a positive force to shear the ribbon from any structure to which it may become attached both before and after impact.
  • third timed driving means operatively connected with said lift member for causing said lift member to displace said span from a rest position wherein said span is displaced from said print point to an active position wherein said span is superimposed upon said print point prior to said impact time and simultaneously with at least a portion of the time said advancing means is advancing said first increment of said erase ribbon, and further for moving said lift member to restore said span from said active position to said rest position subsequent to said impact time and simultaneously with at least a portion of the time said advancing means is advancing said further increment of said erase ribbon.
  • said post-print feed rise portion of said cam means having a rise sufficient to operate said advancing means to advance said further increment of said erase ribbon at a rate that is at least substantially as great as the rate of decrease in said span length occurring during restoration of said lift member to its said rest position.
  • said erase ribbon comprises a contact adhesive surface.
  • a printer as defined in claim 4 wherein said structure located adjacent said span of erase ribbon has an external surface comprised of polytetraflouroethylene.
  • a printer as defined in claim 5 wherein said structure located adjacent said span comprises an external surface including protrusions for reducing the potential contact area between said erase ribbon and said struc-

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US00266764A 1972-06-27 1972-06-27 Erase ribbon feed Expired - Lifetime US3788442A (en)

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JP (1) JPS5321333B2 (US20110232667A1-20110929-C00004.png)
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US3927748A (en) * 1974-05-16 1975-12-23 William H Wolowitz Attachment for converting a standard typewriter to a self-correcting typewriter
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US4108557A (en) * 1976-02-14 1978-08-22 Triumph Werke Nurnberg A.G. Error correcting typewriter
US4120594A (en) * 1977-02-04 1978-10-17 Centronics Data Computer Corp. Correction device for typewriters and the like
US4131374A (en) * 1977-08-18 1978-12-26 Scm Corporation Dual segment continuous motion ribbon feed mechanism
US4172672A (en) * 1976-04-27 1979-10-30 Ing. C. Olivetti & C., S.P.A. Device for facilitating location of the printing point and/or correction of characters
US4273454A (en) * 1979-06-15 1981-06-16 Exxon Research & Engineering Co. Tape tensioning mechanism
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FR2533902A1 (fr) * 1982-09-13 1984-04-06 Watanabe Hiroaki Bobine de ruban correcteur pour machine a ecrire
EP0795417A1 (en) * 1996-03-12 1997-09-17 Brother Kogyo Kabushiki Kaisha Ribbon cassette with guide member

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IT1160425B (it) * 1978-07-18 1987-03-11 Olivetti & Co Spa Dispositivo di scrittura e/o correzione per macchine scriventi
DE2934832A1 (de) * 1978-09-05 1980-03-13 Gen Electric Waermeuebertragungssystem fuer zinkoxid-varistoren
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DE2931326C2 (de) * 1979-08-02 1984-02-02 Olympia Werke Ag, 2940 Wilhelmshaven Antriebsvorrichtung für das Farb- und Korrekturband in einer Schreib- oder ähnlichen Büromaschine
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DE3048810C2 (de) * 1980-12-23 1983-05-05 Triumph-Adler Aktiengesellschaft für Büro- und Informationstechnik, 8500 Nürnberg Hub- und Transportvorrichtung für ein Korrekturband in Schreib- und ähnlichen Maschinen
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DE3422500A1 (de) * 1984-06-16 1985-12-19 Olympia Werke Ag, 2940 Wilhelmshaven Verfahren zur steuerung des korrekturvorganges fuer elektronisch gesteuerte schreibmaschinen
DE3510857A1 (de) * 1985-03-26 1986-10-02 Olympia AG, 2940 Wilhelmshaven Hubvorrichtung fuer ein korrekturband in schreib- oder aehnlichen bueromaschinen
DE3532369A1 (de) * 1985-09-11 1987-03-19 Olympia Ag Transportvorrichtung fuer ein farbband in kraftangetriebenen schreib- oder bueromaschinen aehnlicher bauart
DE3540925A1 (de) * 1985-11-19 1987-05-21 Olympia Ag Korrekturvorrichtung fuer schreib- oder bueromaschinen aehnlicher bauart

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US1415293A (en) * 1918-08-14 1922-05-09 Baldwin Eraser Company Erasing attachment for typewriters
US2425967A (en) * 1945-05-26 1947-08-19 Underwood Corp Ribbon feed for typewriting machines
US2609077A (en) * 1949-10-22 1952-09-02 Underwood Corp Ribbon feed for typewriting machines
US2734614A (en) * 1956-02-14 Proportional ribbon feed mechanism
US3154185A (en) * 1960-06-18 1964-10-27 Olympia Werke Ag Typewriter ribbon control arrangement
US3204746A (en) * 1963-08-23 1965-09-07 Wolowitz William Howard Typewriter with error-correction features
US3346090A (en) * 1963-05-31 1967-10-10 Ibm Ribbon feed mechanism
US3397767A (en) * 1965-09-07 1968-08-20 Robert B. Hobbs Erasure tape mechanism for typewriters
US3444979A (en) * 1965-06-09 1969-05-20 Olivetti & Co Spa Ribbon feeding device for a variable spacing typewriter
US3643779A (en) * 1970-12-14 1972-02-22 Scm Corp Ribbon mechanism for cartridge supported ribbons

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US1415293A (en) * 1918-08-14 1922-05-09 Baldwin Eraser Company Erasing attachment for typewriters
US2425967A (en) * 1945-05-26 1947-08-19 Underwood Corp Ribbon feed for typewriting machines
US2609077A (en) * 1949-10-22 1952-09-02 Underwood Corp Ribbon feed for typewriting machines
US3154185A (en) * 1960-06-18 1964-10-27 Olympia Werke Ag Typewriter ribbon control arrangement
US3346090A (en) * 1963-05-31 1967-10-10 Ibm Ribbon feed mechanism
US3204746A (en) * 1963-08-23 1965-09-07 Wolowitz William Howard Typewriter with error-correction features
US3444979A (en) * 1965-06-09 1969-05-20 Olivetti & Co Spa Ribbon feeding device for a variable spacing typewriter
US3397767A (en) * 1965-09-07 1968-08-20 Robert B. Hobbs Erasure tape mechanism for typewriters
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Publication number Priority date Publication date Assignee Title
US4007823A (en) * 1973-07-05 1977-02-15 Victor Barouh Typewriter correction materials employing adhesives
US3905465A (en) * 1974-02-22 1975-09-16 Litton Business Systems Inc Error correcting typewriter
US3927748A (en) * 1974-05-16 1975-12-23 William H Wolowitz Attachment for converting a standard typewriter to a self-correcting typewriter
US3987883A (en) * 1975-04-17 1976-10-26 International Business Machines Corporation Ribbon lifting mechanism for a wire matrix printer
US4108557A (en) * 1976-02-14 1978-08-22 Triumph Werke Nurnberg A.G. Error correcting typewriter
US4172672A (en) * 1976-04-27 1979-10-30 Ing. C. Olivetti & C., S.P.A. Device for facilitating location of the printing point and/or correction of characters
US4120594A (en) * 1977-02-04 1978-10-17 Centronics Data Computer Corp. Correction device for typewriters and the like
US4302118A (en) * 1977-05-27 1981-11-24 International Business Machines Corporation Typewriter cartridge and feed mechanism therefor
US4131374A (en) * 1977-08-18 1978-12-26 Scm Corporation Dual segment continuous motion ribbon feed mechanism
US4273454A (en) * 1979-06-15 1981-06-16 Exxon Research & Engineering Co. Tape tensioning mechanism
FR2533902A1 (fr) * 1982-09-13 1984-04-06 Watanabe Hiroaki Bobine de ruban correcteur pour machine a ecrire
EP0795417A1 (en) * 1996-03-12 1997-09-17 Brother Kogyo Kabushiki Kaisha Ribbon cassette with guide member
US5709487A (en) * 1996-03-12 1998-01-20 Brother Kogyo Kabushiki Kaisha Ribbon cassette with guide member

Also Published As

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FR2203714B1 (US20110232667A1-20110929-C00004.png) 1976-06-11
DE2331080A1 (de) 1974-01-10
JPS5321333B2 (US20110232667A1-20110929-C00004.png) 1978-07-01
DE2331080B2 (de) 1978-08-10
NL171339C (nl) 1983-03-16
ATA551073A (de) 1978-09-15
DE2331080C3 (de) 1979-04-26
AU469055B2 (en) 1976-01-29
ZA733800B (en) 1975-01-29
AU5643273A (en) 1974-12-05
AT349500B (de) 1979-04-10
BR7304746D0 (pt) 1974-09-05
BE801522A (fr) 1973-10-15
NL171339B (nl) 1982-10-18
FR2203714A1 (US20110232667A1-20110929-C00004.png) 1974-05-17
JPS4943712A (US20110232667A1-20110929-C00004.png) 1974-04-24
SE379684B (US20110232667A1-20110929-C00004.png) 1975-10-20
IT981511B (it) 1974-10-10
NL7307374A (US20110232667A1-20110929-C00004.png) 1974-01-02
GB1390721A (en) 1975-04-16
CH551875A (de) 1974-07-31
CA981203A (en) 1976-01-06

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