US2217180A - Typewriting machine - Google Patents

Typewriting machine Download PDF

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Publication number
US2217180A
US2217180A US166460A US16646037A US2217180A US 2217180 A US2217180 A US 2217180A US 166460 A US166460 A US 166460A US 16646037 A US16646037 A US 16646037A US 2217180 A US2217180 A US 2217180A
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United States
Prior art keywords
carriage
ribbon
platen
auxiliary
typewriter
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Expired - Lifetime
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US166460A
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English (en)
Inventor
John J Noonan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
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International Business Machines Corp
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Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US166460A priority Critical patent/US2217180A/en
Priority to FR842210D priority patent/FR842210A/fr
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Publication of US2217180A publication Critical patent/US2217180A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41J35/30—Manifolding or like arrangements
    • B41J35/34—Manifolding or like arrangements using a plurality of separate ink ribbons, e.g. including one hectographic ink ribbon

Definitions

  • This invention relates to typewriting machines, and more particularly to a means for supporting and advancing a strip of copying material, such' as a hectograph carbon paper ribbon, during the printing operations of the typewriter.
  • Hectograph carbon paper is a material impregnated with hectograph ink which may be employed in a typewriter to transfer printing to a sheet of paper. Numerous duplicate copies may thereafter be directly printed from the sheet of paper containing the hectograph printing.
  • a typewriter in which a hectograph carbon paper ribbon unwinds from a supply roll and advances in letter spacing steps with a platen carriage during the printing operations of the typewriter. As the printing proceeds, unused portions of the carbon paper ribbon move with the carriage into the path of the type members which perform the printing operations.
  • a simple release device may be actuated by the usual carriage shifting, or release members, to permit free movement of the carriage independently of the hectograph ribbon.
  • An object of this invention is to produce a simple attaching device whereby the carbon paper ribbon is secured to the platen carriage, so as to automatically advance therewith during the printing operations of the typewriter.
  • Another object is to provide an eiiective releasing means whereby the attaching device which secures the ribbon to the carriage is released to permit movement of the platen carriage independently of the carbon paper ribbon.
  • Another object of this invention is to provide a simple tensioning device for holding and preventing retrograde movement of the used portion of the ribbon.
  • Another object is to provide a guide for holding the carbon paper ribbon between the. platen of the typewriter and a work sheet, so that the work sheet may receive printing from the carbon paper in addition to the usual printing of the' typewriter.
  • a further object of this invention is to produce a guide for the hectograph carbon paper ribbon which will normally space the ribbon from the work sheet but permit the work sheet to be forced into contact with the ribbon by the type members of the typewriter.
  • Fig. 1 is a top view of a. typewriter, embodying a the features of this invention
  • Fig, 2 is a front elevation of the typewriter shown in Fig. 1.
  • Fig. 3 is an enlarged section taken approximately on the line 8-3 in Fig. 2, showing a strip '9 of carbon paper and a guide confining the same.
  • Fig. 4 is a fragmentaryfront view of the parts shown in Fig. 3.
  • Fig. 5 is an enlarged section taken approximately on the line 55 oi Fig. 1, and includes a work sheet and a type member.
  • Fig. 6 is an enlarged section taken approximately on the line 6-6 in Fig. 1, showing an attaching' member securing the strip of carbon paper to the guide, a portion of the platen being broken away. 1
  • Fig. '1 is a section similar to Fig. 6, showing the attaching member released from the carbon paper.
  • Fig. 8 is an enlarged end view partly in section, taken approximately along the line 8-8 of Fig. 1.
  • Fig. 9 is an enlarged section taken on the line 9-9 of Fig. 1, showing a portion of the carriage release mechanism.
  • Fig. 10 is a section taken on line l0lli in Fig. 9.
  • Fig. 11 is an enlarged section showing a portion of the attaching member securing the carbon paper ribbon to the guide. 4
  • Fig. 12 is an enlarged rear view of a rack and an escapement device for the platen carriage.
  • Fig. 13 is a view partly in section along the line
  • Fig. 14 is a bottom view looking upwardly from the line
  • Fig. 15 is an enlarged section taken on the line 5
  • Fig. 16 is an enlarged section taken on the line
  • Fig. 17 is a section taken approximately on' the line
  • Fig. 18 is a section taken on the line '
  • Fig. 19 is an enlarged section taken approximately on the line I 9
  • Fig. 20 is an enlarged fragmentary front view partly in section on the line 20-26 in Fig. 19, showing the presser member yieldingly holding the ribbon in engagement with the tensioning roll.
  • typewriting machine of ordinary construction which may include a frame or housing 2
  • a typewriter ribbon 25 may extend from spools 26 through a ribbon guide 21, as shown in Fig. 1.
  • the typewriter is provided with a reciprocable platen carriage 28 for a rotatable platen 29.
  • the platen carriage may be moved in a letter spacing direction by any suitable source of power usual in typewriting machines, and its movement in such direction may be controlled by any suitable means, such as an escapement mechanism whereby the carriage is caused to move in letter spacing steps.
  • a rack 30 provided at opposite ends with arms 3
  • the rack as shown in Fig. 12, is provided with teeth 34 adapted to mesh with a pinion 35, which is controlled by an escapement wheel 36.
  • the movement of the escapement wheel 36 is controlled by the escapement dogs 31 which ma; be actuated in response to movement of the type keys in a manner well understood in this art.
  • the rack 36 is normally held in engagement with the pinion by the tension springs 38 which are secured to the pivoted arms 3
  • the rack 36 may be disengaged from the pinion 35 by a shifting member or carriage release lever 39 which is pivoted to the carriage at 46.
  • the carriage release lever 39 is connected by a link 4
  • the rack 30 may also be disengaged from the pinion 35 to release the carriage from the escapement by a tabular key 42 shown in Figures 1, 2 and 13.
  • the rack 30 may be raised out of engagement with the pinion 35 by the tabulator key 42 in any suitable manner.
  • a bell crank lever 43 including arms and 48 pivoted at 44 to a portion of the typewriter frame 2
  • the arm 45 of the bell crank lever is provided with an abutment 46 adapted to strike a lateral extension 41 on the rack 30 to raise the rack out of engagement with the pinion 35 of the escapement mechanism.
  • the arm 48 of the bell crank lever is pivotally connected by a link 49 to a key lever 50 which supports the tabulator key 42.
  • the key lever 50 may be supported by a pivot member 5
  • the platen carriage may be conveniently shifted to the right from the position shown in Fig. l, by pressure applied to a restoring member in the form of a line space lever 52.
  • This lever 52 is provided with a pivot member 53 extending through a support 55 on the carriage, as shown in Fig. I and Fig. 14.
  • the line space lever 52 is normally held in the position shown in Figures 1, 6 and 14 by a tension spring 56 which is secured to the support 55 and also to an arm 51 on the pivot member 53.
  • the platen 29 may be rotated by the usual line-space mechanism, (Figs. 6 and 7) comprising a line-space wheel 58 fixed to the platen axle 59 and adapted to be rotated by a pawl 6
  • the usual line-space mechanism (Figs. 6 and 7) comprising a line-space wheel 58 fixed to the platen axle 59 and adapted to be rotated by a pawl 6
  • a support 64 extending from the frame 2
  • the spool 65 is secured on a shaft 66 between a collar 61 and a removable nut 68, as shown in Fig. 15.
  • the lower portion of the shaft 66 is rotatably mounted in a bearing 69 on the support 64.
  • a spring 1'0 is secured to the support 64, said spring having an upper portion H frictionally engaging the collar 61 on the shaft 66.
  • the ribbon 63 extends from the spool 65 around an alining roll 12 carried by an arm 13 and then through a'guide 14 which holds the ribbon between the platen 29 and a work sheet 15 shown in Fig. 5.
  • the ribbon guide 14 extends beyond the ends of the platen 28 and is secured to the platen carriage by any suitable attaching means which may include screws 18.
  • the guide 14 has channel shaped portions H to confine the ribbon 53 and normally space the ribbon from the work sheet I5.
  • the channel shaped portions I1 are separated from each other to permit the work sheet to be forced into contact with the ribbon 83 by the type members 24.
  • the work sheet 15 may receive printing from the usual typewriter ribbon and also from the hectograph carbon paper ribbon 83 to provide for the printing of duplicate copies directly from the work sheet 1 5.
  • the ribbon 83 move step by step with the carriage so that an unused portion of the carbon paper will be employed during each printing step.
  • an attaching member 18 (Figs. 1, 2, Sand 8) for securing a portion of the ribbon to the guide 14 so as to unwind the ribbon ufrom the spool 85 and advance said ribbon in response to the step by step movements of the platen carriage 28.
  • the attaching member 18 is pivotally secured I at 18 to a support 88 on the carriage and has a lower portion 8
  • An extension 8Ia on the attaching member 18 is engaged by the line-space pawl 88 (Fig. 6) to hold the lower portion 8I of the attaching member in engagement with the ribbon.
  • the pawl 88 is normally held in the position shown in Figs. 6 and 8 by the tension spring 58 (Fig. 14) which is operatively connected to the pawl 88 through the line-space lever 52, link 82, and arm 8Iwh ich carries the pawl 88.
  • a tensioning device for holding and preventing retrograde movement of the used portion of the ribbon.
  • the tensioning device which is carried by a support 82 secured to the typewriter frame 2
  • the presser roll 84 is rotatably mounted on .a shaft 85 carried by a slide member 88 movable in a slot 81 of the support 82.
  • a tension spring 88 secured to the support 82 and slide member 86 tends to force the presser roll 84 toward the driven roll 83 to yieldingly hold the ribbon in contact with said driven roll.
  • the driven roll 83 for tensioning the ribbon 83 is secured to a shaft 88 which is rotatably mounted in the support 82.
  • a means for driving the shaft 88 I have shown in Figs. 16 and 17 an arm 8I- fixed to said shaft, andprovided with a pivoted pawl 82 adapted to be driven by a ratchet 83 on a spool 84 which is loosely mounted on the shaft 88.
  • a coiled spring 85 secured to the spool 84 and support 82 as shown in Fig. 16, provides the power for rotating the ratchet 83 in the direction indicated by the arrow in Fig. 17.
  • the spring 85 therefore,- will transmit energy through the ratchet 93 and pawl 82 on the arm 8
  • I have shown a flexible mam-5' ber 88 through which motion is transmitted to energize the spring 85 by the return movement of the platen carriage 28.
  • the flexible member 88 is secured to the platen carriagejby means of a screw 81 and extends around the spool 84. During said return movement of the carriage 28 the spool 84 is rotated by said flexible member to wind the spring 85.
  • the pawl82 which is yieldingly held in contact with the ratchet 83 by a spring 88 (Fig. 17) merely slides over the teeth of the ratchet 83.
  • on shaft 88 is provided with a pawl 88 yieldingly held in engagement with ratchet teeth I88 on the support 82, by a spring I8I, as shown in Figs. 16 and 18.
  • the attaching member I8 will secure the ribbon to the carriage, and the tensioning device including the driven roll 83 will hold the used portion of the ribbon under tension and prevent retrograde movement thereof.
  • said carriage may be manually moved to any desired position by the carriage release member 38, the
  • the attaching member I8 is released from the ribbon, as shown in Fig. 7, to permit movement of the carriage independently of said ribbon.
  • the platen carriage 28 may be shifted in either direction by imparting a downward movement to the carriage release lever 38, thereby causing the rack 38 to be disengaged from the pinion of the escapement mechanism.
  • said lever is provided with a lateral extension I83 having a cam I84.
  • the cam I84 cooperates with an abutment I 85 on the linespace pawl 88 to move the pawl from the position shown in Fig. 6 to the position shown in Fig. '7, thereby releasing the attaching member 18 from the ribbon 83.
  • the platen carriage 28 is then free to be moved by said release lever in either direction independently of the ribbon 83.
  • the tabulator key 42 may be depressed to lift the rack 30 out of engagement with the pinion 35 of the escapement mechanism to permit shifting of the platen carriage 28.
  • the rack 30 is raised by the tabulator key 42, motion is transmitted through the link 4
  • the carbon paper ribbon 63 unwinds from the supply roll 65 and advances in letter spacing steps with the platen carriage during the printing operations of the typewriter. However, whenever the platen carriage is shifted by the line-space lever 52, carriage release lever 39, or tabulator key 42, the ribbon 63. is released to permit movement of the carriage independently of said ribbon.
  • the spring 10 engaging the underside of the collar 61, prevents the feed rollers from drawing the tape to the left (Figs. 1 and 2) under the stimulus of spring 95 (Fig. 16). Since the feed rollers 83, 84 merely have to take up the slack in the tape 63, the spring 95 needs only to be strong enough to rotate the feed rollers 83, 84 against the friction of their pivots. Thus spring 10 has to have only a small braking efiect on the spool 65 to prevent over-feeding of the ribbon 63.
  • the simple attaching member 18 may be actuated by the usual elements of the typewriter, thereby eliminating complex and expensive automatic devices for controlling the action of said attaching member.
  • a platen mounted in the carriage, an auxiliary ribbon guide mounted in the carriage and arranged longitudinally of the platen along the writing line thereon, letter spacing mechanism for the carriage, means mounted in said carriage for causing an auxiliary ribbon passing through said guide from a source external to the carriage to advance with the carriage during the letter spacing movement thereof, means on the carriage for releasing the letter spacing means from the carriage to permit the carriage to be moved by hand independently of the letter spacing means, and means whereby the carriage release lever renders the means for causing the ribbon to travel with the carriage ineffective.
  • ribbon feeding mechanism including a pair of feed rollers mounted independently of the carriage and a flexible operating connection between the carriage and the feed rollers for operatively connecting the feed rollers to the carriage, a ribbon supply spool mounted independently of the carriage, a ribbon guide extending longitudinally of the platen along the writing line thereof for receiving the ribbon from the supply spool and guiding said ribbon to said feed rollers, letter spacing mechanism for the carriage, manually controlled means for releasing the letter spacing means to permit the carriage to move freely, means on the carriage to compel the ribbon to travel therewith thereby tending to create a slack in the stretch of ribbon from the carriage to said feed rollers which take up the slack as the carriage moves in a letter spacing direction, and means interconnecting the manual means and the compelling means for freeing the carriage from the ribbon to permit the carriage to be moved in either direction without moving the ribbon.
  • a typewriter having a platen carriage pro vided with a platen, a guide secured to said platen carriage, an auxiliary ribbon in said guide, said ribbon being arranged longitudinally of said platen, an attaching device securing said auxiliary ribbon to said platen carriage so as to advance the ribbon with the carriage during the printing operations of the typewriter, and a releasing member whereby said attaching device is released to permit movement of the platen carriage independently of said auxiliary ribbon, the platen carriage being provided with a restoring device to return said platen carriage, and said releasing member being actuated by said restoring device, so as to release said auxiliary ribbon in response to the operation of said restoring devicel 4.
  • -A typewriter having a platen carriage provided with a platen, a guide secured to said platen.
  • a typewriter having a platen carriage provided with a platen, a guide secured to said platen carriage, an auxiliary ribbon in said guide, said ribbon being arranged longitudinally of said platen, an attaching device securing the auxiliary ribbon to said platen carriage so as to advance theribbon with the carriage during the printing operations of the typewriter, a releasing member whereby said attaching device is released to permit movement of the platen carriage independently of the ribbon, an escapement permitting step by step movements of said platen carriage and ribbon, and a tabulating key whereby the carriage is released from said escapement to provide for relatively long movements of said carriage, said releasing member being actuated by the tabulating key to release the auxiliary ribbon in response to the operation of said tabulating key.
  • a typewriter having a platen carriage movable step by step, a platen carried by said carriage, a spool of auxiliary ribbon rotatably supported independently of said carriage, a guide for said ribbon secured to said carriage, said guide being at the front of the platen, the auxiliary ribbon being extended from said spool and through said guide, a tensioning device receiving theextending portion of said ribbon at a point beyond said guide, said tensioning device being supported independently of said carriage, an attaching member securing a portion of said auxiliary ribbon to said carriage, so as to unwind and advance said ribbon in response to the step by step movements of said carriage, a releasing member to release said attaching member from the auxiliary ribbon and thereby permit movement of the carriage independently of said ribbon, a restoring device to return said carriage, and means for transmitting movement from said restoring device to said releasing member to permit return of the carriage independently of said auxiliary ribbon.
  • a typewriter having a platen carriage movable step by step, a platen carried by said carriage, a spool of auxiliary ribbon rotatably supported independently of said carriage, a guide for'said ribbon secured to said carriage, said guide being at the front of the platen, the auxiliary ribbon being extended from said spool and through said guide, a tensioning device receiving the extended portion of said ribbon at a point beyond said guide, said tensioning device being supported independently of said carriage, an attaching member securing a portion of said auxiliary ribbon to said carriage, so as to unwind and advance said ribbon in response to the step by step movements of said carriage, a releasing member to release said attaching member from the auxiliary ribron and thereby permit movement of the carriage independently of said ribbon, an escapement permitting step by step movements of said platen carriage and auxiliary ribbon, and a carriage shifting device whereby the carriage is released from said escapement to permit free movement of the carriage in either direction, said releasing member being actuated by said carriage shifting device to release said auxiliary ribbon in response to
  • a typewriter having a platen carriage movable step by step, a platen carried by said carriage, a spool of auxiliary ribbon rotatably supported independently of said carriage, a guide for said ribbon secured to said carriage, said guide being atthe front of the platen, the auxiliary ribbon being extended from said spool and through said guide, a tensioning device receiving the extended portion of said ribbon at a point beyond said guide, said tensioning device being supported independently of said carriage, an attaching member securing a portion of said auxiliary ribbon to said carriage, so as to unwind and advance said ribbon in response to the stepby step movements of said carriage, a releasing member to release said attaching member from the auxiliary ribbon and thereby permit movement of the carriageindependently of said ribbon, an escapement permitting step by step movements of saidplaten carriage and ribbon, and a tabulating key whereby the carriage is released from said escapement to provide for relatively long movements of said carriage, said releasing member being actuated by the tabulating key to release the auxiliary ribbon in response to the operation of said
  • a typewriter having a reciprocable carriage for a platen, the carriage being movable step by step in a letter spacing direction, a manually operated member for returning the carriage, a spoolof auxiliary ribbon rotatably supported independently of said carriage, a guide for said ribbon secured to said carriage, the auxiliary ribbon being extended from said spool through said guide, an attaching member secur ing a portionvof said auxiliary ribbon to said carriage, so as to unwind and advance said ribbon in response to the step by step movements of said carriage, and a tensioning device supported'independently of said carriage for holding the used portion of the ribbon, said tension 11.
  • a typewriter having a reciprocable carriage for a platen, the carriage being movable step by step in a letter spacing direction, a manually operated member for returning the carriage, a spool of auxiliary ribbon rotatably supported independently of said carriage, a guide for said ribbon secured to said carriage, the auxiliary ribbon being extended from said spool through said guide, an attaching member securing a portion of said auxiliary ribbon to said carriage, so as to unwind and advance said'ribbon in response to the step by step movements of said carriage, and a tensioning device supported independently of said carriage for holding the used portion of the ribbon, said tensioning device comprising a rotary roll, a spring tending to rotate the roll in one direction so as to retain the extended used portion of the ribbon under tension, a ratchet device to prevent retrograde movement of the roll, and means to energize said spring.
  • a typewriter having a reciprocable carriage for a platen, the carriage being movable step by bon being extended from said spool through said' guide, an attaching member securing a portion of said auxiliary ribbon to said carriage, so as to unwind and advance said ribbon in response to the step by step movements of said carriage, a tensioning device supported independently of said carriage for holding the used portion of the ribbon, said tensioning device comprising a rotary roll, a spring tending to rotate the roll in one direction so as to retain the extended used portion of the ribbon. under tension, a device to prevent retrograde movement of the roll, and means operated during the return movement of the carriage to energize said spring.
  • a typewriter having a reciprocable carriage for a platen, the carriage being movable step by step in a letter spacing direction, a manuallyoperated member for returning the .carriage, a spool of auxiliary ribbon rotatably supported independently of said carriage, a guide for said ribbon secured to said carriage, a guide roll for alining the ribbon with said guide, the auxiliary ribbon being extended from said spool around said guide roll and through said guide, an attaching member securing a portion of said auxiliary ribbon to said carriage, so as to unwind and advance said ribbon in response to the step by step movements of said carriage, a releasing member to release said attaching member from the ribbon and thereby permit movement of the carriageindependen'tly of said ribbon, said releasing member being actuated by said manually operated member for returning the carriage, and a tensioning device supported independently of said carriage for holding the used portionof the ribbon, said tensioning device comprising a rotary roll, a presser member yielding1y holding the used portion of the ribbon in contact with the roll,
  • an auxiliary ribbon mechanism including an auxiliary ribbon supply spool mounted independently of the carriage, ribbon guiding means mounted on the carriage to support astretch of the auxiliary ribbon along the writing line, said stretch of ribbon being transported by the carriage, means to cause the ribbon to travel in step with the carriage in its letter spacing movements and operative to maintain the auxiliary ribbon stationary with respect to the carriage, means to take up the slackin the auxiliary ribbon, tabulating mechanism including a tabulating key, and means controlled by the tabulating key for rendering ineffective the means for causing the ribbon to feed in step with the carriage during tabulating operation.
  • an auxiliary 'ribbon mechanism including an auxiliary ribbon supply spool mounted independently of the carriage; ribbon guiding means mounted on the carriage to support a stretch of the auxiliary ribbon along the writing line, said stretch of ribbon being transported by the carriage; means to compel the ribbon to travel with the carriage in its letter spacing movements and operative to maintain the auxiliary ribbon stationary-with respect to the carriage, means to take up the slack in the auxiliary ribbon, carriage feeding mechanism, carriage release mechanism for freeing the carriage from the carriage feeding mechanism including a carriage release lever mounted on the carriage, and means controlled by said release lever for rendering the compelling means ineffective whenthe carriage is released from the feed mechanism.
  • an auxiliary ribbon mechanism including an auxiliary ribbon supply spool mounted independently of the carriage; ribbon guiding means mounted on the carriage to support a stretch of the auxiliary ribbon along the writing line, said stretch of ribbon being transported by the carriage; means to compel the ribbon to travel with the carriage in its letter spacing movements and operative to maintain the auxiliary ribbon stationary with respect to the carriage, means to take up the slack in the auxiliary ribbon, carriage feed mechanism, means to release the carriage from the feed mechanism, and means controlled by the releasing means for rendering the compelling means ineffective whereby to enable the ribbon to remain immovable when thecarriage is released from the feed mechanism.

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US166460A 1937-07-24 1937-09-30 Typewriting machine Expired - Lifetime US2217180A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US166460A US2217180A (en) 1937-07-24 1937-09-30 Typewriting machine
FR842210D FR842210A (fr) 1937-07-24 1938-08-17 Machine à écrire

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US206743XA 1937-07-24 1937-07-24
US300937XA 1937-09-30 1937-09-30
US166460A US2217180A (en) 1937-07-24 1937-09-30 Typewriting machine

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US166460A Expired - Lifetime US2217180A (en) 1937-07-24 1937-09-30 Typewriting machine

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FR (1) FR842210A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467881A (en) * 1945-06-07 1949-04-19 Imp Typewriter Co Ltd Ribbon guiding means for typewriters
US2479669A (en) * 1945-06-07 1949-08-23 Imp Typewriter Co Ltd Ribbon feeding mechanism for typewriters
US2634849A (en) * 1949-11-08 1953-04-14 Henry Beulah Louise Multicopy attachment for typewriting machines
US2687200A (en) * 1950-02-25 1954-08-24 Ford Ronald Max Hectographic ribbon-feeding apparatus for typewriting machines
US2695091A (en) * 1951-02-14 1954-11-23 Frank R Ford Ltd Ribbon guide means for typewriting machines
US2695698A (en) * 1952-02-11 1954-11-30 Henry Beulah Louise Typewriter attachment for producing a plurality of ribbon copies
DE1200843B (de) * 1958-04-26 1965-09-16 Grundig Max Transportvorrichtung an einer Schreibmaschine fuer ein hektographisches Farbband
US3283876A (en) * 1962-05-14 1966-11-08 Siemens Ag Endless ink ribbon arrangement for typewriters
US3367470A (en) * 1965-01-04 1968-02-06 Carroll H. Berill Typewriter with multiple ribbons
US3726381A (en) * 1971-03-03 1973-04-10 Mohawk Data Sciences Corp Printer ribbon feed
JPS4877835A (fr) * 1971-12-06 1973-10-19

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467881A (en) * 1945-06-07 1949-04-19 Imp Typewriter Co Ltd Ribbon guiding means for typewriters
US2479669A (en) * 1945-06-07 1949-08-23 Imp Typewriter Co Ltd Ribbon feeding mechanism for typewriters
US2634849A (en) * 1949-11-08 1953-04-14 Henry Beulah Louise Multicopy attachment for typewriting machines
US2687200A (en) * 1950-02-25 1954-08-24 Ford Ronald Max Hectographic ribbon-feeding apparatus for typewriting machines
US2695091A (en) * 1951-02-14 1954-11-23 Frank R Ford Ltd Ribbon guide means for typewriting machines
US2695698A (en) * 1952-02-11 1954-11-30 Henry Beulah Louise Typewriter attachment for producing a plurality of ribbon copies
DE1200843B (de) * 1958-04-26 1965-09-16 Grundig Max Transportvorrichtung an einer Schreibmaschine fuer ein hektographisches Farbband
US3283876A (en) * 1962-05-14 1966-11-08 Siemens Ag Endless ink ribbon arrangement for typewriters
US3367470A (en) * 1965-01-04 1968-02-06 Carroll H. Berill Typewriter with multiple ribbons
US3726381A (en) * 1971-03-03 1973-04-10 Mohawk Data Sciences Corp Printer ribbon feed
JPS4877835A (fr) * 1971-12-06 1973-10-19

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Publication number Publication date
FR842210A (fr) 1939-06-08

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