US2281688A - Ribbon attachment for typewriters for making duplicate copies - Google Patents

Ribbon attachment for typewriters for making duplicate copies Download PDF

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Publication number
US2281688A
US2281688A US289078A US28907839A US2281688A US 2281688 A US2281688 A US 2281688A US 289078 A US289078 A US 289078A US 28907839 A US28907839 A US 28907839A US 2281688 A US2281688 A US 2281688A
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US
United States
Prior art keywords
ribbon
platen
spring
tube
typewriter
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Expired - Lifetime
Application number
US289078A
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English (en)
Inventor
Geser Josefine Rosa
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Individual
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Individual
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Publication date
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Publication of US2281688A publication Critical patent/US2281688A/en
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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

Definitions

  • the invention comprises a number of novel features which, individually, as well as in combination make up the invention.
  • Friction drive rollers for the actuating mecha-- nism of the additional ribbon are. according to the present invention, forced against the platen by spring pressure.
  • Mechanism for changing the direction of the additional ribbon is provided with a power storage device so that, on reversing the direction little power is necessary. This power is furnished through an auxiliary device, for releasing the power of the storage driver, whereby the additional ribbon is not subjected to unnecessary tension.
  • Another feature of the invention consists in a specially constructed check device for preventing the additional ribbon from becoming slack when the platen is turned backward. Known devices for this purpose are defective in that they have more or less lost motion, that is, they do not enter into operation immediately when the platen is turned back.
  • the check device of the present invention consists of a pawl in frictional connection with the platen. When the platen is turned forward, the pawl is released, but when it is turned backward, the pawl checks the mechanism which actuates the additional ribbon.
  • Figure 2 is a section through one of the two housings in which the ribbon supports are lo-' cated, the section being taken on line II-II of Fig. l, and with the apparatus in writing position.
  • Figures 2a and 2b show details-of Figure 2; 2b being taken on the line IIb-IIb of Fig. 2.
  • Figure 2c is an enlarged detail of Fig. 2b.
  • Figure 3 is a section similar to Fig. 2, showing other details, and with the apparatus in retracted position.
  • Figure 4 is a development in section of the front plate of one of the two housings in which the ribbon supports are mounted. the section being taken on line IV--IV of Fig. 3.
  • Figure 5 is a section through the axis of the shift bar, on line V--V of Fig. 3.
  • FIGS 5a. and 5b are respectively side and face views of the tension key for one of the spring means employed.
  • Figure 6 is a plan view of Fig. 5.
  • Figure 7a is a face view of one of the mounting supports provided on the frame of the machine, looking in the direction of the arrow AI (Fig. 6);
  • Figure 7b is a similar view of the other support looking in the direction of the arrow A2 on Fig. 6.
  • reference character. I designates the typewriter platen provided at the ends with the usual rotating knobs la and lb. 2 designates the additional ribbon of the present invention which runs on the ribbon carriers 3a and 3b.
  • the ribbon carriers are each provided with two clutch pins 4 which couple the carriers to gears 5 and are each mounted rotatably on a pin I attached to the housing 6 and retained thereon by a bayonet joint (not shown).
  • 8 and 9 designate two paper guide rollers which are axially slidable in the usual manner on a bar ll. This bar is carried at its ends by rocker arms l'i disposed in the side wall of housing 6.
  • Figure 2 shows a pawl II which serves to prevent the additional ribbon 2 from becoming slack on reverse rotation of platen I. It isjournalled rotatably about the pin l3 and is frictionally connected with platen I. If the latter is rotated in r the direction of the arrow A! the pawl I2 is disconnected. If, on the other hand, the platen l is rotated in the direction of the arrow A4, that is, backwardly, the transmission of the platen causes the pawl part to engage the gear 5, whereby the actuating mechanism of the additional ribbon 2 is stopped, It designates a small auxiliary weight designed to hold pawl l2 in inoperative position.
  • I5 designates a friction roller in frictional engagement with platen l.
  • the roller is toothed and rotatably journalled on pin ii.
  • the teeth of the friction roller mesh with the gear 5, which is coupled with the ribbon carrier in.
  • the pin it is mounted in a rocking lever II which can describe a swinging movement about pin is in the direction of the arrow A5.
  • Lever i1 is provided at its upper end with a pin ['9 which extends into a slot 20b of a shift member 20 adapted to rock about the pivot pin 2
  • the pin ll of the rocking lever I1 is iournalled in a hookshaped cage 22 rotatably mounted on tube 23.
  • the shift member 20 also has a shoulder 231 which, by means of a fixed tube 23 in which the shift bar'24 is disposed, eng es in a groove 24a in the shift bar and carries it along in the oscillating movement.
  • Figure 2c shows the shift member in both of its end positions, the full line indicating the position in which the friction roller I is held engaged with the gear 5 by the pin l8 controlled through the slot 20b, while the dotted line shows the position of the shift member in which the roller I5 is rocked in the direction of the arrow A5, and out of engagement with tooth crown of gear 5.
  • Figure 20 also shows the setting mechanism of the shift member 20 in its end position. It consists of a spring-actuated ball 25 which, in the end positions of the shift member, snaps into corresponding notches x1 and $2 in the shift member and retains it.
  • the pressure of the friction rollers i5 against the platen I is produced by the leaf spring 26 mounted in the cage 22, and is applied against one edge of the surface 23a provided on the tube 23 and thereby imparts to said tube 23, and the friction roller l5 positively connected with it, a tendency to rotate clockwise.
  • the tube 23, in turn, is supported on the surfaces 49a of the support 46 (Fig. 7a) attached to the machine frame.
  • the preliminary tension of the leaf spring 26 is produced by turning tube 23 by means of a key 28 until the edge of surface 23a bears against spring 26 (Figs. 5a and 5b) after the apparatus has been mounted on the typewriter as will be hereinafter explained.
  • a catch 28 (Fig, 2) is mounted in known manner at the ends of the additional ribbon 2.
  • is moved in the direction of the arrow A6 (Fig. 4).
  • a transverse bar 32 is pivoted by means of the pin 33 at the upper end of the steel band 3! (Fig. 4), and is rotatable about a pin 34 mounted rigidly in housing 6.
  • the impact member 35 is drawn downwardly in the guide slot 35a by pin 33a.
  • the knife edge 36 is rigidly connected with the impact member 35, and engages in the groove of the worm 31 and is drawn therefrom on the backward movement of the impact member 35.
  • the member 35 is subject to the action of the spring 38, which tends'to throw it off in the directionof the arrow A1.
  • the storage spring 38 is tensed in the following manner. Assuming the spring to be relaxed, the knife edge 36 is at the right side of the worm 31 (Fig. 4) Housing 6 is rockedabout tube 23 during movement away from the writing position of Fig. 2 to that shown in Fig. 3. The shift wheel 39 is at the left end of the worm 31 (Fig. 4). Wheel 39, when housing 6 i folded back to the writing position (of Fig. 2), strikes against the pawl 40 oscillatably mounted in cage 22 and there tensions the accumulator spring 38, by means of the knife edge running in the worm groove, for one tooth division.
  • the knife edge 33 engages the worm 31 as shown in Fig. 4. when the worm is rotated, the knife edge travels to the left and compresses spring 33. If the link 3
  • the mechanism on the typewriter It can be mounted directly on the machine frame or, as shown herein, it may be mounted in supports 45 and 46 (Figs. 7a and 7b) attached to the machine frame.
  • Support 45 contains a circular opening 47 for the insertion of the tube 23, and the other frame 43 an opening 49 having two flat sides for insertion of the opposite end of tube 23.
  • a yoke 43 is placed over the circular opening 41 (left side of Figs. 5 and 6) and against which a spring pin 52, provided in the tube 23, strikes.
  • the tube 23 On mounting the attachment the tube 23 is first inserted through the opening 41 and the spring 44 compressed by means of the pin 52 until the other end of tube 23 can be inserted in the opening 49a.
  • Fig. 5 shows a tube 23 which at its right hand end is provided with a stud 49 having two flattened portions 49a. said stud being rigidly connected to the tube. These flattened portions 49a. (Fig. 7a) fit in an opening on the frame 46 of the machine.
  • the stud 49 is adapted to be engaged by the key 28.
  • the friction rollers i5 are applied against the typewriter platen l and the tube 23 turned by means of key 28 until the stud 49 is able to enter the opening in the frame of the machine.
  • the tube 23 has a flattened end 230. in each of the housings 22 (Fig. 2), each of the flattened edges bearing against a leafspring 26.
  • the leaf spring 26 When the tube 23 is turned, the leaf spring 26 will become compressed by the aforesaid flattened edges so that the spring tends to impart a rotary movement about the axis of the tube 23, to the housings 22 and hence also to the friction rollers 15 when the apparatus isapplied to the typewriting machine. Consequently the leaf spring 26 serves to press the friction rollers l against the platen.
  • the tube 23 is fastened rigidly onto the frame of the machine and the housing 22 can be rotatably displaced on the tube 23.
  • the sheets to be typed are inserted in the usual manner with the additional ribbon swung out of the writing position.
  • the original sheet is placed under the ordinary ribbon and over the additional ribbon, while the copy sheet is placed under the additional ribbon.
  • a second copy sheet, on which the typing appears, or a protective sheet preventing contact with the original, may be placed between the original and the copy sheet.
  • the shank of which extends through a slot 50 in the housing 6 and is connected rigidly with the impact member 35.
  • has sufficient play in slot 50 so that the knife edge 36 can be removed from the groove in worm 3'! by pressing the knob downwardly.
  • the two housings 6, for the ribbon carriers 3a and 3b, the power accumulator mechanism 35 to 40, the pawls I2, I 3, M for preventing slack in the additional ribbon and the upper paper guide rollers 9, Hi, i l are attached, are rigidly connected with each other by a rotary tube 53 slid over the fixed tube 23.
  • a typewriter attachment for producing du plicate ribbon copies adapted for attachment to a typewriter having a platen
  • said attachment comprising a ribbon, ribbon-carrying means in the form or a tube adapted to be mounted on the typewriter and capable of being swung into and out of writing position with respect to the typewriter platen, a shirt bar axially slidable in said tube to change the direction of travel or said ribbon, friction driving means urged into driving relation with the platen of the typewriter, and means comprising a pair of leaf springs mounted in said tube for urging sair friction means into driving relation with said platen, said friction means being eflective when said ribbon is in both its writing and retracted positions.
  • a typewriter attachment for attachment to a typewriter having a platen for making duplicate ribbon copies comprising a ribbon, ribboncarrying means adapted for mounting on the typewriter to bring the ribbon into operative relation with the typewriter platen, friction means driven by said platen for driving said ribboncarrying means, and axially slidable means comprising a bar for changing the direction of travel of said ribbon.
  • a typewriter attachment to be attached to a typewriter having a platen for making duplicate ribbon copies comprising a ribbon, a pair of ribbon carriers, means for mounting said carriers one at each end of the typewriter platen, a tubular support, means including a bar axially slidable in said support for changing the direction of travel of said ribbon, a second tubular support surrounding said tubular support, ribbon carrier housing means carried by the ends of said second tubular support, and power storage means for actuating said bar from one of its positions to the other.
  • a typewriter attachment for attachment to a typewriter having a platen for making duplicate ribbon copies comprising a ribbon, a pair oi ribbon carriers, means for mounting said carriers one at each end of the typewriter platen, a tubular support, means including a bar axially slidable in said support for changing the direction of travel of said ribbon, power storage means comprising a spring to move said bar from one of its positions to the other to change the direction of travel of said ribbon, a rotatable worm, an impact member having a knife edge for engaging the thread on said worm, said impact member engaging said spring and placing said spring under stress as said impact member moves under the influence of said worm and knife edge to store the energy required for moving said bar.
  • a typewriter attachment for use with a typewriter having a platen for making duplicate ribbon copies, comprising a ribbon, ribbon-carrying means for operative association with the typewriter platen and movable into and out of operative position, friction drive means actuated by the platen to move the ribbon, a ratchet wheel mounted for rotational movement with the ribbon-carrying means, a pawl having two positions in the first of which it engages said wheel to prevent said friction means from actuating the ribbon and in the second of which it is disengaged from said wheel to permit movement of the same, and means for causing the pawl to assume its first position during backward movement or the platen, the engagement of the pawl with the platen causing it to assume said second position during forward movement or the platen.

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  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Common Mechanisms (AREA)
US289078A 1939-05-16 1939-08-08 Ribbon attachment for typewriters for making duplicate copies Expired - Lifetime US2281688A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH543086X 1939-05-16
CH552453X 1940-10-05
CH2331970X 1940-10-09

Publications (1)

Publication Number Publication Date
US2281688A true US2281688A (en) 1942-05-05

Family

ID=32096442

Family Applications (2)

Application Number Title Priority Date Filing Date
US289078A Expired - Lifetime US2281688A (en) 1939-05-16 1939-08-08 Ribbon attachment for typewriters for making duplicate copies
US389084A Expired - Lifetime US2331970A (en) 1939-05-16 1941-04-17 Ribbon attachment for typewriting machines

Family Applications After (1)

Application Number Title Priority Date Filing Date
US389084A Expired - Lifetime US2331970A (en) 1939-05-16 1941-04-17 Ribbon attachment for typewriting machines

Country Status (6)

Country Link
US (2) US2281688A (de)
BE (1) BE438354A (de)
CH (3) CH215414A (de)
FR (2) FR863463A (de)
GB (2) GB543086A (de)
NL (1) NL56624C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2425794A (en) * 1944-05-26 1947-08-19 Geser Josefine Rosa Auxiliary ribbon feed device for typewriters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2425794A (en) * 1944-05-26 1947-08-19 Geser Josefine Rosa Auxiliary ribbon feed device for typewriters

Also Published As

Publication number Publication date
NL56624C (de)
CH215414A (de) 1941-06-30
GB543086A (en) 1942-02-10
US2331970A (en) 1943-10-19
CH219052A (de) 1942-01-15
GB552453A (en) 1943-04-08
CH215961A (de) 1941-07-31
FR863463A (fr) 1941-04-02
FR883494A (fr) 1943-07-06
BE438354A (de)

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