US2909994A - Wire printer - Google Patents

Wire printer Download PDF

Info

Publication number
US2909994A
US2909994A US478650A US47865054A US2909994A US 2909994 A US2909994 A US 2909994A US 478650 A US478650 A US 478650A US 47865054 A US47865054 A US 47865054A US 2909994 A US2909994 A US 2909994A
Authority
US
United States
Prior art keywords
print
print wires
platen
wires
printing
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
Application number
US478650A
Other languages
English (en)
Inventor
Frank J Furman
Otto F Moneagle
Robert V Simpson
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
Original Assignee
International Business Machines Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to NL202952D priority Critical patent/NL202952A/xx
Priority to IT565291D priority patent/IT565291A/it
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US478650A priority patent/US2909994A/en
Priority to FR1165857D priority patent/FR1165857A/fr
Priority to GB36610/55A priority patent/GB815813A/en
Application granted granted Critical
Publication of US2909994A publication Critical patent/US2909994A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/27—Actuators for print wires

Definitions

  • This invention relates to wire printers and more particularly to wire printers of the type in which the print ends of preset print wires are moved against recording material by a print head secured to guide tubes for the print wires. Such printers effect what is generally termed front printing.
  • a front printing wire printer is disclosed in the United States patent application, Serial No. 384,697, of Reynold B. Johnson, filed October 7, 1953, now US. Patent No. 2,785,627.
  • inertia slugs are attached to the respective print wires so that when the print ends of preset print wires are made to undergo a printing stroke, a requisite energy level obtains, preventing too free an endwise movement of the wires undergoing impact.
  • Another advantage that obtains from the use of the instant invention is that of visible printing in front wire printers.
  • the additional bend in the tubes conducting the print wires permits of horizontal printing strokes,'thereby enabling an operator standing in front of the'machine to visually keep check of the printing as it takes place upon a recording material progressively moved upward past the print head.
  • Fig. 2 isa chart depicting the timing of various elements of the embodiment disclosed in Fig. l. I
  • the wire setting mechanism for the wire printer is shown as being mounted on a vertical plate 12.
  • This plate is mounted in the printer by a plurality of cross bars 14, 16, 18, and 20. It is seatedon bar 14 by means of a notch 22 and is held in spaced relation therealong byacorhb 24.
  • the other bars constitute guide bars and are respectively provided with combs 26,28, and 30 to locate accurately the plate in transverse relation with respect to the printer.
  • the code rod which is mounted in the carrier tube for rotational and endwise displacement, is biased upwardly to a normal position by a tension spring 48.
  • the lower end of the code rod is provided with a gear 50 and a thrust washer. 52 by which rotation and endwise translation are imparted to the code rod to enable it to effect different character patterns on the print wires when moved thereagainst by the bail 37.
  • the setting up of the print wires by engagement with the code rod' is effected by moving the bail 37 by a continuous rotatable double cam 54.
  • This cam which is fixed upon a shaft 56 rotatably mounted in a honsing 58 of the printer, simultaneously operates a pair of rocker arms 60 respectively mounted on vertically-spaced, transversely-extending shafts 62 carried by the housing 58.
  • Each rocker arm carries on its free end a roller 64 which rides upon the surface of the cam. The roller is urged to follow the contour of the cam through a spring 66 which acts upon a vertically extending lug 68 formed on each rocker arm.
  • the rocker arm motion is imparted to the bail 37 through, a vertical arm 70'affixed to each shaft 62.
  • Each arm 70 is provided at its free end with an adjustable screw 72 which engages a corresponding member 74 slidably carried by a bar 75 fixed to the housing 58.
  • the cam 54 imparts rotational movement to the rocker arms 60 against the bias of the respective springs 66, the arms 70 act through the screws 72 to displace rearwardly the slide members 74 and in turn corresponding ones of the laterally-turned lugs 38a formed of the rear plate 38 of the wire setting bail 37.
  • the surface of the cam 54 is such that the movement of the bail 37 carrying the code rod against the print wire ends'is a sharp, forceful one. Thereafter, the cam surfaces recede slowly underneath the rollers 64 to allow the spring 78 to withdraw the code rod from the ends of the print wires and permit longitudinal displacement of the preset print wires during a subsequent printing stroke.
  • the preset print wires even though they are partly restored by the printing impact, will be in a displaced condition.
  • the rearward edge of the bail is cut away to form flanges 80, and in between the flanges are located relatively low mass inertia slugs 82 secured to the respective print wires 36.
  • The'ends of these slugs are headed at 82a and 82b, and the flanges extend between adjacent slugs so as to lie between the heads on each of the adjacent slugs.
  • the row of flanges is so located that when the cam 54 has rotated to where its low dwells are opposite the rollers 64, the
  • a stop bar 86 is mounted on the plate 12 to cooperate with the inertia slugs. This bar is in the path of the heads 82b on the rear ends 'of' the slugs and thus insures that none of the wires will. be projecting into the code rod carrier tube when the code rod is adjusted.
  • the print wire guide tubes 32 extend away from the plate 34in broad sweeping curves to where they are gathered together to form a cable generally indicated by the numeral 88.
  • the cable is secured to the upper end of the plate 12 as by straps 90.
  • Above the plate the cable is curved so that the ends of the tubes extend horizontally into a print head 92 to which they are affixed. Printing strokes are effected by this print head, which is carried in a carriage 94 transversely adjustable on a support 95, through a horizontal to'and fro movement.
  • the tubes terminate in the print head so that the normal positions of the 'print'ends of the print wires projecting from the tubes are approximately flush with the print face of the print head.
  • the print wires which are preset to determine a character pattern, will thus project from the face of the print head, and when the print head undergoes a printing stroke, they may strike a ribbon 96 disposed in front of a paper 98 on a'platen 100 to impress a character.
  • the reciprocation of the print head upon the carriage 94 is effected through a drive wire 102 mounted in a guide tube 104.
  • This tube is fixed at one end to the carriage and at its other end to a removable piece 105 fastened to a housing 106 secured in the framework of the printer; (The flexible tube 104 and wire 102 accommodate lateral adjustment of the print head carriage 94 in the printer.)
  • the rear end of the print head drive wire is pivotally connected to the upstanding arm 108a of a bell crank, generally indicated by the numeral 108, rotatably mounted on a shaft 110 carried by depending arms 106a of the housing 106.
  • a spring 112 coacting between the vertical arm 108a and an anchor plate 114 fixed to the housing 106, biases the rocker arm 108 counterclockwise, as seen in Fig. 1', to where a roller 116 carried on the free end of a horizontally extending arm of the bell crank rests on the surface of a cam 118.
  • This cam has a high dwell formed with a depression into which the roller 116 drops when the depression comes opposite it; because of the spring 112 there is then imparted to the bell crank a sharp counterclockwise movement which thrusts the drive wire through the tube to force the print head to undergo a printing stroke. Almost immediately the end of the depression in the cam forces the bell crank clockwise to withdraw the drive wire through the tube and the print head back to normal position. Thus, a sharp printing stroke of uniform intensity is always obtained.
  • the starting point of a cycle has beenarbitra'rily chosen as that at which the cam 54 begins to move the wire setting bail 37 laterally to bring the already set up code rod 46 against the prealigned control ends of the print wires 36.
  • the displacement of the wire setting bail may reach a maximum at 108 cycle time.
  • the bail may engage the ends of the selected print wires to begin their longitudinal displacement with respect to the remaining print wires. This relative displacement would also be completed at 108 of cycle time.
  • the bail 37 immediately begins to recede, and after a suflicient distance has been created between the ends of the selected or preest print wires and the code rod 46, the print head may be made to undergo a printing stroke. This may occur between 118 and 223 degrees of cycle time, printing actually taking place at about 158. A partial restoration of the preset print wires will occur as a result of the printing impact. Immediately after the'printing impact, however, the. heads 82a on the forward ends of the inertia slugs 82 on the print wires will be engaged by the laterally turned flanges formed on the rear end of the wire setting bail 37.
  • a printer having a platen, a plurality of print wires, support means for guiding the print wires first in one curve and then in a second curve to terminal positions opposite said platen, means for effecting selective longitudinal displacement of the print wires to preset them and thereafter being inoperative to restrain endwise movement thereof, and. other means for effecting relative movement between the end of the displaced print wires opposite said platen and said platen in the longitudinal direction of said ends to obtain a printing stroke, the two curves in said support means providing resistance to endwise displacement of said print wires suflicient to enable printing impact while permitting endwise displacement on printing impact so that a uniform component dot pattern is obtained.
  • a printer having a platen, a plurality of print wires, means for effecting selective longitudinal displacement of-the print wires to preset them and thereafter being inoperative to restrain endwise movement thereof, means for supporting one end of each wire adjacent said means and guiding the wire first in one curve and then in a second curve to dispose its print end opposite said platen, and other means for effecting relative movement between the print ends of displaced print wires and the platen in the longitudinal direction of said ends to obtain printing impact, the two curves in the guiding means providing resistance to endwise displacement of the print wires suflicient to enable printing impact while permitting endwise displacement on printing impact so that a uniform component dot pattern is obtained.
  • a printer having a platen, a plurality of print wires, means for effecting selective longitudinal displacement of said print wires to preset them and thereafter being inoperative to restrain end-wise movement thereof, individual tubes curved first in one direction and then in another guiding the respective print wires and disposing their print ends opposite said platen and their other ends adjacent said means, and other means for effecting relative movement between the print ends of displaced print wires and said platen in the longitudinal direction of said ends to obtain printing impact, the two curves in the tubes providing resistance to endwise displacement of the print wires sufficient to enable printing impact while permitting endwise displacement on printing impact so that a uniform component dot pattern is obtained.
  • a wire printer having a platen, a plurality of print wires respectively bearing inertia slugs, means for effecting selective longitudinal displacement of said print wires to preset them and thereafter being inoperative to restrain endwise movement thereof, individual tubes curved first in one direction and then in a second direction guiding the respective print wires from said wire setting mechanism to a position in front of said platen, and other means for effecting relative movement between said platen and the ends of said print wires in front of it in the longitudinal direction of said ends to obtain printing impact, the two curves in the tubes providing resistance to endwise displacement of the print wires suflicient to enable printing impact while permitting endwise displacement on printing impact so that a uniform component dot pattern is obtained.
  • a printer having a platen, a plurality of print wires, means for imparting a selective longitudinal displacement to said print wires to preset them and thereafter being inoperative to restrain endwise movement thereof, individual tubes curved first in one direction and thereafter in another direction to guide the respective print wires from said means to a position in front of said platen, and means afiixed to the ends of said tubes adjacent said platen to move them toward and away from said platen in the' longitudinal direction of said ends so that the selectively displaced print wires undergo printing impact therewith, the two curves in the tubes providing resistance to endwise displacement of the print wires sufiicient to enable printing impact while permitting endwise displacement on printing impact so that a uniform component dot pattern is obtained.
  • a printer having a platen, a plurality of print wires, individual tubes curved first in one direction and thereafter in another direction guiding the respective print wires, said tubes being gathered together to form a cable between the first and the second curves and being fixed to a support thereat, means operable upon one end of each of said print wires to impart selective longitudinal displacement thereto to preset them and thereafter being inoperative to restrain endwise movement thereof, and means disposed in front of said platen and carrying the end of-the cable of tubes towards and awayfrom the platen in the longitudinal direction of said ends so that the selectively displaced print wires undergo printing impact, the two curves in the tubes providing resistance to endwise displacement of the print wires suificient to enable printing impact while permitting endwise displacement on printing impact so that a uniform component dot pattern is obtained.
  • a printer having a platen, a plurality of print wires, individual tubes curved first in one direction and thereafter in a horizontal direction guiding the respective print wires, said tubes being gathered together to form a cable between the first and the second curves and being fixed to a support thereat, means operable upon one end of each of said print wires to impart selective longitudinal displacement thereto to preset them and thereafter being inoperative to restrain endwise movement thereof, and means disposed in front of said platen and carrying the end of the cable of tubes horizontally towards and away from the platen so that the selectively displaced print wires undergo printing impact, the two curves in the tubes providing resistance to endwise displacement of the print wires sufiicient to enable printing impact while permitting endwise displacement on printing impact so that a uniform component dot pattern is obtained.
  • a wire printer having a platen, a print head movable towards and away from said platen, a plurality of guide tubes affixed at one end to said print head so as to lie in the direction of said platen and extending therefrom first in one curve and thereafter in other curves, a print wire disposed in each of said guide tubes and projecting from the respective ends thereof, means operable upon the ends of the print wires extending from the other ends of the tubes to impart selective longitudinal displacement thereto and so that the print ends thereof project beyond the face of said print head to preset them and thereafter being inoperative to restrain endwise movement thereof, and means operable thereafter to move said print head towards and away from said platen so that the selectively displaced print wires undergo printing impact therewith, the two curves in the guide tubes providing resistance to endwise displacement of the print wires suflicient to enable printing impact while permitting endwise displacement on printing impact so that a uniform component dot pattern is obtained.
  • a print head s as to lie in the direction of said platen movable towards and away from said platen,.a plurality of guide tubes affixed at one end to said print head and extending therefrom first in a downwardly sweeping curve and thereafter in horizontally sweepingcurves, a print wire disposed in each of said guide. tubes and projecting from the respective ends thereof, first means operable upon the ends of the print wires extending from the other ends of the tubesto impart selective longitudinal displacement thereto and so. that the print ends thereof project beyond the face of said print head to preset them and thereafter beinginoperative. to restrain endwise movement thereof, second; means operable thereafter to move said print head towards and.
  • the two curves in the guide tubes providing resistance to endwise displacement of the print wires suflicient to enable printing impact while permitting endwise displacement on printing impact so that a uniform component dot pattern is obtained, a collet on each wire between'the end of the respective tube and the first means, and means operable after each printing impact to realign the print wires by displacement by the first means.
  • a printer having a platen, a plurality of print wires,'support means for guiding the print wires first in one curve and then in a second curve to terminal positions opposite said platen, means for selectively efiecting relative longitudinal displacement of the print wires to .form desired character patterns at the terminal positions to preset them and thereafter being inoperative to restrain endwise movement thereof, and other means for effecting relative movement between the ends of the print wires forming the desired character pattern and said .platen in the longitudinal direction of said ends to obtain printing impact, the two curves in said support means providing resistance to endwise displacementof said print wires sufiicient to enable printing impact while permitting endwisei displacement on .printing impact so that a uniform component dot pattern is obtained.
  • a printer having. a platen, aprint head movable towards and away from said platen, flexible guide means affixed at one end to said print head so as to lie in the direction of said platen and extending therefrom first in one curve and thereafter in a second curve, print wires slidably supported by said flexible guide means, means for selectively effecting relative longitudinal displacement of the print wires to form desired character patterns upon ends thereof projecting from said print head to preset them and thereafter being inoperative to restrain endwise movement thereof, and means operable to move said print head towards and away from said platen so that the ends of the print wires forming a desired character pattern undergo printing impact therewith, the two curves in said guide means providing resistance to endwise displacement of said print wires sufiicient to enable printing impact While permitting endwise displacement on printing impact so that a uniform component dot pattern is obtained.

Landscapes

  • Handling Of Sheets (AREA)
  • Common Mechanisms (AREA)
US478650A 1954-12-30 1954-12-30 Wire printer Expired - Lifetime US2909994A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL202952D NL202952A (en)) 1954-12-30
IT565291D IT565291A (en)) 1954-12-30
US478650A US2909994A (en) 1954-12-30 1954-12-30 Wire printer
FR1165857D FR1165857A (fr) 1954-12-30 1955-12-19 Machine d'impression à fils à grande vitesse
GB36610/55A GB815813A (en) 1954-12-30 1955-12-21 Wire printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US478650A US2909994A (en) 1954-12-30 1954-12-30 Wire printer

Publications (1)

Publication Number Publication Date
US2909994A true US2909994A (en) 1959-10-27

Family

ID=23900810

Family Applications (1)

Application Number Title Priority Date Filing Date
US478650A Expired - Lifetime US2909994A (en) 1954-12-30 1954-12-30 Wire printer

Country Status (5)

Country Link
US (1) US2909994A (en))
FR (1) FR1165857A (en))
GB (1) GB815813A (en))
IT (1) IT565291A (en))
NL (1) NL202952A (en))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3400798A (en) * 1967-08-21 1968-09-10 Friden Inc Last character visibility mechanism for a matrix page printer

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1508532A (en) * 1923-05-21 1924-09-16 Quentell Corp Printing mechanism
US1932914A (en) * 1931-12-08 1933-10-31 Dothan L Shelton Typewriting machine
US2129065A (en) * 1937-07-06 1938-09-06 Joseph N Loop Apparatus for printing characters
US2438071A (en) * 1944-12-23 1948-03-16 Ibm Perforated card controlled alphabet and numeral printer
US2524127A (en) * 1946-11-06 1950-10-03 Ibm Printing character forming wires
US2632386A (en) * 1949-04-20 1953-03-24 Burroughs Adding Machine Co Wire type printing machine
US2648277A (en) * 1948-12-23 1953-08-11 Burroughs Adding Machine Co Card controlled wire printing and feeding means
US2681614A (en) * 1949-09-27 1954-06-22 Burroughs Corp Recording machine with grouped recording elements operable selectively to form data-representations
US2683410A (en) * 1949-03-08 1954-07-13 Burroughs Corp Selective wire printing machine
US2686469A (en) * 1954-08-17 Toggenburger

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686469A (en) * 1954-08-17 Toggenburger
US1508532A (en) * 1923-05-21 1924-09-16 Quentell Corp Printing mechanism
US1932914A (en) * 1931-12-08 1933-10-31 Dothan L Shelton Typewriting machine
US2129065A (en) * 1937-07-06 1938-09-06 Joseph N Loop Apparatus for printing characters
US2438071A (en) * 1944-12-23 1948-03-16 Ibm Perforated card controlled alphabet and numeral printer
US2524127A (en) * 1946-11-06 1950-10-03 Ibm Printing character forming wires
US2648277A (en) * 1948-12-23 1953-08-11 Burroughs Adding Machine Co Card controlled wire printing and feeding means
US2683410A (en) * 1949-03-08 1954-07-13 Burroughs Corp Selective wire printing machine
US2632386A (en) * 1949-04-20 1953-03-24 Burroughs Adding Machine Co Wire type printing machine
US2681614A (en) * 1949-09-27 1954-06-22 Burroughs Corp Recording machine with grouped recording elements operable selectively to form data-representations

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3400798A (en) * 1967-08-21 1968-09-10 Friden Inc Last character visibility mechanism for a matrix page printer

Also Published As

Publication number Publication date
GB815813A (en) 1959-07-01
IT565291A (en))
FR1165857A (fr) 1958-10-30
NL202952A (en))

Similar Documents

Publication Publication Date Title
US3057294A (en) Inking systems for printing machines
US3227259A (en) Electrically operated printer with type body axially movable and rotatable
US2734614A (en) Proportional ribbon feed mechanism
ES352122A1 (es) Perfeccionamientos en la construccion de dispositivos im- presores.
US3152543A (en) Pivotal carriage for traveling roller platens
US2909994A (en) Wire printer
US3433153A (en) Printer with swiveling pushrods
US3584722A (en) Carbon ribbon vibrating device for a type bar typewriter
US3126998A (en) palmer
US2785627A (en) Wire printer
US3698529A (en) Serial printer with fixed interposer
US2831558A (en) Variable proportional letter feed mechanism
US1547150A (en) Cash register
US2741355A (en) Floating escapement mechanism
US3308749A (en) Print impression control for specially configured type elements
US3648602A (en) Parallel input printing mechanism
US2117451A (en) robertson
US2802415A (en) Printing mechanism for printing a number
US2771025A (en) Print impression mechanism
US3915086A (en) Printing apparatus
US3752069A (en) Back printer print line visibility control
US4150619A (en) Printer for different character densities
US2749985A (en) Typewriting and code perforating machine
US3774745A (en) Apparatus for adjusting the impact force of types
US2907270A (en) Wire printer