US3804225A - Device in a type printer - Google Patents

Device in a type printer Download PDF

Info

Publication number
US3804225A
US3804225A US00284959A US28495972A US3804225A US 3804225 A US3804225 A US 3804225A US 00284959 A US00284959 A US 00284959A US 28495972 A US28495972 A US 28495972A US 3804225 A US3804225 A US 3804225A
Authority
US
United States
Prior art keywords
cord
hammer
printing
pulleys
drum
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
US00284959A
Other languages
English (en)
Inventor
C Ulin
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3804225A publication Critical patent/US3804225A/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
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/22—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection
    • B41J1/32—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection the plane of the type or die face being parallel to the axis of rotation, e.g. with type on the periphery of cylindrical carriers
    • B41J1/44—Carriers stationary for impression
    • B41J1/46—Types or dies fixed on wheel, drum, cylinder, or like carriers
    • B41J1/50—Types or dies fixed on wheel, drum, cylinder, or like carriers with one or more carriers travelling across copy material in letter-space direction
    • 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
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/005—Cable or belt constructions for driving print, type or paper-carriages, e.g. attachment, tensioning means

Definitions

  • ABSTRACT A motion mechanism in a type printer, wherein the axial displacement of a type drum relative to a printing hammer for setting the required type in position opposite the hammer, and the axial movement of both hammer and type drum for obtaining a new printing position on the sheet, is effected by means of a cord system which consists of a single cord, a type of endless chain. The cord runs over pulleys arranged at each end of the line to be printed, such that the cord is divided into four cord parts extending substantially parallel to the line on the sheet, one cord part supporting the hammer, and one supporting the type drum.
  • two pulleys are arranged in spaced relationship on a plate which is mounted pivotally about an axis lying intermediate the rotational axes for the two pulleys.
  • the cord co-operates with a driving motor operating on that part of the cord which leads to the hammer.
  • Setting of the hammer to a new printing position on the sheet is then effected by displacing the whole cord in its length direcion by means of the driving motor, whereby the hammer and the type drum will move equal distances.
  • Setting of the type drum to a posion with a new type opposite the hammer is made by pivoting the mounting plate for the pulleys, whereby the type drum only is moved, while the hammer is held fixed.
  • the invention relates to a device in a printer comprising a type drum with types arranged around the periphery.
  • the drum is mounted in two ways rotatably, and;
  • the hammer which is pressed against the drum with an interposed printing sheet produces printing on the sheet displacement of the drum and the hammer unit for setting the hammer in desired printing position along the line on the sheet to be printed, and displacement of the drum relative to the hammer for the axial setting of the drum are achieved by means of a cord system comprising a first cord part supporting the hammer unit, and a second cord part supporting the drum and cooperating with pulleys and driving means, which cord parts extend along the line to be printed.
  • the invention has for its object, in such a device, to produce. a simplification of the cord system and a decreaseof the required inertia of the movable parts, thereby enabling higher printing speed.
  • the characteristic for the invention consists in that one end of the first cord part is, via'a return cord, directly connected with'the opposite end of the second cord part. This part in corresponding manner, is via a return cord directly connected with the opposite end of the first cord part.
  • This forms a continuous cord system a type of endless chain, which'supports both the hammer unit and the type drum.
  • the pulleys where the respective cord part is continuous in the return cord, are arranged at a distance from each other on a mounting plate which is swingable about an axis extending substantially parallel to the rotational 'axes for the pulleys, and is situated half-way between the rotational axes for the pulleys.
  • a change of printing position is produced by displacement of the whole cordsystem in the length direction of thecord which conforms both the hammer unit and the typedrum to follow this motion, while axial displacement of the drum relative to the hammer, is produced by pivoting the mounting plate while locking'the. cord part which supports the hammer unit.
  • the cord system consists of one single, continuous cord, a type of endless chain, comprising only four cord parts extending parallel with the line to be printed, two of the cord parts serving to support the hammer unit and the type drum, respectively, and two return cords.
  • Change of the printing position is produced simply by movingthecord in its length direction, whereby both the hammer unit and the drum will be forced to move an equal distance.
  • Change of the position of the type drum relative. to the hammer unit is produced by influencing the mounting plate for the two pivotably mounted pulleys.
  • Thesepulleys can be arranged relatively close to each other, and the mounting plate with pulleys will then have small dimensions resulting in a small inertia mass and short setting time.
  • Suitable stepping motors can be used for both motions, which will give exactly adapted driving steps and automatic locking of the respective driving wheel during intervals between the stepping operation.
  • FIGS. 1 and 2 show two schematic views of the cord system in a device according to the invention.
  • FIG. 3 shows a perspective view of a complete type printer provided with a device according to the invention.
  • FIG. 1 The principle for driving the hammer unit and the type drum in a driving system according to the invention is evident from FIG. 1, in which the hammer unit is designated 10 and the type drum is designated 11.
  • a printing sheet is schematically indicated at 12.
  • the hammer unit is fastened to a first cord part 13 extending between a driving wheel 14 situated on one side of the printing sheet, and'a pulley l5 situated at the opposite side of the printing sheet. From the pulley 15, the cord runs via a cord part 16, to a pulley l7 situated on the same side of the printing sheet as the driving wheel 14. From the last pulley 17, the cord continues via cord part 18, to a further pulley 19 situated at the opposite side of the printing sheet.
  • This cord part 18 supports the type drum 11.
  • the cord From the pulley 19, the cord finally runs through a cord part 20 back to the driving wheel 14.
  • the end portions of the cord are wound a number of turns upon the wheel 14 and frictionally engage to the wheel, whereby the cord will follow the wheel when it is rotated.
  • the driving wheel 14 andthe pulley 17 are mounted on fixed shafts, while the pulleys 15, 19 situated at the opposite. side of the sheet are mounted on amounting plate 21, which is pivotable about an axis 0.
  • the axis 0 is located half-way between the rotational axes for the two pulleys 15, and 19.
  • FIG. 2 where corresponding parts have been provided with the same reference numerals as inFlG. 1, an alternative embodiment of the device according to FIG. 1 is shown.
  • the device according to FIG. 2 is different from that of FIG. 1: only in a slightly different cord arrangement, and in the replacement of pulley 17 (FIG. 1) with two pulleys 24, 25.
  • the arrangement according to FIG. 2 is better in achieving a desired mutual placing of the type drum and the hammer unit.
  • FIG. 2 hammer unit in FIG. 2 is as in FIG. 1 arranged on a cord part leading directly to the drive wheel 14. This wheel determines the position of the hammer unit, and thereby controls the printing position, while the position of the drum relative to the hammer unit is determined by the setting angle of the mounting plate 21.
  • FIG. 3 shows a perspective view of a complete printer constructed in accordance with the principle shown in FIG. 2.
  • the following parts can be recognized: the hammer unit 10, the type drum 11, the cord parts 13, 16, 18, and 20, the driving wheel 14 and the pulleys 24, and and 15 and 19.
  • Pulleys 15 and 19 are arranged on the pivotable mounting plate 21.
  • the driving wheel 14 is arranged on the output shaft of a first stepping motor 30, and the driving wheel 22, which is in engagement with the toothed segment 23 on the mounting plate 21, is connected to the output shaft of a second stepping motor 31.
  • the stepping motor determines the position of the printing hammer, and thereby the printing position, while the stepping motor 31 determines the axial position of the type drum relative to the hammer.
  • the type drum 11 is displaceably arranged on a shaft 32 to which it is angularly locked.
  • the shaft 32 is coupled to a third stepping motor 33, which determines the angular setting of the drum about its rotational axis.
  • the desired type is set opposite the printing hammer.
  • the motion of the hammer for effecting printing is derived from a continuously rotating motor 35, on the output shaft of which a cam disk 36 is fixedly mounted.
  • the cam disk 36 cooperates with a cam follower roll 37 mounted on an actuation arm 39, which arm projects from an actuating bar 38.
  • the actuating bar 38 is pivotally mounted and provided with an actuating shoulder 40, which cooperates with the movably mounted hammer 41. Under the influence of the motor 35, the bar 38 is acted upon in such manner that the shoulder 40 moves back and forth in a direction (shown by the arrows) axial to the hammer unit. In a rest position of the hammer unit, the hammer 41 is free from the shoulder 40 and no printing is effected. When order for printing is obtained, a mag net 42 is excited which influences an armature 43. This armature is connected by a bar 44 to the hammer unit.
  • the hammer unit Upon excitation of the magnet 42, the hammer unit is rotated in such manner that the hammer 41 comes into engagement with the shoulder 40 on the actuating bar 38.
  • the said shoulder next time moves in a direction to the hammer, this hammer will be pressed against the drum 1 1, and printing will be effected.
  • a stepping motor 46 for driving the paper sheet l2, whichis unwound from a storing roll 47.
  • the stepping motor 30 is first stepped forward a step to the next printing position. Thereafter, or simultaneously therewith the required type is set in position opposite the hammer by suitable excitation of the stepping motors 31 and 33. After the setting order is accomplished, magnet 42 is excited, and in described manner causes printing to take place.
  • a printing apparatus comprising:
  • a type drum having types arranged around a periphery thereof, said type drum mounted for both axial displacement and rotation;
  • a printing hammer means movably disposed opposite said type drum, a printing sheet passing therebetween;

Landscapes

  • Character Spaces And Line Spaces In Printers (AREA)
  • Rotary Presses (AREA)
US00284959A 1971-08-31 1972-08-30 Device in a type printer Expired - Lifetime US3804225A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE11034/71A SE357921B (es) 1971-08-31 1971-08-31

Publications (1)

Publication Number Publication Date
US3804225A true US3804225A (en) 1974-04-16

Family

ID=20293237

Family Applications (1)

Application Number Title Priority Date Filing Date
US00284959A Expired - Lifetime US3804225A (en) 1971-08-31 1972-08-30 Device in a type printer

Country Status (8)

Country Link
US (1) US3804225A (es)
JP (1) JPS5311884B2 (es)
CA (1) CA961788A (es)
DE (1) DE2242086A1 (es)
FR (1) FR2151046B1 (es)
GB (1) GB1401012A (es)
IT (1) IT962258B (es)
SE (1) SE357921B (es)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3993180A (en) * 1974-01-25 1976-11-23 Sperry Rand Corporation Drive mechanism for an asynchronous printer
US4459054A (en) * 1982-01-15 1984-07-10 International Business Machines Corporation Shared character selection, escapement and line advance system for serial printer
US4822340A (en) * 1985-10-11 1989-04-18 Duphar International Research B.V. Automatic injector

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51139426A (en) * 1975-05-21 1976-12-01 Casio Computer Co Ltd Printing drum
JPS52142413U (es) * 1976-04-23 1977-10-28
JPS57128583A (en) * 1981-02-02 1982-08-10 Alps Electric Co Ltd Printing apparatus
US4737043A (en) * 1985-07-02 1988-04-12 Xerox Corporation Impact mechanism for quiet impact printer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2757775A (en) * 1953-01-19 1956-08-07 Ibm Single printing element typewriter
US3042174A (en) * 1959-04-24 1962-07-03 Mite Corp Positioning printer
US3228510A (en) * 1963-06-14 1966-01-11 Mite Corp Variable fulcrum selector lever mechanism for printer
US3374873A (en) * 1964-02-17 1968-03-26 Codamite Corp Printing apparatus employing bidirectional stepping motors to position type member
US3422945A (en) * 1967-06-29 1969-01-21 Friden Inc Printing machine character selection structure employing differential means
US3696204A (en) * 1970-05-28 1972-10-03 Teletype Corp Type carrier assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2757775A (en) * 1953-01-19 1956-08-07 Ibm Single printing element typewriter
US3042174A (en) * 1959-04-24 1962-07-03 Mite Corp Positioning printer
US3228510A (en) * 1963-06-14 1966-01-11 Mite Corp Variable fulcrum selector lever mechanism for printer
US3374873A (en) * 1964-02-17 1968-03-26 Codamite Corp Printing apparatus employing bidirectional stepping motors to position type member
US3422945A (en) * 1967-06-29 1969-01-21 Friden Inc Printing machine character selection structure employing differential means
US3696204A (en) * 1970-05-28 1972-10-03 Teletype Corp Type carrier assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3993180A (en) * 1974-01-25 1976-11-23 Sperry Rand Corporation Drive mechanism for an asynchronous printer
US4459054A (en) * 1982-01-15 1984-07-10 International Business Machines Corporation Shared character selection, escapement and line advance system for serial printer
US4822340A (en) * 1985-10-11 1989-04-18 Duphar International Research B.V. Automatic injector

Also Published As

Publication number Publication date
FR2151046A1 (es) 1973-04-13
JPS5311884B2 (es) 1978-04-25
FR2151046B1 (es) 1974-01-04
SE357921B (es) 1973-07-16
JPS4835912A (es) 1973-05-26
CA961788A (en) 1975-01-28
GB1401012A (en) 1975-07-16
DE2242086A1 (de) 1973-03-08
IT962258B (it) 1973-12-20

Similar Documents

Publication Publication Date Title
JPS634846Y2 (es)
US4046246A (en) Serial impact calculator printer
US4024941A (en) Dot matrix type serial printer
EP0227251B1 (en) Printhead transport apparatus
US3804225A (en) Device in a type printer
US3850355A (en) Form feed device with variable split
US4196665A (en) Printing machine arrangements
US3951249A (en) Drive for the movable portion of a printer
JPS5940630B2 (ja) インクリボン送り機構
US3578138A (en) Paper adjusting mechanism
US4123182A (en) Cam drive for matrix print heads and the like
JPS5852510B2 (ja) 印字装置
US3949851A (en) Motion translation means for high speed printer print head
US4511270A (en) Apparatus for lifting print and correction ribbons in typewriters or like machines
US4591882A (en) Printer electromagnetic clutch drive
JPS5658893A (en) Booking machine
US4402622A (en) Ink-ribbon lifting apparatus
JP2545676B2 (ja) 多色プリンタ
CA1046445A (en) High speed reversing drive mechanism
US4820068A (en) Printer having ribbon shift mechanism
JPH0156677B2 (es)
JPH0226594B2 (es)
JP3364979B2 (ja) 後処理装置
JPH0811365A (ja) ヘッドギャップ調整機構
JPH0671819B2 (ja) 熱転写式印字装置