EP0168485A1 - Rotierender drucker mit von schlitten getrenntem antriebsmotor - Google Patents

Rotierender drucker mit von schlitten getrenntem antriebsmotor

Info

Publication number
EP0168485A1
EP0168485A1 EP19850900890 EP85900890A EP0168485A1 EP 0168485 A1 EP0168485 A1 EP 0168485A1 EP 19850900890 EP19850900890 EP 19850900890 EP 85900890 A EP85900890 A EP 85900890A EP 0168485 A1 EP0168485 A1 EP 0168485A1
Authority
EP
European Patent Office
Prior art keywords
drive
carriage
print
arrangement
motor
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.)
Withdrawn
Application number
EP19850900890
Other languages
English (en)
French (fr)
Inventor
Roy Jeremy Lahr
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
Publication of EP0168485A1 publication Critical patent/EP0168485A1/de
Withdrawn legal-status Critical Current

Links

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
    • B41J1/24—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 perpendicular to the axis of rotation
    • B41J1/28—Carriers stationary for impression, e.g. with the types or dies not moving relative to the carriers
    • B41J1/30—Carriers stationary for impression, e.g. with the types or dies not moving relative to the carriers with the types or dies moving relative to the carriers or mounted on flexible carriers

Definitions

  • the magnetic field produced by the motor can be a barrier to the use of design choices that would otherwise be preferable, such as the mounting of a floppy disc station within the printer volume to save desk space, or creating a terminal in which the printed page emerges from the case in the proximity of the cathode-ray tube to minimize eye travel from the cathode-ray screeen to observe whether the printout is occurring satisfactorily. Since this radiated magnetic field changes position during lateral carriage motion, it would be efficient to shield the print element drive motor itself, were it not that the shield would add substantial extra weight to an already very heavy load on the print carriage. Thus, current practice places very heavy magnetic shielding around the field-sensitive components, illustratively the magnetic storage unit or the cathode-ray tube. Of course, this is a costly addition to the word processing system due to the size of the component to be protected.
  • the drive shaft maintains a radial relationship with respect to the pivot of the motor
  • the carriage and rotating printing element maintain a fairly constant position with respect to the carriage path which, as noted, corresponds to a chord of an arc.
  • a varying drive angle is formed between the axes of rotation of the drive shaft and the print element, which requires the use of a universal coupling element. It is, however, a disadvantage of universal coupling elements which are in general use that they have a nonconstant velocity characteristic.
  • the location of the motor in accordance with the invention, need not be stationary with respect to the frame of the printer.
  • the disposing of the ribbon supply arrangement over the motor in an arrangement where the motor travels laterally causes the ribbon supply arrangement to move laterally also.
  • the ribbon supply arrangement would nevertheless maintain the pivotal coupling between the first and second ribbon portions to accommodate for the aforementioned displacement differential resulting from the differences in the speeds of translation of the motor and carriage.
  • the second portion of the ribbon supply arrangement which holds the ribbon in a position intermediate of the printing element and the paper which is to be printed, does not change its orientation with respect to the carriage even though the first portion of the ribbon supply arrangement undergoes an angular displacement with respect to the carriage path as the carriage is translated.
  • Print element drive shaft 35 is mounted on print carriage 37 by means of a front journal bearing 38 and a rear journal bearing 39.
  • the journal bearings are themselves installed on print carriage 37.
  • Print carriage 37 is constrained to move only along a lateral direction by virtue of its being mounted on, and guided by, a front cross-shaft 50 and a rear cross-shaft 51.
  • the print carriage is coupled to front cross-shaft 50 via a front linear bearing set 52 (not shown in detail), and to rear cross-shaft 51 by a linear bearing set 53
  • main drive shaft 21 must be variable in effective length to accommodate for variations in the distance between the main drive motor and the print carriage, in response to the location of the print carriage.
  • main drive motor 20 has a hollow central shaft 87 through which is arranged a frontmost portion of main drive shaft 21.
  • main drive shaft 21 When print carriage 37 is located at the midpoint of its permissible travel, the frontmost end of main drive shaft 21 protrudes slightly from the frontmost end of hollow central shaft 87.
  • a sufficient length of main drive shaft 21 is provided so that when the print carriage moves to the extremes of its travel, the frontmost end of the main drive shaft moves rearward, but is nevertheless retained securely within hollow central shaft 87.
  • FIG. 3B a front view of the mounting system for lower pulley 22 is shown.
  • flexible member 24 couples the rotation of lower pulley 22 to upper pulley 23.
  • upper pulley 23 is then coupled directly to print element drive shaft 35 so as to rotate print disc 36 to select a chosen character for printing.
  • Lower pulley 22 is rotated by drive shaft 21, and drive shaft 21 is in turn held in a lower trunnion plate 96.
  • Lower trunnion plate 96 is coupled to a post shaft 115, which is held in the desired relationship to print carriage 37 by a carriage pivot bearing 120.
  • Carriage pivot bearing 120 is vibration-isolated from print carriage 37 by a pair of vibration isolating pads 516 and 517.
  • the increasing tension produces a correspondingly increasing force component which tends to resist the rotation of the plane of rotation of the lower pulley, which force component translates into a greater force required to drive the print carriage along the cross-shafts.
  • potential energy is stored in the arrangement as a function of carriage displacement on either side of the center point.
  • the use of a constant velocity transmission system such as the one described herein permits a character to be selected while the print carriage is moving to the next print location.
  • the use of a transmission system having a non-constant velocity characteristic would require some adjustment to the angular orientation of the print disc to be performed after the carriage is stopped and the final drive angle determined.
  • the print element can be prepared to perform a printing operation as soon as, or even a short time before, the print carriage has stopped.
  • Fig. 7 shows the compensation arrangement of Figs. 6A and 6B in a position corresponding to the print carriage being translated to the extreme right. Such translation causes post shaft 115 to be rotated clockwise (as viewed from the top), thereby rotating lower drum head 94, trunion plate 96, and lower pulley 22. Since upper drum head 93 is fixed to the print carriage, as shown in Fig. 6B, leaves 95 in Fig, 7 are shown to be angularly displaced.
  • auxiliary print carriage 151 In the dual-print head embodiment of the invention shown in Fig. 11, auxiliary print carriage 151 would be placed at one extreme lateral position along cross-shafts 50 and 51 when rotary print disc 36 on print carriage 37 is being used. Conversely, when auxiliary print head 150 is to be utilized, print carriage 37 would be placed at the extreme right of cross-shafts 50 and 51 and auxiliary print carriage 151 would then be movable to all print locations. In such an embodiment, cross-shafts 50 and 51 are longer than the desired printing width to accommodate the left and right storage positions of auxiliary print carriage 151 and print carriage 37, respectively.

Landscapes

  • Character Spaces And Line Spaces In Printers (AREA)
EP19850900890 1984-01-16 1985-01-16 Rotierender drucker mit von schlitten getrenntem antriebsmotor Withdrawn EP0168485A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US57073784A 1984-01-16 1984-01-16
US570737 2000-05-12

Publications (1)

Publication Number Publication Date
EP0168485A1 true EP0168485A1 (de) 1986-01-22

Family

ID=24280845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850900890 Withdrawn EP0168485A1 (de) 1984-01-16 1985-01-16 Rotierender drucker mit von schlitten getrenntem antriebsmotor

Country Status (2)

Country Link
EP (1) EP0168485A1 (de)
WO (1) WO1985003033A1 (de)

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2248256A (en) * 1940-07-02 1941-07-08 Locke Steel Chain Co Flexible drive
US3052884A (en) * 1956-12-10 1962-09-04 F L Moseley Co Graphical recorders
US3260070A (en) * 1964-09-24 1966-07-12 Preston Martin Universal joint
US3442365A (en) * 1967-09-29 1969-05-06 Friden Inc Font wheel aligning device
US3572238A (en) * 1967-11-15 1971-03-23 Philips Corp Print-head drive
US3707214A (en) * 1969-05-23 1972-12-26 Olivetti & Co Spa Serial printing device
US3695410A (en) * 1970-02-04 1972-10-03 I Q Devices Inc Serial printing machine
US3817367A (en) * 1972-09-01 1974-06-18 Pitney Bowes Inc High speed printer
US3949851A (en) * 1975-01-24 1976-04-13 Victor Comptometer Corporation Motion translation means for high speed printer print head
US4088215A (en) * 1976-12-10 1978-05-09 Ncr Corporation Record media compensation means for printers
JPS5950514B2 (ja) * 1977-06-27 1984-12-08 スタ−精密株式会社 ドツトマトリツクスプリンタ−のプリントヘツド駆動装置
JPS565775A (en) * 1979-06-29 1981-01-21 Nippon Telegr & Teleph Corp <Ntt> Printer
JPS5684968A (en) * 1979-12-14 1981-07-10 Fujitsu Ltd Printer
DE3014286C2 (de) * 1980-04-15 1982-12-23 Triumph-Adler Aktiengesellschaft für Büro- und Informationstechnik, 8500 Nürnberg Druckvorrichtung mit einer motorgetriebenen Typenscheibe
IT1128802B (it) * 1980-06-05 1986-06-04 Olivetti & Co Spa Stampante seriale
JPS6027660Y2 (ja) * 1980-08-11 1985-08-21 ブラザー工業株式会社 印字装置
JPS57150582A (en) * 1981-03-13 1982-09-17 Canon Inc Printing mechanism
JPS57197189A (en) * 1981-03-30 1982-12-03 Fujitsu Ltd Control system for serial printer
JPS5857979A (ja) * 1981-09-17 1983-04-06 ゼロツクス・コ−ポレ−シヨン プリント部材シフト装置
JPS5853472A (ja) * 1981-09-26 1983-03-30 Fujitsu Ltd タイプホイ−ルの位置決め機構
DE3139879A1 (de) * 1981-10-07 1983-04-21 Gold Star Co., Ltd., Seoul Schreibwerk
DE3141207A1 (de) * 1981-10-16 1983-05-05 Tronic Typer AG, 6300 Zug, Fridbach "schreibmaschine"
DD204444B1 (de) * 1982-01-06 1986-09-17 Robotron Optima Bueromaschiene Erkennungseinrichtung an elektronischen schreib- oder bueromaschinen
US4459054A (en) * 1982-01-15 1984-07-10 International Business Machines Corporation Shared character selection, escapement and line advance system for serial printer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8503033A1 *

Also Published As

Publication number Publication date
WO1985003033A1 (en) 1985-07-18

Similar Documents

Publication Publication Date Title
US4444519A (en) Printers
US3872960A (en) High-speed printer with drift compensated cable for carriage
US5000590A (en) Print head adjustment mechanism
US3854563A (en) Arcuate printer
JPS6151997B2 (de)
US5442247A (en) Outer-rotor type spindle motor with a reduced thickness in the axial direction
US5338121A (en) Shuttle apparatus for printer
US6980132B2 (en) Floating aperture encoder
US4657418A (en) High capacity ribbon supply arrangement
EP0064130A2 (de) Farbbandvorschub- und Aufnahmevorrichtung
US4203680A (en) High-speed printer with self-adjusting cable preload mechanism
US4566814A (en) Print head carriage assembly
WO1985003033A1 (en) Rotary printer with off-carriage motor drive
US7097127B2 (en) Mass trim mechanism
US4202639A (en) Daisy loading apparatus
US4049110A (en) Print wheel mounting assembly
CA1064848A (en) Decoupling means for ribbon cartridge mounting plate
US4423973A (en) Ribbon elevating mechanism for ribbon cassettes
US4288168A (en) Arrangement for driving a printer carriage in teletypewriters or data printers
US4446628A (en) Device for determining angle of inclination of ship
WO2012058017A1 (en) Method of assembling a multifunction printer
US6865744B2 (en) Disk drive with compensation of disk eccentricity
US4675764A (en) Drive mechanism for a magnetic head carriage assembly
KR0183888B1 (ko) 가이드롤러 높이 조정용 지그
JPH0611817Y2 (ja) インパクト式活字プリンタ

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19851217