US3880016A - Variable displacement apparatus for platen and tractor feed - Google Patents

Variable displacement apparatus for platen and tractor feed Download PDF

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Publication number
US3880016A
US3880016A US448870A US44887074A US3880016A US 3880016 A US3880016 A US 3880016A US 448870 A US448870 A US 448870A US 44887074 A US44887074 A US 44887074A US 3880016 A US3880016 A US 3880016A
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US
United States
Prior art keywords
gear
motion transfer
shaft
platen
transfer means
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
US448870A
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English (en)
Inventor
John W Jamieson
Ronald G Weller
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.)
Qume Corp
Original Assignee
Qume 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 US448870A priority Critical patent/US3880016A/en
Application filed by Qume Corp filed Critical Qume Corp
Priority to CA221,427A priority patent/CA1005834A/en
Priority to DE2509838A priority patent/DE2509838C2/de
Priority to SE7502529A priority patent/SE409188B/sv
Priority to GB9403/75A priority patent/GB1496416A/en
Priority to NL7502753A priority patent/NL7502753A/xx
Priority to FR7507314A priority patent/FR2272841B1/fr
Priority to JP50027907A priority patent/JPS50125820A/ja
Application granted granted Critical
Publication of US3880016A publication Critical patent/US3880016A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D11/00—Clutches in which the members have interengaging parts
    • F16D11/14—Clutches in which the members have interengaging parts with clutching members movable only axially
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/24—Detents, brakes, or couplings for feed rollers or platens
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/26—Pin feeds
    • B41J11/30—Pin traction elements other than wheels, e.g. pins on endless bands
    • 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
    • B41J19/76—Line-spacing mechanisms
    • B41J19/78—Positive-feed mechanisms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S400/00—Typewriting machines
    • Y10S400/902—Stepping-motor drive for web feed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19614—Disconnecting means

Definitions

  • the drive train includes a first gear rotatably mounted on the platen shaft, a second gear secured to the platen shaft inboard of the first gear and a motion transfer plate slideably and rotatably received on the platen shaft.
  • the motion transfer plate has a pair of arcuately shaped beveled gear surfaces normally engaged with a beveled inner gear surface of the first gear when the transfer plate is in a first position on the platen shaft.
  • the beveled gear surfaces are joined by a pair of wall surfaces which are embraced by a pair of arms integral with the second gear.
  • the motion transfer plate is secured to a control shaft having an adjustment knob, the control shaft being slideably received in a bore in the platen shaft and normally biased by a spring to the first position.
  • the sheet is aligned relative to the detent position by displacing the control shaft inwardly until the motion transfer plate is disengaged from the first gear and by rotating the transfer plate by means of the knob and control shaft to adjust the angular position of the platen, the second gear and the tractor feed apparatus relative to the stepping motor detent position.
  • the control shaft and motion transfer plate return under the action of the spring to the first position.
  • a pair of alignment devices are used in conjunction with two independently rotatable platen halves and independently operable drive trains and stepping motors to provide independent alignment of a pair of flexible sheets associated thereto.
  • This invention relates to document feed mechanisms which are used to transport sheetlike materials along a feed path past a work station. More particularly, this invention relates to document feeding mechanisms in which the document is incrementally fed past the work station and is maintained in a stationary position for a finite period of time by a detent mechanism.
  • Document transport mechanisms are known in which a flexible sheet of material, e.g., paper, is intermittently transported past a work station, such as the platen print area of a typewriter or a rotary printer.
  • the drive mechanism includes a detent device for maintaining the flexible sheet at a fixed position while a line of characters is being printed. Both mechanical detents and also stepping motors having a detent provided by electrical means have been employed for this purpose.
  • the detent provided by the drive arrangement is ordinarily fixed so that for each incremental movement between adjacent detent positions of the feed device, the flexible sheet is transported a fixed linear distance.
  • the flexible sheet on which characters are to be printed may have been preprinted with other textual material, or with lines, with reference to which the characters to be added during the printing process must be aligned. If the linear distance from the leading edge of the flexible sheet to the first of such reference lines is not an integral multiple of the unit detent spacing, the characters will inevitably be misaligned after printing.
  • the invention comprises an apparatus for enabling manual alignment of a flexible sheet in a transport device having automatic detent, which apparatus is inexpensive to fabricate, reliable in operation and capable of providing variable alignment over the entire detent interval.
  • an incremental stepping motor providing document detent drives a unique clutch assembly through an intermediate gear.
  • the clutch assembly includes a first gear rotatably mounted on a platen shaft and having a toothed outer periphery in engagement with the intermediate gear and an inner beveled gear surface opening outwardly in the inboard direction of the printing device.
  • a motion transfer plate having a pair of opposed arcuately shaped gear surfaces beveled in the same direction as the inner gear surface of the first gear and joined by a pair of wall surfaces is slideably and rotatably received on the platen shaft, the gear surfaces of the first gear and the motion transfer plate being designed for mutual engagement.
  • a second gear secured to the platen shaft inboard of the first gear has a pair of arcuately shaped extension arms which embrace the sidewalls of the motion transfer plate to be driven thereby.
  • the motion transfer plate is secured to a control shaft having an adjustment knob, the shaft being slideably received in a bore on the platen shaft and normally biased by a spring to a first position in which the beveled gear surfaces are enmeshed.
  • alignment of the flexible sheet carried by the platen and a tractor feed apparatus is effected by displacing the central shaft in the inboard direction to disengage the motion plate from the first gear and by rotating the motion transfer plate by means of the knob and shaft to thereby adjust the angular position of the platen, second gear and tractor feed apparatus relative to the detent position while maintaining the motion transfer plate free of the first gear.
  • the shaft is released and the shaft and motion transfer plate are returned to the normal first position by the spring so that the beveled gear surfaces are enmeshed.
  • Operation of the stepping motor drives the platen incrementally via the intermediate gear, the first gear, the motion transfer plate and the second gear.
  • Operation of the stepping motor also drives the tractor feed apparatus via the second gear, an additional intermediate gear and a tractor feed drive gear.
  • FIG. 1 is a front view of a printer incorporating the preferred embodiment of the invention
  • FIG. 2 is a perspective view of one end of the printer of FIG. 1 illustrating the sheet transport drive train;
  • FIG. 3 is a partial sectional view illustrating the preferred embodiment of the invention in the normal drive position
  • FIG. 4 is a sectional view taken along lines 4-4 of FIG. 3;
  • FIG. 5 is a partial sectional view illustrating the relative position of certain elements of the invention during document alignment.
  • FIG. 1 is a front elevational view, partially broken away, of a printer embodying the preferred embodiment of the invention.
  • the printer includes a cover member 10 enclosing a printing mechanism of the flying wheel type which includes an inked ribbon cartridge 12 of the type disclosed in co-pending patent application, Attorney Docket No. 5381-3 filed herewith, the cartridge 12 being mounted on a traveling carriage for lateral movement along a conventional platen I3.
  • Platen 13 is provided with a pair of adjustment knobs l4, 15 at opposite ends thereof to enable manual feeding of a document along a feed path.
  • a conventional bail l6 mounted in operative relation to platen 13 is a conventional bail l6 having a plurality of rollers 17 mounted thereon.
  • tractor feed mechanism is a conventional device for feeding sheet-like material from the print station located therebelow and having a pair of feed heads, 22, 23 adjustably carried by a support rod 24 and a splined drive shaft 25.
  • feed head 22, 23 includes a belt 26 composed of rubber or other suitable high friction material and having a plurality of spaced cone-like projections 27 insertable through correspondingly spaced perforations 29 in the edge of the sheet material 28 (See FIG. 2).
  • Each feed head 22, 23 further includes cover 34 provided with a bias spring 35 for holding the cover in the open position during loading of the sheet material 28.
  • FIG. 2 shows a perspective view of the right end of a portion of the printer shown in FIG. 1 with cover elements and knob removed and illustrates the sheet transport drive train arrangement employed therein.
  • a gear 38 coupled to the output shaft of a conventional stepping motor 39 (FIG. 3) is mounted in driving engagement with an intermediate gear 40 rotatably mounted on sidewall 20.
  • Intermediate gear 40 drives a gear 41 rotatably mounted on platen shaft 42.
  • Gear 41 drives a gear 44 in a manner to be described which in turn is coupled to a gear 45 rotatably mounted on sidewall 20.
  • Gear 45 drives a gear 46 which is secured to tractor feed drive shaft 25.
  • gear 41 is rotatably mounted on a reduced diameter portion of platen shaft 42 and secured in place by a clip ring 50.
  • Gear 41 has an inner beveled gear surface 52 which opens outwardly in the inboard direction.
  • a motion transfer plate 54 having a central bore 55 best shown in FIG. 4 is slideably received on the outer surface of platen shaft 42.
  • Platen 54 has a pair of parallel sidewalls 56, 57 terminating in a pair of oppositely disposed arcuately shaped beveled gear surfaces 58, 59 having a contour conformable with inner gear surface 52 of gear 41.
  • Plate 54 is also provided with a transverse bore 61 for receiving a locking pin 62 translatably received in a transverse slot 64 in platen shaft 42 and passing through a transverse bore 65 in a stub shaft 66.
  • Stub shaft 66 is reciprocably received in a counter bore 67 in platen shaft 42 and is normally biased in the outboard direction of the printer by a bias spring 68 disposed in a blind bore 69 in platen shaft 42.
  • Knob 15 is secured to the outer end of stub shaft 66 by means of a lock screw 70 or other equivalent means.
  • Parallel sidewalls 56, 57 of plate 54 are embraced by a pair of arcuately shaped extension arms 72, 73 integrally formed on gear 44 which, as noted above, is pinned to platen shaft 42 inboard of gear 41.
  • Platen shaft 42 is rotatably carried in sidewall by a bearing 75 and is provided with a conventional outer sleeve 76 located between the inner end of bearing 75 and the outer end of platen 13.
  • the opposite (left) end of platen 13 is provided with a similar bearing 75 and sleeve 76, and knob 14 is rigidly secured to the outer end of platen shaft 42 in a manner similar to knob 15.
  • Gear 45 is rotatably secured to sidewall 20 by means of a bearing bolt 80 and spacer 81, bearing bolt 80 being threaded into a threaded opening in sidewall 20.
  • Tractor feed drive gear 46 is pinned to the outer end of tractor feed drive shaft 25, the latter element being supported in end wall 20 by means of bearings 83, 84.
  • stepping motor 39 In normal operation, as stepping motor 39 intermittently rotates output gear 38, this rotation is transmitted to platen 13 and tractor feed drive shaft via elements 40, 41, 54, 44, 42, 45, and 46. As will be evident, when stepping motor 39 is in the detent mode of operation, both platen 13 and tractor drive assembly 21 are locked to prevent movement of sheet material 28. To provide alignment of sheet material 28 relative to the detent position of drive gear 38, the preferred embodiment is operated in the following manner.
  • knob 15 and shaft 66 are manually translated in the inboard direction, thereby compressing spring 68 and causing motion transfer plate 54 to be correspondingly translated by pin 62 in the inboard direction a sufficient distance to cause gear surfaces 58, 59 to move clear of inner gear surface 52 of gear 41.
  • Knob 15 and shaft 66 are next rotated in the desired direction to cause platen 13 and tractor drive shaft 25 to be correspondingly rotated via gear 44 and platen shaft 42 and gears 45 and 46, respectively.
  • knob 15 is released and spring 68 forces shaft 66 in the outboard direction to the normal rest position shown in FIG. 3, As shaft 66 moves outwardly, pin 62 translates motion transfer plate 54 a corresponding amount to the normal rest position in which gear surfaces 58, 59 are engaged with inner gear surface 52 of gear 41.
  • normal drive operation may then proceed.
  • document feed mechanisms constructed in accordance with the above invention enable alignment of the transported document over the entire detent range provided by the stepping motor 39. It should be noted that the arrangement described above may be used in other document feed applications in which a tractor feed assembly is not required. Further, by a simple extension of the invention a split platen comprising two axially divided independently rotatable platen halves may be employed, with each platen half incorporating independently operable document feed devices, each having a construction substantially identical to that described above. An installation of this type has the further advantage that two document feed devices which are independently operable may be individually adjusted to conform with differing alignment requirements. Such an arrangement enables a single printer to operate on pairs of documents which may be individually aligned in accordance with the requirements of any given application.
  • first gear means coupled to said drive train
  • said first gear means is rotatably mounted on said platen shaft and has an outer gear surface driven by said drive train and a beveled inner gear surface;
  • said motion transfer means comprises a gear plate translatably received on said platen shaft adjacent said first gear and having a pair of oppositely disposed beveled gear surfaces joined by a pair of wall surfaces and engageable with said inner gear surface;
  • said second gear means is secured to said platen shaft adjacent said motion transfer means and is provided with a pair of arms extending towards said gear plate and embracing said wall surfaces thereof.
  • said translating means comprises a translatable shaft secured to said motion transfer means, said translatable shaft being received in an open bore in the end of said platen shaft, and means for biasing said shaft in an axial direction to urge said motion transfer means to said first position.
  • a stepping motor mounted on said housing and having an output gear, said stepping motor providing a detent position
  • a platen having a shaft rotatably mounted on said housing for feeding flexible sheet material past said print station;
  • motion transfer means for transferring motion of said first gear to said second gear when said motion transfer means is in a first position
  • said first gear means is rotatably mounted on said platen shaft and has an outer gear driven by said output gear and a beveled inner gear surface;
  • said motion transfer means comprises a gear plate translatably received on said platen shaft adjacent said first gear and having a pair of oppositely disposed beveled gear surfaces joined by a pair of wall surfaces, said beveled gear surfaces being engageable with said inner gear surface of said first gear means; and
  • said second gear means is secured to said platen shaft adjacent said motion transfer means and is provided with a pair of arms extending towards said gear plate and embracing said wall surfaces thereof.
  • said translating means comprises a translatable shaft secured to said motion transfer means.
  • said translatable shaft being received in an open bore in the end of said platen shaft, and means for biasing said translatable shaft in an axial direction to urge said motion transfer means to said first position.
  • a second platen having a shaft rotatably mounted on said housing for feeding flexible sheet material past said print station;
  • said third gear means is rotatably mounted on said second platen shaft and has an outer gear driven by said output gear of said second stepping motor and a beveled inner gear surface;
  • said second motion transfer means comprises a gear plate translatably received on said second platen shaft adjacent said third gear and having a pair of oppositely disposed beveled gear surfaces joined by a pair of wall surfaces, said beveled gear surfaces of said second motion transfer means being engageable with said inner gear surface of said third gear means;
  • said fourth gear means is secured to said second platen shaft adjacent said second motion transfer means and is provided with a pair of arms extending towards said gear plate of said second motion transfer means and embracing said wall surfaces thereof.
  • said means for translating said second motion transfer means comprises a translatable shaft secured to said second motion transfer means and received in an open bore in the end of said second platen shaft, and means for biasing said last-named translatable shaft in an axial direction to urge said second motion transfer means to said alternate position.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Handling Of Sheets (AREA)
  • Advancing Webs (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Common Mechanisms (AREA)
US448870A 1974-03-07 1974-03-07 Variable displacement apparatus for platen and tractor feed Expired - Lifetime US3880016A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US448870A US3880016A (en) 1974-03-07 1974-03-07 Variable displacement apparatus for platen and tractor feed
DE2509838A DE2509838C2 (de) 1974-03-07 1975-03-06 Getriebe zum Drehen einer Schreibwalze
SE7502529A SE409188B (sv) 1974-03-07 1975-03-06 Drivanordning for en vals och en matningsenhet for arkmaterial
GB9403/75A GB1496416A (en) 1974-03-07 1975-03-06 Printing mechanism
CA221,427A CA1005834A (en) 1974-03-07 1975-03-06 Variable displacement apparatus for platen and tractor feed
NL7502753A NL7502753A (nl) 1974-03-07 1975-03-07 Met de hand bedienbare richtinrichting voor een blad papier.
FR7507314A FR2272841B1 (sv) 1974-03-07 1975-03-07
JP50027907A JPS50125820A (sv) 1974-03-07 1975-03-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US448870A US3880016A (en) 1974-03-07 1974-03-07 Variable displacement apparatus for platen and tractor feed

Publications (1)

Publication Number Publication Date
US3880016A true US3880016A (en) 1975-04-29

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Application Number Title Priority Date Filing Date
US448870A Expired - Lifetime US3880016A (en) 1974-03-07 1974-03-07 Variable displacement apparatus for platen and tractor feed

Country Status (8)

Country Link
US (1) US3880016A (sv)
JP (1) JPS50125820A (sv)
CA (1) CA1005834A (sv)
DE (1) DE2509838C2 (sv)
FR (1) FR2272841B1 (sv)
GB (1) GB1496416A (sv)
NL (1) NL7502753A (sv)
SE (1) SE409188B (sv)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2341439A1 (fr) * 1976-02-23 1977-09-16 Sycor Inc Imprimante equipee de modules interchangeables d'entrainement du papier
US4160606A (en) * 1974-09-27 1979-07-10 Honeywell Information Systems Italia Paper feed mechanism for multiple copy printer
EP0002796A1 (de) * 1977-12-27 1979-07-11 International Business Machines Corporation Papiertransportvorrichtung für den Transport von Einzel- als auch Endlosformularen in einem schreibenden Gerät
US4195940A (en) * 1976-07-26 1980-04-01 Siemens Aktiengesellschaft Line control for platen printing devices
US4247212A (en) * 1979-05-31 1981-01-27 Wang Laboratories, Inc. Printer flaten clutch
US4255063A (en) * 1977-07-04 1981-03-10 Ing. C. Olivetti & C., S.P.A. Electromagnetic line spacing device
US4269522A (en) * 1978-06-20 1981-05-26 Xerox Corporation Bi-directional record material feed apparatus
US4475677A (en) * 1982-04-20 1984-10-09 Albert Rutishauser Transport apparatus for conveying a perforated recording medium to a _platen or the like
US4618278A (en) * 1984-02-15 1986-10-21 Sharp Kabushiki Kaisha Paper feed control in a printer
US4699534A (en) * 1983-03-04 1987-10-13 Canon Kabushiki Kaisha Sheet advancing device
US4717274A (en) * 1982-12-09 1988-01-05 Canon Kabushiki Kaisha Printer
US4739316A (en) * 1983-04-26 1988-04-19 Sharp Kabushiki Kaisha Structure of portable electronic apparatus
EP0295172A2 (en) * 1987-05-30 1988-12-14 Copal Company Ltd. Printer paper feed apparatus
US4826335A (en) * 1982-12-07 1989-05-02 Canon Kabushiki Kaisha Recording apparatus having a rotatable cover including a guide for guiding a non-continuous record sheet to a recording head and having another guide for guiding a continuous record sheet having holes therein to the recording head
US4971466A (en) * 1983-05-24 1990-11-20 Canon Kabushiki Kaisha Printing apparatus having a rotatable member rotatable in incremental steps smaller than the pitch of a detent gear and including means for accurately retaining the rotatable member at a predetermined position when the detent mechanism is inoperable
US4976557A (en) * 1985-02-20 1990-12-11 Canon Kabushiki Kaisha Sheet conveying device with axially disengaged transmitter of restraining force
US5129748A (en) * 1989-11-13 1992-07-14 Eastman Kodak Company Compact printer having sheet and tractor media selections
US6398360B1 (en) * 2000-01-04 2002-06-04 International Business Machines Corporation Thermal printer using a split rotary platen to print on different widths of paper

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58541Y2 (ja) * 1979-04-11 1983-01-06 富士通株式会社 印字装置の紙送り機構
JPS5722083A (en) * 1980-07-10 1982-02-04 Serabisu Sa Platen knob device for typewriter
JPS57156355U (sv) * 1981-03-30 1982-10-01
SE440766B (sv) * 1981-10-09 1985-08-19 Facit Ab Pappersmatningsanordning
JPS6132777A (ja) * 1984-07-26 1986-02-15 Seikosha Co Ltd プリンタの紙送り装置
CN110769794B (zh) * 2017-05-05 2022-12-09 D·G·罗宾斯 用于轮椅的齿式离合器传动装置
CN111805451A (zh) * 2020-07-09 2020-10-23 苏州工业园区欣隆电热仪器有限公司 自动对位补正装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670861A (en) * 1970-09-10 1972-06-20 Extel Corp Carriage drive for high speed printer
US3766795A (en) * 1970-12-02 1973-10-23 Dutton Lainson Co Winch power module with gear disconnect

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE457899C (de) * 1924-06-04 1928-03-26 Mercedes Buero Maschinen Und W Geteilte Schreibwalze fuer Schreibmaschinen
US2171003A (en) * 1936-08-17 1939-08-29 Gilman Fanfold Corp Strip feeding and aligning mechanism
AT199956B (de) * 1956-12-19 1958-10-10 Vinzenz Ing Furlan Kupplung
GB949929A (en) * 1959-12-11 1964-02-19 Alacra Ltd Improvements in or relating to gear trains and an application thereof
JPS4410339Y1 (sv) * 1964-06-13 1969-04-25
JPS4310821Y1 (sv) * 1965-03-04 1968-05-11
US3587811A (en) * 1967-12-06 1971-06-28 Singer Co Platen power drive for line spacing,vertical tabulation and form-feed spacing
BE795861A (fr) * 1972-02-25 1973-08-23 Xerox Corp Systeme distributeur de papier pour machine a imprimer a grande vitesse
JPS5513917B2 (sv) * 1972-04-22 1980-04-12

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670861A (en) * 1970-09-10 1972-06-20 Extel Corp Carriage drive for high speed printer
US3766795A (en) * 1970-12-02 1973-10-23 Dutton Lainson Co Winch power module with gear disconnect

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4160606A (en) * 1974-09-27 1979-07-10 Honeywell Information Systems Italia Paper feed mechanism for multiple copy printer
FR2341439A1 (fr) * 1976-02-23 1977-09-16 Sycor Inc Imprimante equipee de modules interchangeables d'entrainement du papier
US4195940A (en) * 1976-07-26 1980-04-01 Siemens Aktiengesellschaft Line control for platen printing devices
US4255063A (en) * 1977-07-04 1981-03-10 Ing. C. Olivetti & C., S.P.A. Electromagnetic line spacing device
EP0002796A1 (de) * 1977-12-27 1979-07-11 International Business Machines Corporation Papiertransportvorrichtung für den Transport von Einzel- als auch Endlosformularen in einem schreibenden Gerät
US4269522A (en) * 1978-06-20 1981-05-26 Xerox Corporation Bi-directional record material feed apparatus
US4247212A (en) * 1979-05-31 1981-01-27 Wang Laboratories, Inc. Printer flaten clutch
US4475677A (en) * 1982-04-20 1984-10-09 Albert Rutishauser Transport apparatus for conveying a perforated recording medium to a _platen or the like
US4826335A (en) * 1982-12-07 1989-05-02 Canon Kabushiki Kaisha Recording apparatus having a rotatable cover including a guide for guiding a non-continuous record sheet to a recording head and having another guide for guiding a continuous record sheet having holes therein to the recording head
US4717274A (en) * 1982-12-09 1988-01-05 Canon Kabushiki Kaisha Printer
US4699534A (en) * 1983-03-04 1987-10-13 Canon Kabushiki Kaisha Sheet advancing device
US4739316A (en) * 1983-04-26 1988-04-19 Sharp Kabushiki Kaisha Structure of portable electronic apparatus
US4971466A (en) * 1983-05-24 1990-11-20 Canon Kabushiki Kaisha Printing apparatus having a rotatable member rotatable in incremental steps smaller than the pitch of a detent gear and including means for accurately retaining the rotatable member at a predetermined position when the detent mechanism is inoperable
US4618278A (en) * 1984-02-15 1986-10-21 Sharp Kabushiki Kaisha Paper feed control in a printer
US4976557A (en) * 1985-02-20 1990-12-11 Canon Kabushiki Kaisha Sheet conveying device with axially disengaged transmitter of restraining force
EP0295172A2 (en) * 1987-05-30 1988-12-14 Copal Company Ltd. Printer paper feed apparatus
EP0295172A3 (en) * 1987-05-30 1989-04-19 Copal Company Ltd. Printer paper feed apparatus
US4909497A (en) * 1987-05-30 1990-03-20 Copal Company Limited Printer paper feed apparatus
US5129748A (en) * 1989-11-13 1992-07-14 Eastman Kodak Company Compact printer having sheet and tractor media selections
US6398360B1 (en) * 2000-01-04 2002-06-04 International Business Machines Corporation Thermal printer using a split rotary platen to print on different widths of paper

Also Published As

Publication number Publication date
DE2509838A1 (de) 1975-09-18
FR2272841B1 (sv) 1982-09-24
JPS50125820A (sv) 1975-10-03
CA1005834A (en) 1977-02-22
GB1496416A (en) 1977-12-30
SE409188B (sv) 1979-08-06
FR2272841A1 (sv) 1975-12-26
NL7502753A (nl) 1975-09-09
DE2509838C2 (de) 1982-11-04
SE7502529L (sv) 1975-09-08

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