EP0013292A2 - Papierführungsblech mit eingebauter Farbbandführung für einen Anschlagdrucker - Google Patents

Papierführungsblech mit eingebauter Farbbandführung für einen Anschlagdrucker Download PDF

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Publication number
EP0013292A2
EP0013292A2 EP79103694A EP79103694A EP0013292A2 EP 0013292 A2 EP0013292 A2 EP 0013292A2 EP 79103694 A EP79103694 A EP 79103694A EP 79103694 A EP79103694 A EP 79103694A EP 0013292 A2 EP0013292 A2 EP 0013292A2
Authority
EP
European Patent Office
Prior art keywords
screen
ribbon
printing
plate
window
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.)
Granted
Application number
EP79103694A
Other languages
English (en)
French (fr)
Other versions
EP0013292A3 (de
EP0013292B1 (de
Inventor
John Daniel Bemis
Willie Goff Jr.
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
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0013292A2 publication Critical patent/EP0013292A2/de
Publication of EP0013292A3 publication Critical patent/EP0013292A3/de
Application granted granted Critical
Publication of EP0013292B1 publication Critical patent/EP0013292B1/de
Expired legal-status Critical Current

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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
    • B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
    • B41J35/04—Ink-ribbon guides
    • B41J35/06—Ink-ribbon guides stationary
    • 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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/14—Aprons or guides for the printing section
    • B41J13/18—Aprons or guides for the printing section concentric with roller platen
    • 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
    • B41J35/36—Alarms, indicators, or feed disabling devices responsive to ink ribbon breakage or exhaustion

Definitions

  • the present invention relates to cylindrical platen impact printers and, more particularly, to a paper guide screen device for these printers.
  • impact printers with a cylindrical platen are equipped with a paper guide screen to keep the printing sheet pressed against the platen.
  • these screens have an internal surface whose curvature corresponds essentially to the curvature of the plate, and are mounted adjacent to the plate but at a certain distance from it so that a printing sheet can be introduced between screen and deck.
  • the screen naturally presents a window through which a character-carrying element can pass to ensure the printing of the sheet.
  • this impact printing is ensured by the displacement of the printing ribbon on a path passing between the screen and the character-carrying element which can be for example a disc or printing wheel having tabs radial with the print characters at their ends.
  • an impact means such as a hammer or the like, applies the selected radial tongue against the ribbon to drive it through the window in the screen and strike the selected character against the sheet of paper or other similar printing medium.
  • the adjustments in translation of the screen on the X and Y axes may require fine adjustments of the trajectory followed by the ribbon on these X and Y axes as well as corresponding settings of a particular end of ribbon detection means associated with the ribbon.
  • the device according to the present invention makes it possible to solve the tolerance problems described above and relating to the ribbons and the screens.
  • a main object of the present invention is to provide means making it possible to quickly and easily adjust the positions of the tape as a function of the positions of the screen, as well as to adjust the position of the end of tape detection means in function of the ribbon and screen positions.
  • Another object of the present invention is to provide a means making it possible to temporarily remove the screen from its operating position to clean it and to replace it without having to readjust the positions of the tape guide and of the end detection means. of ribbon.
  • the screen of the printer comprises ribbon guiding means, guiding said ribbon along the surface of the screen opposite the surface which is in contact with the printing sheet.
  • the ribbon guides of the screen ensure the passage of the ribbon over the window provided in the screen to allow the ribbon to be driven against the sheet during an impact printing operation.
  • the screen further comprises means for detecting the end of the ribbon.
  • the end of ribbon detection means are adjusted in a corresponding manner. No independent adjustment of the ribbon guides or of the end of ribbon detection means is necessary with the device of the present invention.
  • the screen in order to allow easy access to the curved side of the screen in contact with the printing sheet, for cleaning it, the screen is mounted so that it can pivot to move away from the plate, then pivot again in the other direction to be brought back to the operating position. operation. Since the ribbon guides and the end of ribbon detection means are integral with the screen, they pivot with the screen and no independent adjustment of these units is necessary, which allows even faster cleaning of the screen. the screen.
  • FIG. 1 also represents, in addition to the device of the present invention, the parts of the printer necessary for the explanation of the invention.
  • the screen 10 maintains the sheet of paper 11 in position relative to the plate 12.
  • the assembly shown further comprises a conventional printing wheel 13 whose representation is only partial.
  • This printing wheel 13 includes radial character-carrying tongues 14 rotated in a conventional manner to be placed in the printing position.
  • the assembly also includes an impact means 15 partially shown and causing the selected tab and the ribbon 16 through the window 17 provided in the screen to ensure the printing operation.
  • the print wheel and the screen are driven laterally, in a conventional manner, on the sheet of paper and are mounted on a carriage not shown and controlled by a conventional printer exhaust mechanism, also not shown. During a printing operation, the window 17 and the screen 10 are in the printing position at a certain point on the sheet 11.
  • the screen comprises integral ribbon guides comprising uprights 18 which define the lowest trajectory of the ribbon during of its displacement as well as two pairs of curved rods 19-19 'and 20-20' emerging vertically upwards from the uprights 18 to retain the ribbon on its path.
  • the rods 19 and 20 are closer to the print wheel than the rods 19 'and 20' so that the ribbon makes a slight angle with the screen 10 when it arrives on the guides and leaves them.
  • the two pairs of rods are part of the end of ribbon detection device.
  • the rods are electrically conductive and respectively connected via corresponding pairs of lines 22-22 'and 23-23' to respective end-of-tape detection circuits 24 and 25.
  • These circuits 24 and 25 can be conventional circuits any detecting the looping of a circuit and delivering an appropriate signal.
  • the end of the ribbon is detected by a ribbon end tab 21 of electrically conductive material, which is shown in the operating position. operation with respect to rods 20 and 20 '. Since these rods are separate from each other, the electrical circuit is normally open during printer operation. At the end of the ribbon, when the conductive tab overlaps the rods 20 and 20 ′ as shown in FIG. 1, the circuit is closed and the end of ribbon detection circuit delivers the appropriate signal.
  • the two sets of rods 19-19 'and 20-20' and their associated end-of-ribbon detection circuits 24 and 25 will respectively detect one or the other of the conductive end-of-ribbon tabs mounted at the two ends of the ribbon, according to the direction of movement thereof.
  • the screen 10 can be readjusted relative to the plate 12 and to the sheet 11. It can be seen that the screen is fixed to a plate 26 by means of two screws 27 and 28 passing through buttonholes 29 and 30 to be screwed into the plate 26. Since the buttonholes 29 and 30 are oriented vertically, the screen can be moved from bottom to top and vice versa along the length of these buttonholes in order to adjust the position of the front screen tighten the screws 27 and 28 and fix it to the plate 26.
  • the plate 26 extends over the entire length of the screen and has at each of its ends an arm 31 mounted to pivot on an axis 32 carried by a support 33 secured to the base 34.
  • the base is fixed to the carriage frame 35 by four screws 36 passing through oversized holes 37 made in the base 34.
  • the base 34 and thus the 'screen carried by said base can be translated in all directions, in the plane of the chassis 35, as shown by the arrows associated with the screws 36 in FIGS. 1 and 2.
  • the ribbon guides and the end of ribbon detection means constituted by the pairs of rods 19-19 'and 20-20' are secured to the screen, they will move with it and no particular adjustment of these items will only be required.
  • the device of the present invention allows the screen 10 to be adjusted in rotation relative to the sheet 11 and to the plate 12.
  • springs 38 exert restoring forces on the arms 31 of the plate 26 in order to pivot the screen around the axes 32 and to recall it towards the sheet 12 and the plate 11.
  • Adjusting stop screws 39 screwed into lugs 40 integral with the arms 31, and resting on lugs corresponding 41 secured to the supports 33, can be screwed or unscrewed to drive the screen 10 in rotation about the axes 32 and thus adjust the distance separating it from the sheet 11 and the plate 12.
  • the screen 10 For cleaning, the screen 10, with its detection means and its ribbon guides can be pivoted on the axes 32 and away from the sheet 11 and the plate 12, by applying and maintaining sufficient manual force to overcome the return forces exerted by the springs 38.
  • the screen 10 When the cleaning is complete, the screen 10 is returned to its operating position relative to the sheet 11 and the plate 12.
  • the position of the ribbon guides and the end of tape detection means which are integral with the screen remains unchanged with respect to the screen during the movement of the latter.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Handling Of Sheets (AREA)
  • Handling Of Cut Paper (AREA)
EP79103694A 1978-11-06 1979-09-28 Papierführungsblech mit eingebauter Farbbandführung für einen Anschlagdrucker Expired EP0013292B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US958276 1978-11-06
US05/958,276 US4212552A (en) 1978-11-06 1978-11-06 Impact printer cardholder with integral ribbon guide and end of ribbon sensor

Publications (3)

Publication Number Publication Date
EP0013292A2 true EP0013292A2 (de) 1980-07-23
EP0013292A3 EP0013292A3 (de) 1981-01-07
EP0013292B1 EP0013292B1 (de) 1984-02-15

Family

ID=25500808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79103694A Expired EP0013292B1 (de) 1978-11-06 1979-09-28 Papierführungsblech mit eingebauter Farbbandführung für einen Anschlagdrucker

Country Status (6)

Country Link
US (1) US4212552A (de)
EP (1) EP0013292B1 (de)
JP (1) JPS5563289A (de)
CA (1) CA1128451A (de)
DE (1) DE2966670D1 (de)
IT (1) IT1162793B (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6054186B2 (ja) * 1978-09-18 1985-11-29 株式会社リコー 印字装置
CH627687A5 (fr) * 1978-12-20 1982-01-29 Hermes Precisa International Dispositif de mise en place et de fixation d'un disque d'impression.
JPS5627942U (de) * 1979-08-10 1981-03-16
US4326815A (en) * 1980-01-21 1982-04-27 Ziyad Incorporated Paper feeding apparatus and method for printing apparatus
US4375339A (en) * 1980-12-01 1983-03-01 International Business Machines Corporation Electrically conductive ribbon break detector for printers
JPS57148682A (en) * 1981-03-09 1982-09-14 Canon Inc Ink ribbon delivery mechanism
DE3214633C2 (de) * 1982-04-20 1986-10-30 Nixdorf Computer Ag, 4790 Paderborn Einrichtung zur Führung eines auswechselbaren Farbbandes in einem Drucker
US4685818A (en) * 1985-09-16 1987-08-11 Printronix, Inc. Ribbon fault detection system
DE3700636C1 (de) * 1987-01-12 1988-05-26 Olympia Aeg Farbbandeinrichtung in Schreib- oder aehnlichen Bueromaschinen
DE3819782A1 (de) * 1988-06-10 1989-12-14 Triumph Adler Ag Schreibmaschine, drucker oder dergleichen und farbbandkassette hierfuer
US5098208A (en) * 1990-01-12 1992-03-24 Smith Corona Corporation Ribbon cassette with integral paper guide
US5074689A (en) * 1990-01-12 1991-12-24 Smith Corona Corporation Ribbon cassette with integral paper guide
US6503007B1 (en) 2001-07-27 2003-01-07 Genicom, Llc Printer ribbon motion detection system
US7466328B2 (en) * 2004-11-16 2008-12-16 Polaroid Corporation Thermal printing device with an improved image registration, method for printing an image using said printing device and system for printing an image

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3102699A (en) * 1960-11-07 1963-09-03 Proctor Dictating Machine Corp Improved drive for sound recording and reproducing apparatus
US3747734A (en) * 1971-12-17 1973-07-24 J Hagood Error correction device
FR2342163A1 (fr) * 1976-02-28 1977-09-23 Ncr Co Imprimantes

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1174555A (en) * 1915-11-27 1916-03-07 Underwood Typewriter Co Type-writing machine.
US1679845A (en) * 1924-08-16 1928-08-07 Underwood Elliott Fisher Co Typewriting machine
US2044072A (en) * 1933-02-27 1936-06-16 Remingten Typewriter Company Typewriting machine
US2331331A (en) * 1940-12-27 1943-10-12 Allen Wales Adding Machine Cor Printing mechanism
US2345557A (en) * 1943-02-12 1944-04-04 Harmon P Elliott Apparatus for forming characters on stencils
GB706172A (en) * 1950-02-25 1954-03-24 Ronald Max Ford Improvements relating to tape feeding appliances for typewriting machines
GB717752A (en) * 1951-02-14 1954-11-03 Frank R Ford Ltd Improvements relating to typewriting machines
US2821284A (en) * 1954-03-15 1958-01-28 Lamson Paragon Ltd Carbon transfer material with alarm means for an imprinting machine
US3404628A (en) * 1966-07-11 1968-10-08 Alves Photo Service Inc Automatic marking device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3102699A (en) * 1960-11-07 1963-09-03 Proctor Dictating Machine Corp Improved drive for sound recording and reproducing apparatus
US3747734A (en) * 1971-12-17 1973-07-24 J Hagood Error correction device
FR2342163A1 (fr) * 1976-02-28 1977-09-23 Ncr Co Imprimantes

Also Published As

Publication number Publication date
CA1128451A (en) 1982-07-27
US4212552A (en) 1980-07-15
DE2966670D1 (en) 1984-03-22
EP0013292A3 (de) 1981-01-07
EP0013292B1 (de) 1984-02-15
JPS5563289A (en) 1980-05-13
JPS5730393B2 (de) 1982-06-28
IT1162793B (it) 1987-04-01
IT7926954A0 (it) 1979-10-31

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