EP0126203A2 - Dispositif d'alimentation de ruban à transfert thermique pour une imprimante - Google Patents

Dispositif d'alimentation de ruban à transfert thermique pour une imprimante Download PDF

Info

Publication number
EP0126203A2
EP0126203A2 EP84100625A EP84100625A EP0126203A2 EP 0126203 A2 EP0126203 A2 EP 0126203A2 EP 84100625 A EP84100625 A EP 84100625A EP 84100625 A EP84100625 A EP 84100625A EP 0126203 A2 EP0126203 A2 EP 0126203A2
Authority
EP
European Patent Office
Prior art keywords
carriage
heat transfer
film
printer
driving
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
EP84100625A
Other languages
German (de)
English (en)
Other versions
EP0126203B1 (fr
EP0126203A3 (en
Inventor
Gen Seki
Takeshi Tokunaga
Tohei Kawakami
Syozi Yokoyama
Syozo Suzuki
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP0126203A2 publication Critical patent/EP0126203A2/fr
Publication of EP0126203A3 publication Critical patent/EP0126203A3/en
Application granted granted Critical
Publication of EP0126203B1 publication Critical patent/EP0126203B1/fr
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
    • B41J33/00—Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
    • B41J33/14—Ribbon-feed devices or mechanisms
    • B41J33/38—Slow, e.g. "creep", feed mechanisms
    • B41J33/388—Slow, e.g. "creep", feed mechanisms the ribbon being fed only when type impression takes place
    • 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
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/325—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads by selective transfer of ink from ink carrier, e.g. from ink ribbon or sheet
    • 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
    • B41J33/00—Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
    • B41J33/14—Ribbon-feed devices or mechanisms
    • B41J33/38—Slow, e.g. "creep", feed mechanisms

Definitions

  • the present invention relates to an improvement in a printer of the type which makes use of a heat transfer film.
  • a printer having a carriage adapted to be moved reciprocatingly, a thermal head mounted on the carriage, a heat transfer film on the carriage, a driving belt for reciprocatingly driving the carriage, two pulleys between which the driving belt is stretched, and a film roll-up mechanism for rolling up the film after use, wherein the improvement comprises that the carriage is fixed to the driving belt at one side of a line interconnecting the pulleys while the film roll-up mechanism is engaged to the belt at the other side of the line, and driving means is provided for driving one of the pulleys.
  • This printer has a highly simplified construction because the reciprocatory driving of the carriage and the rolling up of the heat transfer film after use are conducted by a common driving mechanism.
  • the printer of the invention has a housing constituted by an upper case 1 and a lower case 2.
  • the upper case 1 has a lid 3 covering the mechanical portion 7 of the printer.
  • a paper dis - charging portion is constituted by a platen 4 and rollers 5 associated with the platen 4.
  • the mechanical portion 7 of the printer includes various machine parts such as shafts 8 and 9, gear 10 and the platen 4 provided with a platen knob 11.
  • a carriage 12 shown in Fig. 4 is supported by the shafts 8 and 9 for horizontal sliding movement along these shafts.
  • a thermal head 14 is mounted on the carriage together with a cassette portion accomodating a heat transfer film.
  • the carriage 12 is fixed to one side of a timing belt, and is adapted to be moved horizontally by means of the timing belt which is stretched between a pulley 17 mounted on the end of the shaft of a pulse motor 16 and an idle pulley 18 of a belt stretching mechanism 19.
  • the other side of the timing belt 15 is utilized for rotating the heat transfer film.
  • the platen 4 is adapted to be rotated by a second pulse motor 20 through a gear 10.
  • the platen 14 is also rotatable by manual through the platen knob 11 independently of the motor 20.
  • a reference numeral 21 designates a release lever which is adapted to release the pressing force exerted by the pressing rollers on the lower side of the platen 4.
  • a reference numeral 23 designates a separator having functions such as the separation of the sheets continuously fed to and discharged from the printer, holding of the single sheets and so on.
  • the electric power supply to the electric parts such as the thermal head carried by the carriage 12 is conducted through a flat cable 24.
  • Reference numerals 25 and 26 denote, respectively, a transformer and a power switch.
  • Fig. 2 shows the construction of the frame portion.
  • Numerals 30 and 31 denote side plates having an identical construction.
  • a bottom plate 32 is provided at its both ends with projections 33, 34 and 35. These projections are adapted to be fitted in corresponding apertures formed in the side plates 30 and 31 and caulked to these side plates to thereby form a frame.
  • the shaft 8 is held at its one end by an E-ring 36 and a fastener 37, and is incorporated in a frame together with a carriage 12.
  • the shaft 9 is held on the side plates 30 and 31 by means of an E-ring 36' and a fastener 37'.
  • the pulley 18 is rotatably held by the belt stretching mechanism 19, which in turn is held by means of a belt stretcher mounting screw 38, retaining hole 39 and a biasing spring 40.
  • the carriage feeding pulse motor 16 is mounted on the motor base 45 through the intermediary of a vibration-proof rubber 41.
  • the paper feeding pulse motor 20 is held by the motor base 45 together with a drive gear 42, intermediate gear 43 and a shaft 44.
  • the motor base is fixed to the side plate 31 by means of screws.
  • the motors and the associated parts in combination constitute a driving unit.
  • a transformer support 46 is secured also to the side plate 31 by means of screws.
  • Fig. 4 shows the portion around the carriage 12 of the printer in accordance with the invention.
  • the carriage 12 carries a cassette 13 loaded with a heat transfer film 50 to which a thermally-fusible ink has been applied.
  • the thermal head 14 is rotatably held around the shaft 51 through the intermediary of the supporting plate 52. The arrangement is such that the thermal head presses the platen 4 through the medium of the heat transfer film 50 and a print paper 53 so that the resistor mounted on the head 14 produces heat to fuse the ink on the heat transfer film 50 to thereby effect a printing on the print paper 53.
  • the movement of the timing belt 15 causes a rotation of a pulley 55 which is provided at its one end with a gear 54.
  • the timing belt 15 drives at its reverse side a pressing roller 56.
  • a lever 57 provided at its one end with a gear 59 is rotated through frictional engagement with a corrugated washer 58, and a gear 60 is rotated by a gear 54 through the intermediary of a gear 54 to thereby roll up the heat transfer film 50.
  • a control board unit 61 is held by the lower case 2 and is extractable rearwardly.
  • the copy paper 53 is fed by the frictional engagement between the pressing rollers 62, 62' and the platen 4. These pressing rollers 62, 62 1 are held resiliently by a guide portion 64 through shafts 63, 63 1 , and are fixed to a rotary shaft 65.
  • a reference numeral 66 designates a guide for the copy paper 53 and is adapted to prevent involvement of the heat transfer film 50.
  • Fig. 5 illustrates the operation of the carriage 12.
  • the arrangement is such that, as the pulley 17 rotates, the belt 15 runs to make the carriage 12 run, while rotating the pulleys 55 and 66.
  • a solenoid 68 is energized to attract its plunger 69 from the position A' (broken line) to the position A (full line). Consequently, the head pressing lever 70 is rotated to push the head 14 through a retaining member 71, spring 72 and a pressing lever 73.
  • a reference numeral 74 designates a transmission type photosensor adapted to detect presence or absence of the heat transfer film 50 in the cassette 13.
  • Figs. 6 and 7 show the cassette 13 in section and in plan, respectively.
  • An idle roller 81 is resiliently pressed by a spring 82 onto a pinch roller 80 fixed to one end of the shaft of the gear 60.
  • the pinch roller 80 cooperate with the idle roller 81 to take-up the heat transfer film 50.
  • a retaining portion 89 on the shaft end of the roller 56 engages with the core 76 to roll up the film thus taken up.
  • An idle core 75 is adapted to be driven by the film which runs along the pinch rollers 78, 78', 79 and 79'.
  • the core 76 is adapted to be rotated only in the direction for rolling up the film 50, through the rotation of the pulley 55 and the pulley 56.
  • the torque of the roller 56 rotates the shaft 86 through the intermediary of the spring 84 and the friction plate 85.
  • the shaft 86 is provided with a ratchet 87 having teeth 87' which engages with an upper lid 88 of the carriage to allow the shaft 86 to rotate only in one direction. Therefore, the shaft 86 rotates only when the core 76 rotates clockwisely as viewed in Fig. 7, so that the film 50 can be rolled up on the core 76.
  • the arrangement is such that the film 50 can be fed when the head 14 is under the pressure, i.e. when the solenoid 68 is attracting its plunger as shown in Fig. 5A.
  • Figs. 10 and 11 show how the pressing rollers 62, 62' engage with the guide portion 64. It will be seen that the shafts 63 and 63' are retained at their both ends with fasteners 90.
  • control board unit 61 operates in accordance with the instructions given by the host computer, and the carriage motor 16 and the solenoid 68 are energized. Consequently, the plunger 69 of the solenoid is moved from the position shown by broken line in Fig. 5 to a position shown by full line in the same Figure, so that the head pressing lever 70 is rotated. Consequently, the head 14 is pressed through the retaining piece 71, spring 72 and the pressing lever 73, to thereby press the heat transfer film 50 to the platen 4 through the intermediary of the copy paper 60.
  • the electric power is supplied to the head 14 and also to the carriage driving motor 16 so that the carriage 12 is driven through the belt 15.
  • the thermal head 14 produces heat to melt the pigment ink on the surface of the heat transfer film 50 to thereby commence the printing on the print paper 53 through the transfer of the ink.
  • the heat transfer film 50 usually has a base made from a polyester film, which is adjacent to the head 14, and a pigment ink is applied to one side of the film, which is adjacent to the copy paper.
  • the head makes the film contact with the copy paper.
  • a wear resistant layer of a material such as a nitrided tantalum is formed on the head surface by spattering to provide a smooth surface. Therefore, the coefficient of friction p between the copy paper 53 and the heat transfer film 50 is much greater than the coefficient of friction ⁇ ' between the heat transfer film 50 and the thermal head 14.
  • the head 14 moves while pressing the platen 4, the head 14 slides on the surface of the heat transfer film 50 without causing relative movement between the copy paper 53 and the heat transfer film 50. Consequently, the core 75 is rotated so that the heat transfer film 50 is pulled out by a length l' equal to the amount t of movement of the head 14 from the position A to the position B.
  • the roller 56 is rotated by the running of the belt 15 so that the shaft 86 is rotated through the friction plate 85 and the ratchet 87 to frictionally drive the core 76 only in one direction. Furthermore, the operation of the solenoid 68 causes the lever 57 to rotate the intermediate gear 60, so that the lever 57 and the pressing lever 70 are disengaged from each other to cause a rotation of the roller 80. Consequently, the roller 80 takes up the film 50 by an amount equal to that pulled out from the core 75, and the taken-up film 50 is rolled up by the core 76.
  • the transfer film 50 is fed only when the carriage 12 is running and the solenoid 68 is energized so that the new portion of the heat transfer film 50 is used and fed only during the printing which is conducted by the head 14 pressed against the platen 4.
  • the running belt is stretched between two pulleys.
  • the carriage is fixed to the belt at one side of the line interconnecting two pulleys, while the film roll-up mechanism is engaged to the belt at the other side of the line.
  • both of the carriage and the film roll-up mechanism are driven by a common driving source. Consequently, the construction of the printer as a whole is very much simplified.

Landscapes

  • Electronic Switches (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Common Mechanisms (AREA)
EP19840100625 1983-01-21 1984-01-20 Dispositif d'alimentation de ruban à transfert thermique pour une imprimante Expired EP0126203B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8892/83 1983-01-21
JP58008892A JPS59135181A (ja) 1983-01-21 1983-01-21 印刷装置

Publications (3)

Publication Number Publication Date
EP0126203A2 true EP0126203A2 (fr) 1984-11-28
EP0126203A3 EP0126203A3 (en) 1985-07-31
EP0126203B1 EP0126203B1 (fr) 1987-04-22

Family

ID=11705323

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840100625 Expired EP0126203B1 (fr) 1983-01-21 1984-01-20 Dispositif d'alimentation de ruban à transfert thermique pour une imprimante

Country Status (3)

Country Link
EP (1) EP0126203B1 (fr)
JP (1) JPS59135181A (fr)
DE (1) DE3463236D1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3440690A1 (de) * 1983-11-07 1985-05-15 Canon K.K., Tokio/Tokyo Druckvorrichtung mit farbbandkassette
EP0156610A2 (fr) * 1984-03-19 1985-10-02 Fujitsu Limited Imprimante thermique par transfert d'encre
GB2221653A (en) * 1988-07-11 1990-02-14 Alps Electric Co Ltd Ribbon take-up devices for selective printers having ink-ribbon-cassettes
US4955738A (en) * 1983-07-20 1990-09-11 Canon Kabushiki Kaisha Printer with disengageable ribbon feed
US5030967A (en) * 1988-07-11 1991-07-09 Alps Electric Co., Ltd. Constant tension device for a thermal transfer printer
US5376951A (en) * 1989-06-07 1994-12-27 Alps Electric Co., Ltd. Thermal transfer printer and ribbon cassette for use in the same
US5593237A (en) * 1983-11-07 1997-01-14 Canon Kabushiki Kaisha Printing apparatus and ink ribbon cassette therefor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62288080A (ja) * 1986-06-06 1987-12-14 Mitsubishi Paper Mills Ltd 熱転写インクフイルム
JP2598261B2 (ja) * 1987-03-25 1997-04-09 大日本印刷株式会社 熱転写方法、被熱転写シート及び熱転写シート

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855448A (en) * 1972-03-27 1974-12-17 Canon Kk Recording apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54116250A (en) * 1978-08-28 1979-09-10 Canon Inc Recording apparatus
JPS5662184A (en) * 1979-10-26 1981-05-27 Canon Inc Printer
JPS5718274A (en) * 1980-07-04 1982-01-30 Canon Inc Printer
JPS5714059A (en) * 1980-06-30 1982-01-25 Canon Inc Printer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855448A (en) * 1972-03-27 1974-12-17 Canon Kk Recording apparatus

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4955738A (en) * 1983-07-20 1990-09-11 Canon Kabushiki Kaisha Printer with disengageable ribbon feed
DE3440690A1 (de) * 1983-11-07 1985-05-15 Canon K.K., Tokio/Tokyo Druckvorrichtung mit farbbandkassette
US5593237A (en) * 1983-11-07 1997-01-14 Canon Kabushiki Kaisha Printing apparatus and ink ribbon cassette therefor
EP0156610A2 (fr) * 1984-03-19 1985-10-02 Fujitsu Limited Imprimante thermique par transfert d'encre
EP0156610A3 (en) * 1984-03-19 1987-08-19 Fujitsu Limited Ink-transfer thermal printer
GB2221653A (en) * 1988-07-11 1990-02-14 Alps Electric Co Ltd Ribbon take-up devices for selective printers having ink-ribbon-cassettes
US5030967A (en) * 1988-07-11 1991-07-09 Alps Electric Co., Ltd. Constant tension device for a thermal transfer printer
GB2221653B (en) * 1988-07-11 1992-08-05 Alps Electric Co Ltd Thermal transfer printers
US5376951A (en) * 1989-06-07 1994-12-27 Alps Electric Co., Ltd. Thermal transfer printer and ribbon cassette for use in the same
US5476330A (en) * 1989-06-07 1995-12-19 Alps Electric Co., Ltd. Ink ribbon cassette for thermal transfer printer

Also Published As

Publication number Publication date
EP0126203B1 (fr) 1987-04-22
JPS59135181A (ja) 1984-08-03
DE3463236D1 (en) 1987-05-27
EP0126203A3 (en) 1985-07-31

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