EP1186433B1 - Procédé d'impression de lettres utilisant une tête linéaire thermique - Google Patents

Procédé d'impression de lettres utilisant une tête linéaire thermique Download PDF

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Publication number
EP1186433B1
EP1186433B1 EP20000116970 EP00116970A EP1186433B1 EP 1186433 B1 EP1186433 B1 EP 1186433B1 EP 20000116970 EP20000116970 EP 20000116970 EP 00116970 A EP00116970 A EP 00116970A EP 1186433 B1 EP1186433 B1 EP 1186433B1
Authority
EP
European Patent Office
Prior art keywords
ribbon tape
velocity
thermal head
print object
feeding
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
EP20000116970
Other languages
German (de)
English (en)
Other versions
EP1186433A1 (fr
Inventor
Masuo Sogabe
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.)
Daisey Machinery Co Ltd
Original Assignee
Daisey Machinery Co 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 Daisey Machinery Co Ltd filed Critical Daisey Machinery Co Ltd
Priority to DE2000611076 priority Critical patent/DE60011076T2/de
Priority to EP20000116970 priority patent/EP1186433B1/fr
Publication of EP1186433A1 publication Critical patent/EP1186433A1/fr
Application granted granted Critical
Publication of EP1186433B1 publication Critical patent/EP1186433B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41J17/00—Mechanisms for manipulating page-width impression-transfer material, e.g. carbon paper
    • B41J17/02—Feeding mechanisms
    • B41J17/04—Feed dependent on the record-paper feed, e.g. both moved at the same time
    • 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
    • B41J33/36—Ribbon-feed devices or mechanisms with means for adjusting feeding rate
    • 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
    • B41J35/08—Ink-ribbon guides with tensioning arrangements

Definitions

  • the present invention relates to a line thermal head letter printing method of a synchronous type for making a letter printing by feeding a hot release type thermal transfer ribbon tape following a transfer velocity of a print object sheet and especially relates to a line thermal head letter printing method in which feeding and winding of the ribbon tape are improved.
  • a hot release type thermal transfer ribbon tape following a transfer velocity of a sheet as an object to be printed, such as a packaging material film, (herein referred to as "a print object sheet") and by supplying a line thermal head, such as that called a corner edge type or an end face type, which is pressed against the ribbon tape, with electricity.
  • US-A-5,908,251 discloses a printing system in which a two-way stepper motor is employed for feeding a ribbon tape.
  • EP-A-0 493 942 discloses a line thermal head letter printing method comprising steps of feeding a necessary amount of said ribbon tape at a velocity synchronized with a transfer velocity of said print object sheet and winding said ribbon tape via a friction transmission by a power rotating at a velocity higher than that of said print object sheet being transferred. Such a method is described in the preamble of claim 1.
  • the present invention provides a line thermal head letter printing method comprising steps of: feeding a necessary amount of the ribbon tape at a velocity synchronized with a transfer velocity of the print object sheet by using a stepping motor, and winding the ribbon tape via a friction transmission by a power rotating at a velocity higher than that of the print object sheet being transferred.
  • a clear and high quality printing can be done also on the print object sheet which is being transferred at a velocity higher than 10 inch/second or more with which there has been a problem.
  • FIG. 1 shows one example of a letter printing device for working the letter printing method of the present invention.
  • numeral 2 designates a print object sheet which is being transferred to a direction shown by arrow.
  • Numeral 4 designates a thermal transfer ribbon tape, which is fed from a ribbon tape master roll 6 to be wound around a ribbon tape winding roll 8 while being disposed on the print object sheet 2 on the way.
  • the ribbon tape winding roll 8 is rotated by a power transmitted from a power transmission mechanism, described later, via a friction transmission by a sliding clutch.
  • Numeral 10 designates a line thermal head and numeral 12 designates a platen unit comprising a plate or roller.
  • the platen unit 12 is disposed under the line thermal head 10, thereby the print object sheet 2 and the thermal transfer ribbon tape 4 are put between the line thermal head 10 and the platen unit 12 so that a letter printing may be done on the print object sheet 2.
  • Numeral 13 designates a sheet velocity detecting encoder for detecting a transfer velocity of the print object sheet 2.
  • Numeral 14 designates a rotary encoder and guide roller, which detects a feeding velocity of the ribbon tape and at the same time guides a feeding of the ribbon tape.
  • Numeral 16 designates a guide roller, which guides the feeding of the ribbon tape.
  • Numeral 18 designates a stepping motor, which rotates the ribbon tape master roll 6 to feed the ribbon tape in the amount needed for the printing.
  • a drive force of the stepping motor 18 is transmitted to the ribbon tape winding roll 8 via a belt 20, a transmission roll 22 and a one-way clutch gear 24 so as to drive the ribbon tape winding roll 8 rotationally.
  • the power transmission mechanism comprises the belt 20, the transmission roller 22 and the one-way clutch gear 24 and is constructed such that the ribbon tape winding roll 8 is rotated always in a tape winding direction even if the stepping motor 18 rotates in either direction so as.to remove a loosening of the ribbon tape 4.
  • a transmission ratio of the drive force which is transmitted from the stepping motor 18 to the ribbon tape winding roll 8 is so set that a stretching force acts always on the ribbon tape 4 as a diameter of the ribbon tape winding roll 8 changes.
  • the ribbon tape master roll 6 is driven by the stepping motor 18 so that the ribbon tape 4 is fed at a velocity equal to the transfer velocity of the print object sheet 2 and at the same time the power rotating at a velocity higher than the transfer velocity of the print object sheet 2 is transmitted to the ribbon tape winding roll 8 via the friction transmission by the sliding clutch so that the ribbon tape 4 is wound around the ribbon tape winding roll 8.
  • a tension acts always on the ribbon tape 4 so that there occurs no loosening of the ribbon tape hot release portion at the tip of the line thermal head 10 and the ribbon tape 4 may be wound around the ribbon tape winding roll 8 always with a good condition of the hot release.
  • a clear letter printing can be done using the hot release type ribbon tape.
  • the ribbon tape 4 receives a stretching force acting toward the ribbon tape winding roll 8, as there is acting the torque of the stepping motor 18 on the ribbon tape 4, the ribbon tape 4 is in no case fed more than needed beyond the velocity fed by the drive mechanism using the stepping motor 18.
  • the ribbon tape 4 when the ribbon tape 4 is to stand still, as a stationary torque can be obtained by using the stepping motor 18, the ribbon tape 4 is in no case dragged by a contact resistance or an electrostatic force with the print object sheet 2.
  • the feeding amount of the ribbon tape 4 is monitored by the rotary encoder and guide roller 14, an amount of the ribbon tape 4 fed during the time of acceleration or deceleration in the process to follow the velocity of the print object sheet 2 can be fed back to be rewound around the ribbon tape master roll 6 only by rotating the stepping motor 18 reversely, hence a consumption of the ribbon tape 4 can be saved.
  • the feeding and the winding of the ribbon tape 4 are done both by the roll drive, even when the roll of the ribbon tape is made with the inked face being on the outer side, the inked face of the ribbon tape is in no case damaged by a load while moving on a transfer path. Also, as there is no press feed mechanism using a drive roller, there are greatly reduced a dirt of a feed roller and a falling of sticking matters and an excellent print quality can be maintained.
  • the construction may be made such that the ribbon tape master roll 6 and the ribbon tape winding roll 8 are driven separately by two stepping motors 18, 26, as shown in Fig.2.
  • the ribbon tape winding roll 8 is driven by the stepping motor 26 via a sliding clutch.
  • the necessary amount of the ribbon tape is fed at the velocity synchronized with the transfer velocity of the print object sheet by using the stepping motor and this ribbon tape is wound via the friction transmission by the power rotating at the velocity higher than that of the transferring print object sheet, thereby the ribbon tape is stretched continuously via the friction transmission by the drive force of the velocity higher than that of the print object sheet so that there occurs no loosening of the ribbon tape hot release portion at the tip of the head and the hot release of the ribbon tape takes place always in a good condition.
  • a clear and high quality printing can be done also on the print object sheet which is being transferred at the velocity higher than 10 inch/second or more with which there has been a problem.

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  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Electronic Switches (AREA)

Claims (2)

  1. Procédé de typographie à tête thermique ligne par ligne pour imprimer des lettres sur une feuille objet d'impression qui est en cours de transfert, à l'aide d'une tête thermique ligne par ligne et d'une bande ruban à transfert thermique du type declencheur, comprenant les étapes consistant délivrer une quantité nécessaire de ladite bande ruban (4) à une vitesse synchronisée avec une vitesse de transfert de ladite feuille objet d'impression (2), et à enrouler ladite bande ruban (4) via une transmission par friction par une énergie tournant à une vitesse supérieure à celle de ladite feuille objet d'impression (2) qui est en cours de transfert, caractérisé en ce que ladite étape de délivrance d'une quantité nécessaire de ladite bande ruban (4) est effectuée en utilisant un moteur pas à pas (18) et, pendant l'étape d'enroulement de ladite bande ruban (4), ladite transmission par friction est effectuée toujours dans une direction par une transmission d'énergie via un premier pignon unidirectionnel (24-1) pour transmettre une rotation dudit moteur pas à pas (18) via un premier rouleau de transmission (22-1) et par une transmission d'énergie via un deuxième pignon unidirectionnel (24-2) mis en rotation par ledit premier rouleau de transmission (22-1) via un deuxième rouleau de transmission (22-2).
  2. Procédé de typographie à tête thermique ligne par ligne selon la revendication 1, caractérisé en ce que la délivrance et l'enroulement de ladite bande ruban (4) sont tous deux effectués par un entraínement par cylindre et en ce qu'une quantité de délivrance de ladite bande ruban (4) est détectée par un codeur rotatif (14).
EP20000116970 2000-08-07 2000-08-07 Procédé d'impression de lettres utilisant une tête linéaire thermique Expired - Lifetime EP1186433B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE2000611076 DE60011076T2 (de) 2000-08-07 2000-08-07 Verfahren zum Buchstabendruck unter Verwendung eines thermischen Linien-Druckkopfs
EP20000116970 EP1186433B1 (fr) 2000-08-07 2000-08-07 Procédé d'impression de lettres utilisant une tête linéaire thermique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20000116970 EP1186433B1 (fr) 2000-08-07 2000-08-07 Procédé d'impression de lettres utilisant une tête linéaire thermique

Publications (2)

Publication Number Publication Date
EP1186433A1 EP1186433A1 (fr) 2002-03-13
EP1186433B1 true EP1186433B1 (fr) 2004-05-26

Family

ID=8169463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000116970 Expired - Lifetime EP1186433B1 (fr) 2000-08-07 2000-08-07 Procédé d'impression de lettres utilisant une tête linéaire thermique

Country Status (2)

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EP (1) EP1186433B1 (fr)
DE (1) DE60011076T2 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4104965A (en) * 1975-10-16 1978-08-08 E.D.M. Co., Ltd. Clutch for permitting a driven member to run at different speed from a drive member
GB2251217B (en) * 1990-12-31 1994-10-05 Alcatel Business Systems Ink ribbon feed
GB9410273D0 (en) * 1994-05-20 1994-07-13 Prestek Ltd Printing apparatus
US5593238A (en) * 1994-08-22 1997-01-14 Intermec Corporation Method and apparatus for controlling transport of thermal transfer ribbon
EP0802117B1 (fr) * 1996-04-19 2001-03-28 Daisey Kikai Co., Ltd. Tête imprimante linéaire thermique
DE69704546T2 (de) * 1997-02-26 2001-08-09 Itw Ltd., Addlestone Drucker zum Bedrucken von einem bandförmigen Aufzeichnungsträger
ES2151875T1 (es) * 1998-01-12 2001-01-16 Easyprint Aps Procedimiento de impresion termica y una impresora termica.

Also Published As

Publication number Publication date
EP1186433A1 (fr) 2002-03-13
DE60011076D1 (de) 2004-07-01
DE60011076T2 (de) 2005-05-25

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