EP0195210A2 - Imprimante à transmission de chaleur - Google Patents

Imprimante à transmission de chaleur Download PDF

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Publication number
EP0195210A2
EP0195210A2 EP86101288A EP86101288A EP0195210A2 EP 0195210 A2 EP0195210 A2 EP 0195210A2 EP 86101288 A EP86101288 A EP 86101288A EP 86101288 A EP86101288 A EP 86101288A EP 0195210 A2 EP0195210 A2 EP 0195210A2
Authority
EP
European Patent Office
Prior art keywords
thermal head
recording medium
transfer printing
dye carrier
printing
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Withdrawn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
EP86101288A
Other languages
German (de)
English (en)
Other versions
EP0195210A3 (fr
Inventor
Wolfgang Hendrischk
Rolf Röschlein
Alfons Bräutigam
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.)
Wincor Nixdorf International GmbH
Nixdorf Computer AG
Original Assignee
Wincor Nixdorf International GmbH
Nixdorf Computer AG
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 Wincor Nixdorf International GmbH, Nixdorf Computer AG filed Critical Wincor Nixdorf International GmbH
Publication of EP0195210A2 publication Critical patent/EP0195210A2/fr
Publication of EP0195210A3 publication Critical patent/EP0195210A3/fr
Withdrawn legal-status Critical Current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
    • B41J17/28—Arrangements of guides for the impression-transfer material
    • 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
    • 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

Definitions

  • the invention relates to a thermal transfer printing device, comprising a transport device for a flat recording medium with a printing roller partially wrapped by it on its transport path, a transport device for a ribbon-shaped dye carrier carrying a thermally activatable dye, which is guided on a part of the printing roller circumference essentially parallel to and against the recording medium this can be pressed on, and a thermal head arranged in the pressing area with at least one heating element which is intended for contact with the dye carrier and can be controlled via a control circuit, the pressure roller and the thermal head being adjustable relative to one another by means of an adjusting device between a printing position and a transport position.
  • a device of the type mentioned above is known for example from DE-OS 34 15 827.
  • the thermal head can be lifted off the printing roller in order to enable the recording medium to be transported back.
  • This has the purpose of producing a multicolored image on the record carrier by a multiple overlay of the same print image on the record carrier by means of successive differently colored sections of the dye carrier.
  • the dye carrier and the recording medium pass through the gap between the printing roller and the thermal head synchronously, so that a length of the dye carrier corresponding to the length of the continuous recording medium is always required and thus consumed, regardless of whether the recording medium is really completely covered with characters or whether it covers certain distances without printing.
  • this results in high dye carrier consumption and relatively rapid wear of the thermal head.
  • the invention is based on the object of designing a thermal transfer printing device of the type mentioned at the outset in such a way that the consumption of dye carrier and the wear on the thermal head can be reduced.
  • the actuating device can be operated during the advance of the recording medium by the control device depending on the actuation of the heating element.
  • the printing roller and / thermal head makes it possible to hold the printing roller and / thermal head and thus also the recording medium and the dye carrier in the printing position only during the actual printing process, while the printing roller and / or the thermal head are immediately moved into the transport position if a certain section of the recording medium is not to be printed. While the section of the recording medium that is not to be printed passes through the printing zone, and the feed speed of the recording medium can also be higher than during a printing process, the dye carrier is not loaded during this feeding movement of the recording medium moves, so that the consumption of dye carrier and wear of the thermal head can be significantly reduced.
  • the throughput time of the recording medium can be reduced if the print image contains empty sections in the direction of travel, since the feed speed of the recording medium in the transport position of the printing roller and / or the thermal head can be increased due to the reduced friction.
  • a braking device acting on the dye carrier feed is preferably provided, which is coupled to the actuating device in such a way that it inhibits the dye carrier feed in the transport position of the printing roller and / or thermal head and releases it in the printing position of the printing roller and / or thermal head.
  • This is also advantageous if the dye carrier is not actively transported but is carried along by the recording medium during the printing process in order to avoid unintentional after-running and a consequent possible sagging of the ribbon-shaped dye carrier.
  • the thermal head is preferably adjustable, while the pressure roller can be rotated in fixed bearings.
  • a very simple adjustment option for the thermal head is obtained if it is pivotably mounted about a pivot axis parallel to the pressure roller axis, which lies outside a plane running through the pressure roller axis and the heating element.
  • the thermal head is thus, as it were, mounted on a rocker arm, so that it can be brought up to the printing roller in a very simple manner and lifted off it again.
  • a quick and reliable adjustment of the thermal head can be achieved by an eccentric engaging it, which is by means of a the control circuit controllable motor can be driven. By simply turning the eccentric by 180 °, for example, the thermal head can be lifted off the printing roller or brought back to it.
  • the arrangement is preferably such that the thermal head is usually lifted off the printing roller and is only brought up to the printing roller for the respective printing process.
  • the recording medium and the dye carrier usually stick to one another after the printing process.
  • a deflection edge for the dye carrier which is directed parallel to the pressure roller axis, is arranged in the transport direction directly behind or as close as possible to the heating element. By pulling the dye carrier over this known deflection edge, the dye carrier is peeled off from the record carrier, the dye remaining on the record carrier.
  • the deflection edge is preferably formed on the thermal head itself, as a result of which it can be arranged very close to the heating element or the row of heating elements.
  • the deflection edge can be equipped with a surface made of a low-wear material.
  • the deflection edge can be formed on a part made of ceramic or the like, which in the trans port of the dye carrier or is arranged on the thermal head. If appropriate, the entire thermal head can also consist of a ceramic material, for example.
  • the transport device for the recording medium expediently comprises pressure rollers which press the recording medium against the printing roller independently of the respective position of the printing roller and / or the thermal head, a pressure roller being arranged directly behind the deflection edge in the transport direction .
  • This arrangement facilitates the insertion of the recording medium into the printing device, since the leading edge of the recording medium is guided directly into the nip between the printing roller and the pressure roller by the deflecting edge.
  • 10 denotes a supply roll of a ribbon-shaped dye carrier 12.
  • This is usually a paper web or plastic film that can be melted or sublimated Dye is coated, which can be transferred to a recording medium by the action of heat.
  • the dye carrier 12 is guided via a thermal head 14 to a winding roller 16, on which the used dye carrier is wound up again.
  • heating elements 18 are arranged closely next to one another in a line perpendicular to the feed direction A of the dye carrier 12 (FIG. 2).
  • the heating elements 18 each form a punctiform heat source on the surface of the thermal head 14 facing the dye carrier 12. If certain heating elements 18 are switched on, the dye on the dye carrier 12 melts or sublimates at the relevant points and is thereby transferred to a tape or web-shaped recording medium 20, for example a paper sheet, which is pressed against the side of the thermal head 14 by means of a pressure roller 22 Dye carrier 12 is pressed.
  • the heating elements 18 are connected to a schematically indicated control circuit 24 which determines which heating elements are activated at a given point in time.
  • the recording medium 20 and the dye carrier 12 pass through the gap formed by the printing roller 22 and the thermal head 14 synchronously. This means that, for example, when running through a recording medium 20 in the A4 format, a length of the dye carrier 12 corresponding to a A4 page would also pass through the heating elements 18. If the page was only partially inscribed, this would have the disadvantage that a certain distance of unused dye carrier is lost as waste.
  • the thermal head is pivotally mounted about a pivot axis 28 parallel to the axis 26 of the pressure roller 22, so that it can be pivoted between the printing position represented by solid lines and the transport position indicated by dashed lines, in which the recording medium 20 can be transported around the printing roller 22 in the direction of arrow B without contact with the dye carrier 12, the recording medium 20 being applied by pressure rollers 30 the platen roller 22 is held.
  • the thermal head 14 is adjusted with the aid of an eccentric 32 which is driven by a motor 34, which is only indicated schematically. The latter is in turn controlled by the control circuit 24.
  • the thermal head 14 is in the transport position shown by broken lines, so that the dye carrier 12 is lifted off the recording medium 20.
  • a schematically indicated band brake 36 is provided, which is always effective and brakes the dye carrier 12 when the thermal head 14 is lowered into the position shown in dashed lines.
  • the brake 36 does not necessarily have to act on the dye carrier 12, but can also act on the supply roller 10 (e.g. in the form of a schematically indicated drag brake 38) and / or on the take-up roller 16.
  • the thermal head 14 is then raised by means of the eccentric 32 and presses the dye carrier 12 against the recording medium 20.
  • a deflection edge 40 is formed on the thermal head 14 in the transport direction immediately behind the heating elements 18, over which the dye carrier 12 is pulled off at an acute angle, so that it can be separated properly from the recording medium 20 without dye particles from the recording medium 20 to tear down again.
  • this deflection edge 40 is formed on a strip 42 which consists of a particularly hard and wear-resistant material and is fastened to the thermal head 14. Theoretically, it would be the most favorable if the heating elements 18 were arranged directly on the deflection edge 40, but in practice this can only be carried out with considerable effort.

Landscapes

  • Electronic Switches (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Common Mechanisms (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
EP86101288A 1985-03-21 1986-01-31 Imprimante à transmission de chaleur Withdrawn EP0195210A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853510260 DE3510260A1 (de) 1985-03-21 1985-03-21 Thermotransferdruckeinrichtung
DE3510260 1985-03-21

Publications (2)

Publication Number Publication Date
EP0195210A2 true EP0195210A2 (fr) 1986-09-24
EP0195210A3 EP0195210A3 (fr) 1987-08-26

Family

ID=6265924

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86101288A Withdrawn EP0195210A3 (fr) 1985-03-21 1986-01-31 Imprimante à transmission de chaleur

Country Status (3)

Country Link
EP (1) EP0195210A3 (fr)
JP (1) JPS61225087A (fr)
DE (1) DE3510260A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU639380B2 (en) * 1991-06-20 1993-07-22 Scheidt & Bachmann Gmbh Thermoprinter

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3715523A1 (de) * 1987-05-09 1988-11-17 Uniprint As Vorrichtung zum bedrucken von etiketten
DE10218842B4 (de) 2002-04-23 2005-03-17 Bizerba Gmbh & Co. Kg Druckvorrichtung und Verfahren zum Bedrucken eines Informationsträgers

Citations (6)

* 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
DE3117445A1 (de) * 1980-05-12 1982-02-25 Toyo Electronics Industry Corp., Kyoto "thermischer druckkopf"
DE3226194A1 (de) * 1981-07-15 1983-02-03 Sato Kk Thermokopf-halterungsvorrichtung fuer thermo-drucker
EP0098033A2 (fr) * 1982-06-29 1984-01-11 Kabushiki Kaisha Toshiba Dispositif d'impression thermique par transfert d'encre
US4458253A (en) * 1982-12-30 1984-07-03 International Business Machines Corporation Thermal print apparatus using a thermal transfer ribbon such as a multi-colored one, and a printing method
EP0126627A1 (fr) * 1983-05-19 1984-11-28 Peter Norman Robert Hunter Une imprimante

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57128569A (en) * 1981-02-02 1982-08-10 Mitsubishi Electric Corp Printer
JPS5853454A (ja) * 1981-09-25 1983-03-30 Fuji Xerox Co Ltd 熱転写型感熱記録装置
JPS58140268A (ja) * 1982-02-16 1983-08-19 Toshiba Corp 感熱転写記録装置
JPS59192587A (ja) * 1983-04-18 1984-10-31 Nec Corp 熱転写記録装置
JPS59198196A (ja) * 1983-04-27 1984-11-09 Ricoh Co Ltd 熱転写形プリンタの記録方式
US4658270A (en) * 1983-07-27 1987-04-14 Sharp Kabushiki Kaisha Recording apparatus
JPS60245567A (ja) * 1984-05-22 1985-12-05 Yonezawa Nippon Denki Kk 熱転写プリンタ

Patent Citations (6)

* 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
DE3117445A1 (de) * 1980-05-12 1982-02-25 Toyo Electronics Industry Corp., Kyoto "thermischer druckkopf"
DE3226194A1 (de) * 1981-07-15 1983-02-03 Sato Kk Thermokopf-halterungsvorrichtung fuer thermo-drucker
EP0098033A2 (fr) * 1982-06-29 1984-01-11 Kabushiki Kaisha Toshiba Dispositif d'impression thermique par transfert d'encre
US4458253A (en) * 1982-12-30 1984-07-03 International Business Machines Corporation Thermal print apparatus using a thermal transfer ribbon such as a multi-colored one, and a printing method
EP0126627A1 (fr) * 1983-05-19 1984-11-28 Peter Norman Robert Hunter Une imprimante

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, Band 23, Nr. 5, Oktober 1980, Seite 2012, Armonk, US; S.L. APPLEGATE et al.: "Electrothermal ribbon path" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU639380B2 (en) * 1991-06-20 1993-07-22 Scheidt & Bachmann Gmbh Thermoprinter

Also Published As

Publication number Publication date
JPS61225087A (ja) 1986-10-06
DE3510260C2 (fr) 1987-09-10
EP0195210A3 (fr) 1987-08-26
DE3510260A1 (de) 1986-10-02

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