EP0603017B1 - Druckverfahren durch Wärmeübertragung - Google Patents

Druckverfahren durch Wärmeübertragung Download PDF

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Publication number
EP0603017B1
EP0603017B1 EP19930402552 EP93402552A EP0603017B1 EP 0603017 B1 EP0603017 B1 EP 0603017B1 EP 19930402552 EP19930402552 EP 19930402552 EP 93402552 A EP93402552 A EP 93402552A EP 0603017 B1 EP0603017 B1 EP 0603017B1
Authority
EP
European Patent Office
Prior art keywords
heating
cycle
printing
lines
points
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
EP19930402552
Other languages
English (en)
French (fr)
Other versions
EP0603017A1 (de
Inventor
Paul Cabinet Ballot-Schmit Morgavi
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.)
Gemplus SA
Original Assignee
Gemplus Card International SA
Gemplus SA
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 Gemplus Card International SA, Gemplus SA filed Critical Gemplus Card International SA
Publication of EP0603017A1 publication Critical patent/EP0603017A1/de
Application granted granted Critical
Publication of EP0603017B1 publication Critical patent/EP0603017B1/de
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
    • 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
    • B41J2/35—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 providing current or voltage to the thermal head
    • B41J2/355—Control circuits for heating-element selection
    • B41J2/36—Print density control
    • B41J2/365—Print density control by compensation for variation in temperature

Definitions

  • the invention relates to a thermal transfer printing process.
  • the invention applies to thermal printing on any support and in particular on plastic supports such as electronic cards.
  • thermal transfer printing machines use a printing head which includes a line of heating points obtained by electrical resistances. The heating of the points is caused by the passage of an electric current through the resistors.
  • the heating dots are applied on a thermosensitive support or an ink ribbon, several lines of parallel dots are successively printed and allow to give the final pattern of the printing.
  • An electronic device comprising a current pulse generator and a generator control program is capable of supplying current pulses of required level and according to a programmed heating cycle.
  • the present invention makes it possible to solve this problem without having the drawbacks of the solutions known to date. It relates to a thermal transfer printing process from a print head comprising a line of heating points, the heating of the points being done by application of heating pulses, mainly characterized in that it consists applying the heating pulses according to a determined heating cycle during the first N printing lines and reversing the cycle regularly. The cycle is preferably reversed every N lines.
  • FIGS 1A, 1B, 2A, 2B and 3 relate to the state of the art and have already been described.
  • the method according to the invention consists in applying current pulses according to a heating cycle on a predetermined number of lines, then in reversing this cycle on a determined number of lines as shown in the example given in FIG. 4.
  • a heating cycle as given in this first example is applied to each printing line and this on a predetermined number N of lines.
  • the number N is determined experimentally for each printhead, the number chosen being that which gives the best printing results.
  • the heating cycle is regularly reversed. As can be seen in FIGS.
  • the cycle is reversed when each pair comprising a heating time and a cooling time contained in this cycle is replaced by the pair where the order of the heating and cooling times is inverted, each heating then cooling sequence being replaced by the cooling then heating sequence and vice versa.
  • the cycle is reversed for the next N lines or for a number of lines substantially equal to N.
  • the cycle starts again at line N + 1 and according to the example taken, it begins with a cooling time followed by a heating pulse and so on.
  • the heating pulses recommended by the manufacturer are used according to the invention, but applied in the manner just indicated.
  • the alternation of the heating and cooling times according to the method makes it possible overall to cool the heating points every N lines (N depending on the characteristics of the head) which avoids the overheating and this very quickly but keeping the same level for all printed dots (even isolated).
  • the technical solution proposed makes it possible to maintain a constant and rapid printing speed without overheating the heating points for a very low price.
  • the print quality is thereby improved without having to use expensive heads or sophisticated electronics as in the prior art.
  • the method is implemented by the electronic control device of the head.
  • the control program of the existing pulse generator has been modified, this modification being within the reach of those skilled in the art so as to reverse the heating cycle planned, every N lines.

Landscapes

  • Electronic Switches (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Claims (2)

  1. Druckverfahren durch Wärmeübertragung, ausgehend von einem Druckkopf, der eine Reihe von beheizenden Punkten aufweist, wobei die Erhitzung der Punkte durch Aufbringung von Heizimpulsen erfolgt, dadurch gekennzeichnet, daß es darin besteht, die Heizimpulse gemäß einem bestimmten Heizzyklus während der N ersten Druckzeilen aufzubringen und den Zyklus regelmäßig umzukehren, wobei ein bestimmter Heizzyklus dann umgekehrt ist, wenn jedes Paar, das eine Heizzeit und eine Abkühlzeit aufweist und in diesem Zyklus enthalten ist, ersetzt wird durch ein Paar, bei dem die Reihenfolge der Heiz- und Abkühlzeit umgekehrt ist, wobei jede Folge aus Heizung und dann Abkühlung ersetzt ist durch die Folge aus Abkühlung und dann Heizung und umgekehrt.
  2. Druckverfahren durch Wärmeübertragung nach Anspruch 1, dadurch gekennzeichnet, daß der Zyklus in allen N Zeilen umgekehrt wird.
EP19930402552 1992-10-19 1993-10-15 Druckverfahren durch Wärmeübertragung Expired - Lifetime EP0603017B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9212490A FR2696978B1 (fr) 1992-10-19 1992-10-19 Procédé d'impression par transfert thermique.
FR9212490 1992-10-19

Publications (2)

Publication Number Publication Date
EP0603017A1 EP0603017A1 (de) 1994-06-22
EP0603017B1 true EP0603017B1 (de) 1996-07-17

Family

ID=9434670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930402552 Expired - Lifetime EP0603017B1 (de) 1992-10-19 1993-10-15 Druckverfahren durch Wärmeübertragung

Country Status (5)

Country Link
EP (1) EP0603017B1 (de)
JP (1) JPH06210889A (de)
DE (1) DE69303697T2 (de)
ES (1) ES2090918T3 (de)
FR (1) FR2696978B1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69628739T2 (de) * 1995-12-26 2004-04-29 General Electric Co., Fairfield Steuerung und überwachung von dimmbaren vorschaltgeräten mit breitem beleuchtungshub
JP2008068464A (ja) * 2006-09-13 2008-03-27 Mitsubishi Electric Corp サーマルヘッドの制御方法
MY156926A (en) 2008-12-25 2016-04-15 Brother Ind Ltd Tape cassette
ES2554777T3 (es) 2008-12-25 2015-12-23 Brother Kogyo Kabushiki Kaisha Cartucho de cinta e impresora de cinta
WO2010113440A1 (en) 2009-03-31 2010-10-07 Brother Kogyo Kabushiki Kaisha Tape cassette and tape printer
CN101850662B (zh) 2009-03-31 2015-02-11 兄弟工业株式会社 带式打印装置
JP5136503B2 (ja) 2009-03-31 2013-02-06 ブラザー工業株式会社 テープカセット
EP3546232B1 (de) 2009-03-31 2023-11-22 Brother Kogyo Kabushiki Kaisha Bandkassette
WO2010113365A1 (ja) 2009-03-31 2010-10-07 ブラザー工業株式会社 テープカセット
WO2011001487A1 (en) 2009-06-30 2011-01-06 Brother Kogyo Kabushiki Kaisha Tape cassette and tape printer
EP2845743B1 (de) 2009-12-16 2018-01-31 Brother Kogyo Kabushiki Kaisha Bandkassette
EP2520437B1 (de) 2009-12-28 2015-05-20 Brother Kogyo Kabushiki Kaisha Bandkassette
JP5093265B2 (ja) 2010-02-26 2012-12-12 ブラザー工業株式会社 テープカセット
JP5093283B2 (ja) * 2010-03-31 2012-12-12 ブラザー工業株式会社 サーマルプリンタ
CN104527230B (zh) * 2015-01-09 2016-02-17 浙江网新电气技术有限公司 一种防止局部过热的热敏车票打印机

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975707A (en) * 1970-04-13 1976-08-17 Canon Kabushiki Kaisha Device for controlling the density of printing characters
US3934695A (en) * 1974-09-23 1976-01-27 Hewlett-Packard Company Method and apparatus for enhancing and maintaining character quality in thermal printers
JPH0365359A (ja) * 1989-08-04 1991-03-20 Fuji Electric Co Ltd 多ビット発熱回路の駆動装置

Also Published As

Publication number Publication date
FR2696978A1 (fr) 1994-04-22
DE69303697D1 (de) 1996-08-22
JPH06210889A (ja) 1994-08-02
ES2090918T3 (es) 1996-10-16
EP0603017A1 (de) 1994-06-22
DE69303697T2 (de) 1996-11-28
FR2696978B1 (fr) 1994-12-09

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