ES2060113T3 - Sistema y procedimiento de control del contraste para una cabeza termica de escritura. - Google Patents

Sistema y procedimiento de control del contraste para una cabeza termica de escritura.

Info

Publication number
ES2060113T3
ES2060113T3 ES90403412T ES90403412T ES2060113T3 ES 2060113 T3 ES2060113 T3 ES 2060113T3 ES 90403412 T ES90403412 T ES 90403412T ES 90403412 T ES90403412 T ES 90403412T ES 2060113 T3 ES2060113 T3 ES 2060113T3
Authority
ES
Spain
Prior art keywords
contrast control
printer
elements
series
adjusted
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
ES90403412T
Other languages
English (en)
Inventor
Christian Lavergne
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.)
Sagem SA
Original Assignee
Sagem 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 Sagem SA filed Critical Sagem SA
Application granted granted Critical
Publication of ES2060113T3 publication Critical patent/ES2060113T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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

Landscapes

  • Electronic Switches (AREA)
  • Facsimile Heads (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)

Abstract

LA INVENCION TIENE POR OBJETO UN PROCEDIMIENTO DE CONTROL DEL CONTRASTE DE UN SOPORTE DE IMPRESION PRODUCIDO POR UNA CABEZA TERMICA DE ESCRITURA (1) DE UNA IMPRESORA DE UN SISTEMA DE TRANSMISION DE DATOS QUE CONTIENE UNA SERIE DE ELEMENTOS RESISTIVOS AGENCIADOS PARA ESTAR ACTIVADOS POR EL PASO DE UNA CORRIENTE QUE VIENE DE UNA TARJETA (3) EN CONEXION CON UNA FUENTE DE POTENCIA (4) Y PARA, DE ESA MANERA, CALENTAR. LOS TIEMPOS DE ACTIVACION DE LOS ELEMENTOS ESTAN REGULADOS AL PRINCIPIO DE LA IMPRESION PARA UN CICLO DE IMPRESION DE UNA DURACION MINIMA. PARA CICLOS MAS LARGOS, LOS ELEMENTOS SE REACTIVAN (14) EN CUANTO SU TEMPERATURA AL BAJAR ALCANZA SU TEMPERATURA INICIAL POR UNA SERIE DE MICROCICLOS DE MANTENIMIENTO DE DURACION DE ACTIVACION MUY BREVE. SI SE TRATA DE LA IMPRESORA DE UN FAX, PARA LO CUAL ESTA INVENCION SE APLICA PARTICULARMENTE BIEN, EL CONTRASTE PUEDE REGULARSE EN FUNCION DE LA NATURALEZA O DE LA CALIDAD DEL PAPEL TERMOSENSIBLE Y DEL RENDIMIENTO QUE SE QUIERE OBTENER EN RELACION CON UN DOCUMENTO ORIGINAL.
ES90403412T 1989-12-07 1990-11-30 Sistema y procedimiento de control del contraste para una cabeza termica de escritura. Expired - Lifetime ES2060113T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8916181A FR2655592B1 (fr) 1989-12-07 1989-12-07 Procede de controle du contraste d'un support d'impression produit par une tete thermique d'ecriture et systeme d'impression mettant en óoeuvre le procede.

Publications (1)

Publication Number Publication Date
ES2060113T3 true ES2060113T3 (es) 1994-11-16

Family

ID=9388251

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90403412T Expired - Lifetime ES2060113T3 (es) 1989-12-07 1990-11-30 Sistema y procedimiento de control del contraste para una cabeza termica de escritura.

Country Status (6)

Country Link
EP (1) EP0432024B1 (es)
AT (1) ATE108728T1 (es)
DE (1) DE69010859T2 (es)
DK (1) DK0432024T3 (es)
ES (1) ES2060113T3 (es)
FR (1) FR2655592B1 (es)

Family Cites Families (4)

* 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
JPS6327271A (ja) * 1986-07-18 1988-02-04 Shinko Electric Co Ltd 熱転写式プリンタ
JPS6318259U (es) * 1986-07-22 1988-02-06
JPH0632943B2 (ja) * 1986-10-20 1994-05-02 株式会社日立製作所 熱転写プリンタ

Also Published As

Publication number Publication date
EP0432024A1 (fr) 1991-06-12
DE69010859T2 (de) 1995-03-09
ATE108728T1 (de) 1994-08-15
FR2655592A1 (fr) 1991-06-14
FR2655592B1 (fr) 1995-04-07
DK0432024T3 (da) 1994-11-21
EP0432024B1 (fr) 1994-07-20
DE69010859D1 (de) 1994-08-25

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