EP0121379A2 - Elément encré sensible à la chaleur pour imprimantes sans impact de type thermique - Google Patents

Elément encré sensible à la chaleur pour imprimantes sans impact de type thermique Download PDF

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Publication number
EP0121379A2
EP0121379A2 EP84301913A EP84301913A EP0121379A2 EP 0121379 A2 EP0121379 A2 EP 0121379A2 EP 84301913 A EP84301913 A EP 84301913A EP 84301913 A EP84301913 A EP 84301913A EP 0121379 A2 EP0121379 A2 EP 0121379A2
Authority
EP
European Patent Office
Prior art keywords
mixture
black
resin
element according
wax
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
EP84301913A
Other languages
German (de)
English (en)
Other versions
EP0121379B1 (fr
EP0121379A3 (en
Inventor
Franco Knirsch
Giovanni Gianolini
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.)
Telecom Italia SpA
Olivetti SpA
Original Assignee
Olivetti SpA
Ing C Olivetti and C SpA
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 Olivetti SpA, Ing C Olivetti and C SpA filed Critical Olivetti SpA
Publication of EP0121379A2 publication Critical patent/EP0121379A2/fr
Publication of EP0121379A3 publication Critical patent/EP0121379A3/en
Application granted granted Critical
Publication of EP0121379B1 publication Critical patent/EP0121379B1/fr
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/392—Additives, other than colour forming substances, dyes or pigments, e.g. sensitisers, transfer promoting agents
    • B41M5/395—Macromolecular additives, e.g. binders

Definitions

  • Tne present invention relates to a heat-sensitive inked element for impactless printers of thermal type, comprising a plastics material base carrier coated on one side with a coating of a mixture which is transferable to a printing carrier when it is subjected to heat and pressure, the mixture comprising a pigment and/or colouring agent, a thermoplastic resin and a wax.
  • the object of the present invention is to provide an inked element in which the resin-wax mixture does not require any plasticising agent to reduce the fragility of the coating and is sufficiently resistant to rubbing against any type of printing carrier.
  • the inked element according to the invention is characterised in that the resin is of thermoadhesive polymeric type and the wax is of polymeric type compatible with the resin and such as to impart to the mixture a high characteristic in respect of plasticity and softness, thereby to cause the ink to adhere to any printing carrier having a roughness of between 10 and 500 ml/min.
  • the ribbon comprises a thermoplastic material base carrier which is covered on one side with a thin layer of solid ink thermotransferable to a printing carrier of paper or thermoplastic nature.
  • the printing process provides for the simultaneous application of pressure and heat by means of a printing head to the inked ribbon to produce the effect of transfer of the ink from the ribbon to the printing carrier.
  • the ribbon is provided for printing with a serial thermal head comprising a vertical raw of printing elements, and with a definition of 8 to 10 dots/mm at the normal typing or automatic printing rate of from 20 to 40 characters/sec. That makes it possible to achieve a high quality in respect of print, character definition, resistance to rubbing and clean adhesion to the printing carrier (card or plastics film), whether it is of a smooth type (10 to 30 ml/min) or very rough type (300 to 500 ml/min).
  • the inking mixture or ink used for the ribbon has the particular feature of having a binder of polymeric type such that, when it is heated, it softens, substantially increasing adhesiveness to the printing carrier.
  • the binders used are generally employed for formulating adhesives which are applied by a hot fusion process, known as hot melt.
  • a colouring agent and/or pigment is added to the mixture of the two basic components, wax and resin, in order to produce a black or coloured ribbon.
  • the colouring agent and/or pigment is suitably selected so as to be compatible with the basic components, not alter with time, and thus be stable with respect to temperature and the ambient air.
  • Such a type of ribbon when prepared in black or coloured form (red, green, blue, brown, cyan, magenta or yellow) is primarily used in printing machines of thermal type.
  • the possibility of producing high-quality printing that is to say, with a high level of character definition, uniformity of covering of the dot without gaps, high level of adhesion of the character to the printing carrier, and the absence of any possibility of blotting due to friction, also depends on the substrate on which the inking mixture is coated, besides the characteristics of the ink and the binder.
  • the bowl is set milling for 76 hours. After the milling operation, the glass marbles are separated off and 100g of toluene and 60g of MI K are added and the ink produced in that way is then spread in a spreading machine over a polythene carrier which is 10 p in thickness.
  • the ribbon produced with the polythene carrier makes it possible to print with a high quality of printing over a wide range of office papers, at a rate of 20 characters/sec.
  • the quality of printing is satisfactory even at printing rates of up to 40 characters/sec.
  • the addition to black of the three colours cyan, magenta and yellow, which are complementary with respect to the three primary colours red, green and violet, serve to impart a more intense shade to the black, inasmuch as synthesis of the three complementary colours gives black.
  • the three colours are added to the black in a percentage of about 40% of the amount of black.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
EP84301913A 1983-03-30 1984-03-21 Elément encré sensible à la chaleur pour imprimantes sans impact de type thermique Expired EP0121379B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT67353/83A IT1158916B (it) 1983-03-30 1983-03-30 Elemento inchiostrato termosensibile per stampanti senza iimpatto di tipo termico
IT6735383 1983-03-30

Publications (3)

Publication Number Publication Date
EP0121379A2 true EP0121379A2 (fr) 1984-10-10
EP0121379A3 EP0121379A3 (en) 1985-05-02
EP0121379B1 EP0121379B1 (fr) 1989-07-19

Family

ID=11301687

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84301913A Expired EP0121379B1 (fr) 1983-03-30 1984-03-21 Elément encré sensible à la chaleur pour imprimantes sans impact de type thermique

Country Status (4)

Country Link
EP (1) EP0121379B1 (fr)
JP (1) JPS59196295A (fr)
DE (1) DE3479013D1 (fr)
IT (1) IT1158916B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3522801C1 (de) * 1985-06-26 1986-10-23 Pelikan Ag, 3000 Hannover Thermofarbband sowie ein Verfahren zu dessen Herstellung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1192920A (en) * 1966-08-31 1970-05-28 Molins Machine Co Ltd Production of Particulate Inks
US3944695A (en) * 1972-08-12 1976-03-16 Toyo Soda Manufacturing Co., Ltd. Heat printing sheet
GB2010515A (en) * 1977-12-15 1979-06-27 Ibm Thermographic Materials
EP0033364A1 (fr) * 1980-02-04 1981-08-12 International Business Machines Corporation Ruban pour écriture sans percussion
GB2069160A (en) * 1980-01-07 1981-08-19 Fuji Kagaku Shikogyo Heat-sensitive colour transfer ribbon
EP0076044A2 (fr) * 1981-09-21 1983-04-06 Ing. C. Olivetti & C., S.p.A. Elément encré thermosensible pour imprimante sans percussion

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53144751A (en) * 1977-05-23 1978-12-16 Riso Kagaku Corp Thermosensitive transfer sheet
JPS5468253A (en) * 1977-11-09 1979-06-01 Gen Corp Heat sensitive transfer medium
JPS6059159B2 (ja) * 1978-06-15 1985-12-24 三菱電機株式会社 感熱転写記録材料
JPS5630892A (en) * 1979-08-24 1981-03-28 Maruwa Kogyo Kk Thermal transfer stencil paper
JPS56105994A (en) * 1980-01-28 1981-08-22 Canon Inc Ink carrier for heat transcription
JPS5849296A (ja) * 1981-09-18 1983-03-23 Ricoh Co Ltd 感熱転写用記録材料

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1192920A (en) * 1966-08-31 1970-05-28 Molins Machine Co Ltd Production of Particulate Inks
US3944695A (en) * 1972-08-12 1976-03-16 Toyo Soda Manufacturing Co., Ltd. Heat printing sheet
GB2010515A (en) * 1977-12-15 1979-06-27 Ibm Thermographic Materials
GB2069160A (en) * 1980-01-07 1981-08-19 Fuji Kagaku Shikogyo Heat-sensitive colour transfer ribbon
EP0033364A1 (fr) * 1980-02-04 1981-08-12 International Business Machines Corporation Ruban pour écriture sans percussion
EP0076044A2 (fr) * 1981-09-21 1983-04-06 Ing. C. Olivetti & C., S.p.A. Elément encré thermosensible pour imprimante sans percussion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3522801C1 (de) * 1985-06-26 1986-10-23 Pelikan Ag, 3000 Hannover Thermofarbband sowie ein Verfahren zu dessen Herstellung

Also Published As

Publication number Publication date
IT1158916B (it) 1987-02-25
DE3479013D1 (en) 1989-08-24
EP0121379B1 (fr) 1989-07-19
JPS59196295A (ja) 1984-11-07
EP0121379A3 (en) 1985-05-02
IT8367353A0 (it) 1983-03-30

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