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WO1989010268A1 - Ruban de transfert thermique - Google Patents

Ruban de transfert thermique Download PDF

Info

Publication number
WO1989010268A1
WO1989010268A1 PCT/US1989/001604 US8901604W WO8910268A1 WO 1989010268 A1 WO1989010268 A1 WO 1989010268A1 US 8901604 W US8901604 W US 8901604W WO 8910268 A1 WO8910268 A1 WO 8910268A1
Authority
WO
WIPO (PCT)
Prior art keywords
thermal transfer
wax
transfer ribbon
pigment
ribbon according
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.)
Ceased
Application number
PCT/US1989/001604
Other languages
English (en)
Inventor
Shashi G. Talvalkar
Thomas J. Obringer
Richard D. Puckett
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.)
NCR Voyix Corp
Original Assignee
NCR Corp
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 NCR Corp filed Critical NCR Corp
Publication of WO1989010268A1 publication Critical patent/WO1989010268A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B41M5/385—Contact thermal transfer or sublimation processes characterised by the transferable dyes or pigments
    • 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
    • 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

  • the present invention relates to nonimpact printing. More particularly, the invention provides a thermal transfer ribbon for use in imaging or encoding characters on paper or like record media documents which enable machine, human, or reflectances reading of the imaged or encoded characters.
  • the thermal transfer ribbon enables printing in quiet and efficient manner and makes use of the advantages of thermal printing on documents with a signal inducible in .
  • the impact type printer has been the predominant apparatus for providing increased throughput of printed information.
  • the impact printers have included the dot matrix type wherein individual print wires are driven from a home position to a printing position by individual and separate drivers.
  • the impact printers also have included the full character type wherein individual type elements are caused to be driven against a ribbon and paper or like record media adjacent and in contact with a platen.
  • the typical and well-known arrangement in a printing operation provides for transfer of a portion of the ink from the ribbon to result in a mark or image on the paper.
  • Another arrangement includes the use of carbonless paper wherein the impact from a print wire or a type element causes rupture of encapsulated material for marking the paper.
  • printing inks which contain magnetic particles wherein certain of the particles are transferred to the record media for encoding characters in manner and fashion so as to be machine readable in a subsequent operation.
  • MICR Magnetic Ink Character Recognition
  • the advent of thermal printing which effectively and significantly reduces the noise levels has brought about the requirements for heating of extremely precise areas of the record media by use of relatively high currents.
  • the intense heating of the localized areas causes transfer of ink from a ribbon onto the paper.
  • the paper may be of the thermal type which includes materials that are responsive to the generated heat.
  • thermal printing with different color inks has also been proposed and applied in certain technologies.
  • a thermal transfer ribbon having a transfer coating including a fluorescent coloring material of a reddish-orange hue in a wax material, characterized in that said transfer coating contains 50 to 90% wax including about 20 to 45% hydrocarbon wax, about 35 to 65% paraffin wax, about 5 to 30% carnauba wax and about 3 to 15% acetate copolymer; about 5 to 20% fluorescent pigment and about 5 to 20% color toning pigment, wherein the fluorescence of the transferred image is greater than 10 postage meter units and has a peak wavelength of 625 +25 nanometers, and wherein the total color difference ( ⁇ ) of the transferred image does not exceed 10 on the Hunter Color Scale when using the formula
  • L is defined as a measure of lightness and may have a variance of +5
  • a is a measure on the red-green axis
  • b is a measure on the blue- yellow axis.
  • Fig. 1 illustrates a thermal element operating with a ribbon base having a transfer coating thereon incorporating the ingredients as disclosed in the present invention
  • Fig. 2 shows the receiving paper with a part of the coating transferred in the form of a character onto the receiving paper
  • Fig. 3 is a diagrammatic view of a ribbon base having adjacent coatings along the length thereof;
  • Fig. 4 is a diagrammatic view of a ribbon base having repeated coatings in a modified arrangement
  • Fig. 5 is another modified arrangement of repeated coatings. Best Mode for Carrying Out the Invention
  • the thermal transfer coating of the present invention is specifically designed and formulated to provide a transfer mark or image which meets specific criteria or requirements for a fluorescent red thermal transfer ribbon which is suitable and acceptable for postal applications.
  • Fluorescence of the translated image should be greater than 10 pmu (postage meter unit).
  • the peak wavelength of the fluorescence is at 625 ⁇ 25 nm (nanometers) . ⁇
  • the color of the transferred image is controlled to be within the coloring of a reddish- orange hue similar to the color of the postage meter indicia.
  • L is defined as a measure of lightness
  • a is a measure on the red-green axis
  • b is a measure on the blue-yellow axis.
  • a variance of ⁇ 5 is allowed for the value of L with total color difference ( ⁇ ) not to exceed 10 when using the formula:
  • the transfer ribbon 20 comprises a base or substrate 22 of thin, smooth, tissue-type paper or polyester-type plastic or like material having a coating 24 which is thermally activated and includes nonmagnetic pigment or particles 26 as an ingredient therein for use in imaging or encoding operations to enable human or reflectance reading of characters.
  • a coating 24 which is thermally activated and includes nonmagnetic pigment or particles 26 as an ingredient therein for use in imaging or encoding operations to enable human or reflectance reading of characters.
  • Each character that is imaged on a receiving paper 28 or like record media produces a unique waveform that is recognized and read by the reader.
  • the pigment or particles 26 include coloring materials such as pigments, fillers and dyes.
  • thermal transfer ribbon 20 provides the advantages of thermal printing while encoding or imaging the document 28 with a nonmagnetic signal inducible ink.
  • the imaging or encoding operation requires that the pigment or particles of material 26 on the coated ribbon 20 be completely transferred from the ribbon to the document 28 in manner and form to produce the precisely defined characters 32 for recognition by the reader.
  • the imaging or encoding material 26 is completely transferred to the document 28 to produce the precisely defined characters 32 for recognition and machine, human, or reflectance reading thereof.
  • Fig. 3 is a diagrammatic view of a substrate 34 having a width occupied by a fluorescent thermal transfer coating 36 on approximately one half of the substrate and a thermal transfer coating 40 of another color on the other half of the substrate.
  • the coating 36 includes pigment or particles 38 and the coating 40 includes pigment or particles 42.
  • the width of the substrate 34 or of the printed area of the transfer coatings 36 and 40 is dependent upon the configuration of the thermal printer or like apparatus that is used for causing transfer of the image from the base or substrate to the paper or other document.
  • Fig. 3 shows a distinct line of demarcation 35 between the fluorescent coating 36 and the coating 40 of another color. It is understood, of course, that minor variations of either an uncoated or clear strip along the line 35 or an overlapping of the coatings 36 and 40 may unintentionally occur.
  • Fig. 4 is a diagrammatic view of a substrate 44 having a portion thereof coated with a fluorescent thermal transfer coating 46 and an adjacent portion coated with a thermal transfer coating 48 of another color.
  • the coatings 46 and 48 are repeated along the length of the substrate 44.
  • the coating 46 has pigment or particles 50 and the coating 48 has pigment or particles 52.
  • Fig. 5 is a diagrammatic view of a wider substrate 54 having a narrow portion thereof coated with a fluorescent thermal transfer coating 56 and an adjacent narrow portion coated with a thermal transfer coating 58 of another color.
  • the coatings 56 and 58 are repeated along the length of the substrate.
  • the coating 56 contains pigment or particles 60 and the coating 58 contains pigment or particles 62.
  • the arrows 64 indicate the direction in which the transfer ribbon is advanced or transported in a printing or imaging operation.
  • the thermal transfer ribbon of the present invention is produced in a two stage process wherein the first stage includes preparation of a specific wax emulsion or formulation, and the second stage includes preparation of the transfer coating or layer.
  • a wax adhesive emulsion uses hydrocarbon, paraffin or ozocerite, carnauba, macrocrystalline waxes and an ethylene vinyl acetate copolymer and/or a hydrocarbon resin soluble in aliphatic solvents.
  • the wax emulsion uses waxes plus the acetate copolymer plus the hydrocarbon resin in one formulation.
  • the wax emulsion uses waxes plus the acetate copolymer or the hydrocarbon resin.
  • a preferred wax adhesive emulsion or formulation at 20% to 50% solids to satisfy the requirements of the first stage of the process includes the specific ingredients in appropriate amounts as set forth in Table 1 of Example I.
  • the nonvolatile materials in the above formulation equate from 20% to 50%, and it is here noted that Lacolene, or VM and P Naptha, can be substituted in place of the mineral spirits.
  • the wax emulsion is heated to 60°C while mixing the above solution and then is allowed to cool to room temperature at the end of the first stage.
  • the second stage of the process includes preparation of a preferred fluorescent color, thermal transfer coating wherein the above wax emulsion is heated to a temperature between 40-45°C and the following ingredients in appropriate amounts, as set forth in Table 2, are placed into dispersion equipment such as a ball mill, a shot mill, a sand mill, or an attritor, and then ground for a period of approximately 20-40 minutes, or for a sufficient period of time to provide a uniform fine (3-5 microns size) dispersion.
  • dispersion equipment such as a ball mill, a shot mill, a sand mill, or an attritor
  • Example II provides the specific ingredients in appropriate amounts for another fluorescent coating which uses different pigments.
  • Example III provides the specific ingredients in appropriate amounts for yet another fluorescent coating which uses different pigments.
  • Example IV provides the specific ingredients in appropriate amounts for still another fluorescent coating which uses a hydrocarbon resin and a different arrangement of pigments.
  • Wax Emulsion 69.9 1923.8 50-80% (From Table 1)
  • Paraffin 162 wax is a mixture of solid crystalline hydrocarbons chiefly of the methane series derived from the paraffin distillate portion of crude petroleum and is soluble in benzene, ligroine, warm alcohol, chloroform, turpentine, carbon disulfide and olive oil.
  • WB-7 and WB-17 are oxidized, isocyanated hydrocarbon waxes.
  • Carnauba #3 is a hard, amorphous wax derived by exudation from leaves of the wax palm and is soluble in ether, boiling alcohol and alkalies.
  • Ozocerite is a natural paraffin wax occurring in irregular veins, consists principally of hydrocarbons, is soluble in water and has a variable melting point.
  • Elvax 40W and 4310 are ethylene vinyl acetate copolymers.
  • Piccotex-75 is one of the series of hydrocarbon resins and defined as a hard, color stable, substituted styrene coploymer resin.
  • the class or group of microcrystalline waxes may also be used in the wax emulsion and essentially consist of petroleum waxes having a higher molecular weight, a higher melting point, and a higher viscosity than paraffin wax.
  • the Lithol Scarlet K-3700 and L-3700, the Paliogen 3911 HD and 10-5C-35-A102 ingredients are toning pigments, and the White Pigment and the Fire Orange are fluorescent pigments.
  • the Red-Orange PM Base is a fluorescent pigment.
  • Red Toner #8197 is a toning pigment, and ARC Yellow A16N is a fluorescent pigment. It is noted that a pigment is defined as a solid that reflects light of certain wavelengths while absorbing light of other wavelengths, without producing appreciable luminescence; in effect, pigments are used to impart color to other materials.
  • the nonvolatile materials of the fluorescent dispersion are controlled at 25% to 55% for proper viscosity. It should be noted that all ingredients are carefully weighed and solubilized in the mineral spirits using appropriate heat and agitation. After the solution is complete, it is slowly cooled to form a viscous wax dispersion to prepare a thermally active, transfer coating.
  • the substrate or base 22 which may be 30-40 gauge capacitor tissue, manufactured by Glatz, or 14- 35 gauge polyester film as manufactured by duPont under the trademark Mylar, should have a high tensile strength to provide for ease in handling and coating of the substrate. Additionally, the substrate should have properties of minimum thickness and low heat resistance to prolong the life of the heating elements 30 of the thermal print head by reason of reduced print head actuating voltage and the resultant reduction in burn time.
  • the coating 24 is applied to the substrate 22 by means of conventional coating techniques such as a Meyer rod or like wire-wound doctor bar set up on a typical solvent coating machine to provide a coating thickness in a range of 2.54 to 10.16 microns. This coating thickness equates to a coating weight of between 9 and 16 milligrams per 25.5 square centimetres.
  • the coating is made up of approximately 25% to 55% nonvolatile material and is maintained at a desired temperature and viscosity throughout the coating process. A temperature of approximately 40- 45°C is maintained during the entire coating process.
  • the web of ribbon is passed through a dryer at an elevated temperature in the range between 93 and 120°C for approximately 5-10 seconds to ensure good drying and adherence of the coating 24 onto the substrate 22 in making the transfer ribbon 20.
  • the coating 24 can be fully transferred onto the receiving substrate or paper 28 in the range of 50-120°C by changing the ranges of the waxes used in the first step of the process.
  • the method of thermal transfer of the images by use of a dry ribbon enables the creation of the fluorescent mark or image which is recognized for postage recognition applications.
  • the fluorescent mark or image is produced by suitable software control of a thermal transfer printer to create a bar code or other postal indicia which can be recognized by reading of the mark.
  • Fig. 3 In the case where a dual color ribbon is desired, the arrangement of Fig. 3 can be used wherein a portion of the ribbon width comprises the fluorescent color and the other portion of the ribbon comprises a red, black, blue, yellow color or a mixture of colors.
  • Figs. 4 and 5 illustrate a sequential arrangement of the fluorescent color and any other color or mixture of colors in repeated manner.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)

Abstract

L'invention concerne un ruban (20) de transfert thermique comportant un substrat (22) recouvert d'une couche (24). La couche (34) comprend un ou plusieurs pigments fluorescents (26) ainsi qu'un ou plusieurs pigments de coloration (26) dans une couche de matière cireuse. La fluorescence de l'image transférée doit être supérieure à 10 unités d'affranchissement et avoir une longueur d'onde de crête de 625 U 25 namomètres. Le ruban de l'invention est spécifiquement conçu pour produire une marque ou une image de transfert (32) satisfaisant les critères et les conditions des applications postales.
PCT/US1989/001604 1988-04-28 1989-04-17 Ruban de transfert thermique Ceased WO1989010268A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US18713888A 1988-04-28 1988-04-28
US187,138 1988-04-28

Publications (1)

Publication Number Publication Date
WO1989010268A1 true WO1989010268A1 (fr) 1989-11-02

Family

ID=22687761

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1989/001604 Ceased WO1989010268A1 (fr) 1988-04-28 1989-04-17 Ruban de transfert thermique

Country Status (3)

Country Link
EP (1) EP0368960A1 (fr)
JP (1) JPH02504015A (fr)
WO (1) WO1989010268A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0539001A1 (fr) * 1991-10-25 1993-04-28 Minnesota Mining And Manufacturing Company Rubans donneurs de colorants fluorescents pour l'enregistrement par le transfert thermique
US6682810B1 (en) 1999-03-16 2004-01-27 Heriot-Watt University Fluorescent materials
EP1270246B1 (fr) * 2001-06-19 2005-11-02 Dai Nippon Printing Co., Ltd. Méthode pour former des images fluorescentes, impression, et feuille pour transfert thermique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4307149A (en) * 1979-11-05 1981-12-22 Columbia Ribbon & Carbon Mfg. Co., Inc. Transfer elements and process for making same
GB2163270A (en) * 1984-06-22 1986-02-19 Ricoh Kk Thermal transfer recording medium

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4307149A (en) * 1979-11-05 1981-12-22 Columbia Ribbon & Carbon Mfg. Co., Inc. Transfer elements and process for making same
GB2163270A (en) * 1984-06-22 1986-02-19 Ricoh Kk Thermal transfer recording medium

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, vol. 8, no. 158 (M-311)(1595) 21 July 1984; & JP-A-5954598 (FUJI KAGAKU SHIKOUGIYOU K.K.) 29 March 1984 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0539001A1 (fr) * 1991-10-25 1993-04-28 Minnesota Mining And Manufacturing Company Rubans donneurs de colorants fluorescents pour l'enregistrement par le transfert thermique
US6682810B1 (en) 1999-03-16 2004-01-27 Heriot-Watt University Fluorescent materials
US7079262B2 (en) 1999-03-16 2006-07-18 Heroit-Watt University Fluorescent materials
EP1270246B1 (fr) * 2001-06-19 2005-11-02 Dai Nippon Printing Co., Ltd. Méthode pour former des images fluorescentes, impression, et feuille pour transfert thermique
US7005166B2 (en) 2001-06-19 2006-02-28 Dai Nippon Printing Co., Ltd. Method for fluorescent image formation, print produced thereby and thermal transfer sheet thereof
US7504190B2 (en) 2001-06-19 2009-03-17 Dai Nippon Printing Co., Ltd. Method for fluorescent image formation, print produced thereby and thermal transfer sheet thereof
US7989390B2 (en) 2001-06-19 2011-08-02 Dai Nippon Printing Co., Ltd. Method for fluorescent image formation, print produced thereby and thermal transfer sheet thereof

Also Published As

Publication number Publication date
EP0368960A1 (fr) 1990-05-23
JPH02504015A (ja) 1990-11-22

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