US3119014A - Novel duplicating system - Google Patents

Novel duplicating system Download PDF

Info

Publication number
US3119014A
US3119014A US74925A US7492560A US3119014A US 3119014 A US3119014 A US 3119014A US 74925 A US74925 A US 74925A US 7492560 A US7492560 A US 7492560A US 3119014 A US3119014 A US 3119014A
Authority
US
United States
Prior art keywords
donor
sheet
imaging
coating
copy
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
US74925A
Other languages
English (en)
Inventor
Douglas A Newman
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.)
Columbia Ribbon and Carbon Manufacturing Co Inc
Original Assignee
Columbia Ribbon and Carbon Manufacturing Co Inc
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 Columbia Ribbon and Carbon Manufacturing Co Inc filed Critical Columbia Ribbon and Carbon Manufacturing Co Inc
Priority to US74925A priority Critical patent/US3119014A/en
Priority to CH1419461A priority patent/CH421155A/de
Priority to DEC25699A priority patent/DE1197478B/de
Priority to GB43992/61A priority patent/GB1013101A/en
Application granted granted Critical
Publication of US3119014A publication Critical patent/US3119014A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B41M5/38207—Contact thermal transfer or sublimation processes characterised by aspects not provided for in groups B41M5/385 - B41M5/395
    • 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
    • B41M5/38235—Contact thermal transfer or sublimation processes characterised by transferable colour-forming materials

Definitions

  • This invention is concerned with novel sheets for effecting the production of exact copies directly from an imaged original sheet through the use of infrared radiation.
  • thermographic production of clean, stable duplicate copies without the disadvantages attendant to prior art methods.
  • the invention consists in employing specially prepared donor sheets having on one surface a doner layer which is 3,119,014 Patented Jan. 21, 1964 preferably inconspicuous and is not subject to transferring under the effects of ordinary imaging pressure.
  • Such donor sheets therefore preferably have the appearance of ordinary untreated white paper sheets and may be typed upon or otherwise imaged on their untreated surface without disrupting the donor coating on the opposite surface.
  • the donor coating is so formulated as to be partially heat-meltable at temperatures generated by infrared radiation which is absorbed by images placed upon the untreated surface of the donor sheet.
  • infrared radiation which is absorbed by images placed upon the untreated surface of the donor sheet.
  • the nature of the copy sheets used according to this invention varies depending upon the formulation of the donor layer with which the copy sheet is to be used.
  • the copy sheet is preferably an untreated sheet of conventional paper stock, in which case the donor layer of the donor sheet contains all of the color-forming or imaging material.
  • the copy sheet may, however, comprise a specially coated or otherwise treated sheet which cooperates with the melted donor layer in forming colored images on the copy sheet surface.
  • the copy sheet is coated or otherwise treated with a critical element such as a complementary chemical, a dye component, a catalyst, a dye solvent or the like, which brings about the formation of colored images on the copy sheet when con tacted with the melted areas of the donor layer. It is advantageous in certain cases that the coating on the copy sheet also be heat-meltable so as to provide for quicker and denser imaging of the copy sheet.
  • FIGURE 1 is a diagrammatic fragmentary cross-section, to an enlarged scale, of a donor sheet according to the present invention, having a donor layer 15 and images 11.
  • FIG. 2 is a diagrammatic fragmentary cross-section, to an enlarged scale, of a conventional untreated copy sheet which has been imaged according to the present invention with duplicate images 15a.
  • FIG. 3 is a diagrammatic fragmentary cross-section, to an enlarged scale, of a treated copy sheet containing a complementary coating or impregnation 36 and which has been imaged according to the present invention with duplicate images 15b.
  • FIG. 4 is a diagrammatic view, to an enlarged scale, of a donor sheet and a copy sheet, separated for purposes of clarification, but superposed under the influence of infra red radiation according to the present process.
  • the present donor sheets comprise a suitable foundation 14 preferably paper, bearing a resinous donor coating 15.
  • the donor coating contains imaging materials which are substantially non-transferable in solid form under the effects of ordinary imaging pressures but which a become transferable when heated to their melting point.
  • This coating is preferably colorless or white so that its presence on the donor sheet is inconspicuous. This is important in cases where the donor sheet is to be used primarily as ordinary letter paper or the like.
  • the donor coating has a porous spongy structure in which a film-forming base material is present in substantially non-transferable form as the sponge or continuous network adhered to the foundation, while the imaging composition is present in discontinuous form, transferable when melted, and dispersed throughout the pores or vacuities of the supporting network.
  • the donor coating 15 is not pressure-transferable and will not exude the imaging materials under ordinary imaging pressure. It is likewise critical that the continuous phase or supporting network, which is comprised by the film-forming material, is heat-resistant and heat nontrausferable whereas the dispersed phase, comprising the imaging composition, is heat-meltable at a temperature of from 200 to 450 F. or above. Under the effects of such temperatures brought on by infrared radiation absorbed by images 11 present on the opposite surface of the donor sheet, an amount of the melted imaging composition exudes to the surface of the donor coating and wets the copy sheet which is in contact therewith. The copy sheet becomes wetted and thus imaged in areas corresponding to the imaged areas of the donor sheet as demonstrated by the accompanying drawing.
  • the present imaging composition is non-compatible with the film-forming base material employed so that the formed transfer layer is heterogeneous with the film-former and the imaging composition present at disunited and separate materials.
  • the imaging composition serves at least two functions in the transfer layer. Firstly, it disrupts the continuity of the film and prevents the formation of a continuous sealed film which would not be heat-sensitive. Secondly, it provides for the formation of heat-meltable color-forming microdroplets which are dispersed throughout the film network or sponge which is itself non-heat-meltable at the temperatures employed.
  • the imaging composition depends upon the nature of the copy sheets with which the donor sheet is to be used.
  • the imaging composition contains a suitable solid binder material such as a hard wax which has a melting point of 50 C. and above together with the imaging material which is preferably white or colorless.
  • the solid binder material must be a material which is not compatible with the film-forming base material and which, in its film-dispersed form, is not frangible or subject to being transferred under the effects of ordinary imaging pressures or temperatures, but which is heat-meltable at the temperatures generated by infrared radiation in the present process, namely temperatures ranging from about 150 F. to about 450 F. or higher.
  • Suitable binders include conventional hard waxes such as carnauba wax, microcrystalline wax, Carbowax 4000 and 6000, raw montan wax, beeswax and the like and mixtures thereof, with each other or with minor amounts of oils such as animal, vegetable or mineral oil, or with minor amounts of resinous materials such as Indopol H-300 and Paraplex AL-lll.
  • the imaging materials to be used vary greatly depending upon whether treated or untreated copy sheets are to be used with the donor sheet. If the donor sheet is to be used with untreated copy sheets, then the imaging materials carried by the donor layer must be capable of forming color per se under the influence of heat. If the donor sheet is to be used with specially treated copy sheets, then the imaging materials carried by either the donor layer or the copy sheet need not be capable of forming color per se but must be capable of forming color upon heat contact with each other.
  • Imaging material systems are the following: Colorless azo dye intermediates and coupling components which react with a change in the pH or in the presence of a catalyst as taught for instance by U.S. Patents Nos. 2,634,677, 2,748,024, and by my copending application Serial No. 732,461, now Patent No. 2,967,784, granted January 10, 1961.
  • the dye intermediate, the coupler or the pH adjusting agent or catalyst is present on the copy sheet;
  • Complementary chemical compounds which react to form a color when heated in the presence of each other, such chemicals being described for instance in U.S. Patent Nos. 2,663,657 and 2,813,042, and in my copending application Serial No. 838,922, now Patent No.
  • the coreactive chemicals may both be present in the donor layer in colorless unreacted form or, if desired, the donor and copy sheet may each contain one of the coreactive chemicals; Colorless nitrogen derivatives of dyestuffs such as crystal violet lactome which become colored when placed in adsorption contact with polar substances such as clay, silicon dioxide, magnesium carbonate or the like, as described in U.S. Reissue Patent No. 23,024 and U.S. Patent No. 2,443,092.
  • the polar substance is present as a coating on the copy sheet surface.
  • the imaging composition be colorless since excellent results have been obtained in cases where a colored dyestutf is used as the imaging material.
  • the copy sheets carry a heat-meltable coating containing Carbowax, cetyl alcohol, or the like, which functions as a dye solvent when liquefied, as taught by my copending application, Serial No. 36,951, now Patent Number 3,088,028, granted April 30, 1963.
  • Still another variation comprises the use of the above-named non-volatile dye solvents in the donor layer to be used together with copy sheets which carry a surface coating comprising substantially colorless or only slightly tinted undissolved dyestuffs or derivatives thereof such as crystal violet lactone and the like.
  • the essential discovery of this invention resides in the preparation of a donor sheet-copy sheet system which responds to heat development but not to pressure.
  • suitable film-forming materials having the critical properties outlined hereinbefore are the following: vinyl resins such as vinyl chloride, vinyl acetate and copolymers thereof, polyvinyl alcohol, polystyrene, polyvinylbutyrate, polyvinylidene chloride, polyacrylic acid; hydrocarbon polymers such as polyethylene and polypropylene; and hydrophilic or water-dispersible colloid materials including zein, gelatin, albumin, casein, carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, starch, gum arabic, tragacanth and other equivalent colloid materials.
  • vinyl resins such as vinyl chloride, vinyl acetate and copolymers thereof, polyvinyl alcohol, polystyrene, polyvinylbutyrate, polyvinylidene chloride, polyacrylic acid
  • hydrocarbon polymers such as polyethylene and polypropylene
  • hydrophilic or water-dispersible colloid materials including zein, gelatin, albumin, casein, carboxy
  • a suitable foundation sheet such as white paper is coated with the donor composition carried by a volatile solvent and then dried to evaporate the solvent and form the porous layer.
  • a suitable solvent depends of course upon the particular film-forming material employed, it being within the skill of the artisan to select a suitable solvent. For instance, when employing a vinyl resin or hydrocarbon polymer, then organic solvents such as ethyl acetate, methyl ethyl ketone, acetone, toluol and the like are suitable; when employing hydrophilic or water-clispersible colloid materials, then water is a suitable volatile solvent.
  • Example 1 Donor composition:
  • the copy sheet to be used with a donor sheet carrying the above composition, may be impregnated with a suitable chemical salt, complementary to gallic acid, such as ferric chloride.
  • a suitable chemical salt complementary to gallic acid, such as ferric chloride.
  • the copy sheet is coated with a composition including the iron salt, a humectant such as glycerine and a binder such as cellulose acetate or the like, as disclosed in US. Patent No. 2,872,863 and as exemplified by FIG. 3 of the drawing.
  • the copy sheet to be used in connection with a donor sheet carrying the above composition, has a surface coating of clay or the like, as disclosed in US. Reissue Patent No. 23,024, or a coating comprising a solid dye solvent such as cetyl alcohol, Carbowax, stearic acid, etc. as taught by copending application, Serial No. 36,951, now
  • Casein 10 Ammonium hydroxide (28% aqueous) (hardening agent) Carnauba wax 10 Montan wax 8 Paraplex AL-111 2 Crystal Violet 18 Water 50
  • Ammonium hydroxide (28% aqueous) (hardening agent) Carnauba wax 10 Montan wax 8 Paraplex AL-111 2 Crystal Violet 18 Water 50
  • a donor sheet adapted for the production of duplicate copies of infrared radiation-absorbing heat-gencrating images carried on one surface thereof which comprises a flexible foundation sheet having on one surface thereof a donor coating which is substantially non-transferable under the effects of ordinary imaging pressure, said coating comprising a solid hydrophilic colloid base material and an imaging composition containing a solid wax binder, which is non-compatible with said base material and which is meltable at the temperatures generated by said images under the elfects of infrared radiation, and a quantity of imaging material.
  • a donor sheet comprising a flexible foundation sheet having on one surface thereof images which absorb infrared radiation and convert it to heat and on the opposite surface thereof a donor coating which is substantially non-transferable under the effect of ordinary imaging pressure, said coating comprising a solid film-forming base material and an imaging composition containing a solid wax binder material, which is non-compatible with said film-forming material and which is meltable at the temperatures generated by said images under the effects of infrared radiation, and a quantity of imaging material.
  • the method of preparing a donor sheet which comprises applying to one surface of a flexible foundation sheet a coating composition comprising a film-forming base material, a solid wax binder material which is noncompatible with said film-forming material, a quantity of imaging material and a volatile solvent and drying said coating by evaporating the volatile solvent to form a coating which is substantially non-transferable under the effects of ordinary imaging pressure but which exudes said wax binder material and said imaging material when heated to temperatures in excess of about F.
  • the method of preparing a donor sheet which comprises applying to one surface of a flexible foundation sheet a coating composition comprising a resinous base material, a wax binder which is non-compatible with said base material, a quantity of imaging material and a volatile organic solvent and drying said coating by evaporating the volatile solvent to form a coating which is substantially non-transferable under the effects of ordinary imaging pressure but which exudes said binder and said imaging material when heated to temperatures in excess of about 150 F.
  • the method of preparing a donor sheet which comprises applying to one surface of a flexible foundation sheet a coating composition comprising a hydrophilic colloid base material, a wax binder which is non-compatible with said base material, a quantity of imaging material and an aqueous solvent and drying said coating by evaporating the volatile solvent to form a coating which is substantially non-transferable under the effects of ordinary imaging pressure but which exudes said binder and said imaging material when heated to temperatures in excess of about 150 F.
  • hydrophilic colloid base material comprises zein

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Color Printing (AREA)
US74925A 1960-12-09 1960-12-09 Novel duplicating system Expired - Lifetime US3119014A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US74925A US3119014A (en) 1960-12-09 1960-12-09 Novel duplicating system
CH1419461A CH421155A (de) 1960-12-09 1961-12-07 Ubertragungsblatt für die Herstellung von Kopien
DEC25699A DE1197478B (de) 1960-12-09 1961-12-08 UEbertragungsblatt fuer thermographische Vervielfaeltigungen
GB43992/61A GB1013101A (en) 1960-12-09 1961-12-08 Improvements in or relating to duplicating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74925A US3119014A (en) 1960-12-09 1960-12-09 Novel duplicating system

Publications (1)

Publication Number Publication Date
US3119014A true US3119014A (en) 1964-01-21

Family

ID=22122476

Family Applications (1)

Application Number Title Priority Date Filing Date
US74925A Expired - Lifetime US3119014A (en) 1960-12-09 1960-12-09 Novel duplicating system

Country Status (4)

Country Link
US (1) US3119014A (de)
CH (1) CH421155A (de)
DE (1) DE1197478B (de)
GB (1) GB1013101A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246148A (en) * 1962-03-30 1966-04-12 Gevaert Photo Prod Nv Method for the production of thermographic copies from an electrostatic powder image
US3252413A (en) * 1964-07-22 1966-05-24 Sharkey Melvin Heat duplicating products and process
EP0171974A3 (en) * 1984-08-13 1987-05-06 General Company Limited Multi-type heat-sensitive transferring medium

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6110490A (ja) * 1984-06-26 1986-01-17 Fuji Kagakushi Kogyo Co Ltd 多数回使用型熱転写記録媒体
DE3520308A1 (de) * 1985-06-07 1986-12-11 Pelikan Ag, 3000 Hannover Verfahren zur herstellung eines thermofarbbandes fuer den thermotransferdruck und das danach erhaeltliche thermofarbband
JPS6213387A (ja) * 1985-07-12 1987-01-22 Canon Inc 感熱転写記録方法
US4783360A (en) * 1985-07-22 1988-11-08 Canon Kabushiki Kaisha Thermal transfer material
GB2178553B (en) * 1985-07-29 1990-01-04 Canon Kk Thermal transfer material
US4943509A (en) * 1987-02-27 1990-07-24 Brother Kogyo Kabushiki Kaisha Recording system having a coating device for coating recording medium or photosensitive medium with developer material reacting with color precursor
JPS63236682A (ja) * 1987-03-26 1988-10-03 Brother Ind Ltd 記録媒体
JPH01174485A (ja) * 1987-12-29 1989-07-11 Brother Ind Ltd 顕色剤

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2769391A (en) * 1951-11-14 1956-11-06 Dick Co Ab Method of manufacturing imaged hectograph spirit master
US2800077A (en) * 1952-03-27 1957-07-23 Dick Co Ab Planographic printing plates and methods for manufacturing same
USRE24554E (en) * 1951-02-02 1958-10-21 Heat-sensitive copying-paper
US2939009A (en) * 1956-02-01 1960-05-31 Jack M Tien Thermotransfer duplicating process

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1049399B (de) * 1950-11-01 1959-01-29 A. B. Dick Company, Nilcs, IU. (V. St. A.) Schablonenblatt mit Gcwebeunterlage und schablonierbarem Überzug für das Vervielfältigen mittels Wasser- oder Emulsionsfarben

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE24554E (en) * 1951-02-02 1958-10-21 Heat-sensitive copying-paper
US2769391A (en) * 1951-11-14 1956-11-06 Dick Co Ab Method of manufacturing imaged hectograph spirit master
US2800077A (en) * 1952-03-27 1957-07-23 Dick Co Ab Planographic printing plates and methods for manufacturing same
US2939009A (en) * 1956-02-01 1960-05-31 Jack M Tien Thermotransfer duplicating process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246148A (en) * 1962-03-30 1966-04-12 Gevaert Photo Prod Nv Method for the production of thermographic copies from an electrostatic powder image
US3252413A (en) * 1964-07-22 1966-05-24 Sharkey Melvin Heat duplicating products and process
EP0171974A3 (en) * 1984-08-13 1987-05-06 General Company Limited Multi-type heat-sensitive transferring medium

Also Published As

Publication number Publication date
DE1197478B (de) 1965-07-29
GB1013101A (en) 1965-12-15
CH421155A (de) 1966-09-30

Similar Documents

Publication Publication Date Title
JPS6020198B2 (ja) 感熱性多数回転写材
JPH041716B2 (de)
US3119014A (en) Novel duplicating system
US3458339A (en) Transfer sheets for duplicating
US3149563A (en) Stencil-forming sheet material assembly
US3088028A (en) Duplication with heat-meltable solvent for hectographic coloring material
JPS61273989A (ja) 感熱転写シ−ト
US3207621A (en) Novel hectograph transfer sheet and process
US3922438A (en) Supercoated transfer elements and process for preparing and using same
US3129661A (en) Novel duplicating processes
US3109748A (en) Thermographic reproduction composite wherein a calcium carbonate layer is effected by a transferred heat-sensitive material
US3788875A (en) Transfer copy process and material
US3404995A (en) Hectograph products and processes
JPS6040295A (ja) 感熱性多数回転写材
JPH0441918B2 (de)
US5952107A (en) Backcoat for thermal transfer ribbons
JPH0254796B2 (de)
JPS6063192A (ja) 熱転写記録材
US3442680A (en) Pressure-sensitive transfer elements and processes
US3252413A (en) Heat duplicating products and process
JPS6056594A (ja) 感熱熱転写記録材
JPS6040297A (ja) 感熱性多数回転写材
US5744226A (en) Multilayerd thermal transfer medium for matte finish printing
US3226288A (en) Heat-sensitive copying sheet
JPH0448356B2 (de)