US3447989A - Method of thermographic reproduction - Google Patents
Method of thermographic reproduction Download PDFInfo
- Publication number
- US3447989A US3447989A US515082A US51508265A US3447989A US 3447989 A US3447989 A US 3447989A US 515082 A US515082 A US 515082A US 51508265 A US51508265 A US 51508265A US 3447989 A US3447989 A US 3447989A
- Authority
- US
- United States
- Prior art keywords
- heat
- transfer material
- sensitive
- sheet
- latent image
- 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
Links
- 238000000034 method Methods 0.000 title description 23
- 239000000463 material Substances 0.000 description 70
- 238000012546 transfer Methods 0.000 description 43
- 238000011161 development Methods 0.000 description 8
- 239000010419 fine particle Substances 0.000 description 8
- 238000004781 supercooling Methods 0.000 description 8
- 239000007787 solid Substances 0.000 description 7
- 150000004982 aromatic amines Chemical class 0.000 description 6
- 239000000178 monomer Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- UBUCNCOMADRQHX-UHFFFAOYSA-N N-Nitrosodiphenylamine Chemical compound C=1C=CC=CC=1N(N=O)C1=CC=CC=C1 UBUCNCOMADRQHX-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 229920006267 polyester film Polymers 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- RZXMPPFPUUCRFN-UHFFFAOYSA-N p-toluidine Chemical compound CC1=CC=C(N)C=C1 RZXMPPFPUUCRFN-UHFFFAOYSA-N 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 239000013526 supercooled liquid Substances 0.000 description 2
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 description 1
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 description 1
- GVPODVKBTHCGFU-UHFFFAOYSA-N 2,4,6-tribromoaniline Chemical compound NC1=C(Br)C=C(Br)C=C1Br GVPODVKBTHCGFU-UHFFFAOYSA-N 0.000 description 1
- DPJCXCZTLWNFOH-UHFFFAOYSA-N 2-nitroaniline Chemical compound NC1=CC=CC=C1[N+]([O-])=O DPJCXCZTLWNFOH-UHFFFAOYSA-N 0.000 description 1
- XJCVRTZCHMZPBD-UHFFFAOYSA-N 3-nitroaniline Chemical compound NC1=CC=CC([N+]([O-])=O)=C1 XJCVRTZCHMZPBD-UHFFFAOYSA-N 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- AFBPFSWMIHJQDM-UHFFFAOYSA-N N-methyl-N-phenylamine Natural products CNC1=CC=CC=C1 AFBPFSWMIHJQDM-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 229940018564 m-phenylenediamine Drugs 0.000 description 1
- BCIBCBXFXGKGBL-UHFFFAOYSA-N n-benzyl-n-phenylnitrous amide Chemical compound C=1C=CC=CC=1N(N=O)CC1=CC=CC=C1 BCIBCBXFXGKGBL-UHFFFAOYSA-N 0.000 description 1
- ATGUVEKSASEFFO-UHFFFAOYSA-N p-aminodiphenylamine Chemical compound C1=CC(N)=CC=C1NC1=CC=CC=C1 ATGUVEKSASEFFO-UHFFFAOYSA-N 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 1
- ODHXBMXNKOYIBV-UHFFFAOYSA-N triphenylamine Chemical compound C1=CC=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 ODHXBMXNKOYIBV-UHFFFAOYSA-N 0.000 description 1
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
- B41M5/398—Processes based on the production of stickiness patterns using powders
Definitions
- thermographic reproduction comprising the steps of preparing a heat-sensitive sheet having solid fine particles of a stable supercoolable monomer uniformly dispersed on a support, exposing the sheet and an original to heat to produce a latent image formed from the solid fine particles of the supercoolable material kept at its supercooled state, transferring the latent image to the surface of a transfer material and effecting development of the transfer material.
- This invention relates to a novel method of thermographic reproduction which utilizes the supercooling property of a stable supercoolable monomer.
- Copying sheets used in conventional methods of thermographic reproduction have invariably contained all the materials required for the reproduction of images by heat exposure. Due to the above fact, the conventional methods of thermographic reproduction have involved such defects that non-sensitized copying sheets can difiicultly be preserved and, if a sensitized sheet were heated by some sort of mistake, reaction takes place at the non-sensitized portions of the sheet with the result that a good contrast between the already existing image portions and the remaining non-sensitized portions is lost. If, therefore, a method is discovered by which a developer can solely be applied to image portions on a copying sheet, the stability of the copy can remarkably be improved.
- the present invention proposes a method of thermographic reproduction comprising the steps of preparing a heat-sensitive sheet having solid fine particles of a stable supercoolable material uniformly dispersed on a support, exposing said sheet and an original to heat to produce a latent image formed from the solid fine particles of the supercoolable material kept at its supercooled state, transferring said latent image to the surface of a transfer material, and effecting development on said transfer material.
- FIG. 1 is an explanatory view showing the successive steps of thermographic reproduction according to one form of the method of the invention.
- FIG. 2. is an explanatory view showing the successive steps of thermographic reproduction according to another form of the method of the invention.
- the method according to the present invention is broadly divided into two forms.
- image transfer is effected in simultaneous relation with heat exposure
- image transfer is effected in suitably delayed relation with respect to heat exposure.
- FIG. 1 representing the first form of the invention
- a transfer material 1 is brought into close contact with a heat-sensitive sheet comprising a heat-sensitive layer 3 formed from uniformly distributed fine particles of a supercoolable heat-sensitive monomer and a support 2 for the layer 3.
- the transfer material 1 and the heat-sensitive sheet are superposed on an original 5 carrying thereon an image 6, and infrared rays are irradiated onto the superposed sheet structure in a manner as shown by arrow 7 in FIG. 1a to melt those portions 4 of the heat-sensitive layer 3 on the heat-sensitive sheet which correspond to the image portions 6 on the original 5.
- the heat-sensitive material once heated to melt remains in its supercooled state and wets the corresponding surface portions of the transfer material 1.
- the latent image 4 formed from the supercooled heat-sensitive material can be transferred to the transfer material 1, as shown in FIG. lb. Thereafter the transfer material 1 may be subjected to a developing treatment as will be described later to obtain a visible image 8 as shown in FIG. 10.
- FIG. 2 represents the second form of the invention, that is, a case in which the heat exposure and image transfer are effected separately.
- the heat-sensitive sheet is first superposed on the original 5 and infrared rays are irradiated onto the superposed sheet structure to form a supercooled latent image 4 on the heat-sensitive seet, as shown in FIG. 2a.
- the heat-sensitive sheet is then brought into contact with the transfer material 1 as shown in FIG. 2b and is subsequently detached therefrom to transfer the supercooled latent image 4 to the transfer material 1 as shown in FIG. 20. Thereafter, the transfer material 1 may be subjected to a developing treatment to obtain a visible image 8 as shown in FIG. 2d.
- the transfer material must be a material of sheet-like structure which can transmit the infrared rays, but it will be known that, in case the manner of thermographic reproduction as shown in FIG. 2 or the back printing is employed, the transfer material may be of opaque nature and is not limited to the sheet-like structure, provided that the surface to-which the image is transferred can make a close contact with the heat-sensitive sheet.
- the developing treatment may broadly be divided into two forms.
- a developer such as a powder developer (toner) is externally applied to the transfer material
- a developer is preliminarily included in the transfer material.
- a powder developer is directly applied to the transferred latent image so as to be wetted by the supercooled heat-sensitive material in its liquid state and fixed thereto to give a visible image. If the transferred latent image has been urged from its supercooled liquid state to a solidified state due to a mechanical shock or the like caused during the transfer step, it is necessary to reheat the latent image to urge it again to its supercooled liquid state and then develop it.
- the dry developing process employed in the art of electrophotography is readily applicable.
- a heat-sensitive emulsion was prepared by heating 200 grams of triphenyl phosphate and a aqueous solution of gelatin at a temperature of about 70 C. and by emulsifying by an electrically driven agitator type emulsifier. This emulsion was coated on a cellulose triacetate film 50 thick and was allowed to dry to obtain a heatsensitive sheet. This heat-sensitive sheet was superposed on an original and, after heat exposure by a conventional heat exposure treatment, the heat-sensitive sheet Was detached from the original. Image transfer was then effected by superposing a polyester film 20 thick on that surface of the heat-sensitive sheet on which a latent image was formed. Then when the transferred image thus obtained was heated at a temperature of about 60 C. and the magnetic brush method was applied thereto, a visible image appeared on the polyester film.
- aromatic amines show-the superoooling property.
- aromatic amines those showing an especially stable superoooling property and suitable for the heat-sensitive material are diphenylamine, triphenylamine, p-toluidine, p-aminodiphenyl-amine, o-phenylene diamine, m-phenylenediamine, o-nitroaniline, m-nitroaniline, N-nitrosodiphenylamine, N-nitrosophenyl-benzylamine, and 2,4,6- tribromaniline.
- the aromatic amines easily react with various kinds of materials to make polymerization, condensation, cyclization or the like to form a colored compound. These reactions can effectively be applied to the method of reproduction according to the invention.
- Amine heat-sensitive Color former (to be added (1 henyl me Reddish brown. 2, l-dichloro-a-naphtliol. Bluish purple.
- a suitable material may be added to one of these materials to improve the supercooling property, or one of these materials may be dispersed in the form of solid fine particles in a material showing a stable supercooling property for thereby obtaining a supercoolable heat-sensitive composition.
- the heat-sensitive material is not limted to aromatic amines.
- EXAMPLE 2 A composition consisting of 10 grams of N-nitrosodiphenylamine and 100 cc. of a 5% aqueous solution of polyvinyl alcohol was heated at a temperature of C. and was emulsified by an emulsifier. This emulsion was coated on a polyester film 20;]. thick and was dried at room temperature to obtain a heat-sensitive sheet. Then, a lusterless tracing paper was impregnated with a solution consisting of 3 grams of 2,4-dichloro-a-naphthol dissolved into cc. of toluene and was allowed to dry to obtain a transfer material. Heat exposure was then made in the manner as shown in FIG. 1 by use of these heatsensitive sheet and transfer material. Then when the transfer material Was detached from the heat-sensitive sheet and was heated at a temperature of about 100 C., an image of bluish purple could be obtained. This heatsensitive sheet could withstand more than five repeated uses.
- a transfer material of sheet-like form having a slightly poor degree of visible ray transmission is employed and a latent image of a supercoolable heat-sensitive material is first formed on one face of the transfer material by the method of heat exposure as described previously.
- the similar treatment is repeated to form another latent image on the other face of the transfer material.
- the latent images on both faces of the transfer material can be made visible by the developing treatment as described previously.
- sufit ciently preservable copies can be obtained by dry developmg.
- thermographic reproduction comprising the steps of preparing a heat-sensitive sheet having solid fine particles of stable supercoolable monomer uniformly dispersed on a support, exposing said sheet and an original to heat to produce a latent image formed from the solid fine particles of the supercoolable monomer kept at its supercooled state, transferring said latent image to the surface of a transfer material, and effecting development on said transfer material.
- thermographic reproduction in which heat exposure is effected in a state that said transfer material is superposed on said heat-sensitive sheet and said heat-sensitive sheet is then detached from said transfer material.
- thermographic reproduction in which the latent image is first formed on said heat-sensitive sheet, said heat-sensitive sheet is then brought into close contact with said transfer material, and said heat-sensitive sheet is subsequently detached from said transfer material.
- thermographic reproduction in which a powder developer is used to develop the latent image obtained on said transfer material.
- thermographic reproduction in which said transfer material contains therein a material which develops a color when mixed 5 6 and heated to melt with a solid material showing a stable References Cited supercooling property.
- thermographic reproduction according UNITED STATES PATENTS to claim 5, in which said solid material showing the sta- 2,260,612 7/1966 Dulmage et 117 '25 ble supercooling property is an aromatic amine.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Color Printing (AREA)
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US515082A US3447989A (en) | 1965-12-20 | 1965-12-20 | Method of thermographic reproduction |
| GB54184/65A GB1128822A (en) | 1965-12-20 | 1965-12-21 | Method of thermographic reproduction |
| GB54185/65A GB1106199A (en) | 1965-12-20 | 1965-12-21 | Method of thermographic reproduction by use of powder developer |
| NL6516951A NL6516951A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1965-12-20 | 1965-12-27 | |
| DE1965M0067809 DE1546749B2 (de) | 1965-12-20 | 1965-12-27 | Thermographisches reproduktionsverfahren |
| NL6517000A NL6517000A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1965-12-20 | 1965-12-28 | |
| FR44475A FR1464297A (fr) | 1965-12-20 | 1965-12-31 | Procédé de reproduction thermo-graphique au moyen d'un révélateur en poudre |
| FR44477A FR1462647A (fr) | 1965-12-20 | 1965-12-31 | Procédé de reproduction thermo-graphique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US515082A US3447989A (en) | 1965-12-20 | 1965-12-20 | Method of thermographic reproduction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3447989A true US3447989A (en) | 1969-06-03 |
Family
ID=24049904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US515082A Expired - Lifetime US3447989A (en) | 1965-12-20 | 1965-12-20 | Method of thermographic reproduction |
Country Status (5)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3887392A (en) * | 1973-11-23 | 1975-06-03 | Gen Diode Corp | Material treatment method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4974941A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1972-11-18 | 1974-07-19 | ||
| DE3271978D1 (en) * | 1981-03-09 | 1986-08-21 | Minnesota Mining & Mfg | Method for providing permanent images |
| EP0099731B1 (en) * | 1982-07-16 | 1988-09-14 | Minnesota Mining And Manufacturing Company | Improved method for providing permanent images |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2260612A (en) * | 1938-02-02 | 1941-10-28 | Albert P Fall | Composite piston ring |
-
1965
- 1965-12-20 US US515082A patent/US3447989A/en not_active Expired - Lifetime
- 1965-12-21 GB GB54184/65A patent/GB1128822A/en not_active Expired
- 1965-12-21 GB GB54185/65A patent/GB1106199A/en not_active Expired
- 1965-12-27 DE DE1965M0067809 patent/DE1546749B2/de not_active Withdrawn
- 1965-12-27 NL NL6516951A patent/NL6516951A/xx unknown
- 1965-12-28 NL NL6517000A patent/NL6517000A/xx unknown
- 1965-12-31 FR FR44475A patent/FR1464297A/fr not_active Expired
- 1965-12-31 FR FR44477A patent/FR1462647A/fr not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2260612A (en) * | 1938-02-02 | 1941-10-28 | Albert P Fall | Composite piston ring |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3887392A (en) * | 1973-11-23 | 1975-06-03 | Gen Diode Corp | Material treatment method |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1106199A (en) | 1968-03-13 |
| NL6517000A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1967-06-29 |
| GB1128822A (en) | 1968-10-02 |
| DE1546749A1 (de) | 1970-09-10 |
| NL6516951A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1967-06-28 |
| FR1464297A (fr) | 1966-12-30 |
| FR1462647A (fr) | 1966-12-16 |
| DE1546749B2 (de) | 1971-12-30 |
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