US4857501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacturing method of a heat sensitive recording material
Assignee: Fujifilm Holdings Corp
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Filing: 1987-12-28
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Granted: 1989-08-15
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Expires: 2007-12-28
Abstract
Abstract This invention discloses a manufacturing method of a heat sensitive material having a transparent heat sensitive layer comprised of controlling transparency of heat sensitive layer by coating a composition containing an emulsified dispersion prepared by dispersing a color developer dissolved into an organic solvent slightly soluble or insoluble in water and microcapsules containing at least a colorless or light colored electron donating dye precursor (core material) and then drying the coat, in which a refractive index of the core material and that of an oil phase of the color developer dispersion are properly adjusted. When providing a transparent heat sensitive layer obtained by the above method on a printed support, a printed matter can be seen through the heat sensitive layer.
Inventors
- 👤 Toshimasa Usami
- 👤 Akihiro Shimomura
- 👤 Sumitaka Tatsuta
- 👤 Seiji Hatakeyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:09
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3375; B41M5/124; B41M5/165; B41M5/1655; B41M5/323; B41M5/327; B41M5/3275; B41M5/333; B41M5/3333; B41M5/3335; B41M5/3377; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24876
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
91 words
Heat sensitive recording materials comprising a support having thereon at least one heat sensitive layer containing a colorless or light colored electron donating dye precursor enclosed in a microcapsule and a color developer, which recording material is manufactured by a method which comprises coating a composition containing (a) an emulsified dispersion prepared by dissolving said color developer in an organic solvent slightly soluble or insoluble in water and dispersing said developer containing solvent, and (b) said microcapsules on a support then drying the coat to provide a transparent heat sensitive layer.
Claim 2
Dependent Claim
91 words
Heat sensitive recording materials comprising a support having thereon at least one heat sensitive layer containing a colorless or light colored electron donating dye precursor enclosed in a microcapsule and a color developer, which recording material is manufactured by a method which comprises coating a composition containing (a) an emulsified dispersion prepared by dissolving said color developer in an organic solvent slightly soluble or insoluble in water and dispersing said developer containing solvent, and (b) said microcapsules on a support then drying the coat to provide a transparent heat sensitive layer.
Claim 3
Dependent Claim
17 words
Heat sensitive recording materials as claimed in claim 1, wherein said support is made of a paper.
Claim 4
Dependent Claim
25 words
Heat sensitive recording materials as claimed in claim 1, wherein a printing on the support has been carried out using one or more aqueous ink.
Claim 5
Dependent Claim
30 words
Heat sensitive recording materials as claimed in any one of claims 1, to 3, wherein said transparent heat sensitive layer has a sufficient heat sensitivity to record using thermal head.
Claim 6
Dependent Claim
43 words
A heat sensitive recording material as in claim 1, wherein said refractive index of a component enclosed in the microcapsule is within the range of 0.99-1.01 times that of a nonvolatile oil phase of a dispersion comprising the developer and the organic solvent.
Claim 7
Dependent Claim
129 words
Heat sensitive recording materials comprising a printed support having thereon at least one transparent heat sensitive layer, wherein said heat sensitive layer contains a colorless or light colored electron donating dye precursor enclosed in a microcapsule and a color developer, and wherein said transparent heat sensitive layer is produced by a process comprising dispersing said microcapsules and said color developer in an organic solvent slightly soluble or insoluble in water to form an emulsified dispersion, wherein the refractive index of the component enclosed in the microcapsule is adjusted to within a range of 0.97-1.03 times of that of the nonvolatile oil phase of a dispersion comprising the developer and the organic solvent, coating said dispersion on a support, and drying the coat to provide a transparent heat sensitive layer.
Claim 8
Dependent Claim
129 words
Heat sensitive recording materials comprising a printed support having thereon at least one transparent heat sensitive layer, wherein said heat sensitive layer contains a colorless or light colored electron donating dye precursor enclosed in a microcapsule and a color developer, and wherein said transparent heat sensitive layer is produced by a process comprising dispersing said microcapsules and said color developer in an organic solvent slightly soluble or insoluble in water to form an emulsified dispersion, wherein the refractive index of the component enclosed in the microcapsule is adjusted to within a range of 0.97-1.03 times of that of the nonvolatile oil phase of a dispersion comprising the developer and the organic solvent, coating said dispersion on a support, and drying the coat to provide a transparent heat sensitive layer.
References Cited (Backward Citations)
US4577205A
Cited
US4711874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |