US4981834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-color transfer printing medium
Assignee: Seiko Instruments Inc
•
Filing: 1989-01-03
•
Granted: 1991-01-01
•
Expires: 2009-01-03
Abstract
Abstract A multi-color transfer printing medium is comprised of at least two different kinds of microcapsules having a porous membrane and disposed on a substrate. Each kind of microcapsules contains a different electron-donating chromogenic material effective to produce a different color tone, and a different light-absorbing material effective to absorb a light of different wavelength. In use, the multi-color transfer printing medium is superposed with a color developing sheet coated with electron-accepting material, and is irradiated with lights of different wavelengths to transfer-print color image on the developing sheet to thereby obtain the multi-color image with a simple process at high speed.
Inventors
- 👤 Hiromichi Sakojiri
- 👤 Hiroshi Takahashi
- 👤 Fumiharu Iwasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:52
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/38235; B41M5/28; B41M5/287; B41M5/34; B41M5/345
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
104 words
A primary medium for use in developing a color image on a secondary medium coated with a layer of electron-accepting material, comprising: a substrate positionable on the secondary medium; and microcapsules arranged on the substrate in opposed relation to the layer of electron-accepting material, each of the individual microcapsules containing an electron-donating chromogenic material and a light-absorbing material effective to absorb light to generate heat for releasing the electron-donating chromogenic material from the microcapsule by the generated heat so that the released electron-donating chromogenic material comes into contact and reacts with the electron-accepting material to thereby develop a color image on the secondary medium.
Claim 2
Dependent Claim
104 words
A primary medium for use in developing a color image on a secondary medium coated with a layer of electron-accepting material, comprising: a substrate positionable on the secondary medium; and microcapsules arranged on the substrate in opposed relation to the layer of electron-accepting material, each of the individual microcapsules containing an electron-donating chromogenic material and a light-absorbing material effective to absorb light to generate heat for releasing the electron-donating chromogenic material from the microcapsule by the generated heat so that the released electron-donating chromogenic material comes into contact and reacts with the electron-accepting material to thereby develop a color image on the secondary medium.
Claim 3
Dependent Claim
45 words
A primary medium according to claim 1; including at least two different kinds of microcapsules, each kind of microcapsules containing a different light-absorbing material effective to absorb a different wavelength of light, and a different electron-donating chromogenic material reactive to produce a different color tone.
Claim 4
Dependent Claim
24 words
A primary medium according to claim 1; wherein the microcapsules have a porous membrane effective to facilitate the release of the electron-donating chromogenic material.
Claim 5
Dependent Claim
106 words
A primary medium for use in forming a color image on a secondary medium containing electron-accepting material, the primary medium comprising: a layer of microcapsules; and means supporting the layer of microcapsules to enable the microcapsules to be positioned in opposed relation to the electron-accepting material of the secondary medium; each of the microcapsules containing electron-donating chromogenic material effective when released from the microcapsule to react with the electron-accepting material to produce a given color tone, and a light-absorbing material effective to selectively absorb electromagnetic radiation of a given wavelength to generate sufficient heat energy to effect release of the electron-donating chromogenic material from the microcapsule.
Claim 6
Dependent Claim
106 words
A primary medium for use in forming a color image on a secondary medium containing electron-accepting material, the primary medium comprising: a layer of microcapsules; and means supporting the layer of microcapsules to enable the microcapsules to be positioned in opposed relation to the electron-accepting material of the secondary medium; each of the microcapsules containing electron-donating chromogenic material effective when released from the microcapsule to react with the electron-accepting material to produce a given color tone, and a light-absorbing material effective to selectively absorb electromagnetic radiation of a given wavelength to generate sufficient heat energy to effect release of the electron-donating chromogenic material from the microcapsule.
Claim 7
Dependent Claim
57 words
A primary medium according to claim 4; wherein the layer of microcapsules includes at least two different kinds of microcapsules, each different kind of microcapsule containing a different electron-donating chromogenic material reactive with the electron-accepting material to produce a different color tone, and a different light-absorbing material effective to selectively absorb electromagnetic radiation of a different wavelength.
Claim 8
Dependent Claim
18 words
A primary medium according to claim 5; wherein the layer of microcapsules includes three different kinds of microcapsules.
Claim 9
Dependent Claim
30 words
A primary medium according to claim 6; wherein the three different kinds of microcapsules respectively have three different electron-donating chromogenic materials corresponding respectively to color tones of three primary colors.
Claim 10
Dependent Claim
15 words
A primary medium according to claim 4; wherein the microcapsules each have a porous membrane.
References Cited (Backward Citations)
US3301439A
Cited
US4501809A
Cited
US4529992A
Cited
US4644376A
Cited
US4576891A
Cited
US4760048A
Cited
US4758495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |