Patent US4629675A successfully refreshed from Google Patents.
US4629675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for thermal development and transfer
Assignee: Fujifilm Holdings Corp
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Filing: 1984-04-02
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Granted: 1986-12-16
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Expires: 2004-04-02
Abstract
Abstract A photosensitive material containing a hydrophilic pigment is exposed to light to form a pigment pattern defining a particular image. The photosensitive material is brought into intimate contact with an image receiving material having a pigment fixing layer. The mutually contacting materials are heated so that the pigment may be transferred from the photosensitive material to the pigment fixing layer. A pigment diffusion assistant, is supplied to an area between the mutually contacting materials before they are heated for pigment transfer. The diffusion assistant spreads along a line along which the two materials are in contact with each other and promotes the transfer of the pigment.
Inventors
- 👤 Nobumitsu Takehara
- 👤 Kazuhiko Yanagihara
- 👤 Masahiro Ohnishi
- 👤 Isamu Hatanaka
- 👤 Shigeo Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:41
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49881; G03C8/00; G03C8/32; G03C8/34; G03C8/40; G03C8/4013; G03C8/4093
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
196 words
In a process for thermal development and transfer comprising steps of exposing to light a photosensitive material containing silver halide layers and a hydrophilic dye to form a pigment pattern defining a particular image, said pigment being transferable when heated; bringing said material into intimate contact with an image receiving material having a pigment fixing layer; and heating said photosensitive and image receiving materials to transfer said pigment of said pigment fixing layer, the improvement which comprises; supplying an aqueous pigment diffusion assistant to an area between said photsensitive and image receiving materials in such a manner that it can spread along a line along which said materials contact one another, and can assist the transfer of said pigment; and wherein said aqueous diffusion assistant is supplied through a pipe disposed between said materials and extending transversely thereof, said pipe having a single outlet opening located at a point approximately in the middle of its length such that said aqueous diffusion assistant is supplied from said opening one drop at a time to a point approximately in the middle of the width of said materials, each said drop spreading to form a bead between said materials.
Claim 2
Dependent Claim
196 words
In a process for thermal development and transfer comprising steps of exposing to light a photosensitive material containing silver halide layers and a hydrophilic dye to form a pigment pattern defining a particular image, said pigment being transferable when heated; bringing said material into intimate contact with an image receiving material having a pigment fixing layer; and heating said photosensitive and image receiving materials to transfer said pigment of said pigment fixing layer, the improvement which comprises; supplying an aqueous pigment diffusion assistant to an area between said photsensitive and image receiving materials in such a manner that it can spread along a line along which said materials contact one another, and can assist the transfer of said pigment; and wherein said aqueous diffusion assistant is supplied through a pipe disposed between said materials and extending transversely thereof, said pipe having a single outlet opening located at a point approximately in the middle of its length such that said aqueous diffusion assistant is supplied from said opening one drop at a time to a point approximately in the middle of the width of said materials, each said drop spreading to form a bead between said materials.
Claim 3
Dependent Claim
15 words
The process as set forth in claim 1, wherein said aqueous diffusion assistant is water.
Claim 4
Dependent Claim
32 words
The process as set forth in claim 1, wherein said aqueous diffusion assistant is a solution of a photgraphically useful substance selected from the group consisting of bases and surface active agents.
Claim 5
Dependent Claim
204 words
In a process for thermal development and transfer comprising steps of exposing to light a photosensitive material containing silver halide layers and a hydrophilic dye to form a pigment pattern defining a particular image, said pigment being transferable when heated; bringing said material into intimate contact with an image receiving material having a pigment fixing layer; and heating said photsensitive and image receiving materials to transfer said pigment of said pigment fixing layer, the improvement which comprises; supplying an aqueous pigment diffusion assistant to an area between said photsensitive and image receiving materials in such a manner that it can spread along a line along which said materials contact one another and can assist the transfer of said pigment; and wherein said aqueous diffusion assistant is supplied through a pipe disposed between said materials and extending transversely thereof, said pipe having a single outlet opening located at a free end thereof, remote from an end connected to a source of said aqueous diffusion assistant, such that said aqueous diffusion assistant is supplied from said opening one drop at a time to a pont approximately in the middle of the width of said materials, each said drop spreading to form a bead between said materials.
Claim 6
Dependent Claim
204 words
In a process for thermal development and transfer comprising steps of exposing to light a photosensitive material containing silver halide layers and a hydrophilic dye to form a pigment pattern defining a particular image, said pigment being transferable when heated; bringing said material into intimate contact with an image receiving material having a pigment fixing layer; and heating said photsensitive and image receiving materials to transfer said pigment of said pigment fixing layer, the improvement which comprises; supplying an aqueous pigment diffusion assistant to an area between said photsensitive and image receiving materials in such a manner that it can spread along a line along which said materials contact one another and can assist the transfer of said pigment; and wherein said aqueous diffusion assistant is supplied through a pipe disposed between said materials and extending transversely thereof, said pipe having a single outlet opening located at a free end thereof, remote from an end connected to a source of said aqueous diffusion assistant, such that said aqueous diffusion assistant is supplied from said opening one drop at a time to a pont approximately in the middle of the width of said materials, each said drop spreading to form a bead between said materials.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |