US4822714A
Expired / Lapsed
US
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Transfer imaging system
Assignee: Eastman Kodak Co
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Filing: 1985-04-26
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Granted: 1989-04-18
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Expires: 2005-04-26
Abstract
Abstract A transfer imaging system is disclosed wherein images are formed by image-wise exposing a layer comprising a chromogenic material and pressure rupturable capsules containing, as an internal phase, a photosensitive composition. In a preferred embodiment, the chromogenic material is encapsulated with the photosensitive composition. Upon exposure and capsule rupture the chromogenic material is image-wise transferrable to a developer or copy sheet where the chromogenic material reacts with a developer to form an image. Preferred systems are sensitive to U.V. or blue light in the wavelength range of 380 to 480 nm.
Inventors
- 👤 Frederick W. Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:03
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/002; G03B; G03B2227/00; G03B2227/32; G03B2227/325; Y; Y10; Y10S; Y10S430/00; Y10S430/163; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987; Y10T428/2989
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
113 words
An imaging sheet useful in forming images by exposure-controlled, image-wise reaction of a chromogenic material and a developer, said sheet comprising: a support having a layer of microcapsules on one surface thereof, said microcapsules having discrete capsule walls which encapsulate an internal phase, said internal phase, including a photosensitive composition which undergoes a change in viscosity sufficient to control the release of the internal phase from said microcapsules, a chromogenic material associated with said microcapsules such that, upon image-wise exposing said layer of microcapsules to actinic radiation and subjecting said layer of microcapsules to a uniform rupturing force, said chromogenic material image-wise becomes available for reaction with a developer to form an image.
Claim 2
Dependent Claim
113 words
An imaging sheet useful in forming images by exposure-controlled, image-wise reaction of a chromogenic material and a developer, said sheet comprising: a support having a layer of microcapsules on one surface thereof, said microcapsules having discrete capsule walls which encapsulate an internal phase, said internal phase, including a photosensitive composition which undergoes a change in viscosity sufficient to control the release of the internal phase from said microcapsules, a chromogenic material associated with said microcapsules such that, upon image-wise exposing said layer of microcapsules to actinic radiation and subjecting said layer of microcapsules to a uniform rupturing force, said chromogenic material image-wise becomes available for reaction with a developer to form an image.
Claim 3
Dependent Claim
20 words
The imaging sheet of claim 1, wherein said chromogenic material is present in said internal phase with said photosensitive composition.
Claim 4
Dependent Claim
17 words
The imaging sheet of claim 2, wherein said chromogenic material is a substantially colorless electron donating compound.
Claim 5
Dependent Claim
17 words
The imaging sheet of claim 3, wherein said photosensitive composition is sensitive to ultraviolet and/or visible radiation.
Claim 6
Dependent Claim
15 words
The imaging sheet of claim 4, wherein said photosensitive composition includes an ethylenically unsaturated compound.
Claim 7
Dependent Claim
13 words
The imaging sheet of claim 5, wherein said photosensitive composition includes a photoinitiator.
Claim 8
Dependent Claim
31 words
The imaging sheet of claim 3, wherein said substantially colorless electronic donating compound is a compound having a lactone, a lactam, a sultone, a spiropyran, an ester, or an amido structure.
Claim 9
Dependent Claim
21 words
The imaging sheet of claim 5, wherein said discrete capsule wall is formed from a urea-formaldehyde resin or a melamine-formaldehyde resin.
Claim 10
Dependent Claim
45 words
An imaging sheet comprising a support having thereon pressure rupturable microcapsules encapsulating an internal phase including a radiation curable composition and a color precursor which forms a colored material upon contact with a co-reactant, said microcapsules having discrete capsule walls which encapsulate the internal phase.
Claim 11
Dependent Claim
45 words
An imaging sheet comprising a support having thereon pressure rupturable microcapsules encapsulating an internal phase including a radiation curable composition and a color precursor which forms a colored material upon contact with a co-reactant, said microcapsules having discrete capsule walls which encapsulate the internal phase.
Claim 12
Dependent Claim
62 words
A process comprising imagewise exposing an imaging sheet comprising a support having thereon pressure rupturable microcapsules encapsulating a radiation curable composition and a color precursor which forms a colored material upon contact with a co-reactant to immobilize the color precursor in the exposed areas; and rupturing said microcapsules in the unexposed areas in the presence of co-reactant to form a color image.
Claim 13
Dependent Claim
62 words
A process comprising imagewise exposing an imaging sheet comprising a support having thereon pressure rupturable microcapsules encapsulating a radiation curable composition and a color precursor which forms a colored material upon contact with a co-reactant to immobilize the color precursor in the exposed areas; and rupturing said microcapsules in the unexposed areas in the presence of co-reactant to form a color image.
Claim 14
Dependent Claim
15 words
The imaging sheet of claim 1 wherein said photosensitive composition includes a substituted coumarin compound.
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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) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |