Patent US5004667A successfully refreshed from Google Patents.
US5004667A
Expired / Lapsed
US
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Photosensitive material, and image formation process and image formation apparatus using same
Assignee: Canon Inc
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Filing: 1988-12-09
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Granted: 1991-04-02
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Expires: 2008-12-09
Abstract
Abstract A photosensitive material and comprises a photosensitive and heat-developable element and a polymer, and is capable of being endowed with stickness by a change of pH value or being subjected to exposure and heating. An image formation process comprises the steps of subjecting to imagewise exposure the photosensitive material, heating the photosensitive material, electrifying the photosensitive material, and transferring the iamgewise exposed or unexposed portion of the photosensitive material. The photosensitive and heat-developable element comprises a least a photosensitive silver salt and a reducing agent and the polymer has a cross-linked structure.
Inventors
- 👤 Kozo Arahara
- 👤 Tetsuro Fukui
- 👤 Hiroshi Fukumoto
- 👤 Masato Katayama
- 👤 Yoshio Takasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:39
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/40; G03C8/4013; G03C8/4093
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
124 words
An image formation process comprising the steps of: (a) subjecting a non-adhesive photosensitive material capable of becoming adhesive in response to light exposure and heat development comprising a silver halide, an organic silver salt, a reducing agent and a polymer which is capable of becoming adhesive at room temperature due to pH change, to imagewise exposure to form a latent image; (b) heating said photosensitive material to promote a change in the pH value of said polymer to form an adhesive pattern of said photosensitive material corresponding to said imagewise exposed pattern; (c) electrifying said photosensitive material to amplify said change in the pH value; and (d) transferring said adhesive pattern corresponding to said imagewise exposed pattern of said material to a transferring medium.
Claim 2
Dependent Claim
124 words
An image formation process comprising the steps of: (a) subjecting a non-adhesive photosensitive material capable of becoming adhesive in response to light exposure and heat development comprising a silver halide, an organic silver salt, a reducing agent and a polymer which is capable of becoming adhesive at room temperature due to pH change, to imagewise exposure to form a latent image; (b) heating said photosensitive material to promote a change in the pH value of said polymer to form an adhesive pattern of said photosensitive material corresponding to said imagewise exposed pattern; (c) electrifying said photosensitive material to amplify said change in the pH value; and (d) transferring said adhesive pattern corresponding to said imagewise exposed pattern of said material to a transferring medium.
Claim 3
Dependent Claim
41 words
The image formation process according to claim 1, wherein said transfer step has a step of bringing the photosensitive material and transferring medium into pressure contact, and a step of peeling said photosensitive material and transferring medium after the pressure contact.
Claim 4
Dependent Claim
17 words
The photosensitive material according to claim 1, wherein said polymer is a polymer having a cross-linked structure.
Claim 5
Dependent Claim
18 words
The photosensitive material according to claim 3, wherein said polymer having a cross-linked structure is a hydrophilic polymer.
Claim 6
Dependent Claim
15 words
The photosensitive material according to claim 1, wherein said photosensitive material contains a cross-linking agent.
Claim 7
Dependent Claim
17 words
The photosensitive material according to claim 5, wherein said cross-linking agent is a boric acid source compound.
Claim 8
Dependent Claim
14 words
The photosensitive material according to claim 1, wherein said polymer is an electrolytic polymer.
Claim 9
Dependent Claim
16 words
The photosensitive material according to claim 7, wherein said electrolytic polymer is an amphoterically electrolytic polymer.
Claim 10
Dependent Claim
15 words
The photosensitive material according to claim 1, wherein said photosensitive material contains a water-absorbable powder.
Claim 11
Dependent Claim
16 words
The photosensitive material according to claim 9, wherein said water-absorbable powder is a water-containing silicate mineral.
Claim 12
Dependent Claim
15 words
The photosensitive material according to claim 1, wherein said photosensitive material has a conductive substrate.
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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) | 1994-04-01 | 1994-10-01 | 1995-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-01 | 1998-10-01 | 1999-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-01 | 2002-10-01 | 2003-04-02 | $7700.00 | Window Closed / Lapsed |