Patent US4252890A successfully refreshed from Google Patents.
US4252890A
Expired / Lapsed
US
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Imaging system which agglomerates particulate material
Assignee: Xerox Corp
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Filing: 1977-10-26
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Granted: 1981-02-24
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Expires: 1997-10-26
Abstract
Abstract An imaging system wherein a migration-type imaging member comprising a softenable layer containing agglomerable migration marking material is provided, and the member is exposed to an image pattern of electromagnetic radiation of sufficient energy to cause a simultaneous imagewise migration at least in depth in the softenable layer and agglomeration of the agglomerable migration marking material in the imagewise exposed areas of the imaging member. In another embodiment, a microscopically discontinuous layer of imaging material on a stable substrate is agglomeration or evaporation imaged by the inventive system.
Inventors
- 👤 Werner E. L. Haas
- 👤 James E. Adams
- 👤 Bela Mechlowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:09
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/36; G; G03; G03B; G03B15/00; G03C; G03C1/00; G03C1/705; G03C5/00; G03C5/56; Y; Y10; Y10S; Y10S430/00; Y10S430/145; Y10S430/146; Y10S430/165
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
113 words
An imaging method comprising: providing an imaging member comprising a stable substrate having a particulate discontinuous layer of agglomerable imaging material on one surface of said substrate, wherein the particles have an average size of not greater than about two microns, and imagewise exposing said member to an image pattern of electromagnetic radiation of sufficient energy to cause the agglomerable imaging material in the imagewise exposed areas to agglomerate and fuse whereby the total cross-sectional area of the exposed, fused imaging material is less than the total cross-sectional area of the unexposed, non-fused imaging material, thereby substantially reducing the visibility of said exposed material and providing an imagewise contrast with the unexposed material.
Claim 2
Dependent Claim
113 words
An imaging method comprising: providing an imaging member comprising a stable substrate having a particulate discontinuous layer of agglomerable imaging material on one surface of said substrate, wherein the particles have an average size of not greater than about two microns, and imagewise exposing said member to an image pattern of electromagnetic radiation of sufficient energy to cause the agglomerable imaging material in the imagewise exposed areas to agglomerate and fuse whereby the total cross-sectional area of the exposed, fused imaging material is less than the total cross-sectional area of the unexposed, non-fused imaging material, thereby substantially reducing the visibility of said exposed material and providing an imagewise contrast with the unexposed material.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein said discontinuous layer of imaging material comprises particles of imaging material having average particle size not greater than about 1 micron.
Claim 4
Dependent Claim
28 words
The method of claim 2 wherein said discontinuous layer of imaging material comprises particles of said imaging material having average particle size not greater than about 0.5 microns.
Claim 5
Dependent Claim
20 words
The method of claim 2 wherein said particles of imaging material have particle-to-particle spacings not greater than about 1/2 micron.
Claim 6
Dependent Claim
29 words
The method of claim 1 wherein said imaging material comprises a material selected from the group consisting of: selenium, tellurium, arsenic, zinc, sulfur, gallium, cobalt tricarbonyl, and mixtures thereof.
Claim 7
Dependent Claim
12 words
The method of claim 1 wherein said imaging material comprises amorphous selenium.
Claim 8
Dependent Claim
37 words
The method of claim 1 wherein the step of imagewise exposing said member comprises exposing imagewise portions of said member to electromagnetic radiation of energy in the range between about 0.001 and about 0.3 joules/cm 2 .
Claim 9
Dependent Claim
23 words
The method of claim 7 wherein said electromagnetic radiation is of wavelength in the range between about 2,000 A and about 26,000 A.
Claim 10
Dependent Claim
28 words
The method of claim 7 wherein the imagewise exposure is carried out for a time period in the range between about 10 microseconds and about 10 5 microseconds.
Claim 11
Dependent Claim
18 words
The method of claim 7 wherein the source of said electromagnetic radiation is a Xenon gas discharge lamp.
Claim 12
Dependent Claim
15 words
The method of claim 7 wherein the source of said electromagnetic radiation is a laser.
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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) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |