Patent US3950167A successfully refreshed from Google Patents.
US3950167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging system
Assignee: Xerox Corp
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Filing: 1973-09-26
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Granted: 1976-04-13
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Expires: 1993-09-26
Abstract
Abstract A system for "capturing" charge within the structure of an electrophotographic imaging member in the imagewise exposed areas and thereby creating an electrostatic latent image in the imagewise exposed areas which in preferred embodiments of discrete non-touching particles of electrically photosensitive material stands up better against time, heat and light. Said imaging member is comprised of an insulating layer and electrically porous, mechanically discontinuous electrically photosensitive layer contacting said insulating layer. The process includes (1) charging, (2) imagewise exposure, and (3) promoting the dissipation of charge from the areas which are relatively nonexposed compared to the exposed areas, leaving behind an electrostatic latent image in the imagewise exposed areas. The electrostatic image thus created may be used or developed by any suitable technique other than by causing imagewise migration of said electrically photosensitive material.
Inventors
- 👤 Simpei Tutihasi
- 👤 William L. Goffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:32
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0644; G03G5/0646; G03G5/0653; G03G13/00; G03G13/22; G03G5/0664; G03G5/0675; G03G5/0677; G03G5/0679; G03G5/0696; G03G5/08; G03G5/082; G03G5/087
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
96 words
An imaging method comprising the steps of: a. providing an imaging member comprising a nonmigrating electrically porous layer of electrically photosensitive material contacting an insulating layer; b. charging said imaging layer; c. imagewise exposing said member to activating radiation for said electrically porous layer; d. promoting the dissipation of charge in the nonexposed areas relative to the imagewise exposed areas and the capture of charge in the exposed areas, whereby an electrostatic latent image with higher surface potential in imagewise exposed areas is created; and e. using said electrostatic latent image to form a visible image.
Claim 2
Dependent Claim
96 words
An imaging method comprising the steps of: a. providing an imaging member comprising a nonmigrating electrically porous layer of electrically photosensitive material contacting an insulating layer; b. charging said imaging layer; c. imagewise exposing said member to activating radiation for said electrically porous layer; d. promoting the dissipation of charge in the nonexposed areas relative to the imagewise exposed areas and the capture of charge in the exposed areas, whereby an electrostatic latent image with higher surface potential in imagewise exposed areas is created; and e. using said electrostatic latent image to form a visible image.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the charging of step (b) is negative.
Claim 4
Dependent Claim
18 words
The method of claim 2 wherein the image forming step of part (e) includes the application of toner.
Claim 5
Dependent Claim
28 words
The method of claim 1 wherein the promoting of dissipation of charge of step (d) comprises dark storage of the imagewise exposed imaging member for at least seconds.
Claim 6
Dependent Claim
28 words
The method of claim 1 wherein the promoting of dissipation of charge of step (d) comprises gently heating said imaging member to a degree insufficient to cause migration.
Claim 7
Dependent Claim
28 words
The method of claim 3 wherein the promoting of dissipation of charge of step (d) comprises gently heating said imaging member to a degree insufficient to cause migration.
Claim 8
Dependent Claim
27 words
The method of claim 2 further comprising the step of: erasing said electrostatic latent image by subjecting said imaging member to a uniform positive charge and heating.
Claim 9
Dependent Claim
32 words
The method of claim 1 wherein the charging of step (b) is positive and the promoting of dissipation of charge of step (d) comprises the application of vapor to the imaging member.
Claim 10
Dependent Claim
29 words
The method of claim 1 wherein the image forming step of part (e) includes the application of toner and the further step of: removing the photosensitive layer by transparentization.
Claim 11
Dependent Claim
21 words
The imaging method of claim 1 wherein said electrically porous layer of electrically photosensitive material is comprised of discrete, non-touching particles.
Claim 12
Dependent Claim
24 words
The method of claim 1 wherein the promoting of dissipation of charge of step (d) comprises softening to a degree insufficient to cause migration.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |