US3718462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manifold electrification process
Assignee: Xerox Corp
•
Filing: 1969-06-03
•
Granted: 1973-02-27
•
Expires: 1989-06-03
Abstract
Abstract A process for improving the imaging characteristics of electrically photosensitive material employed in the manifold layer transfer imaging process which comprises subjecting the material to an electric field of known polarity and then reversing the polarity of the field prior to the exposure of the imaging material to electromagnetic radiation to which it is sensitive.
Inventors
- 👤 I Krohn
- 👤 G Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:24
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
46 words
The process of claim 1 further including the step of modifying the polarity of said electric field subsequent to imagewise exposure of the imaging layer wherein said modification involves reversing or reducing said field whereby the exposed and unexposed portions of said imaging layer reverse adhesion.
Claim 2
Dependent Claim
43 words
The process of claim 1 further including the step of rendering said layer structurally fracturable in response to the combined effect of an applied electric field and exposure to electromagnetic radiation by applying thereto an activating amount of an activator for said layer.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the electrically photosensitive material is an organic material.
Claim 4
Dependent Claim
12 words
The process of claim 4 wherein the electrically photosensitive material is phthalocyanine.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein the electrically photosensitive material is dispersed in an insulating binder.
Claim 6
Dependent Claim
26 words
The method of claim 1 wherein the electric field is in the range of from about 2,000 volts per mil to about 10,000 volts per mil.
Claim 7
Dependent Claim
17 words
The process of claim 2 wherein the electrically photosensitive imaging material is dispersed in an insulating binder.
Claim 8
Dependent Claim
43 words
The process of claim 8 further including the step of rendering said layer structurally fracturable in response to the combined effect of an applied electric field and exposure to electromagnetic radiation by applying thereto an activating amount of an activator for said layer.
Claim 9
Dependent Claim
12 words
The process of claim 8 wherein the electrically photosensitive material is phthalocyanine.
Claim 10
Dependent Claim
27 words
The process of claim 1 wherein said donor and receiver sheets are electrically insulating and said electric fields are provided by electrostatic charges residing in said sheets.
Claim 11
Dependent Claim
51 words
The process of claim 1 further including the step of continuing exposure of said imaging layer after the exposed and unexposed portions of said imaging layer adhere to one of said donor and receiver sheets until the exposed and unexposed poRtions of the imaging layer reverse said adhesion to said sheets.
References Cited (Backward Citations)
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Cited
US3268331A
Cited
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Cited
US3438772A
Cited
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Cited
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Cited
US3412242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |