Patent US2901849A successfully refreshed from Google Patents.
Patent US4707110A successfully refreshed from Google Patents.
US3891990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging process using donor material
Assignee: Xerox Corp
•
Filing: 1973-06-27
•
Granted: 1975-06-24
•
Expires: 1993-06-27
Abstract
Abstract A duplicating process wherein a charge pattern is formed on the surface of an insulating member. The insulating member is backed by a conductive member and is placed in an electroded system. The opposing electrode is a conductive member having on its surface in imagewise configuration a layer of a material which upon application of electrical field alone will generate charge carriers. An insulating layer is provided between the imagewise generating material and the insulating member. Application of electrical field causes the formation of a charge pattern on the surface of the insulating member corresponding to the imagewise charge carrier generating material. The charge pattern may then be rendered visible using conventional techniques. The process is particularly applicable to the repetitive formation of images.
Inventors
- 👤 John B Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:19
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/228; G03G13/00; G03G13/22; G03G5/00; G03G5/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
119 words
A method for forming charge patterns which comprises the steps of: a. providing in imagewise configuration a layer of an injecting material on a conductive substrate to form an injecting master, said injecting material being capable of generating and injecting charge carriers in response to electrical field alone; b. providing a layer of an insulating liquid on said injecting master; c. contacting the free surface of said layer of insulating liquid with an insulating member; and, d. applying an electrical potential difference across said injecting material and said insulating liquid layer of sufficient magnitude to cause said injecting material to form a charge pattern on said insulating member as a result of charge carrier injection from said injection material.
Claim 2
Independent Claim
119 words
A method for forming charge patterns which comprises the steps of: a. providing in imagewise configuration a layer of an injecting material on a conductive substrate to form an injecting master, said injecting material being capable of generating and injecting charge carriers in response to electrical field alone; b. providing a layer of an insulating liquid on said injecting master; c. contacting the free surface of said layer of insulating liquid with an insulating member; and, d. applying an electrical potential difference across said injecting material and said insulating liquid layer of sufficient magnitude to cause said injecting material to form a charge pattern on said insulating member as a result of charge carrier injection from said injection material.
Claim 3
Dependent Claim
33 words
The method of claim 1 wherein said potential difference is applied between an electrode positioned in contact with the free surface of said insulating member and said conductive substrate for said injecting master.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein said injecting material comprises a charge carrier generating and injecting material dispersed in a binder.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein said injecting material comprises a charge carrier generating and injecting material in solid solution in a binder.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein said injecting material is homogeneous.
Claim 7
Dependent Claim
11 words
The method of claim 1 wherein said injecting material is inorganic.
Claim 8
Dependent Claim
11 words
The method of claim 1 wherein said injecting material is organic.
Claim 9
Dependent Claim
29 words
The method of claim 1 and further including the step of; (e) contacting said insulating member bearing said charge pattern with a liquid developer until an image is formed.
Claim 10
Dependent Claim
34 words
The method of claim 1 and further including the step of; (e) contacting said insulating member bearing said charge pattern with a thin film of an insulating liquid until an interference pattern is formed.
Claim 11
Dependent Claim
30 words
The method of claim 1 and further including the step of; (e) contacting said insulating member bearing said charge pattern with a liquid crystalline material until an image is formed.
Claim 12
Dependent Claim
18 words
The method of claim 1 wherein said injecting material is provided on the surface of an insulating web.
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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |