Patent US4299902A successfully refreshed from Google Patents.
US4299902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming process and apparatus therefor
Assignee: Canon Inc
•
Filing: 1978-07-18
•
Granted: 1981-11-10
•
Expires: 1998-07-18
Abstract
Abstract An image forming process including a step of developing an electrostatic image by supplying a liquid developer to a surface holding said image thereon, which comprises conducting said development when a liquid developer supply member capable, upon elastic deformation thereof, of squeezing out and absorbing said liquid developer is brought into pressure contact with said image-holding surface, and, when said development is not performed, separating said supply member from said surface and maintaining said supply member in a state wetted with said liquid developer. And also an image forming apparatus which is adapted for use in such process.
Inventors
- 👤 Ikuo Soma
- 👤 Tamotu Magome
- 👤 Toru Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:25
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
133 words
In an image forming process for developing an electrostatic image with liquid developer which comprises the steps of performing liquid development by moving an elastic liquid developer supply member capable, upon elastic deformation thereof, of squeezing out and absorbing liquid developer into pressure contact with an image-holding surface bearing the electrostatic image, displacing said image-holding surface during the development, and separating said supply member from said surface after development, the improvement comprising the steps of immersing substantially the entire liquid developer supply member within the liquid developer after its separation from the image-holding surface so that its elastic material is maintained wet throughout after the development has been completed, and then stopping the displacement of said image-holding surface after the final contact portion of said surface when said supply member has been cleaned.
Claim 2
Dependent Claim
133 words
In an image forming process for developing an electrostatic image with liquid developer which comprises the steps of performing liquid development by moving an elastic liquid developer supply member capable, upon elastic deformation thereof, of squeezing out and absorbing liquid developer into pressure contact with an image-holding surface bearing the electrostatic image, displacing said image-holding surface during the development, and separating said supply member from said surface after development, the improvement comprising the steps of immersing substantially the entire liquid developer supply member within the liquid developer after its separation from the image-holding surface so that its elastic material is maintained wet throughout after the development has been completed, and then stopping the displacement of said image-holding surface after the final contact portion of said surface when said supply member has been cleaned.
Claim 3
Dependent Claim
26 words
A process according to claim 1, further comprising the step of rotating said liquid developer supply member while it is substantially immersed in said liquid developer.
Claim 4
Dependent Claim
40 words
A process according to claim 1, wherein the development of the electrostatic image is conducted while said liquid developer supply member is maintained in pressure contact with said image-holding surface in a substantially static manner with respect to said surface.
Claim 5
Dependent Claim
32 words
A process according to claim 1, further comprising the step of absorbing and replenishing liquid developer to said supply member while said supply member is substantially fully immersed in said liquid developer.
Claim 6
Dependent Claim
29 words
A process according to claim 1, wherein said liquid developer supply member is rotated during development and is maintained in rotation when substantially fully immersed in said liquid developer.
Claim 7
Dependent Claim
33 words
A process according to claim 1 or 2, wherein the absorption and replenishment of liquid developer to said supply member are terminated when the supply member is substantially immersed in said liquid developer.
References Cited (Backward Citations)
US3800743A
Cited
US3743407A
Cited
US4021586A
Cited
US3908594A
Cited
US3942474A
Cited
US4010288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |