Patent US3713422A successfully refreshed from Google Patents.
US3713422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for developing an electrostatic latent image by liquid development
Assignee: Fujifilm Holdings Corp
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Filing: 1971-03-10
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Granted: 1973-01-30
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Expires: 1991-03-10
Abstract
Abstract A development device of an electrostatic latent image wherein rotatable and cylindrical development electrodes comprising the conductive center portion which has a small radius and will face to an electrostatic latent image on a flexible electrophotographic material, and two flange portions which have a large radius respectively and will support the both ends of said material are placed such that differences between said radius of the center portion and said radius of flange portions become smaller with the proceeding of the development, thereby a print can be made with extremely small halos, streaks, fogs and edge effects.
Inventors
- 👤 M Sato
- 👤 O Fukushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:23
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/108
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
A liquid development apparatus for developing an electrostatic latent image formed on a flexible electrophotographic material, comprising a plurality of rotating electrode rollers with a middle conductive portion which the latent image bearing surface faces and flange portions at the both ends of the rollers having a larger diameter than the middle portion, said flange portions supporting the image bearing surface by direct contact, said electrode rollers arranged in the path of said carried material and the difference in the diameters of said flange and middle conductive portions of said electrode rollers progressively decreasing along said path.
Claim 2
Dependent Claim
97 words
A liquid development apparatus for developing an electrostatic latent image formed on a flexible electrophotographic material, comprising a plurality of rotating electrode rollers with a middle conductive portion which the latent image bearing surface faces and flange portions at the both ends of the rollers having a larger diameter than the middle portion, said flange portions supporting the image bearing surface by direct contact, said electrode rollers arranged in the path of said carried material and the difference in the diameters of said flange and middle conductive portions of said electrode rollers progressively decreasing along said path.
Claim 3
Dependent Claim
97 words
A liquid development apparatus for developing an electrostatic latent image formed on a flexible electrophotographic material, comprising a plurality of rotating electrode rollers with a middle conductive portion which the latent image bearing surface faces and flange portions at the both ends of the rollers having a larger diameter than the middle portion, said flange portions supporting the image bearing surface by direct contact, said electrode rollers arranged in the path of said carried material and the difference in the diameters of said flange and middle conductive portions of said electrode rollers progressively decreasing along said path.
Claim 4
Dependent Claim
97 words
A liquid development apparatus for developing an electrostatic latent image formed on a flexible electrophotographic material, comprising a plurality of rotating electrode rollers with a middle conductive portion which the latent image bearing surface faces and flange portions at the both ends of the rollers having a larger diameter than the middle portion, said flange portions supporting the image bearing surface by direct contact, said electrode rollers arranged in the path of said carried material and the difference in the diameters of said flange and middle conductive portions of said electrode rollers progressively decreasing along said path.
Claim 5
Dependent Claim
19 words
An apparatus according to claim 1 wherein the diameters of said flange portions are equal in all electrode rollers.
Claim 6
Dependent Claim
19 words
An apparatus according to claim 2 wherein said electrode rollers are provided in a processing tank storing liquid developer.
Claim 7
Dependent Claim
35 words
An apparatus according to claim 2 wherein said flexible electrophotographic material is intermittently carried and when stopped each frame of the latent image on the material faces a middle conductive portion of each electrode roller.
Claim 8
Dependent Claim
20 words
An apparatus according to claim 1 wherein the diameters of said middle conductive portions are equal in all electrode rollers.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |