US4044719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing apparatus in electro-copying machines
Assignee: Xerox Ltd
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Filing: 1976-07-27
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Granted: 1977-08-30
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Expires: 1996-07-27
Abstract
Abstract To insure that fresh toner dispensed into a magnetic brush developing apparatus is thoroughly stirred and mixed with developer which has been stripped from a magnetic roll, the member used to strip the developer from the roll is disposed beneath the toner dispensing opening, and is formed from two inclined plates joined together by a spring to form a continuous inclined surface extending from the roll, the lower plate being connected to a vibration generator.
Inventors
- 👤 Hitoshi Ohmori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:05
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
148 words
An improved developing apparatus for transporting developer from a reservoir past a photoreceptor to develop electrostatic latent image on the latter, the apparatus including: a magnetic roller mounted adjacent the photoreceptor, a stripping member extending away from the magnetic roller and downwardly toward the reservoir for stripping excess developer from the magnetic roller and returning it to the reservoir, the stripping member including a first flat plate having one edge located immediately adjacent the magnetic roller, a second flat plate, and means biasing the plates into contact with each other to form a continuous surface inclined downwardly from the magnetic roller toward the reservoir whereby excess developer is returned to the reservoir, means located above the stripping member for dispensing toner onto the stripping member, and means connected to the second flat plate for vibrating the latter to stir and mix stripped developer and newly supplied toner together.
Claim 2
Dependent Claim
148 words
An improved developing apparatus for transporting developer from a reservoir past a photoreceptor to develop electrostatic latent image on the latter, the apparatus including: a magnetic roller mounted adjacent the photoreceptor, a stripping member extending away from the magnetic roller and downwardly toward the reservoir for stripping excess developer from the magnetic roller and returning it to the reservoir, the stripping member including a first flat plate having one edge located immediately adjacent the magnetic roller, a second flat plate, and means biasing the plates into contact with each other to form a continuous surface inclined downwardly from the magnetic roller toward the reservoir whereby excess developer is returned to the reservoir, means located above the stripping member for dispensing toner onto the stripping member, and means connected to the second flat plate for vibrating the latter to stir and mix stripped developer and newly supplied toner together.
Claim 3
Dependent Claim
15 words
An improved developing apparatus as set forth in claim 1, wherein the surface is roughened.
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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |