US4077358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deactivating device for a magnetic brush developer used in a multicolor electrophotographic copying machine
Assignee: Xerox Ltd
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Filing: 1977-05-03
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Granted: 1978-03-07
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Expires: 1997-05-03
Abstract
Abstract A magnetic brush arrangement having plural magnetic rolls for applying developer material to an electrostatic latent image. One of the rolls is selectively rendered inoperative by the provision of means to remove developer from the roll while concurrently interposing a separator sheet between the inoperative roll and the latent image.
Inventors
- 👤 Hidetoshi Kito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:31
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09; G03G15/0942; G03G15/01; G03G15/0105; G03G15/0126
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
104 words
In a developing arrangement having at least two magnetic brush developing rolls, one of which is held in an inoperative condition while the other is operated to develop the latent image, the improvement comprising, a control plate associated with each roll for removing developer material from said rolls, a separator associated with each roll and interposable between its associated roll and the latent image, and means for controlling the plate and separator of one of said rolls independently of the other whereby one roll may be rendered inoperative to develop said image independently of the other by concurrently adjusting its associated plate and separator.
Claim 2
Dependent Claim
104 words
In a developing arrangement having at least two magnetic brush developing rolls, one of which is held in an inoperative condition while the other is operated to develop the latent image, the improvement comprising, a control plate associated with each roll for removing developer material from said rolls, a separator associated with each roll and interposable between its associated roll and the latent image, and means for controlling the plate and separator of one of said rolls independently of the other whereby one roll may be rendered inoperative to develop said image independently of the other by concurrently adjusting its associated plate and separator.
Claim 3
Dependent Claim
17 words
The combination recited in claim 1 wherein said plate and separator are operated by a solenoid means.
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) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |