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US5177323A
Expired / Lapsed
US
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Developing device for developing an electrostatic latent image by a one-component developing agent
Assignee: Toshiba Corp
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Filing: 1991-10-23
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Granted: 1993-01-05
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Expires: 2011-10-23
Abstract
Abstract A developing device comprises a toner separating member placed in contact with a developing roller for developing a latent image on a photoconductive drum into a visible image with nonmagnetic toner conveyed as a one-component developing agent, and a toner feeding roller provided near the toner separating member. The toner separating member allows the toner which has passed on a developing position of the photosensitive drum to be separated from the developing roller. The toner feeding roller allows the separated toner to be transferred toward a toner receiving side of the developing roller.
Inventors
- 👤 Mitsuaki Kohyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:56
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G15/0815
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
A developing device for developing a latent image formed on an image carrier on a developing position by a one-component developing agent comprising: means for storing the one-component developing agent; means for conveying the one-component developing agent stored by the storing means to the image carrier; and separating/transferring means, placed in contact with the conveying means, for separating the one-component developing agent which has passed the developing position from the conveying means, while transferring the separated one-component developing agent to the storing means; wherein the separating/transferring means comprises a film-like member having a network structure formed of thin lines, and arrays of openings along each side of the network structure with the longitudinal direction of the network structure as a boundary, the separating/transferring means being adapted to slidably contact with the conveying means.
Claim 2
Dependent Claim
133 words
A developing device for developing a latent image formed on an image carrier on a developing position by a one-component developing agent comprising: means for storing the one-component developing agent; means for conveying the one-component developing agent stored by the storing means to the image carrier; and separating/transferring means, placed in contact with the conveying means, for separating the one-component developing agent which has passed the developing position from the conveying means, while transferring the separated one-component developing agent to the storing means; wherein the separating/transferring means comprises a film-like member having a network structure formed of thin lines, and arrays of openings along each side of the network structure with the longitudinal direction of the network structure as a boundary, the separating/transferring means being adapted to slidably contact with the conveying means.
Claim 3
Dependent Claim
142 words
A developing device for developing a latent image formed on an image carrier on a developing position by a one-component developing agent, comprising: means for storing the one-component developing agent; means for conveying the one-component developing agent stored by the storing means to the image carrier; layer forming means having a semi-cylindrical tip edge pressed in contact with the conveying means for forming, as a thin layer, the one-component developing agent which is conveyed to the developing position by the conveying means; removing means placed in contact with the conveying means for removing, from the conveying means, the one-component developing agent which has passed the developing position; and means, positioned relative to the conveying means, and in the same contact position as the removing means, for feeding the one-component developing agent which is removed by the removing means to the storing means.
Claim 4
Dependent Claim
142 words
A developing device for developing a latent image formed on an image carrier on a developing position by a one-component developing agent, comprising: means for storing the one-component developing agent; means for conveying the one-component developing agent stored by the storing means to the image carrier; layer forming means having a semi-cylindrical tip edge pressed in contact with the conveying means for forming, as a thin layer, the one-component developing agent which is conveyed to the developing position by the conveying means; removing means placed in contact with the conveying means for removing, from the conveying means, the one-component developing agent which has passed the developing position; and means, positioned relative to the conveying means, and in the same contact position as the removing means, for feeding the one-component developing agent which is removed by the removing means to the storing means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-01-05 | 1996-07-06 | 1997-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-05 | 2000-07-06 | 2001-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-05 | 2004-07-06 | 2005-01-05 | $7700.00 | Window Closed / Lapsed |