US5055882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing agent dispersing unit for an image forming apparatus
Assignee: Toshiba Corp
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Filing: 1990-02-02
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Granted: 1991-10-08
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Expires: 2010-02-02
Abstract
Abstract An image forming apparatus has a developing device for simultaneously developing a charged pattern with developing agent into a developed image on an image carrier and removing developing agent remaining on the image carrier from a previous image forming operation from portions of the image carrier other than the developed image. The developed image is transferred from the image carrier to a recording medium. The image forming apparatus also has a dispersing unit for dispersing any developing agent remaining on the image carrier after the transfer of the developed image, the dispersing unit including at least two brush members spaced each other in sliding contact with the image carrier. A guide plate is mounted on the dispersing unit, to guide the recording medium to the brush members.
Inventors
- 👤 Seiichiro Fushimi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:31
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G21/00; G03G21/0005; G03G21/0064; G03G2221/00; G03G2221/0005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
197 words
An image forming apparatus utilizing a developing agent for forming an image on a recording medium, comprising: a rotatable image carrier; charging means for charging the image carrier; exposure means for exposing the rotatable image carrier to form a latent image corresponding to the image on the image carrier; developing/removing means for simultaneously developing the latent image with developing agent into a developed image on the image carrier and removing developing agent remaining on the image carrier from a previous image forming operation from portions of the image carrier other than the developed image; transfer means for transferring the developed image from the image carrier to the recording medium; and disperse means for dispersing any developing agent remaining on the image carrier after transfer of the developed image, the disperse means including at least two electrically conductive brush members spaced apart from each other in sliding contact with the image carrier and a voltage source connected to one of the brush members for attracting the developing agent remaining on the image carrier; the charging means, exposure means, developing/removing means, transfer means and disperse means being arranged in sequence along the direction of rotation of the image carrier.
Claim 2
Dependent Claim
197 words
An image forming apparatus utilizing a developing agent for forming an image on a recording medium, comprising: a rotatable image carrier; charging means for charging the image carrier; exposure means for exposing the rotatable image carrier to form a latent image corresponding to the image on the image carrier; developing/removing means for simultaneously developing the latent image with developing agent into a developed image on the image carrier and removing developing agent remaining on the image carrier from a previous image forming operation from portions of the image carrier other than the developed image; transfer means for transferring the developed image from the image carrier to the recording medium; and disperse means for dispersing any developing agent remaining on the image carrier after transfer of the developed image, the disperse means including at least two electrically conductive brush members spaced apart from each other in sliding contact with the image carrier and a voltage source connected to one of the brush members for attracting the developing agent remaining on the image carrier; the charging means, exposure means, developing/removing means, transfer means and disperse means being arranged in sequence along the direction of rotation of the image carrier.
Claim 3
Dependent Claim
229 words
An image forming apparatus utilizing a developing agent for forming an image on a recording medium comprising: a rotatable image carrier; charging means for charging the image carrier; exposure means for exposing the rotatable image carrier to form a latent image corresponding to the image on the image carrier; developing/removing means for simultaneously developing the latent image with developing agent into a developed image on the image carrier and removing any developing agent remaining on the image carrier from a previous image forming operation from portions of the image carrier other than the developed image; transfer means for transferring the developed image from the image carrier to the recording medium; disperse means for dispersing any developing agent remaining on the image carrier after the transfer of the developed image, the disperse means including at least two electrically conductive brush members spaced apart from each other in sliding contact with the image carrier and a voltage source connected to one of the brush members for attracting the developing agent remaining on the image carrier; and guide means mounted to the disperse means for guiding the recording medium on which the developed image has transferred from the image carrier by the transfer means; whereby the charging means, exposure means, developing/removing means, transfer means and disperse means with guide means being arranged in sequence along the rotational direction of the image carrier.
Claim 4
Dependent Claim
229 words
An image forming apparatus utilizing a developing agent for forming an image on a recording medium comprising: a rotatable image carrier; charging means for charging the image carrier; exposure means for exposing the rotatable image carrier to form a latent image corresponding to the image on the image carrier; developing/removing means for simultaneously developing the latent image with developing agent into a developed image on the image carrier and removing any developing agent remaining on the image carrier from a previous image forming operation from portions of the image carrier other than the developed image; transfer means for transferring the developed image from the image carrier to the recording medium; disperse means for dispersing any developing agent remaining on the image carrier after the transfer of the developed image, the disperse means including at least two electrically conductive brush members spaced apart from each other in sliding contact with the image carrier and a voltage source connected to one of the brush members for attracting the developing agent remaining on the image carrier; and guide means mounted to the disperse means for guiding the recording medium on which the developed image has transferred from the image carrier by the transfer means; whereby the charging means, exposure means, developing/removing means, transfer means and disperse means with guide means being arranged in sequence along the rotational direction of the image carrier.
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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) | 1994-10-07 | 1995-04-08 | 1995-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-07 | 1999-04-08 | 1999-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-07 | 2003-04-08 | 2003-10-08 | $7700.00 | Window Closed / Lapsed |