Patent US5047801A successfully refreshed from Google Patents.
US5047801A
Expired / Lapsed
US
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Color image forming apparatus having the developing means and cleaning means formed as a detachable unit
Assignee: Konica Minolta Inc
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Filing: 1989-12-01
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Granted: 1991-09-10
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Expires: 2009-12-01
Abstract
Abstract An electrostatic image forming apparatus for forming a color image wherein plural developers are located substantially under the image retainer, at least two of the image retainer, the developer, and the cleaner being formed as a detachable unit.
Inventors
- 👤 Satoshi Haneda
- 👤 Masakazu Fukuchi
- 👤 Hisashi Shoji
- 👤 Shunji Matsuo
- 👤 Shizuo Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:27
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/18; G03G21/1803; G03G21/1814; G03G15/00; G03G15/01; G03G21/1604; G03G21/1623; G03G21/1628; G03G21/1839; G03G21/1842; G03G21/1853; G03G2221/00; G03G2221/16; G03G2221/1603; G03G2221/1642; G03G2221/1672; G03G2221/1678; G03G2221/1687; G03G2221/18; G03G2221/183; G03G2221/1853
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
183 words
An electrostatic image forming apparatus for forming a color image comprising; an image retainer for carrying said color image, a charging means for charging a surface of said image retainer, a means for forming a latent image on the charged surface of said image retainer, a plurality of developing means for developing said latent image, wherein said developing means are positioned adjacent each other under said image retainer, a transfer sheet conveyance means for conveying a transfer sheet to a transfer means, said transfer means for transferring said developed latent image onto said transfer sheet, wherein said transfer sheet conveyance means and said transfer means are movably located on the upper side of said image retainer, a top frame part of said electrostatic image forming apparatus, comprising said transfer sheet conveyance means and said transfer means, being adapted to be opened, and a cleaning means for cleaning residual toner from the surface of said image retainer, wherein said image retainer, said cleaning means, and said developing means, are formed as a unit and said unit is detachable from said electrostatic image forming apparatus.
Claim 2
Dependent Claim
183 words
An electrostatic image forming apparatus for forming a color image comprising; an image retainer for carrying said color image, a charging means for charging a surface of said image retainer, a means for forming a latent image on the charged surface of said image retainer, a plurality of developing means for developing said latent image, wherein said developing means are positioned adjacent each other under said image retainer, a transfer sheet conveyance means for conveying a transfer sheet to a transfer means, said transfer means for transferring said developed latent image onto said transfer sheet, wherein said transfer sheet conveyance means and said transfer means are movably located on the upper side of said image retainer, a top frame part of said electrostatic image forming apparatus, comprising said transfer sheet conveyance means and said transfer means, being adapted to be opened, and a cleaning means for cleaning residual toner from the surface of said image retainer, wherein said image retainer, said cleaning means, and said developing means, are formed as a unit and said unit is detachable from said electrostatic image forming apparatus.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein said top frame part further comprises a scanning means.
Claim 4
Dependent Claim
205 words
An electrostatic image forming apparatus for forming a color image comprising; an image retainer for carrying said color image, a charging means for charging a surface of said image retainer, a means for forming a latent image on the charged surface of said image retainer, wherein said latent image forming means forms said latent image under said image retainer, a plurality of developing means for developing said latent image to form a toner image, wherein said developing means are positioned adjacent to each other on a side of said image retainer, a transfer sheet conveyance means for conveying a transfer sheet to a transfer means, said transfer means for transferring said toner image onto said transfer sheet, wherein said transfer sheet conveyance means and said transfer means are movably located on the upper side of said image retainer, a top frame part of said electrostatic image forming apparatus, comprising said transfer sheet conveyance means and said transfer means, being adapted to be opened, and a cleaning means for cleaning residual toner from the surface of said image retainer, wherein said image retainer, said cleaning means and said developing means, are formed as a unit and said unit is detachable from said electrostatic image forming apparatus.
Claim 5
Dependent Claim
205 words
An electrostatic image forming apparatus for forming a color image comprising; an image retainer for carrying said color image, a charging means for charging a surface of said image retainer, a means for forming a latent image on the charged surface of said image retainer, wherein said latent image forming means forms said latent image under said image retainer, a plurality of developing means for developing said latent image to form a toner image, wherein said developing means are positioned adjacent to each other on a side of said image retainer, a transfer sheet conveyance means for conveying a transfer sheet to a transfer means, said transfer means for transferring said toner image onto said transfer sheet, wherein said transfer sheet conveyance means and said transfer means are movably located on the upper side of said image retainer, a top frame part of said electrostatic image forming apparatus, comprising said transfer sheet conveyance means and said transfer means, being adapted to be opened, and a cleaning means for cleaning residual toner from the surface of said image retainer, wherein said image retainer, said cleaning means and said developing means, are formed as a unit and said unit is detachable from said electrostatic image forming apparatus.
Claim 6
Dependent Claim
15 words
The apparatus of claim 3 wherein said top frame part further comprises a scanning means.
Claim 7
Dependent Claim
202 words
An electrostatic image forming apparatus for forming a color image comprising; an image retainer for carrying a color image, a charging means for charging a surface of said image retainer, a means for forming a latent image on the charged surface of said image retainer, a plurality of developing means for developing said latent image to produce a toner image, said developing means being positioned adjacent to each other under said image retainer, a transfer sheet conveyance means for conveying a transfer sheet to a transfer means, said transfer means for transferring said toner image onto said transfer sheet, wherein said transfer sheet conveyance means and said transfer means are movably located on the upper side of said image retainer, a top frame part of said electrostatic image forming apparatus, comprising said transfer sheet conveyance means and said transfer means, being adapted to be opened, and a cleaning means for cleaning residual toner from the surface of said image retainer, wherein said image retainer, and said cleaning means are formed as a first unit and said plurality of developing means are formed as a second unit, said first unit and said second unit being individually detachable from said electrostatic image forming apparatus.
Claim 8
Dependent Claim
202 words
An electrostatic image forming apparatus for forming a color image comprising; an image retainer for carrying a color image, a charging means for charging a surface of said image retainer, a means for forming a latent image on the charged surface of said image retainer, a plurality of developing means for developing said latent image to produce a toner image, said developing means being positioned adjacent to each other under said image retainer, a transfer sheet conveyance means for conveying a transfer sheet to a transfer means, said transfer means for transferring said toner image onto said transfer sheet, wherein said transfer sheet conveyance means and said transfer means are movably located on the upper side of said image retainer, a top frame part of said electrostatic image forming apparatus, comprising said transfer sheet conveyance means and said transfer means, being adapted to be opened, and a cleaning means for cleaning residual toner from the surface of said image retainer, wherein said image retainer, and said cleaning means are formed as a first unit and said plurality of developing means are formed as a second unit, said first unit and said second unit being individually detachable from said electrostatic image forming apparatus.
Claim 9
Dependent Claim
219 words
An electrostatic image forming apparatus for forming a color image comprising; an image retainer for carrying a color image, a charging means for charging a surface of said image retainer, a means for forming a latent image on the charged surface of said image retainer, wherein said latent image forming means forms said latent image under said image retainer, a plurality of developing means for developing said latent image to produce a toner image, said developing means being positioned adjacent to each other on the side of said image retainer, a transfer sheet conveyance means for conveying a transfer sheet to a transfer means, said transfer means for transferring said toner image onto said transfer sheet, wherein said transfer sheet conveyance means and said transfer means are movably located on the upper side of said image retainer, a top frame part of said electrostatic image forming apparatus, comprising said transfer sheet conveyance means and said transfer means, being adapted to be opened, and a cleaning means for cleaning residual toner from the surface of said image retainer, wherein said image retainer, and said cleaning means are formed as a first unit and said plurality of developing means are formed as a second unit, said first unit and said second unit being individually detachable from said electrostatic image forming apparatus.
Claim 10
Dependent Claim
219 words
An electrostatic image forming apparatus for forming a color image comprising; an image retainer for carrying a color image, a charging means for charging a surface of said image retainer, a means for forming a latent image on the charged surface of said image retainer, wherein said latent image forming means forms said latent image under said image retainer, a plurality of developing means for developing said latent image to produce a toner image, said developing means being positioned adjacent to each other on the side of said image retainer, a transfer sheet conveyance means for conveying a transfer sheet to a transfer means, said transfer means for transferring said toner image onto said transfer sheet, wherein said transfer sheet conveyance means and said transfer means are movably located on the upper side of said image retainer, a top frame part of said electrostatic image forming apparatus, comprising said transfer sheet conveyance means and said transfer means, being adapted to be opened, and a cleaning means for cleaning residual toner from the surface of said image retainer, wherein said image retainer, and said cleaning means are formed as a first unit and said plurality of developing means are formed as a second unit, said first unit and said second unit being individually detachable from said electrostatic image forming apparatus.
Claim 11
Dependent Claim
15 words
The apparatus of claim 6 wherein said top frame part further comprises a scanning means.
References Cited (Backward Citations)
US4733274A
Cited
JPS5872159A
Cited
US4664504A
Cited
US4605299A
Cited
US4682880A
Cited
JPS61279870A
Cited
JPS6231865A
Cited
US4642661A
Cited
US4814817A
Cited
JPS63246760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-09 | 1995-03-11 | 1995-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-09 | 1999-03-11 | 1999-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-09 | 2003-03-11 | 2003-09-10 | $7700.00 | Window Closed / Lapsed |