Patent US5107304A successfully refreshed from Google Patents.
US5107304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable cartridge for a color image forming apparatus
Assignee: Konica Minolta Inc
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Filing: 1990-02-15
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Granted: 1992-04-21
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Expires: 2010-02-15
Abstract
Abstract A color image forming apparatus having an image retainer, a cleaning device for removing residual toner particles on the image retainer, and a device for releasing the cleaning device from the image retainer, which are integrally constructed as a process unit and can be taken out from an apparatus body. The cleaning device is in pressure contact with the image retainer when the process unit has been taken away. The device for releasing the cleaning device is mounted on the apparatus body.
Inventors
- 👤 Satoshi Haneda
- 👤 Masakuzu Fukuchi
- 👤 Hisashi Shoji
- 👤 Shunji Matsuo
- 👤 Shizuo Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:53
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/18; G03G21/1803; G03G21/1807; G03G15/00; G03G15/01; G03G21/1604; G03G21/1623; G03G21/1633; G03G21/1814; G03G21/1817; G03G21/1821; G03G2221/00; G03G2221/16; G03G2221/1603; G03G2221/1618; G03G2221/1651; G03G2221/1654; G03G2221/18; G03G2221/183
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A color image forming apparatus having a body, an image retainer, a cleaning member for removing residual toner particles from said image retainer, and retaining means for releasably retaining said cleaning member in contact with said image retainer, the apparatus comprising: a process unit assembly containing said image retainer, said cleaning member, and said retaining means, said process unit being removable from said body, retraction means on said body for selectively releasing said cleaning member from contact with said image retainer, and means for rendering said retraction means inoperative upon removal of said process unit to insure that said cleaning member is in contact with said image retainer when said process unit has been removed from said body.
Claim 2
Dependent Claim
118 words
A color image forming apparatus having a body, an image retainer, a cleaning member for removing residual toner particles from said image retainer, and retaining means for releasably retaining said cleaning member in contact with said image retainer, the apparatus comprising: a process unit assembly containing said image retainer, said cleaning member, and said retaining means, said process unit being removable from said body, retraction means on said body for selectively releasing said cleaning member from contact with said image retainer, and means for rendering said retraction means inoperative upon removal of said process unit to insure that said cleaning member is in contact with said image retainer when said process unit has been removed from said body.
Claim 3
Dependent Claim
16 words
The color image forming apparatus according to claim 1, wherein said cleaning member is a cleaning
Claim 4
Dependent Claim
20 words
The color image forming apparatus according to claim 1, wherein said process unit further comprises a plurality of developing devices.
Claim 5
Dependent Claim
132 words
A color image forming apparatus having a body, an image retainer, a cleaning device including at least one cleaning member, and means for releasably retaining said at least one cleaning member in pressure contact with said image retainer, the apparatus comprising: a process unit containing said image retainer, said cleaning member, and said releasable retaining means, said process unit being removable from said body, and means on said body for selectively releasing said cleaning member from contact with said image retainer when said process unit is in said body, said last mentioned means being separated from said process unit upon removal thereof from said body, wherein said retaining means causes said cleaning member to be in pressure contact with said image retainer when said process unit has been removed from said body.
Claim 6
Dependent Claim
132 words
A color image forming apparatus having a body, an image retainer, a cleaning device including at least one cleaning member, and means for releasably retaining said at least one cleaning member in pressure contact with said image retainer, the apparatus comprising: a process unit containing said image retainer, said cleaning member, and said releasable retaining means, said process unit being removable from said body, and means on said body for selectively releasing said cleaning member from contact with said image retainer when said process unit is in said body, said last mentioned means being separated from said process unit upon removal thereof from said body, wherein said retaining means causes said cleaning member to be in pressure contact with said image retainer when said process unit has been removed from said body.
Claim 7
Dependent Claim
20 words
The color image forming apparatus according to claim 4, wherein said process unit further comprises a plurality of developing devices.
Claim 8
Dependent Claim
20 words
The color image forming apparatus according to claim 5, wherein said at least one cleaning member is a cleaning blade.
Claim 9
Dependent Claim
24 words
The color image forming apparatus according to claim 5, wherein said at least one cleaning member is a cleaning blade and a shielding plate.
Claim 10
Dependent Claim
28 words
The color image forming apparatus according to claim 5, wherein said at least one cleaning member is a cleaning blade, a shielding plate and a rotating brush member.
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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) | 1995-04-21 | 1995-10-21 | 1996-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-21 | 1999-10-21 | 2000-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-21 | 2003-10-21 | 2004-04-21 | $7700.00 | Window Closed / Lapsed |