US4876572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image recording having a removable image forming case
Assignee: Ricoh Co Ltd
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Filing: 1988-09-15
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Granted: 1989-10-24
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Expires: 2008-09-15
Abstract
Abstract An electrophotographic copier, laser printer, facsimile apparatus or similar image recorder includes an image forming case in which a photoconductive element, a developing device and a cleaning device are individually detachably accommodated. The image forming case is removable mounted on a body of the image recorder which is constituted by an upper unit and a lower unit, the case being disposed between the upper and lower units. The photoconductive element, developing device and cleaning device are pressed from above by the upper unit to be positioned with accuracy in individual positioning portions which are provided on the lower unit.
Inventors
- 👤 Shinji Nagatsuna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:42
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/18; G03G21/1839; G03G21/1842; G03G21/1604; G03G21/1623; G03G21/1628; G03G21/1642; G03G21/1647; G03G21/1661; G03G21/1671; G03G2221/00; G03G2221/16; G03G2221/1651; G03G2221/1654; G03G2221/1678; G03G2221/1684; G03G2221/18; G03G2221/183; G03G2221/1853; G03G2221/1869
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
114 words
In an image recorder having a body which is divided into an upper and a lower unit being openable relative to each other, and an image forming case which is disposed between said upper and lower units and accommodates a photoconductive element, a developing device and a cleaning device detachably therein, the improvement wherein said lower unit comprises positioning means for positioning said photoconductive element, said developing device and said cleaning device individually, and said upper unit comprises pressing means for pressing said photoconductive element, said developing device and said cleaning unit against said lower unit so that said photoconductive element, said developing device and said cleaning device are positioned by said positioning means.
Claim 2
Dependent Claim
114 words
In an image recorder having a body which is divided into an upper and a lower unit being openable relative to each other, and an image forming case which is disposed between said upper and lower units and accommodates a photoconductive element, a developing device and a cleaning device detachably therein, the improvement wherein said lower unit comprises positioning means for positioning said photoconductive element, said developing device and said cleaning device individually, and said upper unit comprises pressing means for pressing said photoconductive element, said developing device and said cleaning unit against said lower unit so that said photoconductive element, said developing device and said cleaning device are positioned by said positioning means.
Claim 3
Dependent Claim
35 words
An image recorder as claimed in claim 1, wherein said positioning means comprises projections which extend upward from said lower unit in association with said photoconductive element, said developing device and said cleaning device respectively.
Claim 4
Dependent Claim
71 words
An image recorder as claimed in claim 2, wherein said photoconductive element comprises a shaft which is supported by one of said projections which is associated with said photoconductive element, said developing device comprises a reference shaft supported by one of said projections which is associated with said developing device, and said cleaning device comprises a reference shaft supported by one of said projections which is associated with said cleaning device.
Claim 5
Dependent Claim
28 words
An image recorder as claimed in claim 3, wherein said pressing means comprises an arm extending from said upper unit to press said shaft of said photoconductive element.
References Cited (Backward Citations)
US4538896A
Cited
JPS60143360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |