Patent US4827308A successfully refreshed from Google Patents.
US4827308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process unit for an imaging apparatus
Assignee: Xerox Corp
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Filing: 1987-12-10
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Granted: 1989-05-02
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Expires: 2007-12-10
Abstract
Abstract A process unit which can be removably mounted in a main assembly of an electrostatographic copying machine. The unit comprises a housing enclosing an imaging member and, optionally, other processing means such as a development device, a cleaner, and a charge corotron. The transfer corotron, for transferring a toner image from the photoreceptor to a copy sheet is incorporated in the cassette housing, thus avoiding the need to provide a separate movable cover to protect the imaging member from contamination, physical damage, and light exposure when the cassette is removed from the main assembly of the copier.
Inventors
- 👤 Alan C. R. Howard
- 👤 David M. Newbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:36
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/18; G03G21/1803; G03G21/1828; G03G21/1832; G03G21/1604; G03G21/1623; G03G21/1638; G03G2221/00; G03G2221/16; G03G2221/1606; G03G2221/1609; G03G2221/1615; G03G2221/1651; G03G2221/1654; G03G2221/1693; G03G2221/18; G03G2221/183
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
52 words
A process unit adapted to be removably mounted in a main assembly of an electrostatographic reproducing the unit comprising a housing, an imaging member inside the housing, and a charging device for transferring an image from the imaging member to a copy sheet, the transfer charging device forming part of said housing.
Claim 2
Dependent Claim
52 words
A process unit adapted to be removably mounted in a main assembly of an electrostatographic reproducing the unit comprising a housing, an imaging member inside the housing, and a charging device for transferring an image from the imaging member to a copy sheet, the transfer charging device forming part of said housing.
Claim 3
Dependent Claim
46 words
A process unit as claimed in claim 1, wherein the housing has an aperture adjacent the transfer charging device through which aperture a copy sheet may enter the process unit, the housing further comprising an integral guide member for guiding the copy sheet to the aperture.
Claim 4
Dependent Claim
27 words
A process unit as claimed in claim 1, wherein the charging device shields and protects the imaging member when the unit is removed from the main assembly.
Claim 5
Dependent Claim
27 words
A process unit as claimed in claim 2, wherein the charging device is a corotron comprising a shield, the guide member being formed integrally with said shield.
Claim 6
Dependent Claim
57 words
An electrostatographic reproducing machine comprising a main assembly, and a process unit adapted to be removably mounted in said main assembly, said unit comprising a housing, an imaging member inside the housing, and a charging device for transferring an image from the imaging member to a copy sheet, the transfer charging device forming part of said housing.
Claim 7
Dependent Claim
57 words
An electrostatographic reproducing machine comprising a main assembly, and a process unit adapted to be removably mounted in said main assembly, said unit comprising a housing, an imaging member inside the housing, and a charging device for transferring an image from the imaging member to a copy sheet, the transfer charging device forming part of said housing.
Claim 8
Dependent Claim
46 words
A reproducing machine as claimed in claim 5, wherein the housing has an aperture adjacent the transfer charging device through which aperture a copy sheet may enter the process unit, the housing further comprising an integral guide member for guiding the copy sheet to the aperture.
Claim 9
Dependent Claim
27 words
A reproducing machine as claimed in claim 6, wherein the charging device is a corotron comprising a shield, the guide member being formed integrally with said shield.
Claim 10
Dependent Claim
27 words
A reproducing machine as claimed in claim 5, wherein the charging device shields and protects the imaging member when the unit is removed from the main assembly.
References Cited (Backward Citations)
US3985436A
Cited
US4470689A
Cited
US4462677A
Cited
US4609276A
Cited
US4511237A
Cited
US4530588A
Cited
US4607941A
Cited
US4540268A
Cited
US4583844A
Cited
JPS61251868A
Cited
JPH06197663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |