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 18:01
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.
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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) | 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 |