Patent US5220381A successfully refreshed from Google Patents.
US5220381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic image forming apparatus with process cartridge
Assignee: NTT Advanced Technology Corp
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Filing: 1992-05-07
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Granted: 1993-06-15
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Expires: 2012-05-07
Abstract
Abstract A process cartridge of an electrophotographic apparatus contains a photosensitive belt and an exposure device, whose positions are defined beforehand. The photosensitive belt is an endless belt having no connecting portion.
Inventors
- 👤 Toshiya Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:46
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/18; G03G21/1803; G03G21/1814; G03G21/1817; G03G2215/00; G03G2215/04; G03G2215/0497
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
An electrophotographic apparatus having a body and a process cartridge which is removably set in said body, said process cartridge comprising: a photosensitive member to which toner is electrostatically adhered and from which the toner is transferred to a paper sheet, and wherein said photosensitive member includes an endless surface formed as a loop; and an exposure device disposed inside the loop formed by said photosensitive member and which forms, on said photosensitive member, an electrostatic latent image to which toner is adhered.
Claim 2
Dependent Claim
83 words
An electrophotographic apparatus having a body and a process cartridge which is removably set in said body, said process cartridge comprising: a photosensitive member to which toner is electrostatically adhered and from which the toner is transferred to a paper sheet, and wherein said photosensitive member includes an endless surface formed as a loop; and an exposure device disposed inside the loop formed by said photosensitive member and which forms, on said photosensitive member, an electrostatic latent image to which toner is adhered.
Claim 3
Dependent Claim
14 words
An electrophotographic apparatus according to claim 1, wherein said photosensitive member is a belt.
Claim 4
Dependent Claim
19 words
An electrophotographic apparatus according to claim 1, wherein said photosensitive member is an endless belt having no connecting portion.
Claim 5
Dependent Claim
17 words
An electrophotographic apparatus according to claim 1, wherein said exposure device is removable from said process cartridge.
Claim 6
Dependent Claim
30 words
An electrophotographic apparatus according to claim 4, wherein said process cartridge is provided with an opening through which said exposure device is set into and removed from said process cartridge.
Claim 7
Dependent Claim
21 words
An electrophotographic apparatus according to claim 1, wherein said exposure device comprises a cooling fin formed on an outside surface thereof.
Claim 8
Dependent Claim
31 words
An electrophotographic apparatus according to claim 1, wherein said process cartridge is provided with a handle which is used when said process cartridge is set in and removed from said body.
Claim 9
Dependent Claim
16 words
An electrophotographic apparatus according to claim 1, wherein said exposure device is an LED array head.
Claim 10
Dependent Claim
16 words
The electrophotographic apparatus of claim 7 wherein the handle is movably mounted onto said process cartridge.
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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) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |