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Patent US5148224A successfully refreshed from Google Patents.
US5148224A
Expired / Lapsed
US
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Thin layer coated endless belt of an electrophotographic printing machine
Assignee: Ricoh Printing Systems Ltd
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Filing: 1991-04-30
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Granted: 1992-09-15
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Expires: 2011-04-30
Abstract
Abstract In an electrophotographic printing machine, the endless belt has a thin protective layer on each of the inner and outer surfaces thereof which is high in mold release characteristic and effective in minimization of the deterioration in electrical characteristic of the endless belt.
Inventors
- 👤 Masato Yamada
- 👤 Junzi Shirakawa
- 👤 Kazuo Uno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:40
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; G03G15/165; G03G15/1655; G03G5/00; G03G5/10; G03G5/14; G03G5/147
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
82 words
An endless belt of an electrophotographic printing machine which pushes photosensitive material against a recording medium onto which an image is to be transferred, said endless belt being laid over two rollers and being 10° to 10 14 Ω.cm in volume resistivity and comprising: an inner surface, an outer surface and a thin protective layer covering the inner and outer surfaces, wherein said thin protective layer comprises a fluoro-latex coating 20 μm in thickness and about 10 13 Ω.cm in electrical resistance.
Claim 2
Dependent Claim
82 words
An endless belt of an electrophotographic printing machine which pushes photosensitive material against a recording medium onto which an image is to be transferred, said endless belt being laid over two rollers and being 10° to 10 14 Ω.cm in volume resistivity and comprising: an inner surface, an outer surface and a thin protective layer covering the inner and outer surfaces, wherein said thin protective layer comprises a fluoro-latex coating 20 μm in thickness and about 10 13 Ω.cm in electrical resistance.
Claim 3
Dependent Claim
21 words
An endless belt as claimed in claim 1, in which said thin protective layer contains fluorine, fluorine-based rubber and surface-active agent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-15 | 1996-03-16 | 1996-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-15 | 2000-03-16 | 2000-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-15 | 2004-03-16 | 2004-09-15 | $7700.00 | Window Closed / Lapsed |