Patent US4772253A successfully refreshed from Google Patents.
US4772253A
Expired / Lapsed
US
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Endless belt
Assignee: Ricoh Co Ltd
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Filing: 1987-04-09
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Granted: 1988-09-20
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Expires: 2007-04-09
Abstract
Abstract A wide seamless endless belt. A belt comprising a wide seamless endless-belt-like sheet metal 10 to 50 μm, and a lining layer made of flexible material provided on the inside surface thereof and carrying a mechanical force required for belt. This endless belt is used as a substrate of a photosensitive belt for an electrostatic photographic copying machine.
Inventors
- 👤 Yutaka Koizumi
- 👤 Hidetoshi Yano
- 👤 Hideki Akiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:45
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; G; G03; G03G; G03G5/00; G03G5/10; B32B2311/00; B32B2433/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24777
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
53 words
An endless belt consisting of: only two layers of a wide seamless endless-belt-like sheet metal 10 to 50 μm thick, and a lining layer made of flexible material and thick enough to carry a mechanical force required for a belt, and said lining layer formed on the inside surface of said sheet metal.
Claim 2
Dependent Claim
53 words
An endless belt consisting of: only two layers of a wide seamless endless-belt-like sheet metal 10 to 50 μm thick, and a lining layer made of flexible material and thick enough to carry a mechanical force required for a belt, and said lining layer formed on the inside surface of said sheet metal.
Claim 3
Dependent Claim
15 words
An endless belt as claimed in claim 1, wherein said flexible material is synthetic resin.
Claim 4
Dependent Claim
14 words
An endless belt as claimed in claim 1, wherein said flexible material is rubber.
Claim 5
Dependent Claim
14 words
An endless belt as claimed in claim 1, wherein said lining layer is conductive.
Claim 6
Dependent Claim
26 words
An endless belt as claimed in claim 1, wherein said lining layer is provided with a belt-shift limiting means projecting inwardly on both side ends thereof.
Claim 7
Dependent Claim
30 words
An endless belt as claimed in claim 1, wherein said lining layer is provided with end protective pieces covering top edges of said sheet metal at the both ends thereof.
Claim 8
Dependent Claim
63 words
An endless belt consisting of: only three layers of a wide seamless endless-belt-like sheet metal 10 to 50 μm thick, a lining layer made of flexible material and thick enough to carry a mechanical force required for a belt, formed on the inside surface of said sheet, and a photosensitive layer built up on the outer surface of said seamless endless-belt-like sheet metal.
Claim 9
Dependent Claim
63 words
An endless belt consisting of: only three layers of a wide seamless endless-belt-like sheet metal 10 to 50 μm thick, a lining layer made of flexible material and thick enough to carry a mechanical force required for a belt, formed on the inside surface of said sheet, and a photosensitive layer built up on the outer surface of said seamless endless-belt-like sheet metal.
References Cited (Backward Citations)
US4155639A
Cited
US4606955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |