US4931840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning device
Assignee: Ricoh Co Ltd
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Filing: 1989-06-28
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Granted: 1990-06-05
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Expires: 2009-06-28
Abstract
Abstract A cleaning device includes a cleaning blade for scraping out toner from a photosensitive member and a polygonal member for carrying scraped toner into a toner container. A rotation center of a blade holder for supporting the cleaning blade is coincident with a rotation center of the polygonal member. The polygonal member is composed of a plurality of sections arranged along an axis thereof. At least one of the sections has ridgelines which are shifted from those of the remaining sections.
Inventors
- 👤 Misao Tanzawa
- 👤 Shuichi Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:47
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0011; G03G21/0029; G03G21/10; G03G21/105
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
96 words
A cleaning device comprising a cleaning blade adapted to be in contact with an image carrier on the trailing side thereof for removing residual toner on a surface of said image carrier, a rotatable blade holder for supporting said cleaning blade and a polygonal member rotatable for moving toner scraped from said surface of said image carrier to a toner recovery means comprised by a toner carrier, said polygonal member composed of a plurality of sections arranged along an axis thereof, at least one of said sections having ridgelines shifted from those of the remaining sections.
Claim 2
Dependent Claim
96 words
A cleaning device comprising a cleaning blade adapted to be in contact with an image carrier on the trailing side thereof for removing residual toner on a surface of said image carrier, a rotatable blade holder for supporting said cleaning blade and a polygonal member rotatable for moving toner scraped from said surface of said image carrier to a toner recovery means comprised by a toner carrier, said polygonal member composed of a plurality of sections arranged along an axis thereof, at least one of said sections having ridgelines shifted from those of the remaining sections.
Claim 3
Dependent Claim
88 words
A cleaning device as claimed in claim 1, further comprising an inlet seal adapted to be in contact with a surface of said image carrier, an opening formed between said cleaning blade and a top end of said inlet seal and a spring biasing said cleaning blade to said image carrier, said blade holder being rotated by the biasing force of said spring and said opening being closed by contacting of said cleaning blade with said inlet seal when the image carrier is removed from the cleaning device.
References Cited (Backward Citations)
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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) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |