US4875070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing toner from a rotating drum in a xerographic copying machine using a vibrating blade
Assignee: Yokohama Rubber Co Ltd
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Filing: 1987-12-28
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Granted: 1989-10-17
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Expires: 2007-12-28
Abstract
Abstract A method of removing a toner deposited on a rotating drum in a xerographic copying machine, comprises: positioning a blade with its scraping edge positioned closely adjacent to a surface of the drum; and imparting vibrations to the blade so as to bring the scraping edge alternately into and out of contact with the surface of the drum at short time intervals.
Inventors
- 👤 Yutaka Hattori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:29
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0011; G03G21/0029; G03G2221/00; G03G2221/0005; G03G2221/0021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
138 words
A method of removing a toner deposited on a rotating drum in a xerographic copying machine, comprising: (a) positioning a blade having a scraping edge which is disposed closely adjacent the outer surface of the drum, the blade being defined by said scraping edge, an outer edge opposite said scraping edge and remote from the drum and two opposite end edges, the blade having a width extending between said scraping edge and said outer edge and a length extending between said end edges; and (b) imparting vibrations to the blade from one of said edges other than said scraping edge to produce non-standing vibration waves which run through the blade to bring said scraping edge alternately into and out of contact with the outer surface of the drum at short time intervals so as to remove toner therefrom.
Claim 2
Independent Claim
138 words
A method of removing a toner deposited on a rotating drum in a xerographic copying machine, comprising: (a) positioning a blade having a scraping edge which is disposed closely adjacent the outer surface of the drum, the blade being defined by said scraping edge, an outer edge opposite said scraping edge and remote from the drum and two opposite end edges, the blade having a width extending between said scraping edge and said outer edge and a length extending between said end edges; and (b) imparting vibrations to the blade from one of said edges other than said scraping edge to produce non-standing vibration waves which run through the blade to bring said scraping edge alternately into and out of contact with the outer surface of the drum at short time intervals so as to remove toner therefrom.
Claim 3
Dependent Claim
29 words
A method according to claim 1, wherein said non-standing waves run longitudinally along the length of the blade from one of said end edges toward the other end edge.
Claim 4
Dependent Claim
25 words
A method according to claim 1, wherein said non-standing waves run across the width of the blade from said outer edge toward the scraping edge.
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) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |