Patent US4501620A successfully refreshed from Google Patents.
US4501620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning a photo-sensitive body
Assignee: Toshiba Corp
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Filing: 1982-04-15
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Granted: 1985-02-26
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Expires: 2002-04-15
Abstract
Abstract Toner is removed from the surface of a drum coated with a photo-sensitive material by bringing a cleaning blade into contact with the surface when the drum is stationary, rotating the drum at a monotonically increasing rate of speed until a predetermined rotational speed is reached, monotonically increasing the contact pressure exerted by the blade against the drum surface while the drum speed is being increased so that the contact pressure reaches a maximum contact pressure when the drum reaches the predetermined rotational speed, and maintaining the maximum contact pressure while the drum continues rotating at the predetermined rotational speed.
Inventors
- 👤 Goro Oda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:42
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0011; G03G21/0029
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A method of cleaning toner from a surface of a photo-sensitive body after transfer of an image from said body comprising the steps of: (a) bringing a cleaning blade into contact with said surface at a first contact pressure when said body is stationary; (b) rotating said body and monotonically increasing the speed of rotation thereof to a predetermined speed; (c) monotonically increasing the contact pressure while the speed of said body is being increased, so that the contact pressure reaches a maximum contact pressure when the speed of rotation of said body reaches said predetermined speed; and (d) maintaining said maximum contact pressure while said body continues rotating at said predetermined speed, so that said blade moves toner from said surface.
Claim 2
Independent Claim
122 words
A method of cleaning toner from a surface of a photo-sensitive body after transfer of an image from said body comprising the steps of: (a) bringing a cleaning blade into contact with said surface at a first contact pressure when said body is stationary; (b) rotating said body and monotonically increasing the speed of rotation thereof to a predetermined speed; (c) monotonically increasing the contact pressure while the speed of said body is being increased, so that the contact pressure reaches a maximum contact pressure when the speed of rotation of said body reaches said predetermined speed; and (d) maintaining said maximum contact pressure while said body continues rotating at said predetermined speed, so that said blade moves toner from said surface.
Claim 3
Dependent Claim
28 words
A method according to claim 1 further comprising the steps of: (e) stopping motion of said body; and (f) removing contact between said cleaning blade and said surface.
Claim 4
Dependent Claim
30 words
A method according to claim 1 wherein step (a) comprises the step of bringing said cleaning blade into contact with said surface with a translational movement of said cleaning blade.
Claim 5
Dependent Claim
30 words
A method according to claim 1 wherein step (a) comprises the step of bringing said cleaning blade into contact with said surface with a rotational movement of said cleaning blade.
Claim 6
Dependent Claim
18 words
A method according to claim 2 further comprising the step of: (g) recovering toner cleaned from said surface.
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) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |