Patent EP0171232A2 successfully refreshed from Google Patents.
Patent US2996650A successfully refreshed from Google Patents.
US4295239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing residual toner
Assignee: Minolta Co Ltd
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Filing: 1980-03-27
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Granted: 1981-10-20
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Expires: 2000-03-27
Abstract
Abstract The invention disclosed relates to an apparatus for removing residual toner from a surface to be cleaned which has a rotatable cleaning brush in frictional engagement with the surface, a dusting bar disposed in abutting relation to brush bristles of the cleaning brush for dusting toner off said brush bristles, both of said dusting bar and said brush bristles being made of electrically conductive material with at least one covered with an insulating material, and means for forming an alternating electric field between the brush bristles and the dusting bar. By this, residual toner is effectively removed from the brush bristles to prevent occurrence of the filming phenomenon.
Inventors
- 👤 Hisashi Myochin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:25
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0035; G03G2221/00; G03G2221/0005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
90 words
In an apparatus for removing residual toner from a surface to be cleaned which comprises a rotatable cleaning brush in frictional engagement with the surface for removing residual toner therefrom, a dusting bar disposed in abutting relation to brush bristles of said cleaning brush for dusting toner off said brush bristles, both said dusting bar and said brush bristles being made of electrically conductive material with at least one covered with an insulating material, and means for forming an alternating electric field between said brush bristles and said dusting bar.
Claim 2
Dependent Claim
90 words
In an apparatus for removing residual toner from a surface to be cleaned which comprises a rotatable cleaning brush in frictional engagement with the surface for removing residual toner therefrom, a dusting bar disposed in abutting relation to brush bristles of said cleaning brush for dusting toner off said brush bristles, both said dusting bar and said brush bristles being made of electrically conductive material with at least one covered with an insulating material, and means for forming an alternating electric field between said brush bristles and said dusting bar.
Claim 3
Dependent Claim
123 words
In an apparatus for removing residual toner from a surface to be cleaned which comprises a rotatable cleaning brush in frictional engagement with the surface for removing residual toner therefrom, a dusting bar disposed parallelly with respect to a rotating axis of said cleaning brush and in abutting relation to brush bristles of said cleaning brush for dusting toner off said brush bristles, both said dusting bar and said brush bristles being made of electrically conductive material with at least one covered with an insulating material, and means for forming an alternating electric field between said brush bristles and said dusting bar and including an AC power source connected to either said brush bristles or said dusting bar with the other electrically grounded.
Claim 4
Dependent Claim
123 words
In an apparatus for removing residual toner from a surface to be cleaned which comprises a rotatable cleaning brush in frictional engagement with the surface for removing residual toner therefrom, a dusting bar disposed parallelly with respect to a rotating axis of said cleaning brush and in abutting relation to brush bristles of said cleaning brush for dusting toner off said brush bristles, both said dusting bar and said brush bristles being made of electrically conductive material with at least one covered with an insulating material, and means for forming an alternating electric field between said brush bristles and said dusting bar and including an AC power source connected to either said brush bristles or said dusting bar with the other electrically grounded.
Claim 5
Dependent Claim
23 words
The apparatus as claimed in claim 2 wherein each of said brush bristles has an electrically conductive portion sandwiched between electrically insulating portions.
Claim 6
Dependent Claim
24 words
The apparatus as claimed in claim 2 wherein each of said brush bristles has an electrically conductive portion covered entirely with an insulating material.
Claim 7
Dependent Claim
26 words
The apparatus as claimed in claim 2 wherein voltage supplied for said AC power source is in the range of about 4.5 KV to 8 KV.
References Cited (Backward Citations)
US3780391A
Cited
US4123154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |