Patent US4777100A successfully refreshed from Google Patents.
Patent US4956671A successfully refreshed from Google Patents.
US4956671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire cleaning device for a corona discharge type charger
Assignee: Ricoh Co Ltd
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Filing: 1988-10-27
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Granted: 1990-09-11
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Expires: 2008-10-27
Abstract
Abstract A device for cleaning a wire of a corona discharge type charger installed in an electrophotographic copier or similar image recording apparatus such as a charger for charging a photoconductive element, a transfer charger or a separation charger. The device includes a pair of cleaning pads which clean the wire by individually holding diametrically opposite portions of the periphery of the wire, i.e. a portion which faces the surface of the photoconductive element to be charged and a portion which is remote from the surface of the same element. The cleaning pads act on the wire only when the pads and the wire are moved in one predetermined direction relative to each other.
Inventors
- 👤 Hirohisa Otsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:50
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/02; G03G15/0258; G03G15/0291
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
159 words
In a device for cleaning a wire of a charger having a shield case formed with an opening which faces a surface of a photoconductive element of an image recording apparatus to be charged and extends over substantially an entire length of the surface of said photoconductive element, and a wire extending within and in a lengthwise direction of said shield case, wherein the improvement comprises: movable cleaning members movable into and out of contact with a portion of said wire which faces the surface of said photoconductive element and a portion which is diametrically opposite to said first-mentioned portion, respectively, and movable relative to said wire; rotable support means for slidably engaging said cleaning members with said wire when said movable cleaning members are moved in one direction relative to said wire; and means for spacing apart said cleaning members from said wire when said movable cleaning members are moved in the other direction relative to said wire.
Claim 2
Dependent Claim
159 words
In a device for cleaning a wire of a charger having a shield case formed with an opening which faces a surface of a photoconductive element of an image recording apparatus to be charged and extends over substantially an entire length of the surface of said photoconductive element, and a wire extending within and in a lengthwise direction of said shield case, wherein the improvement comprises: movable cleaning members movable into and out of contact with a portion of said wire which faces the surface of said photoconductive element and a portion which is diametrically opposite to said first-mentioned portion, respectively, and movable relative to said wire; rotable support means for slidably engaging said cleaning members with said wire when said movable cleaning members are moved in one direction relative to said wire; and means for spacing apart said cleaning members from said wire when said movable cleaning members are moved in the other direction relative to said wire.
Claim 3
Dependent Claim
24 words
A device as claimed in claim 1, wherein said rotatable support means is rotatable about an axis which is substantially perpendicular to said wire.
Claim 4
Dependent Claim
48 words
A device as claimed in claim 1, wherein the movement of said movable cleaning members relative to the wire is caused by securely fastening said device to a body of said image recording apparatus and mounting and dismounting said charger from said body of said image recording apparatus.
Claim 5
Dependent Claim
32 words
A device as claimed in claim 1, which comprises means for moving said device in a lengthwise direction of said charger so as to move said cleaning members relative to said wire.
References Cited (Backward Citations)
JPS5451851A
Cited
JPS54104833A
Cited
JPS54116938A
Cited
JPS54146635A
Cited
JPS58163964A
Cited
US4788573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |