Patent US4615613A successfully refreshed from Google Patents.
US4615613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charge particle removal device
Assignee: XERX Corp A CORP OF NEW YORK
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Filing: 1985-04-05
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Granted: 1986-10-07
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Expires: 2005-04-05
Abstract
Abstract Cleaning apparatus for removing residual toner particles from a charge retentive surface. The apparatus utilizes a cleaning brush to which an electrical bias is applied in order to enhance the toner removal. The brush has different biases applied thereto in accordance with the area of the charge retentive surface being cleaned. Thus, when toner is being removed from the document area of the charge retentive surface, one bias level is applied and when the interdocument area is being cleaned a different bias is applied thereby increasing the cleaning latitude.
Inventors
- 👤 Paul A. Garsin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:37
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/06; G03G21/0005; G03G21/0035
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
102 words
Method of removing toner from a charge retentive surface with areas having different charge levels, said method comprising the steps of: moving a charge retentive surface having successive document areas and interdocument areas thereon in an endless path; contacting said charge retentive surface with a cleaning structure; electrically biasing said cleaning structure at a first predetermined bias level while said cleaning structure is in contact with a document area of said charge retentive surface; and electrically biasing said cleaning structure to a second predetermined bias level while said cleaning structure is in contact with an interdocument area of said charge retentive surface.
Claim 2
Dependent Claim
102 words
Method of removing toner from a charge retentive surface with areas having different charge levels, said method comprising the steps of: moving a charge retentive surface having successive document areas and interdocument areas thereon in an endless path; contacting said charge retentive surface with a cleaning structure; electrically biasing said cleaning structure at a first predetermined bias level while said cleaning structure is in contact with a document area of said charge retentive surface; and electrically biasing said cleaning structure to a second predetermined bias level while said cleaning structure is in contact with an interdocument area of said charge retentive surface.
Claim 3
Dependent Claim
70 words
Apparatus for removing residual toner from a charge retentive surface, said apparatus comprising: a cleaning member; means for moving a charge retentive surface past said cleaning member whereby document areas and interdocument areas of said surface move therepast; and means for applying either of a first and second predetermined voltage bias to said cleaning member in accordance with the movement of said document and interdocument areas past said cleaning member.
Claim 4
Dependent Claim
70 words
Apparatus for removing residual toner from a charge retentive surface, said apparatus comprising: a cleaning member; means for moving a charge retentive surface past said cleaning member whereby document areas and interdocument areas of said surface move therepast; and means for applying either of a first and second predetermined voltage bias to said cleaning member in accordance with the movement of said document and interdocument areas past said cleaning member.
Claim 5
Dependent Claim
18 words
Apparatus according to claim 2 wherein said first voltage bias is more positive than said second voltage bias.
Claim 6
Dependent Claim
29 words
Apparatus according to claim 3 wherein said first voltage bias is approximatley equal to -220 volts d.c. and said second voltage bias is approximately equal to -320 volts d.c.
Claim 7
Dependent Claim
13 words
Apparatus according to claim 3 wherein said cleaning member comprises a magnetic brush.
Claim 8
Dependent Claim
19 words
The method according to claim 1 wherein said first bias level is more positive than said second bias level.
Claim 9
Dependent Claim
28 words
The method according to claim 6 wherein said first bias level is approximately -220 volts d.c. an said second bias level is approximately equal to -320 volts d.c.
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) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |