US5469247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toned member cleaning by electrified roller
Assignee: Lexmark International Inc
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Filing: 1994-07-05
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Granted: 1995-11-21
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Expires: 2014-07-05
Abstract
Abstract Cleaning roller (7) contacts intermediate transfer roller (4), each rotating at the same surface speed to avoid rubbing. The cleaning roller has an electric potential sufficient to remove toner from the transfer roller to clean it. Silicone oil is applied by a roller 29, which is wetted by oil from a oil impregnated wiper (31). The oil facilitates cleaning and reduces wear of the intermediate transfer roller, which is typically soft to facilitate transfer.
Inventors
- 👤 Kuangti T. Cheng
- 👤 Ashok Murthy
- 👤 Jeanne M. Saldanha-Singh
- 👤 Pramod K. Sharma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:53
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1605; G03G15/161
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
146 words
Electrophotographic imaging apparatus comprising a developer station to apply toner to develop electrostatic images into toned images, an endless toned member to receive said toned images and to transfer said toned images to another substrate at a transfer station, an endless cleaning member positioned past said transfer station, said cleaning member having a smooth outer surface in contact with said toned member, a source of electrical potential to bias said cleaning member to remove toner at said toned image to said cleaning member, means to rotate said cleaning member and said toned member at essentially the same surface speed and in the same direction where said toned member and said cleaning member are in contact, and an applicator station to apply an alkyl siloxane oil to said toner member located at or past said cleaning member and prior to said toned member receiving said toned images.
Claim 2
Dependent Claim
146 words
Electrophotographic imaging apparatus comprising a developer station to apply toner to develop electrostatic images into toned images, an endless toned member to receive said toned images and to transfer said toned images to another substrate at a transfer station, an endless cleaning member positioned past said transfer station, said cleaning member having a smooth outer surface in contact with said toned member, a source of electrical potential to bias said cleaning member to remove toner at said toned image to said cleaning member, means to rotate said cleaning member and said toned member at essentially the same surface speed and in the same direction where said toned member and said cleaning member are in contact, and an applicator station to apply an alkyl siloxane oil to said toner member located at or past said cleaning member and prior to said toned member receiving said toned images.
Claim 3
Dependent Claim
30 words
The electrophotographic imaging apparatus as in claim 1 also comprising a cleaning blade contacting said cleaning member away from said endless toned member to scrape toner from said cleaning member.
Claim 4
Dependent Claim
61 words
The electrophotographic imaging apparatus as in claim 2 in which said applicator station comprises a perfluoroalkyl resin coated roller in contact with said toned member and means to apply said oil to the surface of said perfluoroalkyl resin coated roller, said means to apply oil being spaced from the location of contact of said resin coated roller and said toned member.
Claim 5
Dependent Claim
19 words
The electrophotographic imaging apparatus as in claim 3 in which said applicator station is located past said cleaning member.
Claim 6
Dependent Claim
18 words
The electrophotographic imaging apparatus as in claim 3 in which said toned member is an intermediate transfer member.
Claim 7
Dependent Claim
18 words
The electrophotographic imaging apparatus as in claim 4 in which said toned member is an intermediate transfer member.
Claim 8
Dependent Claim
19 words
The electrophotographic imaging apparatus as in claim 2 in which said applicator station is located past said cleaning member.
Claim 9
Dependent Claim
18 words
The electrophotographic imaging apparatus as in claim 7 in which said toned member is an intermediate transfer member.
Claim 10
Dependent Claim
18 words
The electrophotographic imaging apparatus as in claim 2 in which said toned member is an intermediate transfer member.
Claim 11
Dependent Claim
19 words
The electrophotographic imaging apparatus as in claim 1 in which said applicator station is located past said cleaning member.
Claim 12
Dependent Claim
18 words
The electrophotographic imaging apparatus as in claim 10 in which said toned member is an intermediate transfer member.
Claim 13
Dependent Claim
18 words
The electrophotographic imaging apparatus as in claim 1 in which said toned member is an intermediate transfer member.
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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) | 1998-11-20 | 1999-05-22 | 1999-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-20 | 2003-05-22 | 2003-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-20 | 2007-05-22 | 2007-11-21 | $7700.00 | Window Closed / Lapsed |