US4970560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricated metal cleaning blade for use in dry electrophotographic processes
Assignee: Xerox Corp
•
Filing: 1988-12-22
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Granted: 1990-11-13
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Expires: 2008-12-22
Abstract
Abstract A coating process for the manufacture of cleaning blades is used where a hardened material coating is electro-deposited onto a carbon steel cleaning blade. The coating process is selected to provided a microporous surface. The pores thus produced are enlarged. The surface is sealed with sub-micron size particles of fluorocarbons, heat treated to create a smooth, slippery surface, while the hardened metal coating provides wear resistance to friction encountered during cleaning operation.
Inventors
- 👤 Nero R. Lindblad
- 👤 Herbert C. Relyea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:55
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0011; G03G21/0017
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
53 words
A cleaning blade for use in removal of dry toner from an imaging surface in an electrostatographic device, said cleaning blade comprising: a metal substrate; a hard metal coating, deposited on the metal substrate and providing large number of pores; and a lubricant layer, infused into the pores of the hard metal coating.
Claim 2
Dependent Claim
53 words
A cleaning blade for use in removal of dry toner from an imaging surface in an electrostatographic device, said cleaning blade comprising: a metal substrate; a hard metal coating, deposited on the metal substrate and providing large number of pores; and a lubricant layer, infused into the pores of the hard metal coating.
Claim 3
Dependent Claim
16 words
A cleaning blade as described in claim 1 wherein said metal substrate is a carbon steel.
Claim 4
Dependent Claim
21 words
A cleaning blade as described in claim 2 wherein said metal substrate is carbon steel, cut to desired shape and size.
Claim 5
Dependent Claim
27 words
A cleaning blade as described in claim 1 wherein the a hard metal coating is selected to provide a Rockwell hardness in the range of Rc 50-Rc70.
Claim 6
Dependent Claim
17 words
A cleaning blade as described in claim 1 wherein said hard metal coating is a phosphorus nickel.
Claim 7
Dependent Claim
18 words
A cleaning blade as described in claim 1 wherein said hard metal coating is a chrome nickel alloy.
Claim 8
Dependent Claim
15 words
A cleaning blade as described in claim 1 wherein said lubricant layer is a fluorocarbon.
Claim 9
Dependent Claim
13 words
A cleaning blade as described in claim 1, wherein said lubricant is polytetrafluoroethylene.
Claim 10
Independent Claim
68 words
A method of making a hard metal lubricated cleaning blade for use in removing dry toner from an imaging surface in an electrostatographic device including the steps: providing a metal substrate cut to desired shape and dimension; electro-depositing a hard metal coating over said metal substrate, providing a generally micro porous surface; and infusing a layer of lubricant material into the porous surface of the hard metal coating.
Claim 11
Independent Claim
68 words
A method of making a hard metal lubricated cleaning blade for use in removing dry toner from an imaging surface in an electrostatographic device including the steps: providing a metal substrate cut to desired shape and dimension; electro-depositing a hard metal coating over said metal substrate, providing a generally micro porous surface; and infusing a layer of lubricant material into the porous surface of the hard metal coating.
Claim 12
Dependent Claim
24 words
The method as described in claim 9 and including the further step of grinding and lapping cut edges of the metal substrate for squareness.
Claim 13
Dependent Claim
26 words
The method as described in claim 9 and including the further step of cleaning the surface of the substrate prior to electrodeposition the hard metal coating.
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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) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |