Patent US5122839A successfully refreshed from Google Patents.
US5122839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual action blade cleaner
Assignee: Xerox Corp
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Filing: 1991-04-22
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Granted: 1992-06-16
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Expires: 2011-04-22
Abstract
Abstract A cleaning blade having a dual action cleaning blade. One side of the cleaning blade is coated with an abrasive material. The cleaning blade is used in an electrophotographic printing machine to remove residual particles from a photoconductive surface.
Inventors
- 👤 Robert P. Siegel
- 👤 Bruce E. Thayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:04
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0011; G03G21/0017
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
85 words
An electrophotographic printing machine of the type having a movable photoconductive surface with residual particles thereon, wherein the improvement for removal of said residual particles comprises: means for cleaning residual particles from the photoconductive surface, said cleaning means having a cleaning surface and an abrading surface; and means for providing bidirectional relative movement between the photoconductive surface and a blade so that in one direction said abrading surface engages the photoconductive surface and in the other direction a said cleaning surface engages the photoconductive surface.
Claim 2
Dependent Claim
85 words
An electrophotographic printing machine of the type having a movable photoconductive surface with residual particles thereon, wherein the improvement for removal of said residual particles comprises: means for cleaning residual particles from the photoconductive surface, said cleaning means having a cleaning surface and an abrading surface; and means for providing bidirectional relative movement between the photoconductive surface and a blade so that in one direction said abrading surface engages the photoconductive surface and in the other direction a said cleaning surface engages the photoconductive surface.
Claim 3
Dependent Claim
42 words
A printing machine as recited in claim 1, wherein said cleaning means includes: a frame; and a dual action cleaning blade, having one free end defining an edge, pressing against the photoconductive surface with the other end being supported on said frame.
Claim 4
Dependent Claim
22 words
A printing machine as recited in claim 2, wherein said dual action cleaning blade has an abrading surface and a cleaning surface.
Claim 5
Dependent Claim
13 words
A printing machine as recited in claim 3, wherein said blade is flexible.
Claim 6
Dependent Claim
37 words
A printing machine as recited in claim 4, wherein the flexible blade has a thickness ranging from about 0.040 to 0.150 inches; and the free length extension from the blade holder is about 0.2 to 0.6 inches.
Claim 7
Dependent Claim
14 words
A printing machine as recited in claim 3, wherein said blade is substantially inflexible.
Claim 8
Dependent Claim
38 words
A printing machine as recited in claim 6, wherein the substantially inflexible blade has a thickness ranging from about 0.40 to 0.150 inches; and the free length extension from the blade holder is about 0.2 to 0.6 inches.
Claim 9
Dependent Claim
15 words
A printing machine as recited in claim 3, wherein said blade material is an elastomer.
Claim 10
Dependent Claim
24 words
A printing machine as recited in claim 8, wherein said elastomer is chosen from the group of materials consisting of Polyester and Polyether Polyurethanes.
Claim 11
Dependent Claim
24 words
A printing machine as recited in claim 3, wherein the abrading surface is created by an abrasive coating on one side of said blade.
Claim 12
Dependent Claim
33 words
A printing machine as recited in claim 10, wherein said abrasive coating material is chosen from the group of materials consisting of aluminum oxide, silicon carbide, diamond, emery, corundum, quartz and garnet grits.
Claim 13
Dependent Claim
68 words
A printing machine as recited in claim 10, wherein to remove stubborn debris particles a reversal of the photoconductive surface direction of movement causes the free end of said blade in a flexible wiper mode to flip to the abrasive coating side such that the abrasive coating side of said free end of said blade presses against the photoconductive surface defining an edge to remove the stubborn particles.
Claim 14
Dependent Claim
69 words
A printing machine as recited in claim 10, wherein to remove stubborn debris particles a reversal of the photoconductive surface direction of movement causes the free end of said blade in a substantially inflexible wiper mode to flip to the abrasive coating side such that the abrasive coating side of said free end of said blade presses against the photoconductive surface defining an edge to remove the stubborn particles.
Claim 15
Dependent Claim
67 words
A printing machine as recited in claim 10, wherein to remove stubborn debris particles a reversal of the photoconductive surface direction of movement causes the free end of said blade, in a doctor mode, to switch to a wiper blade orientation causing the abrasive coating side of said free end of said blade to press against the photoconductive surface defining an edge to remove the stubborn particles.
Claim 16
Dependent Claim
53 words
A dual function blade adapted to remove contaminates from a surface, comprising: an abrading surface; a cleaning surface; and means for providing bidirectional relative movement between the surface and the blade so that in one direction said abrading surface engages the surface and in the other direction said cleaning surface engages the surface.
Claim 17
Dependent Claim
53 words
A dual function blade adapted to remove contaminates from a surface, comprising: an abrading surface; a cleaning surface; and means for providing bidirectional relative movement between the surface and the blade so that in one direction said abrading surface engages the surface and in the other direction said cleaning surface engages the surface.
Claim 18
Dependent Claim
14 words
A dual function blade as recited in claim 15, wherein said blade is flexible.
Claim 19
Dependent Claim
38 words
A dual function blade as recited in claim 16, wherein the flexible blade has a thickness ranging from about 0.040 to 0.150 inches; and the free length extension from the blade holder is about 0.2 to 0.6 inches.
Claim 20
Dependent Claim
15 words
A dual function blade as recited in claim 15, wherein said blade is substantially inflexible.
Claim 21
Dependent Claim
39 words
A dual function blade as recited in claim 18, wherein the substantially inflexible blade has a thickness ranging from about 0.40 to 0.150 inches; and the free length extension from the blade holder is about 0.2 to 0.6 inches.
Claim 22
Dependent Claim
25 words
A dual function blade as recited in claim 15, wherein the abrading surface is created by an abrasive coating on one side of said blade.
Claim 23
Dependent Claim
34 words
A dual function blade as recited in claim 20, wherein said abrasive coating material is chosen from the group of materials consisting of aluminum oxide, silicon carbide, diamond, emery, corundum, quartz and garnet grits.
Claim 24
Dependent Claim
16 words
A dual function blade as recited in claim 15, wherein said blade material is an elastomer.
Claim 25
Dependent Claim
26 words
A dual function blade as recited in claim 22, wherein said elastomer material is chosen from the group of materials consisting of Polyester and Polyether Polyurethanes.
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) | 1995-06-16 | 1995-12-16 | 1996-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-16 | 1999-12-16 | 2000-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-16 | 2003-12-16 | 2004-06-16 | $7700.00 | Window Closed / Lapsed |