US5216467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brush-based carrier bead removal device for a developer housing in a xerographic apparatus
Assignee: Xerox Corp
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Filing: 1992-01-30
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Granted: 1993-06-01
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Expires: 2012-01-30
Abstract
Abstract A device prevents the migration of particles from the edge of a moving surface, such as a photoreceptor in an electrophotographic printing apparatus. A brush in contact with an edge of the surface includes fibers of a first type, and fibers of a second type. The fibers of the second type are less resilient than those of the first type and substantially incapable of abrading the surface. The brush guides the particles toward a bead-removal device.
Inventors
- 👤 James R. Esser
- 👤 Wayne A. Morganti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:23
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0896; G03G15/0898; G03G15/095
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
147 words
In an electrophotographic printing apparatus having a movable photoreceptor surface and developer means for conveying to the photoreceptor surface a developer material comprising carrier particles and toner material, the developer means being substantially enclosed in a developer housing, a device for preventing the migration of carrier particles out of the developer housing, comprising: means for removing carrier particles from the photoreceptor surface, disposed substantially within the developer housing, extending substantially across the photoreceptor surface; and a brush, disposed between the developer means and the removing means, in contact with the photoreceptor surface adjacent an edge thereof, the brush including fibers of a first type and fibers of a second type, with the fibers of the second type being less resilient than those of the first type and substantially incapable of abrading the photoreceptor surface, the brush being adapted to guide the carrier particles to the removing means.
Claim 2
Dependent Claim
147 words
In an electrophotographic printing apparatus having a movable photoreceptor surface and developer means for conveying to the photoreceptor surface a developer material comprising carrier particles and toner material, the developer means being substantially enclosed in a developer housing, a device for preventing the migration of carrier particles out of the developer housing, comprising: means for removing carrier particles from the photoreceptor surface, disposed substantially within the developer housing, extending substantially across the photoreceptor surface; and a brush, disposed between the developer means and the removing means, in contact with the photoreceptor surface adjacent an edge thereof, the brush including fibers of a first type and fibers of a second type, with the fibers of the second type being less resilient than those of the first type and substantially incapable of abrading the photoreceptor surface, the brush being adapted to guide the carrier particles to the removing means.
Claim 3
Dependent Claim
58 words
A device as in claim 1, wherein the fibers of the first type are substantially disposed in at least one row along the direction of movement of the photoreceptor surface, and the fibers of the second type are substantially disposed in at least one row adjacent to the at least one row of fibers of the first type.
Claim 4
Dependent Claim
24 words
A device as in claim 1, wherein the fibers of the first type and the second type are greater than 15 millimeters in length.
Claim 5
Dependent Claim
28 words
A device as in claim 1, wherein the fibers of the first type are of a density at least twice that of the fibers of the second type.
Claim 6
Dependent Claim
29 words
A device as in claim 1, wherein the fibers of the first type are of a cross-sectional area at least twice that of the fibers of the second type.
Claim 7
Dependent Claim
25 words
A device as in claim 1, wherein the fibers of the second type are in the form of filaments which are generally round in cross-section.
Claim 8
Dependent Claim
17 words
A device as in claim 1, wherein the fibers of the first type are trilobal in cross-section.
Claim 9
Dependent Claim
20 words
A device as in claim 1, wherein the fibers of the first type and the second type comprise polypropylene filaments.
Claim 10
Dependent Claim
114 words
In an electrophotographic printing apparatus having a movable photoreceptor surface and means for removing carrier particles from the photoreceptor surface, a developer unit comprising: developer means for conveying to the photoreceptor surface a developer material comprising carrier particles and toner material; and a brush, disposed between the developer means and the removing means, in contact with the photoreceptor surface adjacent an edge thereof, the brush including fibers of a first type and fibers of a second type, with the fibers of the second type being less resilient than those of the first type and substantially incapable of abrading the photoreceptor surface, the brush being adapted to guide the carrier particles to the removing means.
Claim 11
Dependent Claim
114 words
In an electrophotographic printing apparatus having a movable photoreceptor surface and means for removing carrier particles from the photoreceptor surface, a developer unit comprising: developer means for conveying to the photoreceptor surface a developer material comprising carrier particles and toner material; and a brush, disposed between the developer means and the removing means, in contact with the photoreceptor surface adjacent an edge thereof, the brush including fibers of a first type and fibers of a second type, with the fibers of the second type being less resilient than those of the first type and substantially incapable of abrading the photoreceptor surface, the brush being adapted to guide the carrier particles to the removing means.
Claim 12
Dependent Claim
59 words
A developer unit as in claim 9, wherein the fibers of the first type are substantially disposed in at least one row extending in the direction of motion of the surface, and the fibers of the second type are substantially disposed in at least one row adjacent to the at least one row of fibers of the first type.
Claim 13
Dependent Claim
29 words
A developer unit as in claim 9, wherein the fibers of the first type are of a density at least twice that of the fibers of the second type.
Claim 14
Dependent Claim
30 words
A developer unit as in claim 9, wherein the fibers of the first type are of a cross-sectional area at least twice that of the fibers of the second type.
Claim 15
Dependent Claim
19 words
A developer unit as in claim 9, wherein the fibers of the second type are generally round in cross-section.
Claim 16
Dependent Claim
18 words
A developer unit as in claim 9, wherein the fibers of the first type are trilobal in cross-section.
Claim 17
Dependent Claim
21 words
A developer unit as in claim 9, wherein the fibers of the first type and the second type comprise polypropylene filaments.
Claim 18
Dependent Claim
54 words
A developer unit as in claim 9, comprising a central row of fibers of the second type, two side rows of fibers of the first type on either side of the central row, and two outer rows of fibers of the second type on the sides of the side rows opposite the central row.
References Cited (Backward Citations)
US3614221A
Cited
US3834804A
Cited
US3894513A
Cited
US4244074A
Cited
US4673284A
Cited
US4361922A
Cited
US4400082A
Cited
US4407219A
Cited
JPS5965872A
Cited
US4480351A
Cited
JPS60677A
Cited
US4616919A
Cited
US4861179A
Cited
US4681426A
Cited
US4829338A
Cited
US5029316A
Cited
US5034779A
Cited
US5128725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-31 | 2004-11-30 | 2005-06-01 | $7700.00 | Window Closed / Lapsed |