US3614221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging system
Assignee: Xerox Corp
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Filing: 1969-12-30
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Granted: 1971-10-19
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Expires: 1989-12-30
Abstract
Abstract A woven pile brush for the brush development of latent electrostatic images is provided with both nonconductive and conductive pile fibers. The conductive pile fibers are shorter than the nonconductive fibers, and thus, the shorter conductive fibers can function as a development electrode while avoiding contact with the latent electrostatic image carrier.
Inventors
- 👤 Thomas W Solarek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:51
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0805
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
56 words
A pile fabric brush having first pile fibers that are electrically substantially nonconductive, and second pile fibers that are electrically conductive, said first pile fibers being all of substantially one pile height, said second pile fibers being all of substantially a second pile height, and said second pile height being less than said first pile height.
Claim 2
Dependent Claim
56 words
A pile fabric brush having first pile fibers that are electrically substantially nonconductive, and second pile fibers that are electrically conductive, said first pile fibers being all of substantially one pile height, said second pile fibers being all of substantially a second pile height, and said second pile height being less than said first pile height.
Claim 3
Dependent Claim
18 words
A brush as set forth in claim 1, wherein said pile fabric is a woven cut pile material.
Claim 4
Dependent Claim
16 words
A brush as set forth in claim 2, wherein said second pile fibers are metallic filaments.
Claim 5
Dependent Claim
16 words
A brush as set forth in claim 2, wherein said first pile fibers are synthetic filaments.
Claim 6
Dependent Claim
37 words
A brush as set forth in claim 4, wherein said second pile fibers are metallic filaments. A a brush as set forth in claim 5, wherein said synthetic filaments are rayon and said metallic filaments are steel.
Claim 7
Dependent Claim
105 words
In an electrostatic xerographic apparatus having a brush for the application of electroscopic toner developer particles to the surface of an electrostatic image-bearing surface, the improvement wherein said brush has a pile formed from two different fibers, a first of said pile fibers all having substantially the same pile height and being substantially electrically nonconductive and triboelectric for dusting said toner particles over said surface, the second of said pile fibers all having substantially the same pile height and being electrically conductive to provide a development electrode, and the pile height of said second fibers being less than the pile height of said first fibers.
Claim 8
Dependent Claim
105 words
In an electrostatic xerographic apparatus having a brush for the application of electroscopic toner developer particles to the surface of an electrostatic image-bearing surface, the improvement wherein said brush has a pile formed from two different fibers, a first of said pile fibers all having substantially the same pile height and being substantially electrically nonconductive and triboelectric for dusting said toner particles over said surface, the second of said pile fibers all having substantially the same pile height and being electrically conductive to provide a development electrode, and the pile height of said second fibers being less than the pile height of said first fibers.
Claim 9
Dependent Claim
18 words
In an apparatus as set forth in claim 7, said pile fabric being a woven cut pile material.
Claim 10
Dependent Claim
16 words
In an apparatus as set forth in claim 8, said second pile fibers being metallic filaments.
Claim 11
Dependent Claim
16 words
In an apparatus as set forth in claim 8, said first pile fibers being synthetic filaments.
Claim 12
Dependent Claim
16 words
In an apparatus as set forth in claim 10, said second pile fibers being metallic filaments.
Claim 13
Dependent Claim
24 words
In an apparatus as set forth in claim 11, said first pile fibers being rayon filaments and said second pile fibers being steel filaments.
Claim 14
Dependent Claim
41 words
In an apparatus as set forth in claim 7, said brush being positioned relative to said surface to place said first pile fibers in contact with said surface and said second pile fibers closely adjacent to but spaced from said surface.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |