US4336565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charge process with a carbon fiber brush electrode
Assignee: Xerox Corp
•
Filing: 1980-08-04
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Granted: 1982-06-22
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Expires: 2000-08-04
Abstract
Abstract A process of imposing an electrical charge on an electrically insulating surface of a moving web wherein a brush electrode contacts the surface. The brush is made up of extremely soft and flexible fiber filaments comprising carbon mounted on a metallic brace which also serves as an electrical contact to supply the brush with d.c. potential whereby the electrically insulating surface is charged to nearly the potential applied to the brush. In order to improve charge uniformity the brush is oscillated in a direction transverse to the direction of web movement.
Inventors
- 👤 Hugh Murray
- 👤 Lawrence M. Marks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:21
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/02; G03G15/0208; G03G15/0216; G03G15/0233; G03G2215/00; G03G2215/02; G03G2215/021; G03G2215/023
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
62 words
A process for applying an electrostatic charge on the electrically insulating surface of a moving web which comprises contacting the surface with at least one brush electrode raised to an applied potential, said brush electrode being made with electrically conductive carbon fiber filaments, and oscillating said at least one brush electrode in a direction transverse to the direction of the web movement.
Claim 2
Dependent Claim
62 words
A process for applying an electrostatic charge on the electrically insulating surface of a moving web which comprises contacting the surface with at least one brush electrode raised to an applied potential, said brush electrode being made with electrically conductive carbon fiber filaments, and oscillating said at least one brush electrode in a direction transverse to the direction of the web movement.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the applied potential is in the range of from about 400 to about 10,000 volts.
Claim 4
Dependent Claim
14 words
The process of claim 1 wherein the carbon fiber filaments are derived from cellulose.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein the carbon fiber filaments are derived from polypropylene.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein the fiber filaments have a diameter in the range of from about 7 microns to about 10 microns.
Claim 7
Dependent Claim
15 words
The process of claim 1 wherein the filaments have a length of about 1 cm.
Claim 8
Dependent Claim
16 words
The process of claim 1 wherein a plurality of said brush electrodes contact said surface sequentially.
References Cited (Backward Citations)
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Cited
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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) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |