US3613638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Materials for fibrous development member
Assignee: Xerox Corp
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Filing: 1969-10-27
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Granted: 1971-10-19
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Expires: 1989-10-27
Abstract
Abstract In a device for developing electrostatic latent charge patterns, a fibrous development member comprising woven pile material, the fiber elements of which comprise composite combinations of conductive and insulating materials, such as glass and steel.
Inventors
- 👤 Thomas W Solarek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:09
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0805
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
Apparatus for developing a latent electrostatic charge pattern formed on a support surface comprising: a brush element having a fibrous surface, said brush fibers being a composite of fibers of conductive and insulating materials, means for supporting said brush element adjacent said support surface, means for impregnating the brush element with a powder developing material, said fibrous surface adapted to hold thereon by electrostatic attraction powdered material during impregnation and adapted to release said powder material for development of an electrostatic latent image, and means for bringing the brush element in surface contact with the support surface, thereby depositing the developing material on said latent charge pattern.
Claim 2
Dependent Claim
107 words
Apparatus for developing a latent electrostatic charge pattern formed on a support surface comprising: a brush element having a fibrous surface, said brush fibers being a composite of fibers of conductive and insulating materials, means for supporting said brush element adjacent said support surface, means for impregnating the brush element with a powder developing material, said fibrous surface adapted to hold thereon by electrostatic attraction powdered material during impregnation and adapted to release said powder material for development of an electrostatic latent image, and means for bringing the brush element in surface contact with the support surface, thereby depositing the developing material on said latent charge pattern.
Claim 3
Dependent Claim
26 words
The apparatus as defined in claim 1 wherein said insulating fiber materials are selected from the group consisting of glass, rayon, nylon, orlon, wool and arnel.
Claim 4
Dependent Claim
12 words
Apparatus as defined in claim 2 wherein said insulating fibers comprise glass.
Claim 5
Dependent Claim
26 words
The apparatus as defined in claim 1 wherein said conductive fiber materials are selected from the group consisting of graphite, steel, copper, chromium, silver and aluminum.
Claim 6
Dependent Claim
13 words
The device as defined in claim 4 wherein said conductive fibers comprise steel.
Claim 7
Dependent Claim
19 words
The apparatus as defined in claim 1 wherein said insulating fibers comprise glass and said conductive fibers comprise steel.
Claim 8
Dependent Claim
27 words
The apparatus as defined in claim 6 wherein the percentage of steel fibers in the composite brush is in the range from about 0.5 to about 4.2.
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 |