US4384545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Development system
Assignee: Xerox Corp
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Filing: 1979-08-03
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Granted: 1983-05-24
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Expires: 1999-08-03
Abstract
Abstract An apparatus which develops image areas recorded on a surface by transporting a developer material into contact therewith. The apparatus includes a conductive member and an insulating member spaced therefrom. Developer material transported by the conductive member develops the solid regions of the image areas. The insulating member removes developer material from the non-image areas and develops the lines in the image areas with the developer material.
Inventors
- 👤 Paul W. Burnham
- 👤 Richard P. Germain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:32
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
An apparatus for developing an electrostatic latent image recorded on a photoconductive surface with a developer material, including: conductive means having the developer material adhering removably on the exterior surface thereof, said conductive means transporting the developer material into contact with the photoconductive surface so as to optimize development of solid areas within the electrostatic latent image, said conductive means includes a first magnetic member, a rotatable non-magnetic, conductive tubular member having said first magnetic member disposed interiorly thereof, and means for rotating said conductive tubular member relative to said first magnetic member; and insulating means, spaced from said conductive means and having the developer material adhering removably on the exterior surface thereof, said insulating means transporting developer material into contact with the photoconductive surface to develop the lines in the electrostatic latent image.
Claim 2
Independent Claim
134 words
An apparatus for developing an electrostatic latent image recorded on a photoconductive surface with a developer material, including: conductive means having the developer material adhering removably on the exterior surface thereof, said conductive means transporting the developer material into contact with the photoconductive surface so as to optimize development of solid areas within the electrostatic latent image, said conductive means includes a first magnetic member, a rotatable non-magnetic, conductive tubular member having said first magnetic member disposed interiorly thereof, and means for rotating said conductive tubular member relative to said first magnetic member; and insulating means, spaced from said conductive means and having the developer material adhering removably on the exterior surface thereof, said insulating means transporting developer material into contact with the photoconductive surface to develop the lines in the electrostatic latent image.
Claim 3
Dependent Claim
20 words
An apparatus as recited in claim 1, wherein said conductive means includes means for electrically biasing said conductive tubular member.
Claim 4
Independent Claim
46 words
An apparatus as recited in claims 1 or 2, wherein said insulating means includes: a second magnetic member; a rotatable non-magnetic, insulating tubular member having said second magnetic member disposed interiorly thereof; and means for rotating said insulating tubular member relative to said second magnetic member.
Claim 5
Dependent Claim
18 words
An apparatus as recited in claim 3, wherein said insulating tubular member is made from a phenolic resin.
Claim 6
Dependent Claim
39 words
An apparatus as recited in claim 3, further including a blade having the leading edge thereof disposed closely adjacent to said insulating tubular member to meter the quantity of developer material being transported thereby, said blade being electrically floating.
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) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |