Patent US4324490A successfully refreshed from Google Patents.
US4324490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Development system
Assignee: Xerox Corp
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Filing: 1980-04-28
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Granted: 1982-04-13
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Expires: 2000-04-28
Abstract
Abstract An apparatus in which developer material is guided to the free end regions of fibers to develop a latent image. The apparatus includes a tubular member having a ramp shaped member secured thereto for guiding the developer material to the fibers extending outwardly from the tubular member in the region of the latent image. An elongated magnetic member, disposed interiorly of the tubular member, rotates so as to transport developer material about the tubular member.
Inventors
- 👤 Paul W. Burnham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:38
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09; G03G15/0921; G03G15/0928
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
75 words
An apparatus for developing a latent image with developer material, including: means for transporting the developer material; a plurality of fibers extending outwardly from said transporting means with the free end regions of at least a portion of said fibers being closely adjacent to the latent image; and means, secured to said transporting means, for guiding the developer material being transported to the free end regions of said fibers to develop the latent image therewith.
Claim 2
Independent Claim
75 words
An apparatus for developing a latent image with developer material, including: means for transporting the developer material; a plurality of fibers extending outwardly from said transporting means with the free end regions of at least a portion of said fibers being closely adjacent to the latent image; and means, secured to said transporting means, for guiding the developer material being transported to the free end regions of said fibers to develop the latent image therewith.
Claim 3
Dependent Claim
13 words
An apparatus according to claim 1, wherein the developer material includes magnetic particles.
Claim 4
Dependent Claim
37 words
An apparatus according to claim 2, wherein said transporting means includes: an elongated tubular member having said guiding means secured thereto; and means for generating a magnetic field to attract said magnetic particles to said tubular member.
Claim 5
Dependent Claim
17 words
An apparatus according to claim 3, wherein said plurality of fibers are preferably electrically conductive and magnetic.
Claim 6
Dependent Claim
21 words
An apparatus according to claim 4, wherein said generating means includes an elongated magnetic member disposed interiorly of said tubular member.
Claim 7
Independent Claim
99 words
An apparatus for developing a latent image with developer material comprising at least magnetic particles, including: an elongated tubular member; an elongated magnetic member disposed interiorly of said tubular member for attracting the developer material; a plurality of electrically conductive and magnetic fibers extending outwardly from said tubular member with the free end regions of at least a portion of said fibers being closely adjacent to the latent image; and a ramp-shaped member secured to said tubular member in the region of said plurality of fibers to guide the developer material to the free end regions of said fibers.
Claim 8
Independent Claim
99 words
An apparatus for developing a latent image with developer material comprising at least magnetic particles, including: an elongated tubular member; an elongated magnetic member disposed interiorly of said tubular member for attracting the developer material; a plurality of electrically conductive and magnetic fibers extending outwardly from said tubular member with the free end regions of at least a portion of said fibers being closely adjacent to the latent image; and a ramp-shaped member secured to said tubular member in the region of said plurality of fibers to guide the developer material to the free end regions of said fibers.
Claim 9
Dependent Claim
12 words
An apparatus according to claim 6, wherein said tubular member is stationary.
Claim 10
Dependent Claim
13 words
An apparatus according to claim 7, including means for rotating said magnetic member.
Claim 11
Dependent Claim
32 words
An apparatus according to claim 8, wherein said plurality of fibers are grouped together to form a multiplicity of spaced tufts with each of said tufts having a multiplicity of said fibers.
Claim 12
Dependent Claim
15 words
An apparatus according to claim 9, wherein the spacing between adjacent tufts is substantially equal.
Claim 13
Dependent Claim
21 words
An apparatus according to claim 10, further including a fabric secured to said tubular member and having said tufts woven therethrough.
Claim 14
Dependent Claim
13 words
An apparatus according to claim 11, wherein said fabric includes a conductive coating.
Claim 15
Dependent Claim
18 words
An apparatus according to claim 12, wherein said tufts are woven through said fabric in a W-shaped configuration.
Claim 16
Dependent Claim
18 words
An apparatus according to claim 12, wherein said tufts are woven through said fabric in a U-shaped configuration.
Claim 17
Dependent Claim
17 words
An apparatus according to claim 13 or 14, wherein said fibers are made preferably from stainless steel.
Claim 18
Dependent Claim
95 words
An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a photoconductive member is developed with a developer material, wherein the improvement includes: means for transporting the developer material; a plurality of fibers extending outwardly from said transporting means with the end regions of at least a portion of said fibers being closely adjacent to the photoconductive member; and means, secured to said transporting means, for guiding the developer material being transported to the free end regions of said fibers to develop the latent image recorded on the photoconductive member.
Claim 19
Dependent Claim
95 words
An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a photoconductive member is developed with a developer material, wherein the improvement includes: means for transporting the developer material; a plurality of fibers extending outwardly from said transporting means with the end regions of at least a portion of said fibers being closely adjacent to the photoconductive member; and means, secured to said transporting means, for guiding the developer material being transported to the free end regions of said fibers to develop the latent image recorded on the photoconductive member.
Claim 20
Dependent Claim
14 words
A printing machine according to claim 16, wherein the developer material includes magnetic particles.
Claim 21
Dependent Claim
38 words
A printing machine according to claim 17, wherein said transporting means includes: an elongated tubular member having said guiding means secured thereto; and means for generating a magnetic field to attract said magnetic particles to said tubular member.
Claim 22
Dependent Claim
18 words
A printing machine according to claim 18, wherein said plurality of fibers are preferably electrically conductive and magnetic.
Claim 23
Dependent Claim
22 words
A printing machine according to claim 19, wherein said generating means includes an elongated magnetic member disposed interiorly of said tubular member.
Claim 24
Dependent Claim
114 words
An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a photoconductive member is developed with a developer material comprising at least magnetic particles, wherein the improvement includes: an elongated tubular member; an elongated magnetic member disposed interiorly of said tubular member for attracting developer material; a plurality of electrically conductive and magnetic fibers extending outwardly from said tubular member with the end regions of at least a portion of said fibers being closely adjacent to the photoconductive member; and a ramp-shaped member secured to said tubular member in the region of said plurality of fibers to guide the developer material to the free end regions of said fibers.
Claim 25
Dependent Claim
114 words
An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a photoconductive member is developed with a developer material comprising at least magnetic particles, wherein the improvement includes: an elongated tubular member; an elongated magnetic member disposed interiorly of said tubular member for attracting developer material; a plurality of electrically conductive and magnetic fibers extending outwardly from said tubular member with the end regions of at least a portion of said fibers being closely adjacent to the photoconductive member; and a ramp-shaped member secured to said tubular member in the region of said plurality of fibers to guide the developer material to the free end regions of said fibers.
Claim 26
Dependent Claim
13 words
A printing machine according to claim 21, wherein said tubular member is stationary.
Claim 27
Dependent Claim
14 words
A printing machine according to claim 22, including means for rotating said magnetic member.
Claim 28
Dependent Claim
33 words
A printing machine according to claim 23, wherein said plurality of fibers are grouped together to form a multiplicity of spaced tufts with each of said tufts having a multiplicity of said fibers.
Claim 29
Dependent Claim
16 words
A printing machine according to claim 24, wherein the spacing between adjacent tufts is substantially equal.
Claim 30
Dependent Claim
22 words
A printing machine according to claim 25, further including a fabric secured to said tubular member and having said tufts woven therethrough.
Claim 31
Dependent Claim
14 words
A printing machine according to claim 26, wherein said fabric includes a conductive coating.
Claim 32
Dependent Claim
19 words
A printing machine according to claim 27, wherein said tufts are woven through said fabric in a W-shaped configuration.
Claim 33
Dependent Claim
19 words
A printing machine according to claim 27, wherein said tufts are woven through said fabric in a U-shaped configuration.
Claim 34
Dependent Claim
18 words
A printing machine according to claim 28 or 29, wherein said fibers are made preferably from stainless steel.
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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) | 1985-04-12 | 1985-10-12 | 1986-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-12 | 1989-10-12 | 1990-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-12 | 1993-10-12 | 1994-04-13 | $7700.00 | Window Closed / Lapsed |