Patent US4050413A successfully refreshed from Google Patents.
US4050413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic brush crossmixing system
Assignee: Xerox Corp
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Filing: 1975-09-22
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Granted: 1977-09-27
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Expires: 1995-09-22
Abstract
Abstract A magnetic brush development system within a photocopier that circulates developer by the use of magnetic rollers includes deflecting members interposed between the rollers that are oscillated laterally to maintain homogeneity of developer circulating over the rollers.
Inventors
- 👤 Delmer G. Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:06
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
100 words
In a system for developing latent images carried by an imaging surface including multiple donor members adjacent said imaging surface which carry developer particles through a development zone to said imaging surface to develop the latent image, the improvement comprising: a homogenizing means interposed between at least two adjacent donor members for homogenizing developer particles being carried between said donor members, and an oscillating means connected to said homogenizing means which mixes the developer as it flows through the development zone whereby the developer is maintained in a homogeneous state throughout the development zone to produce images of uniform quality.
Claim 2
Dependent Claim
100 words
In a system for developing latent images carried by an imaging surface including multiple donor members adjacent said imaging surface which carry developer particles through a development zone to said imaging surface to develop the latent image, the improvement comprising: a homogenizing means interposed between at least two adjacent donor members for homogenizing developer particles being carried between said donor members, and an oscillating means connected to said homogenizing means which mixes the developer as it flows through the development zone whereby the developer is maintained in a homogeneous state throughout the development zone to produce images of uniform quality.
Claim 3
Dependent Claim
11 words
The improvement of claim 1 wherein said homogenizing means is comb-shaped.
Claim 4
Dependent Claim
14 words
The improvement in claim 1 wherein said homogenizing means is made of conductive material.
Claim 5
Dependent Claim
13 words
The improvement in claim 3 wherein said homogenizing means is connected to ground.
Claim 6
Dependent Claim
17 words
The improvement in claim 3 wherein said homogenizing means is connected through a bias supply to ground.
Claim 7
Dependent Claim
11 words
The improvement in claim 1 wherein said homogenizing means is plow-shaped.
Claim 8
Dependent Claim
12 words
The improvement in claim 1 wherein said homogenizing means is flat-vane shaped.
Claim 9
Dependent Claim
11 words
The improvement in claim 1 wherein said homogenizing means is wedge-shaped.
Claim 10
Dependent Claim
61 words
A development system for developing a recording member in a development zone comprising: at least one developer roller in the development zone for applying developer material to the recording member, a sump for developer material, transport means for gathering developer from said sump and passing it to said developer roller, and a homogenizing member between the transport means and developer roller.
Claim 11
Dependent Claim
61 words
A development system for developing a recording member in a development zone comprising: at least one developer roller in the development zone for applying developer material to the recording member, a sump for developer material, transport means for gathering developer from said sump and passing it to said developer roller, and a homogenizing member between the transport means and developer roller.
Claim 12
Dependent Claim
27 words
The developer system in claim 9 including a means to oscillate said member to homogenize developer material as it passes between the transport means and developer roller.
Claim 13
Dependent Claim
100 words
In a system for developing latent images carried by an imaging surface including a donor member and a transport member adjacent said imaging surface which carry one-component developer particles through a development zone to said imaging surface to develop the latent image, the improvement comprising: a homogenizing means interposed between said donor member and transport member adapted to homogenize the one-component developer particles being carried between said donor member and transport member, and an oscillating means connected to said homogenizing means whereby the developer is maintained in a homogeneous state throughout the development zone to produce images of uniform quality.
Claim 14
Dependent Claim
100 words
In a system for developing latent images carried by an imaging surface including a donor member and a transport member adjacent said imaging surface which carry one-component developer particles through a development zone to said imaging surface to develop the latent image, the improvement comprising: a homogenizing means interposed between said donor member and transport member adapted to homogenize the one-component developer particles being carried between said donor member and transport member, and an oscillating means connected to said homogenizing means whereby the developer is maintained in a homogeneous state throughout the development zone to produce images of uniform quality.
Claim 15
Dependent Claim
11 words
The improvement of claim 11 wherein said homogenizing means is comb-shaped.
Claim 16
Dependent Claim
94 words
In a system for developing latent images carried by an imaging surface including multiple donor members adjacent said imaging surface which carry two-component developer particles through a development zone to said imaging surface to develop the latent image, the improvement comprising: a homogenizing means interposed between at least two adjacent donor members adapted to homogenize the two-component developer particles being carried between said donor members, and an oscillating means connected to said homogenizing means whereby said two-component developer is maintained in a homogeneous state throughout the development zone to produce images of uniform quality.
Claim 17
Dependent Claim
94 words
In a system for developing latent images carried by an imaging surface including multiple donor members adjacent said imaging surface which carry two-component developer particles through a development zone to said imaging surface to develop the latent image, the improvement comprising: a homogenizing means interposed between at least two adjacent donor members adapted to homogenize the two-component developer particles being carried between said donor members, and an oscillating means connected to said homogenizing means whereby said two-component developer is maintained in a homogeneous state throughout the development zone to produce images of uniform quality.
Claim 18
Dependent Claim
94 words
In a system for developing latent images carried by an imaging surface including multiple donor members adjacent said imaging surface which carry one-component developer particles through a development zone to said imaging surface to develop the latent image, the improvement comprising: a homogenizing means interposed between at least two adjacent donor members adapted to homogenize the one-component developer particles being carried between said donor members, and an oscillating means connected to said homogenizing means whereby the one-component developer is maintained in a homogeneous state throughout the development zone to produce images of uniform quality.
Claim 19
Dependent Claim
94 words
In a system for developing latent images carried by an imaging surface including multiple donor members adjacent said imaging surface which carry one-component developer particles through a development zone to said imaging surface to develop the latent image, the improvement comprising: a homogenizing means interposed between at least two adjacent donor members adapted to homogenize the one-component developer particles being carried between said donor members, and an oscillating means connected to said homogenizing means whereby the one-component developer is maintained in a homogeneous state throughout the development zone to produce images of uniform quality.
Claim 20
Dependent Claim
14 words
The improvement of claim 14 wherein said homogenizing means is made of conductive material.
Claim 21
Dependent Claim
13 words
The improvement in claim 15 wherein said homogenizing means is connected to ground.
Claim 22
Dependent Claim
17 words
The improvement of claim 15 wherein said homogenizing means is connected through a bias supply to ground.
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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |