Patent US4067018A successfully refreshed from Google Patents.
US4067018A
Expired / Lapsed
US
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Excessive magnetic developer displacement system
Assignee: Xerox Corp
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Filing: 1975-08-27
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Granted: 1978-01-03
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Expires: 1995-08-27
Abstract
Abstract Developed members having a magnetic latent image and comprising magnetic developer material in imagewise configuration corresponding to the latent image and additional magnetic developer material in background areas is rendered substantially free of excessive magnetic developing material by subjecting the member to an acceleration of magnitude sufficient to displace excessive developer material from said member in background and images areas but insufficient to adversely effect the optical density of the imagewise configured deposition of developer material. Preferably, the excessive developer material displaced from said member is removed from the vicinity of said member by application of air streams along the developed surface of said member.
Inventors
- 👤 Stephen F. Pond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:52
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/095; G03G19/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
80 words
Apparatus for displacing magnetic toner from a member bearing a latent magnetic image and having deposited thereon magnetic toner in both imagewise configuration and background areas, comprising: a. means for moving the member; and b. acceleration means at a toner removal station in the movement path for applying an acceleration to said mwmber only at said station of a magnitude sufficient to displace magnetic toner from background areas but insufficient to displace all of the magnetic toner in imagewise configuration.
Claim 2
Dependent Claim
80 words
Apparatus for displacing magnetic toner from a member bearing a latent magnetic image and having deposited thereon magnetic toner in both imagewise configuration and background areas, comprising: a. means for moving the member; and b. acceleration means at a toner removal station in the movement path for applying an acceleration to said mwmber only at said station of a magnitude sufficient to displace magnetic toner from background areas but insufficient to displace all of the magnetic toner in imagewise configuration.
Claim 3
Dependent Claim
22 words
The apparatus according to claim 1 wherein the acceleration means comprises guide means for changing the direction of movement of said member.
Claim 4
Dependent Claim
19 words
The apparatus according to claim 2 wherein said guide means has an arcuate portion over which said member moves.
Claim 5
Dependent Claim
105 words
A magnetic imaging system comprising: a. means for latently magnetically imaging a web member; b. means for moving the member through a path of travel at a predetermined velocity magnitude; and c. guide means at a toner removal station having an arcuate portion in the path of travel of a radius sufficient to subject said member only at said station at the velocity magnitude to a centrifugal acceleration normal to said member and of magnitude sufficient to displace magnetic toner from background portions of the latently imaged member but insufficient to detach all of the magnetic toner from image portions of the latently imaged member.
Claim 6
Dependent Claim
105 words
A magnetic imaging system comprising: a. means for latently magnetically imaging a web member; b. means for moving the member through a path of travel at a predetermined velocity magnitude; and c. guide means at a toner removal station having an arcuate portion in the path of travel of a radius sufficient to subject said member only at said station at the velocity magnitude to a centrifugal acceleration normal to said member and of magnitude sufficient to displace magnetic toner from background portions of the latently imaged member but insufficient to detach all of the magnetic toner from image portions of the latently imaged member.
Claim 7
Dependent Claim
25 words
The system according to claim 4 further including means along the path of travel for transferring magnetic toner from said member to a copy medium.
Claim 8
Dependent Claim
21 words
The system according to claim 5 further including means along the path of travel for depositing magnetic toner on said member.
Claim 9
Dependent Claim
26 words
The system according to claim 6 wherein said guide means is located intermediate the means for depositing magnetic toner and the means for transferring magnetic toner.
Claim 10
Dependent Claim
21 words
The system according to claim 4 wherein said means for latently magnetically imaging the member includes means for heating the member.
Claim 11
Dependent Claim
30 words
The system according to claim 8 wherein said means for latently magnetically imaging the member includes means for intimately contacting the member with another member bearing a latent magnetic image.
Claim 12
Dependent Claim
19 words
The system according to claim 4 wherein said arcuate portion radius is from about 0.1 to about 10 millimeters.
Claim 13
Dependent Claim
20 words
The system according to claim 4 wherein the predetermined velocity is from about 50 to about 250 centimeters per second.
Claim 14
Dependent Claim
19 words
The system according to claim 4 wherein the centrifugal acceleration is from about 10 to about about 3000 gravities.
Claim 15
Dependent Claim
81 words
A magnetic imaging process, comprising: a. providing a latently magnetically imaged web member bearing magnetic toner in imagewise configuration corresponding to image portions of the latent image and magnetic toner in background portions of the latent image, and b. subjecting the member to acceleration of predetermined magnitude only along a portion of its path of travel sufficient to displace the magnetic toner from background portions of the latent image but insufficient to displace all of the magnetic toner in imagewise configuration.
Claim 16
Dependent Claim
81 words
A magnetic imaging process, comprising: a. providing a latently magnetically imaged web member bearing magnetic toner in imagewise configuration corresponding to image portions of the latent image and magnetic toner in background portions of the latent image, and b. subjecting the member to acceleration of predetermined magnitude only along a portion of its path of travel sufficient to displace the magnetic toner from background portions of the latent image but insufficient to displace all of the magnetic toner in imagewise configuration.
Claim 17
Dependent Claim
21 words
The process of claim 13 wherein the travel path portion has a radius of from about 0.1 to about 10 millimeters.
Claim 18
Dependent Claim
17 words
The process of claim 13 wherein the centrifugal acceleration is from about 10 to about 3000 gravities.
Claim 19
Dependent Claim
17 words
The process of claim 13 wherein the predetermined velocity is up to about 250 centimeters per second.
Claim 20
Dependent Claim
72 words
In a magnetic imaging process wherein a latently magnetically imaged web member is developed so that said member bears magnetic developer material in both imagewise configuration and in background areas, the improvement comprising subjecting the member to an acceleration only along a portion of its path of travel of a magnitude sufficient to displace magnetic developer material in background areas but insufficient to displace all of the developer material in imagewise configuration.
Claim 21
Dependent Claim
72 words
In a magnetic imaging process wherein a latently magnetically imaged web member is developed so that said member bears magnetic developer material in both imagewise configuration and in background areas, the improvement comprising subjecting the member to an acceleration only along a portion of its path of travel of a magnitude sufficient to displace magnetic developer material in background areas but insufficient to displace all of the developer material in imagewise configuration.
Claim 22
Dependent Claim
74 words
In a magnetic imaging system wherein a latently magnetically imaged web member is developed so that said member bears magnetic developer material in both imagewise configuration and in background areas, the improvement comprising acceleration means at a toner removal station for applying an acceleration only at said station to the member of a magnitude sufficient to displace magnetic developer from background areas but insufficient to displace all of the magnetic toner in imagewise configuration.
Claim 23
Dependent Claim
74 words
In a magnetic imaging system wherein a latently magnetically imaged web member is developed so that said member bears magnetic developer material in both imagewise configuration and in background areas, the improvement comprising acceleration means at a toner removal station for applying an acceleration only at said station to the member of a magnitude sufficient to displace magnetic developer from background areas but insufficient to displace all of the magnetic toner in imagewise configuration.
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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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |