US4796064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cycle-up control scheme
Assignee: Xerox Corp
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Filing: 1988-01-11
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Granted: 1989-01-03
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Expires: 2008-01-11
Abstract
Abstract A control device for adjusting the surface potential of an image bearing member of a machine during the initial cycles of a job run wherein the image bearing member manifests varying characteristics after completion of a job run. The control device includes a charging member to produce a surface potential on the image bearing member, a sensor to measure the surface potential on the image bearing member and logic circuitry responsive to the charging member and the sensor after a first cycle of the machine operation to control the charging member current during a second cycle of the machine operation in which the logic circuitry includes means to predict changed characteristics of the image bearing member after the completion of the first job run at the initiation of a second job run and the means to determine relationship between the charging current of the charging member and the measured surface potential of the image bearing member.
Inventors
- 👤 Arthur L. Torrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:03
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/5033; G03G15/5037; G03G15/02; G03G15/0266
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
169 words
A control device for adjusting the surface potential of an image bearing member of a machine during the initial cycles of a job run, the image bearing member manifesting varying characteristics after completion of a job run, comprising: output means for use in forming a latent image on the image bearing member wherein the output means produces a signal to control the surface potential of the image bearing member, measuring means to measure the surface potential on said image bearing member, and means responsive to the output means and the measuring means after a first cycle of the machine operation to change the signal of the output means during a second cycle of the machine, the responsive means including means to predict the changed characteristics of the image bearing member after the completion of a first job run at the initiation of a second job run and means to determine a relationship between the signal produced by the output means and the surface potential of the image bearing member.
Claim 2
Dependent Claim
169 words
A control device for adjusting the surface potential of an image bearing member of a machine during the initial cycles of a job run, the image bearing member manifesting varying characteristics after completion of a job run, comprising: output means for use in forming a latent image on the image bearing member wherein the output means produces a signal to control the surface potential of the image bearing member, measuring means to measure the surface potential on said image bearing member, and means responsive to the output means and the measuring means after a first cycle of the machine operation to change the signal of the output means during a second cycle of the machine, the responsive means including means to predict the changed characteristics of the image bearing member after the completion of a first job run at the initiation of a second job run and means to determine a relationship between the signal produced by the output means and the surface potential of the image bearing member.
Claim 3
Dependent Claim
32 words
The control of claim 1 wherein the output means is a charging corotron providing a charging potential and said relationship is the ratio of the measured surface potential to said charging potential.
Claim 4
Dependent Claim
26 words
The control means of claim 1 wherein the means to predict is a function of the signal from the output means for a previous job run.
Claim 5
Dependent Claim
13 words
The control of claim 1 wherein the measuring means is an electrostatic voltmeter.
Claim 6
Dependent Claim
120 words
A control device for adjusting the surface potential of an image bearing member during cycle up comprising: output means for use in forming a latent image on the image bearing member wherein the output means produces a signal to control the surface potential of the image bearing member, measuring means to measure the surface potential on said image bearing member, and means responsive to the output means and the measuring means after a first cycle of the machine to change the signal of the output means during a second cycle of the machine, the responsive means including a predictive component and a corrective component for enabling the printing of acceptable copy on unstable first cycles of the image bearing member.
Claim 7
Dependent Claim
120 words
A control device for adjusting the surface potential of an image bearing member during cycle up comprising: output means for use in forming a latent image on the image bearing member wherein the output means produces a signal to control the surface potential of the image bearing member, measuring means to measure the surface potential on said image bearing member, and means responsive to the output means and the measuring means after a first cycle of the machine to change the signal of the output means during a second cycle of the machine, the responsive means including a predictive component and a corrective component for enabling the printing of acceptable copy on unstable first cycles of the image bearing member.
Claim 8
Dependent Claim
21 words
The control of claim 5 wherein the predictive component is a function of the recovery characteristics of the image bearing member.
Claim 9
Dependent Claim
19 words
The control of claim 5 wherein the corrective component is a function of the output of said measuring means.
Claim 10
Dependent Claim
22 words
The control device of claim 5 wherein the output means is a charging corotron and the measuring means is an electrostatic voltmeter.
Claim 11
Dependent Claim
55 words
The control of claim 5 wherein the predictive component is a function of the charge retaining properties of the image bearing member and the signal from the output means, and the corrective component is a function of a relationship between the surface potential of the image bearing member and a signal of the output means.
Claim 12
Dependent Claim
147 words
An image bearing apparatus provided with a control device for adjusting the surface potential of an image bearing member of the image bearing apparatus including: output means for use in forming a latent image on the image bearing member wherein the output means produces a variable output to control the surface potential of the image bearing member, measuring means to measure the surface potential on said image bearing member, means to compare the magnitude of an output of the measuring device with respect to a reference value, means for changing the reference value in response to a compared output, said compare means having an output coupled to the output means providing an adaptive component to the output means wherein the improvement comprises prediction means providing a predictive component for controlling the variable output of of the output means during the initial cycles of the image bearing apparatus.
Claim 13
Dependent Claim
147 words
An image bearing apparatus provided with a control device for adjusting the surface potential of an image bearing member of the image bearing apparatus including: output means for use in forming a latent image on the image bearing member wherein the output means produces a variable output to control the surface potential of the image bearing member, measuring means to measure the surface potential on said image bearing member, means to compare the magnitude of an output of the measuring device with respect to a reference value, means for changing the reference value in response to a compared output, said compare means having an output coupled to the output means providing an adaptive component to the output means wherein the improvement comprises prediction means providing a predictive component for controlling the variable output of of the output means during the initial cycles of the image bearing apparatus.
Claim 14
Dependent Claim
146 words
A control device for adjusting the surface potential of an image bearing member of a machine during the initial cycles of a job run, the image bearing member manifesting varying characteristics after completion of a job run, comprising: output means for use in forming a latent image on the image bearing member wherein the output means produces a signal to control the surface potential of the image bearing member, measuring means to measure the surface potential on said image bearing member, and means responsive to the output means and the measuring means after a first cycle of the machine operation to change the signal of the output means during a second cycle of the machine, the responsive means including means to predict the changed characteristics of the image bearing member after the completion of a first job run at the initiation of a second job run.
Claim 15
Dependent Claim
146 words
A control device for adjusting the surface potential of an image bearing member of a machine during the initial cycles of a job run, the image bearing member manifesting varying characteristics after completion of a job run, comprising: output means for use in forming a latent image on the image bearing member wherein the output means produces a signal to control the surface potential of the image bearing member, measuring means to measure the surface potential on said image bearing member, and means responsive to the output means and the measuring means after a first cycle of the machine operation to change the signal of the output means during a second cycle of the machine, the responsive means including means to predict the changed characteristics of the image bearing member after the completion of a first job run at the initiation of a second job run.
Claim 16
Dependent Claim
34 words
The control of claim 11 wherein the output means is a charging corotron providing a charging potential and including the means to determine the ratio of the measured surface potential to said charging potential.
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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) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |