Patent US4975741A successfully refreshed from Google Patents.
US4975741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control unit for a copying machine including automatic shutdown
Assignee: Fujifilm Business Innovation Corp
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Filing: 1987-09-04
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Granted: 1990-12-04
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Expires: 2007-09-04
Abstract
Abstract A control unit of a copying machine, including an optical scanning mechanism for scanning a manuscript surface having a picture image; a photosensitive substance rotating synchronously with scanning of the optical scanning mechanism, on which an electrostatic latent image corresponding to the picture image is formed; developing apparatus for developing the electrostatic latent image; first reference signal generator for generating a first reference signal representing a rotational reference position of the photosensitive substance rotated synchronously with the rotation of the photosensitive substance; first controller for controlling a rotational position of the photosensitive substance according to the reference signal generated from the reference signal generator; transfer apparatus for transferring an image developed through the developing apparatus to a recording paper; second reference signal generator for generating a second reference signal representing a reference for forming an initiation position of the electrostatic latent image; third reference signal generator for generating a third reference signal representing a reference for a transfer initiation position sychronously with the transfer operation of the transfer apparatus; and timing signal generator for generating timing signals representing a grip timing for the recording paper synchronously with the transfer operation of the transfer apparatus.
Inventors
- 👤 Masaaki Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:05
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/01; G03G15/0142; G03G15/0147; G03G15/0152; G03G15/0163; G03G21/00; G03G21/14; G03G21/145
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
221 words
A control unit for controlling a copying machine, comprising: an optical scanning mechanism for scanning a manuscript surface having a picture image; a photosensitive substance rotating synchronously with the scanning operation of said optical scanning mechanism, on which an electrostatic latent image corresponding to said picture image is formed; developing means for developing said electrostatic latent image; transfer means for transferring an image developed through said developing means to a recording paper, said transfer means including a gripper for gripping said recording paper and a sensor for detecting an operational state of said gripper and outputting a detecting signal, wherein said transfer means substantially limits a time of the reception of a first, a second, and a third signal according to the detection signal from said sensor; first means for generating said first signal indicating a position of said optical scanning mechanism within a moving range thereof; second means for generating said second signal indicating an amount of movement of said photosensitive substance; third means for generating said third signal indicating an amount of movement of said transfer means; and control means connected to said optical scanning mechanism, said photosensitive substance, and said transfer means for controlling, according to one of said first, second, and third signals, the position of said optical scanning mechanism, said photosensitive substance, and said transfer means.
Claim 2
Dependent Claim
221 words
A control unit for controlling a copying machine, comprising: an optical scanning mechanism for scanning a manuscript surface having a picture image; a photosensitive substance rotating synchronously with the scanning operation of said optical scanning mechanism, on which an electrostatic latent image corresponding to said picture image is formed; developing means for developing said electrostatic latent image; transfer means for transferring an image developed through said developing means to a recording paper, said transfer means including a gripper for gripping said recording paper and a sensor for detecting an operational state of said gripper and outputting a detecting signal, wherein said transfer means substantially limits a time of the reception of a first, a second, and a third signal according to the detection signal from said sensor; first means for generating said first signal indicating a position of said optical scanning mechanism within a moving range thereof; second means for generating said second signal indicating an amount of movement of said photosensitive substance; third means for generating said third signal indicating an amount of movement of said transfer means; and control means connected to said optical scanning mechanism, said photosensitive substance, and said transfer means for controlling, according to one of said first, second, and third signals, the position of said optical scanning mechanism, said photosensitive substance, and said transfer means.
Claim 3
Dependent Claim
307 words
A control unit for controlling a copying machine, comprising: an optical scanning mechanism for scanning a manuscript surface having a picture image; a photosensitive substance rotating synchronously with the scanning operation of said optical scanning mechanism, on which an electrostatic latent image corresponding to said picture image is formed; developing means for developing said electrostatic latent image; transfer means for transferring an image developed through said developing means to a recording paper, said transfer means including a gripper for gripping said recording paper and a sensor for detecting an operational state of said gripper and outputting a detecting signal, wherein said transfer means substantially limits a time of the reception of a first, a second, and a third signal according to the detection signal from said sensor; first means for generating said first signal indicating a position of said optical scanning mechanism within a moving range thereof; second means for generating said second signal indicating an amount of movement of said photosensitive substance; third means for generating said third signal indicating an amount of movement of said transfer means; first control means connected to said optical scanning mechanism, said photosensitive substance, and said transfer means for controlling, according to one of said first, second, and third signals, the position of said optical scanning mechanism, said photosensitive substance, and said transfer means; pulse generating means for generating a pulse signal corresponding to a grip timing of said recording paper synchronously with the rotation of said transfer means; measuring means for measuring the synchronous relationship between said third signal and said pulse signal and the time interval of said third signal; and second control means for discriminating whether the measured synchronous relationship and time interval fall within a predetermined range, and for stopping the copying operation when the measured relationship and time interval are out of the predetermined range.
Claim 4
Dependent Claim
307 words
A control unit for controlling a copying machine, comprising: an optical scanning mechanism for scanning a manuscript surface having a picture image; a photosensitive substance rotating synchronously with the scanning operation of said optical scanning mechanism, on which an electrostatic latent image corresponding to said picture image is formed; developing means for developing said electrostatic latent image; transfer means for transferring an image developed through said developing means to a recording paper, said transfer means including a gripper for gripping said recording paper and a sensor for detecting an operational state of said gripper and outputting a detecting signal, wherein said transfer means substantially limits a time of the reception of a first, a second, and a third signal according to the detection signal from said sensor; first means for generating said first signal indicating a position of said optical scanning mechanism within a moving range thereof; second means for generating said second signal indicating an amount of movement of said photosensitive substance; third means for generating said third signal indicating an amount of movement of said transfer means; first control means connected to said optical scanning mechanism, said photosensitive substance, and said transfer means for controlling, according to one of said first, second, and third signals, the position of said optical scanning mechanism, said photosensitive substance, and said transfer means; pulse generating means for generating a pulse signal corresponding to a grip timing of said recording paper synchronously with the rotation of said transfer means; measuring means for measuring the synchronous relationship between said third signal and said pulse signal and the time interval of said third signal; and second control means for discriminating whether the measured synchronous relationship and time interval fall within a predetermined range, and for stopping the copying operation when the measured relationship and time interval are out of the predetermined range.
Claim 5
Dependent Claim
253 words
A control unit for controlling a copying machine, comprising: an optical scanning mechanism for scanning a manuscript surface having a picture image; a photosensitive substance rotating synchronously with the scanning operation of said optical scanning mechanism, on which an electrostatic latent image corresponding to said picture image is formed; developing means for developing said electrostatic latent image; transfer means for transferring an image developed through said developing means to a recording paper, said transfer means including a gripper for gripping said recording paper and a sensor for detecting an operational state of said gripper and outputting a detecting signal, wherein said transfer means substantially limits a time of the reception of a fruit, a second, and a third signal according to the detecting signal from said sensor; first means for generating said first signal indicating a position of said optical scanning mechanism within a moving range thereof; second means for generating said second signal indicating an amount of movement of said photosensitive substance; third means for generating said third signal indicating an amount of movement of said transfer means; first control means connected to said optical scanning mechanism, said photosensitive substance, and said transfer means for controlling, according to one of said first, second, and third signals, the position of said optical scanning mechanism, said photosensitive substance, and said transfer means; and second control means for controlling a positional relationship between said photosensitive substance and said transfer means with a predetermined relationship by employing said second and third signals and said detecting signal.
Claim 6
Dependent Claim
253 words
A control unit for controlling a copying machine, comprising: an optical scanning mechanism for scanning a manuscript surface having a picture image; a photosensitive substance rotating synchronously with the scanning operation of said optical scanning mechanism, on which an electrostatic latent image corresponding to said picture image is formed; developing means for developing said electrostatic latent image; transfer means for transferring an image developed through said developing means to a recording paper, said transfer means including a gripper for gripping said recording paper and a sensor for detecting an operational state of said gripper and outputting a detecting signal, wherein said transfer means substantially limits a time of the reception of a fruit, a second, and a third signal according to the detecting signal from said sensor; first means for generating said first signal indicating a position of said optical scanning mechanism within a moving range thereof; second means for generating said second signal indicating an amount of movement of said photosensitive substance; third means for generating said third signal indicating an amount of movement of said transfer means; first control means connected to said optical scanning mechanism, said photosensitive substance, and said transfer means for controlling, according to one of said first, second, and third signals, the position of said optical scanning mechanism, said photosensitive substance, and said transfer means; and second control means for controlling a positional relationship between said photosensitive substance and said transfer means with a predetermined relationship by employing said second and third signals and said detecting signal.
Claim 7
Dependent Claim
270 words
A control unit for controlling a copying machine, comprising: an optical scanning mechanism for scanning a manuscript surface having a picture image; a photosensitive substance rotating synchronously with the scanning operation of said optical scanning mechanism, on which an electrostatic latent image corresponding to said picture image is formed; developing means for developing said electrostatic latent image; transfer means for transferring an image developed through said developing means to a recording paper, said transfer means including a gripper for gripping said recording paper and a sensor for detecting an operational state of said gripper and outputting a detecting signal, wherein said transfer means substantially limits a time of the reception of a first, a second, and a third signal according to the detection signal from said sensor; first means for generating said first signal indicating a position of said optical scanning mechanism within a moving range thereof; second means for generating said second signal indicating an amount of movement of said photosensitive substance; third means for generating said third signal indicating an amount of movement of said transfer means; first control means connected to said optical scanning mechanism, said photosensitive substance, and said transfer means for controlling, according to one of said first, second, and third signals, the position of said optical scanning mechanism, said photosensitive substance, and said transfer means; and second control means for controlling a positional relationship between said photosensitive substance and said transfer means with a predetermined relationship by employing said second and third signals and said detecting signal after the termination of a reciprocating motion consisting of a double stroke of the optical scanning mechanism.
Claim 8
Dependent Claim
270 words
A control unit for controlling a copying machine, comprising: an optical scanning mechanism for scanning a manuscript surface having a picture image; a photosensitive substance rotating synchronously with the scanning operation of said optical scanning mechanism, on which an electrostatic latent image corresponding to said picture image is formed; developing means for developing said electrostatic latent image; transfer means for transferring an image developed through said developing means to a recording paper, said transfer means including a gripper for gripping said recording paper and a sensor for detecting an operational state of said gripper and outputting a detecting signal, wherein said transfer means substantially limits a time of the reception of a first, a second, and a third signal according to the detection signal from said sensor; first means for generating said first signal indicating a position of said optical scanning mechanism within a moving range thereof; second means for generating said second signal indicating an amount of movement of said photosensitive substance; third means for generating said third signal indicating an amount of movement of said transfer means; first control means connected to said optical scanning mechanism, said photosensitive substance, and said transfer means for controlling, according to one of said first, second, and third signals, the position of said optical scanning mechanism, said photosensitive substance, and said transfer means; and second control means for controlling a positional relationship between said photosensitive substance and said transfer means with a predetermined relationship by employing said second and third signals and said detecting signal after the termination of a reciprocating motion consisting of a double stroke of the optical scanning mechanism.
Claim 9
Dependent Claim
259 words
A control unit for controlling a copying machine, comprising: an optical scanning mechanism for scanning a manuscript surface having a picture image; a photosensitive substance rotating synchronously with the scanning operation of said optical scanning mechanism, on which an electrostatic latent image corresponding to said picture image is formed; developing means for developing said electrostatic latent image; transfer means for transferring an image developed through said developing means to a recording paper, said transfer means including a gripper for gripping said recording paper and a sensor for detecting an operational state of said gripper and outputting a detecting signal, wherein said transfer means substantially limits a time of the reception of a first, a second, and a third signal according to the detection signal from said sensor; first means for generating said first signal indicating a position of said optical scanning mechanism within a moving range thereof; second means for generating said second signal indicating an amount of movement of said photosensitive substance; third means for generating said third signal indicating an amount of movement of said transfer means; first control means connected to said optical scanning mechanism, said photosensitive substance, and said transfer means for controlling, according to one of said first, second, and third signals, the position of said optical scanning mechanism, said photosensitive substance, and said transfer means; and second control means for controlling a positional relationship between said photosensitive substance and said transfer means with a predetermined relationship by employing said second and third signals and said detecting signal before initiation of a copying cycle.
Claim 10
Dependent Claim
259 words
A control unit for controlling a copying machine, comprising: an optical scanning mechanism for scanning a manuscript surface having a picture image; a photosensitive substance rotating synchronously with the scanning operation of said optical scanning mechanism, on which an electrostatic latent image corresponding to said picture image is formed; developing means for developing said electrostatic latent image; transfer means for transferring an image developed through said developing means to a recording paper, said transfer means including a gripper for gripping said recording paper and a sensor for detecting an operational state of said gripper and outputting a detecting signal, wherein said transfer means substantially limits a time of the reception of a first, a second, and a third signal according to the detection signal from said sensor; first means for generating said first signal indicating a position of said optical scanning mechanism within a moving range thereof; second means for generating said second signal indicating an amount of movement of said photosensitive substance; third means for generating said third signal indicating an amount of movement of said transfer means; first control means connected to said optical scanning mechanism, said photosensitive substance, and said transfer means for controlling, according to one of said first, second, and third signals, the position of said optical scanning mechanism, said photosensitive substance, and said transfer means; and second control means for controlling a positional relationship between said photosensitive substance and said transfer means with a predetermined relationship by employing said second and third signals and said detecting signal before initiation of a copying cycle.
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) | 1993-12-03 | 1994-06-04 | 1994-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-03 | 1998-06-04 | 1998-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-03 | 2002-06-04 | 2002-12-04 | $7700.00 | Window Closed / Lapsed |