US4569585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus
Assignee: Canon Inc
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Filing: 1983-06-10
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Granted: 1986-02-11
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Expires: 2003-06-10
Abstract
Abstract An image forming apparatus has a control unit which controls an image forming unit in accordance with a detection signal from an abnormal power condition detector which detects an abnormal condition of a power suply such as a voltage drop or a momentary break. The control unit stops the image forming unit a predetermined time period after the detection of the abnormal condition of the power.
Inventors
- 👤 Shunichi Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:02
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/55
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
An image forming apparatus comprising: means for supplying power; image forming means coupled to said power supply means for carrying out a predetermined image forming operation; control means coupled to said image forming means for controlling said image forming operation; and means for detecting an abnormal power condition of said power supply means, wherein said detecting means is coupled to said control means, and wherein said control means stops said image forming means upon detection of the abnormal power condition by said detecting means, and said control means causes said image forming means to perform a paper ejection operation upon recovery from the abnormal power condition.
Claim 2
Dependent Claim
106 words
An image forming apparatus comprising: means for supplying power; image forming means coupled to said power supply means for carrying out a predetermined image forming operation; control means coupled to said image forming means for controlling said image forming operation; and means for detecting an abnormal power condition of said power supply means, wherein said detecting means is coupled to said control means, and wherein said control means stops said image forming means upon detection of the abnormal power condition by said detecting means, and said control means causes said image forming means to perform a paper ejection operation upon recovery from the abnormal power condition.
Claim 3
Dependent Claim
26 words
An image forming apparatus according to claim 1, wherein said control means continues to stop said image forming means after the paper ejection operation is performed.
Claim 4
Dependent Claim
39 words
An image forming apparatus according to claim 1, wherein said control means, after the paper ejection operation is performed, causes said image forming means to execute the image formation in process at the time the abnormal condition is detected.
Claim 5
Dependent Claim
23 words
An image forming apparatus according to claim 1, wherein said control means enables a fixing heater after the paper ejection operation is performed.
Claim 6
Dependent Claim
19 words
An image forming apparatus according to claim 1, wherein said power supply means comprises an AC power supply means.
Claim 7
Dependent Claim
91 words
An image forming apparatus comprising: means for supplying power; means coupled to said power supply means for carrying out a predetermined image forming operation including a paper ejection operation; means coupled to said image forming means for controlling said image forming operation; and means for detecting an abnormal power condition of said power supply means wherein said detecting means is coupled to said control means, and wherein when the abnormal power condition is detected by said detecting means, said image forming means is stopped after the paper ejection operation is performed.
Claim 8
Dependent Claim
91 words
An image forming apparatus comprising: means for supplying power; means coupled to said power supply means for carrying out a predetermined image forming operation including a paper ejection operation; means coupled to said image forming means for controlling said image forming operation; and means for detecting an abnormal power condition of said power supply means wherein said detecting means is coupled to said control means, and wherein when the abnormal power condition is detected by said detecting means, said image forming means is stopped after the paper ejection operation is performed.
Claim 9
Dependent Claim
20 words
An image forming apparatus according to claim 6, wherein said paper ejection is performed by a second power supply means.
Claim 10
Dependent Claim
33 words
An image forming apparatus according to claim 6, wherein immediately after recovery from the abnormal condition, said control means causes said image forming operation, in process before the abnormal condition occurs, to resume.
Claim 11
Dependent Claim
18 words
An image forming apparatus according to claim 6, wherein said power supply means comprises an AC power supply.
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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) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |