Patent US1712003A successfully refreshed from Google Patents.
US4477178A
Expired / Lapsed
US
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Image forming apparatus
Assignee: Canon Inc
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Filing: 1979-12-04
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Granted: 1984-10-16
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Expires: 1999-12-04
Abstract
Abstract An image forming apparatus includes a process input device for setting various data for image formation, process unit for making images on a recording medium repeatedly in accordance with the data set by the input device, detection devices for detecting a trouble of the process unit, a control unit for selectively controlling the detecting operations of the detection devices, and circuitry for preventing the image forming operation in response to the detection of a trouble by the detection devices. In the apparatus, diagnosis is executed for objects to which it is necessary and the image forming process is controlled by the outcome of the diagnosis.
Inventors
- 👤 Katsushi Furuichi
- 👤 Yoshikazu Yokomizo
- 👤 Toshio Honma
- 👤 Katsumi Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:54
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/55; B; B65; B65H; B65H39/00; B65H39/10; B65H39/11; B65H2408/00; B65H2408/10; B65H2408/11; B65H2408/111
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
66 words
An image forming apparatus comprising: process input means for setting various data for image formation; process means for forming images on a recording medium repeatedly in accordance with the data set by said process input means; a plurality of ranked detection means for detecting trouble in said process means; means for making an indication in response to a detection of trouble by said detection means; and
Claim 2
Dependent Claim
66 words
An image forming apparatus comprising: process input means for setting various data for image formation; process means for forming images on a recording medium repeatedly in accordance with the data set by said process input means; a plurality of ranked detection means for detecting trouble in said process means; means for making an indication in response to a detection of trouble by said detection means; and
Claim 3
Dependent Claim
21 words
means for enabling a cancellation of a said indication of a low-ranked trouble without removing the cause of the detected trouble.
Claim 4
Dependent Claim
21 words
means for enabling a cancellation of a said indication of a low-ranked trouble without removing the cause of the detected trouble.
Claim 5
Dependent Claim
37 words
Apparatus according to claim 1 wherein said apparatus further comprises means for cancelling data set by said process input means, and wherein said cancel enabling means cancels a said low-ranked indication using said process data cancelling means.
Claim 6
Dependent Claim
28 words
Apparatus according to claim 1 wherein said low-ranked detection means comprise objects to be diagnosed in parts of said apparatus which are not necessary for continued image formation.
Claim 7
Dependent Claim
45 words
Apparatus according to claim 3 wherein said process means includes means for distributing and receiving a recording medium having image formed thereon or means for automatically feeding an original, and said low-ranked detection means include a trouble sensor at said receiving means and feeding means.
Claim 8
Dependent Claim
37 words
Apparatus according to claim 4 wherein said trouble sensor comprises a switch for detecting opening and closing of a side plate of said receiving means or a switch for detecting said recording medium at said receiving means.
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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |