US5274402A
Expired / Lapsed
US
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Image forming apparatus with fixer temperature control
Assignee: Canon Inc
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Filing: 1991-05-20
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Granted: 1993-12-28
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Expires: 2011-05-20
Abstract
Abstract An image forming apparatus includes a feeder means and a recorder. The feeder feeds a sheet of recording paper to a predetermined position in response to a spare paper feed signal instructing the feeding as the sheet of recording paper to the predetermined position preliminarily, and then feeds the sheet of recording paper being stopped at the predetermined position again in response to a record request signal. The recorder records an image on the sheet of recording paper fed by the feeder means through an electrophotographic process. The recorder means starts preparation to execute the electrophotographic process upon receiving the spare paper feed signal. As a results, throughput is increased without causing other problems.
Inventors
- 👤 Yoji Serizawa
- 👤 Akio Noguchi
- 👤 Yukihide Ushio
- 👤 Shimpei Matsuo
- 👤 Kazuro Yamada
- 👤 Seiji Uchiyama
- 👤 Makoto Takeuchi
- 👤 Koichi Suwa
- 👤 Koichi Hiroshima
- 👤 Shinichi Tsukida
- 👤 Manabu Takano
- 👤 Masahiro Goto
- 👤 Takahiro Inoue
- 👤 Hiromiichi Yamada
- 👤 Junichi Kato
- 👤 Masaki Ojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:49
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/20; G03G15/2003; G03G15/65; G03G15/6555; G03G15/6558; G03G15/6561; G03G15/6564; G06; G06K; G06K15/00; G06K15/02; G06K15/16; G03G2215/00; G03G2215/00362; G03G2215/00535; G03G2215/00556; G03G2215/00599
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
138 words
An image forming apparatus comprising: feeder means for feeding a sheet of recording paper to a predetermined position in response to a first signal instructing the feeding of the sheet of recording paper to the predetermined position, and for feeding the sheet of recording paper from the predetermined position in response to a second signal; image forming means for forming an image on an image carrier driven by driver means to rotate; transfer means for transferring an image formed on the image carrier to a sheet of recording paper; fixer means for thermally fixing an image transferred to a sheet of recording paper by said transfer means; and fixing temperature controller means for controlling a temperature of said fixer means, wherein said fixing temperature controller means starts to control said fixing temperature in response to the first signal.
Claim 2
Dependent Claim
138 words
An image forming apparatus comprising: feeder means for feeding a sheet of recording paper to a predetermined position in response to a first signal instructing the feeding of the sheet of recording paper to the predetermined position, and for feeding the sheet of recording paper from the predetermined position in response to a second signal; image forming means for forming an image on an image carrier driven by driver means to rotate; transfer means for transferring an image formed on the image carrier to a sheet of recording paper; fixer means for thermally fixing an image transferred to a sheet of recording paper by said transfer means; and fixing temperature controller means for controlling a temperature of said fixer means, wherein said fixing temperature controller means starts to control said fixing temperature in response to the first signal.
Claim 3
Dependent Claim
33 words
An image forming apparatus according to claim 1, wherein said image forming means has scanner means for scanning a light beam and said scanner means is driven in response to the first signal.
Claim 4
Dependent Claim
39 words
An image forming apparatus according to claim 1, wherein, when the second signal is generated without generating the first signal, said feeder means feeds a sheet of recording paper to the predetermined position in response to the second signal.
Claim 5
Dependent Claim
56 words
An image forming apparatus according to claim 1, wherein, when a second signal is not generated for a predetermined period after a sheet of recording paper is fed to the predetermined position, said fixing temperature controller controls a temperature of the fixer means so as to be kept at a temperature lower than the fixing temperature.
Claim 6
Dependent Claim
66 words
An image forming apparatus according to claim 1, further comprising means for converting code data into an image signal and for outputting the image signal to the image forming means, wherein said output means outputs the first signal prior to termination of a conversion to an image signal, and said output means outputs the second signal after the termination of the conversion to the image signal.
Claim 7
Dependent Claim
30 words
An image forming apparatus according to claim 1, further comprising means for generating a third signal indicating that the apparatus is in a state where the second signal is receivable.
References Cited (Backward Citations)
JPS57211168A
Cited
JPS6018371A
Cited
US4933772A
Cited
US4939554A
Cited
US4980717A
Cited
EP0343827A2
Cited
US4954848A
Cited
US5043771A
Cited
US5034780A
Cited
EP0362791A2
Cited
US5057874A
Cited
US4918489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-12-27 | 1997-06-28 | 1997-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-27 | 2001-06-28 | 2001-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-27 | 2005-06-28 | 2005-12-28 | $7700.00 | Window Closed / Lapsed |