US5073799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus which alters stand-by temperature of the fixing device according to toner color
Assignee: Canon Inc
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Filing: 1989-08-31
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Granted: 1991-12-17
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Expires: 2009-08-31
Abstract
Abstract An image forming apparatus which can develop a latent image formed on a latent image bearing member with a selected one of a first toner and a second toner different from the first toner. A fixing member is provided for fixing a toner image, and includes a heat member heated by a heat source being contacted with the toner image. A controller is provided for adjusting a temperature difference between a stand-by temperature and the fixing temperature in accordance with the selected toner.
Inventors
- 👤 Tsuyoshi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:14
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2039; G03G15/205
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
An image forming apparatus which can develop a latent image formed on a latent image bearing member with a selected one of a first toner and a second toner different from the first toner, said image forming apparatus comprising: fixing means for fixing a toner image, said fixing means including a heat member heated by a heat source and contacted with the toner image; and means for adjusting a temperature difference between a stand-by temperature and a fixing temperature in accordance with the selected toner, wherein the stand-by temperature of the first toner and the stand-by temperature of the second toner are different from each other.
Claim 2
Dependent Claim
106 words
An image forming apparatus which can develop a latent image formed on a latent image bearing member with a selected one of a first toner and a second toner different from the first toner, said image forming apparatus comprising: fixing means for fixing a toner image, said fixing means including a heat member heated by a heat source and contacted with the toner image; and means for adjusting a temperature difference between a stand-by temperature and a fixing temperature in accordance with the selected toner, wherein the stand-by temperature of the first toner and the stand-by temperature of the second toner are different from each other.
Claim 3
Dependent Claim
73 words
An image forming apparatus according to claim 1, wherein said adjusting means includes: temperature detecting element for detecting a temperature of a contact surface between said heat member and the toner image; and control means for controlling said heat source so that a detection output from said temperature detecting element has a predetermined set value, wherein the temperature of said heat member in a stand-by condition is altered by altering the set value.
Claim 4
Dependent Claim
65 words
An image forming apparatus according to claim 1, wherein said heat source comprises a heated rotary member heated by said heat source, and wherein said fixing means further includes a back-up rotary member pressed against said heated rotary member, whereby the toner image is fixed by passing a bearing medium bearing the toner image through between said heated rotary member and said backup rotary member.
Claim 5
Dependent Claim
46 words
An image forming apparatus according to claim 1, wherein said adjusting means includes a discriminating means for discriminating a kind of toner, and wherein a temperature of said heat member in a stand-by condition is altered in response to a discriminating signal from said discriminating means.
Claim 6
Dependent Claim
68 words
An image forming apparatus according to claim 4, further comprising a first developing container for accommodating the first toner and a second developing container accommodating the second toner, said first and second developing containers being adapted for positioning in either a developing position or a non-developing position, wherein said discriminating means discriminates the kind of toner in accordance with the position of said first and second developing containers.
Claim 7
Dependent Claim
52 words
An image forming apparatus according to claim 4, wherein a first developing container accommodating the first toner is replaceable by a second developing container accommodating the second toner, and wherein said discriminating means discriminates the kind of toner by the insertion of one of the developing container into the image forming apparatus.
Claim 8
Dependent Claim
50 words
An image forming apparatus according to claim 1, wherein the first toner comprises a magnetic toner including a magnetic component and the second toner comprising a non-magnetic toner not including magnetic component, and wherein a stand-by temperature of said second toner is selected higher than that of the first toner.
Claim 9
Dependent Claim
105 words
An image forming apparatus which can develop a latent image formed on a latent image bearing member with a selected one of a first toner and a second toner different from the first toner, said image forming apparatus comprising: fixing means for fixing a toner image, said fixing means including a heat member heated by a heat source and contacted with the toner image; and means for adjusting a temperature difference between a stand-by temperature and a fixing temperature in accordance with the selected toner, the fixing temperature of the first toner and the fixing temperature of the second toner are different from each other.
Claim 10
Dependent Claim
105 words
An image forming apparatus which can develop a latent image formed on a latent image bearing member with a selected one of a first toner and a second toner different from the first toner, said image forming apparatus comprising: fixing means for fixing a toner image, said fixing means including a heat member heated by a heat source and contacted with the toner image; and means for adjusting a temperature difference between a stand-by temperature and a fixing temperature in accordance with the selected toner, the fixing temperature of the first toner and the fixing temperature of the second toner are different from each other.
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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) | 1994-12-16 | 1995-06-17 | 1995-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-16 | 1999-06-17 | 1999-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-16 | 2003-06-17 | 2003-12-17 | $7700.00 | Window Closed / Lapsed |