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US5260751A
Expired / Lapsed
US
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Image forming apparatus with variable speed recording material carrying means
Assignee: Canon Inc
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Filing: 1992-09-10
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Granted: 1993-11-09
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Expires: 2012-09-10
Abstract
Abstract An image forming apparatus which can change its transfer drum speed includes an image bearing member for bearing a toner image, a transfer drum for moving while carrying a recording medium, a rotating fixing member having first and second fixing speeds, and a driving member for the transfer drum for varying the moving speed of the transfer drum (after the completion of an image transfer operation) in accordance with the fixing speed.
Inventors
- 👤 Mitsugu Inomata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:18
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064; G03G15/01; G03G15/0105; G03G15/0131; G03G15/14; G03G15/16; G03G15/1665; G03G15/167; G03G15/2039; G03G15/2046; G03G15/65; G03G15/6588; G03G15/6591; G03G2215/00; G03G2215/00362; G03G2215/00443; G03G2215/00493; G03G2215/00497; G03G2215/01; G03G2215/019; G03G2215/0196; G03G2215/20; G03G2215/2003; G03G2215/2045
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
120 words
An image forming apparatus, comprising: a recording-medium carrying member rotating while carrying a recording medium; image forming means for forming an image on the recording medium carried by said recording-medium carrying member; driving means for driving said recording-medium carrying member at a first circumferential speed while the image is formed and at a second circumferential speed which is lower than the first circumferential speed; and fixing means for fixing the image on the recording medium, said fixing means being capable of fixing the image at a fixing speed which is lower than said first circumferential speed, wherein after the image has been formed on the recording medium, said driving means drives said recording-medium carrying means at the second circumferential speed.
Claim 2
Dependent Claim
120 words
An image forming apparatus, comprising: a recording-medium carrying member rotating while carrying a recording medium; image forming means for forming an image on the recording medium carried by said recording-medium carrying member; driving means for driving said recording-medium carrying member at a first circumferential speed while the image is formed and at a second circumferential speed which is lower than the first circumferential speed; and fixing means for fixing the image on the recording medium, said fixing means being capable of fixing the image at a fixing speed which is lower than said first circumferential speed, wherein after the image has been formed on the recording medium, said driving means drives said recording-medium carrying means at the second circumferential speed.
Claim 3
Dependent Claim
17 words
An image forming apparatus according to claim 1, wherein said fixing speed equals said second circumferential speed.
Claim 4
Dependent Claim
32 words
An image forming apparatus according to claim 1, wherein said driving means switches from said first circumferential speed to said second circumferential speed while said recording-medium carrying member carries the recording medium.
Claim 5
Dependent Claim
24 words
An image forming apparatus according to claim 1, wherein said fixing means is capable of fixing the image at first and second fixing speeds.
Claim 6
Dependent Claim
25 words
An image forming apparatus according to claim 4, wherein said fixing means switches the fixing speed in accordance with a type of the recording material.
Claim 7
Dependent Claim
34 words
An image forming apparatus according to claim 1, further comprising: an image bearing member for bearing the image; and transfer means for transferring the image on said image bearing member onto the recording medium.
Claim 8
Dependent Claim
120 words
An image forming apparatus, comprising: an image bearing member for bearing an unfixed image; a recording-medium carrying member moving while carrying a recording medium, the unfixed image on said image bearing member being transferred onto the recording medium carried by said recording-medium carrying means; and fixing means for fixing the image on the recording medium, said fixing means being capable of performing a fixing operation at a first fixing speed and a fixing operation at a second fixing speed different from said first fixing speed, wherein a moving speed of said recording-medium carrying member after the completion of the transfer operation differs between the fixing operation at said first fixing speed and the fixing operation at said second fixing speed.
Claim 9
Dependent Claim
120 words
An image forming apparatus, comprising: an image bearing member for bearing an unfixed image; a recording-medium carrying member moving while carrying a recording medium, the unfixed image on said image bearing member being transferred onto the recording medium carried by said recording-medium carrying means; and fixing means for fixing the image on the recording medium, said fixing means being capable of performing a fixing operation at a first fixing speed and a fixing operation at a second fixing speed different from said first fixing speed, wherein a moving speed of said recording-medium carrying member after the completion of the transfer operation differs between the fixing operation at said first fixing speed and the fixing operation at said second fixing speed.
Claim 10
Dependent Claim
51 words
An image forming apparatus according to claim 7, wherein said first fixing speed is lower than said second fixing speed, and wherein the moving speed of said recording-material carrying member is lower in the fixing operation at said first fixing speed than in the fixing operation at said second fixing speed.
Claim 11
Dependent Claim
28 words
An image forming apparatus according to claim 7, wherein the moving speed of said recording-material carrying member after the completion of the transfer operation equals the fixing speed.
Claim 12
Dependent Claim
33 words
An image forming apparatus according to claim 7, wherein said fixing means selects one of said first fixing speed and said second fixing speed in accordance with a type of the recording material.
Claim 13
Dependent Claim
51 words
An image forming apparatus according to claim 10, wherein a distance between a separation position of the recording medium from said recording-medium carrying member and a fixing position adjacent said fixing means is smaller than a length of a recording material for which said fixing means selects a slow fixing speed.
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) | 1996-11-08 | 1997-05-10 | 1997-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-08 | 2001-05-10 | 2001-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-08 | 2005-05-10 | 2005-11-09 | $7700.00 | Window Closed / Lapsed |