US5519475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus with peripheral speed difference between image bearing and transfer members
Assignee: Canon Inc
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Filing: 1994-09-07
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Granted: 1996-05-21
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Expires: 2014-09-07
Abstract
Abstract An image forming apparatus includes an image bearing member; a device for forming a toner image on the image bearing member; an intermediate transfer member for receiving the toner image from the image bearing member; and wherein the intermediate transfer member has an average surface roughness which is smaller than one half a size of one pixel.
Inventors
- 👤 Toshio Miyamoto
- 👤 Koichi Tanigawa
- 👤 Kazuaki Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:52
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1605
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
87 words
An image forming apparatus comprising: an image bearing member; image forming means for forming a toner image on said image bearing member; an intermediate transfer member, contacted to said image bearing member, for receiving the toner image from said image bearing member at the contact position; wherein a peripheral speed difference a (%) between said image bearing member and said intermediate transfer member satisfies: (0.5≦a≦3) wherein an average surface roughness R z of said intermediate transfer member and a length L of one pixel satisfy: R.sub.z <(L/2)×{(a/10)+1}.
Claim 2
Dependent Claim
87 words
An image forming apparatus comprising: an image bearing member; image forming means for forming a toner image on said image bearing member; an intermediate transfer member, contacted to said image bearing member, for receiving the toner image from said image bearing member at the contact position; wherein a peripheral speed difference a (%) between said image bearing member and said intermediate transfer member satisfies: (0.5≦a≦3) wherein an average surface roughness R z of said intermediate transfer member and a length L of one pixel satisfy: R.sub.z <(L/2)×{(a/10)+1}.
Claim 3
Dependent Claim
35 words
An apparatus according to claim 1, wherein a plurality of toner images are overlyingly transferred onto said intermediate transfer member, and the plurality of the toner images are transferred onto a transfer material all together.
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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) | 1999-05-21 | 1999-11-20 | 2000-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-21 | 2003-11-20 | 2004-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-21 | 2007-11-20 | 2008-05-21 | $7700.00 | Window Closed / Lapsed |