Patent US5153654A successfully refreshed from Google Patents.
US5153654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus having transfer member for carrying transfer material
Assignee: Canon Inc
•
Filing: 1991-08-05
•
Granted: 1992-10-06
•
Expires: 2011-08-05
Abstract
Abstract An image forming apparatus includes a movable image bearing member; an image forming device for forming an image on the image bearing member; and a transfer device for transferring the image from the image bearing member onto a transfer material, the transfer device including a movable transfer member contacted to the image bearing member and for conveying the transfer material by the contact portion. The transfer member is disposed in such a direction that a surface friction in the direction of the movement of the transfer member relative to the image bearing member is large.
Inventors
- 👤 Takayasu Yuminamochi
- 👤 Koichi Tanigawa
- 👤 Akihiko Takeuchi
- 👤 Hiroshi Sasame
- 👤 Yasumasa Ohtsuka
- 👤 Hiroto Hasegawa
- 👤 Hideyuki Yano
- 👤 Hideo Nanataki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:28
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1665; G03G15/167
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
114 words
An image forming apparatus, comprising: a movable image bearing member; image forming means for forming an image on said image bearing member; transfer means for transferring the image from said image bearing member onto a transfer material, said transfer means including a movable transfer member contacting said image bearing member and for conveying the transfer material by the contact portion thereof; wherein the coefficient of friction between said image bearing member and said transfer member during conveyance of the transfer material in the movement direction of the transfer material is larger than the coefficient of friction between the said image bearing member and said transfer member in a direction opposite from the movement direction.
Claim 2
Dependent Claim
114 words
An image forming apparatus, comprising: a movable image bearing member; image forming means for forming an image on said image bearing member; transfer means for transferring the image from said image bearing member onto a transfer material, said transfer means including a movable transfer member contacting said image bearing member and for conveying the transfer material by the contact portion thereof; wherein the coefficient of friction between said image bearing member and said transfer member during conveyance of the transfer material in the movement direction of the transfer material is larger than the coefficient of friction between the said image bearing member and said transfer member in a direction opposite from the movement direction.
Claim 3
Dependent Claim
14 words
An apparatus according to claim 1, wherein said transfer member is a rotatable member.
Claim 4
Independent Claim
30 words
An apparatus according to claims 1 or 2, wherein the conveying speed of the transfer material at the contact portion is larger than the movement of said image bearing member.
Claim 5
Dependent Claim
18 words
An apparatus according to claim 3, wherein the conveying speed is larger than the movement speed by 0.5-3%.
Claim 6
Dependent Claim
22 words
An apparatus according to claim 1, wherein said transfer means including voltage application means for applying a voltage to said transfer member.
Claim 7
Dependent Claim
20 words
An apparatus according to claim 1, wherein said transfer member has a surface having been abraded at the contact portion.
Claim 8
Dependent Claim
16 words
An apparatus according to claim 6, wherein said transfer member has a surface EPDM sponge layer.
Claim 9
Dependent Claim
19 words
An apparatus according to claim 6, wherein said transfer member has a solid silicone rubber layer at its surface.
Claim 10
Dependent Claim
45 words
An apparatus according to claim 1, further comprising feeding means for feeding the transfer material to the contact portion, and wherein the transfer material feeding speed generated by said feeding means is larger than the movement speed of a surface of said image bearing member.
Claim 11
Dependent Claim
18 words
An apparatus according to claim 9, wherein the conveying speed is larger than the movement speed by 0.5-3%.
Claim 12
Dependent Claim
15 words
An apparatus according to claim 1, wherein said image bearing member is a photosensitive member.
References Cited (Backward Citations)
US3788203A
Cited
US4309803A
Cited
US4401383A
Cited
US4482240A
Cited
US5038178A
Cited
US4958194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-06 | 1996-04-06 | 1996-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-06 | 2000-04-06 | 2000-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-06 | 2004-04-06 | 2004-10-06 | $7700.00 | Window Closed / Lapsed |