US4437757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus with cleaning means
Assignee: Canon Inc
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Filing: 1981-01-22
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Granted: 1984-03-20
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Expires: 2001-01-22
Abstract
Abstract In a copying device for forming a latent image on a rotatable image bearing member, such member has a portion which is not used for image formation. The latent image is developed into a toner image on the rotatable member, and a cleaning device is provided for cleaning the rotatable member to permit its reuse. An improvement is provided wherein a device detects the rotational disposition of the image bearing member, and positions the portion of such member which is not used for image formation in alignment with the cleaning device when the rotatable member is stopped.
Inventors
- 👤 Shigehiro Komori
- 👤 Hisashi Sakamaki
- 👤 Hiroyuki Hattori
- 👤 Toshihide Iida
- 👤 Koichi Miyamoto
- 👤 Kazumi Umezawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:59
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28; G03G15/30; G03G15/302; G03G21/00; G03G21/20; G03G21/206
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
111 words
An image forming apparatus comprising: a rotatable member; means for forming a latent image on said rotatable member, said rotatable member having a portion which is not used for latent image formation; developing means for applying a developer to the latent image on said rotatable member to form a toner image; means for transferring the toner image onto a transfer material; means for cleaning said rotatable member to permit reuse of said member for image formation; and means for detecting a predetermined rotational position of said rotatable member and for stopping said rotatable member at the detected predetermined position where said non-image-forming portion of said rotatable member faces said cleaning means.
Claim 2
Dependent Claim
111 words
An image forming apparatus comprising: a rotatable member; means for forming a latent image on said rotatable member, said rotatable member having a portion which is not used for latent image formation; developing means for applying a developer to the latent image on said rotatable member to form a toner image; means for transferring the toner image onto a transfer material; means for cleaning said rotatable member to permit reuse of said member for image formation; and means for detecting a predetermined rotational position of said rotatable member and for stopping said rotatable member at the detected predetermined position where said non-image-forming portion of said rotatable member faces said cleaning means.
Claim 3
Dependent Claim
46 words
An image forming apparatus in accordance with claim 1, wherein said cleaning means contacts said rotatable image forming member, and wherein said detecting means stops the rotatable member at the said detected predetermined position wherein said non-image-forming portion of said rotatable member contacts said cleaning means.
Claim 4
Dependent Claim
24 words
An image forming apparatus in accordance with claim 1, wherein said cleaning means includes a cleaning blade disposed in contact with said rotatable member.
References Cited (Backward Citations)
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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) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |