US4330199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic device
Assignee: Canon Inc
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Filing: 1979-04-27
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Granted: 1982-05-18
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Expires: 1999-04-27
Abstract
Abstract A copying apparatus has a rotatable medium, processing apparatus including a charger for forming an image of an original on the rotatable medium and for transferring the image to a transfer material, a residual charge remover, a copy setting mechanism and a start switch. The rotatable medium is rotated during the copying operation with both the charger and residual charge remover operating and is post rotated after the copying operation with the charger disabled but the residual charge remover operating. When the start switch is operated during the post-rotation but before the charger becomes disabled, the charger remains operative and copying is restarted.
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
2026-10-28 18:05
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28; G03G15/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
212 words
A copying apparatus comprising: a rotatable medium; processing means, including charging means and means for imagewise exposing said rotatable medium, for forming an image of an original to be copied on said rotatable medium and for transferring the image onto a transfer material; means for removing residual charge on said rotatable medium; means for presetting a desired number of copies to be produced; means for instructing the start of an image forming process; means for operating said charging means during the formation of the preset number of copies and for rotating said rotatable medium during the operation of said processing means and removing means to produce the preset number of copies; post-rotation means for continuing the rotation of said rotatable medium for a predetermined time after termination of the image forming process with said charging means disabled and said removing means operating; and control means for controlling the restart of said processing means without completing the post-rotation in response to actuation of said instructing means before the termination of rotation of said rotatable medium but after termination of the image forming process, said control means being operable to maintain said charging means operative for immediate restart of the exposing operation when said instructing means is actuated before said charging means is disabled.
Claim 2
Dependent Claim
212 words
A copying apparatus comprising: a rotatable medium; processing means, including charging means and means for imagewise exposing said rotatable medium, for forming an image of an original to be copied on said rotatable medium and for transferring the image onto a transfer material; means for removing residual charge on said rotatable medium; means for presetting a desired number of copies to be produced; means for instructing the start of an image forming process; means for operating said charging means during the formation of the preset number of copies and for rotating said rotatable medium during the operation of said processing means and removing means to produce the preset number of copies; post-rotation means for continuing the rotation of said rotatable medium for a predetermined time after termination of the image forming process with said charging means disabled and said removing means operating; and control means for controlling the restart of said processing means without completing the post-rotation in response to actuation of said instructing means before the termination of rotation of said rotatable medium but after termination of the image forming process, said control means being operable to maintain said charging means operative for immediate restart of the exposing operation when said instructing means is actuated before said charging means is disabled.
Claim 3
Dependent Claim
25 words
An apparatus according to claim 1, wherein said charging means comprises a corona discharger for charging said rotatable medium before exposing the original image thereto.
Claim 4
Dependent Claim
18 words
An apparatus according to claim 1, wherein said charging means comprises a corona discharger for transferring the image.
Claim 5
Dependent Claim
15 words
An apparatus according to claim 1, wherein said removing means comprises an AC corona discharger.
Claim 6
Dependent Claim
36 words
An apparatus according to claim 1, wherein said process means further includes developing means, and said removing means comprises means, for applying uniform light, disposed at a position between said charging means and said developing means.
Claim 7
Dependent Claim
20 words
An apparatus according to claim 1, wherein said removing means comprises a corona discharger and means for applying uniform light.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |