US4563076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging apparatus
Assignee: Ricoh Co Ltd
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Filing: 1984-07-27
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Granted: 1986-01-07
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Expires: 2004-07-27
Abstract
Abstract An electrophotographic copying machine includes a main housing and an internal frame which can be detachably mounted in position defined in the main housing. The internal frame supports a photosensitive member in the form of an endless belt and a grid electrode. The main housing is provided with a corona discharger comprised of a corona wire and a casing partly surrounding the corona wire to define an opening through which corona ions are emitted. When the internal frame is mounted in position in the main housing, the grid electrode comes to be located opposite to the opening thereby functioning as a part of the corona discharger. Thus, when the internal frame is dismounted, the opening of corona discharger is exposed thereby allowing easy access to the corona wire.
Inventors
- 👤 Sadao Takahashi
- 👤 Yukihiro Ohno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:54
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/02; G03G15/0258
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
145 words
An imaging apparatus comprising: a main housing; a corona discharger mounted on said housing, said corona disacharger including a corona emitting means and a casing partly surrounding said corona emitting means and defining an opening; an internal frame which is detachably mounted in position in said housing, said internal frame supporting an image bearing means and a grid electrode which is located opposite to said opening when said internal frame is mounted in position, thereby allowing said corona discharger to cooperate with said grid electrode for uniformly charging said image bearing means; means mounted on said housing for forming an electrostatic latent image on said image bearing means by having the uniform charge dissipated selectively according to image information; and developing means mounted on said housing for developing said latent image on said image bearing means thereby converting said latent image into a toner image.
Claim 2
Dependent Claim
145 words
An imaging apparatus comprising: a main housing; a corona discharger mounted on said housing, said corona disacharger including a corona emitting means and a casing partly surrounding said corona emitting means and defining an opening; an internal frame which is detachably mounted in position in said housing, said internal frame supporting an image bearing means and a grid electrode which is located opposite to said opening when said internal frame is mounted in position, thereby allowing said corona discharger to cooperate with said grid electrode for uniformly charging said image bearing means; means mounted on said housing for forming an electrostatic latent image on said image bearing means by having the uniform charge dissipated selectively according to image information; and developing means mounted on said housing for developing said latent image on said image bearing means thereby converting said latent image into a toner image.
Claim 3
Dependent Claim
35 words
The apparatus of claim 1 further comprising an image transfer unit mounted on said housing for transferring said toner image onto a transfer medium which is transported along a predetermined path defined in said housing.
Claim 4
Dependent Claim
22 words
The apparatus of claim 2 wherein said internal frame further supports cleaning means for cleaning said image bearing means after image transfer.
Claim 5
Dependent Claim
62 words
The apparatus of claim 2 wherein said housing is provided with a pair of guide rails and said internal frame is provided with a pair of engaging members which are slidably engageable with said pair of guide rails so that said internal frame may be set in position through engagement between said pair of guide rails and said pair of engaging members.
Claim 6
Dependent Claim
56 words
The apparatus of claim 4 wherein said housing is generally divided into top and bottom halves which are pivotally connected at one end thereby allowing said top half to be pivotally moved with respect to said bottom half to have an interior of said apparatus exposed along a dividing line between said top and bottom halves.
Claim 7
Dependent Claim
37 words
The apparatus of claim 5 wherein said pair of guide rails are fixedly mounted on said top half thereby allowing said internal frame to be detachably mounted in position within a space defined in said top half.
Claim 8
Dependent Claim
35 words
The apparatus of claim 1 wherein said image bearing means includes an photosensitive member in the form of an endless belt which is extended around a plurality of rollers rotatably supported by said internal frame.
Claim 9
Dependent Claim
24 words
The apparatus of claim 7 wherein said means for forming includes an exposure means for exposing said photosensitive member to light having image information.
References Cited (Backward Citations)
DE2827010A1
Cited
JPS5468638A
Cited
US4500195A
Cited
JPS57189176A
Cited
US4470689A
Cited
JPS58136056A
Cited
JPS58152262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |