US4761667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus
Assignee: Sanyo Electric Co Ltd
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Filing: 1986-11-19
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Granted: 1988-08-02
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Expires: 2006-11-19
Abstract
Abstract An image forming apparatus includes a detachable sub-assembly consisting of a latent image holder drum and cleaning means in a unitary assembly, whereby after the sub-assembly is removed from the image forming apparatus, the cleaning device and latent image holder drum can be individually separated from the sub-assembly. Also, a peel-off device is mounted on the sub-assembly for peeling recording paper away from the latent image holder drum.
Inventors
- 👤 Kiyoshi Miyai
- 👤 Shuhei Uotani
- 👤 Toyohiko Tsunemine
- 👤 Yujiro Kohmoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:43
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/18; G03G21/1803; G03G21/1817; G03G21/1821; G03G15/00; G03G15/65; G03G15/6532; G03G21/1604; G03G21/1623; G03G21/1661; G03G21/1671; G03G2221/00; G03G2221/16; G03G2221/1651; G03G2221/1654; G03G2221/1672; G03G2221/1678; G03G2221/18; G03G2221/183; G03G2221/1853; Y; Y10; Y10S; Y10S271/00; Y10S271/90
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
139 words
An image forming apparatus including a latent image holder which forms on the surface thereof latent images, develops said latent images by toner, and transfers said toner images to a recording paper; and a cleaning means for removing the residual toner from said latent image holder; said latent image holder and cleaning means being coupled integrally with a chassis mounted detachably on a body, wherein the improvement comprises: said latent image holder and said cleaning means being detachably coupled with each other; said chassis including first and second auxiliary chassis on which said latent image holder and cleaning means are mounted, respectively, said first and second auxiliary chassis being coupled detachably and integrally with each other; and said second auxiliary chassis being provided with peel-off means for peeling off from said latent image holder said recording paper attached thereto.
Claim 2
Dependent Claim
139 words
An image forming apparatus including a latent image holder which forms on the surface thereof latent images, develops said latent images by toner, and transfers said toner images to a recording paper; and a cleaning means for removing the residual toner from said latent image holder; said latent image holder and cleaning means being coupled integrally with a chassis mounted detachably on a body, wherein the improvement comprises: said latent image holder and said cleaning means being detachably coupled with each other; said chassis including first and second auxiliary chassis on which said latent image holder and cleaning means are mounted, respectively, said first and second auxiliary chassis being coupled detachably and integrally with each other; and said second auxiliary chassis being provided with peel-off means for peeling off from said latent image holder said recording paper attached thereto.
Claim 3
Dependent Claim
16 words
The image forming apparatus of claim 1, wherein said peel-off means consists of a peel-off pawl.
Claim 4
Dependent Claim
39 words
An image forming apparatus as set forth in claim 2, wherein said peel-off pawl is pivotally supported to a support shaft provided at said chassis and extending axially in parallel to a rotary shaft for said latent image holder.
Claim 5
Dependent Claim
33 words
An image forming apparatus as set forth in claim 3, wherein a pair of rollers for passing said recording paper after said toner images are transferred thereon are mounted rotatably on said chassis.
Claim 6
Dependent Claim
41 words
An image forming apparatus as set forth in claim 3, wherein said peel-off pawl is put at the upstream side end thereof in the paper passing direction into a groove provided circumferentially on one axial end of said latent image holder.
Claim 7
Dependent Claim
39 words
The image forming apparatus of claim 3, wherein a pair of transfer rollers are mounted on said second auxiliary chassis, whereby a support shaft attached to said second auxiliary chassis supports said peel-off pawl, and one of said rollers.
Claim 8
Dependent Claim
53 words
An image forming apparatus as set forth in claim 2, wherein the end of said peel-off pawl at the upstream side in the paper passing direction is formed in acute angle and said peel-off pawl is given a biasing force so as to be biased onto the surface of said latent image holder.
Claim 9
Dependent Claim
46 words
An image forming apparatus as set forth in claim 7, wherein said biasing force is rotation moment caused by a weight provided at the reverse side beyong said support shaft to the end of said peel-off pawl at the upstream side in the upper passing direction.
Claim 10
Dependent Claim
120 words
An image forming apparatus which develops with toner latent images formed on the surface of a latent image holder, said toner images being transferred onto a recording paper, wherein the improvement comprises said latent image holder being mounted on a chassis detachably mounted on a body, said chassis being provided with peel-off means for peeling off from said latent image holder said recording paper attached thereto, and a pair of rollers positioned with respect to said peel-off means for receiving said recording paper therefrom, for passing said recording paper away from said latent image holder, said peel-off means being wholly located between said latent image holder and the one of said pair of rollers closest to said latent image holder.
Claim 11
Dependent Claim
120 words
An image forming apparatus which develops with toner latent images formed on the surface of a latent image holder, said toner images being transferred onto a recording paper, wherein the improvement comprises said latent image holder being mounted on a chassis detachably mounted on a body, said chassis being provided with peel-off means for peeling off from said latent image holder said recording paper attached thereto, and a pair of rollers positioned with respect to said peel-off means for receiving said recording paper therefrom, for passing said recording paper away from said latent image holder, said peel-off means being wholly located between said latent image holder and the one of said pair of rollers closest to said latent image holder.
Claim 12
Dependent Claim
19 words
An image forming apparatus as set forth in claim 9 wherein said chassis is provided with a cleaning means.
Claim 13
Dependent Claim
110 words
An image forming apparatus which develops with toner latent images formed on the surface of a latent image holder, said toner images being transferred onto a recording paper, wherein the improvement comprises said latent image holder being mounted on a chassis detachably mounted on a body, said chassis including two auxiliary chassis, one of said auxiliary chassis being provided with and supporting both peel-off means for peeling off from said latent image holder said recording paper attached thereto, and a pair of rollers for passing said recording paper after said toner images are transferred thereon, the other of said auxiliary chassis being provided with and supporting said latent image holder.
Claim 14
Dependent Claim
110 words
An image forming apparatus which develops with toner latent images formed on the surface of a latent image holder, said toner images being transferred onto a recording paper, wherein the improvement comprises said latent image holder being mounted on a chassis detachably mounted on a body, said chassis including two auxiliary chassis, one of said auxiliary chassis being provided with and supporting both peel-off means for peeling off from said latent image holder said recording paper attached thereto, and a pair of rollers for passing said recording paper after said toner images are transferred thereon, the other of said auxiliary chassis being provided with and supporting said latent image holder.
Claim 15
Dependent Claim
21 words
An image forming apparatus as set forth in claim 11, wherein said pair of rollers are aligned with said peel-off means.
Claim 16
Dependent Claim
41 words
An image forming apparatus as set forth in claim 11, wherein said chassis is provided with a cleaning means, with said cleaning means being supporting on the same auxiliary chassis on which said peel-off means and pair of rollers are supported.
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) | 1991-08-02 | 1992-02-01 | 1992-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-02 | 1996-02-01 | 1996-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-02 | 2000-02-01 | 2000-08-02 | $7700.00 | Window Closed / Lapsed |