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US4674857A
Expired / Lapsed
US
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Image recording apparatus
Assignee: Canon Inc
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Filing: 1985-10-02
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Granted: 1987-06-23
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Expires: 2005-10-02
Abstract
Abstract An image recording apparatus includes a rotatable transfer member and a plurality of latent image bearing members which are in rolling press-contact with the transfer member at different positions. Around the latent image bearing members, are provided latent image forming devices and devices for developing the latent image. The developed images formed on the respective latent image bearing members are transferred by pressure onto a recording material or onto the transfer member at the respective nips formed between the transfer member and one of the latent image bearing members. With this apparatus, duplex image recording, overprint or superimposing recording, and/or high speed recording can be accomplished.
Inventors
- 👤 Hiroshi Satomura
- 👤 Tatsuo Takeuchi
- 👤 Hidemi Egami
- 👤 Yukio Nagase
- 👤 Nagao Hosono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:31
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/23; G03G15/231; G03G15/238; G03G15/14; G03G15/16; G03G15/1605
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
123 words
An image forming apparatus, comprising: a first movable latent image bearing member for bearing a latent image; first latent image forming means for forming a latent image on said first latent image bearing member; first developing means for developing the latent image formed by said first latent image forming means; a second movable latent image bearing member for bearing a latent image; second latent image forming means for forming a latent image on said second latent image bearing member; second developing means for developing the latent image formed by said second latent image forming means; and means for transferring the images developed by said first and second developing means, said transferring means being common to said first and second latent image bearing members.
Claim 2
Dependent Claim
123 words
An image forming apparatus, comprising: a first movable latent image bearing member for bearing a latent image; first latent image forming means for forming a latent image on said first latent image bearing member; first developing means for developing the latent image formed by said first latent image forming means; a second movable latent image bearing member for bearing a latent image; second latent image forming means for forming a latent image on said second latent image bearing member; second developing means for developing the latent image formed by said second latent image forming means; and means for transferring the images developed by said first and second developing means, said transferring means being common to said first and second latent image bearing members.
Claim 3
Dependent Claim
25 words
An apparatus according to claim 1, wherein said transferring means includes a rotatable member contacting both said first and said second latent image bearing members.
Claim 4
Dependent Claim
18 words
An apparatus according to claim 2, wherein said rotatable member is press-contacted to said latent image bearing members.
Claim 5
Dependent Claim
65 words
An apparatus according to claim 1, wherein said transferring means includes a first transfer station for transferring the developed image from said first latent image bearing member and a second transfer station for transferring the developed image from said second latent image bearing member, said apparatus further comprising means for supplying a recording material to said first transfer station and to said second transfer station.
Claim 6
Dependent Claim
79 words
An apparatus according to claim 2, wherein a nip is defined between said rotatable member and said second latent image bearing member, and wherein a first developed image formed on said first latent image bearing member is transferred onto said rotatable member, and wherein the first developed image on said rotatable member and a second developed image formed on said second latent image bearing member are simultaneously transferred onto respective sides of a recording material fed into said nip.
Claim 7
Dependent Claim
78 words
An apparatus according to claim 1, wherein said transferring means includes a first transfer station for transferring a first developed image from said first latent image bearing member and a second transfer station for transferring a second developed image from said second latent image bearing member, wherein a recording material is conveyed through said first transfer station, where it receives the first developed image, and then through said second transfer station, where it receives the second developed image.
Claim 8
Dependent Claim
27 words
An apparatus according to claim 6, wherein the recording material receives both the first and the second developed images on the same side of the recording material.
Claim 9
Dependent Claim
27 words
An apparatus according to claim 6, wherein the recording material receives the first and second developed images on first and second sides of the recording material, respectively.
Claim 10
Dependent Claim
25 words
An apparatus according to claim 1, wherein said first and second latent image bearing members are drumshaped, and are equal to each other in diameter.
Claim 11
Dependent Claim
116 words
An image forming apparatus, comprising: a first rotatable latent image bearing member for bearing a latent image; a second rotatable latent image bearing member for bearing a latent image; latent image forming means for forming latent images on said latent image bearing members; developing means for developing the latent images formed by said first and by said second latent image forming means; a first rotatable transfer member; and a second rotatable transfer member, wherein said first transfer member forms a first nip with said first latent image bearing member and a second nip with said second latent image bearing member, and said second transfer member forms a third nip with said second latent image bearing member.
Claim 12
Dependent Claim
116 words
An image forming apparatus, comprising: a first rotatable latent image bearing member for bearing a latent image; a second rotatable latent image bearing member for bearing a latent image; latent image forming means for forming latent images on said latent image bearing members; developing means for developing the latent images formed by said first and by said second latent image forming means; a first rotatable transfer member; and a second rotatable transfer member, wherein said first transfer member forms a first nip with said first latent image bearing member and a second nip with said second latent image bearing member, and said second transfer member forms a third nip with said second latent image bearing member.
Claim 13
Dependent Claim
31 words
An apparatus according to claim 10, further comprising means for supplying a recording material into said first, second and third nips, at each of which nips an image can be transferred.
Claim 14
Dependent Claim
67 words
An apparatus according to claim 10, wherein a first developed image formed on said first latent image bearing member is transferred onto said first transfer member, and a second developed image formed on said second latent image bearing member is transferred onto said second transfer member, and then the first and second developed images are transferred onto respective sides of a recording material at said second nip.
Claim 15
Dependent Claim
60 words
An apparatus according to claim 10, further comprising means for supplying a recording material into said first nip, wherein the recording material receives on its first side a first developed image from said first latent image bearing member at said first nip, and thereafter, receives on its opposite side a second developed image from said second latent image bearing member.
Claim 16
Dependent Claim
40 words
An apparatus according to claim 10, further comprising means for supplying a recording material into at least two of said nips, and wherein an image can be transferred onto the recording material at each of said at least two nips.
Claim 17
Dependent Claim
28 words
An apparatus according to claim 10, wherein said latent image forming means forms the latent image by charging and exposing the latent image bearing member to image-wise light.
Claim 18
Dependent Claim
14 words
An apparatus according to claim 10, wherein said transfer members have same peripheral length.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |