Patent US4956676A successfully refreshed from Google Patents.
US4956676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrographic color printer/copier
Assignee: Intel Corp
•
Filing: 1987-05-12
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Granted: 1990-09-11
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Expires: 2007-05-12
Abstract
Abstract An electrographic printer/copier capable of producing color prints is disclosed. The color printer/copier comprises a housing, a source of paper and an output for the paper after it is imprinted, a photoconductive member, and a developer unit containing toners of multiple colors. On successive revolutions of the photoconductive member, the developer unit applies a different colored toner to the photoconductive member. After each revolution of the photoconductive belt, the image developed in a particular color is transferred to and retained on a transfer belt. When all of the different colored images have been transferred to the transfer belt, a sheet of paper is brought into contact with the transfer belt and the fully developed color image is transferred to the sheet of paper. In a preferred embodiment, the photoconductive member is a vertically aligned photoconductive belt. The transfer belt is horizontally aligned and located above the photoconductive belt. The sheet of paper travels along a substantially planar paper path located either above or below the transfer belt and the fully developed color image is transferred to the sheet of paper.
Inventors
- 👤 Kensuke Fukae
- 👤 Koichi Kinoshita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:29
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1605; G03G15/01; G03G15/0142; G03G15/0147; G03G15/0152; G03G15/0173; G03G2215/00; G03G2215/01; G03G2215/0167; G03G2215/0174
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
119 words
An electrographic printing apparatus for imprinting information on a sheet of paper or the like, comprising a housing, a source of paper and an output for said paper after it is imprinted, a paper path along which said paper travels within said printing apparatus, a photoconductive member for storing a latent electrostatic image of information to be imprinted, developer means for developing said latent electrostatic image on said photoconductive member, a transfer belt cooperating with said photoconductive member for receiving said developed image from said photoconductive member and for transferring said developed image to said paper, said transfer belt comprising a first layer made from a dielectric insulating material, and a second layer made from a flexible conductive material.
Claim 2
Dependent Claim
119 words
An electrographic printing apparatus for imprinting information on a sheet of paper or the like, comprising a housing, a source of paper and an output for said paper after it is imprinted, a paper path along which said paper travels within said printing apparatus, a photoconductive member for storing a latent electrostatic image of information to be imprinted, developer means for developing said latent electrostatic image on said photoconductive member, a transfer belt cooperating with said photoconductive member for receiving said developed image from said photoconductive member and for transferring said developed image to said paper, said transfer belt comprising a first layer made from a dielectric insulating material, and a second layer made from a flexible conductive material.
Claim 3
Dependent Claim
29 words
The electrographic printing apparatus of claim 1 wherein said developer means contains toners of more than one color, said developer means being operative to produce a multicolored developed image.
Claim 4
Dependent Claim
43 words
The electrographic printing apparatus of claim 1 wherein said developer means includes multiple compartments, each of said compartments containing a different colored toner, and means for applying said different color toners to said electrostatic latent image upon successive revolutions of said photoconductive member.
Claim 5
Dependent Claim
15 words
The electrostatic printing apparatus of claim 1 wherein said photoconductive member comprises a photoconductive belt.
Claim 6
Dependent Claim
17 words
The electrographic printing apparatus of claim 1 wherein said photoconductive member comprises a vertically mounted photoconductive belt.
Claim 7
Dependent Claim
14 words
The electrographic printing apparatus of claim 1 wherein said transfer belt is horizontally mounted.
Claim 8
Dependent Claim
28 words
The electrographic printing apparatus of claim 1 wherein said photoconductive member comprises a vertically mounted photoconductive belt and said transfer belt is horizontally mounted above said photoconductive belt.
Claim 9
Dependent Claim
16 words
The electrographic printing apparatus of claim 1 wherein said transfer belt includes a dielectric insulating layer.
Claim 10
Dependent Claim
15 words
The electrographic printing apparatus of claim 1 wherein said transfer belt is made from rubber.
Claim 11
Dependent Claim
26 words
The electrographic printing apparatus of claim 1 wherein said first layer is made from dielectrically insulating rubber, and said second layer is made from conductive rubber.
Claim 12
Dependent Claim
39 words
The electrographic printing apparatus of claim 1 wherein said transfer belt comes into contact with said paper from below in a transfer zone located in said paper path to transfer said developed image to the underside of said paper.
Claim 13
Dependent Claim
39 words
The electrographic printing apparatus of claim 1 wherein said transfer belt comes into contact with said paper from above in a transfer zone located in said paper path to transfer said developed image to the topside of said paper.
Claim 14
Dependent Claim
34 words
The electrographic printing apparatus of claim 1 further comprising an openable lid located near the top of the electrographic printing apparatus, said paper path being accessible from outside said housing upon opening said lid.
Claim 15
Dependent Claim
27 words
The electrographic printing apparatus of claim 1 further comprising a discharging unit for selectively discharging portions of said photoconductive member to form said electrostatic latent image thereon.
Claim 16
Dependent Claim
28 words
The electrographic printing apparatus of claim 1 further comprising an optical print head for selectively discharging portions of said photoconductive member to form said electrostatic latent image thereon.
Claim 17
Dependent Claim
19 words
The electrographic printing apparatus of claim 1 further comprising means for removing residual toner particles from said photoconductive member.
Claim 18
Dependent Claim
19 words
The electrographic printing apparatus of claim 1 further comprising means for removing residual toner particles from said transfer belt.
Claim 19
Dependent Claim
124 words
An electrographic color printing apparatus for imprinting information in color on a sheet of paper or the like, comprising a housing, a source of paper and an output for said paper after it is imprinted, a paper path along which said paper travels within said printing apparatus, a photoconductive member for storing a latent electrostatic image of information to be imprinted, developer means containing toners of multiple colors for developing said electrostatic image in multiple colors, a transfer belt cooperating with said photoconductive member for receiving said developed color image from said photoconductive member and for transferring said developed color image to said paper, wherein said photoconductive member comprises a vertically aligned photoconductive belt, and said transfer belt is located above said photoconductive belt.
Claim 20
Dependent Claim
124 words
An electrographic color printing apparatus for imprinting information in color on a sheet of paper or the like, comprising a housing, a source of paper and an output for said paper after it is imprinted, a paper path along which said paper travels within said printing apparatus, a photoconductive member for storing a latent electrostatic image of information to be imprinted, developer means containing toners of multiple colors for developing said electrostatic image in multiple colors, a transfer belt cooperating with said photoconductive member for receiving said developed color image from said photoconductive member and for transferring said developed color image to said paper, wherein said photoconductive member comprises a vertically aligned photoconductive belt, and said transfer belt is located above said photoconductive belt.
Claim 21
Dependent Claim
15 words
The electrographic color printing apparatus of claim 18 wherein said transfer belt is aligned horizontally.
Claim 22
Dependent Claim
17 words
The electrographic color printing apparatus of claim 18 wherein said transfer belt includes a dielectric insulating material.
Claim 23
Dependent Claim
41 words
The electrographic color printing apparatus of claim 20 wherein said transfer belt comes into contact with said paper from below in a transfer zone located in said paper path to transfer said developed color image to the underside of said paper.
Claim 24
Dependent Claim
41 words
The electrographic color printing apparatus of claim 20 wherein said transfer belt comes into contact with said paper from above in a transfer zone located in said paper path to transfer said developed color image to the topside of said paper.
Claim 25
Dependent Claim
36 words
The electrographic color printing apparatus of claim 20 further comprising an openable lid located near the top of the electrographic color printing apparatus, said paper path being accessible from outside said housing upon opening said lid.
Claim 26
Dependent Claim
28 words
The electrographic color printing apparatus of claim 23 further comprising a discharging unit for selectively discharging portions of said photoconductive member to form said electrostatic latent image thereon.
Claim 27
Dependent Claim
17 words
The electrographic color printing apparatus of claim 24 wherein said discharging unit comprises an optical print head.
Claim 28
Dependent Claim
20 words
The electrographic color printing apparatus of claim 25 further comprising means for removing residual toner particles from said photoconductive member.
Claim 29
Dependent Claim
20 words
The electrographic color printing apparatus of claim 26 further comprising means for removing residual toner particles from said transfer belt.
Claim 30
Dependent Claim
109 words
An electrographic printing apparatus for imprinting information in color on a sheet of paper or the like, comprising a rotatable photoconductive member, means for charging said photoconductve member, means for discharging selected portions of said photoconductive member to form an electrostatic latent image thereon, means for developing said latent image in different colors upon successive revolutions of said photoconductive belt, and means for receiving and retaining each of said developed color images, and for transferring them to said paper, wherein said receiving and retaining means comprises a transfer belt having a first layer made from a dielectric insulating material and a second layer made from a flexible conductive material.
Claim 31
Dependent Claim
109 words
An electrographic printing apparatus for imprinting information in color on a sheet of paper or the like, comprising a rotatable photoconductive member, means for charging said photoconductve member, means for discharging selected portions of said photoconductive member to form an electrostatic latent image thereon, means for developing said latent image in different colors upon successive revolutions of said photoconductive belt, and means for receiving and retaining each of said developed color images, and for transferring them to said paper, wherein said receiving and retaining means comprises a transfer belt having a first layer made from a dielectric insulating material and a second layer made from a flexible conductive material.
Claim 32
Dependent Claim
49 words
The electrographic printing apparatus of claim 28 wherein said photoconductive member is discharged to a first voltage, and said receiving, retaining, and transferring means is charged to a second voltage, said second voltage being effective to attract said developed color images from said photoconductive member to said trasfer belt.
Claim 33
Dependent Claim
119 words
An electrographic printing apparatus for imprinting information on a sheet of paper or the like, comprising a housing, a source of paper and an output for said paper after it is imprinted, a paper path along which said paper travels within said printing apparatus, a photoconductive member for storing a latent electrostatic image of information to be imprinted, developer means for developing said latent electrostatic image on said photoconductive member, and a transfer belt cooperating with said photoconductive member for receiving said developed image from said photoconductive member and for transferring said developed image to said paper, wherein said photoconductive member comprises a vertically mounted photoconductive belt, and wherein said transfer belt is horizontally mounted above said photoconductive member.
Claim 34
Dependent Claim
119 words
An electrographic printing apparatus for imprinting information on a sheet of paper or the like, comprising a housing, a source of paper and an output for said paper after it is imprinted, a paper path along which said paper travels within said printing apparatus, a photoconductive member for storing a latent electrostatic image of information to be imprinted, developer means for developing said latent electrostatic image on said photoconductive member, and a transfer belt cooperating with said photoconductive member for receiving said developed image from said photoconductive member and for transferring said developed image to said paper, wherein said photoconductive member comprises a vertically mounted photoconductive belt, and wherein said transfer belt is horizontally mounted above said photoconductive member.
Claim 35
Dependent Claim
39 words
The electrographic printing apparatus of claim 30 wherein said transfer belt comes into contact with said paper from below in a transfer zone located in said paper path to transfer said developed image to the underside of said paper.
Claim 36
Dependent Claim
130 words
An electrographic printing apparatus for imprinting information on a sheet of paper or the like, comprising a housing, a source of paper and an output for said paper after it is imprinted, a paper path along which said paper travels within said printing apparatus, a photoconductive member for storing a latent electrostatic image of information to be imprinted, developer means for developing said latent electrostatic image on said photoconductive member, and a transfer belt cooperating with said photoconductive member for receiving said developed image from said photoconductive member and for transferring said developed image to said paper, wherein said transfer belt comes into contact with said paper from above in a transfer zone located in said paper path to transfer said developed image to the top side of said paper.
Claim 37
Dependent Claim
130 words
An electrographic printing apparatus for imprinting information on a sheet of paper or the like, comprising a housing, a source of paper and an output for said paper after it is imprinted, a paper path along which said paper travels within said printing apparatus, a photoconductive member for storing a latent electrostatic image of information to be imprinted, developer means for developing said latent electrostatic image on said photoconductive member, and a transfer belt cooperating with said photoconductive member for receiving said developed image from said photoconductive member and for transferring said developed image to said paper, wherein said transfer belt comes into contact with said paper from above in a transfer zone located in said paper path to transfer said developed image to the top side of said paper.
References Cited (Backward Citations)
US3661452A
Cited
US3838919A
Cited
US3900003A
Cited
GB1492896A
Cited
US4088403A
Cited
US4194832A
Cited
GB2040226A
Cited
US4341455A
Cited
DE3128402A1
Cited
US4515460A
Cited
DE3214677A1
Cited
US4563077A
Cited
US4541709A
Cited
US4563076A
Cited
US4616920A
Cited
EP0171114A1
Cited
DE3541230A1
Cited
US4657369A
Cited
US4652115A
Cited
US4690539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |