US4076404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for electronic color photography and photosensitive member used for the same
Assignee: Canon Inc
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Filing: 1974-04-22
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Granted: 1978-02-28
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Expires: 1994-04-22
Abstract
Abstract The photosensitive member consists basically of a supporting base, a photoconductive layer and an insulating layer dyed in a desired color for providing a color filter effect. Such photosensitive members having different color filter effects are provided for polychromatic reproduction on a single transferrable material.
Inventors
- 👤 Katsumi Nagamatsu
- 👤 Takashi Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:57
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/12; G03G15/00; G03G15/01; G03G15/0142; G03G15/0147; G03G15/0152; G03G15/0163
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
178 words
An electronic photocopying apparatus comprising: photosensitive members mounted in juxtaposed relationship on a movable carrier and corresponding in number to resolved colors, each of said photosensitive members being formed of a supporting member, a photoconductive layer and a transparent insulating layer providing a color filter effect; means for driving said movable carrier; means for forming an electrostatic latent image on the surface of each of said insulating layers forming the uppermost layer of said photosensitive members juxtaposed on said movable carrier; developing means for visualizing said electrostatic latent images disposed in juxtaposed relationship with said electrostatic latent image forming means and corresponding in number to the resolved colors, said developing means using different toners complementary to the colors of the color filters provided by said insulating layers; and means for transferring said visualized images onto an image transfer member in superposed relationship by causing said image transfer member to effect a cycle of movement with respect to the movement of said photosensitive members for sequentially engaging each said photosensitive member over the total length of each said member.
Claim 2
Dependent Claim
178 words
An electronic photocopying apparatus comprising: photosensitive members mounted in juxtaposed relationship on a movable carrier and corresponding in number to resolved colors, each of said photosensitive members being formed of a supporting member, a photoconductive layer and a transparent insulating layer providing a color filter effect; means for driving said movable carrier; means for forming an electrostatic latent image on the surface of each of said insulating layers forming the uppermost layer of said photosensitive members juxtaposed on said movable carrier; developing means for visualizing said electrostatic latent images disposed in juxtaposed relationship with said electrostatic latent image forming means and corresponding in number to the resolved colors, said developing means using different toners complementary to the colors of the color filters provided by said insulating layers; and means for transferring said visualized images onto an image transfer member in superposed relationship by causing said image transfer member to effect a cycle of movement with respect to the movement of said photosensitive members for sequentially engaging each said photosensitive member over the total length of each said member.
Claim 3
Dependent Claim
67 words
An electronic photocopying apparatus as defined in claim 1, wherein said electrostatic latent image forming means includes: means for subjecting the surface of said insulating layer on each of said photosensitive members to primary electric charging; and means for subjecting the surface of said insulating layer to electric charging of a polarity opposite said primary electric charging and contemporaneously therewith projecting original image upon said photoconductive layer.
Claim 4
Dependent Claim
61 words
An electronic photocopying apparatus as defined in claim 1, wherein said electrostatic latent image forming means includes: means for subjecting the surface of said insulating layer on each of said photosensitive members to primary electric charging; and means for subjecting the surface of said insulating layer to a.c. corona discharge and contemporaneously therewith projecting an original image upon said photoconductive layer.
Claim 5
Dependent Claim
84 words
An electronic photocopying apparatus as defined in claim 1, wherein said electrostatic latent image forming means includes: means for subjecting the surface of said insulating layer on each of said photosensitive members to primary electric charging; means for subjecting the surface of said insulating layer to electric charging or a polarity opposite said primary electric charging and contemporaneously therewith projecting an original image upon said photoconductive layer; and means for uniformly illuminating said photoconductive layer of each of said photosensitive members with radiant rays.
Claim 6
Dependent Claim
77 words
An electronic photocopying apparatus as defined in claim 1, wherein said electrostatic latent image forming means includes: means for subjecting the surface of said insulating layer on each of said photosensitive members to primary electric charging; means for subjecting the surface of said insulating layer to a.c. corona discharge and contemporaneously therewith projecting an original image upon said photoconductive layer; and means for uniformly illuminating said photoconductive layer of each of said photosensitive members with radiant rays.
Claim 7
Dependent Claim
170 words
An electronic photocopying apparatus comprising: a drum-like photosensitive member consisting of a supporting substrate, a photoconductive layer and insulating layers corresponding in number to resolved colors, each of said insulating layers providing a different color filter effect corresponding to one of the colors to be resolved; means for forming an electrostatic latent image on the surface of each of said insulating layers disposed peripherally of said photosensitive member; developing means for visualizing said electrostatic latent images disposed peripherally of said photosensitive member and in juxtaposed relationship with said electrostatic latent image forming means, said developing means corresponding in number to the resolved colors and using different toners complementary to the colors of the color filters provided by said insulating layers; and means for transferring said visualized images onto an image transfer member in superposed relationship by causing said image transfer member to make one rotation with respect to the advancing movement thereby of the total length of each of said insulating layers forming the uppermost layer of said photosensitive member.
Claim 8
Dependent Claim
170 words
An electronic photocopying apparatus comprising: a drum-like photosensitive member consisting of a supporting substrate, a photoconductive layer and insulating layers corresponding in number to resolved colors, each of said insulating layers providing a different color filter effect corresponding to one of the colors to be resolved; means for forming an electrostatic latent image on the surface of each of said insulating layers disposed peripherally of said photosensitive member; developing means for visualizing said electrostatic latent images disposed peripherally of said photosensitive member and in juxtaposed relationship with said electrostatic latent image forming means, said developing means corresponding in number to the resolved colors and using different toners complementary to the colors of the color filters provided by said insulating layers; and means for transferring said visualized images onto an image transfer member in superposed relationship by causing said image transfer member to make one rotation with respect to the advancing movement thereby of the total length of each of said insulating layers forming the uppermost layer of said photosensitive member.
Claim 9
Dependent Claim
66 words
An electronic photocopying apparatus as defined in claim 6, wherein said electrostatic latent image forming means includes: means for subjecting the surface of each of said insulating layers to primary electric charging; and means for subjecting the surface of each of said insulating layers to electric charging of a polarity opposite said primary electric charging and contemporaneously therewith projecting an original image upon said photoconductive layer.
Claim 10
Dependent Claim
59 words
An electronic photocopying apparatus as defined in claim 6, wherein said electrostatic latent image forming means includes: means for subjecting the surface of each of said insulating layers to primary electric charging; and means for subjecting the surface of each of said insulating layers to a.c. corona discharge and contemporaneously therewith projecting an original image upon said photoconductive layer.
Claim 11
Dependent Claim
77 words
An electronic photocopying apparatus as defined in claim 6, wherein said electrostatic latent image forming means includes: means for subjecting the surface of each of said insulating layers to primary electric charging; means for subjecting the surface of each of said insulating layers to electric charging of a polarity opposite said primary electric charging and contemporaneously therewith projecting an original image upon said photoconductive layer; and means for uniformly illuminating the entire surface of the photoconductive layer.
Claim 12
Dependent Claim
70 words
An electronic photocopying apparatus as defined in claim 6, wherein said electrostatic latent image forming means includes: means for subjecting the surface of each of said insulating layers to primary electric charging; means for subjecting the surface of each of said insulating layers to a.c. corona discharge and contemporaneously therewith projecting an original image upon said photoconductive layer; and means for uniformly illuminating the entire surface of the photoconductive layer.
References Cited (Backward Citations)
US3724943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |