US3910231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing device for a polychromatic electrophotographic copier
Assignee: Canon Inc
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Filing: 1974-02-19
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Granted: 1975-10-07
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Expires: 1994-02-19
Abstract
Abstract A developing device which can obtain a blend free polychromatic development in the same position. The device successively makes an electrostatic latent image visible using polychromatic developer and comprises developer supply means, developer holding means having an endless holding member, and developer recoverying means, whereby developer once used may be recovered for reuse.
Inventors
- 👤 Shozo Inoue
- 👤 Tadashi Sato
- 👤 Tateki Nagaoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:06
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/01; G03G15/0105; G03G15/0121; G03G15/06; G03G15/10; G03G15/104
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
99 words
A polychromatic developing device, using a plurality of different color developers for successively developing electrostatic latent images on an image carrier, comprising: developer supply means for successively supplying different color developers to the image carrier; developer holding means including a rotatable endless belt for holding and moving said supplied developer away from said image carrier; and developer collecting means including a collecting blade for contacting said endless belt to remove said supplied developer therefrom, and planar support means disposed on the side of said belt opposed to said collecting blade for maintaining contact between said blade and said belt.
Claim 2
Dependent Claim
99 words
A polychromatic developing device, using a plurality of different color developers for successively developing electrostatic latent images on an image carrier, comprising: developer supply means for successively supplying different color developers to the image carrier; developer holding means including a rotatable endless belt for holding and moving said supplied developer away from said image carrier; and developer collecting means including a collecting blade for contacting said endless belt to remove said supplied developer therefrom, and planar support means disposed on the side of said belt opposed to said collecting blade for maintaining contact between said blade and said belt.
Claim 3
Dependent Claim
147 words
A polychromatic developing device, using a plurality of different color developers for successively developing electrostatic latent images on an image carrier, comprising: developer supply means including a supply inlet for successively supplying charged different color developers to the image carrier; developer holding means including a conductive guiding member for guiding said developer from said supply inlet into contact with said image carrier, and a rotatable conductive holding member having an endless surfAce for holding and moving said supplied developer away from said image carrier; means for applying a first voltage to said conductive guiding member, and means for applying a second voltage to said conductive holding member, wherein said first and second voltages are of opposite polarities, and said first voltage has the same polarity as said charge on said developers; and developer collecting means for separately collecting said different color developers held on said holding member.
Claim 4
Dependent Claim
147 words
A polychromatic developing device, using a plurality of different color developers for successively developing electrostatic latent images on an image carrier, comprising: developer supply means including a supply inlet for successively supplying charged different color developers to the image carrier; developer holding means including a conductive guiding member for guiding said developer from said supply inlet into contact with said image carrier, and a rotatable conductive holding member having an endless surfAce for holding and moving said supplied developer away from said image carrier; means for applying a first voltage to said conductive guiding member, and means for applying a second voltage to said conductive holding member, wherein said first and second voltages are of opposite polarities, and said first voltage has the same polarity as said charge on said developers; and developer collecting means for separately collecting said different color developers held on said holding member.
Claim 5
Dependent Claim
104 words
A polychromatic developing device, using a plurality of different color developers for successively developing electrostatic latent images on a movable image carrier, comprising: developer supply means for successively supplying different color developers to the image carrier; developer holding means including a conductive rotatable endless belt for holding and moving said supplied developer away from said image carrier; developer regulating means including a conductive roller disposed adjacent said endless belt and said image carrier at a position downstream of said belt in the direction of movement of said image carrier; and developer collecting means for separately collecting said different color developers held on said belt.
Claim 6
Dependent Claim
104 words
A polychromatic developing device, using a plurality of different color developers for successively developing electrostatic latent images on a movable image carrier, comprising: developer supply means for successively supplying different color developers to the image carrier; developer holding means including a conductive rotatable endless belt for holding and moving said supplied developer away from said image carrier; developer regulating means including a conductive roller disposed adjacent said endless belt and said image carrier at a position downstream of said belt in the direction of movement of said image carrier; and developer collecting means for separately collecting said different color developers held on said belt.
Claim 7
Dependent Claim
103 words
A polychromatic developing device, using a plurality of different color developers for successively developing electrostatic latent images on a movable image carrier, comprising: developer supply means for successively supplying different color developers to the image carrier; developer holding means including a conductive rotatable endless member for holding and moving said supplied developer away from said image carrier; developer regulating means including an electrically biased member disposed adjacent said holding member at a position downstream of said holding member in the direction of movement of said image carrier; and developer collecting means for separately collecting said different color developers held on said holding member.
Claim 8
Dependent Claim
103 words
A polychromatic developing device, using a plurality of different color developers for successively developing electrostatic latent images on a movable image carrier, comprising: developer supply means for successively supplying different color developers to the image carrier; developer holding means including a conductive rotatable endless member for holding and moving said supplied developer away from said image carrier; developer regulating means including an electrically biased member disposed adjacent said holding member at a position downstream of said holding member in the direction of movement of said image carrier; and developer collecting means for separately collecting said different color developers held on said holding member.
Claim 9
Dependent Claim
23 words
A polychromatic developing device as set forth in claim 4, wherein said electrically biased member comprises a conductive roller facing said image carrier.
Claim 10
Dependent Claim
103 words
A polychromatic developing device, using a plurality of different color developers for successively developing electrostatic latent images on an image carrier, comprising: developer supply means including a supply inlet for successively supplying different color developers to the image carrier; developer holding means including a guiding member for guiding said developer from said supply inlet into contact with said image carrier, and a rotatable holding member having an endless surface for holding and moving said supplied developer away from said image carrier; and developer collecting means including a plurality of collecting units for separately collecting said different color developers held on said holding member.
Claim 11
Dependent Claim
103 words
A polychromatic developing device, using a plurality of different color developers for successively developing electrostatic latent images on an image carrier, comprising: developer supply means including a supply inlet for successively supplying different color developers to the image carrier; developer holding means including a guiding member for guiding said developer from said supply inlet into contact with said image carrier, and a rotatable holding member having an endless surface for holding and moving said supplied developer away from said image carrier; and developer collecting means including a plurality of collecting units for separately collecting said different color developers held on said holding member.
Claim 12
Dependent Claim
39 words
A polychromatic developing device as set forth in claim 6, wherein said guiding member is pivotally mounted for movement to permit residual developer to flow rapidly to said holding member subsequent to the supply of each different color developer.
Claim 13
Dependent Claim
23 words
A polychromatic developing device as set forth in claim 6, further comprising means for applying voltages to said holding member and guiding member.
Claim 14
Dependent Claim
114 words
A polychromatic developing device, using a plurality of different color developers for successively developing electrostatic latent images on an image carrier, comprising: developer supply means for successively supplying different color developers to the image carrier; developer holding means including a rotatable endless member for holding and moving said supplied developer away from said image carrier; and developer collecting means for separately collecting said different color developers held on said holding member, said collecting means including a plurality of movably mounted collecting blades, means for successively moving said blades into cOntact with said endless member to remove developer therefrom, and a plurality of developer receptables for receiving said different color developers removed by said blades.
Claim 15
Dependent Claim
114 words
A polychromatic developing device, using a plurality of different color developers for successively developing electrostatic latent images on an image carrier, comprising: developer supply means for successively supplying different color developers to the image carrier; developer holding means including a rotatable endless member for holding and moving said supplied developer away from said image carrier; and developer collecting means for separately collecting said different color developers held on said holding member, said collecting means including a plurality of movably mounted collecting blades, means for successively moving said blades into cOntact with said endless member to remove developer therefrom, and a plurality of developer receptables for receiving said different color developers removed by said blades.
Claim 16
Dependent Claim
56 words
A polychromatic developing device as set forth in claim 9, wherein said endless member is conductive, and further comprising means for moving said image carrier, and developer regulating means including an electrically biased member disposed adjacent said holding member at a position downstream of said holding member in the direction of movement of said image carrier.
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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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |