US4777106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic toning
Assignee: DENNSION MANUFACTURING COMPANY A NEVADA CORP
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Filing: 1987-02-24
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Granted: 1988-10-11
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Expires: 2007-02-24
Abstract
Abstract An electrostatic toning system employed in applying toner to latent electrostatic images on the surface of a dielectric material. Toning is accomplished by fluidizing the toner in a gaseous stream, charging the toner in the fluidized bed, and conveying the charged toner to the dielectric surface by means of a toner receptive member in contact with the fluidized toner.
Inventors
- 👤 Richard A. Fotland
- 👤 Leo A. Beaudet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:00
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G15/0808; G03G15/0822; G03G15/0887; Y; Y10; Y10S; Y10S118/00; Y10S118/05
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
76 words
A method of applying toner to a member comprising: storing toner particles; producing a fluidized bed of the stored toner by using a gaseous stream; charging the fluidized toner particles; and transferring the charged particles to a dielectric member by immersing a toner receptive material in the fluidized bed; coating said receptive material with charged particles from said fluidized toner; and conveying charged particles on said receptive material onto electrostatically defined images on the dielectric member.
Claim 2
Independent Claim
76 words
A method of applying toner to a member comprising: storing toner particles; producing a fluidized bed of the stored toner by using a gaseous stream; charging the fluidized toner particles; and transferring the charged particles to a dielectric member by immersing a toner receptive material in the fluidized bed; coating said receptive material with charged particles from said fluidized toner; and conveying charged particles on said receptive material onto electrostatically defined images on the dielectric member.
Claim 3
Dependent Claim
21 words
A method as defined in claim 1 wherein said storing step is followed by the further step of vibrating the toner.
Claim 4
Independent Claim
76 words
A method of applying toner to a member comprising: storing toner particles; fluidizing the stored toner by using a gaseous stream; charging the fluidized toner particles; and transferring the charged particles to a dielectric member by forming a cloud of charged toner paticles in contact with a toner receptive materially; coating said receptive material with charged particles from said cloud; and conveying charged particles on said receptive material onto electrostatically defined images on the dielectric member.
Claim 5
Independent Claim
76 words
A method of applying toner to a member comprising: storing toner particles; fluidizing the stored toner by using a gaseous stream; charging the fluidized toner particles; and transferring the charged particles to a dielectric member by forming a cloud of charged toner paticles in contact with a toner receptive materially; coating said receptive material with charged particles from said cloud; and conveying charged particles on said receptive material onto electrostatically defined images on the dielectric member.
Claim 6
Dependent Claim
90 words
An electrostatic toning method comprising: means for storing toner particles; means for fluidizing the toner particles; means for charging the toner particles; and means for conveying the charged toner particles to a dielectric member; wherein said fluidizing of the toner particles promotes the transfer of the particles to said dielectric member; wherein said conveying means comprises a toner receptive material that is coated by the charged toner particles; and means for delivering the charged toner particles on the surface of the receptive material onto electrostatic images on the dielectric member.
Claim 7
Dependent Claim
90 words
An electrostatic toning method comprising: means for storing toner particles; means for fluidizing the toner particles; means for charging the toner particles; and means for conveying the charged toner particles to a dielectric member; wherein said fluidizing of the toner particles promotes the transfer of the particles to said dielectric member; wherein said conveying means comprises a toner receptive material that is coated by the charged toner particles; and means for delivering the charged toner particles on the surface of the receptive material onto electrostatic images on the dielectric member.
Claim 8
Dependent Claim
17 words
An electrostatic toning apparatus as defined in claim 4 wherein said charging means comprises a corona discharge.
Claim 9
Dependent Claim
17 words
An electrostatic toning apparatus as defined in claim 4 wherein said fluidizing means comprises a gaseous stream.
Claim 10
Dependent Claim
16 words
An electrostatic toning apparatus as defined in claim 4 wherein said toner particles have reduced magnetism.
Claim 11
Dependent Claim
16 words
An electrostatic toning apparatus as defined in claim 4 wherein said toner particles have reduced conductivity.
References Cited (Backward Citations)
US4088093A
Cited
US4124287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |