Patent US3611991A successfully refreshed from Google Patents.
US3611991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibrating bed developing apparatus with electromagnetic developer agitator
Assignee: Xerox Corp
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Filing: 1969-09-03
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Granted: 1971-10-12
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Expires: 1989-09-03
Abstract
Abstract Apparatus for developing electrostatic latent images carried by a support medium with a vibrating bed of two-component magnetizable developer material. The development unit includes a housing, containing developer material, positioned adjacent a latent image-bearing support medium and vibrated to convey the developer material into contact with the latent image for effecting the development thereof. A plurality of electromagnets are carried by the inner peripheral surface of the developer housing and sequentially actuated to, in combination with the vibratory movement effect intermixing of the developer material.
Inventors
- 👤 Eugene F Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:31
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/082
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
In an apparatus for developing latent electrical charges selectively retained in image configuration on a support medium by vibrating a developer supporting surface to create a suspended fluidized mass of magnetizable developer material with agitating movement in operative contact with the latent electrical charges, the improvement comprising, mixing means supported by said developer supporting surface actuable to effect movement of the magnetizable developer material in a direction independent of the agitating movement of said developer material.
Claim 2
Dependent Claim
76 words
In an apparatus for developing latent electrical charges selectively retained in image configuration on a support medium by vibrating a developer supporting surface to create a suspended fluidized mass of magnetizable developer material with agitating movement in operative contact with the latent electrical charges, the improvement comprising, mixing means supported by said developer supporting surface actuable to effect movement of the magnetizable developer material in a direction independent of the agitating movement of said developer material.
Claim 3
Dependent Claim
95 words
In an apparatus for developing latent electrostatic charge patterns on a support medium in which a developer reservoir containing a quantity of magnetically attractable developer material in communication with said support medium is vibrated to create a suspended fluidized mass of developer material in operative relation to said support medium, the improvement comprising, electromagnetic means supported by said developer reservoir adapted when actuated to effect an intermixing movement of the suspended fluidized mass of developer material within said reservoir independent from any movement imparted to said developer material by the vibration of said developer reservoir.
Claim 4
Dependent Claim
95 words
In an apparatus for developing latent electrostatic charge patterns on a support medium in which a developer reservoir containing a quantity of magnetically attractable developer material in communication with said support medium is vibrated to create a suspended fluidized mass of developer material in operative relation to said support medium, the improvement comprising, electromagnetic means supported by said developer reservoir adapted when actuated to effect an intermixing movement of the suspended fluidized mass of developer material within said reservoir independent from any movement imparted to said developer material by the vibration of said developer reservoir.
Claim 5
Dependent Claim
92 words
Apparatus for developing latent electrostatic charge patterns on a support medium including, a developing reservoir in communication with said support medium and containing a quantity of magnetically attractable developer material, means for vibrating said developer reservoir to create a suspended fluidized mass of developer material in operative relation to said support medium, and electromagnetic means supported by said developer reservoir adapted when actuated to effect an intermixing movement of the suspended fluidized mass of developer material within said reservoir independent from any movement imparted to said developer material by said vibrating means.
Claim 6
Dependent Claim
92 words
Apparatus for developing latent electrostatic charge patterns on a support medium including, a developing reservoir in communication with said support medium and containing a quantity of magnetically attractable developer material, means for vibrating said developer reservoir to create a suspended fluidized mass of developer material in operative relation to said support medium, and electromagnetic means supported by said developer reservoir adapted when actuated to effect an intermixing movement of the suspended fluidized mass of developer material within said reservoir independent from any movement imparted to said developer material by said vibrating means.
Claim 7
Dependent Claim
139 words
Apparatus for developing latent electrostatic charge patterns on a support medium including; a vibratory developer reservoir in communication with said support medium and containing a quantity of magnetically attractable developer material, means for rapidly vibrating said developer reservoir to create a suspended fluidized mass of developer material in operation relation to said support medium, electromagnetic means supported by said developer reservoir adapted when actuated to effect an intermixing movement of the suspended fluidized mass of developer material within said developer reservoir independent and exclusive of any movement and agitation imparted to said developer material by said vibrating means, and means for periodically actuating said electromagnetic means to effect said intermixing movement of the suspended fluidized mass of developer material while in communication with said support medium and thereby enhance the development of said charge patterns on said support medium.
Claim 8
Dependent Claim
139 words
Apparatus for developing latent electrostatic charge patterns on a support medium including; a vibratory developer reservoir in communication with said support medium and containing a quantity of magnetically attractable developer material, means for rapidly vibrating said developer reservoir to create a suspended fluidized mass of developer material in operation relation to said support medium, electromagnetic means supported by said developer reservoir adapted when actuated to effect an intermixing movement of the suspended fluidized mass of developer material within said developer reservoir independent and exclusive of any movement and agitation imparted to said developer material by said vibrating means, and means for periodically actuating said electromagnetic means to effect said intermixing movement of the suspended fluidized mass of developer material while in communication with said support medium and thereby enhance the development of said charge patterns on said support medium.
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |