US3613637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer for electrostatic images
Assignee: Xerox Corp
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Filing: 1969-06-16
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Granted: 1971-10-19
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Expires: 1989-06-16
Abstract
Abstract Apparatus for developing a latent electrostatic charge pattern including a developer bed comprising a supporting plate positionable beneath at least a portion of a surface having the latent electrostatic charge pattern formed thereon. The developer bed is vibrated by a driving member to fluidize the developer material supported thereon for contacting and developing the latent charge pattern. The bed and driving member are suspended by flexors and are coupled together by resilient means to minimize the drive force requirements by permitting operation at mechanical resonance and to isolate the noise and vibrations generated by the vibrating bed and driving member.
Inventors
- 👤 Dinesh S Shah
- 👤 John F Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:27
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/082
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
151 words
Apparatus for developing a latent electrosTatic charge pattern formed on a support member with a two-component developer material comprising carrier particles and an electrostatically attractable powder comprising: support means positioned adjacent to and beneath at least a portion of said support member for supporting a quantity of said developer material on the surface thereof; first flexible means for suspending said support means; second flexible means for suspending a vibratory member; a resilient member for coupling the vibratory member to said support means; a vibratory member for producing vibrations when energized, said vibratory member positioned adjacent said support means and suspended by said second flexible suspending means; and means for energizing said vibratory member, the vibrations produced thereby being coupled to said support means by said resilient member producing fluidization of the developer material in contact with the latent electrostatic charge pattern on said support member, whereby said charge pattern is developed.
Claim 2
Dependent Claim
151 words
Apparatus for developing a latent electrosTatic charge pattern formed on a support member with a two-component developer material comprising carrier particles and an electrostatically attractable powder comprising: support means positioned adjacent to and beneath at least a portion of said support member for supporting a quantity of said developer material on the surface thereof; first flexible means for suspending said support means; second flexible means for suspending a vibratory member; a resilient member for coupling the vibratory member to said support means; a vibratory member for producing vibrations when energized, said vibratory member positioned adjacent said support means and suspended by said second flexible suspending means; and means for energizing said vibratory member, the vibrations produced thereby being coupled to said support means by said resilient member producing fluidization of the developer material in contact with the latent electrostatic charge pattern on said support member, whereby said charge pattern is developed.
Claim 3
Dependent Claim
38 words
The apparatus as defined in claim 1 wherein said vibratory member is operated at the resonant frequency of said developing apparatus thereby minimizing the force required to vibrate said support means to produce fluidization of the developer material.
References Cited (Backward Citations)
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Cited
US2378025A
Cited
US3254625A
Cited
US3357399A
Cited
US3393663A
Cited
US3484265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |