US3570456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid development apparatus for development of electrostatic images
Assignee: Varian Medical Systems Inc
•
Filing: 1969-02-11
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Granted: 1971-03-16
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Expires: 1989-02-11
Abstract
Abstract An inclined fine mesh screen of conductive material, in combination with a reservoir or liquid medium having toner therein, supports a body bearing an electrostatic latent image to be developed. Means dispense the toner charged liquid across the upper portion of the inclined screen.
Inventors
- 👤 Guy A Marlor
- 👤 John A Dahlquist
- 👤 Eugene F Cirimele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:36
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
89 words
Developing apparatus for toning electrostatic images on a dielectric medium, the combination comprising: a frame means; a generally planar fine mesh screen of conductive material mounted on the frame means in an inclined position and adapted to transport liquid toner to the image bearing surface of the dielectric medium as the toner progresses down the inclined screen; and a toner supply means adapted to supply the fine mesh screen with toner at the upper end thereof for replenishing the charged particles removed during the toning of the electrostatic images.
Claim 2
Dependent Claim
89 words
Developing apparatus for toning electrostatic images on a dielectric medium, the combination comprising: a frame means; a generally planar fine mesh screen of conductive material mounted on the frame means in an inclined position and adapted to transport liquid toner to the image bearing surface of the dielectric medium as the toner progresses down the inclined screen; and a toner supply means adapted to supply the fine mesh screen with toner at the upper end thereof for replenishing the charged particles removed during the toning of the electrostatic images.
Claim 3
Dependent Claim
85 words
Developing apparatus according to claim 1 wherein the toner supply means comprises: a reservoir in fluid communication with the lower end of the inclined screen for containing the toner after progressing down the inclined screen; apertured tubular means disposed across the upper end of the inclined screen for providing a distribution of the toner across the surface of the inclined screen; and means in liquid communication with the reservoir and the apertured tubular means for transporting toner from the reservoir to the apertured tubular means.
Claim 4
Dependent Claim
31 words
Developing apparatus according to claim 2 wherein the majority of toner distributed by said apertured tubular means to said incline screen floods and flows on the underside of said incline screen.
Claim 5
Dependent Claim
21 words
Developing apparatus according to claim 2 wherein said fine mesh screen is of a density of from 40 to 60 mesh/in.
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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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |