US3670701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two step orbital pad development
Assignee: Xerox Corp
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Filing: 1969-07-03
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Granted: 1972-06-20
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Expires: 1989-07-03
Abstract
Abstract A method and apparatus for developing a latent electrostatic image with electroscopic material wherein development is effected by utilizing a biased toner cloud generator for conveying developer to the image bearing surface and an oscillating pad mounted adjacent to the surface to enhance the development of the image. A cloud of toner is generated by oscillating a container supporting developer to release charged toner therefrom and the cloud thereupon contacts the image bearing surface. By then orbiting a brush member on the surface, toner affixed to the nonimage background areas is redistributed to the image to produce a high quality developed image.
Inventors
- 👤 Ernest A Weiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:30
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0803; G03G15/0822; G03G15/0877; G03G15/0887; G03G15/0891
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
110 words
An apparatus for developing a support surface bearing a latent electrostatic charge pattern selectively retained thereon in image configuration and residual electrostatic charge in nonimage configuration comprising, a powder cloud generator positioned adjacent the support surface to bring charged developer into contact with the charged pattern in image configuration and the residual charge in nonimage configuration said powder cloud generator comprising an oscillatable substantially closed container supporting a developer composition comprising carrier material bearing toner, and developer agitating means supporting adjacent said developer conveying means in operative relationship with the support surface to redistribute developer adhering to the non-image configuration residual charge To the electrostatic charge pattern in image configuration.
Claim 2
Independent Claim
110 words
An apparatus for developing a support surface bearing a latent electrostatic charge pattern selectively retained thereon in image configuration and residual electrostatic charge in nonimage configuration comprising, a powder cloud generator positioned adjacent the support surface to bring charged developer into contact with the charged pattern in image configuration and the residual charge in nonimage configuration said powder cloud generator comprising an oscillatable substantially closed container supporting a developer composition comprising carrier material bearing toner, and developer agitating means supporting adjacent said developer conveying means in operative relationship with the support surface to redistribute developer adhering to the non-image configuration residual charge To the electrostatic charge pattern in image configuration.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1 wherein said closed container includes a screen means to allow charged toner to pass therefrom to the image bearing surface without carrier material.
Claim 4
Dependent Claim
26 words
The apparatus of claim 2 further comprising a toner dispenser mounted above said oscillatable container to supply toner to the carrier material supported in the container.
Claim 5
Dependent Claim
21 words
The apparatus of claim 3 wherein said dispenser includes means to selectively control the amount of toner supplied to said container.
Claim 6
Dependent Claim
36 words
The apparatus of claim 1 wherein said container includes a series of open compartments at the bottom thereof surrounding the developer wherein oscillation of said container causes agitation of the carrier to release charged toner therefrom.
Claim 7
Dependent Claim
27 words
The apparatus of claim 1 wherein said container is coupled to an electrical potential to further place an electrostatic charge on toner released from the carrier material.
Claim 8
Independent Claim
95 words
An apparatus for developing a support surface including a latent electrostatic charge pattern selectively retained thereon in image configuration and residual electrostatic charge in non-image configuration comprising developer conveying means positioned adjacent the support surface to bring charged developer into contact therewith to adhere to the charge pattern in image configuration and to the residual charge in non-image configuration, developer agitating means adapted to be oscillated in operative contact with the support surface to redistribute developer adhering to the residual charge in non-image configuration to the electrostatic charge pattern in image configuration for development thereof.
Claim 9
Independent Claim
95 words
An apparatus for developing a support surface including a latent electrostatic charge pattern selectively retained thereon in image configuration and residual electrostatic charge in non-image configuration comprising developer conveying means positioned adjacent the support surface to bring charged developer into contact therewith to adhere to the charge pattern in image configuration and to the residual charge in non-image configuration, developer agitating means adapted to be oscillated in operative contact with the support surface to redistribute developer adhering to the residual charge in non-image configuration to the electrostatic charge pattern in image configuration for development thereof.
Claim 10
Dependent Claim
15 words
The apparatus of claim 7 wherein the developer agitating means is an oscillating brush member.
Claim 11
Dependent Claim
18 words
The apparatus of claim 8 wherein the brush member conforms to the shape of the image bearing surface.
Claim 12
Dependent Claim
27 words
The device of claim 8 wherein the brush member is attached to a pad movably supported on rod means and including oscillating means to move said pad.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |