Patent US3589283A successfully refreshed from Google Patents.
US3589283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multicolor electrostatic printing system
Assignee: Electrostatic Printing Corp of America
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Filing: 1969-02-19
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Granted: 1971-06-29
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Expires: 1989-02-19
Abstract
Abstract In an electrostatic printing system of the type wherein electroscopic powder is applied to one side of an image screen whereby it can pass through apertures arranged in the shape of an image and is carried in the shape of that image by an electric field established between the screen and a receiving substrate, there is provided an improved arrangement whereby the image can be printed in different colors on the substrate with a single exposure to the image screen.
Inventors
- 👤 Clyde O Childress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:57
CPC Classifications
B; B41; B41M; B41M1/00; B41M1/12; B41M1/125; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
237 words
A system for electrostatically printing a multicolor image on an image receiving object using a single exposure comprising: an image aperture screen having openings therein in the shape of a desired multicolor image, means for establishing an electric field between said screen and said image-receiving object, an electroscopic powder particle container associated with each color to be printed, each said electroscopic powder particle container having walls defining an opening adjacent to and at least as large as the particular portion of the image which is to be colored by the colored electroscopic powder particles within said container, the walls of each said container contacting said screen, said walls comprising a metal material having one end terminating spaced from said screen, and a plastic material attached to said walls and extending to said screen, a resilient means for supporting from one end the walls of said containers to resiliently contact said screen with said plastic material, electroscopic powder particles in each said container bearing the color of the portion of the image to be printed, said powder having a particle size smaller than the apertures of said image screen to freely pass therethrough, and means for moving the electroscopic powder particles in each of said containers through the apertures of said screen into the electric field between said screen and image-receiving object to be carried by said field in the form of said image onto said image-receiving object.
Claim 2
Independent Claim
237 words
A system for electrostatically printing a multicolor image on an image receiving object using a single exposure comprising: an image aperture screen having openings therein in the shape of a desired multicolor image, means for establishing an electric field between said screen and said image-receiving object, an electroscopic powder particle container associated with each color to be printed, each said electroscopic powder particle container having walls defining an opening adjacent to and at least as large as the particular portion of the image which is to be colored by the colored electroscopic powder particles within said container, the walls of each said container contacting said screen, said walls comprising a metal material having one end terminating spaced from said screen, and a plastic material attached to said walls and extending to said screen, a resilient means for supporting from one end the walls of said containers to resiliently contact said screen with said plastic material, electroscopic powder particles in each said container bearing the color of the portion of the image to be printed, said powder having a particle size smaller than the apertures of said image screen to freely pass therethrough, and means for moving the electroscopic powder particles in each of said containers through the apertures of said screen into the electric field between said screen and image-receiving object to be carried by said field in the form of said image onto said image-receiving object.
Claim 3
Dependent Claim
42 words
A system as recited in claim 1 wherein the walls of each electroscopic powder particle container are shaped in accordance with the shape of the particular portion of the image which is to be colored by the colored ink in said container.
Claim 4
Dependent Claim
83 words
Apparatus as recited in claim 1 wherein said means for moving said electroscopic powder particles in each container through the image apertures of said screen includes a plurality of magnetic particles which aRe larger than the openings of said image screen, which are mixed with the electroscopic powder particles in each container, and magnetic means for establishing an electric field which attracts said magnetic particles toward said image screen thereby pushing the powder particles between them and the screen through the image apertures.
Claim 5
Dependent Claim
34 words
Apparatus as recited in claim 1 wherein said resilient means for supporting said walls of said containers comprises a layer of foam material and there is a rigid layer for supporting said foam material.
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |