US4114261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacture of a xerographic microfield donor
Assignee: Xerox Corp
•
Filing: 1976-05-24
•
Granted: 1978-09-19
•
Expires: 1996-05-24
Abstract
Abstract Microfield donors used in a xerographic process and the methods for manufacturing them. The donor is provided with means for establishing a plurality of electrostatic microfields on the donor surface to attract and hold toner particles so they can be transported to a developing station. The polarity of the established microfields are continuously reversed to alternately repel and attract toner particles to the donor surface during their transportation in order to agitate the toner particles to prevent agglomeration of the particles from forming and to effect nullification of the microfield attracting the particles adjacent a photoconductor to form a high density image free of background deposits in uncharged area of the photoconductive surface.
Inventors
- 👤 Ernest A. H. Weiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:04
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G15/0818; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
48 words
The method of manufacture of a xerographic microfield donor for toner transportation comprising the steps of forming an electrically conductive toner support member, establishing a plurality of pairs of adjacent electrical microfields on the surface of said support member, and continuously reversing the direction of the established microfields.
Claim 2
Independent Claim
48 words
The method of manufacture of a xerographic microfield donor for toner transportation comprising the steps of forming an electrically conductive toner support member, establishing a plurality of pairs of adjacent electrical microfields on the surface of said support member, and continuously reversing the direction of the established microfields.
Claim 3
Dependent Claim
56 words
The method in accordance with claim 1 wherein said support member is formed by providing a plurality of electrically conductive elements having a dielectric coating on one surface thereof, separating said electrically conductive element by disposing dielectric material between each of said elements, and fusing said dielectric material to the dielectric coating on said conductive elements.
Claim 4
Dependent Claim
28 words
The method in accordance with claim 1 wherein said support member is formed by providing a conductive cylindrical drum and wrapping exposed conductive filaments on the drum surface.
Claim 5
Dependent Claim
22 words
The method in accordance with claim 3 wherein said exposed conductive filaments are wrapped parallel to the longitudinal axis of said drum.
Claim 6
Dependent Claim
22 words
The method in accordance with claim 3 wherein said exposed conductive filaments are wrapped substantially radially about the surface of said drum.
Claim 7
Dependent Claim
15 words
The method in accordance with claim 2 wherein said electrically conductive elements are lamellar segments.
Claim 8
Dependent Claim
13 words
The method in accordance with claim 6 wherein said lamellar segments are rings.
Claim 9
Dependent Claim
17 words
The method in accordance with claim 6 wherein said electrically conductive elements are axially extending lamellar segments.
Claim 10
Dependent Claim
19 words
The method in accordance with claim 4 wherein said exposed conductive filaments are bent to form peaks and valleys.
Claim 11
Dependent Claim
67 words
The method in accordance with claim 1 wherein said support member is formed by providing a sheet of conductive foil coated with a dielectric on one side thereof, folding said foil into a series of pleats with the dielectric coating on adjacent pleats facing each other, fusing said facing dielectric coating on adjacent pleats to rigidify said structure, and cutting away opposite edges of said fused pleats.
Claim 12
Dependent Claim
70 words
The method in accordance with claim 1 wherein said support member is formed by providing a sheet of dielectric foil, printing a grid of conductive material on said foil, folding said foil into a series of pleats with the printed conductive material on adjacent pleats facing each other, fusing the dielectric interfaces on said adjacent pleats with the conductive material therebetween, and cutting away opposite edges of said fused pleats.
References Cited (Backward Citations)
US3147679A
Cited
US3288602A
Cited
US3759222A
Cited
US3860436A
Cited
US3993021A
Cited
US4006981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |