US3618858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drop charging bar
Assignee: Eastman Kodak Co
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Filing: 1970-05-25
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Granted: 1971-11-09
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Expires: 1990-05-25
Abstract
Abstract A charging element for a noncontacting coating system is formed as a bar with a series of transversely extending notches with each notch having a coating of an electrically conductive material applied thereto and connected to a control unit for selectively energizing said coatings to thereby discriminately impart electrical charges to coating material passing through the notches in the bar. With this construction not only is fabrication of the bar facilitated, but startup problems are eliminated since the charging bar may be moved into position after the flow of coating material through the coating apparatus has begun.
Inventors
- 👤 Fred E Culp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:23
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/07; B41J2/075; B41J2/08; B41J2/085
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
161 words
In noncontacting coating apparatus including an orifice plate having a series of regularly formed orifices therethrough, means for supplying coating material under pressure to said orifices, and means positioned downstream of said orifice plate for establishing an electrostatic field through which drops of coating material from said orifices pass, the improvement comprising: a. an elongated bar extending substantially coextensively with said orifice plate, b. means defining a series of open-sided notches in said bar, c. each of said notches projecting inwardly from a longitudinal edge of said bar and transversely thereof, d. said notches being positioned with respect to said orifices in a manner such that drops of printing material projected from said orifices pass through said notches, e. discrete coatings of electrically conductive material adhered to the surfaces of each of said notches, and f. means for selectively energizing each of said coatings to discriminately impart an electrostatic charge to drops of printing material passing through each of said notches.
Claim 2
Dependent Claim
161 words
In noncontacting coating apparatus including an orifice plate having a series of regularly formed orifices therethrough, means for supplying coating material under pressure to said orifices, and means positioned downstream of said orifice plate for establishing an electrostatic field through which drops of coating material from said orifices pass, the improvement comprising: a. an elongated bar extending substantially coextensively with said orifice plate, b. means defining a series of open-sided notches in said bar, c. each of said notches projecting inwardly from a longitudinal edge of said bar and transversely thereof, d. said notches being positioned with respect to said orifices in a manner such that drops of printing material projected from said orifices pass through said notches, e. discrete coatings of electrically conductive material adhered to the surfaces of each of said notches, and f. means for selectively energizing each of said coatings to discriminately impart an electrostatic charge to drops of printing material passing through each of said notches.
Claim 3
Dependent Claim
12 words
The apparatus of claim 1 wherein: a. said slots are substantially U-shaped
Claim 4
Dependent Claim
15 words
The apparatus of claim 1 wherein: a. said bar is movable in directions transverse thereof.
Claim 5
Dependent Claim
18 words
The apparatus of claim 1 further comprising: a. means defining a detent in opposite ends of said bar.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |