US3589606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic spray coating apparatus
Assignee: Gillette Co LLC
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Filing: 1968-12-23
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Granted: 1971-06-29
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Expires: 1988-12-23
Abstract
Abstract Apparatus for applying a shave facilitating coating to razor blades includes a chamber for holding the coating material and an aspirator for aspirating the coating material to form a mist of fine particles within the chamber. The chamber has a relatively large outlet port so that the mist of particles issue through the outlet port at a low velocity. The particles are then accelerated in an electrostatic field and are deposited on the sharpened edges of the razor blades in a uniform film having a thickness in the order of 2000 A. or less.
Inventors
- 👤 Frank Hamilton Fish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:05
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
47 words
The apparatus as claimed in claim 1 wherein said mist generator includes aspirator structure mounted in an elongated vertically disposed tubular structure for discharging a mist of particles downwardly through said tubular structure for impingement on the surface of the supply material dispensed in said supply chamber.
Claim 2
Dependent Claim
23 words
The apparatus as claimed in claim 1 wherein said high voltage power supply provides a voltage gradient of about 5000 volts per centimeter.
Claim 3
Dependent Claim
32 words
The apparatus as claimed in claim 1 wherein the angular difference between the length of said outlet port and the length of the surface to be coated is less than arc-tan 0.1.
Claim 4
Dependent Claim
31 words
The apparatus as claimed in claim 4 wherein said passageway is inclined at an angle of at least about 10* and said passageway is of oval configuration at its outlet end.
Claim 5
Dependent Claim
249 words
Apparatus for electrostatically spray coating an article comprising a chamber for holding spray coating material in liquid form, an aspirating device for aspirating said coating material to form a mist of particles within said chamber, said chamber having an outlet port of sufficient size so that particles of coating material of a size less than 10 microns will be issued through said outlet at low velocity, said particles providing on deposition a spot size not greater than in the order of 40 microns in diameter, the angular difference between the length of said outlet port and the length of the surface to be coated being less than arc-tan 0.1, an elongated passageway attached to said output port, said passageway having a cross-sectional area greater than 1 square centimeter and including an extension of organic material whose upper portion is of smaller width than its lower portion, said extension having an outlet surface defining a plane parallel to the surface to be coated, said passageway being inclined at an angle of at least about 10* and said passageway being of oval configuration at its outlet end; and a high voltage power supply connected to said mist generator for providing an electrostatic field having an average gradient in the range of 4000-8000 volts per centimeter extending between said mist generator and the article to be coated electrostatically to effect deposition on the article of a substantial portion of the mist particles with which portion would not otherwise have been deposited thereon.
Claim 6
Dependent Claim
47 words
The apparatus as claimed in claim 6 wherein said mist generator includes aspirator structure mounted in an elongated vertically disposed tubular structure for discharging a mist of particles downwardly through said tubular structure for impingement on the surface of the supply material dispensed in said supply chamber.
Claim 7
Dependent Claim
23 words
The apparatus as claimed in claim 7 wherein said high voltage power supply provides a voltage gradient of about 5000 volts per centimeter.
References Cited (Backward Citations)
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US3498541A
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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 |