Patent US3678336A successfully refreshed from Google Patents.
US3678336A
Expired / Lapsed
US
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Electrostatic powder striping applicator
Assignee: Continental Can Co Inc
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Filing: 1970-07-10
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Granted: 1972-07-18
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Expires: 1990-07-10
Abstract
Abstract A powder applicator nozzle is set at an acute angle to the direction of travel of the workpiece. The applicator has corona charging pins to impart an electric charge to the powder coming from the nozzle. Powder is jetted from a powder nozzle past the corona charging pins. Air under pressure is used for cleaning the charging pins to avoid powder particles clinging to the pointed tip and destroying its electrical characteristics.
Inventors
- 👤 Robert A Winkless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:24
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/32; B23K9/324; B05; B05B; B05B5/00; B05B5/025; B05B5/03; B05B5/032; B05B5/08; B05B5/12; B23K1/00; B23K1/14; B23K1/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
122 words
An electrostatic powder striping system for coating a can body side seam comprising: means electrically connected to said can body for grounding said can body; a powder dispensing head disposed inside of said can body having: charging pins insulated from said head and extending outward from said head to set up an electrostatic field between said pins and said can body; a fluidized powder conduit having a nozzle for jetting powder out of said nozzle at an acute angle of about 11 degrees to the surface of said can body side seam and in the vicinity of the inside of said can side seam whereby fluidized powder is charged and travels toward said can side seam under the influence of said field.
Claim 2
Dependent Claim
122 words
An electrostatic powder striping system for coating a can body side seam comprising: means electrically connected to said can body for grounding said can body; a powder dispensing head disposed inside of said can body having: charging pins insulated from said head and extending outward from said head to set up an electrostatic field between said pins and said can body; a fluidized powder conduit having a nozzle for jetting powder out of said nozzle at an acute angle of about 11 degrees to the surface of said can body side seam and in the vicinity of the inside of said can side seam whereby fluidized powder is charged and travels toward said can side seam under the influence of said field.
Claim 3
Dependent Claim
27 words
An electrostatic powder striping system as set forth in claim 1 in which: said dispensing head is positioned less than one-fourth inch from said inside can seam.
Claim 4
Dependent Claim
47 words
An electrostatic powder striping system as set forth in claim 1 further comprising: ports surrounding said charging pins and being larger in diameter than said charging pins; and a means for conducting air to said air ports whereby air escapes from said ports and cleans said pins.
Claim 5
Dependent Claim
27 words
An electrostatic powder striping system as set forth in claim 1 in which: said side seam is oriented to be at the lowest position on said can.
Claim 6
Dependent Claim
35 words
An electrostatic powder striping system as set forth in claim 4 in which: said fluidized powder conduit nozzle is positioned so that the jet stream inclines downward and sprays powder adjacent said inside side seam.
Claim 7
Dependent Claim
31 words
An electrostatic powder striping system as set forth in claim 3 further comprising: means directing said escaping air travel in a vertically downward direction traversing the path of said powder particles.
References Cited (Backward Citations)
US3526027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |