US3857362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal powder coating apparatus
Assignee: Individual
•
Filing: 1972-05-23
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Granted: 1974-12-31
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Expires: 1992-05-23
Abstract
Abstract A method of coating metal pipes and strip which comprises moving a heated metal surface to be coated, bringing a plastics coating powder blend into contact with the surface and wiping the powder onto the surface. A light and flexible wiping pressure is applied and cooling air is preferably blown onto a wiping member. The surface to be coated is conveniently orientated approximately uprightly and moved downwardly. In a continuous process powder is continuously supplied to a wiping-on region in measured amount. An apparatus is disclosed for coating metal pipes and strip which comprises a flexible wiping blade which applies a wiping edge against a surface to be coated and forms a wedge shaped trough for powder between the blade and the surface. A conveyor to supply powder to the trough between surface and blade is provided and preferably an adjustable spring acts on the wiping blade to permit adjusting the wiping pressure preliminarily. A machine to move the surface to be coated is necessary and air cooling apparatus is a preferred accessory.
Inventors
- 👤 D Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:30
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D1/00; B05D1/30; B05D3/00; B05D3/02; B05D3/0218; B05D1/40; B05D1/42; B05D2252/00; B05D2252/02; B05D2254/00; B05D2401/00; B05D2401/30; B05D2401/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
138 words
Apparatus for coating a metal article which comprises a flexible acting wiper blade, means adapted to locate a metal surface of said article to be coated adjacent the blade, so that the leading edge of said blade may press lightly against the surface, heating means for the metal surface of said article located adjacent thereto, means adapted to cause a relative wiping movement between the blade and the surface, means adapted to put a thermoplastic flowable powder coating blend onto the surface, the blade being at an acute angle with the surface to be coated in that direction to form a wedge shaped trough for the powder, and means for cooling the blade, the metal surface and the coating, said cooling means located proximate to the locus of connection between the blade, the powder, and the metal surface.
Claim 2
Dependent Claim
138 words
Apparatus for coating a metal article which comprises a flexible acting wiper blade, means adapted to locate a metal surface of said article to be coated adjacent the blade, so that the leading edge of said blade may press lightly against the surface, heating means for the metal surface of said article located adjacent thereto, means adapted to cause a relative wiping movement between the blade and the surface, means adapted to put a thermoplastic flowable powder coating blend onto the surface, the blade being at an acute angle with the surface to be coated in that direction to form a wedge shaped trough for the powder, and means for cooling the blade, the metal surface and the coating, said cooling means located proximate to the locus of connection between the blade, the powder, and the metal surface.
Claim 3
Dependent Claim
26 words
Apparatus as claimed in claim 1, in which the blade is mounted with means adapted to permit adjusting the pressure of the blade against the surface.
Claim 4
Dependent Claim
137 words
Apparatus for coating a surface of metal pipes and strip with a thermoplastic flowable powder coating blend which comprises a flexible wiping blade stationarily mounted adapted to permit adjusting wiping pressure, means adapted to move the surface past the wiping blade, so that the leading edge of the latter may wipe across the surface located at an acute angle with the surface, the direction of the acute angle vertex being in the direction of movement, means adapted to heat the surface located adjacent thereto, and means adapted to put a quantity of the powder onto the surface of the wedge shaped space between blade and surface and means for cooling the blade, the metal surface and the coating, said cooling means located proximate to the locus of connection between the blade, the powder, and the metal surface.
Claim 5
Dependent Claim
137 words
Apparatus for coating a surface of metal pipes and strip with a thermoplastic flowable powder coating blend which comprises a flexible wiping blade stationarily mounted adapted to permit adjusting wiping pressure, means adapted to move the surface past the wiping blade, so that the leading edge of the latter may wipe across the surface located at an acute angle with the surface, the direction of the acute angle vertex being in the direction of movement, means adapted to heat the surface located adjacent thereto, and means adapted to put a quantity of the powder onto the surface of the wedge shaped space between blade and surface and means for cooling the blade, the metal surface and the coating, said cooling means located proximate to the locus of connection between the blade, the powder, and the metal surface.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |