US3918401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for powder coating metal articles
Assignee: Primerica Inc
•
Filing: 1974-04-17
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Granted: 1975-11-11
•
Expires: 1994-04-17
Abstract
Abstract A method and apparatus for powdercoating surfaces of articles selectively whereby coating is obtained only on the desired surfaces while leaving other surfaces uncoated are provided. The invention is particularly adapted for the coating of container ends with powdered materials by applying the material selectively thereto and permitting recovery of the excessive material which is recovered and recycled to the system.
Inventors
- 👤 Harry Nelson Blakeslee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:24
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/14; B05B7/1481; B05B7/1486; B05B14/00; B05B14/10; B05B14/30; B05B5/00; B05B5/08; Y; Y02; Y02P; Y02P70/00; Y02P70/10
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
11 words
means for supplying new powdered material for admixture with withdrawn material;
Claim 2
Dependent Claim
11 words
means for supplying new powdered material for admixture with withdrawn material;
Claim 3
Dependent Claim
16 words
means for injecting air and conveying powder particles in an air stream to a spray chamber;
Claim 4
Dependent Claim
16 words
means for injecting air and conveying powder particles in an air stream to a spray chamber;
Claim 5
Independent Claim
24 words
An apparatus for selectively powder coating areas of an article which comprises, in combInation: A. a spray device comprising a spray chamber and having
Claim 6
Independent Claim
24 words
An apparatus for selectively powder coating areas of an article which comprises, in combInation: A. a spray device comprising a spray chamber and having
Claim 7
Dependent Claim
88 words
An apparatus as claimed in claim 1 additionally comprising: a vacuum manifold connected to said spray chamber and to said mask chamber through a first low pressure air passage and a second higher pressure air passage, respectively, for withdrawing air and excess powdered material; a supply chamber connected to said spray device and said vacuum manifold comprising means for feeding powdered material to said spray device; and a blower creating an air current which exhausts air from said spray device, mask chamber, vacuum manifold and powder supply chamber.
Claim 8
Dependent Claim
52 words
means for spraying the charged particles upon an article to be coated positioned outside an orifice of said spray chamber; and B. a mask chamber comprising an air current disposed between the orifice of the spray chamber and the article for shielding predetermined areas of said article from contact with said particles.
Claim 9
Dependent Claim
52 words
means for spraying the charged particles upon an article to be coated positioned outside an orifice of said spray chamber; and B. a mask chamber comprising an air current disposed between the orifice of the spray chamber and the article for shielding predetermined areas of said article from contact with said particles.
Claim 10
Dependent Claim
6 words
means for reconditioning said powdered material
Claim 11
Dependent Claim
6 words
means for reconditioning said powdered material
Claim 12
Dependent Claim
35 words
means for feeding reconditioned powdered material to said spray device and E. a blower creating an air current which exhausts air from each of said spray chamber, mask chamber, vacuum manifold and powder supply chamber.
Claim 13
Dependent Claim
35 words
means for feeding reconditioned powdered material to said spray device and E. a blower creating an air current which exhausts air from each of said spray chamber, mask chamber, vacuum manifold and powder supply chamber.
Claim 14
Dependent Claim
19 words
An apparatus as claimed in claim 1 wherein said spray device also comprises means for electrically charging said particles.
Claim 15
Dependent Claim
24 words
An apparatus as claimed in claim 1 wherein said spray device also comprises means for directing the flow of the particles upon said article.
Claim 16
Dependent Claim
14 words
An apparatus as claimed in claim 4 wherein said means is a diffusion cone.
Claim 17
Dependent Claim
20 words
An apparatus as claimed in claim 2 wherein said power supply chamber also comprises means for supplying new powdered material.
Claim 18
Dependent Claim
23 words
An apparatus as claimed in claim 2 wherein said powdered material withdrawn by said vacuum manifold is conveyed to said powder supply chamber.
Claim 19
Dependent Claim
21 words
An apparatus as claimed in claim 6 in which said powder supply chamber also comprises means for reconditioning said withdrawn material.
Claim 20
Independent Claim
178 words
An apparatus for electrostatically and selectively coating ends of a metal container which comprises, in combination: A. a spray device comprising a spray chamber and having means for electrically charging and spraying particles of powder upon the end of a container positioned at the orifice of said chamber; B. a mask chamber having an air current disposed between the orifice and the container which shields the sidewalls of the container from contact with said particles; C. a vacuum manifold connected to said spray chamber through a low pressure vacuum port and to said mask chamber through a high pressure vacuum port for withdrawing air and excess powdered material; D. a powder supply chamber connected to said spray device and said vacuum manifold comprising 1. means for supplying new powdered material for admixture with withdrawn material; 2. means for reconditioning said powdered material 3. means for feeding reconditioned powdered material to said spray device and E. a blower creating an air current which exhausts air from each of said spray chamber, mask chamber, vacuum manifold and powder supply chamber.
Claim 21
Independent Claim
178 words
An apparatus for electrostatically and selectively coating ends of a metal container which comprises, in combination: A. a spray device comprising a spray chamber and having means for electrically charging and spraying particles of powder upon the end of a container positioned at the orifice of said chamber; B. a mask chamber having an air current disposed between the orifice and the container which shields the sidewalls of the container from contact with said particles; C. a vacuum manifold connected to said spray chamber through a low pressure vacuum port and to said mask chamber through a high pressure vacuum port for withdrawing air and excess powdered material; D. a powder supply chamber connected to said spray device and said vacuum manifold comprising 1. means for supplying new powdered material for admixture with withdrawn material; 2. means for reconditioning said powdered material 3. means for feeding reconditioned powdered material to said spray device and E. a blower creating an air current which exhausts air from each of said spray chamber, mask chamber, vacuum manifold and powder supply chamber.
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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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |