Claims
- 1. A method of coating an article which has at least one flat surface, said method comprising:
- (a) positioning the article on a foraminous first conveyor which has an upper substantially horizontal surface so that the flat surface of said article rests on said upper surface,
- (b) spraying the article with uncured coating particles while the article is being conveyed on said conveyor to cover exposed surfaces of said article with said particles,
- (c) positioning said article so that said flat surface rests on the upper surface of a second conveyor in which said upper surface is a wiping surface,
- (d) retaining said article so that said upper wiping surface move relative to said article and removes all uncured coating particles from the flat surface of said article,
- (e) curing the coating particles on said article to form a coating on all surfaces of said article except for said flat surface,
- (f) positioning said article on a foraminous conveyor which has an upper substantially horizontal surface of said conveyor with the flat surface of said article out of contact with said upper surface,
- (g) spraying the article with said uncured coating particles so that said flat surface is completely covered with said particles, and
- (h) curing the uncured coating particles on said flat surface so that said article is coated completely.
- 2. A method of coating an article as recited in claim 1, wherein said article is made of a paramagnetic material and said article is retained by a magnet beneath the second conveyor.
- 3. A method of coating an article as recited in claim 1, wherein said article is retained temporarily relative to said upper wiping surface and conveyed from said second conveyor to a third conveyor which conveys said article through a curing zone.
- 4. A method of coating an article as recited in claim 3, wherein said article is made of a paramagnetic material and said article is retained by a magnet which is positioned beneath said second conveyor.
- 5. A method of coating an article as recited in claim 4, wherein said magnet is an electromagnet which is selectively energized.
- 6. A method of coating an article which has an upper flat surface and an opposite lower flat surface, said method comprising:
- (a) positioning the article on a foraminous conveyor which has upper substantially horizontal surface so that the lower flat surface of said article rests on said upper surface,
- (b) spraying the article with uncured coating particles while the article is being conveyed on said conveyor to cover exposed surfaces of said article with said particles,
- (c) positioning said article so that said lower flat surface rests on the upper surface of a second conveyor in which the upper surface of the second conveyor is a wiping surface,
- (d) retaining said article so that said upper wiping surface moves relative to said article and removes all uncured coating particles from the lower flat surface of said article,
- (e) curing the coating particles on said article to form a coating on all surfaces of said article except for said lower surface,
- (f) positioning said article on a foraminous conveyor which has an upper substantially horizontal surface so that the upper flat surface of the article rests on the upper surface of said conveyor,
- (f) spraying the article with said uncured coating particles so that said lower flat surface is completely covered with said particles, and
- (g) curing the uncured coating particles on said lower surface so that said article is coated completely.
Parent Case Info
This is a divisional of copending application Ser. No. 07/839,498 filed on Feb. 20, 1992 now U.S. Pat. No. 5,264,037, which is a continuation-in-part of Int'l Application No. PCT/US91/01406 which designates the U.S. filed Feb. 28, 1991 which is a continuation of Ser. No. 07/486,513, filed Feb. 28, 1990 now U.S. Pat. No. 5,000,985.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4836137 |
Heine et al. |
Jun 1989 |
|
5000985 |
Salisbury |
Mar 1991 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
839498 |
Feb 1992 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
486513 |
Feb 1990 |
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