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US 2009/0289552 A1Published application
Ultraviolet lamp system with cooling air filter
AssigneeNordson Corporation
InventorsJames M. Borsuk, Edward C. McGhee
Life of this patent
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Abstract
A microwave-excited ultraviolet lamp system includes a microwave chamber cooled with air drawn through the chamber by a negative pressure source. A filter provided at an inlet of the lamp system prevents particulate material from entering the microwave chamber.
Claims5
A microwave-excited ultraviolet lamp system, comprising:
- a housing;
- a microwave chamber within said housing;
- an inlet in fluid communication with said microwave chamber;
- an outlet in fluid communication with said microwave chamber;
- a pressure source only proximate said outlet, said pressure source drawing cooling air into said microwave chamber through said inlet and exhausting cooling air through said outlet;
- and
- a filter coupled to said inlet for filtering cooling air drawn through said inlet.
4 more elements
A microwave-excited ultraviolet lamp system, comprising:
- a lamp head having an inlet for admitting cooling air, said lamp head terminating in a lamp face through which ultraviolet light and cooling air are emitted during ultraviolet radiation of a substrate by said lamp head;
- an enclosed exhaust duct supported by said lamp head, said exhaust duct in fluid communication with said lamp face and having an air inlet port that receives the cooling air emitted through said lamp face, and having an outlet port that directs cooling air within said exhaust duct so as not to contact the substrate;
- a filter operatively coupled to said lamp head inlet;
- and
- a pressure source operatively coupled only to said exhaust duct outlet port, said pressure source drawing cooling air through said filter, through said lamp head inlet, and into said exhaust duct.
2 more elements
A method of operating an ultraviolet lamp system, comprising:
- emitting ultraviolet radiation from a lamp head;
- drawing cooling air into the lamp head using only negative pressure;
- and
- filtering the cooling air as it enters the lamp head under the action of the negative pressure.
1 more element
Dependencies are inferred from the claim text.