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US 6,000,238 AGranted
Carbon dioxide snow blanketing device
AssigneeThe BOC Group, Inc.
InventorJulian Hollingshead
Life of this patent
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Abstract
Apparatus and method for delivering solid carbon dioxide flakes to a substrate in which a housing is provided with at least one passageway having operatively connected thereto a solid carbon dioxide generator. The tubes are heated to an extent sufficient to substantially prevent the solid carbon dioxide flakes from adhering to the walls of the tubes so as to maintain continuous operation and to provide a uniform flow of solid carbon dioxide flakes to the substrate.
Claims17
A device for delivering solid carbon dioxide to a substrate comprising:
- a) a housing having at least one passageway, each passageway defined by at least one wall, said at least one passageway having a first end operatively connected to a solid carbon dioxide generating means and an opposed second end in proximity to said substrate;
- and
- b) heating means comprising means for raising the temperature of said passageway to an extent sufficient to substantially prevent the solid carbon dioxide from adhering to the at least one wall as the solid carbon dioxide passes through the at least one passageway toward the substrate.
Dependencies are inferred from the claim text.