Device for the controlled admission of a noxious powder into a box
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United States of America Patent
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Apr 22, 2003
Grant Date -
N/A
app pub date -
Sep 14, 2000
filing date -
Sep 14, 1999
priority date (Note) -
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Abstract
A device for the controlled admission of a noxious powder into a box which includes a body having an open lower part that terminates in a sealing skirt. The body is connected to a powder inlet pipe and to a gas extraction pipe. A movable valve is disposed in the body. The valve is controlled by a magnetic device, and cooperates with the sealing skirt. A housing is fixed on the lower part of the body. The housing is open in its central part to allow the passage of the box therethrough and comprises a retractable device which ensures grip and transfer of the lid of the box. The device also includes means for detecting the quantity of powder in the box, and at least one ventilation circuit ensuring, at the level of the circumference of the opening of said housing and/or at the level of the sealing skirt, evacuation towards a treatment unit of that part of the powder which might be located at those levels.
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