Method and device for dosing powdered materials
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United States of America Patent
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-
Jul 3, 2001
Grant Date -
N/A
app pub date -
Jan 19, 1999
filing date -
Jan 21, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method is provided for dosing powdered material from a supply container having a vertically suspending discharge tube of an elastically deformable material, by squeezing said discharge tube at locations, which periodically move along a part of the discharge tube length. In this method, the squeezing of the discharge tube is effected in a similar way as the flexible tube of a peristaltic pump of the type, with which the tube engages a support wall on one side and with which a peristaltic mechanism is provided on the opposite side for squeezing the tube according to a travelling wave, the length of which does not exceed one single wave length.
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