Self-cleaning gravimetric and volumetric dosing apparatuses
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United States of America Patent
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Jul 23, 2024
Grant Date -
Jul 7, 2022
app pub date -
Aug 5, 2020
filing date -
Aug 6, 2019
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Abstract
A self-cleaning dosing apparatus includes a material hopper for containing pellets of material, a feed screw, a first material outlet through which pellets of material fall by gravity onto a first end of the feed screw for the feeding of pellets to a process machine. A second material outlet is located beneath the first end of the feed screw, with a slide gate blocking the second material outlet. A pneumatic piston is provided for pulling the slide gate to unblock the second material outlet, and a Venturi pump is located under the second material outlet for pulling pellets through the second material outlet when the slide gate is opened.
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