VACUUM POWERED RESIN LOADING SYSTEM WITHOUT CENTRAL CONTROL
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United States of America Patent
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Jul 21, 2015
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Feb 20, 2014
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Method and apparatus for pneumatically conveying granular material from a supply thereof through a conduit to a plurality of receivers for temporary storage of the material prior to molding or extrusion thereof by drawing vacuum in the conduit using a vacuum pump and varying the vacuum pump speed in response to sensed vacuum level in the conduit proximate the pump.
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