Importance

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Abstract

A reservoir sight glass assembly forming part of a material transfer system for loading lightweight granular plastic material into injection molding machines and the like is connected to the associated machine and to a light weight pressure relief chamber attached to the reservoir sight glass assembly, both connections being by quick disconnect devices. The reservoir sight glass assembly includes a sensor adjustably positioned against the sight glass which responds to the level of material in the reservoir sight glass assembly and a magnet assembly which traps ferrous contaminants and prevents their entering the machine. The flow of material to the pressure relief chamber is controlled by the sensor which turns a regulated source of compressed air on or off depending upon the sensed level of material in the reservoir sight glass assembly. The magnetic assembly includes a pivotable mounting for a pair of magnets which, in one position, create a magnetic field across the reservoir sight glass assembly and in another position, employed when the reservoir sight glass assembly is removed from the associated machine, to effectively remove the magnetic field permitting any trapped ferrous contaminants to drop out of the reservoir sight glass assembly.

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First Claim