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US 3,970,288 AGranted
Metering device and mixing apparatus
OwnerFrank Brooksinventor
Life of this patent
Estimating the term…
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OwnerFrank Brooksinventor
Estimating the term…
The invention relates in the first instance to apparatus for dispensing granular material, for example plastics granules dosed with a coloring agent. Granular material and the coloring agent are located in supply hoppers and metering means feed predetermined metered quantities to a mixing device which supplies the dosed material to a supply hopper. The apparatus is arranged to operate when the level of dosed material in the supply hopper falls below a predetermined level, whereupon actuation of the metering means causes automatic replenishment to that level. In a second embodiment of the invention there is provided a shroud, such that the materials are discharged within the shroud to contact a mixer blade and then fed to the injection molding machine. The invention also contemplates a metering device including a cylinder with an opening in its wall to communicate with a measuring chamber located within the body of the cylinder. A rod passing through the back wall of the measuring chamber is connected to a head within the chamber. One end of the rod is contacted by a crank arm within the cylinder such that rotation of the cylinder causes movement of the rod head axially within the measuring chamber.
Apparatus for delivering to a receiver a mixture in predetermined proportions of particulate materials, comprising:
A metering device for use in connection with apparatus for delivering to a receiver a mixture of predetermined portions of particulate materials, said metering device being located below a hopper, the metering device comprising a rotary hollow cylinder defined by a wall thickness, a measuring chamber formed in said cylinder and opening outwardly thereof to receive material from said hopper, means extending from said chamber into the interior of said cylinder and terminating in a first head, spring means normally biasing said rod means outwardly of said chamber and into said cylinder, a raceway, first means coacting with said raceway for urging said rod means against the bias of said spring a predetermined distance into said chamber as said cylinder rotates, whereby said rod means urges the contents of said cylinder outwardly thereof to eject said material from said chamber, and adjustable means coacting with said first means to establish the predetermined distance that said rod means moves into said chamber as said cylinder rotates, said adjustable means comprising a pivotable arm having a head mounted on one end thereof, said head riding on said raceway and screw means for adjusting the orientation of said arm.
Dependencies are inferred from the claim text.