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US 3,938,924 AGranted
Thermoplastic melt apparatus
AssigneeCelanese Corporation
InventorsRichard M. Abella, Keith D. Dodson, Jerry G. Richardson
Life of this patent
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Abstract
An apparatus for the continuous filtration and flow of molten thermoplastic polymer from a melt source to a shaping apparatus. The apparatus is characterized by the employment of a melt reservoir whose level is regulated by a level control means. Melt flow to the shaping apparatus is regulated by the level control means which controls the flow rate from the melt source as a function of the level in the melt reservoir.
Claims16
An assembly for the continuous filtration and transport of a thermoplastic melt from a melt source to a shaping apparatus comprising:
- a melt source providing a continuous flow of a thermoplastic melt;
- a diverting means disposed downstream of said melt source providing communication for said melt between said melt source and at least two parallel disposed conduits;
- at least two parallel disposed conduits, each provided with a removeable filter means, wherein said thermoplastic melt stream is filtered;
- a melt reservoir in communication with the downstream end of each of said parallel conduits, said reservoir providing a pool for storage of a fixed volume of said filtered thermoplastic melt;
- a level controlling means, in control communication with said melt reservoir and said melt source said level controlling means regulating the melt output of said melt source as a function of the level in said melt reservoir to insure a uniform melt flow to said melt reservoir;
- a positive displacement pumping means in communication with the outlet of said reservoir, said pumping means providing the motive force to provide a uniform rate of flow of said melt to a shaping apparatus;
- and
- said shaping apparatus in communication with the discharge out of said positive displacement pumping means, for shaping said thermoplastic melt, which flows into said shaping apparatus at a uniform rate, into a shaped article.
5 more elements
Dependencies are inferred from the claim text.