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US 4,399,948 AGranted
Pulverizer
OwnerPeter Treffner, Charles Treffnerinventors
Life of this patent
Estimating the term…
Abstract
Plastics foam scrap is drawn by an air stream through a three-stage disintegrating apparatus. Each stage includes a plurality of moving interdigitating pins and the pin spacing and a passage dimension of each stage decreases from stage to stage thereby reducing the material to its component beads.
Claims22
Apparatus for disintegrating scrap plastics foam material into its composite beads comprising:
- a double sided granulator rotor having a plurality of breaker pins projecting from each side thereof;
- a housing around said rotor having two sets of stationary pins projecting therefrom, one set interdigitating with the pins on one side of the rotor and the other set interdigitating with the pins on the other side thereof;
- said housing having an exit for the scrap plastics pieces along at least part of the periphery of the housing, radially outward from the axis of rotation;
- at least one of the inner walls of the housing being at an angle to the rotational plane of the rotor so as to present an exit path of decreasing cross-sectional area in the direction of the exit, the rotor extending radially outwardly into the peripheral exit, dividing it into two portions and the housing comprising two axially spaced apart portions with means to move said portions toward and away from each other so as to vary the width of said peripheral exit.
1 more element
Apparatus for disintegrating scrap plastics foam material into its composite beads comprising:
- an elongated housing having a pair of parallel shafts mounted for rotation therein and means for driving the shafts in opposite directions of rotation;
- a plurality of pins projecting radially outwardly from each shaft and interdigitating with each other;
- a plurality of pins projecting from at least one interior wall of said housing and interdigitating with the pins of at least one of said shafts;
- a granulator axially spaced from said pair of shafts and comprising
- a two sided rotor mounted for rotation with a housing, said rotor having a plurality of breaker pins extending from each side and adjacent the outer periphery thereof in a direction generally parallel to the axis of rotation of said rotor;
- said housing having two sets of stationary pins projecting therefrom, one set interdigitating with the pins on one side of the rotor and the other set interdigitating with the pins on the other side thereof.
3 more elements
Dependencies are inferred from the claim text.