Abstract A rubber reclaiming apparatus includes two circular, coaxial discs in a housing. One disc is stationary and has a central feed opening and a circular row of spaced teeth about the opening. The other disc is driven and carries a central impeller opposite the feed opening and a circular row of spaced teeth closely juxtaposed to the teeth of the stationary disc in a radially inward direction in a common radial plane. Respective annular working face portions of the two discs extending from the teeth in an outward direction are conical and approach each other axially toward the disc peripheries. The annular, outermost portions of the working faces are radial, parallel to each other and smooth. Circumferentially spaced radial grooves extend in each of the conical face portions and gradually decrease in depth toward the radial face portions. A coaxial screw conveyor feeds pretreated rubber scrap to the supply opening of the stationary disc, and the tubular shaft of the screw supplies steam. The material circumferentially discharged from the discs is collected.
each working face having a second annular portion, extending radially outward from said first portion, said second annular portions being radial, flat, and parallel to each other;
Claim 2
Dependent Claim
41 words
In an apparatus as set forth in claim 1, said feeding means including a screw conveyor having a hollow shaft, and means for supplying steam to said feed opening through said hollow shaft, the shaft being substantially coaxial with said discs.
Claim 3
Dependent Claim
35 words
In an apparatus as set forth in claim 1, said grooves merging smoothly into said second annular portions closely adjacent said first annular portions respectively, the respective remainders of said second annular portions being smooth.
Claim 4
Dependent Claim
21 words
said first annular portions being formed with respective circumferentially spaced, radial grooves decreasing in depth in a radially outward direction; and
Claim 5
Dependent Claim
55 words
said first portions defining therebetween a gap radially substantially continuous from said teeth to said second annular portions and continuously tapering in a radially outward direction; e. feeding means for feeding a material to said feed opening; and f. rotating means for rotating one of said discs about said axis relative to the other discs.