Leesona Corporation

Roy W Gerstenberg

Gomer E Kropa

William Barnes

Roland A LeJeune

Thomas M Oakes

A device for feeding sheet material into a granulator and particularly scrap plastic sheet material of the type wherein a plurality of such sheets are normally twisted together to form a composite rope which is fed between opposed feed rolls and subsequently into a granulation chamber. The present feed device includes a pair of cooperating rolls, each of which is provided with a plurality of longitudinally spaced, radially inwardly extending grooves. The grooves of each roll are adapted to mesh or interdigitate with a resultantly formed ridge on the opposing roll such that the sheet material fed therebetween is forced into a sinuous cross sectional configuration and subjected to differing roll surface velocities. Both of the above-described conditions imparted to the sheet material are believed to contribute to trouble free positive feeding especially when feeding individual, i.e. single sheet material thicknesses.

Feed roll device for sheet granulator

A novel cooperative blade construction for the rotor and bed knives of a size reduction machine such as a granulator and the like wherein each of the blades are of an overall chevron configuration so as to form a generally trapezoidal opening therebetween. As the blades progressively move past each other, the height of the trapezoidal opening is reduced such that articles to be granulated are initially contacted at opposed laterally spaced points on opposite sides thereof such that articles are clamped and progressively cut with a minimum of energy consumption, noise and fines production. The generally centrally located peaks of the rotor blades and the bed knife blades are also arcuately displaced away from a radial plane passing through the opposite side portions. The blades progressively move past each other while maintaining an equal cutting gap therebetween.

Granulator blade construction

This invention relates to size reduction apparatus and particularly to a novel feed device thereof and method of feeding sheet material thereto. A first baffle is adapted to extend into the cutting chamber simultaneously towards the cutting rotor and a downstroke wall portion from which a bed knife is adapted to extend into cutting contact with knife means mounted on the rotor. Such construction, in effect, enables the simultaneous formation of a variable width sheet feed opening to the granulator as well as means for restraining a portion of already granulated material on the upstroke side of the rotor from contacting the sheet material as it is fed between the rotor and bed knife. A secondary baffle may in turn be disposed in contact with the first baffle so as to close a secondary or housing opening disposed between the first baffle and a pair of upwardly spaced feed rolls.

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Norfolk, MA, United States of America

Roy W Gerstenberg