2004094641 A1 abstract a method and apparatus for breaking down pieces of material into smaller pieces and for separating out different substances making up the material one of the substances being a fibrous textile and another being metal comprising the steps of subjecting the pieces to a series of dismemberments to produce progressively smaller pieces falling within a predetermined size range separating the smaller pieces into a plurality of fractions each fraction including pieces within a predetermined size range and subjecting each fraction to a flow of air calibrated to cause separation of the fibrous textile material from the pieces application_number US 6577602 A description reference will initially be made to fig1 showing in plan view the ambient grinding subsystem used to physically reduce whole car and truck tires or portions thereof into 4 20 mesh size pieces and to remove most of the fiber and metal from the rubber prior to cryogenic grinding the word u201c tire u201d will be used to denote both complete tires and tire pieces the pieces may be the tire tread or the sidewalls or simply chunks of tire including both tread and sidewall there can be slight differences between the processing of tire treads as opposed to sidewalls particularly as treads incorporate relatively little fiber but these processing differences are relatively minor and the process is largely the same regardless of the feed stock the tires not shown are initially loaded onto a conveyor 1 that transports them in the direction of arrow a into a shredder 4 the shredder for example a reduction tech shredder model ms 5040 includes an internal screen that passes chips up to two inches in size onto conveyor 6 which can be 36 inches in width chips larger.