Patent ID: 8047195

Claim:
A sawing machine with a plurality of wire tools for cutting material in blocks, comprising a guide pulley composed of a plurality of wheels of the same diameter, coaxial and juxtaposed side by side in a wheel pack on a corresponding shaft wherein said wheel pack of the guide pulley (P 2 ) comprises a plurality of wheels (P 21 ) each presenting at least an external circumferential groove (P 21 ′) and a plurality of wheels (P 22 ) each presenting a plurality of external circumferential grooves (P 22 ′) alternated in a repetitive sequence, all of said wheels (P 21 , P 22 ) comprise a radially internal part (P 21 . 1 , P 22 . 1 ), at which they are mutually juxtaposed in the wheel pack, each wheel (P 21 ) presenting at least a groove (P 21 ′) comprises a radially external part (P 21 . 2 ) having an external annular rim (P 21 . 3 ) of lesser width than the thickness of said internal part (P 21 . 1 ) thereof, while each wheel (P 22 ) presenting a plurality of grooves (P 22 ′) comprises a radially external part (P 22 . 2 ) having an external annular rim (P 22 . 3 ) of a width greater than the thickness of said internal part (P 22 . 1 ) thereof, and which overlaps, laterally, partially and in a freely revolving manner, the radially internal part (P 21 . 1 ) of each wheel (P 21 ) adjacent and presenting at least a groove (P 21 ′), and lateral edges or sides (P 21 . 4 , P 22 . 4 ) of all said wheels (P 21 , P 22 ) present at least the same thickness as the thickness of each internal annular ridge (P 22 . 5 ) between adjacent grooves (P 22 ′) in a wheel (P 22 ) with a plurality of grooves, so as to ensure lasting and correct guiding against divergence and/or lateral slipping of the cutting wires (F) which run in the grooves (P 21 ′, P 22 ′) contiguous to the lateral edges or sides of the wheels (P 21 , P 22 ).