Patent ID: 8210077

Claim:
Device ( 1 ) for cutting labels in a labelling machine, comprising: a cutting roller ( 2 ) having at least one blade ( 3 ) co-operating with a fixed counter-blade ( 4 ) able to be operatively associated to the roller for cutting the labels; a mechanical shaft ( 5 ) whereon is keyed said cutting roller ( 2 ); a frame ( 6 ) to support said mechanical shaft ( 5 ); a heat exchanger circuit containing an operating fluid, a first portion ( 9 a ) of said circuit being constructed on said support frame ( 6 ), said exchanger circuit thermally interacting with said frame ( 6 ); means for generating a flow of said operating fluid within the heat exchanger circuit, characterized in that said means for generating a flow of said operating fluid are connected to the mechanical shaft ( 5 ) and are operatively inserted in said heat exchanger circuit; said means for generating a flow of said operating fluid comprising an impeller ( 10 ) connected to the mechanical shaft ( 5 ), the heat exchanger circuit being a closed circuit through a plurality of passageways so that the operating fluid, during operation, is recirculated through said closed circuit, wherein the closed circuit passageways pass through a first bearing, then longitudinally through the mechanical shaft, then through a second bearing, then back through said frame to said first bearing again, to thereby regulate the temperature of the cutting roller, bearings and frame.