Patent ID: 7814860

Claim:
An adhesive-spreading unit, comprising: a plurality of rollers ( 12 , 18 , 20 ), a first roller ( 12 ) being in contact with a tank ( 16 ) of adhesive, a second rubber-clad roller ( 18 ) having a perimeter of rubber claddings ( 19 ) and configured to rotate faster than the first roller ( 12 ), and a third roller ( 20 ) in sliding contact with a film ( 21 ) on which an adhesive is to be deposited and configured to rotate faster than the rubber-clad roller ( 18 ); a tank ( 16 ) configured to contain adhesive; a single actuator unit ( 23 , 24 , 30 , 31 ); a mobile structure ( 28 ) mounted to machine abutments of the adhesive-spreading unit; a pair of abutments ( 29 ) mounted on the mobile structure ( 28 ), the rubber-clad roller ( 18 ) mounted on the pair of abutments ( 29 ), the pair of abutments ( 29 ) configured to move in a first direction in relation to the mobile structure ( 28 ), and the mobile structure ( 28 ) being configured to move along a second direction in relation to the machine abutments, the single actuator unit ( 23 , 24 , 30 , 31 ) configured to control movements of the mobile structure ( 28 ) and the pair of abutments ( 29 ) in order to distance the rollers from one another in a first mode and bring the rollers into contact in a second mode; and stop means ( 27 ) fitted to the single actuator unit ( 23 , 24 , 30 , 31 ) configured to limit a slide of the mobile structure ( 28 ) along the second direction, wherein the single actuator unit ( 23 , 24 , 30 , 31 ) is configured to act on the pair of abutments ( 29 ) in an inclined direction in relation to the first and second directions so that, during a first stage of travel of the of the single actuator unit ( 23 , 24 , 30 , 31 ), the rubber-clad roller ( 18 ) is brought into contact with the first roller ( 12 ) for taking up the adhesive from the tank ( 16 ), and during a second part of the travel of the single actuator unit ( 23 , 24 , 30 , 31 ), the first roller and the rubber-clad roller ( 12 , 18 ) move until the rubber-clad roller ( 18 ) contacts the third roller ( 20 ) to transfer the adhesive to and from the film ( 21 ).