Patent ID: 6739247
Filing Date: 2004-05-25
Classification: B41F

Abstract:
A printing device for rotogravure printing machines comprising:at least one printing cylinder equipped on an external surface thereof with a plurality of notches adapted to contain a printing liquid; at least one rubber roller for each printing cylinder, said rubber roller being adapted to push paper supports against said printing cylinder in order to print onto said paper supports, wherein a central portion of said printing cylinder is flexed away from fixed longitudinal ends of the cylinder when said printing cylinder is subjected to said pushing from the rubber roller; at least one scraper member for each printing cylinder wherein said scraper member is fixed at each longitudinal end, said scraper member being of a doctor type and being adapted to push into contact with said external surface of said printing cylinder in order to remove printing liquid not contained in said notches; wherein said scraper member is equipped with at least one thrusting member placed in a central position with respect to the fixed ends of said scraper member, said thrusting member being adapted to thrust a central portion of said scraper member towards said printing cylinder such that the central portion of said scraper member is flexed away from the fixed ends of said scraper member towards the printing cylinder such that the flexed scraper member follows the flexure of said printing cylinder, and said thrusting member comprised of at least one hydraulic cylinder connected to a support of a blade of said scraper member.