Patent ID: 7963222
Filing Date: 2011-06-21
Classification: B41F

Abstract:
1. A flexographic printing machine, comprising: a printing drum rotatably mounted on a framing comprising two side frames and adapted to support a web of material to be printed; at least one printing unit comprising an ink roller and a plate-holding roller adjacent to said printing drum; on at least one of said side frames a first sliding support on which the ink roller is mounted and a second sliding support on which the plate-holding roller is mounted; at least one linear guide member supported on the side frame for guiding movements of said first and second sliding supports in directions parallel to an imaginary line (L) which perpendicularly intersects the axes of the ink and plate-holding rollers; and actuating means configured and arranged for moving the first and second sliding supports between rest positions, in which sleeves can be axially inserted or removed from the ink and plate-holding rollers respectively, and work positions in which the plate-holding roller ( said actuating means comprising: second upper and lower worm screws arranged parallel to said imaginary line (L) above and below the axes of the ink and plate-holding rollers, respectively, respective second nuts joined to the second sliding support and coupled to said second upper and lower worm screws, and second actuating means for actuating the second upper and lower worm screws in unison.