Patent ID: 6053104
Filing Date: 2000-04-25
Classification: B41F

Abstract:
A printing machine comprising:a printing cylinder receiving printing substrates for printing;a cleaning device for removing dust particles from the printing substrates transferred to said printing cylinder;said cleaning device comprising a slofted nozzle having a slot opening;a vacuum source connected to said slotted nozzle;said cleaning device further comprising a compressed air conduit extending perpendicular to a direction of movement of the printing substrates;said compressed air conduit arranged centrally in said slot opening and extending in a longitudinal direction of said slot opening such that on opposite sides of said compressed air conduit two slots are formed in said longitudinal direction;said compressed air conduit having compressed air outlets directing an air flow onto the printing substrates, wherein unobstructed air flow is provided between said air outlets and said two slots such that a turbulent air layer results that removes the dust particles from a surface of the printing substrates and the dust particles are sucked into said slotted nozzle by the vacuum created by said vacuum source;said compressed air outlets having a diameter of 24 mm; andsaid slotted nozzle having a width of 15 to 25 mm.