An apparatus for treating a relief precursor having a back side and a relief side. The apparatus includes a housing, a treating means for treating the relief precursor with at least one liquid, a removal means for removing debris and/or liquid from the relief precursor, the removal means arranged downstream of the treating means, and a conveying mechanism configured for transporting the relief precursor in a transport direction through the housing. The removal means includes a liquid removal and guidance body mounted for removing liquid from the back side of the relief precursor. The conveying mechanism is configured for pulling the relief precursor over and against said liquid removal and guidance body whilst the relief precursor is moved in the transport direction, such that in operation liquid is removed from the back side.

A conveying unit conveys a medium by moving a glue belt. The conveying unit includes a vapor application unit and a cleaning unit. The vapor application unit applies heated vapor to a front surface of the glue belt separated from the medium. The cleaning unit cleans the front surface to which the vapor is applied by the vapor application unit.

A method for cleaning a printing fluid off a surface of at least one rotatable component of a printing press includes selecting and executing one of a plurality of predefined cleaning operations in an automated way. The selection is made on the basis of a predefined mathematical model executed on a computer and, when the model is executed, a parameter corresponding to an amount of the printing fluid present on the surface is calculated. The improved cleaning method may be applied in all modes of operation of the printing press and in particular allows detergent, cleaning cloth, and/or water to be saved.

A method for operating a printing material processing machine by using a computer includes acquiring print job parameters from print jobs for the printing material processing machine and machine parameters by using the computer, evaluating the acquired parameters to determine the machine state by using the computer, and requesting and providing fluid consumable materials for optimizing the operation of the machine on the basis of the determined machine state by using the computer. Maintenance measures carried out on the machine are optimized on the basis of the determined machine state, by using the computer.

The invention relates to a cleaning apparatus (10) for functionally regenerating a brush (20) which can be used for washing a flexographic plate; in particular, the apparatus is configured to regenerate a brush (20) comprising a cylindrical core (5) about which a channel (4) supporting filaments (3) is fixed according to a spiral shape. The apparatus comprises a frame defining a rotation axis (100) for the brush and a motorized assembly, which can be operatively connected to an end of said cylindrical core (5) of the brush (20) to rotate it about the rotation axis (100). The apparatus (10) further comprises a cleaning unit (30) comprising a carriage (31), movable along a rectilinear guide (32) and a tool (33) provided with an end (33A) adapted to penetrate into the spaces defined between the turns of the spiral to detach the polymer and monomer residues hardened in said spaces as a result of the use of said brush for said washing.

Disclosed is a corrugated paperboard printer comprising a pressing device for applying a pressing force to press a chamber which reserves ink toward an anilox roll. The pressing device is configured to apply a first pressing force, and a second pressing force which is greater than the first pressing force, respectively, to a first pressing area and a second pressing area in a back surface of a chamber frame. In a state in which no pressing force is applied by the pressing device, bending occurring in the chamber frame due to a load transmitted from a printing roll to the chamber frame via the anilox roll as printing is performed to a corrugated paperboard sheet is greater in the second pressing area than in the first pressing area.

There is provided a method of cleaning a print roller and a system for performing the same. The method comprises providing an ultrasonic cleaning bar having at least one ultrasonic energy source. The ultrasonic cleaning bar is engaged with an ink-carrying surface of the print roller, the ultrasonic cleaning bar and the ink-carrying surface defining a trough therebetween for containing a cleaning fluid. A cleaning routine is executed, the cleaning routine comprising: filling the trough with the cleaning fluid so that the cleaning fluid contacts the ink-carrying surface; activating the ultrasonic energy source for a period of time to remove contaminants from the ink-carrying surface of the print roller so that the contaminants become suspended in the cleaning fluid; and draining the suspension of cleaning fluid and contaminants from the trough. The method comprises executing the cleaning routine at least two times in succession before cleaning of the print roller is complete.

Provided is a washing device that has a small device configuration, is excellent in maintainability, and further has a high productivity. The washing device performs development using a washing solution while transporting an imagewise exposed flexographic printing plate precursor. The washing device has a transporting unit that transports the flexographic printing plate precursor along a transport path having a curved transport passage and a linear transport passage, using a leader and a developing portion that performs development by removing an unexposed portion of the flexographic printing plate precursor. The transporting unit transports the flexographic printing plate precursor using a winding transmission method or transports the flexographic printing plate precursor using a method of winding a traction member provided at the leader.

A cleaning device cleans a screen mask. The cleaning device includes a cleaning sheet configured to clean the screen mask; a roll-shaped supply section configured to supply the cleaning sheet; a cleaning head configured to press the cleaning sheet supplied from the supply section against a rear surface of the screen mask; a roll-shaped winding section configured to wind a used cleaning sheet; a driving section configured to drive the winding section; a moving mechanism configured to move the supply section, the cleaning head, and the winding section in the same direction as and in an opposite direction to a supply direction of the cleaning sheet; a lifting and lowering mechanism configured to lift and lower the cleaning head; and a brake mechanism configured to allow rotation of the supply section when the cleaning head is lowered by the lifting and lowering mechanism, and to restrict rotation of the supply section when the cleaning head is lifted by the lifting and lowering mechanism.

A doctor blade system of a printing machine comprises a doctor blade (12), a blade support (14) and a clamping element (16), wherein the doctor blade (12) is arranged at a contact surface (24) on a front side (20) of the blade support (14) and pressed against the contact surface (24) by a pressing area (34) of the clamping element (16). The clamping element (16) has a bearing surface (40) arranged at a backside (27) of the blade support (14).