A decorator press for printing on metal cans has a pump unit, a distribution head, a sensing device and a processing circuit. The pump unit comprises a plurality of inlet ports, a first inlet port configured to receive an ink of a first color from a first ink source and a second inlet port configured to receive an ink of a second color darker than the first color. The distribution head is coupled to the pump unit and configured to spread fluid received from the pump unit across zones of a print roller. The sensing device is coupled to the press and configured to sense a characteristic of fluid flowing out of the distribution head. The processing circuit is configured to receive the sensed characteristic, compare the sensed characteristic to a predetermined threshold, and to provide an indication to a display based on the comparison.

Provided are a blade device equipped with a blade member which can accurately adjust pressing force due to a blade member, and a printing machine and a coating device equipped with the blade device. A blade device according to the present invention has: a blade member contacting with a plate roll to which coating material is to be applied; an upper holder contacting with the blade member from one surface side of the blade member; a lower holder contacting with the blade member from another surface side of the blade member; a tube contacting with the blade member and configured to expand and contract by pressure of fluid; and a tube positioning part which is provided on the upper holder and positions the tube closer to the roller, in a direction in which the blade member extends, than a tip end of the lower holder is. The tube adjusts a pressing force, of the tip end of the blade member, against the roller by being expanded or contracted while being held by the tube positioning part and the blade member.