The present invention relates to a gravure printing method of conducting printing on a printing substrate with an aqueous ink reserved in an ink pan using a furnisher roll, a gravure roll, a doctor blade and a nip roll, in which the aqueous ink contains a pigment, a polymer, an organic solvent, a surfactant and water; a content of organic solvent components of the organic solvent which have a boiling point of 100 to 260 C. in the aqueous ink is not less than 0.3% by mass and not more than 12% by mass; an average particle size of particles of the pigment is from 120 to 350 nm; and an arithmetic mean roughness (Ra) of a plate surface of the gravure roll is from 10 to 140 nm. According to the present invention, it is possible to improve transfer properties of the ink to the printing substrate such as a resin film, etc., and suppress fogging on the plate surface.

A processing machine, in particular a printing machine, includes a unit having a storage container. The storage container comprises a roller and a base which delimit the storage chamber for a medium. One or more sliders are arranged along the edge of the base to form, together with the roller, an outlet gap for the medium. In the region of the one or more sliders, pneumatic means are provided to seal the supply chamber with respect to the medium. A method for operating such a processing machine is also disclosed.

A doctor (20), in particular for printing cylinders and coating systems, includes a doctor edge (21), a doctor body (22), and a curved blade profile (25) which is formed between the doctor edge (21) and the doctor body (22). In order to produce a doctor (20) which reduces the maintenance requirements of a gravure, flexographic, offset and/or digital printing machine and increases the service life of a doctor (20), according to the invention the extension of the curved blade profile (25) from the doctor edge (21) to the doctor body (22) is square or cuboid and/or the extension of the curved blade profile (25) from the doctor edge (21) to the doctor body (22) has at least one turning point (26).

A gravure coater test apparatus includes a gravure roll and a backup roll which are circumscribed to each other, a motor which drives the gravure roll partially submerged in a water-based pressure-sensitive adhesive for coating, a controller which adjusts the rotational speed of the motor, a doctor blade which is selected from a plurality of types to scrape the water-based pressure-sensitive adhesive from the surface of the gravure roll being rotated, and an infrared analyzer which allows at least one of the type of the water-based pressure-sensitive adhesive corresponding to the selected doctor blade, the uniformity of the coating surface, and the amount of the coated water-based pressure-sensitive adhesive to be confirmed.

A blade assembly of a waste catchment system for a roller having a support plate for attachment to a tray of the waste catchment system and a blade holder. The blade holder configured to receive a blade having a longitudinal axis and a free edge extending in the direction of the longitudinal axis and adapted to engage with the roller to be cleaned. The blade holder configured to receive and retain the blade, the blade being removably attachable to the blade holder. One of the blade holder and blades includes a channel and the other of the blade holder and blade includes a protrusion configured to be seated in and retained within the channel. There is a clearance fit between the channel and the protrusion.

A doctor blade (5, 7) for contact with an anilox roller (15) comprises a flat, elongate base element having a thickness of less than about 0.3 mm, which, along a longitudinal region of the doctor blade adapted for contact with said anilox roller, is provided with a coating (43). The coating comprises a metal matrix and at least about 65% by weight of one or more ceramic(s). The coating comprises 0 to 65% by weight of chromium carbide. An inking arrangement comprises an anilox roller and a doctor blade. A doctor blade is used in flexographic printing.

Doctor blades (5, 7) for contact with an anilox roller (15) comprise a flat, elongate base element, which, along a longitudinal region of the doctor blade adapted for contact with said anilox roller, is provided with a coating (43). The coating comprises a metal matrix and at least about 65% by weight of a ceramic or at least about 65% by weight of chromium carbide. An inking arrangement comprises an anilox roller and a doctor blade. A doctor blade is used in flexographic printing.

A doctor blade (100), in particular for doctoring off printing ink from an impression cylinder, comprises a doctor blade body (110) with a working edge (130) and a first doctor blade side (122) which faces the impression cylinder, in particular, during operation, and a second doctor blade side (121) which faces away from the impression cylinder, in particular, during operation. The doctor blade body (110) is provided with a coating (150) which comprises a polymer, wherein the coating (150) comprises particles (160) at least in one part region. The particles (160) are configured as hard material particles (160), and a mass proportion of the hard material particles (160) in the coating (150) on the first doctor blade side (122) is higher than a mass proportion of the hard material particles (160) in the coating (150) on the second doctor blade side (121).

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.

A device (3000) for loading fluid into nozzle(s) of a nozzle-bearing body (3070) includes a first member (3010), having a first surface (3016), and a second member (3020) protruding from the first member (3010). The second member (3020) has second and third surfaces (3028, 3026), the second surface (3028) extending from the first surface (3016) at an angle. The first surface (3016) substantially complements the shape of the nozzle-bearing body's surface (3070). The device (3000) has a recess (3023) defined therein at least in part by the first and second surfaces (3016, 3028). When the device (3000) is placed into a working configuration with the nozzle-bearing body (3070), a tangent to the third surface (3026), in a region of the third surface (3026) proximate to where the second surface (3028) meets the third surface (3026), is substantially parallel to a tangent to the first surface (3016), in a region of the first surface (3016) where the first surface (3016) meets the second surface (3028), wherein, the recess (3023) forms a pocket for receiving the fluid.