A printhead contamination prevention device is disclosed. The printhead contamination prevention device includes a mounting fixture, optionally rotatable to multiple angles about a central axis, and an optionally movable blade attached to the mounting fixture, where an angle of the mounting fixture and a position of the movable blade create a gap between a tip of the movable blade and a printing media. An angle of the movable blade relative to the printing media is from about 15 degrees to about 35 degrees and a gap between the tip of the blade and the printing media is from about 0.1 mm to about 0.75 mm. A method for preventing contamination in a printing system by blocking one or more droplets of a non-pigmented fluid ejected from the primer dispensing printhead that are not coated onto the surface of the media from moving along the media path is disclosed.

An ink set includes: an inkjet ink; and a cleaning solution, the inkjet ink including a pigment and an aqueous medium, a drying ratio of the inkjet ink when left to stand at 40 C. for 24 hours being 87 mass % or more and 93 mass % or less, the cleaning solution including diethylene glycol butyl methyl ether and trihydric or higher polyhydric alcohol.

A cleaning method for an inkjet print head includes rubbing the ink discharging surface of the inkjet print head that discharges an ink with a wiper blade, wherein the ink is an oil-based ink containing a coloring material and a solvent mixture, the solvent mixture including an ester-based solvent represented by the following Chemical Formula 1 accounting for 5 to 70 percent by mass of the organic solvents and a saturated hydrocarbon solvent accounting for 20 to 80 percent by mass of the organic solvents, wherein the solvent mixture includes organic solvents having a boiling point of at least 100 degrees Celsius accounting for at least 70 percent by mass of the ink, wherein the wiper blade includes nitrile rubber containing at least 30 percent by mass of acrylonitrile,

##STR00001## where R.sup.1 and R.sup.2 each independently represent a linear or branched, saturated or unsaturated aliphatic alkyl group.

There is provided a liquid ejecting apparatus including: a head having a nozzle surface in which a nozzle is opened; a wiper configured to move relative to the head in a state that the wiper is in contact with the nozzle surface; and a controller. The controller is configured to move the wiper relative to the head based on a moving velocity determined based on parameters including first parameter according to a receding contact angle of a liquid to be discharged from the nozzle and second parameter according to a viscosity of the liquid.

A liquid ejection apparatus includes a liquid ejection head, a wiper that wipes a head surface with nozzles provided thereon in the liquid ejection head by moving with respect to the head surface to wipe the head surface, and at least one contact member provided integrally with the liquid ejection head and configured to come into contact with the medium conveyed between the head surface and a facing portion, wherein the contact member is displaceable between a first position and a second position that are relative positions to the head surface, the first position is a position at which the contact member is allowed to interfere with the wiper and come into contact with the medium, and the second position is a position at which the contact member is not allowed to interfere with the wiper.

An inkjet printing device. The inkjet printing device includes a printing table, a printhead, an ink supply module, and a cutter module. The printhead can print on a printing material disposed on the printing table. The ink supply module can supply ink to the printhead. The cutter module is configured to cut the printing material disposed on the printing table. The printhead includes a shell, a color ink printing module, and a white ink printing module. The shell defines a first through-opening on a surface of the shell facing the printing table. The color ink printing module and the white ink printing module are disposed opposite to the first through-opening, and are arranged in sequence in a conveying direction of the printing material. The inkjet printing device further includes a pressing mechanism. The pressing mechanism includes a second driving mechanism and a pressing roller.

A printing process assistance system includes a printing part that executes a printing process of printing a paste material onto a board, and a cleaning process of cleaning a lower surface of the mask a predetermined number of cleaning times at a predetermined cleaning interval; a control part that controls an operation in each of the printing process and the cleaning process; an inspection part that inspects a level of a smudge of the paste material on the board subjected to the printing process; and an information output part that outputs, when a result of the inspection shows continual smudge occurrence, assistive information to reduce the smudge to a destination which is at least one of the control part or a notification part configured to notify an operator of information. The information output part outputs information to increase a frequency of cleaning processes as the assistive information.