There are provided a circulation path which can supply printing material to a printing element board having nozzle capable of ejecting printing material and collect printing material not ejected from the printing element board, an acquisition unit which acquires information on concentration of printing material circulating through the circulation path, and a discharge control unit which executes discharge control of printing material concentration in which printing material is discharged from the circulation path and the circulation path is supplied with an amount of printing material corresponding to a discharge amount according to the information on concentration. In a case where the discharge control is executed, the discharge control unit selectively executes one of first discharge control in which a discharge amount of printing material concentration is a first discharge amount and second discharge control in which the discharge amount is a second discharge amount greater than the first discharge amount.

A printing fluid delivery system includes a reservoir, a conduit system, and a first heating module. The reservoir may store printing fluid. The conduit system may include a plurality of conduit segments to transport the printing fluid between the reservoir and the printing fluid applicator. The first heating module may selectively heat one conduit segment to increase a temperature of the printing fluid therein to a first temperature which is greater than a second temperature of the printing fluid in an other conduit segment, and to thermally induce recirculation of the printing fluid.

An apparatus including a communication unit configured to communicate with a communication device and be able to output data stored in a memory to the communication device even without power supplied from a power supply to the apparatus stores, in the memory, status information to specify the status of the apparatus in a state in which the power supply supplies the power to the apparatus.

According to one embodiment, an ink circulation device includes a first tank which stores ink to be supplied to an ink jet head, a second tank which stores the ink returned from the ink jet head, and a circulation pump which circulates the ink stored in the second tank to the first tank. In addition, the ink circulation device according to the embodiment further includes a heating device which is in contact with and heats a bottom surface of the first tank, a bottom surface of the second tank, and a bottom surface of the circulation pump.

A high viscosity aqueous inkjet ink that is useful in ink jet printers. The ink comprises heat activated colorant solids that are not heat activated during the printing process, and are printed onto a substrate in the form of an image that can be transferred onto a subsequent or final substrate by applying heat and intimate contact between the two substrates. The ink can also be heat activated onto the substrate without further transfer by applying heat at the temperature that is suitable for the activation of the colorant.

An ink jet recording apparatus including: a head that ejects droplets of ink; a flow passage portion; and a temperature adjustment unit. The flow passage portion supplies the ink to the head. The flow passage portion includes, in a part thereof, a reservoir unit that reserves the ink. The temperature adjustment unit is capable of adjusting temperatures of the flow passage portion and the head independently of each other. The temperature adjustment unit controls the temperatures of the flow passage portion and the head so that the ink in the head becomes liquid from solid after ink in the flow passage portion is turned to liquid from solid.

An inkjet printer for printing on a continuous web of recording media includes a receiver to receive a beam of collimated light transmitted across the surface of a continuous web of recording media supported by a roller. The intensity of the transmitted beam received by the receiver can be used to determine the presence of a defect in the continuous web or in the roller. A controller is configured to reduce the speed of or stop movement of the web through the printer and to retract one or more printheads from a printing location to prevent the defect from damaging the printhead(s).

An apparatus including a communication unit configured to communicate with a communication device and be able to output data stored in a memory to the communication device even without power supplied from a power supply to the apparatus stores, in the memory, status information to specify the status of the apparatus in a state in which the power supply supplies the power to the apparatus.

According to one embodiment, an ink circulation device includes a first tank which stores ink to be supplied to an inkjet head, a second tank which stores the ink returned from the ink jet head, and a circulation pump which circulates the ink stored in the second tank to the first tank. In addition, the ink circulation device according to the embodiment further includes a heating device which is in contact with and heats a bottom surface of the first tank, a bottom surface of the second tank, and a bottom surface of the circulation pump.

A printer is provided for forming a phase change inkjet image on a print substrate. The printer includes a sheet transport unit for advancing the sheet along a print station. The sheet transport unit includes a sheet support platen, a sheet attraction mechanism and a feed mechanism. The sheet support platen includes a print surface for supporting a contact side of the print substrate. The sheet attraction mechanism is arranged for attracting the print substrate to the print surface. The feed mechanism is arranged for advancing the print substrate in a transport direction over the print surface, wherein the feed mechanism is arranged upstream of the print surface. The print station includes a print head assembly, the print head assembly being arranged for providing ink droplets for forming the phase change inkjet image on a process side of the print substrate, the print substrate being arranged on a print area of the print surface, the process side being opposite to the contact side. The print surface has an average surface roughness Ra being in the range of 1 micron to 4 micron.