The present disclosure provides a system for punting. The present disclosure further provides a method for preventing or minimizing printing defects in a printing process.

Disclosed is a method to mitigate deterioration of printing fluid in a tank of a printer. The method comprises: draining printing fluid from a tank of a printer, and stopping the draining before the tank is empty, wherein the printing fluid comprises solids suspended in imaging oil, filtering the printing fluid drained from the tank, to separate at least some of the solids from the imaging oil, passing the filtered imaging oil to a reservoir; and then passing imaging oil from the reservoir to the tank. Also disclosed is a printer and a system to perform the method.

A monitoring device is configured to monitor image recordation by a recorder using a recording material supplied from a first cartridge and a second cartridge. the monitoring device includes a memory and a controller. The controller is configured to obtain number-of-sheet information indicating a number of sheets on which the image recordation has been performed, first consumption amount information indicating a consumption amount of a recording material consumed from the first cartridge, and second consumption amount information indicating a consumption amount of a recording material consumed from the second cartridge, determine ratio information indicating a ratio of the recording material consumed from the second cartridge to a total consumption amount of the recording material consumed from the first and second cartridges based on the obtained first and second consumption amount information, and store the obtained number-of-sheet information and the determined ratio information in the memory.

An image recording apparatus includes a controller configured to perform at least one of storing apparatus identification information stored in a memory into a cartridge memory via a cartridge interface and storing cartridge identification information stored in the cartridge memory into the memory via the cartridge interface, receive permission application information from another apparatus via a communication interface, determine whether or not reception identification information included in the received permission application information is identical to the apparatus identification information or the cartridge identification information stored in the memory, and transmit permission information representing that the said another apparatus is permitted to perform printing, to the said another apparatus via the communication interface, when determining that the cartridge has been removed from the attachment case and that the reception identification information is identical to the apparatus identification information or the cartridge identification information.

A printing device includes a printing unit configured to use ink stored in an ink cartridge to perform printing on a medium, a remaining amount detector configured to detect a remaining amount of the ink stored in the ink cartridge, a maintenance unit configured to perform maintenance on the printing unit, and a display unit configured to perform predetermined notification regarding either replacement of the ink cartridge or refilling of the ink cartridge with the ink. Either the printing device or a server device includes a selector configured to select either the maintenance to be performed or the predetermined notification based on the remaining amount of the ink when an amount of the ink used for a predetermined time period is equal to or smaller than a defined amount based on information on the amount of the ink used.

There is provided a liquid discharge apparatus including: a head having a nozzle; a tank; a gas channel; a valve unit; a memory; and a controller. The controller is configured to execute: making of the valve unit to be in an open state, under a condition that a count value indicating an amount of a liquid discharged from the nozzle has reached an opening threshold value ΔV. The opening threshold value ΔV is represented by: ΔV≤(Vtmax−Vi)×Pm/(P−Pm). Note that Vtmax represents a volume of the tank, Vi represents the maximum amount of the liquid storable in the tank, P represents an atmospheric pressure, and Pm represents a meniscus-withstanding pressure of the liquid formed in the nozzle.

The present disclosure provides a printing apparatus that is capable of obtaining accurately the amount of a waste liquid discharged from a printing unit. The printing apparatus includes a discharge unit that executes a discharge operation to discharge the liquid from the ejection port of the printing unit. The printing apparatus also includes a determination unit that determines filling states of the liquid in a printing apparatus main body and the printing unit and an obtaining unit that obtains, based on the filling states, a waste liquid amount discharged from the ejection port by the discharge operation.

A sensor circuit for a replaceable print apparatus component comprises an interface to transmit signals with respect to a print apparatus logic circuit, and further comprises, connected to the interface, at least two sensor cell arrays, each array including nominally the same cells, the cells of one array being nominally different than the cells of the other array, and at least one single cell sensor that is nominally different than the other cells.

A printing apparatus includes at least a tank configured to hold a first printing material at a first position and a tank configured to hold a second printing material at a second position different from the first position. A light emitting control unit controls light emitting states of a plurality of light emitters. If an amount of the printing material in the first tank is smaller than a predetermined amount, and an amount of the printing material in the second tank is larger than a predetermined amount, the light emitting control unit transits a state of a first light emitter from a state when the amount of the printing material is larger than the predetermined amount to a state when the amount of the printing material is smaller than the predetermined amount, and maintains a state of a second light emitter.

Examples of a print liquid supply unit are described herein. In some examples, the print liquid supply unit includes a regulator assembly. In some examples, the regulator assembly includes an at least partially expandable or contractible pressure chamber. In some examples, the print liquid supply unit includes a port. In some examples, the print liquid supply unit includes sensor circuitry positioned between the regulator assembly and the port in a print liquid reservoir.