Examples of a print liquid supply unit are described herein. In some examples, the print liquid supply unit includes a first housing component that is welded to a second housing component along a supply joint. In some examples, the print liquid supply unit also includes a conductor situated through the supply joint from an outside of the supply unit to an inside of the supply unit. In some examples, the conductor is sealed in the supply joint with a sealing material.

A system is disclosed. The system at least one physical memory device to store ink estimation logic and one or more processors coupled with the at least one physical memory device, to execute the ink estimation logic to receive a histogram for each of a plurality of color planes, receive uncalibrated drop fraction data for each of a plurality of drop sizes in a printing system, perform a direct drop fraction conversion of the uncalibrated drop fraction data to generate calibrated drop fraction data for each of the plurality of drop sizes by applying a first transfer function to the uncalibrated drop fraction data and generate estimated ink usage data for each of the plurality of drop sizes based on the histograms and the calibrated drop fraction data.

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 liquid ejecting apparatus includes a liquid ejection head that ejects a liquid, a supply flow path that supplies the liquid from a liquid containing portion, which is replaceable and contains the liquid, to the liquid ejection head, a liquid feeding portion that is provided in the supply flow path and is configured to suck the liquid from the liquid containing portion and to feed the liquid to the liquid ejection head, and a control unit that controls driving of the liquid feeding portion. The control unit changes driving control of the liquid feeding portion in accordance with a remaining amount of the liquid in the liquid containing portion.

An inkjet printing apparatus includes a first and second tanks, and a printer section including an inkjet head which ejects ink droplets toward a printing medium. The inkjet printing apparatus includes a first supply system which supplies ink from the first tank to the second tank, a second supply system which includes an ink supply pump and supplies ink from the second tank to the printer section, and a remaining amount detection unit which detects the amount of ink remaining in the first tank. The remaining amount detection unit calculates the amount of ink transferred from the first tank to the second tank in a measurement period during which ink is supplied from the first tank to the second tank, based on an increase in the amount of the ink stored in the second tank in the measurement period and the operation state of the pump in the measurement period.

A printing apparatus includes a liquid accommodation body into which liquid contained in a liquid container is configured to be poured, a printing section that performs printing by discharge of liquid supplied from the liquid accommodation body, a counting section that performs counting relating to an amount of consumption of liquid with which a liquid container was contained and counting relating to an amount of consumption of liquid per predetermined period of time, and a delivery request section that, based on a counting result yielded by the counting section, sends the server apparatus a delivery request for a liquid container by a time that is earlier by a delivery period of a liquid container than an estimated timing of completion of consumption of liquid with which a liquid container was contained.

There is provided with a printing apparatus. An ink tank stores ink to be supplied to a printhead configured to eject ink. An ink supply path supplies ink from the ink tank to the printhead. A conveying unit conveys a print medium to the printhead. A cover member is arranged so as to be able to open and close with respect to the printing apparatus. A manual valve is arranged in a region through which the print medium conveyed by the conveying unit passes and can be switched between an opening state in which the ink tank and the printhead communicate and a closing state. An operating portion is arranged at a position which is exposed when the cover member is opened and can be operated to switch the manual valve.

An inkjet recording apparatus includes a tank, a recording head, a cover, a monitor, a cover sensor, an operation panel, and a controller. The cover is movable to cover a plurality of injection inlets associated with a plurality of ink chambers and to expose the plurality of injection inlets. The cover sensor outputs signal depending on position of the cover. The controller controls the monitor to display one of inquiry information and notification on the monitor depending on receipt of the signal from the cover sensor.

An inkjet recording apparatus includes an ink tank, a recording head, an ink sensor, a monitor, an operation panel, and a controller configured to control operation thereof. The controller receives a completion signal indicating completion of ink injection, and receives a first signal or a second signal from the ink sensor based on whether a predetermined amount of ink is sensed in the ink chamber. Based on the completion signal and receipt of the first signal, inquiry information is displayed on the monitor regarding whether ink injection into the ink chamber is completed. Based on the completion signal and receipt of the second signal, a notification is displayed on the monitor that is based on the ink sensor not sensing the predetermined amount of ink.

Examples for cost generation for a common print substance supply are described herein. In some examples, signals indicative of an amount of print substance consumed by a plurality of printing devices are received at a computing device. Signals indicative of a cost corresponding to the amount of print substance consumed by each printing device of the plurality of printing devices are generated at a processor of the computing device based on the received signals. The cost is also generated based on a device identifier, a customer identifier, a print media identifier, or a combination thereof. The signals indicative of the cost for each printing device are transmitted.