Abstract: An example of a device (100) may include a valve body (108). The device may include a printing substance transfer window (122) through the valve body (108). The device (100) may include a printing substance dispensing nozzle (110) rotatable within the valve body (108) between a first orientation with an orifice of the printing substance dispensing nozzle (110) facing an internal face of the valve body (108) and a second orientation with the orifice (126) of the printing substance dispensing nozzle (110) facing the printing substance transfer window (122). The device (100) may include a dispensing-side gasket material (132) slideable against the internal face of the valve body (108) when rotating the printing substance dispensing nozzle (110) between the first orientation and the second orientation.

Abstract: The location of a printing device is determined. Environmental conditions in which the printing device operated when printing a print job are determined based on the determined location. An environmental adjustment factor for the printing device is determined based on the determined environmental conditions. A predicted print material usage of the printing device in printing the print job is adjusted based on the determined environmental adjustment factor.

Abstract: In response to detecting that a remaining supply of print material of a first cartridge has reached a first threshold, a printing device transmits a request. In response to detecting that a second cartridge has replaced the first cartridge, the printing device determines whether the remaining supply had reached a second threshold and whether a token permitting usage of the second cartridge was received responsive to the request. In response to determining that the remaining supply had reached the second threshold and that the token was received, the printing device prints with print material from the second cartridge.

Abstract: An image forming apparatus includes a development cartridge having a developing roller. A coupler for the image forming apparatus includes a shaft and a coupling structure to rotate the developing roller. The coupling structure is disposed at an end part of the shaft, is movable along an axial direction of the shaft and coupleable with another coupling structure of a print engine of the image forming apparatus. The coupling structure includes a body, a magnet disposed in the body to cause the coupling structure to be attracted to the another coupling structure so that the coupling structure is aligned with the another coupling structure, and a plurality of protrusions which protrude from the body in the axial direction to engage with the another coupling structure, the plurality of protrusions having at least one side with an inclined face.

Abstract: The number of days until a consumable item of a printing device reaches end of life is predicted based on a usage scenario of the printing device. An expected fulfillment time period is subtracted from the predicted number of days to determine a number of days until a fulfillment event occurs. A threshold remaining life of the consumable item is correlated with the number of days until the fulfillment event occurs. That the remaining life of the consumable item has reached the threshold remaining life is detected, and fulfillment of a replacement consumable item to replace the consumable item is responsively initiated.

Abstract: A printing device determines that a consumable item newly installed within a printing device has previously been used, based on a remaining life of the consumable item. In response to determining that the consumable item has previously been used, the printing device resets the remaining life of the consumable item.

Abstract: An example print material replenishment device includes a container to contain print material, a dispensing end to engage a fill port of a printing device, the dispensing end including an opening that is offset from a center axis of the container, and a rotatable cover coupled to the dispensing end, the rotatable cover to expose the opening of the dispensing end based on a rotation of the print material replenishment device.

Abstract: An example method comprises identifying a plurality of supply levels corresponding to a set of print supplies of a print device. The example method further comprises coordinating depletion of the set of print supplies by selecting between black print and process black print for a print job of the print device based on the plurality of supply levels.

Abstract: An example of a device (100) may include a valve body (108); a printing substance dispensing nozzle (110) rotatable within the valve body (108) between a sealed orientation and a dispensing orientation; and a locking rod extending through a locking rod window (146) in the valve body (108) and into a locking rod channel (144) in the printing substance dispensing nozzle (110), wherein the locking rod is movable within the locking rod window (146) between a first position, fixing the printing substance dispensing nozzle (110) in the sealed orientation, and a second position allowing rotation of the printing substance dispensing nozzle (110) to the dispensing orientation.

Abstract: A dispensable substance container may include a printing substance dispensing nozzle including a first material. The dispensable substance container an elongate body, including a wall, including a second material encompassing a cavity to contain a dispensable substance, and an attachment portion to attach the elongate body to the printing substance dispensing nozzle; and a structurally compromised portion of the elongate body extending along a length of the elongate body, wherein the elongate body and the attachment portion are to be severed along the structurally compromised portion by a pushrod moveable through the cavity to expel the dispensable substance out the dispensing nozzle.

Abstract: Examples described herein relate to a print particle refill device consistent with the disclosure. For instance, a print particle refill device may comprise a cap disk to form a barrier between the print particle refill device and a receptacle, a first liner adjacent to the cap disk to seal print particles in the print particle refill device, and an actuating liner to wipe print particles, when present, from the receptacle.

Abstract: In some examples, a computing device can include a processing resource and a memory resource storing instructions to cause the processing resource to determine, based on a geographic identifier of an imaging device, environmental information for a location associated with the imaging device, determine operational information for the imaging device, and select, based on at least one of the environmental information and the operational information, a print material supply for the imaging device.

Abstract: An image forming apparatus includes a development cartridge having a developing roller. A coupler for the image forming apparatus includes a shaft and a coupling structure to rotate the developing roller. The coupling structure is disposed at an end part of the shaft, is movable along an axial direction of the shaft and coupleable with another coupling structure of a print engine of the image forming apparatus. The coupling structure includes a body, a magnet disposed in the body to cause the coupling structure to be attracted to the another coupling structure so that the coupling structure is aligned with the another coupling structure, and a plurality of protrusions which protrude from the body in the axial direction to engage with the another coupling structure, the plurality of protrusions having at least one side with an inclined face.

Abstract: Upon fulfillment of a replacement cartridge of print material, whether projected usage of a printing device will likely deplete a current cartridge of print material prior to anticipated arrival of the replacement cartridge is determined. Responsive to determination that the projected usage will likely deplete the current cartridge prior to the anticipated arrival of the replacement cartridge, the printing device is to enter a reduced print material usage mode during subsequent actual usage of the printing device.

Abstract: A machine learning model provides a correction factor to predicted print material usage on a per-print job basis. The machine learning model is trained based on print job information of print jobs printed by printing devices using print material from cartridges received on a per-print job basis, and based on predicted print material usage by the printing devices in printing the print jobs received on a per-print job basis. The machine learning model is further trained based on measured actual remaining print material within the cartridges after the cartridges have been replaced within the printing devices by new cartridges.

Abstract: In some examples, a computing device can include a processing resource and a memory resource storing instructions to cause the processing resource to receive a diagnostic image including a print quality characteristic associated with a print cartridge of an imaging device, compare the print quality characteristic to a reference characteristic of a reference image, and determine whether an amount of print material in the print cartridge is less than a threshold amount in response to the comparison.

Abstract: In some examples, a computing device can include a processing resource and a memory resource storing instructions to cause the processing resource to determine, for a print material supply to be shipped to a location, whether a thermal excursion is predicted to occur based on weather information for the location and shipping service information, determine, in response to the thermal excursion being predicted, whether an unsafe delivery of the print material supply is predicted to occur at the location, and in response to the unsafe delivery being predicted, cause thermal protection to be provided for the print material supply during shipment to the location.

Abstract: Parameters particular to the consumable item and that affect calculation of an estimated remaining life of the consumable item when used in the printing device for printing are received. A payload is constructed based on the parameters. The printing device is to use the parameters when calculating the estimated remaining life of the consumable item during usage of the consumable item for printing.

Abstract: A device is to supply printing material to a printing material container in a printing apparatus. The device includes a first container to contain printing material, a first piston movable in the first container to exert first pressure to discharge the printing material contained in the first container from the first container, a second container having an opening to the first container, and a second piston movable in the second container to exert second pressure higher than the first pressure to form a pressure gradient based on the first pressure and the second pressure through the opening. The pressure gradient is to disperse the printing material in the first container.

Abstract: A device to supply printing material to a printing material container of a printing apparatus includes a container including a plunger and to contain the printing material, a portal couplable to a refill port to the printing material container. The portal includes a discharge port through which the printing material is transferrable from the container, and a connector to receive power to move the plunger, to cause a transfer of the printing material contained in the container to the printing material container through the discharge port.