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: 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: An example apparatus includes a packaging container, and any of a label and an electronic tag detachably connected to the packaging container and including an electrical code set for electrical authentication upon removal of any of the label and the electronic tag from the packaging container and being affixed to a device associated with the packaging container, wherein the electrical authentication is to validate the packaging container and the device as original equipment manufacturer components. Any of the label and the packaging container is altered upon removal of the label from the packaging container.

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: An image forming apparatus includes a development cartridge having a developing roller. The developing roller includes a roller body, and a shaft to pass through a central axis of the roller body. A coupling structure is disposed at an end part of the shaft, is movable from a first position to a second position, and includes a first coupling piece and a second coupling piece. Positions of the first coupling piece and the second coupling piece are maintained with respect to one another by a static frictional force between surfaces of the first coupling piece and the second coupling piece to hold the coupling structure in the first position. When a predetermined force overcomes the static frictional force, the first coupling piece and the second coupling piece disengage from one another to allow the coupling structure to move from the first position to the second position.

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. The developing roller includes a roller body, and a shaft to pass through a central axis of the roller body. A coupling structure is disposed at an end part of the shaft, is movable from a first position to a second position, and includes a first coupling piece and a second coupling piece. Positions of the first coupling piece and the second coupling piece are maintained with respect to one another by a static frictional force between surfaces of the first coupling piece and the second coupling piece to hold the coupling structure in the first position. When a predetermined force overcomes the static frictional force, the first coupling piece and the second coupling piece disengage from one another to allow the coupling structure to move from the first position to the second position.

Abstract: A print material container comprising a body, a transfer mechanism, an inner connector, and an outer connecter. The transfer mechanism is to move print material in or out of the body. The inner connecter is on a connecting side of the body, and is to couple to a first location of an image forming apparatus to provide print material to the image forming apparatus. The outer connecter is on the connecting side of the body, and is to couple to a second location of the image forming apparatus to collect or receive unutilized print material transferred or received from the image forming apparatus.

Abstract: A print material container comprising a body, a transfer mechanism, an inner connector, and an outer connecter. The transfer mechanism is to move print material in or out of the body. The inner connecter is on a connecting side of the body, and is to couple to a first location of an image forming apparatus to provide print material to the image forming apparatus. The outer connecter is on the connecting side of the body, and is to couple to a second location of the image forming apparatus to collect or receive unutilized print material transferred or received from the image forming apparatus.

Abstract: An example magnetic material supply apparatus includes a reservoir to contain a magnetic material, a connecting member having a first end coupled to the reservoir to receive the magnetic material, and a magnet. A magnetic field produced by the magnet controls supply of the magnetic material through the connecting member.

Abstract: An example apparatus includes a packaging container, and any of a label and an electronic tag detachably connected to the packaging container and including an electrical code set for electrical authentication upon removal of any of the label and the electronic tag from the packaging container and being affixed to a device associated with the packaging container, wherein the electrical authentication is to validate the packaging container and the device as original equipment manufacturer components. Any of the label and the packaging container is altered upon removal of the label from the packaging container.