Abstract: A continuous ink supply (CIS) apparatus, a CIS printer system and a method of CIS employ a one-way valve having a minimum negative activation pressure. The apparatus includes an off-axis ink supply to source liquid ink to a printhead of a printer. The one-way valve is positioned between the off-axis ink supply and the printhead. The minimum negative activation pressure at a printhead side of the one-way valve is at least enough to substantially precludes drooling from the printhead.

Abstract: A supply source indicator indicates whether an ink cartridge is received from a subscriber source. An ink order identifier indicates a combination of ink colors for different chambers in a color pert of a printer. When print data is received, the supply source indicator and the ink order identifier are accessed to determine whether the ink cartridge is received from a subscriber source.

Abstract: A supply source indicator indicates whether an ink cartridge is received from a subscriber source. An ink order identifier indicates a combination of ink colors for different chambers in a color pen of a printer. When print data is received, the supply source indicator and the ink order identifier are accessed to determine whether the ink cartridge is received from a subscriber source.

Abstract: An image forming system and methods are disclosed. The methods include detecting an ambient temperature of an image forming system by a first thermal sense resistor disposed in a first printhead to obtain a first detected ambient temperature, detecting the ambient temperature of the image forming system by a second thermal sense resistor disposed in a second printhead to obtain a second detected ambient temperature, and determining a temperature difference between the first detected ambient temperature and the second detected ambient temperature of the image forming system by a temperature variation module.

Abstract: A method for tuning ink usage includes storing an ink usage adjustment value in a memory of an ink cartridge; and with a printing system utilizing the ink cartridge, adjusting an ink usage of the ink cartridge based on the ink usage adjustment value. An ink cartridge includes a memory for storing an ink usage adjustment value, the ink usage adjustment value based on ink usage properties of the cartridge. A printing system utilizing the ink cartridge adjusts an ink usage of the ink cartridge based on the ink usage adjustment value.

Abstract: In an embodiment, an authentication system includes a base unit to receive a replaceable supply device, a controller integrated into the base unit, known characteristic data accessible by the controller, and an authentication algorithm executable on the controller to authenticate the supply device if a known characteristic measured on the supply device matches the known characteristic data.

Abstract: In an embodiment, an authentication system includes a supply device having a data storage chip with identification (ID) bit memory cells. The ID bit memory cells comprising a measured cell, pointer cells to store address information that points to the measured cell, and analog cells that store factory-measured analog information about the measured cell.

Abstract: One example discloses a peripheral supply component. The peripheral supply component includes a supply item (130) to provide resources on an installed peripheral component (110), wherein the supply item (130) is a consumable, upgradable, or replacement component on the installed peripheral component (110). An encoded component (140) is installed with the supply item (130), wherein the encoded component (140) is employed to generate a message event related to the peripheral component.

Abstract: A continuous ink supply (CIS) apparatus, a CIS printer system and a method of CIS employ a one-way valve having a minimum negative activation pressure. The apparatus includes an off-axis ink supply to source liquid ink to a printhead of a printer. The one-way valve is positioned between the off-axis ink supply and the printhead. The minimum negative activation pressure at a printhead side of the one-way valve is at least enough to substantially precludes drooling from the printhead.

Abstract: A consumable product can have an identifier stored on a circuit or machine-readable medium. The identifier can be used to verify the authenticity of the consumable product. The integrity of the identifier can be verified based on an integrity check portion of the identifier.

Abstract: Example secure upgrade supplies and methods are disclosed. A disclosed example secure upgrade method includes receiving a request at an imaging supply (115) for an authentication credential associated with the imaging supply (115), providing the authentication credential to an image forming apparatus (105), the provided authentication credential useable by the image forming apparatus (105) to authenticate an identity of the imaging supply (115), and providing upgrade data (110) to the image forming apparatus, the provided upgrade data (110) authenticatable at the image forming apparatus (105) based on the identity of the imaging supply (115), and useable by the image forming apparatus (105) to enable a capability of the image forming apparatus (105).

Abstract: A replaceable printing component is provided, including a fluid reservoir, an electrical storage device mounted on the fluid reservoir, and an identifier stored on the information storage device, wherein the identifier is fixed based on an initial volume of fluid stored in the fluid reservoir.

Abstract: In an embodiment, an authentication system includes a base unit to receive a replaceable supply device, a controller integrated into the base unit, known characteristic data accessible by the controller, and an authentication algorithm executable on the controller to authenticate the supply device if a known characteristic measured on the supply device matches the known characteristic data.

Abstract: A method for tuning ink usage includes storing an ink usage adjustment value in a memory of an ink cartridge; and with a printing system utilizing the ink cartridge, adjusting an ink usage of the ink cartridge based on the ink usage adjustment value. An ink cartridge includes a memory for storing an ink usage adjustment value, the ink usage adjustment value based on ink usage properties of the cartridge. A printing system utilizing the ink cartridge adjusts an ink usage of the ink cartridge based on the ink usage adjustment value.

Abstract: Example methods, apparatus and articles of manufacture to update a supported-supplies database (110) of an image forming apparatus (105) are disclosed. A disclosed example method includes detecting insertion of an imaging supply (120) into an image forming apparatus (105), interacting with the inserted imaging supply (120) to obtain a supply identifier, the supply identifier representing an additional supported imaging supply for the image forming apparatus (105), and adding the obtained supply identifier to a supported-supplies database (110) of the image forming apparatus (105).

Abstract: A replaceable printing component is provided, including a fluid reservoir, an electrical storage device mounted on the fluid reservoir, and an identifier stored on the information storage device, wherein the identifier is fixed based on an initial volume of fluid stored in the fluid reservoir.

Abstract: A fluid ejection device for use with a print system to eject fluid onto a substrate includes a fluid reservoir and an identifier associated with the fluid reservoir, wherein the identifier is fixed and specifies a nominal fluid ejection rate of fluid from the fluid reservoir.

Abstract: A replaceable printer component includes a memory and a communication link The memory stores a tag encryption mask and data. The data is stored in a plurality of portions of the memory where each portion is defined by a tag. The tag encryption mask indicates an encryption status of each portion of the memory defined by a tag. The communication link is configured to communicatively link the memory to a printer controller when the replaceable printer component is installed in a printing system.

Abstract: In one embodiment a cartridge holder includes: a body having a plurality of bays therein for holding a cartridge and each bay having an electrical connector associated therewith for connecting to a chip; an adapter removably attachable to the body at a bay, the adapter having a site for a chip at a location where a chip installed at the chip site is connected to a connector in the bay when the adapter is attached to the body; and each bay configured to hold: without an adapter attached to the body at the bay, a first cartridge having a first shape and a chip thereon, and, with the adapter attached to the body at the bay, a second cartridge having a second shape different from the first shape and the second cartridge not having a chip thereon.

Abstract: Embodiments of a fluid ejection device are disclosed.