Abstract: A device receives information regarding whether a cover of an authentication indicia of a consumable has been subject to tampering. In response to the information indicating that the cover of the authentication indicia has not been subject to tampering, the device obtains an image of the authentication indicia after the cover has been removed from the authentication indicia. The device performs an authentication process to authenticate the consumable based on the authentication indicia.

Abstract: A print material refill container includes a housing and a chamber, within the housing, to contain a print material. The print material refill container includes a physical indicator subject to modification based on an engagement of the physical indicator with an engagement member of a printing device when the print material refill container engages the printing device to deliver the print material to a reservoir of the printing device. The physical indicator indicates an unused condition of the print material refill container when the physical indicator has a first state prior to the modification, and the physical indicator indicates a used condition of the print material refill container when the physical indicator has a second state subsequent to the modification.

Abstract: A print material cartridge may include a hopper to maintain an amount of print material therein; and an atmospheric pressure seal to seal the hopper from atmosphere; wherein a pressure within the hopper and sealed by the atmospheric pressure seal is lower than atmosphere.

Abstract: In some examples, a print material apparatus includes a housing having an opening and an inner housing space, and a module removably attached to the housing to cover the opening, the module providing an inner module space that together with the inner housing space define a volume containing a print material of the print material apparatus. The housing is attachable to different modules that provide respective inner module spaces of different sizes for defining different print material containment capacities of the print material apparatus.

Abstract: In one example in accordance with the present disclosure, a refill container is described. The refill container includes a reservoir to house a volume of print compound and a chamber to house a pressurized fluid. A wall separates the reservoir from the chamber. A pressure release device of the refill container creates a fluid path between the chamber and the reservoir such that the pressurized fluid flows into the reservoir to mix with the volume of print compound. A trigger of the refill container activates the pressure release device.

Abstract: A print material cartridge (215) that includes a reservoir to maintain an amount of print material (Toner) therein; an agitator (230) formed within the reservoir to fragment clumps of print material present in the reservoir; and a tab (235) mechanically coupled to the agitator via a gear system (240), the tab extending out of a housing of the print material cartridge to activate the agitator as the print material cartridge is being interfaced with a printing device (205, 410).

Abstract: In one example, a detachable adapter to adapt a drive shaft on a printer to a drive mechanism on a toner cartridge and to transmit rotation of the drive shaft to the drive mechanism. The adapter includes a cylindrical part having a first end and a second end opposite the first end, the first end configured to detachably receive and engage an end of the drive shaft so that the part will rotate with the drive shaft when the part is attached to the drive shaft, and a driver mounted to or integral with the second end and configured to drivingly connect the part to the drive mechanism on the toner cartridge when the part is attached to the drive shaft and the toner cartridge is installed in the printer.

Abstract: According to examples, an apparatus may include a processor and a memory on which are stored computer-readable instructions that, when executed by the processor, may cause the processor to determine a property of dust based on information associated with the dust in a printing device. The processor may classify the dust according to the determined property of the dust and may determine a predicted failure mode associated with the dust classification. The processor may output an instruction associated with the predicted failure mode.

Abstract: In one example, a detachable adapter to adapt a drive shaft on a printer to a drive mechanism on a toner cartridge and to transmit rotation of the drive shaft to the drive mechanism. The adapter includes a cylindrical part having a first end and a second end opposite the first end, the first end configured to detachably receive and engage an end of the drive shaft so that the part will rotate with the drive shaft when the part is attached to the drive shaft, and a driver mounted to or integral with the second end and configured to drivingly connect the part to the drive mechanism on the toner cartridge when the part is attached to the drive shaft and the toner cartridge is installed in the printer.

Abstract: A print material cartridge may include a hopper to maintain an amount of print material therein; and an atmospheric pressure seal to seal the hopper from atmosphere; wherein a pressure within the hopper and sealed by the atmospheric pressure seal is lower than atmosphere.

Abstract: A print material cartridge (215) that includes a reservoir to maintain an amount of print material (Toner) therein; an agitator (230) formed within the reservoir to fragment clumps of print material present in the reservoir; and a tab (235) mechanically coupled to the agitator via a gear system (240), the tab extending out of a housing of the print material cartridge to activate the agitator as the print material cartridge is being interfaced with a printing device (205, 410).

Abstract: In one example in accordance with the present disclosure, a refill container is described. The refill container includes a reservoir to house a volume of print compound and a chamber to house a pressurized fluid. A wall separates the reservoir from the chamber. A pressure release device of the refill container creates a fluid path between the chamber and the reservoir such that the pressurized fluid flows into the reservoir to mix with the volume of print compound. A trigger of the refill container activates the pressure release device.

Abstract: A cartridge (1) to connect to a printer, the cartridge comprising a powder reservoir (2), a carrier (5) holding authenticity information (7, 9), a powder flow stimulator (3) in or near the reservoir (2), coupled to the carrier (5) so that a first stimulator movement displaces at least part of the carrier (5).

Abstract: An image forming apparatus includes a toner cartridge, a light source, a light guiding device, and an optical sensor. The toner cartridge includes a developer member and a photosensitive member. The developer member receives toner and applies the toner to the photosensitive member. The light source emits light. The light guiding device guides the light from the light source at a plurality of areas on the developer member. The optical sensor detects an amount of reflected light reflected from the developer member.

Abstract: Example implementations relate to end-of-life determination for a print cartridge. For example, a print cartridge according to the present disclosure, may include a plurality of consumable components. Each of the plurality of consumable components may have an associated sensor to monitor use of the respective consumable component. The print cartridge may further include a memory including instructions executable by a processor to, for each of the plurality of consumable components, receive a past use value quantifying an amount and type of use of the respective consumable component, determine an end-of-life value for the respective consumable component using the past use value and a predetermined tuning factor for the respective consumable component, and determine an end-of-life value for the print cartridge based on the plurality of end-of-life values for the plurality of consumable components.

Abstract: A cartridge (1) to connect to a printer, the cartridge comprising a powder reservoir (2), a carrier (5) holding authenticity information (7, 9), a powder flow stimulator (3) in or near the reservoir (2), coupled to the carrier (5) so that a first stimulator movement displaces at least part of the carrier (5).

Abstract: An electro-photographic print system or method for regulating a supply of toner based on a required toner amount.

Abstract: An electro-photographic print system or method for regulating a supply of toner based on a required toner amount.

Abstract: An electro-photographic print system or method for regulating a supply of toner based on a required toner amount.