A developer cartridge comprises a first gear. The first gear may be rotatable about a first axis extending in an axial direction. The first gear may include a first surface rotatable with the first gear, and a second surface rotatable with the first gear. The first surface may extend in a circumferential direction of the first gear. The second surface may extend in the circumferential direction. The second surface may be separated from the first surface in the circumferential direction. A length of the second surface in the circumferential direction may be greater than a length of the first surface in the circumferential direction.

An image forming apparatus includes an image forming unit, a mounting portion, and a detecting device. The image forming unit forms an image using toner. A toner container of a given type is removably mounted on the mounting portion. The detecting device detects whether or not the toner container has been mounted on the mounting portion. The toner container and the mounting portion respectively include an engaging protrusion and an engaging hole. The engaging protrusion and the engaging hole are engageable with one another. The engaging protrusion and the engaging hole engaged with one another causes the detecting device to detect that the toner container has been mounted on the mounting portion. The engaging protrusion and the engaging hole are of form configured according to the toner container type.

A system with a container including a protrusion, and a receiver to receive the container. The receiver includes a slide block that is movable relative to a body of the receiver, the slide block including two surfaces, a first surface, initially contacted by the protrusion of the container during insertion of the container into the receiver, having a first slope to resist movement of the container towards the receiver, and a second surface, subsequently contacted by the protrusion of the container during the insertion of the container into the receiver, having a second slope to interact with the protrusion of the container to assist movement of the container towards the receiver. This construction provides the user with a changing insertion force to indicate proper mounting of the container.

An image forming apparatus including a wireless tag reader is described. The wireless tag reader is configured to be located in a first position to read wireless tags associated with consumables when the consumables are inserted into, stationary in, or removed from the image forming apparatus, and in a second position to read wireless tags outside of the image forming apparatus.

A cartridge including an interconnect circuit to communicate with a host device, a carrier storing an authenticity verification code readable by a scan device other than the host device, and an auto-destruct feature to render the authenticity verification code unreadable when installing the cartridge in the host device.

A misattachment prevention device for an image forming unit includes multiple developer containing parts that contain individual color developers, and process parts each of which is capable to be engaged with any of the developer containing parts, and forms the image forming unit for an individual color by having one of the developer containing parts engaged, wherein (c) each of the process parts is provided with an intermediate locking member guide part in a place opposing the one of the developer containing parts, and (d) the intermediate locking member guide part is provided with an intermediate locking member that is locked with a locking part formed on the one of the individual developer containing parts, protruded from the intermediate locking member guide part to a side of an apparatus main body, and locked with a locked part formed on the apparatus main body.

Provided is a developer cartridge attachable to and detachable from a main body of an image forming apparatus. The developer cartridge includes: a memory unit including a contact portion moved to a first position hidden inside the developer cartridge and a second position protruding outside the developer cartridge; an operating portion configured to move the contact portion to the first position and the second position; an outlet configured to discharge a developer; and a first shutter having an opening position and a closing position for opening and closing the outlet and moved to the closing position and the opening position when the contact portion is moved to the first position and the second position.

A toner cartridge comprises a toner container which contains toner, a driving member which rotationally drives a conveying member, an agitating member which agitates a toner in the toner container while being rotated, a driven member which rotates in association with the driving member which is for rotationally driving the agitating member, and a rotational body which rotates according to rotation of the driven member, has a plurality of slits in rotational circumference for identifying a type of the toner cartridge, and has 1/K or more of the slits when a ratio of a rotational speed R1 (rad/s) of the driving member and a rotational speed R2 (rad/s) of the driven member is K=R2/R1.

An imaging cartridge chip includes a communication module for providing data communication between the imaging cartridge chip and an imaging device; a non-volatile data storage module for storing at least two different serial numbers; a volatile temporary data storage module connecting between the communication module and the non-volatile data storage module and including at least two temporary data storage units; and a control module. The control module is configured to load different serial numbers into corresponding temporary data storage units; to send a serial number in a selected temporary data storage unit to the imaging device; to determine whether the serial number sent to the imaging device passes a legitimacy verification of the imaging device; and when the serial number sent to the imaging device does not pass the legitimacy verification, to send a serial number in another temporary data storage unit to the imaging device.

An image forming apparatus includes an image forming unit, a mounting portion, and a detecting device. The image forming unit forms an image using toner. A toner container of a given type is removably mounted on the mounting portion. The detecting device detects whether or not the toner container has been mounted on the mounting portion. The toner container and the mounting portion respectively include an engaging protrusion and an engaging hole. The engaging protrusion and the engaging hole are engageable with one another. The engaging protrusion and the engaging hole engaged with one another causes the detecting device to detect that the toner container has been mounted on the mounting portion. The engaging protrusion and the engaging hole are of form configured according to the toner container type.