A logic circuitry package for a print apparatus component includes an interface to communicate with a print apparatus logic circuit, and at least one logic circuit. The at least one logic circuit is configured to receive, via the interface, a command series addressed to a first default address and a second default address, and transmit, via the interface, at least one response in response to at least one command of the command series. The at least one logic circuit is configured to receive, via the interface, an other command series addressed to an other first default address and subsequently, the second default address, and transmit, via the interface, at least one other response in response to at least one other command of the other command series.

An integrated circuit for a replaceable print apparatus component comprising a communication interface to communicate with a print apparatus logic circuit over the bus, and at least one logic circuit.

A powder transport device includes: a rotation shaft rotatably supported in a container chamber that contains powder and plural blade members detachably attached to the rotation shaft, the blade members including spiral blades configured to transport the powder in an axial direction of the rotation shaft in response to the rotation shaft rotating.

In an image forming apparatus, a controller controls a toner container so that toner in a toner container is supplied to a developing section according to replenishment amount information stored in storage. The developing section includes a developer container that contains toner supplied from the toner container, and a sensor that detects a concentration of the toner in the developer container. The controller changes a replenishment amount indicated in the replenishment amount information based on a predicted toner concentration value in the developer container after the toner is supplied to the developer container under control of the toner container, and a detected toner concentration value detected by the toner sensor.

According to a first aspect of the present invention, a developing apparatus includes a developer container, a conveyance screw, and an inductance sensor. The conveyance screw further comprises a rib, protruding in a radial direction from the shaft portion, provided at a position opposed to the inductance sensor, and a second blade portion provided continuously to an upstream end portion of the rib with respect to the conveyance direction and configured to convey the developer to the conveyance direction by rotation. The second blade portion is formed to extend not more than one-third of a turn from the upstream end portion of the rib downstream in a direction of rotation of the conveyance screw when viewed in an axial direction of the conveyance screw.

An information processing apparatus that is capable of improving estimating accuracy of a usable period of a fixing device. The information processing apparatus enables communication with an image forming apparatus to which one of fixing devices is selectively attachable. A controller obtains information about a type of a fixing device attached, determines a remaining period of a second fixing device based on second data about a consumption amount of the second fixing device in a case where a first fixing device of a first type is replaced with the second fixing device of a second type, and determines a remaining period of a third fixing device based on first data about a consumption amount of the first fixing device and third data about a consumption amount of the third fixing device in a case where the first fixing device is replaced with the third fixing device of the first type.

A method of manufacturing a developer container including a frame configured to define a developer containing portion, a first electrode, and a second electrode arranged on a surface of the frame and having a surface opposed to the first electrode, a developer amount in the developer containing portion being detected based on a capacitance between the first electrode and the second electrode, the method including: holding a conductive resin member constituting the second electrode on a mold configured to mold the frame, a surface of the conductive resin member being in contact with a surface of the mold configured to mold a surface of the frame on a side of the developer containing portion; injecting a resin to be formed into the frame, into the mold on which the conductive resin member is held; and curing the resin to form the frame to which the second electrode is fixed.

A remaining toner amount detecting apparatus detects a remaining toner amount in a toner bottle. The remaining toner amount detecting apparatus includes at least one pair of electrodes that are configured to face each other with the toner bottle interposed between the electrodes; a first estimator configured to estimate the remaining toner amount based on a capacitance between the electrodes of the at least one pair of electrodes; a second estimator configured to estimate the remaining toner amount by counting a number of pixels in a printed image; and an estimation selector configured to use either one of the first estimator or the second estimator to output the remaining toner amount, based on a temperature or a humidity inside an apparatus in which the toner bottle is mounted.

An image forming apparatus includes an image forming unit for forming an image on a sheet and a sheet conveying unit for conveying the sheet along a conveying path extending in a substantially horizontal direction in a lower portion of the image forming unit. The image forming apparatus includes a recovery container which is provided in front of the image forming unit and above the conveying path, and accommodates the waste toner discharged from the image forming unit. The image forming apparatus includes a waste toner conveying pipe that conveys the waste toner discharged from the image forming unit to the recovery container, without passing through the rear portion and the side portion of the image forming unit.

Toner contained in a toner container is used for replenishing a developing unit via an intermediate hopper. A toner sensor detects emptiness for the toner on an upstream side of a conveyance screw of the intermediate hopper in terms of the toner conveyance direction. Every time the toner sensor detects emptiness, the controller drives a rotation mechanism so that the toner is ejected from the toner container. Based on a drive history of a conveyance-purpose motor, the controller calculates a toner conveyance amount conveyed from the intermediate hopper between a time when the toner sensor detects emptiness and a time when the toner sensor detects emptiness again. When the calculated toner conveyance amount has been equal to or smaller than a first conveyance amount threshold value successively, the controller determines that the toner container is in a nearly empty state.