Abstract:
A developing device includes a developer bearing member, a developing container which accommodates developer, a conveying screw which conveys the developer accommodated in the developing container, and an inductance sensor which includes a detecting portion which detects magnetic permeability of the developer accommodated in the developing container. The conveying screw includes a rotary shaft, a blade which is spirally formed on an outer circumference of the rotary shaft, and a rib formed to protrude outwardly from the outer circumference of the rotary shaft. The rib is disposed opposite the detection portion with respect to a conveying direction of the conveying screw and is provided with a magnet, with magnetic flux density of the magnet being in the range of 20 mT to 60 mT.
Abstract:
There are demands for stable connections of contact points between a process cartridge, including a development device, and an image forming device. A development contact point, a first contact point, and a second contact point are disposed in this order on the inside in a perpendicular direction with respect to an insertion direction in which a development device is inserted into an image forming apparatus.
Abstract:
There are demands for stable connections of contact points between a process cartridge, including a development device, and an image forming device. A development contact point, a first contact point, and a second contact point are disposed in this order on the inside in a perpendicular direction with respect to an insertion direction in which a development device is inserted into an image forming apparatus.
Abstract:
A molded resin product for use with an image forming apparatus includes: a base portion formed of a resin material; a positioning portion provided on the base portion; and a movable member formed by injection molding so as to be movable relative to the base portion. When the molded resin product is connected to a connection part, the positioning portion positions the molded resin product and the connection part relative to each other, and the movable member is contactable to a contact portion of the connection part.
Abstract:
One or more toner bottles are provided for supplying toners to development apparatuses. The toner bottles each include bottle portions and displacement sensors. The bottle portions accommodate the toners and are rotated by a drive force of a drive source. The displacement sensors are positioned on sides of the bottle portions and detect deflection amounts of the sides of the bottle portions to determine how much toner is remaining in each toner bottle.
Abstract:
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.
Abstract:
An electrophotographic image forming device includes a replaceable unit having a housing that includes a top, a bottom, a front, and a rear positioned between a first side and a second side of the housing. The housing has a reservoir for storing toner. A rotatable shaft is positioned within the reservoir and has an axis of rotation. A magnet in the reservoir is movable in response to rotation of the shaft. An engagement member is positioned on an exterior of the top of the housing. The engagement member is aligned with a point in a path of movement of the magnet in the reservoir. The engagement member has a front surface that is unobstructed to contact and push a housing in the image forming device supporting a magnetic sensor to an operating position of the magnetic sensor during insertion of the replaceable unit into the image forming device.
Abstract:
An assembly according to one example embodiment includes an electrically conductive fastener that includes a head and a shank. The shank extends from an undersurface of the head along a longitudinal axis of the fastener to a distal end of the fastener. A fastening hole is formed by an electrically nonconductive material. At least a portion of the shank of the fastener is installed in the fastening hole. An electrically conductive component is held between the undersurface of the head of the fastener and a surface surrounding an entrance to the fastening hole. An electrically conductive flange extends from the component and contacts an outer portion of the head of the fastener such that an electrical path is formed between the fastener and the component.
Abstract:
An image forming apparatus includes an image bearing drum; a developing device including a developing container accommodating a one component developer including toner, and a developer detector for detecting the developer in said developing container; a developer supply portion for supplying the developer into said developing container in accordance with a detection result of said detector; and a controller for controlling said developer supply device, in which a developer amount in said developing container when an image ratio of images formed by a predetermined number of image formations is a first image ratio is larger than the developer amount in said developing container when the image ratio of the images formed by a predetermined image formations is a second image ratio which is smaller than the first image ratio.
Abstract:
A replaceable unit for an electrophotographic image forming device according to one example embodiment includes a housing having a reservoir for storing toner. A rotatable shaft is positioned within the reservoir and has an axis of rotation. A first magnet and a second magnet are connected to the shaft and rotatable around the axis of rotation in response to rotation of the shaft. The first magnet and the second magnet are detectable by a magnetic sensor when the replaceable unit is installed in the image forming device. A polarity of the first magnet is oriented opposite a polarity of the second magnet relative to the shaft. An amount of angular offset between the first magnet and the second magnet varies depending on an amount of toner in the reservoir.