Abstract: A developing device includes a stirring member including a flexible sheet member having a first sheet portion and a second sheet portion overlapping each other with respect to a thickness direction of the sheet member. With respect to a lateral direction of the sheet member which is a direction from a fixed end fixed to a rotating shaft portion to the free end, a length of the first sheet portion is longer than a length of the second sheet portion, and when the stirring member is rotated, a free end of the first sheet portion is capable of contacting an inner wall surface of a toner accommodation chamber. The sheet member is provided with a through hole penetrating in a thickness direction of the sheet member in a region where the first sheet portion and the second sheet portion overlap each other.

Abstract: A developing device includes a frame having an accommodation chamber where a developer is accommodated, and a replenishing port replenishing a developer to the accommodation chamber from outside; and a stirring member stirring the developer in the accommodation chamber, the stirring member including a rotating shaft portion rotatably supported by the frame and a sheet member having one end fixed to the rotating shaft portion and another end as a free end and being rotatable with the rotating shaft portion. When the stirring member is rotated, the free end of the sheet member is capable of contacting an inner wall surface of the accommodation chamber in which the replenishing port is formed, and a through hole penetrating in a thickness direction of the sheet member is provided in a region of the sheet member that comes into contact with the inner wall surface of the accommodation chamber.

Abstract: A developing device includes a frame having an accommodation chamber where a developer is accommodated, and a replenishing port replenishing a developer to the accommodation chamber from outside, and a stirring member stirring the developer in the accommodation chamber. The stirring member includes a rotating shaft portion rotatably supported by the frame and a sheet member having one end fixed to the rotating shaft portion and another end as a free end and being rotatable with the rotating shaft portion. When the stirring member is rotated, the free end of the sheet member is capable of contacting an inner wall surface of the accommodation chamber in which the replenishing port is formed, and a through hole penetrating in a thickness direction of the sheet member is provided in a region of the sheet member that comes into contact with the inner wall surface of the accommodation chamber.

Abstract: An image forming apparatus that executes an image forming operation for forming a toner image on a recording material and an application operation of applying a metal soap to a surface of an image bearing member by supplying a toner stored in a toner storing unit to the surface of the image bearing member from the developing member. A surficial moving speed of the image bearing member during the application operation is lower than the surficial moving speed of the image bearing member during the image forming operation, and a speed difference between the surficial moving speed of the developing member and the surficial moving speed of the image bearing member during the application operation is larger than that during the image forming operation.

Abstract: In an image forming apparatus, when a cartridge is unused, a control portion performs a preparatory operation of initiating rotational drive of a rotating member in a first rotational speed by second drive unit, and then initiating rotational drive of an image bearing member by first drive unit with the surface of the rotating member in contact with the surface of an image bearing member and then, driving the rotating member in a second rotational speed smaller than the first rotational speed prior to the image forming operation, and a ratio of the surface movement speed of the first rotational speed of the rotating member to the surface movement speed of the image bearing member in the preparatory operation is greater than the ratio of the surface movement speed of the rotating member to the surface movement speed of the image bearing member in the image forming operation.

Abstract: A developing device includes a frame having an accommodation chamber where a developer is accommodated, and a replenishing port replenishing a developer to the accommodation chamber from outside; and a stirring member stirring the developer in the accommodation chamber, the stirring member including a rotating shaft portion rotatably supported by the frame and a sheet member having one end fixed to the rotating shaft portion and another end as a free end and being rotatable with the rotating shaft portion. When the stirring member is rotated, the free end of the sheet member is capable of contacting an inner wall surface of the accommodation chamber in which the replenishing port is formed, and a through hole penetrating in a thickness direction of the sheet member is provided in a region of the sheet member that comes into contact with the inner wall surface of the accommodation chamber.

Abstract: A developing apparatus, includes: a developer bearing member that encloses a magnet roller having a plurality of magnetic poles and is rotatable; a wall that forms a developer storing chamber for storing a magnetic developer therein; a restricting member configured to restrict a layer thickness of the magnetic developer carried by the developer bearing member; and a moving member configured to move the magnetic developer carried by the developer bearing member before the magnetic developer is restricted by the restricting member, the moving member being brought into contact with a surface of the developer bearing member, the moved developer being on the developer veering member after the moving member moved the developer on the developer bearing member, wherein the moving member is disposed at a position opposed to any of the magnetic pole positions of the plurality of magnetic poles.

Abstract: An image forming apparatus that executes an image forming operation for forming a toner image on a recording material and an application operation of applying a metal soap to a surface of an image bearing member by supplying a toner stored in a toner storing unit to the surface of the image bearing member from the developing member. A surficial moving speed of the image bearing member during the application operation is lower than the surficial moving speed of the image bearing member during the image forming operation, and a speed difference between the surficial moving speed of the developing member and the surficial moving speed of the image bearing member during the application operation is larger than that during the image forming operation.

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: A developing apparatus, includes: a developer bearing member that is rotatable; an moving member configured to move the magnetic developer carried on the developer bearing member before the magnetic developer is restricted by a restricting member, the moving member being rotatable and brought into contact with a surface of the developer bearing member; and a control portion, wherein, at a contact position between the developer bearing member and the moving member, assuming that a moving speed vector of a surface of the developer bearing member is taken as R and a moving speed vector of a surface of the moving member is taken as r, the control portion controls rotational operation of the developer bearing member and the moving member such that a direction of a vector R?r during image formation and a direction of a vector R?r during non-image formation be opposite to each other.

Abstract: A developing apparatus, includes: a developer bearing member that is rotatable; an moving member configured to move the magnetic developer carried on the developer bearing member before the magnetic developer is restricted by a restricting member, the moving member being rotatable and brought into contact with a surface of the developer bearing member; and a control portion, wherein, at a contact position between the developer bearing member and the moving member, assuming that a moving speed vector of a surface of the developer bearing member is taken as R and a moving speed vector of a surface of the moving member is taken as r, the control portion controls rotational operation of the developer bearing member and the moving member such that a direction of a vector R?r during image formation and a direction of a vector R?r during non-image formation be opposite to each other.

Abstract: A developing apparatus, includes: a developer bearing member that encloses a magnet roller having a plurality of magnetic poles and is rotatable; a wall that forms a developer storing chamber for storing a magnetic developer therein; a restricting member configured to restrict a layer thickness of the magnetic developer carried by the developer bearing member; and a moving member configured to move the magnetic developer carried by the developer bearing member before the magnetic developer is restricted by the restricting member, the moving member being brought into contact with a surface of the developer bearing member, the moved developer being on the developer veering member after the moving member moved the developer on the developer bearing member, wherein the moving member is disposed at a position opposed to any of the magnetic pole positions of the plurality of magnetic poles.

Abstract: An image forming apparatus includes an agitating member, a first electrode, a second electrode disposed with a gap from the first electrode such that the gap has a smallest portion located below a rotation center of the agitating member and a remote portion wider than the smallest portion and located above the smallest portion, and a frame body having a first wall surface having the first electrode disposed thereon and a second wall surface having the second electrode disposed thereon, and a developer detecting unit configured to detect an amount of developer from an output value output in accordance with a capacitance formed between the first electrode and the second electrode. The image forming apparatus performs correction and detects the amount of developer.

Abstract: A developer container includes: a housing chamber 147 which includes an opening 145 and which houses developer; a stirring member 160 which includes a sheet-like stirring portion 160b and a rotary shaft 160a to which the stirring portion 160b is attached; and a first electrode 143 and a second electrode 144 which are used to detect an amount of the developer and which are arranged with an interval therebetween, wherein an area X1 between the first electrode 143 and the second electrode 144 in the housing chamber 147 is positioned below the rotary shaft 160a of the stirring member 160, and the sheet-like stirring portion 160b comes into contact with the area X1 due to rotation of the stirring member 160.

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: 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: A developer container includes: a housing chamber 147 which includes an opening 145 and which houses developer; a stirring member 160 which includes a sheet-like stirring portion 160b and a rotary shaft 160a to which the stirring portion 160b is attached; and a first electrode 143 and a second electrode 144 which are used to detect an amount of the developer and which are arranged with an interval therebetween, wherein an area X1 between the first electrode 143 and the second electrode 144 in the housing chamber 147 is positioned below the rotary shaft 160a of the stirring member 160, and the sheet-like stirring portion 160b comes into contact with the area X1 due to rotation of the stirring member 160.

Abstract: This disclosure provides a developer container in which a conductive resin sheet is used as an electrode for detecting an amount of developer by using electrostatic capacitance. A configuration in which an end of the conductive resin sheet in a longitudinal direction is provided outside an end of a sheet member in a longitudinal direction, or a configuration in which the sheet member starts contact with the conductive resin sheet from a second surface on the downstream side in a direction or rotation than a first surface are also provided.

Abstract: An image forming apparatus includes an agitating member, a first electrode, a second electrode disposed with a gap from the first electrode such that the gap has a smallest portion located below a rotation center of the agitating member and a remote portion wider than the smallest portion and located above the smallest portion, and a frame body having a first wall surface having the first electrode disposed thereon and a second wall surface having the second electrode disposed thereon, and a developer detecting unit configured to detect an amount of developer from an output value output in accordance with a capacitance formed between the first electrode and the second electrode. The image forming apparatus performs correction and detects the amount of developer.

Abstract: A developer container includes: a housing chamber 147 which includes an opening 145 and which houses developer; a stirring member 160 which includes a sheet-like stirring portion 160b and a rotary shaft 160a to which the stirring portion 160b is attached; and a first electrode 143 and a second electrode 144 which are used to detect an amount of the developer and which are arranged with an interval therebetween, where in an area X1 between the first electrode 143 and the second electrode 144 in the housing chamber 147 is positioned below the rotary shaft 160a of the stirring member 160, and the sheet-like stirring portion 160b comes into contact with the area X1 due to rotation of the stirring member 160.