Canon Kabushiki Kaisha

Yasuhiro Shimoi

Yukihiro Soeta

Masafumi Takahashi

Yutaka Koga

Ryohei Terada

Yushi Sadamitsu

Hitoshi Kubota

Hiroki Takayama

A developer replenishing container configured to be detachably attachable to a developer replenishing device and to replenish developer via the developer replenishing device is disclosed. The developer replenishing container includes: a developer replenishing portion with a replenishing opening; and a shutter with at least one shutter opening that can communicate with the replenishing opening, the shutter being configured to open and close the replenishing opening according to attaching and detaching operations of the developer replenishing container, wherein the shutter is movable between a sealing position where the replenishing opening is sealed, a replenishing position where the shutter opening faces the replenishing opening to replenish developer from the developer replenishing container, and a filling position where the developer replenishing container is filled with developer without sealing the replenishing opening.

Developer replenishing container and method of reusing developer replenishment container

A cover covering an image bearing member such that the image bearing member is kept unexposed includes a holding portion holding an end portion of a sealing sheet sealing an opening portion such that an initial developer is accommodated in an accommodating chamber. Due to release of the seal of the opening portion with the sealing sheet, the initial developer accommodated in the accommodating chamber moves from the accommodating chamber to a second chamber through the opening portion, and

Image forming apparatus

An image forming apparatus includes a belt unit including an endless belt, a supporting unit and a steering unit, and further includes a cleaning unit, a receiving opening and a communicating portion. The communicating portion includes a tube-shaped portion constituted by a bellows-shaped elastic member capable of expansion and contraction with movement of the steering unit.

Image forming apparatus with belt unit having cleaning unit

An image forming apparatus is configured to output first information for urging arrangement of delivery of a container of toner based on a detection result of a toner sensor. When a first period from a detection of toner to an arrival at a first predetermined value of an accumulation value of a count portion is longer than a predetermined period, image formation is inhibited based on the accumulation value and second information for urging replacement of the container is outputted. When the first period is shorter than the predetermined period, the image formation is continued during the predetermined period until a detection result of a load sensor reaches a second predetermined value.

Image forming apparatus having control relative to collected toner amount

A developing device includes a rotatable developing member configured to carry a developer containing toner and a carrier to a developing position, a first frame configured to accommodate the developer, a second frame mounted on the first frame and configured to cover part of an outer peripheral surface of the rotatable developing member, and a cover portion provided opposite to the rotatable developing member. The following relationship is satisfied: LLL, and LL, where with respect to the radial direction of the rotatable developing member, Lis a minimum of the clearance formed between the second frame and the rotatable developing member, Lis a minimum of the clearance formed between the rotatable developing member and the cover portion, and Lis a minimum of the clearance formed between the second frame and the cover portion.

Developing device having spaced cover portion and frame

A developing device includes a rotatable developing member carrying a developer containing toner and a carrier to a developing position and a magnet provided fixedly inside the rotatable developing member and including first and second magnetic poles. A cover portion opposes the rotatable developing member. A most upstream end of the cover portion is positioned downstream of an uppermost position of the rotatable developing member and upstream of a most upstream position of a half-width of magnetic flux density of the first magnetic pole, and a most downstream end of the cover portion is positioned downstream of a first peak position and upstream of a position where the magnetic flux density of the first magnetic pole is a minimum on a side downstream of the first peak position and upstream of a second peak position where magnetic flux density of the second magnetic pole is a maximum.

Developing device

A contact and separating device includes a roller member disposed to be capable of being contacted to an abutted member, a bearing member supporting the roller member and configured to be movable together with the roller member in a contact and separation direction with respect to the abutted member, and a biasing member biasing the roller member toward the abutted member through the bearing member. The contact and separating device further includes a separation member holding the roller member and the abutted member in a separation state where the roller member is separated from the abutted member against a biasing force of the biasing member by engaging with the bearing member in the separation state, and a release member releasing engagement between the bearing member and the separation member by moving the separation member.

Contact and separating device and image forming apparatus

While providing an easy access to a working space between a secondary transfer roller and an intermediate transfer belt, an image forming apparatus is capable of ensuring a working space wider than a rotation radius of the secondary transfer roller in a state that the rotation center portion is pivotally supported on the image forming apparatus side. In a state that a rotation center portion engages with a rotation center hole provided in a housing frame, a secondary transfer unit is rotated on the rotation center hole to position the secondary transfer roller with respect to a secondary transfer counter roller. When the rotation center portion, which is engaged with the rotation center hole, is disengaged accompanying the opening operation of the exterior door, the exterior door supporting the secondary transfer unit is capable of opening widely outward.

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Toride, Japan

Yasuhiro Shimoi