Canon Kabushiki Kaisha

Keita Nakajima

Masaki Hirose

Koji Miwa

Yuji Mitsui

Ryuji Tanaami

Kazushi Nishikata

Fumiki Inui

Hidehiro Ushiozu

Ko Katahira

Satoru Taniguchi

Takashi Honke

Taisuke Minagawa

Hirohiko Aiba

Koichi Yamada

Takashi Kuwata

Mahito Yoshioka

Takateru Ohkubo

Kenji Takagi

Takehito Osada

Kenji Abe

Kentarou Tomoe

Tomonari Inoue

Toshinori Shiratori

Tsutomu Ishida

Akira Matsushima

A sheet conveyance apparatus includes a roller pair having first and second rollers, a roller holder having first and second guided portions, and a guiding portion having first and second guides. The first and second rollers can take a first state where the first roller contacts the second roller with a predetermined force and take a second state where the predetermined force is reduced. A first direction in which the first guide guides the first guided portion is inclined relative to a second direction in which the second guide guides the second guided portion. When viewed in a rotational axis direction of the first roller with the first and second rollers in the first state, an angle formed by a straight line passing through rotational centers of the first and second rollers and the first direction is smaller than an angle formed by the straight line and the second direction.

Sheet conveyance apparatus and image forming apparatus

An image forming apparatus includes an apparatus body, an opening and closing member configured to move between a closed position and an open position. The apparatus body includes an image forming portion, a sheet conveyance path including a first conveyance path and a second conveyance path, a guide member configured to move to a first guide position and a second guide position, a drive source, and a guide moving member including a pressing portion. The guide member is configured to move to a first retraction position to open the sheet conveyance path. The pressing portion is disposed at a position not overlapping a movement locus of the pressed portion in a case where the guide member moves between the first guide position, the second guide position, and the first retraction position.

Image forming apparatus

The present invention provides an image forming apparatus including: a first moving member pressed and moved by an openable/closable member when the openable/closable member is opened, and switching a cartridge from a state where the cartridge is positioned in an image forming position to a state where the positioning is released; and a second moving member pressed and moved by the openable/closable member when the openable/closable member is opened, and moving the exposure member from an exposure position to a retracted position, wherein when the positioning of the cartridge is released, a reaction force applied from the first moving member to the openable/closable member reaches a first peak, when the exposure member is moved to the retracted position, a reaction force applied from the second moving member to the openable/closable member reaches a second peak, and timing of the first peak is different from timing of the second peak.

A conveyance device to convey a sheet includes an apparatus main body including a regulating portion, an opening/closing door including a first guide portion, and a conveyance guide supported by the opening/closing door and having a second guide portion and a regulated portion. The opening/closing door moves relative to the apparatus main body between an open position and a closed position where the conveyance guide is placed between the apparatus main body and the opening/closing door. When the conveyance guide pivots in an away direction where the second guide portion moves away from the first guide portion with the opening/closing door in the open position, the regulated portion contacts the regulating portion to regulate rotation of the conveyance guide in the away direction. The second guide portion and the regulated portion are on one side of a pivot axis in a direction that is perpendicular to a pivot axis direction.

Conveyance device and image forming apparatus

An image forming apparatus includes an upper guide unit fixed to the image forming apparatus and configured to guide an upper surface of the sheet discharged by a roller pair, a stack unit provided at a position recessed from an upper exterior unit of the image forming apparatus, and an operation unit including a display unit. The discharged sheets are stacked on the stack unit. The upper guide unit extends more to a downstream side in the discharge direction than the roller pair. The operation unit and the upper guide unit each have a portion overlapping with each other. When viewed in an axial direction of the roller pair, the operation unit and the upper guide unit are arranged at positions through which a straight line orthogonal to a plane passing through axes of rollers of the roller pair and passing through a nip portion of the roller pair passes.

An image forming apparatus includes a first detection unit, a second detection unit, a first conveyance unit, a second conveyance unit, which is provided on downstream in the conveyance direction with respect to the first detection unit and is configured to convey sheets, and a control unit. When the first detection unit does not detect a trailing edge of a first sheet before a first timing, the control unit stops the drive of the first conveyance unit and continues drive of the second conveyance unit, and when the second detection unit detects the trailing edge of the first sheet before a second timing later than the first timing, the control unit re-drives the first conveyance unit or stops the drive of the second conveyance unit in accordance with a sheet length of the first sheet in the conveyance direction.

An image forming apparatus includes an image forming portion, a fixing portion, a duct and a water vapor moving portion through which water vapor generated in the fixing portion moves. The water vapor moving portion is cooled by air blowing in the duct.

Image forming apparatus and dew condensation countermeasurement system

In an image forming apparatus, a removal unit includes a sheet member that has elasticity and contacts a rotator, and an absorption member that is thicker than the sheet member and arranged opposite to the rotator via the sheet member to absorb a water droplet, and the absorption member absorbs the water droplet removed by the sheet member from the rotator.

An image forming apparatus comprises a light-emission unit, a reflecting member, a light-receiving unit, a detection unit, a ventilation unit configured to send air to the reflecting member, and a control unit. The control unit adjusts at least one of an operation duration and an airflow rate of the ventilation unit, in accordance with a detection signal outputted by the light-receiving unit when a sheet is not at a position where light crosses a conveyance path.

Image forming apparatus that has sheet sensor

The sheet feeding apparatus includes an encoder configured to output a signal according to the rotation state of a retard roller, a feed motor configured to drive a pick-up roller, and a control unit configured to control the feed motor, make the pick-up roller feed a first sheet, and change the timing at which the pick-up roller is made to feed a second sheet following the first sheet, based on a signal output from the encoder after the trailing edge of the first sheet passes a separation nip portion.

Sheet feeding apparatus and image forming apparatus

A toner image is formed on a first sheet surface and then heated. A conveyance unit includes a first rotary member configured to contact the first sheet surface and a second rotary member configured to contact a second sheet surface opposite to the first sheet surface. A conveyance guide is provided with an opening through which air is blown to the first sheet surface. The conveyance guide includes a first surface part and a second surface part. The first surface part is disposed on a location in a width direction overlapping with a location in the width direction of the first rotary member. In at least a part of a range between the opening and the first rotary member in the sheet conveyance direction, the first surface part is protruded with respect to the second surface part in a height direction.

Image forming apparatus having a conveyance with air circulating opening

A fixing device includes a cylindrical film a pressing member, and a preventing member including a preventing surface configured to prevent movement of the film in a longitudinal direction, and a film rotation guiding surface. As viewed in the longitudinal direction of the film, the preventing surface includes first and second regions positioned downstream and upstream, respectively, of a nip center line with respect to a recording material feeding direction. The first region retracts from a longitudinal film end surface relative to the second region. The second region continuously extends in the recording material feeding direction from a portion upstream of the nip center line to a portion downstream of the nip center line, and has a length, with respect to a rotational direction of the film, that is greater at the portion upstream of the nip center line than at the portion downstream of the nip center line.

Growing community of inventors

Suntou-gun, Japan

Keita Nakajima