Canon Kabushiki Kaisha

Yoshiteru Kaida

Eiichiro Teshima

Takashi Kuwata

Hiroki Sasaki

Shoichi Koyama

Satoshi Tsuda

Yasuhiko Fuse

Yasuharu Hirado

An image forming apparatus includes a stacking portion including a lifting portion, a feeding member feeding a sheet stacked on the lifting portion to a conveyance passage, a position detector detecting movement of the sheet stacked on to a feedable position to the conveyance passage, a driver including a motor and performing the lifting operation of the lifting portion, a rotation detector detecting rotation of the motor, and a controller. The controller determines a factor that the position detector does not detect the movement of the sheet stacked on the lifting portion to the feedable position within a predetermined time based on a detection result of the rotation detector while controlling the driver to lift up the lifting portion.

Image forming apparatus

In a case in which an image forming apparatus determines that a replaceable unit is replaced in a first state, in which removal of the replaceable unit is inhibited, the image forming apparatus performs control to switch from the first state to a second state, in which removal of the replaceable unit is allowed.

The image forming apparatus includes a cartridge replaceable by detachably mounting to the image forming apparatus, a door that takes a closed state or an open state, a locking pin that switches a state of the regulation unit between a regulating state in which the replacement unit is prevented to be detached from the image forming apparatus and a release state in which the replacement unit is to be detachable from the image forming apparatus, and a lock control unit (a control unit) that makes a determination as to whether or not the state of the regulation unit is to be switched from the release state to the regulating state, at a predetermined timing when initial processing is completed after a power source is turned on or a state of the door becomes the closed state from the open state.

Image forming apparatus that controls regulation unit

Image forming apparatus with control of replacement of process cartridge

Image forming apparatus that controls regulation unit to prevent or allow detachment of a cartridge mounted to the image forming apparatus

An image forming apparatus includes a feeding unit, a detection unit provided downstream of the feeding unit, a measurement unit that measures a measured time from the start of conveyance of a recording material to the detection of the recording material, and a determination unit that performs renewal determination for determining whether the feeding unit has been replaced with a new feeding unit. Thus, replacement of the feeding unit with a new feeding unit can automatically be detected.

Image forming apparatus selectively restricting removal of cartridge

Image forming apparatus that controls regulation unit to switch regulating state of a detachable replacement

An image forming apparatus includes a body having an opening, an image forming unit, storage units that can store a sheet, and a moving unit provided in each storage unit. The moving unit moves the stored sheet and then stops it in an exposed state where the sheet is partly exposed, from the opening, to a body outside. Where a first sheet and a second sheet, stored in a storage unit different from where the first sheet is stored, contact and then are exposed to the outside, when a first sheet moving distance to the exposed state and a second sheet moving distance to the exposed state are different, the moving unit changes a first sheet movement start timing relative to that of the second sheet or changes a first sheet moving speed relative to that of the second sheet, based on moving distances of the first and second sheets.

Image forming apparatus that ejects printed sheets from multiple trays at the same time

An image forming apparatus includes an image forming station for forming an unfixed image on a recording material; a fixing portion for heating and fixing an unfixed image formed on the recording material, the fixing portion including a fixing rotatable member, and a pressing roller cooperative with the fixing rotatable member to form a nip for nipping and feeding the recording material; an ambient condition sensor for detecting an ambient temperature and an ambient humidity; and a controller for controlling the fixing portion; wherein the controller sets such a warming-up time for warming up the fixing portion that a temperature of the pressing roller at the time when the recording material enters the nip is a temperature calculated on the basis of the ambient temperature and the ambient humidity.

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Numazu, Japan

Yoshiteru Kaida