A sheet conveyance apparatus includes a drive source, a conveyance portion, a transmission mechanism configured to switch between a first state and a second state, a load detection portion configured to detect a load acting on the drive source, and a control portion configured to control the drive source and the transmission mechanism. The control portion is configured to change, on a basis of a detection result of the load detection portion, a timing in the conveyance operation at which a control signal for switching the transmission mechanism from the first state to the second state is issued, the timing being changed in accordance with a delay time from when the control signal is issued to when change in the load corresponding to the switching of the transmission mechanism from the first state to the second state appears.

The present disclosure provides a consumable chip, a consumable, and a communication method between the image forming apparatus and the consumable chip. The consumable chip is capable of being installed on the consumable, and the consumable is capable of being detachably installed on the image forming apparatus. The consumable chip includes a first storage unit and a chip control unit. The first storage unit is configured to store first fixed data representing attribute information of the consumable. The chip control unit is configured to receive an authentication request sent by the image forming apparatus, obtain the first fixed data and first variable data representing consumption information of the consumable, generate authentication data by performing a calculation on the first fixed data and the first variable data according to a first preset algorithm, and send the authentication data for determining whether the consumable meets expectation to the image forming apparatus.

An image forming apparatus includes: a setting unit configured to set an operation mode; and a processing unit configured to perform image processing on image data according to the operation mode. In a case where a first mode is set, the image processing includes determining, in the image data, one or more target pixels having a gradation value equal to or higher than a first threshold value, and one or more adjacent pixels that are different from the one or more target pixels and adjacent to the one or more target pixels, setting a first gradation value lower than the first threshold value as a gradation value of the one or more target pixels, and setting a second gradation value higher than the first gradation value as a gradation value of the one or more adjacent pixels.

An image forming apparatus includes an image forming section, a display section, and a controller. The image forming section forms an image on a recording medium. The display section displays a message to a user. The controller controls operation of the display section. In causing the display section to display a remaining amount display icon indicating a remaining amount display bar with a length that represents a remaining amount of a consumable used in the image forming section, the controller causes the display section to display in an enlarged size the remaining amount display icon indicating the remaining amount display bar with a length corresponding to a maximum remaining amount and continuously changes the length of the remaining amount display bar from the length corresponding to the maximum remaining amount to a length corresponding to a current remaining amount.

A temperature detection section is disposed opposite to a heater so as to be out of contact with the heater, and detects a temperature of the heating element. A spacer is disposed so that the heater and the temperature detection section are out of contact with each other. The spacer includes a separator that separates the temperature detection section from the heater and that has a gap through which the heat is transferred from the heater to the temperature detection section and that melts upon the temperature of the heating element increasing to a specific temperature or higher. The separator after melting fills the gap.

A sheet feeding apparatus includes an apparatus body including an opening portion, a storage configured to store a sheet, a pickup roller configured to pick up and feed the sheet, a separation conveyance unit including a separation nip, and a guide member including a guiding surface configured to guide the sheet such that the sheet passes under an upper edge of the opening portion while the storage is being drawn out of the apparatus body. A downstream end of the guiding surface in a sheet feeding direction is positioned downstream of the separation nip in the sheet feeding direction. An upstream end of the guiding surface in the sheet feeding direction is positioned upstream in the sheet feeding direction of a leading-edge position of the sheet stored in the storage.

An image forming apparatus is configured to control a generation circuit to modulate a DC component of a developing voltage based on a first correction component such that a density unevenness is reduced. The image forming apparatus is further configured to restrict the first correction component for modulating the DC component of the developing voltage such that fogging of toner that may occur on a non-exposure region which is not exposed by an exposure unit and adhesion to a photosensitive member of carrier included in a developer are reduced.

A sheet feeding device includes a sheet feeding portion, a side end regulating portion, a feeding portion, first and second feeding roller pairs, an abutment member, an obliquely feeding roller pair, and first and second contact-and-separation mechanisms. Feeding of a long sheet is stopped after the sheet is fed to an upstream side of the second feeding roller pair by the feeding portion, and then is resumed in a state in which the first feeding roller pair is changed from a separated state to a feedable state and in a state in which the obliquely feeding roller pair is put in a separated state, and then the sheet is fed to the second feeding roller pair. A short sheet fed by the first feeding roller pair is obliquely fed by the obliquely feeding roller pair and then is fed to the second feeding roller pair.

An image forming apparatus includes a first unit, a second unit fixed to the first unit at a portion upstream of the first unit in a conveyance direction in which the sheet is conveyed, and an electric board. In the image forming apparatus, a disposition of the electric board is restricted by the first unit and the second unit.

A sheet storage apparatus includes a sheet housing portion, a handle for drawing the sheet housing portion, and a cover member. The sheet housing portion is drawably disposed in the apparatus main body and configured to house a sheet. The cover member is mounted to an end portion of the sheet housing portion in a drawing direction and having, in a portion facing the handle, a recess toward a sheet housing portion. A contact portion configured to come into contact with the sheet housing portion is disposed at a position corresponding to a portion in which the recess is formed, on a facing surface of the cover member, the facing surface facing the sheet housing portion.