A positional deviation correction pattern includes a first and second pattern image portions adjacent in a sub-scanning direction at the same position in a main-scanning direction, with the same width in the main-scanning direction. Each image portion includes a first side extending in the sub-scanning direction, a second side continuing from one end of the first side and extending in a direction intersecting the sub-scanning direction, and a third side continuing from the other end and extending in a direction intersecting both the sub-scanning direction and the second side. The second sides have the same inclination angle to a virtual line parallel to the main-scanning direction. The third sides have the same inclination angle to the virtual line. A length of one image portion in the sub-scanning direction gradually increases from one end to the other end in the main-scanning direction, a length of the other image portion gradually decreases.

An image forming apparatus includes a fixing unit, an image reading unit, and a control unit. The fixing unit includes a first roller, a second roller, and a displacement mechanism that displaces at least one of the first roller and the second roller to form a nip portion. The image reading unit includes a scanning mechanism that scans by moving a carriage where a light source is mounted. The control unit executes a driving of the scanning mechanism and a driving of the displacement mechanism at different times.

An image forming apparatus includes a fixing unit, an image reading unit, and a control unit. The fixing unit includes a first roller, a second roller, and a displacement mechanism that displaces at least one of the first roller and the second roller to form a nip portion. The image reading unit includes a scanning mechanism that scans by moving a carriage where a light source is mounted. The control unit executes a driving of the scanning mechanism and a driving of the displacement mechanism at different times.

A reading device and an image forming apparatus are provided. The reading device includes an image reading device configured to read an image on a recording medium being conveyed, a background device serving as a background image when the image is read by the image reading device, and a foreign-object detector configured to compare a first read image obtained as the background device is read by the image reading device with a second read image obtained as the background device and the recording medium are read by the image reading device to detect an attached foreign object. The image forming apparatus includes the reading device and an image forming device.

A sheet conveyance apparatus includes a conveyance roller, a first rotary member forming a first nip portion conveying a sheet in a first conveyance direction, a rotation axis of the first rotary member being inclined with respect to a rotation axis of the conveyance roller such that a center of one end of the first rotary member is positioned at a different position in the first conveyance direction with respect to a center of the other end, and a second rotary member forming a second nip portion conveying a sheet in a second conveyance direction, a rotation axis of the second rotary member being inclined with respect to the rotation axis of the conveyance roller such that a center of one end of the second rotary member is positioned at a different position in the second conveyance direction with respect to a center of the other end.

A sheet conveyance apparatus includes a conveyance roller, a first rotary member forming a first nip portion conveying a sheet in a first conveyance direction, a rotation axis of the first rotary member being inclined with respect to a rotation axis of the conveyance roller such that a center of one end of the first rotary member is positioned at a different position in the first conveyance direction with respect to a center of the other end, and a second rotary member forming a second nip portion conveying a sheet in a second conveyance direction, a rotation axis of the second rotary member being inclined with respect to the rotation axis of the conveyance roller such that a center of one end of the second rotary member is positioned at a different position in the second conveyance direction with respect to a center of the other end.

An image forming apparatus includes an image forming unit configured to form an image on a sheet based on image data, a control unit configured to control driving of the image forming unit, and a power supply unit configured to, if a factor for shifting from a power saving state to a standby state is detected, supply power to the image forming unit and the control unit. If a first type of factor is detected as the factor in the power saving state, the power supply unit supplies power to the control unit and the image forming unit, and the control unit restricts the driving of the image forming unit. If an instruction to perform a function of forming an image on a sheet is accepted, the control unit cancels restriction of the driving of the image forming unit.

An image forming apparatus includes an image forming unit configured to form an image on a sheet based on image data, a control unit configured to control driving of the image forming unit, and a power supply unit configured to, if a factor for shifting from a power saving state to a standby state is detected, supply power to the image forming unit and the control unit. If a first type of factor is detected as the factor in the power saving state, the power supply unit supplies power to the control unit and the image forming unit, and the control unit restricts the driving of the image forming unit. If an instruction to perform a function of forming an image on a sheet is accepted, the control unit cancels restriction of the driving of the image forming unit.

A sheet conveyance apparatus includes a conveyance roller, a first rotary member forming a first nip portion conveying a sheet in a first conveyance direction, a rotation axis of the first rotary member being inclined with respect to a rotation axis of the conveyance roller such that a center of one end of the first rotary member is positioned at a different position in the first conveyance direction with respect to a center of the other end, and a second rotary member forming a second nip portion conveying a sheet in a second conveyance direction, a rotation axis of the second rotary member being inclined with respect to the rotation axis of the conveyance roller such that a center of one end of the second rotary member is positioned at a different position in the second conveyance direction with respect to a center of the other end.

A sheet conveyance apparatus includes a conveyance roller, a first rotary member forming a first nip portion conveying a sheet in a first conveyance direction, a rotation axis of the first rotary member being inclined with respect to a rotation axis of the conveyance roller such that a center of one end of the first rotary member is positioned at a different position in the first conveyance direction with respect to a center of the other end, and a second rotary member forming a second nip portion conveying a sheet in a second conveyance direction, a rotation axis of the second rotary member being inclined with respect to the rotation axis of the conveyance roller such that a center of one end of the second rotary member is positioned at a different position in the second conveyance direction with respect to a center of the other end.