Abstract: An image forming apparatus has: a photosensitive cartridge; a development cartridge detachably mounted to the photosensitive cartridge; a main body in which the photosensitive cartridge is detachably mounted; a first sensor; a second sensor; and a control unit. Where the second sensor is brought into a second state after being temporarily brought into a first state, it is determined that the development cartridge is a new one. Where the second sensor is in the first state and the first sensor receives light within a predetermined period of time, it is determined that both the development cartridge and the photosensitive cartridge are not mounted Where the second sensor is in the first state, and the first sensor does not continuously receive the light for a predetermined period of time, it is determined that the photosensitive cartridge is mounted and the development cartridge is not mounted.

Abstract: An image forming apparatus has: a photosensitive cartridge; a development cartridge detachably mounted to the photosensitive cartridge; a main body in which the photosensitive cartridge is detachably mounted; a first sensor; a second sensor; and a control unit. Where the second sensor is brought into a second state after being temporarily brought into a first state, it is determined that the development cartridge is a new one. Where the second sensor is in the first state and the first sensor receives light within a predetermined period of time, it is determined that both the development cartridge and the photosensitive cartridge are not mounted Where the second sensor is in the first state, and the first sensor does not continuously receive the light for a predetermined period of time, it is determined that the photosensitive cartridge is mounted and the development cartridge is not mounted.

Abstract: An image forming apparatus includes a first fan and a second fan that are configured to generate air in a main body of the apparatus, a controller configured to control operations of the fans, and a detector configured to detect a malfunction of a first fan. When the detector detects the malfunction of the first fan, the controller increases a voltage applied to the second fan as compared with that before the malfunction is detected.

Abstract: A channel member for constructing an elongated wall portion of a vehicle body, having, as viewed in the cross section, first and second side wall portions (12B) extending substantially perpendicularly to a direction of transverse extension of the elongated wall portion so as to define opposite sides of the channel member, first and second bottom wall portions (12F) extending substantially in parallel with the direction of transverse extension of the elongated wall portion and connected with the first and second side wall portions (12B) along adjacent ends thereof, first and second perpendicular intermediate wall portions (12G) extending substantially transversely to the direction of transverse extension of the elongated wall portion and connected with the first and second bottom wall portions (12F) along adjacent ends thereof, and a central wall portion (12E) extending between the first and second perpendicular intermediate wall portions (12G) and connected with the first and second perpendicular intermediate

Abstract: A channel member for constructing an elongated wall portion of a vehicle body, having, as viewed in the cross section, first and second side wall portions (12B) extending substantially perpendicularly to a direction of transverse extension of the elongated wall portion so as to define opposite sides of the channel member, first and second bottom wall portions (12F) extending substantially in parallel with the direction of transverse extension of the elongated wall portion and connected with the first and second side wall portions (12B) along adjacent ends thereof, first and second perpendicular intermediate wall portions (12G) extending substantially transversely to the direction of transverse extension of the elongated wall portion and connected with the first and second bottom wall portions (12F) along adjacent ends thereof, and a central wall portion (12E) extending between the first and second perpendicular intermediate wall portions (12G) and connected with the first and second perpendicular intermediate