Abstract: A fluid discharge head according to an embodiment includes abase including a plurality of first grooves disposed side by side in a first direction and a plurality of second grooves disposed side by side in the first direction and respectively disposed among the plurality of first grooves, an individual wire including individual electrodes formed in the second grooves, the individual wire being extended to one side in a second direction crossing the first direction, a common wire including common electrodes formed in the first grooves, the common wire being extended to the other side in the second direction, a connection wire connected to the common wire on the other side in the second direction and leading to the one side, and a nozzle plate including nozzles that communicate with the first grooves of the base.

Abstract: The light sensor apparatus uses a light-emitting element which irradiates light on a detection area and a light-receiving element which receives light from the detection area. The light-receiving element sets the threshold level to an intermediate level between an output level when a detection target object exists within the detection area and an output level when the detection target object does not exist within the detection area. As a result of this, the threshold level is constantly set to a level in compliance with the detection target object such as a paper, a mark, or the like.

Abstract: A delivery device comprises a frame to be fitted to the main body of an image forming apparatus carrying an image recording mechanism mounted therein and provided with a delivery port and a delivery mechanism for delivering sheets of recording paper along a delivery route to the outside through the delivery port, a sheet delivery mechanism arranged in the frame for sending out the sheets of recording paper discharged from the delivery port of the main body in a predetermined direction, a sheet detection sensor arranged along the sheet transfer path in the main body for detecting a sheet of recording paper and a delivery drive directing circuit for directing the sheet delivery mechanism to be driven on the basis of the detection output of the sheet detection sensor. The delivery drive directing circuit is arranged in the main body.