A suction nozzle and a head of a cleaner having the same includes a suction hole to which a suction force is applied; an air channel formed as a closed region having predetermined area and depth and having the suction hole therein; and scraper longer than an end of an edge of the air channel, positioned in the air channel, and for scraping carpet fibers in cleaning a carpet. In one embodiment, a gear arrangement is operatively connected to a top drive of the top drive system to increase the amount of available torque for rotating a tubular. A resonant frequency of the sensor is modulated by altering the spacing or gap between the coils or altering the overlapping area of the coils. The image forming apparatus further comprises a photoreceptor. The cutting apparatus is capable during a second print job of cutting second images of the fixed image length into second printed products for delivery to the first delivery and the second delivery. In a disk device for recording data on an optical disk by using a phase change recording scheme, erasing means for erasing data on the optical disk, and recording means for recording other data on the optical disk after the data is erased are provided.