Patent 7647883 was granted and assigned to Panasonic on January, 2010 by the United States Patent and Trademark Office.
A fluid supply apparatus is provided for feeding a fluid to two faces relatively moving in a clearance direction, a continuous flow supplied from the fluid supply apparatus is converted to an intermittent flow by utilizing pressure change caused by a fluctuation of a clearance space of the relative moving faces, and an intermittent discharge quantity per dot is adjusted by the number of revolutions of the fluid supply apparatus.