Abstract: A method and apparatus for burning a liquid fuel by introducing gas into the liquid fuel through capillaries, a porous plate, cloth, a particle layer or the like to bubble the liquid fuel to control the fuel level and simultaneously by supplying combustion air separately to accomplish complete combustion.

Abstract: A method for burning foamed liquid fuel in a combustion chamber comprises the steps of foaming the liquid fuel and separately supplying air required for continuous stable combustion of the foamed fuel. An apparatus for carrying out the method is also disclosed.

Abstract: An image forming method of the present invention comprises: a first toner image formation process for forming a first toner image by forming, on a latent image carrier, a first latent image which corresponds to a first image and developing the first latent image by a first toner charged to one polarity through a development process selected from normal and reverse development process selected from normal and reverse development processes so as to correspond to the polarity of the first toner; a second toner image formation process for forming a second toner image by forming, on the latent image carrier, a second latent image which correspond to a second image and developing the second latent image by a second toner charged to the other polarity by the other development process while applying a developing bias; and a transfer treatment process for simultaneously transferring said first and second toner images to a transfer medium; wherein said developing bias VB2 satisfies the following equations:.vertline.

Abstract: Image recording method of the present invention comprises the steps of forming electrostatic latent image on a latent image carrier by a latent image forming means, developing the formed electrostatic latent image with toner, and transferring the visualized toner image to a transfer material after repeating at least the developing step plural times, wherein double-element developer formed from mixing toner and magnetic carrier with its density of 4.0 g/cm.sup.3 or less is used in at least the second and the succeeding developing steps among the plural times of the developing steps.