Abstract: An air-purifying apparatus comprising: a main body having an intake portion and an outlet portion; a blower disposed in the main body and adapted to induce the ambient air through the intake portion and to forward the air to the outlet portion; and a high-voltage generating means mounted in the main body; wherein the intake portion includes a intake grille, first and second net-shaped electrode plates disposed along the inner side of the intake grille and opposing each other with a large potential difference developed therebetween by the high-voltage generating means, the first net-shaped electrode plate being remoter from the intake grille than the second net-shaped electrode plate, and an air-permeable filter made of a dielectric material disposed between the first and second electrode plates, and wherein at least the intake grille and the second net-shaped electrode plate being detachable from the main body.

Abstract: A motion picture projector in which projector mechanisms are incorporated in the body of a carrying case, the opening of which is covered by a panel structure on which a reel setting portion and an operation board are disposed. The panel structure is provided with a projection window through which a light beam from the projector mechanisms is projected. A cover attached to the case body by hinge means is provided in the inside thereof with a rear-projection screen assembly, which is adapted to engage the case body and to be supported in a predetermined angle together with the case cover when unfolded. A light beam from the projection window is reflected by a mirror disposed in the inside of the case cover so as to be projected on the screen assembly. A projector in accordance with the present invention is formed in a readily portable shape and has high versatility because films wound upon usual open-type reels are available. In addition, the projected image is easy to see because of the large screen size.