Abstract: The open end of a dust bag in an upright tank type vacuum cleaner is detachably fastened to a frame fitting within and against the upper face of a ledge in the tank. A deflector skirt spaced from the tank wall is fitted against the lower face of the ledge and the frame and skirt are held against the ledge from opposite sides by spring catches mounted on the inside surface of the deflector skirt and engaging the frame. Those catches are accessible from the bottom of the deflector skirt when the dump bucket forming the bottom portion of the tank is removed.