Abstract: A method of electrostatic printing from a master constituted by a sheet of material bearing an image to be duplicated, in which the image area of the master has an electrical resistivity which is substantially greater than that of the background area. The method comprises mounting the master on a rotating cylinder and, during each of a series of successive cycles of operation, applying toner powder to the electrically charged image areas of the master, traversing the master by rotation of the cylinder to a station at which it contacts successive portions of a transfer sheet which is pressed against the master by a charge transfer roller connected to a source of electrical potential such that the toner is transferred to the transfer sheet and the image is recharged upon separation of the transfer sheet from the master, and thereafter fixing the toner powder to the transfer sheet.

Abstract: A self storing fire escape ladder of foldable type, including a plurality of pivotally interconnected rung sections and enlarged hook means for engaging a window sill or similar structure during use. The hook means is of effective width less than that of the rung sections, and so contoured that when the rung sections are folded against each other to form a compact unit, the hook means may at least partially encircle the rung sections to hold them in mutually folded relation and form carrying handle means. Optional latching means is provided to prevent movement of the hook means relative to the compact unit when the former is employed as a carrying handle.