Abstract: A method is provided for separating gaseous or vaporous substances, especially isotopes, with different molecular weights and/or different gas kinetic cross sections, in which the mixture of substances to be separated is passed through separation nozzles. One of more skimmer diaphragms project into the flow path of the substances and are used to separate and remove fractions of different compositions, and several separation systems consisting of nozzles and skimmer diaphragms are arranged in a cascade. The cascade generates partial streams which contain the mixture of substances to be separated. The partial streams can contain an additional gas with each partial stream containing different fractions of additional gas.

Abstract: A control device for the lateral stop on the feed table of a sheet feed device includes a control shaft mounted for axial displacement and rotary movement. A cam along with an operating lever and an actuating means are operable to effect the axial displacement and rotary movement of the control shaft whereby the lateral stop mounted on the control lever is raised and lowered relative to the feed table when the control shaft is rotated and the lateral stop is moved laterally when the control shaft is axially displaced.