Abstract: A collapsible wall closure for a dispenser nozzle comprised of a stiff but resilient tube section adapted to be bent over and latched in the bent position to provide a fluid tight closure of the nozzle by collapse of the tube wall. The interior of the nozzle tube is undercut in the region of the wall collapse on either side of the tube along the fold line of the tube, in order to provide complete sealing collapse of the tube wall in the bent position. The undercuts are comprised of shallow grooves extending axially along the tube interior thinning the tube wall thickness in the region of the wall collapse. A pair of closures are incorporated in a cap closure particularly adapted to an ammonia hydroxide container for connection to vapor-type diazo reproduction machines.

Abstract: A bin for storing and discharging free-flowing granular material, such as sugar, has a cup-shaped bag with a dual flexible wall for holding the material and a discharge opening in its bottom resting on a flat floor. Fluid under pressure between the flexible walls causes the inner wall to expand and discharge the material that would otherwise remain after assuming its angle of repose. The upper inner wall of the cup-shaped bag is provided with slack in the flexible wall above the angle of repose, and is anchored at the bottom of its side walls. The bin is also provided with a back-up outside wall.