Abstract: A dispensing device is adapted to dispense metered amounts of a liquid substance from a pouch (10) made from a pair of superposed flexible sheets. The pouch defines a liquid containing chamber (15-17) and a narrow liquid discharge passage (18) communicating with the chamber at a junction position (34) and being self-sealing at that position. The device comprises liquid discharge mechanism (23, 27) for applying a pressure to the liquid substance present in the lower part of the chamber (16). The liquid discharge mechanism comprises a devices (31) for applying an inwardly directed pressure to a pouch wall closely adjacent to the junction position (34) so as to increase the angle (62) defined between the pouch wall and the plane at right angles to the longitudinal axis (13) of the discharge passage (18), whereby the discharge passage (18) may be opened.

Abstract: The invention relates to a diaphragm pump for dispensing or metering purposes, for example for use in liquid soap dispensers. The pressure chamber (7) of the pump is defined by a fixed wall (6) and the diaphragm (1). A check-valve on the inlet side towards a storage vessel (11) forms a cylindrical flange (4) movable in a groove (5) and sealing against the outer surface thereof. Arranged in a spout (2) passing through the diaphragm is an oblique wall (3), which is slotted through a short distance around its periphery, thereby to form a seal against the suction of air into the pressure chamber (7). The diaphragm (1) is arranged to be compressed by a pressure body (9) provided on a lever (8).