Abstract: A dispenser has, an elongated container having a storage portion for storing material to be dispensed, a female screw member fitted in the interior of the elongated container and held against longitudinal movement therealong, a male screw member having one end engaged with material in the storage portion and rotatably engagable with the female screw member for, when the male screw member is moved within the elongated container, pressing the material and discharging it from the dispenser. An element is connected to the screw members for rotating them relative to each other for axially moving the male screw member relative to the female screw member, and the female screw member has a plurality of parts, at least one of which is threaded, movable inwardly and outwardly of the male screw member for changing the diameter of the female screw member for engaging the female screw member with and releasing it from the male screw member.

Abstract: A liquid dispenser according to the present invention comprises a container having a rigid top portion and an elastic bag portion, an actuator having a cylindrical portion engageable with the top portion of the container, a pair of flexible legs each having a bent portion and a valve aperture, and a valve device having a valve stem extending longitudinally in the container. The valve stem is engaged with the flexible legs at their ends. A spring is mounted between the actuator and the valve device for biasing the valve device to a closed portion. When pressure is applied manually onto a predetermined portion of the container, the flexible legs are actuated to move the valve out of its closed position so that a liquid in the container is discharged through the opened valve aperture.