SIMPLIFIED UNIDIRECTIONAL TWIST-UP DISPENSING DEVICE WITH INCREMENTAL DOSING

摘要

An unidirectional twist-up dispensing device (10) with incremental dosin g for dispensing a product is provided. This twist-up dispensing device includ es a hollow housing (20) defining a chamber (21) having an open dispensing end (2 4) and an open actuating end (26) having an interior surface. A piston (40) located within the chamber being limited to translational movement within the chambe r. The piston having a top side (42) facing the dispensing end (24) of the housing forming a variable volume portion of the chamber for storing the product. Th e piston also having a threaded rod (46) extending therefrom opposite the top side. An actuator (50) having a threaded aperture therethrough that engages the interior surface of the actuating end of the housing is also provided. The threaded aperture is concentric in the actuator and the actuator is adapted to rotate with respect to the housing in only one direction. The threaded rod engages the threaded aperture such that advancement of the piston toward the dispensing end occurs when th e actuator is rotated, thereby causing the product to be dispensed. An applicator (80) can be attached to the dispensing end of the housing in fluid communication with the variable volume portion (22) of the chamber wherein the product is dispensed through the applicator. The applicator comprises a ferrule (82) and an application portion (84). The ferrule is attached to the dispensing end of the housing a nd the application portion has at least one orifice located therein. Several versio ns of the applicator are illustrated, including a fiber brush and a flocked applicatio n surface.