| 摘要 |
<p>Dispensing of fluid doses from a container is achieved using a dose dispenser having a cylindrical dosing chamber located in the outlet neck of the container. The container is inverted and squeezed to cause a piston slideable within the dosing chamber to slide, under the influence of fluid pressure, from the inlet end to the outlet end of the dosing chamber. Fluid is drawn into the rear volume of the dosing chamber behind the piston through the open inlet. An inlet closure member closes the inlet just before the piston reaches the outlet to define a measured dose of fluid. Continued movement of the piston to the outlet allows fluid filling the rear volume to flow out of the outlet to be dispensed. The piston is reciprocable for multiple dose dispensing. The dosing chamber may be formed integrally with the container neck and this may be done in moulding a preform for a blow-moulded container.</p> |
