Device for packaging and dispensing a liquid or semi-liquid substance

摘要

A device for packaging and dispensing a liquid or semi-liquid substance includes a receptacle suitable for containing the substance. The receptacle has a substance outlet orifice fitted with a pump including a valve suitable for enabling the substance to be delivered without ingress of air. The receptacle also includes a bottom wall constituted by a bag that defines a space inside the receptacle and contains the substance. The bag is capable of moving inside the receptacle in response to the substance being delivered so as to reduce the volume of the space and to ensure that the substance stored inside the receptacle does not come into contact with air. A margin at one end of the bag is fixed to the receptacle and the bag is suitable for deforming so as to reduce the space until the bag coincides substantially with the inside shape of the receptacle. The bag is made of a material that is elastically deformable.