Method for producing a container intended to contain a substance to be dispensed by an airless pump, and a container produced by the method

摘要

A method for producing a container intended to contain a substance to be dispensed by an airless pump, having an external body inside which a bag is provided formed of thermoplastic material, the bag presenting, at least at a connection surface between its neck and its lateral surface, controlled deformation zones arranged to guide the bag deformation in accordance with preferential directions. The invention also relates to a container formed by the described method and a bag with the aforedescribed characteristics.

主权项

1. A container for containing a substance to be dispensed by an airless pump, comprising
an external rigid body inside which a bag is provided formed of thermoplastic material having substantially the shape of an inner cavity of the rigid body, and also provided with a neck having a flange projecting radially from one end thereof, the neck, at that end opposite the end at which the flange is present, being connected to a lateral surface of the bag, said lateral surface comprising a closure bottom, the bag presenting, at least at a connection surface between the bag's neck and the bag's lateral surface, controlled deformation zones arranged to guide the bag deformation in accordance with preferential directions pertaining to preferential longitudinally axial planes, wherein at least a central portion of the lateral surface is free from said controlled deformation zones, wherein the closure bottom presents further controlled deformation zones arranged to guide the bag deformation in accordance with further preferential directions, wherein said controlled deformation zones or said further controlled deformation zones are defined by protuberances which project from the connection surface between said lateral surface and the neck, said preferential deformation planes passing external to said protuberances, wherein the controlled deformation zones are arranged on at least a portion of an external edge of the connection surface between the neck of the bag and the lateral surface of the bag.