| 摘要 |
A composite container, comprising a form-retaining outer container and a flexible inner container is presented. The inner container comprises a dispensing opening and can be mounted in a neck of the outer container, and the inner container is further connected to the outer container by an adhesive or weld connection over a portion of its periphery. The adhesive or weld connection can take the form of a ring adhesion or weld extending transversely to a central longitudinal axis of the container, or can cover the entire surface area of a defined portion of the respective inner container and outer container walls, such as, for example, the upper one-half of the container. The adhesion or weld can be substantially permanent, or alternatively, the adhesive or weld connection can be adapted to detach in controlled manner under the influence of pressures occurring in the container. Additionally, a method for manufacturing such a composite container is also presented, including forming a form-retaining outer container pre-form comprising a neck, forming a flexible inner container pre-form comprising a dispensing opening, inserting the inner container pre-form into the outer container pre-form and fixing said inner container pre-form to the neck of the outer-container pre-form. If the two containers are to be connected by adhesive, then prior to inserting the inner container pre-form into the outer container pre-form, a glue or adhesive can be applied either to the outer surface of the inner container pre-form or to the inner surface of the outer container pre-form, defining a portion of the surface area of the inner and outer containers where they will be connected. Once the two pre-forms are assembled, the composite container can be blown to full size under significant pressures, and the inner container becomes connected to the outer container over the defined portion of their periphery (e.g., their upper halves) by the adhesive spreading under such pressure, or by welding, into an air-tight seal In exemplary embodiments of the present invention, the remaining portion of the inner container pre-form can be coated with an anti-stick coating prior to insertion into the outer container pre-form, so as to facilitate motion of the remaining portion of the flexible inner container relative to the outer container. In exemplary embodiments of the present invention, in operation, under pressure supplied by a displacing medium, the non-adhering portion of the inner container moves upwards within the outer container in a piston-like motion so as to dispense a product provided inside it, until it has completely folded on itself so that it its inner wall fully contacts the inner wall of the adhering portion of the inner container. |
