Separable laminate container
OwnerEdward S. Robbins, IIIinventor
Life of this patent
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Abstract
A process for forming a separable laminate container includes the steps of coextruding at least two substantially non-adhering thermoplastic compositions to form a tubular parison having a relatively thick outer layer and a relatively thin inner layer. The parison is subsequently blow molded and trimmed to provide an open-ended container body and an inner liner which is separable along the interior walls of the container body to permit closing and/or sealing of the liner, independent of the container. A lid may also be applied to the container body.
Claims29
A process for forming, filling and closing a separable laminate container comprising the steps of:
- (a) extruding at least two substantially non-adhering plastic compositions to form a tubular parison having a relatively thick outer layer and a relatively thin inner layer;
- (b) molding said parison within a mold cavity to form a container having side walls, a closed end, and an open end such that said relatively thick outer layer forms a container body and said relatively thin inner layer forms an open ended liner for said container body;
- (c) trimming the molded container, at said open to provide access to said open ended liner.
- (d) filling the open ended liner;
- (e) pulling the liner inwardly away from the side walls of the container body at the open end thereof to at least partially separate the liner from the container body and
- (f) closing the liner at said open end thereof
A process for forming a separable laminate container comprising:
- (a) extruding at least two substantially non-adhering plastic compositions to form a tubular parison having a relatively thick outer layer and a relatively thin inner layer;
- (b) blow molding said parison within a mold cavity formed by split mold halves which are brought together along a mold parting line to clamp said parison therebetween, thereby forming a container having side walls, a closed end and an open end, wherein said relatively thick outer layer forms a container body and said relatively thin inner layer forms an open ended liner for said container body;
- and further wherein the closed end of the container body includes a bottom wall divided into halves along a depending residual tab formed during clamping of said parison by said mold halves, said tab comprising depending outer layer portions separated by a depending inner layer portion;
- (c) reworking said tab to join said divided bottom wall halves;
- (d) filling said container;
- (e) pulling said liner away from said container body portion at the open end thereof sufficient to join opposed peripheral edges of said liner;
- (f) closing said opposed peripheral edges of said liner;
- and
- (g) closing said outer body portion of said container.
Dependencies are inferred from the claim text.