Container with a synthetic lining impermeable to liquids and method of making

US4256231A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien (Henkel KGAA) · DE

Inventors

• Alexander Cioc · Düsseldorf, DE
• Werner Kunzel · Langenfeld, DE
• Klaus Meyer · Kaarst, DE

Key dates

• Filing date: Dec 28, 1978
• Grant date: Mar 17, 1981
• Expiry date: Dec 28, 1998

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C2049/2404
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A container comprising a non-deformable shell under ordinary stresses made from at least two cooperating parts which together constitute said shell, said shell being lined internally with and thermoplastically fused with a lining made of a liquid-impermeable thermoplastic material and a method of making said container, comprising PA1 (a) introducing at least two cooperating parts which together constitute a non-deformable shell under ordinary stresses into molding tool members which each have a contour corresponding to at least a portion of the outer surface of each part of the shell, PA1 (b) bringing the parts together, PA1 (c) applying a substantially even film of thermoplastic material at an elevated temperature and in an at least plastic state to the inner surface of the parts to produce on the internal surface of the wall of the shell a lining, which is liquid-impermeable and thermoplastically fused to the shell when the container is at ambient temperature, and PA1 (d) removing the container from the molding tool members.