Improved container, sheet material and joining element for such container, and machine and methods for manufacturing them

The sheet material design insulates the conductive layer from the container contents using heat-sealing layers, addressing weld failure and contamination issues, while enabling continuous production of durable containers.

WO2026047591A2 Publication Date: 2026-03-05BANDINI ROMEO
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Patent Information

Application Number
PCT/IB2025/058687
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-08-29
Filing Date
2025-08-28
Publication Date
2026-03-05

AI Technical Summary

Technical Problem

Existing containers for food or beverages have conductive layers that come into contact with the contents, leading to deterioration, weld failure, and potential release of substances into the food or beverage, while production is intermittent due to the need for temporary stops during the application of joining elements.

Method used

A sheet material design where the conductive layer is insulated by heat-sealing layers, with excess heat-sealing material covering the perimeter edge to prevent contact with the contents, and a method involving compression during welding to ensure complete insulation and seamless welding without interruptions.

Benefits of technology

The solution provides a durable container with sealed welds that are not affected by the contents, ensuring product safety and continuous production without interruptions.

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Abstract

An improved container has a perimeter wall (3), consisting of at least one sheet material (51) having a support means (52), the perimeter wall (3) defining an internal volume (4) of the container and being welded at least by electromagnetic induction at at least one welding portion (55) of the support means (52) provided with at least one joining element (57) for induction welding. For each joining element (57) adjacent to the internal volume (4) of the container (1), a first adhesive layer (71) and a second adhesive layer (72) on each side of a median conductive layer (59) of the joining element (57) are mutually connected at at least one portion of the perimeter edge (63) of the conductive layer (59) adjacent to the internal volume (4) of the container (1), insulating the conductive layer (59) from the internal volume (4).
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