Composite container

The composite container design addresses deformation and airtightness issues by using a resin frame with specific thread and rib configurations, ensuring airtightness and reducing resin use.

JP2026095922APending Publication Date: 2026-06-12TOPPAN HOLDINGS INC
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
TOPPAN HOLDINGS INC
Filing Date
2024-12-02
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing composite containers with reduced resin content suffer from deformation of the paper cylindrical body, leading to distorted openings and impaired airtightness due to reduced roundness, resulting in gaps and potential leakage.

⚗Method used

A composite container design with a resin frame forming an annular and side frame, joined to a paper side portion, featuring a threaded portion with specific thickness and positioning relationships, and incorporating reinforcing ribs and protrusions to maintain roundness and airtightness.

🎯Benefits of technology

The design ensures stable capping and airtightness by preventing sink marks from coinciding with the sealing point, maintaining roundness, and reducing resin usage to less than half of conventional containers.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a composite container that reduces the amount of resin used while offering excellent airtightness when the lid is closed. [Solution] A bottomed cylindrical composite container 1 made primarily of paper and having an opening 5 on its top surface, comprising: a resin frame 10 having an annular frame 20 forming the opening 5 and a side frame 30 connected to the annular frame 20; a paper side 60 joined to the annular frame 20 and the side frame 30; and a threaded portion 21 provided on the annular frame 20 having outwardly protruding threads 25, wherein when the thickness of the threads 25 in the lead direction is X and the thickness of the opening 5 is Y, the condition X ≤ Y ···(1) is satisfied, the threading start position S of the threads 25 is set a certain distance or more from the end of the opening 5, and the top surface side of the threads 25 is cut flat.
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