Beverage composite carton

WO2026150120A1PCT designated stage Publication Date: 2026-07-16ALPLA WERKE ALWIN LEHNER

Patent Information

Authority / Receiving Office: WO · WO
Patent Type: Applications
Current Assignee / Owner: ALPLA WERKE ALWIN LEHNER
Filing Date: 2026-01-12
Publication Date: 2026-07-16

AI Technical Summary

Technical Problem

Existing beverage carton closures with plastic pouring spouts and caps fail to meet the 'break then leak' market requirement due to premature leakage during opening, despite attempts to enhance sealing through stiffening and extending the sealing lip, which complicates manufacturing and reduces user-friendliness.

Method used

The inner diameter of the neck is designed to be smaller at the upper end than in the lower areas, forming a continuous upwardly tapered internal cone, ensuring the sealing lip is pressed against the neck during unscrewing, and the inner and outer cones interact to enhance the seal without requiring excessive force.

Benefits of technology

This design effectively prevents leakage during opening while maintaining ease of use, as the seal is strengthened throughout the process, meeting the 'break then leak' requirement with simple manufacturing and minimal additional effort.

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Smart Images

Figure EP2026050579_16072026_PF_FP_ABST

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Abstract

The invention relates to a beverage composite carton (11) comprising a body (13) for receiving a filling material, the shell of which body consists of a plastics-laminated carton and a closure (15) made of plastics material, the closure having a pouring element (17) which is fastened to the body (13), has a neck (21) with an upper and a lower end (23a, 23b) and has an external thread (25), and having a closure cap (19) for closing a pouring opening (27) provided within the neck (21). The closure cap (15) comprises a circular head plate (29), a cylindrical threaded part (31) which surrounds the head plate (29) and has an open edge (33) and an internal thread (35) which interacts with the external thread (25) of the pouring element (17), and a circular sealing shoulder (37) which protrudes on the inner side of the head plate (29), has an open end (39) and sealingly interacts with the inner side (41) of the neck (21) preferably under preload. The inner diameter of the upper end (23a) of the neck (21) is smaller than the inner diameter (43) in the region between the thread (25) and the lower end (23b) or in the region of the rest of the neck (21).

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