학술논문
Composite vessel lid
Document Type
Patent
Author
Source
Subject
Language
Abstract
Disclosed is a composite vessel lid comprising an outer lid of a plastic material to be engage with a neck of a vessel and an inner lid of a thin metal sheet held within the outer lid. Fine projections are formed at predetermined intervals in the abutting portion between the outer and inner lids, and a gas-releasing path is formed among the fine projections.
Since the gas-releasing path is not formed in a portion engaging with a vessel, such as a screwed portion of the outer lid, the engaging force is not reduced and the strength of the outer lid is not reduced, and release of gas is promptly accomplished effectively at the initial stage of opening.
Since the gas-releasing path is not formed in a portion engaging with a vessel, such as a screwed portion of the outer lid, the engaging force is not reduced and the strength of the outer lid is not reduced, and release of gas is promptly accomplished effectively at the initial stage of opening.