| 摘要 |
<p>An improved pull tab mounting arrangement for an easy open end closure member, characterized by the provision of improved pull tab positioning means for maintaining the pull tab in a desired orientation relative to the panel-defining score line and minimizing tab protrusion from the end closure member. A depression is formed in the end panel and a pierced hole forming a protrusion with a jagged edge is incorporated in the tab nose portion above the depression, between the free extremity of the tab and the rivet means that secures the tab to the end panel member. The jagged protruding edge of the protrusion is driven into the base portion of the depression during the staking operation, thereby providing an anti-rotation interlock between the tab and the end panel. The depression serves as a detent positively restraining rotation of the tab and displacement of the nose relative to the score line. The protrusion, whose length exceeds the depth of the depression, further serves to raise the nose portion of the tab relative to the end panel thereby biasing the tab against the end panel upon staking of the rivet which forces the finger grip portion of the tab into close contact with the end panel.</p> |
