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    • 9. 再颁专利
    • Buckle resistance for metal container closures
    • 金属容器封闭件的扣环阻力
    • USRE33217E
    • 1990-05-15
    • US235787
    • 1988-08-19
    • Tuan A. Nguyen
    • Tuan A. Nguyen
    • B21D51/38
    • B21D51/383B65D17/165
    • The present invention relates to improvements in the strength of ends used on metal beverage containers.Such ends generally comprise a central panel portion of a substantially planer character, a surrounding U-shaped sidewall having inner and outer legs, a curved intermediate portion integrally joining the inner leg to the U-shaped sidewall, and a peripheral curl extending from the outer leg for double seaming the end onto a can body.In accordance with the present invention, the intermediate portion and adjacent central panel portion are firmly supported by a die while a clamping force is placed on an annular band of the upper surface of the end at the intermediate portion. The clamping force is increased until metal flows inwardly and outwardly from the contact point resulting in a free compression doming of the center panel and an outward deflection of the inner leg. An end of increased buckle resistance is thereby produced which end is approximately within standard dimensions such that customers can use the end on existing seaming equipment without alteration. An optional feature is provided to minimize the compression doming by clamping a peripheral band of the end with a hold-down pad while the metal flowing is accomplished. This reduces the dome depth and results in a strengthened end having a dome depth very close to standard specifications.
    • 10. 发明授权
    • Metal closure with circumferentially-variegated strengthening
    • 金属封闭带周向杂色强化
    • US4796772A
    • 1989-01-10
    • US183498
    • 1988-04-14
    • Tuan A. Nguyen
    • Tuan A. Nguyen
    • B65D8/08
    • B65D17/165
    • A metal closure for beverage containers of the type having a center panel, a center-panel ring, an inner leg, and a pull-tab opener, includes circumferential variegations for increasing the buckling pressure of the container. The circumferential variegations are cold-worked or coined into the center-panel ring and/or into portions of the closure that are adjacent to the center-panel ring. The circumferential variegations include coined surfaces with variegated lengths, variegated coin angles, variegated coin residuals, variegated spaces between coined surfaces, or variegated widths of the center panel. The circumferential variegations achieve non-axisymmetric doming of the metal closure and increase the buckling pressure of the closure by obviating excess metal in the center panel that typically results from scorning the center panel for the easy open end.
    • 用于具有中心面板,中心面板环,内腿和拉片开启器的类型的饮料容器的金属封闭件包括用于增加容器的压曲压力的周向杂色。 周向杂色被冷加工或者制成中心面板环和/或封闭件与中心面板环相邻的部分。 周向杂色包括具有杂色长度的多面体硬币角,多余的硬币残留物,多面体硬币残留物之间的多面体空间,或中心面板的杂色宽度。 周向杂色实现金属封闭件的非轴对称拱顶,并且通过消除中心面板中的多余金属来增加封闭件的翘曲压力,这通常是由于中心面板的烧焦导致容易的开口端。