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    • 9. 发明申请
    • FLAT BOTTOMED PLASTIC BAG
    • 平底塑料袋
    • WO99064307A1
    • 1999-12-16
    • PCT/US1999/012195
    • 1999-06-01
    • B29C65/00B29C65/18B29C65/76B31B37/00B65D30/20B65D30/18B65D30/22B65D33/14
    • B65D31/10B29C65/004B29C65/18B29C65/76B29C66/1122B29C66/137B29C66/232B29C66/4312B29C66/43129B29C66/4322B29C66/72328B29C66/80B29C66/81422B29C66/81427B29C66/8322B29C66/8432B31B2150/00B31B2150/0012B31B2150/003B31B2160/106B31B2160/20
    • An expandable plastic film gusseted bag in which each front panel gusset (64, 66) is connected to a rear panel gusset and each of the panel gussets is foldable between the front panel (63) and the rear panel to provide a continuous bag periphery. A bottom joins the bottom of the front panel, rear panel, two rear panel gussets and two front panel gussets at substantial right angles to the side edges of the front panel, rear panel, and gussets to close the bottom of the bag and leave only the top (62) open. The improvement provides the plastic bag with eight first linear folding axes adjacent the bottom. A linear folding axis is located within the front panel, each front panel gusset, the rear panel, and each rear panel gussets. Each folding axis extends from the joinder of a gusset at the bottom to a side edge of the front panel or the rear panel and the front panel gusset or the rear panel gusset at an approximate 45 DEG angle. The folding axes are made by a process restricted to a group consisting of a cold seal and a hinge in the plastic film while the film is planar. On opening of the expandable gusseted bag, the bottom seal of the bag disposed adjacent the gussets forms a generally triangular shaped overlay relative to the gussets to form a flat bottom bag.
    • 一种可膨胀塑料薄膜角撑板,其中每个前板片角撑板(64,66)连接到后面板角撑板,并且每个面板角撑板可在前面板(63)和后面板之间折叠以提供连续的袋周边。 底部与前面板,后面板和角撑板的侧边缘基本成直角地连接在前面板,后面板,两个后面板角撑板和两个前面板角撑板的底部,以封闭袋子的底部,仅留下 顶部(62)打开。 该改进提供了塑料袋,其具有邻近底部的八个第一线性折叠轴。 线性折叠轴位于前面板,每个前面板角撑板,后面板和每个后面板角撑板中。 每个折叠轴线从底板的角撑板的连接处延伸到前面板或后面板以及前面板角撑板或后面板角撑板的大约45度角的侧边缘。 折叠轴线由薄膜平面的限制于塑料薄膜中的冷封和铰链组成的组合制成。 在打开可膨胀角撑袋时,邻近角撑板设置的袋的底部密封件相对于角撑板形成大致三角形的覆盖物,以形成平坦的底部袋。