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    • 26. 发明授权
    • Method and apparatus for forming element-free spaces in slide fastener
chains
    • 用于在拉链链条中形成无元件空间的方法和装置
    • US4638542A
    • 1987-01-27
    • US623116
    • 1984-06-22
    • Hideki AkiyamaShigeru Imai
    • Hideki AkiyamaShigeru Imai
    • A44B19/58B23P11/00
    • A44B19/58Y10S83/921Y10T29/49782Y10T29/5101Y10T29/53309
    • A punch blade depresses the coupling heads of a length of successive filamentary coupling elements toward a knockout blade while sandwiching stringer tapes between upper and lower grippers. The punch blade is lowered until lower legs of the coupling elements are cut off by cutter blades. The punch blade and the knockout blade are then lifted while gripping the severed coupling elements therebetween to forcibly remove the coupling elements out of engagement with sewing threads on the stringer tapes. The upper grippers have confronting steps for engaging the sewing threads so that the severed coupling elements can be detached reliably and smoothly from the stringer tapes without unduly tensioning the sewing threads and stringer tapes. The punch blade may have a vertical reinforcement member attached to at least one side edge thereof and having a lower tooth projecting downwardly beyond a lower edge for being pressed against the coupling elements. The lower tooth enters between adjacent coupling elements to position the coupling elements against unwanted longitudinal displacement with respect to the punch blade.
    • 冲压刀片将连续的长丝连接元件的连接头部朝向脱模刀片压下,同时将纵梁夹在上下夹爪之间。 冲压刀片降低,直到联轴器元件的下腿被切割刀片切断。 然后在夹持切断的联接元件之间抬起冲头刀片和脱模刀片,以强制地将联接元件脱离与纵梁上的缝合线接合。 上夹具具有用于接合缝纫线的面对的步骤,使得切断的联接元件可以在不过分地张紧缝纫线和纵带的情况下从绳带被可靠地平稳地分离。 冲压刀片可以具有附接到其至少一个侧边缘的垂直加强构件,并且具有向下突出超过下边缘的下齿,以压靠联接元件。 下齿进入相邻的联接元件之间,以使联接元件抵抗相对于冲头刀片的不期望的纵向位移。