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    • 3. 发明授权
    • Packaging bag and manufacturing method thereof
    • 包装袋及其制造方法
    • US08500330B2
    • 2013-08-06
    • US12069070
    • 2008-02-07
    • Tadashi NomuraMasakazu Sato
    • Tadashi NomuraMasakazu Sato
    • B65D33/02B65D30/16B65D30/00
    • B65D33/02B29C45/14065B29C45/14336B29C45/14811B29C65/70B29C66/1122B29C66/43B29C66/53263B29C66/7392B29C2045/14122B29L2031/7128B65D75/008B65D75/5866
    • A packaging bag is provided with a bag body and thermoplastic resin-made reinforcing members provided at the outer edge of the bag body. A window is provided in each reinforcing member. In forming the packaging bag, the bag body is placed between a pair of molds respectively having recesses to clamp these two molds so that a corresponding pair of the recesses are opposed to each other. Thereafter, in order to form the reinforcing members at the outer edge of the bag body, melted or softened thermoplastic resin is injected to fill cavities formed by the recesses of the thus clamped molds. Each of the cavities of the molds is formed so as to coincide with an outer shape of the corresponding reinforcing member. A projection extends from the bottom face of each recess at a part of the cavity corresponding to a part of each reinforcing member on which the window is provided. The outer edge of the bag body placed between the two molds is placed inside the cavities in a state of being held between the two projections.
    • 包装袋设置有袋体和设置在袋体外缘的热塑性树脂加强件。 在每个加强构件中设置有窗口。 在形成包装袋时,将袋体放置在分别具有凹部的一对模具之间以夹持这两个模具,使得相应的一对凹部彼此相对。 此后,为了在袋体的外缘形成加强构件,注入熔融或软化的热塑性树脂以填充由这样夹紧的模具的凹部形成的空腔。 模具的每个空腔形成为与相应的加强构件的外部形状一致。 突起从凹部的底面延伸到空腔的与设置有窗口的每个加强构件的一部分相对应的部分。 放置在两个模具之间的袋体的外边缘处于保持在两个突起之间的状态下的空腔内。