发明名称 Offset sealing method for plastic films
摘要 A reclosable package includes two sheets of a first polymeric resin material facing one another and forming a package opening having an inside and an outside. A first zipper strip having a male zipper profile and a first flange area, and a second zipper strip having a female zipper profile and a second flange area, are extruded from a second polymeric resin material. The first flange area is sealed to the first sheet with a first seal on the outside of the package opening, and the second flange area is sealed to the second sheet with a second seal on the outside of the package opening. The first and second seals are offset from one another relative to the male and female zipper profiles, so that the first and second seals are not in a back-to-back relationship with respect to one another.
申请公布号 US5875611(A) 申请公布日期 1999.03.02
申请号 US19980131298 申请日期 1998.08.10
申请人 ILLINOIS TOOL WORKS INC. 发明人 PLOURDE, ERIC P.
分类号 B31B19/90;B65B61/18;(IPC1-7):B65B61/18 主分类号 B31B19/90
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