Patent ID: 7419301

Claim:
A package comprising a receptacle having a mouth at an upper end, a flexible zipper attached to said mouth and comprising first and second fastener strips, a slider movably mounted to said zipper for alternately opening or closing portions of said first and second fastener strips depending on the direction of movement of said slider relative to said zipper, said slider having a top at a first elevation and a bottom at a second elevation lower than said first elevation, and a header enclosing said zipper and said slider, wherein said header comprises first and second side edges and first and second walls each extending from said first side edge to said second side edge, said first wall of said header comprising: a first line of weakness having a straight portion parallel to said zipper when said zipper is straight, said first line of weakness extending across said header at a third elevation that is lower than said second elevation; and a first slit defined in said first header wall by a pair of internal edges of equal length and separated by substantially no gap when said internal edges lie in a plane, said internal edges meeting at first and second termination points at opposite ends of said first slit, said first termination point being at a fourth elevation higher than said first elevation, and said second termination point being at a fifth elevation lower than said second elevation and at or near said third elevation.