A reclosable plastic zipper assembly of indefinite length is disclosed, the assembly including a ribbon having a first zipper strip profile and a second zipper strip profile, where the first zipper strip profile includes at least one rib, and where the second zipper strip profile includes at least one recess. The at least one rib and at least one recess are complementary in shape such that the zipper strip profiles may be mated by inserting the at least one rib into the at least one recess along the length of the plastic zipper assembly. The reclosable plastic zipper assembly further includes a bead and a pair of perforations, where the zipper strip profiles may be mated by folding the ribbon along the length of the plastic zipper assembly around the bead, where a first perforation is on the ribbon between the bead and the first zipper profile, and the second perforation is on the ribbon between the bead and second zipper profile, wherein the zipper assembly has been extruded through a single die. A bag having the aforementioned zipper assembly mounted thereon is also disclosed, as well as a method of manufacturing the aforementioned zipper assembly.

The present disclosure relates to spaced multi-rib zippers, reclosures or closures for flexible packaging, wherein openings or lines of weakness are created between rows of mating elements.

In a packing bag to store a stored article Z with tight seal by a welded sheet material 1, a separation-prepared line portion 5, separable by predetermined tensile force by human hands, is provided, and, the separation-prepared line portion 5 is composed of half-cut laser-worked grooves 7 disposed parallel with a small interval and concaved on an inner face 1a and an outer face 1b.

A tamper evident structure (10) for flexible packages is disclosed to include a slider-zipper assembly (100) and a tamper evident diaphragm (200). The slider-zipper assembly includes a slider (102) engaged with a zipper (104). The zipper includes a longitudinal male element (106) engageable to a longitudinal female element (108), a first flap (114) and a second flap (116) extending downwardly along the respective length from the longitudinal male and the longitudinal female element. Further, the tamper evident diaphragm includes a plurality of temperature sensitive ribs (202) configured along the length on an outer surface thereof, and a pressure sensitive weak line (204) configured centrally along the length of the tamper evident diaphragm. The tamper evident diaphragm is sealed to the zipper in such a manner that a first end portion and a second end portion of the tamper evident diaphragm is respectively sealed to the first flap and the second flap, forming the tamper evident structure for the flexible packages.

A package is provided to make it more resistant to access by individuals, such as small children, while remaining simple enough for an adult to open. A feature, such as a top gusset or a breachable flange or flap, can be provided to promote the child resistance attributes of the package.