Patent ID: 11897662
Assignee: IDEMITSU UNITECH CO., LTD.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A zipper-tape bag comprising:
a bag body comprising at least a pair of facing surfaces; and
an elongated zipper tape whose cross sectional profile comprises:
first and second bases each bonded to corresponding one of the pair of facing surfaces; and
mutually engageable first and second engagement portions respectively protruded from the first and second bases, wherein

at least one intermediate hinge is provided on at least one point of the zipper tape in a longitudinal direction of the zipper tape, and wherein
the intermediate hinge is provided such that the first engagement portion near the intermediate hinge is bent away from the second engagement portion when the pair of facing surfaces are oppositely slid along the longitudinal direction of the zipper tape, and
wherein an engagement strength when the first and second engagement portions are mutually engaged is 26 N/50 mm or more.