Bag with attached zipper tape, manufacturing method of bag with attached zipper tape
AssigneeIdemitsu Unitech Co., Ltd.
InventorTakumi Todaka
Life of this patent
Estimating the term…
Abstract
In order to allow a bag to be easily unsealed by sliding both sides of the bag in a longitudinal direction of a zipper tape irrespective of the rigidity of the zipper tape, a zipper-tape bag according to an aspect of the invention includes: a bag body including at least a pair of facing surfaces; and an elongated zipper tape whose cross sectional profile includes first and second bases each bonded to corresponding one of facing surfaces, and mutually engageable first and second engagement portion respectively protruded from the first and second bases, the zipper tape including an intermediate hinge at at least one point in the longitudinal direction.
Claims14
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.
A manufacturing method of a zipper-tape bag, the method comprising:
- feeding an elongated zipper tape whose cross sectional profile comprises:
- first and second bases;
- and mutually engageable first and second engagement portions respectively protruded from the first and second bases;
- bonding the first and second bases respectively on a pair of mutually facing films;
- and
- bonding the films with each other to form a bag body, wherein
- the method further comprises forming an intermediate hinge 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 a pair of facing surfaces of the bag body 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.
Dependencies are inferred from the claim text.