US 11,305,916 B2Granted

Zipper tape, bag, and method for producing bag

AssigneeIdemitsu Unitech Co., Ltd.

InventorTakumi Todaka

Life of this patent

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Abstract

A zipper tape includes a pair of belt-shaped bases bondable to a film of a bag body, and mutually engageable engagement portion each integrally provided to corresponding one of the belt-shaped bases. One of the belt-shaped bases includes at least two portions having different bonding strengths to the film on a side opposite a side provided with the engagement portion and between an edge of the one of the belt-shaped bases in a width direction orthogonal to a longitudinal direction to a point at which the engagement portions are provided. A bonding strength of a first portion of the at least two portions to the film may be larger than a bonding strength of a second portion to the film.

Claims7

Dependent claims

A zipper tape comprising:

a first belt-shaped base and a second belt-shaped base;
and
a first engagement portion and a second engagement portion being provided integrally with the first and second belt-shaped bases respectively and being mutually engageable with each other, wherein
at least two layers are provided on a side of the first belt-shaped base opposite the side provided with the first engagement portion, the at least two layers comprising a first layer made of a first resin composition and a second layer made of a second resin composition different from the first resin composition,
each of the first and second layers continuously extend in a longitudinal direction of the first belt-shaped base, and
in a width direction of the first belt-shaped base the first layer is formed in a region between an edge and a first position while the second layer is formed in a region between the first position and a second position of the first engagement portion.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/132,298Filed 23 Dec 2020 · division
Priority: JP 2016-0020517 Jan 2016
Published: US 2021/0107703 A115 Apr 2021
Granted: 19 Apr 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B65D 33/2508
Riveting; Dovetailing; Screwing; using press buttons or slide fasteners: using slide fasteners with interlocking members having a substantially…
A44B 19/16
With a one-piece interlocking member on each stringer tape: interlocking member having uniform section throughout the length of the stringer
B65D 33/2541
Using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor:…
B65D 81/3415
For packaging foodstuffs or other articles intended to be cooked or heated within the package: specially adapted to be heated in hot water, e.g.…

Family

PCT/JP2017/000146Parent of this division · filed 5 Jan 2017
US 2021/0107703 A1Pre-grant publication · published 15 Apr 2021
Application16/068,533Parent of this division
US 10,906,701 B2Parent of this division
US 2019/0016507 A1Published application
US 11,305,916 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

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