Easily openable fastener tape, packaging bag with easily openable fastener tape, and method of manufacturing easily openable fastener tape
AssigneeIdemitsu Unitech Co., Ltd.
InventorsYoshinori NANBA, Kenichi TANAKA
Life of this patent
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Abstract
A belt-shaped base of a male member of a zipper tape attached on an inner surface of a bag body includes a main body provided with an engagement portion, a thin portion connected to an opening-side of the main body, a thick portion connected to an opening-side of the thin portion and a projecting portion provided on the thick portion. A female member is also provided with the same arrangement. When the zipper tape is fused with the bag body, a gap is provided between the thin portion and a film of the bag body and between the thin portion and a film of a bag body, so that the thin portions are easily bent.
Claims17
An easily openable zipper tape for attachment to an inner surface of a bag body of a packaging bag, the zipper tape comprising:
- an engagement portion in which a pair of a male member and a female member are engaged;
- and
- belt-shaped bases connected with the engagement portion, wherein
- at least one of the belt-shaped bases comprises a main body on which the male or female member is provided,
- a thin portion that is provided only on an opening-side of the main body and is thinner than the main body and bendable, and
- a thick portion that is provided on an opening-side of the thin portion and thicker than the thin portion, and
- surfaces of the main body and the thick portion respectively opposing to the inner surface of the bag body are located on a substantially same plane, and a gap is provided by the thin portion recessed relative to the surfaces.
An easily openable zipper tape suitable for attachment to an inner surface of a bag body of a packaging bag, the zipper tape comprising:
- a pair of a male member and a female member that are engaged to define an engagement portion;
- a first belt-shaped base having a male member side facing the male member and a first side opposite to the male member side;
- and
- a second belt-shaped base having a female member side facing the female member and a second side opposite to the female member side,
- the male member being asymmetric relative to a center axis substantially perpendicular to the male member side to define an opening side, the male member being attached to the first belt-shaped base in a manner that the opening side is adapted to face an opening of the packaging bag, and a content side opposite to the opening side across the center axis, wherein
- at least one of the first and second belt-shaped bases comprises:
- a main body on which the male member or the female member is provided;
- a single thin portion provided only in the opening-side;
- and a thick portion, the single thin portion being interposed between the main body and the thick portion, the single thin portion being thinner than the main body and the thick portion and being bendable, the single thin portion defining a gap which is provided on the first side or the second side,
- a surface of the main body and a surface of the thick portion are located on substantially the same plane, and
- the gap defined by the single thin portion is recessed relative to the surfaces of the main body and the thick portion.
Dependencies are inferred from the claim text.