Plastic package with fastener

Details Plastic package with fastener Plastic package with fastener

1999-03-30

2001-06-12

Garbe, Stephen P. (Department: 3727)

Flexible bags

Bag having means to facilitate opening it by severing bag...

Including means for reclosing the bag

C383S061100, C383S095000, C383S210000

Reexamination Certificate

active

06244748

ABSTRACT:

TECHNICAL FIELD
The present invention relates to a plastic package with a fastener applicable to common packing material such as foods and drinks, pharmaceuticals, stationery, mechanical parts, electronic parts or the like, and in particular to a plastic package with a fastener having excellent filling, opening and resealing characteristics even if the content is liquid, and excellent pressure resistance that enables a large volume of contents to be filled, as well as, excellent transportation stability and shelf-life.
BACKGROUND ART
In filling a content, for example a liquid, into a conventional plastic package with a fastener by using an automatic plugger, an inlet portion of the package is heat-sealed leaving a bottom portion of the package open, the content is filled from the bottom portion and the bottom portion is heat-sealed to ensure complete sealing of the packing and protect the fastener. For easy opening, a notch for cutting with scissors, perforation, or tape for tearing is provided at an upper portion of the heat-sealed inlet portion.
As described above, the content has to be filled from the bottom portion of the conventional plastic package with the fastener to prevent the content from attaching to the fastener and catching in groove of the fastener, and to keep the package quality from being degraded by the contents which are tacky or putrescent and colored.
On the other hand, a large volume plastic package such as a gusseted bag, a standing pouch, a laminated paper pack, a thermoplastic resin and the like are rarely used as a plastic package with a fastener because the contents cannot be filled from a bottom portion in view of the structure thereof and have to be filled from an inlet side of the package, and the fastener becomes contaminated. Accordingly, most conventional plastic packages with a fastener are flat bags having a small volume.
An easy to open package without a fastener has problems in terms of its transportation stability, shelf-life or the like because an inlet portion thereof is easily opened by internal pressure, thus limiting its usage. This phenomenon is especially apparent in a large volume package having a large ratio of content volume/packing material area. Yet, durability against internal pressure and easy to open characteristic cannot be compromised.
Consequently, there is a need for a large volume plastic package with a fastener having a large ratio of content volume/packing material area such as a gusseted bag, a standing pouch, a paper pack or the like, while being easy to open, capable of being resealed and not easily opened at the inlet portion by internal pressure.
An object of the present invention is to provide a plastic package with a fastener having excellent filling, opening and resealing characteristics even if the content is liquid and excellent pressure resistance that enables filling a large volume of contents, as well as, excellent transportation stability and shelf-life.
DISCLOSURE OF THE INVENTION
Through the intensive research of the present inventors, the above-described conventional problems have been solved.
According to the present invention, a plastic package with a fastener having a flexible package body and a sealing sheet disposed in an internal portion of the package body, wherein a first side of the package body and the sealing sheet are capable of being opened and closed by the fastener made of plastic at an inlet portion of the package body, and a second side of the package body and the sealing sheet are sealed and the first side of the package body and the sealing sheet are bonded by a peelable bonding portion at a side of the package that is more inside than the plastic fastener is provided.
In addition, according to the present invention, a plastic package with a fastener having a flexible package body and a sealing sheet disposed in an internal portion of the package body, wherein a first side of the package body and the sealing sheet are capable of being opened and closed by the fastener made of plastic at an inlet portion of the package body, and a second side of the package body and the sealing sheet are sealed and the first side of the package body and the sealing sheet are bonded by a peelable bonding portion at a side of the package more external than the plastic fastener is provided.
Furthermore, according to the present invention, a plastic package with a fastener having a flexible package body and a sealing sheet disposed in an internal portion of the package body, wherein a first side of the package body and the sealing sheet are capable of being opened and closed by the fastener made of plastic at an inlet portion of the package body, and a second side of the package body and the sealing sheet are sealed and the first side of the package body and the sealing sheet are bonded by peelable bonding portions at more external and internal sides of the package than the plastic fastener is provided.
According to the plastic package with the fastener of the present invention, the peelable bonding portion is disposed parallel to the plastic fastener.
Also according to the plastic package with the fastener of the present invention described above, a tear line is disposed between the plastic fastener and a seal which is between the first side of the package body and the sealing sheet.
Yet further, according to the plastic package with the fastener of the present invention described above, a distance between the plastic fastener and the peelable bonding portion, which is disposed at a more internal or external portion of the package than the plastic fastener, is at least 0.5 mm.
According to the plastic package with the fastener of the present invention described above, the second side of the package body and the sealing sheet are sealed at a portion that is at least 2 mm above (upper outlet side) an end of a contents side (lower) of the peelable bonding portion which is disposed at a more internal or external portion of the package than the plastic fastener.
Additionally, according to the plastic package with the fastener of the present invention described above, the plastic package with the fastener is a gusseted bag, a standing pouch or a laminated paper pack.
Moreover, according to the present invention, a method for filling contents into a plastic package with a fastener comprises the steps of: filling the contents from an inlet side of the plastic package with the fastener and sealing a second side of a package body and a sealing sheet.


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