JPH0546748U - Bag with zipper - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a zippered bag that has a clean front side and does not waste materials. [Structure] The height of the front side 1a of the bag body 1 is extended to be substantially the same as the height of the zipper tape 4, and the front side 1a is sealed higher than the articulation tool 5. [Effect] Since the sealing after filling the contents is performed at a higher level than the articulation tool 5, the hanger holding the bag body 1 does not get in the way and it is not necessary to have a large space in the mouth portion. There is no waste of material and the front side of the bag is wide, so the appearance (design) is beautiful.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bag in which a zipper is attached to the mouth of a bag (container) having an arbitrary shape and the bag can be sealed again after opening.

[0002]

[Prior Art]

 As a bag having a zipper in its mouth, that disclosed in Japanese Patent Application Laid-Open No. 1-226556 is known. The bag of this known example has a U-shaped so-called zipper tape which is partly inserted into the mouth of the bag so that it is abutted, and only one of the front side and the back side of the bag is sealed in advance. It is a structure to seal and seal the unsealed side after filling with, and to prevent the zipper from being damaged by opening and closing the zipper and filling the contents, and then closing the zipper again. The effect is recognized in that it can do this.

[0003]

[Problems to be solved by the device]

 However, in the case of the above bag, since the part near the mouth of the bag is sandwiched by the hanger when automatically filling the contents, this hanger interferes when trying to heat seal the unsealed part later. There is a problem that the heat seal bar does not work. Of course, there is no problem if the hanger and the heat seal bar have a sufficient working range, but if this is done, a wasteful space is created at the mouth of the bag and the material (film) is consumed depending on the application. Not only is the volume increased, but the size of the automated machine becomes larger and the appearance of the bag is not good.

It is an object of the present invention to provide a zipper-equipped bag that is efficient in the use of materials, can reduce the size of an automatic machine, and has a good appearance.

[0005]

[Means for Solving the Problems]

 The construction of the zipper bag according to the present invention is as follows.

When the zipper tape formed in a U shape is attached to the mouth of the bag body, the back side of the bag body seals below the zipper tape's fastener, and the back side of the bag body engages the zipper tape. A zippered bag with a structure that seals higher than the tool.

[0007]

[Action]

 The zipper tape is bent into a U-shape, and the clasp is closed so that the zipper tape faces the inside of the bag body so as to face each other, and only the back side of the bag body is heat-sealed at the lower part in advance. Next, the front side of the unsealed bag body is opened, and the contents are loaded from here. Next, the zipper tape and the front side of the bag main body are heat-sealed at the upper edge of the front side of the bag main body or a portion close to the upper edge of the front side of the clasp. By forming a zipper tape or a plastic layer having a melting point lower than that of the inside of the zipper tape on the front side or the heat-sealed portion of the zipper tape, it is possible to prevent the zipper tapes from being sealed with each other during the heat sealing. Alternatively, instead of heat sealing, sealing may be performed with an adhesive applied beforehand.

When the bag is opened, the bag is cut at the front seal portion of the bag body or at the upper portion thereof. In this way, the U-shaped sealing portion of the zipper tape is opened, and then the articulation device is opened by a known means, the contents are taken out, and the sealing is performed again.

[0009]

【Example】

 1 and 2 show a bag with a zipper according to the present invention. 1 is a bag main body, 2 is this mouth, 3 is a zipper, and this zipper 3 has a zipper tape 4 on the inner surface of which an articulation device 5 consisting of a concave line and a convex line is formed, which is bent in the middle to form a U-shape. The upper edge 6'of the back side 1b of the bag body 1 and the lower edge 4'of the zipper tape 4 are partially lapped and abutted together while the interlocking device 5 is occluded. The upper edge 6 of the front side 1a of the bag body 1 is extended to the same height as the upper end 7 of the zipper tape 4 in an unsealed state.

FIGS. 3 to 6 show the steps of filling the contents into the bag and hermetically sealing the bag. As shown in FIG. 3, the mouth of the bag body 1 is opened by, for example, vacuum, and as shown in FIG. The mouth of the hopper 8 is inserted, the contents 9 are put into the bag body 1 from the hopper 8 as shown in FIG. 5, and then the heat seal bars 10 and 10 'are used to insert the upper edge 6 on the front side 1a of the bag body 1. And the upper end of the zipper tape 4 near the bent portion are sandwiched and heat sealed with a width L. This situation is shown in FIG. To open the package, cut the line XX 'in FIG. The opened condition is shown in FIG. However, FIG. 8 shows a state in which the occluding tool 5 of the zipper 3 is also opened.

[0011]

[Effect of the device]

 The zipper bag according to the present invention is configured as described above and has the following effects.

A. Even if a portion near the mouth of the bag body is sandwiched by hangers during automatic filling, the heat-sealing of the unsealed portion is performed above the engaging device, so there is no problem with the operation of the heat-seal bar. As a result, there is no waste of material (film).

B. The automatic machine (filling machine) can be downsized and productivity can be improved.

C. Since the front side of the bag body positions the entire zipper on the back side, the zipper is hidden behind the bag, and the bag is wide in the direction of the arrow in FIGS. 2, 7, and 8, that is, when viewed from the front, the design is wide. It will also be excellent.

[Brief description of drawings]

FIG. 1 is a front view of a bag according to the present invention.

FIG. 2 is a sectional view taken along the line AA ′.

FIG. 3 is an explanatory view of a state in which the mouth of the bag is opened.

FIG. 4 is an explanatory view of a situation in which a hopper is inserted into a bag mouth.

FIG. 5 is an explanatory view of a situation where contents are being loaded from a hopper.

FIG. 6 is an explanatory view of a situation immediately before heat sealing the mouth of the bag.

FIG. 7 is an explanatory view of a state in which the mouth of the bag is heat-sealed and hermetically sealed.

FIG. 8 is an explanatory view of a state in which the bag is opened.

[Explanation of symbols]

 1 bag main body 1a front side 1b back side 2 mouths 3 zipper 4 zipper tape 5 zipper tape 6, 6'upper edge 7 upper end 8 hopper 9 contents 10, 10 'heat seal bar

Claims (2)

[Scope of utility model registration request] 1. When mounting a U-shaped zipper tape in the mouth of the bag body, the back side of the bag body is sealed below the fastener of the zipper tape, and the back side of the bag body is covered with the zipper tape. A zipper bag with a structure that seals above the bite. 2. The bag with a zipper according to claim 1, wherein a cut line is set in a seal width which is provided at a level higher than that of the engaging device.