TWI889105B - Paper container with inner film layer - Google Patents

Abstract

A paper container with an inner film layer comprises a box body and an inner film layer. The box body comprises a bottom wall and a plurality of side walls extending upward from the periphery of the bottom wall. The bottom wall and the side walls cooperate to define a containing space. One of any two adjacent side walls has at least one connecting wall portion, the connecting wall portion is located in the containing space, the connecting wall portion is formed with at least one first attachment through-hole, and abuts against the inner side surface of the other of the any two adjacent side walls. The inner film layer is attached to the inner surface of the box body and comprises at least one first sinking portion, the first sinking portion sinks into the first attachment through-hole of the connecting wall portion of the one of the any two adjacent side walls, and is attached to the inner side surface of the other of the any two adjacent side walls.

Description

Paper container with inner film layer

The present invention relates to a paper container, in particular to a paper container with an inner film layer.

As shown in FIG. 1 , a known paper lunch box includes a box body 1 and a coating 2 formed on the inner surface of the box body 1. The box body 1 includes a bottom wall 101, two first side walls 102 extending upward from the bottom wall 101 and spaced apart from each other, and two second side walls 103 extending upward from the bottom wall 101 and spaced apart from each other. Each first side wall 102 has two connecting wall portions 104 respectively abutting against the second side walls 103. The bottom wall 101, the first side walls 102 and the second side walls 103 can cooperate to define a containing space 105. In actual manufacturing, the connecting wall portion 104 of each first side wall 102 is firstly fixed to the corresponding one of the second side walls 103 by using glue, and then, after the box body 1 is manufactured, the coating 2 for waterproofing/oil-proofing is formed on the inner surface of the box body 1 by coating. However, in actual use, due to the limited structural strength of the coating 2, the edge seepage problem of food juice often occurs at the joint between the outer contour 106 of the connecting wall portion 104 of each first side wall 102 and the corresponding one of the second side walls 103. In addition, using glue to fix the connecting wall portion 104 of each first side wall 102 not only increases the manufacturing process, but also increases the manufacturing cost.

As shown in FIGS. 2 and 3 , in order to improve the above-mentioned problem, some practitioners replace the coating film 2 with an inner film layer 3 , adhere the inner film layer 3 to the inner surface of the box body 1 , and no longer use glue to adhere the connecting wall portion 104 of each first side wall 102 .

When the inner film layer 3 is attached to the inner surface of the box body 1 by heating and pressurizing, the inner film layer 3 can force the outer side surface of each connecting wall portion 104 to abut against the inner side surface of one of the corresponding second side walls 103. However, since the outer side surface of each connecting wall portion 104 and the inner side surface of one of the corresponding second side walls 103 are only simply abutted against each other, Within the range covered by the wall portion 104, the inner film layer 3 is separated by each connecting wall portion 104 and cannot have any connection relationship with the second side walls 103. Therefore, if the paper lunch box is subjected to pressure during use, each connecting wall portion 104 may be easily pushed away from the corresponding one of the second side walls 103, causing the inner film layer 3 to be accidentally damaged.

Therefore, an object of the present invention is to provide a paper container with an inner film layer that can overcome at least one disadvantage of the prior art.

Therefore, the paper container with an inner film layer of the present invention comprises a box body and an inner film layer.

The box body includes a bottom wall and several side walls extending upward from the periphery of the bottom wall. The bottom wall and the side walls cooperate to define a accommodating space. Any two adjacent side walls have at least one connecting wall portion, which is located in the accommodating space. The connecting wall portion is formed with at least one first attachment through hole and abuts against the inner side surface of the other of the two adjacent side walls.

The inner film layer is attached to the inner surface of the box body and includes at least one first sunken portion, which is sunken into the first attachment through hole of the connecting wall portion of one of the two adjacent side walls and attached to the inner surface of the other of the two adjacent side walls.

The paper container with an inner film layer of the present invention comprises a box body and an inner film layer.

The box body includes a bottom wall and several side walls extending upward from the periphery of the bottom wall. The bottom wall and the side walls cooperate to define a accommodating space. Any two adjacent side walls have at least one connecting wall portion, which is located outside the accommodating space and abuts against the outer side surface of the other of the two adjacent side walls. The other of the two adjacent side walls is formed with at least one first attachment through hole corresponding to the connecting wall portion.

The inner film layer is attached to the inner surface of the box body and includes at least one first sunken portion, which is sunken into the first attachment through hole of the other of any two adjacent side walls and attached to the inner side surface of the connecting wall portion of one of the any two adjacent side walls.

The effect of the present invention is that: the present invention utilizes the design that the first attachment through-hole is formed on the connecting wall to match the first sunken portion of the inner membrane layer. Within the range covered by the connecting wall, the first sunken portion of the inner membrane layer can be attached to the inner side surface of the other of any two adjacent side walls through the first attachment through-hole of the connecting wall, so as to increase the connection between the inner membrane layer and the any two adjacent side walls. The mutually adhering area and adhesive force between the other side walls allow the connecting wall portion to be more firmly pressed against the other of any two adjacent side walls. Thus, even if the present invention is subjected to pressure during use, it can effectively prevent the connecting wall portion from being pushed away from the other of any two adjacent side walls, thereby avoiding the problem of accidental damage to the inner membrane layer.

Before the present invention is described in detail, it should be noted that similar components are represented by the same reference numerals in the following description.

4, 5, and 6, which are a first embodiment of a paper container 100 with an inner film layer of the present invention, the paper container 100 comprises a box body 10 and an inner film layer 20. In the first embodiment, the material of the box body 10 is paper, and the material of the inner film layer 20 is PE.

The box body 10 includes a bottom wall 11 and four side walls extending upward from the periphery of the bottom wall 11, wherein two of the side walls disposed opposite to each other are each defined as a first side wall 12, and the other two side walls disposed opposite to each other are each defined as a second side wall 13, and the bottom wall 11, the first side walls 12 and the second side walls 13 cooperate to define a containing space 14.

Each first side wall 12 is adjacent to the second side walls 13 and has two connecting wall portions 121. The connecting wall portion 121 of each first side wall 12 is located in the accommodating space 14. Each connecting wall portion 121 is formed with a first attachment through-hole 122. Each connecting wall portion 121 has an inner fold 123. The first attachment through-hole 122 is adjacent to the inner fold 123. The connecting wall portion 121 of each first side wall 12 is against the inner side surface of the adjacent second side wall 13. In the first embodiment, the first attachment through-hole 122 is oblong.

As shown in Figures 5, 6, and 7, the inner film layer 20 is attached to the inner surface of the box body 10 and includes four first sunken portions 21, which respectively correspond to the first attachment through holes 122 of the connecting wall portions 121 of the first side walls 12. The first sunken portions 21 are respectively sunken into the first attachment through holes 122 of the connecting wall portions 121 of the first side walls 12 and attached to the inner surfaces of the second side walls 13.

In the first embodiment, the inner film layer 20 can be attached to the inner surface of the box body 10 by heating and pressurizing, but the present invention is not limited thereto.

Thereby, the paper container 100 can be used by the user to fill food, and the inner film layer 20 can prevent liquid from penetrating into the box body 10.

Through the above description, the advantages of the present invention can be summarized as follows:

First, in addition to forcing the outer side surfaces of the connecting wall portions 121 of the first side walls 12 to abut against the inner side surfaces of the second side walls 13 through the inner membrane layer 20, more importantly, the present invention utilizes the first attachment through-holes 122 of the connecting wall portions 121 of the first side walls 12 to cooperate with the design of the first recessed portions 21 of the inner membrane layer 20. Within the range covered by each connecting wall portion 121, each first recessed portion 21 of the inner membrane layer 20 can be further extended through the first through-holes 122 of each connecting wall portion 121. The first attachment perforation 122 is adhered to the inner surface of the corresponding second side wall 13 to increase the mutual adhesion area and adhesion force between the inner film layer 20 and the second side walls 13, so that each connecting wall portion 121 can be more firmly against the corresponding second side wall 13. In this way, even if the present invention is subjected to pressure during use, it can effectively prevent each connecting wall portion 121 from being pushed away from the corresponding second side wall 13, thereby avoiding the problem of the inner film layer 20 being accidentally damaged.

Second, the present invention utilizes the design that the first attachment through-hole 122 of the connecting wall portion 121 of the first side walls 12 is adjacent to the inner fold 123. While the inner film layer 20 covers the outer edge of the connecting wall portion 121 of the first side walls 12, the inner film layer 20 can also generate a restrictive gripping force on the inner side of the connecting wall portion 121 of the first side walls 12 through the first recessed portions 21, so that each connecting wall portion 121 can be stably positioned on the corresponding second side wall 13.

8 and 9, which are a second embodiment of the present invention. The second embodiment is similar to the first embodiment. The difference between the second embodiment and the first embodiment is that:

Each connecting wall portion 121 of each first side wall 12 is formed with three first attachment through holes 122 spaced apart from each other. In the second embodiment, each first attachment through hole 122 is circular.

The inner membrane layer 20 includes twelve first sunken portions 21 respectively corresponding to the first attachment through holes 122 of the connecting wall portions 121 of the first side walls 12. The first sunken portions 21 are sunken into the first attachment through holes 122 of the connecting wall portions 121 of the first side walls 12 respectively.

In this way, the second embodiment can also achieve the same purpose and effect as the first embodiment.

Referring to FIGS. 10 , 11 and 12 , a third embodiment of the present invention is shown. The third embodiment is similar to the first embodiment. The difference between the third embodiment and the first embodiment is that:

The box body 10 includes a bottom wall 11, two first side walls 12, two second side walls 13, and four flange walls extending outward from the top ends of the first side walls 12 and the second side walls 13 respectively.

The first attachment through hole 122 of each connecting wall portion 121 of each first side wall 12 is rectangular.

Each of two flange walls extending from the first side walls 12 is defined as a first flange wall 15, and each of the other two flange walls extending from the second side walls 13 is defined as a second flange wall 16.

Each first flange wall 15 is adjacent to the second flange walls 16, and each first flange wall 15 has two overlapping portions 151 that intersect with the adjacent second flange walls 16. Each second flange wall 16 is adjacent to the first flange walls 15, and each second flange wall 16 has two overlapping portions 161 that intersect with the adjacent first flange walls 15.

One overlapping portion 161 of each second flange wall 16 is located on one overlapping portion 151 of an adjacent first flange wall 15 and forms a second attachment through hole 162 .

The inner membrane layer 20 includes four first recessed portions 21 and four second recessed portions 22 .

The first sunken portions 21 are sunken into the first attachment through holes 122 of the connecting wall portions 121 of the first side walls 12 respectively.

Each second sunken portion 22 sunken into the second attachment through hole 162 of one of the overlapping portions 161 of one of the corresponding second flange walls 16 , and attached to the inner side surface of one of the overlapping portions 151 of one of the first flange walls 15 adjacent to the one of the second flange walls 16 .

In this way, the third embodiment can also achieve the same purpose and effect as the first embodiment.

Referring to FIGS. 13 and 14 , a fourth embodiment of the present invention is shown. The fourth embodiment is similar to the third embodiment. The difference between the fourth embodiment and the third embodiment is that:

The connecting wall portions 121 of each first side wall 12 are located outside the accommodating space 14 and abut against the outer side surface of one of the adjacent second side walls 13 . Each second side wall 13 is formed with two first attachment through holes 131 corresponding to the connecting wall portions 121 of one of the first side walls 12 .

The inner film layer 20 includes four first sunken portions 21 . Each first sunken portion 21 is sunken into a first attachment through hole 131 of a corresponding second side wall 13 and attached to an inner surface of a connecting wall portion 121 of a first side wall 12 adjacent to the second side wall 13 .

In this way, the fourth embodiment can also achieve the same purpose and effect as the third embodiment.

In summary, the paper container with an inner film layer of the present invention can not only increase the mutual adhesion area and adhesion force between the inner film layer and the second side walls, so that the connecting wall portions of the first side walls can be more stably against the corresponding second side walls, but also can effectively prevent each connecting wall portion from being pushed away from the corresponding second side wall, so that the purpose of the present invention can be achieved.

However, the above is only an example of the implementation of the present invention, and it should not be used to limit the scope of the implementation of the present invention. All simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still within the scope of the patent of the present invention.

100: Paper container 10: Box body 11: Bottom wall 12: First side wall 121: Connecting wall 122: First attachment perforation 123: Inner fold 13: Second side wall 131: First attachment perforation 14: Accommodation space 15: First flange wall 151: Overlapping portion 16: Second flange wall 161: Overlapping portion 162: Second attachment perforation 20: Inner film layer 21: First sunken portion 22: Second sunken portion 1: Box body 101: Bottom wall 102: First side wall 103: Second side wall 104: Connecting wall 105: Accommodation space 106: Outer contour 2: Laminating film 3: Intima layer

Other features and effects of the present invention will be clearly presented in the implementation method with reference to the drawings, in which: Figure 1 is a three-dimensional view of a known paper lunch box; Figure 2 is a three-dimensional view of another known paper lunch box; Figure 3 is an incomplete cross-sectional view taken along line III-III in Figure 2; Figure 4 is an unfolded plan view of a box body of a first embodiment of a paper container with an inner film layer of the present invention; Figure 5 is an exploded three-dimensional view of the first embodiment; Figure 6 is a combined three-dimensional view of the first embodiment; Figure 7 is an incomplete cross-sectional view taken along line VII-VII in Figure 6; Figure 8 is a combined three-dimensional view of a second embodiment of a paper container with an inner film layer of the present invention; Figure 9 is an incomplete cross-sectional view taken along line IX-IX in Figure 8; FIG. 10 is a combined three-dimensional diagram of a third embodiment of the paper container with an inner film layer of the present invention; FIG. 11 is an incomplete cross-sectional diagram taken along line ⅩⅠ-ⅩⅠ in FIG. 10; FIG. 12 is an incomplete cross-sectional diagram taken along line ⅩⅡ-ⅩⅡ in FIG. 10; FIG. 13 is a combined three-dimensional diagram of a fourth embodiment of the paper container with an inner film layer of the present invention; and FIG. 14 is an incomplete cross-sectional diagram taken along line ⅩⅣ-ⅩⅣ in FIG. 13.

100: paper container 10: box body 11: bottom wall 12: first side wall 121: connecting wall 122: first attachment perforation 123: inner fold 13: second side wall 14: storage space 20: inner film layer

Claims (9)

A paper container with an inner film layer comprises: A box body, including a bottom wall, and a plurality of side walls extending upward from the periphery of the bottom wall, the bottom wall and the side walls cooperate to define a containing space, one of any two adjacent side walls has at least one connecting wall portion, the connecting wall portion is located in the containing space, the connecting wall portion is formed with at least one first attachment through-hole, and abuts against the inner side surface of the other of the any two adjacent side walls; and An inner film layer, attached to the inner surface of the box body, and including at least one first sinking portion, the first sinking portion sinks into the first attachment through-hole of the connecting wall portion of the one of the any two adjacent side walls, and is attached to the inner side surface of the other of the any two adjacent side walls. A paper container with an inner film layer as described in claim 1, wherein the connecting wall portion forms a first attachment through-hole, and the first attachment through-hole is oblong. A paper container with an inner film layer as described in claim 1, wherein the connecting wall portion is formed with a plurality of first attachment perforations spaced apart from each other, and the inner film layer includes a plurality of first recessed portions corresponding to the first attachment perforations, respectively. A paper container with an inner film layer as described in claim 3, wherein each first attachment perforation is circular. A paper container with an inner film layer as described in claim 1, wherein the connecting wall portion has an inner fold and the first attachment perforation is adjacent to the inner fold. A paper container with an inner film layer as described in claim 1, wherein the box body further includes a plurality of flange walls extending outward from the top ends of the side walls, each flange wall having two overlapping portions that are staggered with two adjacent flange walls, one overlapping portion of any two adjacent flange walls being located on one overlapping portion of the other of the any two adjacent flange walls, and having a second attachment perforation formed therein, and the inner film layer further includes at least one second sunken portion, the second sunken portion being sunken into the second attachment perforation of one of the overlapping portions of one of the any two adjacent flange walls, and being attached to the inner side surface of one of the overlapping portions of the other of the any two adjacent flange walls. A paper container with an inner film layer comprises: a box body, including a bottom wall, and a plurality of side walls extending upward from the periphery of the bottom wall, the bottom wall and the side walls cooperate to define a containing space, one of any two adjacent side walls has at least one connecting wall portion, the connecting wall portion is located outside the containing space and abuts against the outer side surface of the other of any two adjacent side walls, the other of any two adjacent side walls is formed with at least one first attachment through-hole corresponding to the connecting wall portion; and an inner film layer, attached to the inner surface of the box body, and including at least one first sinking portion, the first sinking portion sinks into the first attachment through-hole of the other of any two adjacent side walls, and is attached to the inner side surface of the connecting wall portion of the one of any two adjacent side walls. A paper container with an inner film layer as described in claim 7, wherein the first attachment perforation is rectangular. A paper container with an inner film layer as described in claim 7, wherein the box body further includes a plurality of flange walls extending outward from the top ends of the side walls, each flange wall having two overlapping portions that are staggered with two adjacent flange walls, one overlapping portion of any two adjacent flange walls being located on one overlapping portion of the other of the any two adjacent flange walls, and having a second attachment perforation formed therein, and the inner film layer further includes at least one second sunken portion, the second sunken portion being sunken into the second attachment perforation of one of the overlapping portions of one of the any two adjacent flange walls, and being attached to the inner side surface of one of the overlapping portions of the other of the any two adjacent flange walls.

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