JP5987383B2 - Paper container - Google Patents

Description

  The present invention relates to a paper container that has been subjected to an easy opening process so as to be easily opened.

  As an easy opening process for a paper container, a perforation process that penetrates the entire thickness of the paper is most commonly used. In the case of a paper box that does not require sealing, such as an outer box of canned beer or a confectionery packaged individually, there is no problem with the perforation that penetrates the paper layer. It cannot be applied to paper containers that need it.

  For example, in the case of a powder detergent paper container, water may splash on the outside of the box, and a certain degree of moisture resistance is required for the contents of the box. For this reason, in the case of a paper container for powder detergent, for example, polyethylene resin is laminated on the front and back surfaces of the paper to ensure water resistance and moisture resistance, and the opening method is a little shifted from the planned opening line. For example, a method of half-cutting from the back surface and opening the paper by using an in-layer break of the paper is employed.

  If the paper thickness is large, such as a powder detergent paper container, the permissible range of half-cut processing is wide, so stable opening is obtained, but if the paper thickness is thin, the depth of half-cut processing is obtained. Therefore, depending on the variation in the depth of the half-cutting process, there arises a problem that the unsealing band deviates from the original intended opening line and the paper is torn or torn.

  The paper container described in Patent Document 1 has been made to solve this problem. Two parallel half-cut lines are formed on the surface side of the paper, and the two half-cut lines are formed. Two parallel half-cut lines having a narrow width are formed on the back side of the paper, and one auxiliary half-cut line is provided between the two half-cut lines on the back side.

JP 2009-62078

  According to the paper container described in Patent Document 1, even if the half-cut line on the back side, which is particularly likely to deviate, deviates temporarily and the paper starts to tear, it is in the center of the two half-cut lines on the back side. Since the progress of tearing is stopped by the provided auxiliary half-cut line, the unsealing band will not be broken.

  However, in the case of the paper container described in Patent Document 1, in the worst case, the paper left uncut to the center of the two half-cut lines is exposed, which is not only a problem in appearance. There was a problem that the contents could get stuck and could not be taken out.

  The problem to be solved by the present invention is to solve the above-mentioned problems of easy opening by half-cutting of the front and back, and to make a paper container that has been subjected to easy opening that can be reliably opened and is not unsightly in appearance. It is what we propose.

As means for solving the above problems, the invention according to claim 1 is a paper container having a coating layer on the front and back surfaces of a paper layer and capable of being opened along the opening line, the opening line being , One surface half-cut line reaching the paper layer through the surface coating layer, and one back half-cut line passing through the back coating layer and reaching the paper layer in parallel therewith, It has a plurality of back half-cut auxiliary lines that penetrate from the back half-cut line diagonally rearward on the opposite side to the front half-cut line with respect to the opening direction and penetrate the back coat layer to reach the paper layer. It is a paper container.

The paper container according to the present invention, as an opening line, in addition to the normally used front half-cut line and back half-cut line, from the back half-cut line, obliquely rearward on the side opposite to the front half-cut line with respect to the opening direction. opposite, is provided with the plurality of back surface and a half cutting auxiliary line to reach the paper layer through the backside coating layer, even began torn paper deviates from the backside half cutting line upon opening, breach of the paper back face half Since it hits the cutting auxiliary line and returns to the original back half-cut line, the tearing of the paper does not grow greatly. This ensures a stable opening operation.

  The invention described in claim 2 is characterized in that an opening band is formed by providing two unsealing lines each having the back half-cut auxiliary line so that the back half cut auxiliary lines face each other. It is a paper container as described in above.

  Further, the invention according to claim 3 is characterized in that an unsealing band comprising one unsealing line having the back half-cut auxiliary line and one unsealing line not having the back half-cut auxiliary line is formed. The paper container according to claim 1.

  In addition, the invention according to claim 4 is characterized in that the back half-cut auxiliary line is a straight line extending obliquely rearward from the back half-cut line on the side opposite to the front half-cut line with respect to the opening direction. It is a paper container of any one of Claims 1-3.

  Further, in the invention according to claim 5, the back half-cut auxiliary line is directed obliquely rearward from the back half-cut line to the opposite side of the front half-cut line with respect to the opening direction, and the tip is the back half-cut line. The paper container according to any one of claims 1 to 3, wherein the paper container is a curve curved in an approaching direction.

  Further, in the invention according to claim 6, the back half cut auxiliary line is bent obliquely from the back half cut line toward the rear side opposite to the front half cut line with respect to the opening direction, and is bent to the back half cut line. The paper container according to any one of claims 1 to 3, wherein the paper container is a straight line parallel to the direction opposite to the opening direction.

The paper container according to the present invention is a paper container that has a film layer on the front and back surfaces of the paper layer and can be opened along an opening line, and the opening line reaches the paper layer through the surface film layer. There is one surface half-cut line and one back half-cut line that passes through the back surface coating layer and reaches the paper layer in parallel with the front surface half-cut line. A paper container characterized by having a plurality of back half-cut auxiliary lines that penetrate diagonally rearward on the side opposite to the half-cut line and penetrate the back film layer to reach the paper layer. The paper container according to the present invention, as an opening line, in addition to the normally used front half-cut line and back half-cut line, from the back half-cut line, obliquely rearward on the side opposite to the front half-cut line with respect to the opening direction. opposite, is provided with the plurality of back surface and a half cutting auxiliary line to reach the paper layer through the backside coating layer, even began torn paper deviates from the backside half cutting line upon opening, breach of the paper back face half Since it hits the cutting auxiliary line and returns to the original back half-cut line, the tearing of the paper does not grow greatly. For this reason, the stable opening property is obtained.

  This feature is particularly effective when the thickness of the paper is not sufficiently thick and half-cut lines on the front and back sides cannot be inserted with sufficient depth accuracy.

Further, since the back half-cut auxiliary line is provided on the back side of the paper, it cannot be seen from the front side, and therefore the appearance of the paper container is not impaired.

  Further, in the invention according to claim 2, when an opening band is formed by providing two unsealing lines having a back half-cut auxiliary line so that the back half-cut auxiliary lines face each other, a stable opening property is obtained. It is possible to provide a paper container with an unsealed band that has an excellent appearance.

  Further, depending on the shape and opening position of the paper container, as in the invention according to claim 3, one unsealing line having a back half-cut auxiliary line and one conventional unopening line having a back half-cut auxiliary line. In some cases, an unwrapped band consisting of In this case, it is possible to save a cutting blade for providing a back side half-cut auxiliary line.

  Further, in the invention according to claim 4, when the back half-cut auxiliary line is a straight line extending diagonally rearward from the back half-cut line to the front half-cut line with respect to the opening direction, The structure of the cutting blade for engraving the line is simplified, which is advantageous in terms of cost.

  Further, in the invention according to claim 5, the back half-cut auxiliary line is directed obliquely rearward from the back half-cut line on the opposite side to the front half-cut line with respect to the opening direction, and the tip approaches the back half-cut line. When the curved line is curved in the direction in which the paper is cut, the probability that the paper cut deviating from the back half-cut line is supplemented is higher than in the case of a straight line, and a more reliable opening property can be obtained. The same applies to the invention described in claim 6.

FIG. 1 is a perspective view showing an embodiment of a paper container according to the present invention. FIG. 2 is a perspective view showing another embodiment of the paper container according to the present invention. FIG. 3 is an explanatory diagram in which the opening band portion of the paper container shown in FIG. 1 is enlarged. FIG. 4 is an enlarged view of the opening band portion of the paper container according to claim 3 of the present invention. FIG. 5 is a cross-sectional explanatory view showing the structure of the unsealing band in the paper container according to the present invention. FIG. 6 is a schematic diagram showing the shape of the back half-cut auxiliary line in the paper container according to the present invention. FIG. 6 (1) shows the back half cut auxiliary line according to claim 5 of the present invention. 6 (2) indicates a back half-cut auxiliary line according to claim 6, respectively. FIG. 7 is a perspective view showing another embodiment of the paper container according to the present invention. FIG. 8 is a perspective view showing another embodiment of the paper container according to the present invention.

Hereinafter, a paper container according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an embodiment of a paper container according to the present invention. FIG. 2 is a perspective view showing another embodiment of the paper container according to the present invention. FIG. 3 is an explanatory diagram in which the opening band portion of the paper container shown in FIG. 1 is enlarged. FIG. 4 is an enlarged view of the opening band portion of the paper container according to claim 3 of the present invention. FIG. 5 is a cross-sectional explanatory view showing the structure of the unsealing band in the paper container according to the present invention. This will be described below with reference to these drawings.

The paper container (1) according to the present invention has a surface film layer (on the surface of the paper layer (11) as shown in FIG.
12), a back surface coating layer (13) on the back surface of the paper layer, and a paper container that can be opened along the opening line (2). The unsealing line (2) passes through the surface coating layer (12) and reaches the paper layer (11) with one surface half-cut line (4), and in parallel with this, the back coating layer (13) penetrates. And has one back half-cut line (5) reaching the paper layer (11), and further from the back half-cut line (5) opposite to the front half-cut line (4) with respect to the opening direction (7). The back surface half-cut auxiliary line (6) which goes diagonally rearward and reaches the paper layer (11) through the back surface coating layer (13). In FIG. 5, the back side half-cut auxiliary line (6) is omitted for the sake of clarity.

  When the opening line (2) is opened, as shown in FIG. 5, the paper layer (11) between the front half-cut line (4) and the back half-cut line (5) is broken within the layer (14 ) Is opened. Therefore, the paper layer (11) is protected by the coating layers on the front and back surfaces, and the front half-cut line (4) and the back half-cut line (5) are provided so as to be shifted with a certain interval. Therefore, there is no portion where the front and back surfaces of the paper communicate with each other by a cut line. For this reason, the paper container (1) can exhibit a certain degree of moisture resistance and waterproofness by selecting the material of the coating layer on the front and back surfaces.

  The material and thickness of the front surface film layer (12) and the back surface film layer (13) are not particularly limited, and may be a thermoplastic synthetic resin layer such as polyethylene resin, or a coating film by printing. A combination of these may also be used. In addition, when using paper having a surface film layer such as coated cardboard, a special layer may not be added.

  As in the embodiment shown in FIG. 1, the paper container (1) according to the present invention is provided with two unsealing lines (2) so that the back half-cut auxiliary lines (6) face each other. ) May be formed, or as in the embodiment shown in FIG. 2, there may be only one open line (2).

  Further, even when the unsealing band (3) is formed by two unsealing lines (2), as shown in FIG. 3, two unsealing lines (2) having the back half-cut auxiliary line (6) are opposed to each other. The unsealing band (3) may be formed together, or, as shown in FIG. 4, one unsealing line (2) having the back surface half-cut auxiliary line (6) and the back surface half-cut auxiliary line (6 ), That is, the unsealing band (3) may be formed by combining one conventional unsealing line (2) consisting only of the front half-cut line (4) and the back half-cut line (5).

  The opening band (3) shown in FIG. 4 is used because, for example, the opening band (3) is provided horizontally on the side wall of the paper container (1), and the opening band (3) is pulled upward. The lower opening line (2) tends to deviate from a paper tear at the back half-cut line, whereas the upper opening line (2) tends to cause a paper tear. This is the case when the backside half-cut auxiliary line (6) is unnecessary.

  The back half cut auxiliary line (6) of the unsealing line (2) used for the paper container (1) according to the present invention is from the back half cutting line (5) to the front half cutting line (4) with respect to the unsealing direction (7). ) On the opposite side to the opposite side, or from the back half-cut line (5) as shown in FIG. 6 (1) to the front half-cut line (7) with respect to the opening direction (7). It may be a curved line that is inclined obliquely rearward on the opposite side to 4) and whose tip is curved in a direction approaching the back half-cut line (5). Also, as shown in FIG. 6 (2), from the back half-cut line (5) toward the rear side on the opposite side of the front half-cut line (4) with respect to the opening direction (7), bent and folded back. It may be a straight line parallel to the line (5) and directed in the direction opposite to the opening direction (7).

  When the shape shown in (1) and (2) of FIG. 6 is used, when the tear of paper is going to deviate from the back half-cut line (5), the back half-cut auxiliary line (6) In addition, there is a tendency that the probability of returning to the original state is increased as compared with a simple straight line.

FIG. 7 is a perspective view showing another embodiment of the paper container (1) according to the present invention.
In the embodiment shown in FIG. 7, an opening band (3) is provided in the vertical direction at the center of the front plate of the paper container (1).

FIG. 8 is a perspective view showing another embodiment of the paper container (1) according to the present invention.
In the embodiment shown in FIG. 8, the opening start part (8) is provided in front of the paper container (1), and two opening lines (2) starting from the left and right of the opening start part (8) are provided. Is slanted to the top surface of the paper container (1), and a wide opening band is formed on the top surface. In the case of the conventional opening line consisting only of the front half-cut line (4) and the back half-cut line (5), such a wide opening band causes deviation of the paper tear at the back half-cut line (5). Although it was easy, in the paper container (1) which concerns on this invention, since a back surface half cut auxiliary line (6) exists, it can open smoothly.

Paper used for the paper container (1) according to the present invention includes, for example, Manila cardboard, white cardboard, chip cardboard, yellow cardboard, coated cardboard, double-sided cardboard, back white cardboard, and ivory paper. Paper of about 160 to 850 g / m ² is used.

  The front and back surfaces of the paper are usually subjected to processing such as printing, coating, film laminating and the like, and half-cut lines are processed simultaneously with punching into a blank shape.

  As a method of forming half-cut lines on the front and back surfaces of paper, there are a method using a blade, a method using a laser, etc., but a method using a flat press using a punching die equipped with a Thomson blade or a method using a rotary die cutter is available. It is common.

  The paper punched into a blank shape becomes a paper container (1) through a sack sticking and other forming processes according to the final shape.

DESCRIPTION OF SYMBOLS 1 ... Paper container 2 ... Opening line 3 ... Opening belt 4 ... Front surface half-cut line 5 ... Back surface half-cut line 6 ... Back surface half-cut auxiliary line 7 ... Opening direction 8 ... Opening start part 11 ... paper layer 12 ... surface film layer 13 ... back film layer 14 ... in-layer fracture of paper layer

Claims (6)

  A paper container having a coating layer on the front and back surfaces of a paper layer and capable of being opened along an opening line, wherein the opening line includes one surface half-cut line that reaches the paper layer through the surface coating layer In parallel with this, there is one back half-cut line that penetrates the back film layer and reaches the paper layer, and from the back half-cut line, diagonally opposite to the front half-cut line with respect to the opening direction A paper container characterized by having a plurality of back surface half-cut auxiliary lines that extend rearward and penetrate the back surface coating layer to reach the paper layer.   The paper container according to claim 1, wherein an opening band is formed by providing two unsealing lines each having the back half-cut auxiliary line so that the back half-cut auxiliary lines face each other.   The paper container according to claim 1, wherein an unsealing band comprising one opening line having the back half-cutting auxiliary line and one opening line not having the back half-cutting auxiliary line is formed.   The back side half-cut auxiliary line is a straight line that runs diagonally backward from the back side half-cut line to the side opposite to the front half-cut line with respect to the opening direction. The paper container described.   The back side half-cut auxiliary line is a curve that curves from the back side half-cut line to the diagonally rear side opposite to the front side half-cut line with respect to the opening direction, and the tip is curved in a direction approaching the back side half-cut line. The paper container of any one of Claims 1-3 characterized by the above-mentioned.   The back side half-cut auxiliary line is a straight line from the back side half-cut line toward the diagonally rear side opposite to the front side half-cut line with respect to the opening direction, bent and parallel to the back side half-cut line in the direction opposite to the opening direction. The paper container according to claim 1, wherein the paper container is provided.

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