Paper container
The paper container's innovative crease line and anti-slip design addresses the challenge of gripping and pouring large containers, ensuring easy and stable handling for all users.
Patent Information
- Application Number
- JP2023102110
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-06-21
- Publication Date
- 2025-01-09
AI Technical Summary
Existing paper containers with large capacities and thick bodies are difficult to grip and pour due to limited finger space, especially for individuals with short fingers or weak strength, leading to insufficient gripping force.
The paper container design features four body panels with inward-bulging crease lines and anti-slip ruled lines, allowing for wide finger placement and stable grip, facilitated by elliptical arc-shaped crease lines and vertical anti-slip lines to prevent slipping.
The design enables reliable gripping and pouring of liquid contents from containers with large capacities and thick bodies, even for individuals with limited finger strength or short fingers, by providing a stable and easy-to-grasp structure.
Smart Images
Figure 2025002153000001_ABST
Abstract
Description
[Technical field]
[0001] The present invention relates to a paper container for containing a liquid content. [Background technology]
[0002] Conventionally, a widely used paper container for storing liquid contents such as milk, juice, and alcoholic beverages is a gable-roof-type paper container which is made of a paperboard material with a thermoplastic resin laminated on the front and back sides, has four body panels connected together via vertical fold lines in the body, and has the edges joined by a vertical seal panel to form a rectangular body. The upper ends of the body panels are connected to a pair of gable-roof-forming panels facing each other and having an outer top seal panel at their upper parts, and a pair of gable-wall-forming panels facing each other and having an inner top seal panel at their upper parts, one of which serves as a pouring outlet and can be opened, and the pair of gable-roof-forming panels are folded between the pair of gable-roof-forming panels, and the outer top seal panel and the inner top seal panel are heated and sealed at predetermined positions to form a hermetic seal, thereby forming a top (see, for example, Patent Document 1).
[0003] When pouring liquid contents from such a gable roof type paper container, the body is generally held with fingers gripping the right and left side panels from the rear panel side, with the body panel located on the side of the pouring outlet formed at the top being the front panel out of the four body panels. [Prior art documents] [Patent documents]
[0004] [Patent Document 1] JP 2002-234524 A Summary of the Invention [Problem to be solved by the invention]
[0005] However, when gripping the body part, as described above, the right and left side panels are grasped from the rear panel side by pinching them with the fingers, so the amount of finger contact with the right and left side panels when gripping them with the fingers is affected by the width of the rear panel of the body. For example, when the rear panel of the body is particularly wide, i.e., in the case of a paper container with a large capacity and a thick body, the amount of finger contact with the right and left side panels is small and strong force is required at the fingertips. In particular, for people with relatively short fingers or weak strength, such as women and children, the gripping force when gripping is insufficient and it may be difficult to grip.
[0006] An object of the present invention is to provide a paper container that allows a liquid content to be securely gripped and poured even if the paper container has a large capacity and a thick body. [Means for solving the problem]
[0007] In order to achieve the above object, the invention described in claim 1 is a container made of a paperboard material having a thermoplastic resin laminated on the front and back surfaces, and has four body panels connected together via body vertical fold lines, the edges of which are joined by a vertical seal panel to form a rectangular body, and a pair of gable roof forming panels facing each other and having an outer top seal panel at the top, and a pair of gable wall forming panels facing each other and having an inner top seal panel at the top, one of which serves as a pouring outlet and can be opened, are connected together via a top horizontal fold line at the upper end of the body panels, and the pair of gable roof forming panels are folded between the pair of gable roof forming panels, and the outer top seal panel and the inner top seal panel are heated at a predetermined position to seal the container. In this gable roof-type paper container, the top is formed by sealing the container together with the gable wall forming panel, and when the one of the four body panels to which the gable wall forming panel that serves as the pouring outlet and is opened is connected is defined as the body front panel, the body back panel to which the other gable wall forming panel is connected has two first fold lines formed on or near the left and right body vertical fold lines of the body back panel, which are connected to two base points set in the up and down direction along the left and right body vertical fold lines and bulge inward in the width direction of the body back panel, and the left body side panel and the right body side panel have anti-slip lines formed in the horizontal direction and extending in the up and down direction.
[0008] According to the invention of claim 1, when the body panel to which one of the gable wall forming panels that serves as a pouring outlet and is opened is connected among the four body panels is the body front panel, two first fold lines that connect to two base points set in the up-down direction along the left and right body vertical fold lines on or near the left and right body vertical fold lines of the body back panel and bulge toward the inside in the width direction of the body back panel are formed in the body back panel, which is the body panel to which the other gable wall forming panel is connected, so that when pouring out liquid contents, the body is pressed by grasping with fingers from the left and right at the intersections between the left and right body vertical fold lines of the left and right body vertical fold lines of the body back panel and imaginary lines extending horizontally from the vertices of the first fold lines. As a result, the back panel of the torso is mountain-folded along the two first fold lines, and the back panel side of the torso is easily crushed and recessed at the imaginary intersections of the left and right vertical torso fold lines of the back panel of the torso and imaginary lines extending horizontally from the apexes of the first fold lines. As a result, the left and right side panels of the torso are also recessed. In the torso, the back panel of the torso has a minimum width between the apexes of the two first fold lines and a concave portion that gradually widens toward the left and right vertical torso fold lines of the front panel of the torso. By grasping this concave portion, a wide area can be placed over the left and right side panels of the torso, making it easy to grip the torso.
[0009] In addition, the concave portions of the left and right side panels of the body are inclined in the narrow width direction toward the back panel of the body, but anti-slip lines extending vertically are formed in the horizontal direction on the left and right side panels of the body, so that fingers gripping the concave portions of the left and right side panels of the body will catch on the anti-slip lines, preventing the paper container from slipping off from the fingers.
[0010] The invention described in claim 2 is characterized in that the first fold line according to claim 1 is formed in a substantially elliptical arc shape having a vertex at the maximum bulging position.
[0011] According to the invention described in claim 2, the body is formed into a substantially elliptical arc shape with the maximum bulge position as the apex, so that when the body is pinched and pressed at the imaginary intersection points between the left and right body vertical fold lines of the first fold lines of the back panel and imaginary lines extending horizontally from the apexes of the first fold lines, the back front panel can be easily mountain-folded from the two first fold lines.
[0012] The invention described in claim 3 is characterized in that, according to claim 1 or 2, each apex of the first fold lines is located at approximately the middle position in the vertical direction of the torso back panel.
[0013] According to the invention described in claim 3, each apex of the first fold line is located at approximately the middle in the vertical direction of the back panel of the body, and therefore the concave portion is formed at approximately the middle in the vertical direction of the body, allowing the paper container to be gripped in a stably state when pouring. Effect of the Invention
[0014] As described above, with the paper container of the present invention, a paper container can be obtained that allows the paper container to be securely gripped and poured when pouring liquid contents, even if the paper container has a large capacity and a thick body. [Brief description of the drawings]
[0015] [Figure 1] FIG. 1 is a perspective view from the rear side showing an example of an embodiment of a paper container according to the present invention. [Diagram 2] FIG. 2 is a front view of the paper container shown in FIG. [Diagram 3] FIG. 2 is a left side view of the paper container shown in FIG. [Figure 4] FIG. 2 is a right side view of the paper container shown in FIG. [Diagram 5] FIG. 2 is a rear view of the paper container shown in FIG. [Figure 6] FIG. 2 is a plan view showing a carton blank for the paper container shown in FIG. [Figure 7] FIG. 2 is a right side view of the paper container shown in FIG. 1 with the spout open. [Figure 8]8 is an explanatory diagram showing the operation of squeezing the rear panel side of the body of the paper container shown in FIG. 7 from both sides. FIG. [Figure 9] 9 is a rear view of the paper container in which the rear panel side of the body part is crushed from both sides by the action shown in FIG. 8. FIG. [Figure 10] FIG. 10 is a right side view of the paper container shown in FIG. [Figure 11] 11 is an explanatory diagram showing a state in which the body of the paper container shown in FIG. 10 is gripped and held. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0016] Hereinafter, an embodiment of a paper container according to the present invention will be described in detail with reference to the drawings. 1 to 11 show an example of an embodiment of a paper container according to the present invention, in which Fig. 1 is a perspective view from the back side showing the paper container of this example, Fig. 2 is a front view of the paper container shown in Fig. 1, Fig. 3 is a left side view of the paper container shown in Fig. 1, Fig. 4 is a right side view of the paper container shown in Fig. 1, Fig. 5 is a back view of the paper container shown in Fig. 1, Fig. 6 is a plan view showing a carton blank of the paper container shown in Fig. 1, Fig. 7 is a right side view of the paper container shown in Fig. 1 with the spout open, Fig. 8 is an explanatory diagram showing the operation of crushing the back panel side of the body of the paper container shown in Fig. 7 from both sides, Fig. 9 is a back view of the paper container after the back panel side of the body of the paper container has been crushed from both sides by the operation shown in Fig. 8, Fig. 10 is a right side view of the paper container shown in Fig. 9, and Fig. 11 is an explanatory diagram showing the body of the paper container shown in Fig. 10 being gripped and held.
[0017] The paper container 1 of this example is formed from a carton blank 2, which is a paperboard material with a thermoplastic resin laminated on the front and back sides as shown in Fig. 6. The carton blank has four body panels 6, 7, 8, and 9 connected via body vertical fold lines 3, 4, and 5. When the paper container 1 is formed, the four body panels 6, 7, 8, and 9 are joined at the edge 12 of the body panel 6 to a vertical seal panel 11 connected to the body panel 9 via the body vertical fold line 10, thereby forming a square tubular body 13 of the paper container 1.
[0018] A pair of opposing gable roof forming panels 16, 17 having outer top seal panels 14, 15 at their upper parts are connected to the upper ends of the body panels 6, 8 via top horizontal fold lines 18, 19, and a pair of opposing gable wall forming panels 22, 23 having inner top seal panels 20, 21 at their upper parts are connected to the upper ends of the body panels 7, 9 via top horizontal fold lines 24, 25, and the gable wall forming panels 22, 23 are folded between the gable roof forming panels 16, 17, and the outer top seal panels 14, 15 and the inner top seal panels 20, 21 are heated and sealed in predetermined positions to form a top 26. Then, one of the gable wall forming panels 22, 23 folded between the gable roof forming panels 16, 17 is pulled out and opened to form the spout 27. In this example, the gable wall forming panel 22 is the gable wall forming panel on the opening side.
[0019] The gable roof forming panels 16, 17 are formed with guide fold lines 28, 29 on the opening side of the gable wall forming panel 22 to guide the folding of the gable roof forming panels 16, 17 when opened.
[0020] The gable wall forming panels 22, 23 are formed with fold lines 30, 31, 32, 33 for folding the gable wall forming panels 22, 23, and approximately triangular surface portions 34, 35 are formed surrounded by the fold lines 30, 31, 32, 33 and the top horizontal fold lines 24, 25.
[0021] In addition, bottom panels 38, 39 are connected to the lower ends of the body panels 7, 9 via bottom horizontal fold lines 36, 37, and inner panels 42, 43 are connected to the lower ends of the body panels 6, 8 via bottom horizontal fold lines 40, 41, and the inner panels 42, 43 are folded and sealed inside the bottom panels 38, 39 to form a bottom 44.
[0022] Furthermore, when the body panel 7 of the four body panels 6, 7, 8, 9 to which one of the gable wall forming panels 22 which becomes the pouring outlet 27 and is opened is adjacently installed, i.e., the body panel 7 located on the pouring outlet 27 side, is defined as the body front panel 45, two first fold lines 47, 48 are formed on the body back panel 46 (body panel 9) which are connected to two base points P1, P2 set in the vertical direction along the left and right body vertical fold lines 5, 10 on or in their vicinity of the left and right body vertical fold lines 5, 10 of the body back panel 46 and bulge toward the inside in the width direction of the body back panel 46.
[0023] The length between base point P1, which is the upper end of the first fold lines 47, 48 set in the up-down direction along the body vertical fold lines 5, 10, and base point P2, which is the lower end, is not particularly limited, but is preferably at least 1 / 5 to 1 / 3 of the length of the body vertical fold lines 5, 10. If the length of the distance between base point P1 and base point P2, which is the lower end, is 1 / 5 or more of the length of the body vertical fold lines 5, 10, the mountain fold of the body back panel 46 from the first fold lines 47, 48, which will be described later, can be easily performed. Furthermore, if the length exceeds 1 / 3, the deformation of the body 13 becomes too large, and the paper container 1 may become difficult to grip.
[0024] In this example, the first fold lines 47, 48 are formed in a generally elliptical arc shape with the maximum bulging position as the apex T. The apex T of each of the first fold lines 47, 48 is located at approximately the middle position of the torso back panel 47 in the vertical direction.
[0025] In this example, the first fold lines 47, 48 are formed in a substantially elliptical arc shape, but are not limited to this as long as the shape has a vertex T at the maximum bulge position. For example, the fold lines may be in the shape of a V-shaped arc or a polygonal arc, and may not be limited to a continuous line but may be a segmented discontinuous line.
[0026] The horizontal dimension L1 from the body vertical fold lines 5,10 to the apex T of the first fold lines 47,48 is not particularly limited and is appropriately set depending on the thickness of the body 13, i.e., the horizontal dimension L2 of the body back panel 46, so that, as will be described later, when pouring, imaginary intersection sites Y1, Y2 between imaginary lines X1, X2 extending laterally from the apexes T of the first fold lines 47,48 at the left and right body vertical fold lines 5,10 on the left and right body back panel 46 are grasped with fingers from the left and right and pressed in a pinching manner, thereby depressing the body left side panel 49 (body panel 6) and the body right side panel 50 (body panel 8), thereby making it easier to grip the body 13.
[0027] Furthermore, anti-slip creases 51, 52 extending vertically are formed in the horizontal direction on the left and right torso side panels 49, 50 of the torso 13. The anti-slip creases 51, 52 are arranged so as to be located in the recessed portions of the left and right torso side panels 49, 50 when the left and right torso vertical fold creases 5, 10 on the left and right torso back panel 46 are pinched with fingers from the left and right at imaginary intersections Y1, Y2 with imaginary lines X1, X2 extending horizontally from vertices T of the first fold creases 47, 48. There are no particular limitations on the number, shape, or length of the anti-slip creases.
[0028] In addition, in this example, a downward arc-shaped second fold line 53 is formed on the torso front panel 45 of the torso 13, with its end portion located at or near the upper ends of the left and right torso vertical fold lines 3, 4 of the torso front panel 45 of the torso 13.
[0029] A pair of spout-forming auxiliary fold lines 54, 55 are formed on the gable wall forming panel 22 and the body front panel 45, which extend vertically at a distance from the imaginary line X3 on either side of the imaginary line X3 that hangs down from the apex of the approximately triangular surface portion 34 formed on the gable wall forming panel 22. The distance between the spout-forming auxiliary fold lines 54, 55 increases as they move downward. The upper ends of the spout-forming auxiliary fold lines 54, 55 reach the folding lines 30, 31 formed on the gable wall forming panel 22, and the lower ends of the spout-forming auxiliary fold lines 54, 55 straddle the body second fold line 53 and reach the body vertical fold lines 3, 4 on the left and right of the front panel 45.
[0030] In addition, an upwardly curved third fold line 56 is formed on the body front panel 45, with its left and right ends located lower than the lower ends of the spout formation auxiliary fold lines 54, 55 and at or near the vertical center or higher than the center of the body vertical fold lines 3, 4.
[0031] In addition, a fourth fold line 57 is formed on the approximately triangular surface portion 34 of the gable wall forming panel 22 and the torso front panel 45, hanging down from the vertex of the approximately triangular surface portion 34, across the apex horizontal fold line 24 and the second fold line 53, along the imaginary line X3, and to the third fold line 56.
[0032] When pouring liquid contents from the paper container 1 configured as described above, first insert your fingers into the space formed between the gable roof forming panels 16, 17, the body front panel 45 and the gable wall forming panel 22, and peel away the heat-sealed opposing surfaces of the outer top seal panels 14, 15 and the inner top seal panels 20, 21 on the gable wall forming panel 22 side which forms the pouring outlet 27, and pull out the gable wall forming panel 22 which is folded between the pair of gable roof forming panels 16, 17 to open the pouring outlet 27 (see Figure 7).
[0033] When the spout 27 is opened, in this example, the top corner 58 of the body 13 formed by folding the top horizontal fold line 24 is pressed toward the inside of the paper container 1, The body front panel 45 is folded at the second fold line 53, and the top corner 58 is recessed toward the inside of the paper container 1. This widens the space formed between the gable roof forming panels 16, 17, the body front panel 45, and the gable wall forming panel 22, making it easier to insert fingers.
[0034] When the gable wall forming panel 22 folded between the gable roof forming panels 16, 17 is pulled out, the gable wall forming panel 22 and the body front panel 45 make a mountain fold from the fourth fold line 57 and the body front panel 45 make a valley fold from the third fold line 56, the spout 27 protrudes outward from the paper container 1, and the gable wall forming panel 22 and the body front panel 45 make a mountain fold from the spout formation auxiliary fold lines 54, 55, causing the tip side of the open spout 27 to spread laterally, making it easy to drink from the spout 27 when used as a drinking spout.
[0035] After opening the spout 27 in this manner, as shown in FIG. 8, the body 13 is pressed by grasping with fingers from the left and right at imaginary intersection points Y1, Y2 with imaginary lines X1, X2 extending horizontally from vertices T of the first fold lines 47, 48 in the left and right body vertical fold lines 5, 10 of the body back panel 46.
[0036] As a result, the torso back panel 46 is mountain-folded along the two first fold lines 47, 48, and the torso back panel 46 side of the torso 13 is easily crushed and dented at imaginary intersections Y1, Y2 of the left and right torso vertical fold lines 5, 10 of the torso back panel 46 and imaginary lines X1, X2 extending laterally from the vertices T of the first fold lines 47, 48, respectively. As a result, the torso left side panel 49 and the torso right side panel 50 are also dented. In the case of the torso 13, the width of the torso back panel 46 is at its minimum between the vertices T of the first fold lines 47, 48, and the torso front panel 45 has concave portions 59 that gradually widen toward the left and right torso vertical fold lines 3, 4 (see Figs. 9 and 10). Therefore, by grasping the concave portions 59, a wide area can be placed over the left torso side panel 49 and the right torso side panel 50, making it easy to grip the torso 13 (see Fig. 11).
[0037] In addition, in the case of the body 13 in which the body vertical fold lines 5, 10 and the first fold lines 47, 48 are crushed and concave at the imaginary intersection points Y1, Y2, the body back panel 46 has a minimum width between the vertices T of the first fold lines 47, 48, and a concave portion 59 is formed whose width gradually widens toward the left and right body vertical fold lines 3, 4 of the body front panel 45. The concave portion 59 slopes in the narrowing direction toward the body back panel 46, but since the anti-slip lines 51, 52 extending in the vertical direction are formed in the horizontal direction on the left body side panel 49 and the right body side panel 50, fingers gripping the concave portions 59 of the left body side panel 49 and the right body side panel 50 will catch on the anti-slip lines 51, 52, preventing the paper container 1 from slipping off the fingers.
[0038] In this embodiment, the anti-slip lines 51 and 52 are each formed in three (multiple) lines. By forming multiple anti-slip lines 51 and 52, the anti-slip effect can be further improved.
[0039] In addition, in this example, the first fold lines 47, 48 are formed in a generally elliptical arc shape with vertex T at the maximum bulge position, so that when the torso 13 is pinched and pressed at imaginary intersection points Y1, Y2 between the imaginary lines X1, X2 extending laterally from the respective vertices T of the first fold lines 47, 48 at the left and right torso vertical fold lines 5, 10 of the torso back panel 46, the back front panel 46 is easily mountain-folded from the first fold lines 47, 48.
[0040] Furthermore, since the vertices T of the first fold lines 47, 48 are located at approximately the vertical center of the body back panel 46, the concave portion 59 is formed at approximately the vertical center of the body 13, so that the paper container 1 can be gripped in a stably state when pouring. [Explanation of symbols]
[0041] 1 Paper container 2 Carton Blanks 3,4,5 Vertical fold lines on body 6,7,8,9 Body Panels 10 Body vertical fold line 11 Vertical Seal Panel 12 Edge 13 Torso 14,15 Outer top seal panel 16,17 Gable roof forming panel 18,19 Top horizontal fold lines 20,21 Inner top seal panel 22,23 Gable wall forming panel 24,25 Top horizontal fold lines 26 Top 27 Spout 28,29 Guide fold lines 30, 31, 32, 33 Folding lines 34,35 Almost triangular surface part 36,37 Bottom horizontal fold lines 38,39 Bottom panel 40,41 Bottom horizontal fold lines 42,43 Inner panel 44 Bottom 45 Front body panel 46 Back panel of the torso 47,48 First fold line 49 Left side panel of fuselage 50 Right side panel of fuselage 51,52 Anti-slip lines 53 Second fold line 54,55 Auxiliary fold lines for forming spout 56 Third fold line 57 4th fold line 58 Top corner 59 Concave part T vertex L1, L2 width dimensions X1, X2, X3 Virtual line Y1, Y2 virtual intersection point P1, P2 base point
Claims
1. A gable roof-shaped paper container is made of a paperboard material having thermoplastic resin laminated on both sides thereof, and has four body panels connected together via body vertical fold lines, the edges of which are joined by vertical seal panels to form a rectangular body, and a pair of gable roof forming panels facing each other and having an outer top seal panel at their upper parts, and a pair of gable wall forming panels facing each other and having an inner top seal panel at their upper parts, one of which serves as a pouring outlet and can be opened, are connected together at the upper ends of the body panels via top horizontal fold lines, and the pair of gable wall forming panels are folded between the pair of gable roof forming panels, and the outer top seal panel and the inner top seal panel are heated and sealed at predetermined positions to form a hermetic top, When the body panel to which the gable wall forming panel, which serves as the pouring outlet and is opened, is connected to the body front panel among the four body panels, the body back panel, which is the body panel to which the other gable wall forming panel is connected, is formed with two first fold lines that are connected to two base points set in the up and down direction along the left and right body vertical fold lines on or near the left and right body vertical fold lines of the body back panel and bulge toward the inside in the width direction of the body back panel, The paper container is characterized in that anti-slip lines extending vertically and extending horizontally are formed on the left side panel and the right side panel of the body.
2. 2. The paper container according to claim 1, wherein the first fold line is formed in a substantially elliptical arc shape having a vertex at a position where the paper container is bulged to the maximum extent.
3. 3. The paper container according to claim 1, wherein each apex of the first fold lines is located at a substantially central position in the longitudinal direction of the body rear panel.
Citation Information
Patent Citations
Gable-top type paper container
JP2002234524A