NON-JAMMING STACKABLE PAPER CONTAINER

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a continuation of International Patent Application No. PCT/CN2024/093686 with an international filing date of May 16, 2024, which claims priority to Chinese Patent Application No. 202322482397.X, filed on September 13, 2023. The entire disclosure of the aforementioned applications is incorporated herein by reference in their entirety.

TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of paper cups, and in particular, to a non-jamming stackable paper container.

BACKGROUND TECHNOLOGY

[0003] Paper cups, paper bowls, paper boxes, and the like are commonly used paper containers in the catering industry. These paper containers are manufactured by mechanically processing and bonding base paper (white paperboard) made from chemical wood pulp. Owing to their safety, hygiene, light weight, and convenience, paper containers are widely used in public places, hotels, and restaurants. At present, the side walls of existing paper containers are generally tapered, with an opening diameter larger than a bottom diameter, and during transportation and sale, the paper containers are usually stacked in a tubular form.

[0004] Patent No. 202221351019.7 discloses a paper cup having a stacking bearing support structure, in which a plurality of paper cups are stacked and supported by a bearing platform surface of an inner cup body, thereby preventing mutual compression and deformation after stacking and facilitating easier dispensing of the paper cups. However, since the paper cups rely on the bearing platform surface for support during stacking, and the bearing platform surface is a stepped structure formed of paper, its strength is relatively low and it is prone to collapse and deform under even relatively low pressure. As a result, deformation of the stepped structure may cause the paper container to slide downward, leading to the risk of the stacked paper containers becoming stuck.

SUMMARY

[0005] The present disclosure is to provide a non-jamming stackable paper container, which facilitates the stacking of cup containers and increases the stacking strength, thereby effectively avoiding deformation after stacking that would otherwise cause the containers to become stuck.

[0006] To address the above-mentioned technical problems, the present disclosure adopts the following technical proposal: a non-jamming stackable paper container, including a body and a base located below the body. The body has a tapered tubular shape with an inclined and inwardly converging sidewall. The bottom of the body forms a bearing support structure. The bearing support structure is step-shaped, converging inwardly from a bottom edge of the body towards the center thereof. A limiting ring is connected to an outer side of the bearing support structure. The bearing support structure and the limiting ring form a support portion. When a plurality of paper containers are stacked, the base of an upper paper container is placed on the bearing support structure of a lower paper container, and the upper paper container is supported by the support portion.

[0007] In a preferred embodiment of the present disclosure, the base is a flared base expanding radially outward from a bottom of the bearing support structure. When paper containers are stacked, a lower end of the base of the upper paper container is located on an end face of the bearing support structure of the lower paper container, thereby supporting the upper paper container through the support portion.

[0008] In a preferred embodiment of the present disclosure, an inner side and an outer side of the bearing support structure are arc-shaped structures, and the limiting ring is closely fitted against the arc-shaped structures.

[0009] In a preferred embodiment of the present disclosure, the base is stacked on an upper edge of the inner side of the bearing support structure.

[0010] In a preferred embodiment of the present disclosure, the limiting ring is an annular adhesive ring formed of hot-melt adhesive.

[0011] In a preferred embodiment of the present disclosure, an upper end of the body is provided with an inner rim of cup opening, and the inner rim of cup opening has a straight-edged structure.

[0012] In a preferred embodiment of the present disclosure, an outer layer is sleeved over and spaced apart from an outer side of the tapered tubular wall. The outer layer and the body are connected by at least one layer of hot-melt adhesive, which creates a gap between the outer side of the tapered tubular wall and the outer layer. The limiting ring connects the bearing support structure and the outer layer, such that these three components form the support portion.

[0013] In a preferred embodiment of the present disclosure, the body is a paper cup, a paper box, a paper bowl, or a paper bucket.

[0014] The advantageous effects of the present disclosure are as follows:

[0015] The present disclosure provides a non-jamming stackable paper container with a bearing support structure formed on the body. The bearing support structure is reinforced by an outer limiting ring, forming a support portion for stacking the paper containers. This effectively prevents deformation of the bearing support structure caused by stacking pressure and avoids the containers becoming stuck when stacked.

[0016] The non-jamming stackable paper container provided by the present disclosure has a base of the body formed into a flared structure that expands radially outward. When the containers are stacked, this structure resists deformation and prevents the containers from sliding off the bearing support structure during stacking, thereby avoiding the containers becoming stuck.

[0017] The non-jamming stackable paper container provided by the present disclosure has a limiting ring and a hot-melt adhesive that can achieve heat insulation, reducing heat transfer between the body and the outer layer. The body has a straight-edged opening at the cup opening, which facilitates close fitting with a lid, allowing the lid to snap on smoothly and securely without leakage.

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical proposals in the embodiments of the present disclosure, the drawings used in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019]FIG. 1 is a schematic structural diagram of a preferred embodiment of the non-jamming stackable paper container of the present disclosure;

[0020]FIG. 2 is a cross-sectional view of FIG. 1;

[0021]FIG. 3 is a partial schematic diagram of FIG. 1;

[0022]FIG. 4 is a schematic diagram showing the stacked paper containers;

[0023]FIG. 5 is a partial schematic diagram of FIG. 4.

[0024]Reference signs are as follows: 1 body, 2 outer layer, 3 hot-melt adhesive ring, 4 bearing support structure, 5 limiting ring, 6 inner rim of cup opening, 7 base.

DETAILED DESCRIPTION OF EMBODIMENTS

[0025]The technical proposals in the embodiments of the present disclosure will be clearly and completely described below. The structures, proportions, sizes, etc., illustrated in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of the present disclosure. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of the present disclosure, shall fall within the scope of the technical content disclosed in the present disclosure. Furthermore, terms such as “upper”, “lower”, “left”, “right”, and “middle” used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of the present disclosure.

[0026]Referring to FIGS. 1 to 5, provided is a non-jamming stackable paper container, specifically a paper cup. A body 1 of the paper container has tapered converging sidewalls. An outer layer 2 is spaced apart on an outer side of the tapered tubular wall. The outer layer 2 and the body 1 are connected by two spaced-apart hot-melt adhesive rings 3. By arranging multiple hot-melt adhesive rings 3 between the body 1 and the outer layer 2 to separate them, heat transfer within the body 1 is reduced, providing insulation against cold and heat.

[0027]The bottom of the body 1 is formed with a bearing support structure 4, which is a stepped structure formed by inwardly converging from a bottom edge of the body 1. A limiting ring 5 is connected to an outer side of the bearing support structure 4. An inner side and an outer side of the bearing support structure 4 are arc-shaped, and the limiting ring 5 is closely fitted against the arc-shaped structure. The limiting ring 5 connects the bearing support structure 4 and the outer layer 2, such that the three components form a support portion. The limiting ring 5 is a ring formed by hot-melt adhesive. The hot-melt adhesive forming the limiting ring 5 may be processed simultaneously with the aforementioned hot-melt adhesive rings 3. Furthermore, the hot-melt adhesive has a certain strength after cooling, enabling the connection between the body 1 and the outer layer 2, while also strengthening the bearing support structure 4. The hot-melt adhesive serving as the limiting ring 5 not only connects the body 1 to the outer layer 2 but also supports the bearing support structure 4 and is able to limit the movement of paper cups when stacked.

[0028]Of course, using the limiting ring 5 is a lower-cost and easier-to-process embodiment. The limiting ring 5 may also be made of glass, paper, or plastic, as long as it has a certain supporting strength, which can be achieved using conventional processes such as bonding or ultrasonic welding.

[0029]When paper containers are stacked, the base 7 of the body 1 of the upper container is placed on the bearing support structure 4, supporting the upper paper container through the support portion. The base 7 is a flared base 7 expanding radially outward from the bottom of the bearing support structure 4. When paper cups are stacked, the lower end of the base 7 of the upper paper cup is placed on an upper edge of the inner side of the bearing support structure 4 of the lower paper cup, thus supporting the upper paper cup. When multiple paper cups are stacked, the base 7 of the upper paper cup comes into contact with the bearing support structure 4 of the lower paper cup. The limiting ring 5 can improve the support strength of the bearing support structure 4, so that the bearing support structure 4 will not deform and collapse due to excessive pressure when it contacts the base 7, thus ensuring effective stacking of multiple paper cups. At the same time, the base 7 is configured as an outwardly expanding, V-shaped base. This structure increases the strength of the base 7 and prevents the base 7 from sliding into the interior of the bearing support structure 4, thereby avoiding the paper cup from becoming stuck.

[0030]An upper end of the body 1 is provided with an inner rim 6, which is a straight edge. The straight edge facilitates close fitting with a cup lid, allowing the lid to snap on smoothly and securely without leakage.

[0031] In testing, five products were stacked, facing downward on a table, and weights of different masses were placed on the stacked cups for one minute. The test then checked whether a cup could be removed with one hand. The paper cup of the present disclosure could still be easily removed after being subjected to 10 kilograms of compression, whereas the paper cup of Patent No. 202221351019.7 could only be barely removed after 1 kilogram of compression.

[0032] Of course, the paper cups mentioned above may also be replaced with paper boxes, paper bowls, or paper buckets. Hot-melt adhesives with softening temperatures above 100°C may be selected, adapted for paper containers that need to be heated or used to hold high-temperature items.

[0033] Unlike existing technologies, the present disclosure provides a non-jamming stackable paper container that allows for easy stacking of containers. The stacked structure is strong and effectively prevents containers from deforming and jamming when stacked.

[0034]The above provides a schematic description of the present disclosure and its embodiments, which is not intended to be limiting. The embodiments shown in the accompanying drawings represent only one implementation of the disclosure, and the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired thereby and, without departing from the inventive concept of the present disclosure, design structures or embodiments similar to the technical solution without inventive effort, such structures or embodiments should also fall within the scope of protection of the present disclosure.