CORRUGATED PAPER CUP

Abstract

Disclosed is a double-layer corrugated paper cup applicable to unmanned full-automatic manufacturing. The corrugated paper cup comprises a cup body formed by rolling a fan-shaped sheet, the fan-shaped sheet having a first straight edge and a second inclined edge, a first end of the single-layer corrugated paper is staggered with and parallel to a first end of the inner cup paper and a second end of the single-layer corrugated paper is flush with a second end of the inner cup paper, a corrugated cavity region of the fan-shaped sheet is flattened to form a first extruded corrugated cavity region and a thickness of the first extruded corrugated cavity region is smaller than that of a middle part of the fan-shaped sheet and a part of the first extruded corrugated cavity region is rolled outwardly together with the inner cup paper to form a rolled rim.

Claims

1. A corrugated paper cup, comprising: a cup body formed by rolling a fan-shaped sheet, the fan-shaped sheet having a first straight edge, a second inclined edge, an upper arc edge and a lower arc edge, and the fan-shaped sheet comprising inner cup paper and single-layer corrugated paper adhered to an outer peripheral surface of the inner cup paper; wherein a first end of the single-layer corrugated paper is staggered with and parallel to a first end of the inner cup paper to form the first straight edge and a second end of the single-layer corrugated paper is flush with a second end of the inner cup paper to form the second inclined edge of the fan-shaped sheet; a corrugated strip of the fan-shaped sheet unfolded is a transverse stripe in a direction from the first straight edge to the second inclined edge; when the fan-shaped sheet is rolled to form the cup body, the second inclined edge and the first straight edge of the fan-shaped sheet are laminated to form a seam region in which at least three layers of papers are adhered; and a corrugated cavity region of the fan-shaped sheet close to the upper arc edge is flattened to form a first extruded corrugated cavity region and a thickness of the first extruded corrugated cavity region is smaller than that of a middle part of the fan-shaped sheet and a part of the first extruded corrugated cavity region is rolled outwardly together with the inner cup paper to form a rolled rim.

2. The corrugated paper cup according to claim 1, wherein the single-layer corrugated paper between the upper arc edge and the lower arc edge of the fan-shaped sheet is flush with the inner cup paper, a corrugated cavity region of the fan-shaped sheet close to the lower arc edge is flattened to form a second extruded corrugated cavity region and a thickness of the second extruded corrugated cavity region is smaller than that of the middle part of the fan-shaped sheet , and a part of the second extruded corrugated cavity region is folded inwardly together with the inner cup paper to form a cup pedestal.

3. The corrugated paper cup according to claim 2, wherein after the region of the fan-shaped sheet close to the upper arc edge or the lower arc edge is flattened, folds are formed on the first or/and second flattened corrugated cavity region, and the folds are rolled into the rolled rim or the cup pedestal.

4. The corrugated paper cup according to claim 3, wherein a thickness of the inner cup paper is greater than that of the single-layer corrugated paper.

5. The corrugated paper cup according to claim 3, wherein a corrugation of the single-layer corrugated paper is a straight stripe, and the straight stripe is in a direction perpendicular to the first straight edge.

6. The corrugated paper cup according to claim 3, wherein a corrugation of the single-layer corrugated paper is a transverse wavy stripe along the first straight edge to the second inclined edge.

7. The corrugated paper cup according to claim 3, wherein a corrugation of the corrugated paper is a discontinuous corrugated cavity transversely distributed along the first straight edge to the second inclined edge, which comprises a circle-dot corrugated cavity or a rectangular corrugated cavity.

8. The corrugated paper cup according to claim 1, wherein the first straight edge of the fan-shaped sheet has an inner cup paper region which is not covered by the single-layer corrugated paper, the region is an adhering portion, and when the second end of the inner cup paper is adhered to an outer side surface of the first end of the corrugated paper, the edge region comprises a four-layer reinforced structure formed by the second end of the corrugated paper, the second end of the inner cup paper, the first end of the corrugated paper and the first end of the inner cup paper, and a three-layer water-tight structure formed by the second end of the corrugated paper, the second end of the inner cup paper and the adhering portion.

9. The corrugated paper cup according to claim 1, wherein the first straight edge of the fan-shaped sheet has an inner cup paper region which is not covered by the single-layer corrugated paper, the region is an adhering portion, and when the second end of the inner cup paper is only adhered to the adhering portion, the first end of the corrugated paper and the second end of the corrugated paper are aligned with each other or have a gap, and the edge region comprises a three-layer water-tight structure formed by the second end of the corrugated paper, the second end of the inner cup paper and the adhering portion.

10. The corrugated paper cup according to claim 8, wherein a waterproof layer is arranged on an inner wall of the inner cup paper, and when the adhering portion is overlapped on an inner side surface of the second end of the inner cup paper to form sealed adhesive connection, one end of the waterproof layer is connected with a main body of the waterproof layer.

11. The corrugated paper cup according to claim 10, wherein the paper cup further comprises a cup bottom, an adhering layer is arranged on the cup bottom, the lower arc edge of the fan-shaped sheet is extruded to form a bending region, an end portion of the bending region is bent inwardly to form a folding layer, and the adhering layer is hermetically adhered between the bending region and the folding layer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 is a stereoscopic diagram of First Embodiment of the present application.

[0026] FIG. 2 is a schematic diagram of a semi-section of FIG. 1.

[0027] FIG. 3 is an enlarged view of a part B in FIG. 2.

[0028] FIG. 4 is an enlarged view of a part A in FIG. 2.

[0029] FIG. 5 is a schematic structural diagram of a double-layer paper cup of FIG. 1 after being fully unfolded.

[0030] FIG. 6 is a schematic diagram of a multi-layer composite structure of a cup body of the double-layer paper cup before edge sealing.

[0031] FIG. 7 is a schematic structural diagram of a cross-section of a part C-C in FIG. 2.

[0032] FIG. 8 is a schematic structural diagram of a cross-section of a part D-D in FIG. 2, which is namely a schematic diagram of a specific structure of a rim rolling region of a cup rim of the double-layer paper cup after being compressed by the same thickness as the cross-section of the part C-C.

[0033] FIG. 9 is a schematic diagram of an enlarged structure of a joint part of the double-layer paper cup.

[0034] FIG. 10 is a schematic diagram of an enlarged structure of a joint part of a double-layer paper cup in Second Embodiment.

[0035] FIG. 11 is a diagram of a placement position of a fan-shaped sheet after cutting, which forms FIG. 5 after adjustment.

DETAILED DESCRIPTIONS OF THE EMBODIMENTS

[0036] The following are specific embodiments of the present application, and the technical solution of the present application is further described with reference to the drawings, but the present application is not limited to these embodiments.

[0037] First Embodiment

[0038] As shown in FIG. 1 and FIG. 5, a paper cup 1 has a hollow flared cup structure, and comprises a cup body formed by rolling a fan-shaped sheet 11. The fan-shaped sheet 11 comprises a first straight edge 111, a second inclined edge 112, an upper arc edge 113 and a lower arc edge 114. The first straight edge 111 and the second inclined edge 112 are adhered to form an edge region 4. The paper cup 1 further comprises a rolled rim 51 and a cup bottom 6. An outer surface of the cup body is corrugated, the corrugated structure has anti-skid and anti-scalding functions, and the corrugated structure is joined at the edge region 4 of the paper cup 1, thus enhancing a structural strength of the paper cup 1.

[0039] As shown in FIG. 2, the cup body consists of a waterproof layer 8, inner cup paper 2, a glue layer 9 and corrugated paper 3 from inside to outside. A thickness of the inner cup paper 2 is greater than that of the corrugated paper 3, so that the inner cup paper 2 is a main load-bearing structure, and the inner cup paper 2 can ensure a stiffness of the paper cup 1 and enhance a connection strength of the paper cup 1. The corrugated paper 3 has a corrugated structure of a transverse stripe, and a concave part of the corrugated structure of the corrugated paper 3 is adhered to the inner cup paper 2 through the glue layer 9. A rim rolling region 5 is arranged above the paper cup 1, and a bending region 7 is arranged below the paper cup 1. A thickness of the rim rolling region 5 is smaller than that of the cup body, and an upper part of the rim rolling region 5 is rolled to form the rolled rim 51. The rolled rim 51 facilitates enhancement of strength of the cup rim, and also facilitates drinking.

[0040] Specifically, as shown in FIG. 3, an adhering layer 62 is arranged on the cup bottom 6, the bending region 7 is obtained by extruding the cup body, a folding layer 71 is formed by bending an end portion of the bending region 7, and the adhering layer 62 is placed between the bending region 7 and the folding layer 71 to be adhered and fixed, so that the cup bottom 6 is fixed on a main body of the paper cup 1. The adhering layer 61 is located between the bending region 7 and the folding layer 71 to support the cup bottom 6, so that connection between the cup bottom 6 and the main body of the paper cup 1 is more stable, and a sealing performance between the cup bottom 6 and the main body of the paper cup 1 is better, thus being not easy to leak water.

[0041] As shown in FIG. 4, the rim rolling region 5 is obtained by extruding the cup body, an end portion of the rim rolling region 5 is rolled to form the rolled rim 51, and the rest part of the rim rolling region is a cup wall 52 of the cup body after extrusion. The cup wall 52 has sufficient strength due to multi-layer composition.

[0042] The fan-shaped sheet 11 is shown in FIG. 5, and after the molded paper cup is torn, the unfolded cup body is the fan-shaped sheet, which is cut from a sheet shown in FIG. 11. A specific process comprises: pressing a corrugation of a straight stripe on the paper 3, wherein the straight stripe is in a direction perpendicular to a pulling direction of the paper, then arranging an edge of the single-layer corrugated paper 3 to be staggered with and parallel to an edge of the inner cup paper 2, adhering and compounding the corrugated paper and the inner cup paper together by two composite rollers, then cutting a first end 21 of the inner cup paper to form a first straight edge 111 of the fan-shaped sheet 11, and cutting a second inclined edge 112, an upper arc edge 113 and a lower arc edge 114 together with the first straight edge 111 to form the fan-shaped sheet 11 shown by a solid line in FIG. 11. In this way, unmanned automatic manufacturing may be realized. Therefore, as shown in FIG. 5 and FIG. 6, the corrugated paper 3 has a single-layer corrugated structure without backing paper, and the corrugated paper has a corrugation of a straight stripe, wherein the straight stripe is in a direction perpendicular to the first straight edge 111. The corrugation of the transverse stripe has a certain extensibility even if the corrugation has not been stretched in a transverse direction, thus meeting a structural requirement that a simplified structure is applicable to unmanned manufacturing. As an alternative solution, the corrugation of the corrugated paper is a transverse wavy stripe along the first straight edge to the second inclined edge, which also meets a requirement of composite extensibility, or is replaced by a discontinuous corrugated cavity transversely distributed, which comprises a circle-dot corrugated cavity or a rectangular corrugated cavity.

[0043] The single-layer corrugated paper 3 is adhered to a fan-shaped outer peripheral surface of the inner cup paper 2, a fan-shaped length of the inner cup paper 2 is greater than that of the corrugated paper 3, and a first end 31 of the corrugated paper is staggered with and parallel to the first end 21 of the inner cup paper, so that the first straight edge 111 of the fan-shaped sheet 11 has an inner cup paper region which is not covered by the corrugated paper, and the region is an adhering portion 211. The corrugated paper 3 among the second inclined edge 112, the upper arc edge 113 and the lower arc edge 114 of the fan-shaped sheet is flush with the inner cup paper 2, and then the corrugated paper and the inner cup paper are extruded at the upper arc edge 113 to form the rim rolling region 5, and extruded at the lower arc edge 114 to form the bending region 7.

[0044] The state of FIG. 5 is obtained through FIG. 6 and FIG. 9. FIG. 6 shows a multi-layer structure of the cup body, comprising the waterproof layer 8, the inner cup paper 2 and the corrugated paper 3 respectively, wherein the waterproof layer 8 is located on an inner side of the paper cup 1, the waterproof layer 8 is adhesive, and adhered and fixed to the inner cup paper 2, and the waterproof layer 8 and the inner cup paper 2 have the same shape and size, so that an inner wall of the paper cup 1 is covered with the waterproof layer 8 after the paper cup 1 is folded and molded, thus ensuring the sealing performance of the paper cup 1. As shown in FIG. 9, through the state of FIG. 6, the fan-shaped sheet 11 is rolled and connected to form the edge region 4 shown in FIG. 9. Specifically, the first end 31 of the corrugated paper is overlapped with the second end 32 of the corrugated paper, and an overlapping position is staggered with the adhering portion 211. The edge region 4 comprises a four-layer reinforced structure formed by the second end 32 of the corrugated paper, the second end 22 of the inner cup paper, the first end 31 of the corrugated paper 3 and the first end 21 of the inner cup paper, and a three-layer water-tight structure formed by the second end 32 of the corrugated paper, the second end 22 of the inner cup paper and the adhering portion 211. The edge region 4 after adhesion is extruded to form a multi-layer reinforced layer, thus having a supporting beam function.

[0045] The fan-shaped sheet 11 in FIG. 6 is rolled and adhered to form the cup body, and a cross-section shape of the cup body is shown in FIG. 7. The glue layer 9 is also arranged between the inner cup paper 2 and the corrugated paper 3, the concave part of the corrugated paper 3 with the corrugated structure is adhered and fixed to the inner cup paper 2 through the glue layer 9, and a convex part of the corrugated paper 3 with the corrugated structure forms a heat insulation cavity. The structure of FIG. 6 is extruded in the rim rolling region 5 to form the extruded structure of FIG. 8. When the rim rolling region 5 is extruded, folds are formed on the convex part of the corrugated paper 3, and the folds enhance the strength of the rim rolling region 5, thus preventing the rolled rim 51 from being deformed during use. At the moment, a part of the rim rolling region enhanced by the folds is rolled to form the rolled rim 51. The folds are rolled together into the rolled rim 51, and the rolled rim 51 has a good structural strength.

[0046] A principle of the solution is as follows: when the paper cup 1 is molded, the adhering portion 211 is overlapped with an inner side surface of the inner cup paper 2 first, and then the second end 22 of the inner cup paper is overlapped with the first end 31 of the corrugated paper, so that the paper cup 1 is transited evenly at a joint, thus avoiding the first end 31 of the corrugated paper from being directly connected with a main body of the inner cup paper 2. In an overlapping region 4, an end surface of the first end 31 of the corrugated paper abuts against the waterproof layer 8, and one end of the glue layer 9 abuts against the waterproof layer 8, thus improving a sealing performance and a connection strength of the overlapping region 4. When the rolled rim 51 and a cup pedestal 61 of the paper cup 1 are formed, there are many layers at the overlapping portion that are not easy to be rolled, so that the paper cup 1 is extruded to form the rim rolling region 5 and the bending region 7, and strength weakening caused by extrusion is compensated by the folds of the corrugated paper 3.

[0047] Second Embodiment

[0048] Second Embodiment is basically the same as First Embodiment, except that the edge region 4 is a connection structure. Specifically, as shown in FIG. 10, the first end 31 of the corrugated paper is connected with the second end 32 of the corrugated paper, and a connection position is located on one side of the adhering portion 211, or there is a gap between the first end 31 of the corrugated paper and the second end 32 of the corrugated paper. The edge region 4 consists of three layers formed by the second end 32 of the corrugated paper, the second end 22 of the inner cup paper and the adhering portion 211, and two layers formed the first end 31 of the corrugated paper and the first end 21 of the inner cup paper. Compared with the edge region 4 in First Embodiment, although a number of layers is reduced, there is still sufficient strength to maintain the strength of the rim rolling region 5, because the inner cup paper 2 is thick and has sufficient strength.

[0049] Third Embodiment

[0050] Third Embodiment is basically the same as First Embodiment or Second Embodiment, except that the corrugated paper 3 has a plane structure, and the corrugated paper is tin paper, plastic paper, silicone paper, glass paper or asphalt paper capable of being designed in various shapes. Because the inner cup paper 2 is thick, after the edge sealing structure is rolled together with outer-layer paper to form the rolled rim, there is still sufficient strength.

[0051] The specific embodiments described herein are merely illustrative to the scope of the present application. Those skilled in the technical field to which the present application belongs may make various modifications or supplements to the specific embodiments described or make substitutions in a similar way, without departing from the scope of the present application or exceeding the scope defined by the appended claims.