JPS581018B2 - Paper cup and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper cup with a unique body shape and a method for manufacturing the same.

Conventionally, paper cups have been available only in the form of a truncated cone made of a fan-shaped body blank plate, as shown in FIG. 1, or in the cylindrical shape made of a rectangular body blank plate.

The present invention eliminates the monotony of the shapes of conventional paper cups, and makes it possible to provide paper cups in various shapes such as a trumpet shape as shown in FIG. 3, a tumbler shape as shown in FIG. It is something to tighten.

To explain one embodiment of the present invention with reference to the drawings, FIG. 5 is a plan view of a body blank plate A of a paper cup used in the present invention, and the body blank plate A has a large number of grooved lines 1. It is engraved.

As shown in the enlarged cross-sectional view of FIG. 6, the groove lines 1 are formed so as to protrude relatively shallowly from the side that will become the inner surface of the cup body when a paper cup is made using the body blank board A.

Next, a paper cup B is made using the body blank plate A as shown in FIG.

The method of making it is the same as making a general paper cup, by pasting the body, attaching the bottom, and seaming the rim.

Next, as shown in FIG. 8, the paper cup B is inserted into the female mold W and the male mold M whose bodies are constricted inward, and the body of the paper cup B is pressed from both the inside and outside.

At this time, it is desirable to heat both the male and female molds M and W at 50°C to 90°C.

By means of the male and female molds M and W, the paper cup B is deformed from the shape shown by the dotted line at the opening in FIG. 9A to the shape shown by the solid line.

That is, the height of paper cup B is H1 as shown in Figure 9A.
Also, the diameter of the body cut along the N-N line in Figure 9A is reduced from D1 to D as shown in the opening of Figure 9.
It becomes smaller than 2.

However, the vertical length of the surface of paper cup B, that is, P before deformation
, Q is the same as the lengths of PI, R, and Q after deformation and does not change.

10A and 10B show the state before and after deformation of the groove line 1 near the line N-N in FIG. 9B, that is, near the cross section of the port in FIG.
Although the depth of groove line 1 becomes deeper, SI, U, TI after deformation
The length between them is the same as the length between S and T before deformation and does not change.

Thus, the depth of the groove line 1 is the deepest near the line N--N in FIG. 9A, and becomes shallower as it approaches the bottom and mouth edge.

That is, the overall deformation of the paper cassop B as shown in FIG. It is brought about by the difference.

In the above-mentioned embodiment, the grooves 1 are provided vertically, but the grooves 1 may be horizontal or diagonal as shown in FIG. It may be a curve.

Furthermore, by selecting the shape of the paper cup to be placed in the mold and the type of the mold, it is possible to create the shape shown in FIG. 4 or the shapes shown in FIGS.

The one shown in Figure 4 and the one shown in Figure 12 A are modified truncated conical paper cups;
The cup shown in c.2 is a modified version of a cylindrical paper cup.

Further, the paper cup used in the present invention may be made of paper only, or may be made of paper laminated with polyethylene, aluminum foil, etc. on one or both sides.

Since the present invention has the above-described configuration, it is possible to produce a paper cup with a new shape that has not been produced to date very easily and at a low cost. Not only is it aesthetically pleasing, but it also does not slip when held in the hand, and for example, in the case of a trumpet-shaped drink as shown in Figure 3, the angle at which it is tilted at the mouth when drinking is different from the conventional one. It has various advantages such as being convenient because it requires less than the usual amount.

[Brief explanation of the drawing]

1 and 2 are side sectional views of a conventional paper cup,
3 and 4 are side sectional views of a paper cup according to the present invention, and FIGS. 5 to 10 show an embodiment of the present invention,
FIG. 5 is a plan view of the body blank plate A used for manufacturing the paper cup according to the present invention, FIG. 6 is a partially cutaway enlarged sectional view of the body blank plate A, and FIGS. 7 and 8 are respectively A perspective view and a side view showing the state in the middle of production, Fig. 9A is a side sectional view explaining the state before and after deformation by the mold, Fig. Figure 10A, mouth is a partially cutaway enlarged sectional view illustrating the state before and after deformation by the mold in the mouth part of Figure 9, and Figure 11B, mouth and mouth,
Figures A, C, and II are side views showing other embodiments of the present invention, respectively. Explanation of the symbols representing the main parts of the figure, A... Body blank board, B... Paper cup, M...
・Male mold, W...Female mold, 1...Groove line.

Claims (1)

[Scope of Claims] 1. A paper cup having grooves that are deep in the constricted part of the cup body, shallow in the bulging part, and protrude toward the inside of the body wall. 2 A large number of grooves are provided on a body blank plate, the body blank plate is rolled up so that the grooves protrude inward, and the side edges are pasted together to form a cup with a part of the body constricted. A method for producing a paper cup by inserting the body blank board with the rolled and side edges pasted into a body forming mold, pressing it from both the inside and outside with male and female molds, and attaching a bottom paper. .