JPH03212233A - Filtration paper cup and its manufacturing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a filter paper cup for extracting coffee liquid, etc. by placing powder such as coffee beans and pouring hot water over the powder, and a method for manufacturing the same. It is related to.

[Prior Art] Conventionally, as a simple means for extracting coffee liquid or the like from powder of coffee or the like, a method using a filter paper cup 21 as shown in FIG. 9 has been known.

This paper cup 21 for filtration has a bottom paper 23 made of filter paper provided at the bottom of a paper body 22, and is manufactured in the same manner as a normal paper cup using a so-called paper cup machine. 22 and the bottom paper 23, as shown in FIG.
4 faces downward and is bonded to the paper shell 22.

11(a) to (f) show the steps of a typical conventionally known method for manufacturing such a filter paper cup 21.
). First, after the bottom paper 23 made of filter paper is punched out, as shown in FIG. This bottom paper 23 is placed on a predetermined position on the female mold 27, and then, as shown in FIG. While the part 24 is formed, the male mold 25
be transferred to the top of the page. Subsequently, as shown in FIG. 11(C), the cylindrically rolled body paper 22 is placed over the male mold 25 on which the bottom paper 23 is placed, and then ), a bottom is formed through the following steps: heating the bottom adhesive portion 28, curling the bottom adhesive portion 28, and tightening the bottom using the eccentric roller 30 and ring 31, and a filter paper cup is manufactured.

[Problems to be Solved by the Invention] In the conventional manufacturing method described above, the bottom paper 23 made of filter paper tends to return to its original flat state after the drawing process in the step shown in FIG. 11(b). 11(e), the open upright part 24 contacts and rubs against the inner surface of the paper shell 22, and the paper shell 22 forms the male mold 25.
cover over. In this case, the bottom paper 23 is very soft and has low rigidity compared to the bottom paper of a general paper cup, so the body paper 23
The upright portion 24 is pulled in the opposite direction due to the friction, and as shown in FIGS. 12 and 13, so-called "mekure A" is likely to occur. When the bending A occurs, there is a problem in that a defective product is produced in which a portion of the upright portion 24 is bent in the opposite direction.

The present invention solves the above-mentioned problems, and aims to make it possible to stably manufacture a filter paper cup free from creases even when a filter paper with low rigidity is used as the bottom paper.

[Means for Solving the Problems] In order to achieve the above object, the filter paper cup of the present invention includes a body paper whose inner surface is coated with an adhesive resin, and a surrounding upright portion coated with the adhesive resin. A filtration paper cup formed of a bottom paper made of filter paper adhered to the inner surface of the bottom of a body paper, characterized in that the upright direction of the upright part of the bottom paper is directed toward the upper opening side of the cup. be.

The manufacturing method is such that after punching out the bottom paper, a female-shaped drawing die is used to insert the bottom paper into a male die shaped like the inner surface of a cup and fit the bottom paper from above. forming the upright portion downward around the bottom paper along the line, and then covering the body paper rolled into a cylindrical shape from above;
After preheating the inner wall of the bottom paper, it is lowered to a predetermined position, and the rising part of the bottom paper is adhered to the inner wall of the shell paper by the pressing force of the paper shell against the male die, and then the bottom paper is heated toward the male die. It is characterized in that the upright portion is reliably bonded to the inner wall of the paperboard using a core that opens and closes radially.

In another manufacturing method, after the bottom paper is punched out, the male die is inserted into a male die shaped like the inner surface of a cup using a female-shaped drawing die that is fitted from the side with the bottom paper sandwiched therebetween. The raised portion is formed around the bottom paper along the mold, and the raised portion is adsorbed by a vacuum hole provided on the side surface of the male mold, and then the adhesive portion with the raised portion is heated in advance. After supplying the paper shell, which can be fused to the lower surface of the male mold, the paper shell has an inner surface shape that matches the male mold in consideration of paper thickness, and is opened and closed on the side surface of the male mold. The present invention is characterized in that a pair of semi-cylindrical female molds is used to wrap the paper shell, and the upright part and the inner surface of the paper shell are bonded, and a shell seal core is used to attach the paper shell to the shell.

[Operations] The filtration paper cup of the present invention is produced without causing any creases on the bottom paper.

That is, in the manufacturing method, the upright part of the bottom paper is formed downward and the body paper is placed over it.
Since the paper trunk is advanced to a predetermined position while being rubbed in the same direction as the direction in which the upright portion is raised, no force that would cause the upright portion to crease is exerted.

In addition, in another manufacturing method, the body paper is wrapped with the raised part of the bottom paper being attracted by a vacuum hole provided on the side of the male mold, so this method also causes creases in the raised part. The bottom is molded without any problems.

"Example code" Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a partial sectional view of a filter paper cup according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the main part in FIG. 1.

As shown in FIG. 1, the filter paper cup 1 includes a paper body 2
and a bottom paper 3. The body paper 2 is made of cup base paper used for ordinary paper cups, and its inner surface is coated with polyethylene, which is an adhesive resin. The bottom paper 3 is made of a filter paper that is slightly larger than the horizontal cross-sectional shape at the bottom of the paper shell 2, and the slightly larger portion forms an upright portion 4 around the bottom paper 3 and is glued to the inner surface of the paper shell 2. There is.

As clearly shown in FIG. 2, the upright portion 4 of the bottom paper 3 is adhered to the inner surface of the body paper 2 with its upright direction facing toward the upper opening of the cup 1.

In this case, the upright portions 4 are bonded to the inner surface of the paper shell 2 by heating the polyethylene coated on the inner surface of the paper shell 2 and pressing the raised portions 4 together.

Next, the manufacturing method of this filter paper cup 1 is shown in FIG. 3(a).
This will be explained using the molding steps shown in ~(5).

First, after punching out the bottom paper 3 made of filter paper with a cutter,
As shown in Figure (a), the male mold 5 has the inner shape of a cup.
The bottom paper 3 is set in a bottom paper receiver 7 located between the male die 5 and a female-shaped drawing die 6 which is fitted from above with the bottom paper 3 interposed therebetween.

This drawing die 6 is designed to fit into the male die 5 taking into account the thickness of the bottom paper 3. Next, as shown in FIG. 3, etc., by lowering the drawing die 6, the bottom paper 3 is passed onto the male die 5, and at the same time, the periphery of the bottom paper 3 is drawn along the male die 5 by drawing. A standing portion 4 is formed downward. After the drawing die 6 is raised and separated, in the next step shown in FIG. 3(C), the cylinder paper 2 wound into a cylindrical shape is placed over it. In this case, since the bottom paper 3 made of filter paper has a tendency to return to its original flat state, the upright part 4 opens when the drawing die 6 is removed, but the rising direction of the bottom paper 3 and the covering direction of the body paper 2 Since they match, the paper shell 2 covers the male die 5 without causing any creases in the upright portion 4. Subsequently, as shown in FIG. 3(6), the inner wall of the paperboard 2 is heated with the part corresponding to the adhesive part 8 of the upright part 4 floating, and then the upper part of the inner wall of the paperboard 2 is heated.
), it is lowered to a predetermined position and the upright portion 4 of the bottom paper 3 is adhered to the inner wall of the paper shell 2 by the pressing force of the paper shell 2 against the male mold 5. Further, in order to ensure the adhesion, as shown in FIG. 3(f), the upright portion 4 is bonded to the inner wall of the paperboard 2 using a core 9 that opens and closes radially toward the male mold 5. Thereafter, the molding of the bottom is completed through a bottom curling step shown in FIG. 3 and a bottom tightening step using an eccentric roller 10 and a ring 11 shown in FIG.

The drawing die 6 shown in FIGS. 3(a) and 3(a) is equipped with a built-in heater to heat the bottom paper 3 during the drawing process in order to further improve the shape retention of the bottom paper 3 made of filter paper. You can. In addition, the core 0 shown in FIG. 3(f) also has a built-in heater, so that the body paper 2 and the bottom paper 3 are heated by themselves.
It is also possible to glue them together.

In addition, as shown in FIG. 4, a relief part 12 is provided at the tip of the male mold 5 in consideration of the thickness of the upright part 4 of the bottom paper 3, so that when the shell paper 2 is lowered to a predetermined position, the shell paper 2 The entire inner wall of the mold 5 may be brought into contact with the side surface of the male mold 5. If you do this,
Since the paper shell 2 is firmly fixed to the male die 5, subsequent steps can be carried out stably.

Moreover, the shape of the bottom of the filtration paper cup 1 of the present invention is as follows:
As long as the upright direction of the upright part 4 of the bottom paper 3 faces toward the upper opening side of the cup, other than the shape explained in the above embodiment,
For example, the shape shown in FIGS. 5 to 7 may be adopted, and the cross-sectional shape of the cup may be rectangular or the like in addition to being round.

Next, another method of manufacturing the filter paper cup 1 is shown in FIG.
This will be explained using the molding steps shown in ) to (f).

First, after punching out the bottom paper 3 made of filter paper with a cutter,
As shown in Figure (a), the male mold 5 has the inner shape of a cup.
The bottom paper 3 is set in the bottom paper receiver 7 located between the male die 5 and a female-shaped drawing die 6 which is fitted from the side with the bottom paper 3 in between.

This drawing die 6 is designed with a male die 5' taking into consideration the thickness of the bottom paper 3.
It is designed to fit. Thereafter, as shown in FIG. 8 (company), by moving the drawing die 6 toward the male die 5', the bottom paper 3 is passed to the male die 5°, and at the same time, the male die 5 is A horizontal standing portion 4 is formed around the bottom paper 3 along the angle. Here, the bottom paper 3 is sucked by vacuum holes 13, 14 provided on the bottom and side surfaces of the male mold 5°. After the drawing die 6 is separated, as shown in Fig. 8 (C
) and its D-D cross section, the paper shell 2 whose adhesive part with the upright part 4 has been heated in advance so that it can be fused is supplied to the lower surface of the male mold at 5 degrees. Then, continue with Figure 8 (
As shown in e), a pair of semi-cylindrical female molds 15.16
The wrapping paper 2 is wrapped by the following steps. Female mold 15.16 is body paper 2
It has an inner surface shape that matches the male mold 5'' in consideration of the paper thickness, and is designed to open and close against the side of the male mold 5'.Then, as shown in FIG. 8(f) As in, female type 15
, 16 wrap the paper shell 2 and adhere the upright portion 4 to the inner surface of the paper shell 2, and the shell seal core 17 performs the shell bonding to complete the bottom molding.

Note that the shape of the bottom of the filter paper cup 1 produced by the latter manufacturing method is similar to that described in the previous manufacturing method, such that the upright direction of the upright portion 4 of the bottom paper 3 faces toward the upper opening side of the cup. In addition to the shape shown in FIG. 1, the shape shown in FIGS. 5 to 7, for example, may be adopted as long as the shape is suitable.

[Effects of the Invention] As explained above, the filtration paper cup of the present invention has the upright part of the bottom paper that adheres to the inner wall of the body paper facing toward the upper opening of the cup. Even when the bottom paper is used, there is no crease in the upright portion during the molding process, so it is possible to stably produce a good product with no crease in the bottom filter paper.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view of a filter paper cup which is an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the dotted line portion in FIG. 1,
3(a) to 0 are process diagrams showing the method for manufacturing the filter paper cup shown in FIG. 1, FIG. 4 is a cross-sectional view showing another example of the male mold, and FIGS. 5 to 7 are diagrams of the present invention. Fig. 8 is a process diagram showing another method of manufacturing the filtration paper cup, Fig. 9 is a diagram showing how the filtration paper cup is used, Fig. 10 11 is a partially enlarged sectional view of the bottom of a conventional filtration paper cup, FIGS. 11(a) to 11(f) are molding process diagrams of a conventional filtration paper cup, and FIG. 12 is a filtration paper cup in which the bottom paper has become loose. FIG. 13 is a perspective view of the bottom portion of the device, and FIG. 13 is a sectional view as well.

Claims (3)

[Claims] (1) A filter paper cup formed of a paper shell whose inner surface is coated with an adhesive resin, and a bottom paper made of filter paper whose surrounding upright portion is adhered to the bottom inner surface of the paper shell with the adhesive resin. A filtration paper cup according to claim 1, wherein the upright portion of the bottom paper is oriented toward the upper opening side of the cup. (2) A filter paper made of a paper shell whose inner surface is coated with an adhesive resin, and a surrounding standing portion that is adhered to the bottom inner surface of the paper shell with the adhesive resin with the rising direction facing toward the upper opening of the cup. In the method for manufacturing a filter paper cup formed of a bottom paper made of Form the upright portion downward around the bottom paper along the male die with a drawing die in the shape of a die, and then
The body paper rolled into a cylindrical shape is placed on top of the body paper, and after preheating the inner wall of the body paper, it is lowered to a predetermined position and the rising portion of the bottom paper is pressed against the male die by the pressing force of the body paper against the male die. A method for manufacturing a filter paper cup, characterized in that the upright part is firmly adhered to the inner wall of the paper shell by means of a core that opens and closes radially toward the male mold. (3) A filter paper made of a paper shell whose inner surface is coated with an adhesive resin, and a surrounding standing portion that is adhered to the bottom inner surface of the paper shell with the adhesive resin, with the rising direction facing toward the upper opening of the cup. In the method for manufacturing a filter paper cup formed of a bottom paper made of The upright portion is formed around the bottom paper along the male die using a drawing die in the shape of a mold, and the upright portion is sucked by a vacuum hole provided on the side surface of the male die, and then the above-mentioned After supplying the paper shell whose adhesive part with the upright part can be heated and fused onto the lower surface of the male die, A pair of semi-cylindrical female molds that open and close on the sides of the mold are used to wrap the paper shell and bond the upright part to the inner surface of the paper shell, and a shell seal core is used to attach the paper shell. A method for manufacturing a filter paper cup.