JPH0459212B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pot-shaped container with a handle made of a fibrous material such as paper.

(Prior Art) In this type of pot-shaped container, the body plate is closed by an overlapping part, and this overlapping part is
The inner layer and the outer layer of the overlapping portion are mechanically firmly joined, and the outer layer of the overlapping portion includes at least a handle that is not joined to the inner layer and can be folded back to the outside.

In a well-known pot-shaped container of this kind (US Pat. No. PS20 60 781), the entire area of this overlapping part of the shell is glued together, but the above-mentioned handle, which can be folded back to the outside, is , are excluded from this junction. In this way, it is technically not difficult to apply adhesive to the overlapping portion of the body plates and apply pressure to join them without applying adhesive to the handle portion.

However, in order to manufacture such a pot-shaped container, it is necessary to apply adhesive to the overlapping parts of the body plates, excluding the handle part, and apply pressure to join them, which increases the number of man-hours and reduces manufacturing efficiency. I had a problem with it being low.

Therefore, by using a fiber material such as paper covered with a sealing layer that has heat-welding properties, and applying heat to the overlapped part while applying pressure to the overlapped part, the overlapped part is thermally welded by the above-mentioned sealing layer. Some proposals have also been made to do so.

This method eliminates the need to apply adhesive, so the production efficiency of the pot-shaped containers can be greatly improved.

However, in such a cup-shaped container,
It is difficult to selectively heat the overlapping part except for the handle part so that the handle part is not joined to the overlapping part, and when the overlapping part is joined, the handle part is joined to the overlapping part. This often resulted in a problem of low yield.

Modern machines for manufacturing pot-shaped containers require high operating rates, so the temperature of the welding tool is set high to join the overlapping parts. For this reason, not only is it more common for the handle to be joined to the overlapping part, but if the body plate is made of a material such as paper that is easily affected by heat, the overlapping part will discolor due to the heat. There was also the problem of browning.

In order to solve this problem, if the joining temperature is lowered when joining the overlapping parts, there is a problem that the joining strength of the overlapping parts decreases and the reliability of the joining of the overlapping parts decreases.

In order to solve the above problems, it is possible to use ultrasonic welding, but the overlapping part
As mentioned above, since it has a large area including the handle forming part and is curved, there is a region that is inclined with respect to the direction of action of the ultrasonic waves, and the overlapping parts are ultrasonically welded at once. I can't do it.

Therefore, in order to weld the overlapping parts at once, an expensive ultrasonic welding device having many welding stations is required.

(Objective of the Invention) An object of the present invention is to prevent welding of the handle portion to the overlapping portion and discoloration of the overlapping portion due to heat when the overlapping portions are welded, and to provide a pot-shaped container with a handle that has high manufacturing efficiency. The goal is to provide the following.

(Structure of the Invention) The present invention is based on the following considerations.

A qualitatively high-quality bond is required at only one point in the entire overlap, namely at the boundary of the overlap into the internal space of the container, where a seal is required for the medium contained in the container. However, in the remaining area of the overlap, a weaker joint is sufficient, ensuring only sufficient mechanical strength of the handle. Based on this basic idea, costly joining techniques, such as ultrasonic welding, need to be applied only at the above-mentioned joints at the border of the overlapping part to the container interior space, while the rest In the range of , a simpler and less costly thermal welding process can be applied.

The present invention has been made based on the above consideration, and the body plate of the pot-shaped container is closed by an overlapping part, and this overlapping part has an inner layer and an outer layer of the overlapping part. a paper or the like, which exhibits a thick and mechanically strong bond between the two, and which, in this outer layer, within the area forming this bond, includes at least an outwardly foldable handle that is omitted from this bond. In the cup-shaped container made of a fiber material, the fiber material is coated with a heat-fusible sealing layer, and the overlapping portion is bonded to the inner surface of the body plate of the overlapping portion. A first joint portion having strong joint strength is located at an edge bordering on the outer surface of the shell plate, and a first joint portion having a strong joint strength is located at an edge bordering on the outer surface of the body plate of the above-mentioned overlapping portion. A second joint portion having lower joint strength is included.

The second joint and/or the intermediate strip of the handle, in one embodiment of the invention, comprises an extension that is included in the mouthpiece.

In another embodiment of the present invention, the overlapping portions are bonded at one or more locations on the upper edge of the overlapping portion and/or the lower edge of the overlapping portion. Includes a joint.

Furthermore, in a further embodiment of the invention, the intermediate thin plate part of the handle is connected at its lower end to the base plate foot part in the area of pressure of the bottom plate edge.

Furthermore, the cut-out portion including the handle extends over at least about 120 degrees (corner 18) in yet another embodiment of the invention.

Furthermore, in yet another embodiment of the present invention, the first joint is welded by ultrasonic welding, and the second joint or other joint is welded by thermal welding. be done.

(Effects of the Invention) According to the present invention, the body plate made of a fiber material covered with a sealing layer having thermal welding property has a strong Since it is partially joined at the first joint having a high joint strength and the second joint having a lower joint strength at the edge bordering the outer surface of the body plate of the above-mentioned overlapping part, The joining area is small, the number of joining work steps is reduced, and the body plates can be efficiently joined at the overlapped parts by providing necessary and sufficient strength in the parts that require strength, and when welding the overlapped parts. Additionally, it is possible to eliminate welding of the handle portion to the overlapping portion and discoloration of the overlapping portion due to heat.

EXAMPLES The invention will be explained in more detail below with reference to the drawings which show preferred embodiments.

The tip shown in FIGS. 1 and 2 consists of paper coated on the inside with polyethylene. This cot includes a body plate 1 equipped with a mouthpiece 2 and a bottom plate (not shown), and the height of this bottom plate is as follows:
The downwardly bent edge of this bottom plate, indicated by the dashed line 3, is pressed together with the lower edge of the shell plate 1 at the bottom plate foot 4 of the tip. The body plate cutting mold includes a cutting mold part 5 which forms the body of the actual container and is closed by a first joint 6 which is completed as a thick joint. . In addition, this body plate cutting type has two handle parts 8
It also includes a cutting mold part 7 containing. This handle part 8
is shown by a dashed line, and is connected to the intermediate thin plate part 10 on a folding line 9 which is provided in advance, and can be folded back outward from this cutting mold part 7. The cutting mold part 7 extends into an area 11 located opposite the cutting mold part 5. This area 11 serves for the formation of the second joint 12. The cut-out part 4 together with the first joint 6 forms the outer layer of the overlapping part, the extent of which is indicated by the corner 18 in FIG.

The intermediate strip 10 and the area 11 designated for the production of the second joint 12 are preferably provided with an extension 13 on the upper side. This extension part 13 is designed to be wrapped around the mouth wrap part 2 to increase strength, while the cut-out part between them is in the range where the body plate 1 is doubled by the cut-out part 7. It is formed lower so as not to cause undesirable thickening of the opening part 2.

The cutting mold part 7 is preferably somewhat shorter than the cutting mold part 5 at the lower end. This is because the edge of the bottom plate is laminated on the lower edge of the cutting mold part 5, making it thicker, but if the lower edge of the cutting mold part 5 is lengthened, This is to prevent the thickness of the pot-shaped container from increasing at the side ends.

When the cut-out part 7 is lengthened on its lower side, it projects into the foot region 4 and is sealed together with the cut-out part 5 of the shell plate 1 by the pressure exerted during the formation of the shell-base plate connection. However, this is not absolutely necessary. In many cases, it is sufficient for the cut-out part 7 to simply be present in the upper region on the left side of the handle, for example to be bounded by the line shown in dashed lines in FIG. be.

During the production of the cot, first the body plate cutting die is rolled up in the usual manner and the first body plate joint 6 is closed, for example by the action of ultrasonic welding. The mandrel supporting the shell plate 1 is then rotated by the value of the angle between the joints 6 and 12, and the second shell plate joint 12 is closed. Also,
If desired, additional coupling joints 15
can be applied in a similar manner and at the same time or in a special working step between the cut-out part supporting the handle and the body plate. Thereafter, the bottom plate is fitted into the body plate 1, the edges are bent together with the latter, and the bottom plate is pressed by the body plate base foot 4.
The bonding joint 15 then occurs at the lower edge of the cutting mold part 7. Finally, the body plate 1 is formed with a mouth wrap portion 2.

The cut-out part 7, which includes the handle, is joined to the shell part by joints 6 and 12 on both sides thereof. Between these two joints, the upper elongated edge 16 and the lower elongated edge 17 are joined to the intermediate strip part 10 of the handle and extend out, and during this joining, if Depending on the case, the two elongated edges are further connected to the shell plate by welds 15 or 14.

The finished tip has the cross-sectional shape shown in FIG. Kotup is in the range of corner 18,
And it is certainly seen that the cut-out part 7 is reinforced in this angular range, preferably at least 120°, where the force is to be transmitted from the handle to the barrel plate 1 of the tip. .

In FIGS. 1 and 2 the welded joints are implied by stippling. Joint parts 12, 14, 15
does not need to be of the same quality as the joint 6 since it does not require much strength. For this reason, while ultrasonic welding is used for the joint 6,
From the viewpoint of cost, it is preferable that the former joint be welded by simple means, such as low-cost thermal welding.

[Brief explanation of the drawing]

1 and 2 are side views of the tip from different angular directions. FIG. 3 is a diagram showing the cutting type of the body plate of the copp. FIG. 4 is a sectional view of the tip. 1... Trunk plate, 2... Muzzle part, 4... Pedestal range,
5... Cutting mold part, 6... First mold part, 7...
Range, 8...Handle part, 9...Folding line, 10
... intermediate thin plate part, 11 ... range, 12 ... second joint part, 13 ... extension part, 15 ... joint joint part,
16... Upper elongated edge, 17... Lower elongated edge.

Claims (1)

[Claims] 1. The body plate 1 of the pot-shaped container is closed by an overlapping part, and this overlapping part has a thick and mechanically strong structure between the inner layer and the outer layer of the overlapping part. exhibiting a bond and comprising, in this outer layer, at least an outwardly foldable handle 9 omitted from this bond in the area forming this bond;
In a pot-shaped container made of a fibrous material such as paper, the fibrous material is covered with a heat-fusible sealing layer, and the overlapping portion is bonded to the body of the overlapping portion. A first joint 6 with strong joint strength located at the edge bordering the inner surface of the plate
and a second joint part 1 with lower joint strength, which is located at the edge of the above-mentioned overlapping part bordering on the outer surface of the shell plate.
2. A pot-shaped container with a handle, comprising: 2. A patent characterized in that the second joint part 12 and/or the intermediate thin plate part 10 of the handle 9 are provided with an extension part 13 included in the mouthpiece part 2 A pot-shaped container with a handle according to claim 1. 3. The above-mentioned connection of the overlapping portions is provided with one or more joints 14, 15 on the upper edge of the overlapping portion and/or on the lower edge of the overlapping portion. A pot-shaped container with a handle according to claim 1 or 2, characterized in that: 4. Claim 1, characterized in that the intermediate thin plate part 10 of the handle 9 is connected at its lower end to the body plate base foot part 4 within the range of pressurization of the bottom plate edge. The cup-shaped container with a handle according to any one of paragraphs 3 to 3. 5. A handle according to any one of claims 1 to 4, characterized in that the cut-out portion 7 including the handle 9 extends over at least about 120° (corner 18). A pot-shaped container. 6. The first joint 6 is welded by ultrasonic welding, and the second joint 12 or the other joints 14, 15 are welded by heat welding. A pot-shaped container with a handle according to any one of claims 1 to 5.