JPH08156961A - Lid for wide mouth container - Google Patents

Abstract

PURPOSE: To make a visual check from outside whether container is securely sealed or not by utilizing changes in its inner pressure by a method wherein a seal lid is provided with a pressure confirming part which projects to either lower in pressure of the inside or outside of the seal lid by the difference between the inner pressure and the outer pressure and an outer lid is provided with a pressure visual recognizing part for visually recognizing the pressure confirming part from outside. CONSTITUTION: A lid 1 is mechanically attached to a container 20 from above with the pressure confirming part 17 of the lid projecting upwardly. A projection 14 and a lip 21 are firmly engaged and securely held together. A seal part 16 is urged against the mouth part of the container to seal its contents. When the temperature of the contents falls, the inner pressure becomes smaller than the outer pressure and a pressure confirming part 17 is displaced inwardly. If the sealability is impaired, since the inner pressure and the outer pressure are almost the same, the pressure confirming part 17 remains projected to outside. Therefore, it can be confirmed whether or not the sealability is perfect by seeing the state of the pressure confirming part 17 through a hole 5, i.e. the pressure visual recognizing part. Moreover, the lid is simple in structure and inexpensive and easy to produce.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for use as a cup-shaped container for beverages such as sake, so-called one-cup container, and is a wide-mouth container for so-called hot-packing for packaging the contents in a warm state. It is about the lid of.

[0002]

2. Description of the Related Art In a conventional wide-mouthed container of this type, a thin plate-shaped aluminum lid is fitted to a lip of the container mouth, and a knob is provided on an edge of the lid. Pull the knob,
A so-called rimple cap has been used, which destroys the peripheral portion of the lid and releases the fitting with the lip of the container mouth.
An example of the rimpple cap is shown in Japanese Utility Model Laid-Open No. 5-71118.

[0003]

In a conventional lid for performing hot pack represented by a so-called limp cap, the temperature of the contents is lowered after the packaging is completed and the internal pressure is changed, which may impair the sealing. Could not be seen from the outside. The present invention relates to a lid for a wide-mouthed container that allows a user to visually check whether or not sealing is reliably performed from the outside by utilizing a change in internal pressure.

[0004]

SUMMARY OF THE INVENTION According to the present invention, on the back surface of a top plate of a short tubular resin outer lid that fits into a lip of a wide-mouthed container mouth, a thin plate-shaped metal or resin-made contents are provided. A seal lid for sealing is provided integrally, and the seal lid is provided with a pressure confirmation portion that projects and displaces toward the lower inner or outer pressure due to the difference between the internal pressure and the external pressure, and the pressure confirmation portion is visually recognized from the outside on the outer lid. A lid for a wide-mouthed container, which is provided with a pressure visually recognizable portion.

[0005]

The present invention comprises the outer lid and the seal lid as described above, and the outer lid is fitted to the mouth portion of the wide-mouthed container and firmly fixed to the container, and the seal lid is integrated with the outer lid. This has the effect of sealing the contents of the container. Also, because the seal lid is equipped with a pressure confirmation part that projects and displaces to the lower inner or outer pressure side due to the difference between the internal pressure and the external pressure, when hot packing, the lid should be placed with the pressure confirmation part displaced outward. Put on. After the packaging is completed, the temperature of the contents decreases, the internal pressure becomes smaller than the external pressure, and the pressure confirmation part is displaced inward. If the hermeticity is impaired, the internal pressure and the external pressure become almost equal, and the pressure confirmation part remains displaced outward. If this is confirmed from the pressure visually recognizing part of the outer lid, it is possible to visually confirm at a glance whether or not the sealing property is perfect.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing the embodiments. FIG. 1 is a schematic cross-sectional view of a state where the lid 1 of the wide-mouthed container of the embodiment is attached to the container. In the figure, the left half and the lower side of the container are omitted. Figure 2 shows the outer lid 2
FIG. 3 is a side view of the outer lid 2.

The lid 1 is attached to a glass cup-shaped wide-mouthed packaging container, and comprises a resin-made outer lid 2 in the form of a short cylinder and an aluminum seal lid 3. As shown in FIG. 2, the top plate 4 of the outer lid 2 has a knob portion 7 formed by a central hole 5 and a notch 6 around the hole 5, and the knob portion 7 cuts a fragile bridge 8. It can be easily triggered. The hole 5 is also a pressure visual confirmation portion for visually confirming the pressure confirmation portion 17 from the outside. As shown in FIG. 3, the notch 6 reaches the cylindrical wall 9, and the tip of the notch 6 continues to the cutting line 11 having the V-shaped groove 10 on the inner surface. Its lower end is a notch 12 for easier cutting. A section between the two cutting lines is a cutting section 13 that is connected from the knob section 7 and is separated from the outer lid 2 together with the knob section 7. It is needless to say that the cutting line 6 can be formed on the top plate 4 by making the cut 6 shorter and making the cutting line 11 longer than that in the present embodiment. As shown in FIG. 1, a protrusion 14 that bulges inward is formed at the lower end of the cylindrical wall of the outer lid 2 and fits with the lip 21 of the wide-mouthed container 20. Further, a recess 15 corresponding to the shape of the bottom of the wide-mouthed container 20 is formed on the upper surface of the top plate 4 of the outer lid 2 so that they can be stacked.

The seal lid 3 has a substantially disc shape, and as shown in FIG. 1, a seal portion 16 is annularly formed as a compound (lining) on a portion of the back surface which comes into contact with the bottle mouth portion, and the outer lid is provided. The back surface of the second top plate 4 and the upper side of the protrusion 14 are mechanically fitted and integrated. In order to integrate the outer lid and the seal lid, in addition to mechanically fitting, various known methods such as attaching a preformed seal lid to a mold of the outer lid and molding the outer lid in this state. Can be used.
The central portion of the seal lid 3 serves as a pressure confirmation portion 17 that protrudes upward or downward in a dish shape.

The lid 1, as shown in FIG.
The container 7 is mechanically mounted from above with the container 7 protruding upward. The ridge 14 and the lip 21 are firmly fitted and fixed firmly. The seal portion 16 is pressed against the mouth portion of the container to seal the contents. When the temperature of the contents drops, the internal pressure becomes smaller than the external pressure, and the pressure confirmation unit 17 is displaced inward as shown by the broken line in FIG. When the hermeticity is impaired, the internal pressure and the external pressure are substantially equal to each other, so that the pressure confirmation portion 17 remains protruding outward. Therefore, from the hole which is the pressure visual confirmation portion, the pressure confirmation portion 1
It is possible to confirm whether the sealing property is perfect by looking at the state of No. 7.

When the user opens the lid, the knob 7 is raised and further pulled to separate the knob 7 and the cutting portion 13 connected to the knob 7 from the outer lid 2. As a result, the cylindrical wall of the outer lid is opened, the fitting between the lip 21 and the protrusion 14 can be easily released, and the lid 1 can be removed from the container 20.
Since the aluminum seal lid 3 is not cut and is integrally formed inside the outer lid, there is no danger of injuring a person.

FIG. 4 is a plan view of a lid 30 of another embodiment. A hole 34 and a cut 3 are formed in the top plate 32 of the outer lid 31 of the lid 30.
A knob portion 33 is formed by 5. The hole 34 is also a pressure visual confirmation portion for visually recognizing the pressure confirmation portion from the outside. As described above, the knob portion and the pressure confirmation portion can be provided not only in the vicinity of the center of the lid but also in various positions with various sizes and various shapes.

FIG. 5 is a schematic sectional view of a lid 40 of another embodiment mounted on a container. In this embodiment, the seal lid is made of resin. The seal lid 41 of the lid 40 is made of a substantially disc-shaped resin, and a seal portion 42 is annularly provided as a compound (lining) on a portion of the back surface thereof that comes into contact with the bottle mouth portion. The central portion of the seal lid 41 is thinner than the surroundings, and serves as a pressure confirmation portion 43 that protrudes like a dish toward the side where the pressure on the upper side or the lower side is smaller.

[0013]

EFFECTS OF THE INVENTION The lid of the wide-mouthed container of the present invention makes it possible to visually recognize from the outside whether or not the sealing is reliably performed by utilizing the change in the internal pressure. Further, the structure is simple, and the manufacturing cost is low.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a state in which a lid 1 of a wide-mouthed container of an embodiment is attached to a container.

FIG. 2 is a top view of an outer lid 2.

FIG. 3 is a side view of an outer lid 2.

FIG. 4 is a plan view of the lid 30 according to the embodiment.

FIG. 5 is a schematic cross-sectional view of a state where the lid 40 of the embodiment is attached to a container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 lid 2 outer lid 3 seal lid 4 top plate 5 hole 6 notch 7 knob part 8 bridge 9 cylinder wall 10 V-shaped groove 11 cutting line 12 notch 13 cutting part 14 protrusion 15 dent 16 seal part 17 pressure confirmation part 20 Wide-mouthed container 21 Lip 30 Lid 31 Outer lid 32 Top plate 33 Knob portion 34 Hole 35 Notch 40 Lid 41 Seal lid 42 Seal portion 43 Pressure confirmation portion

Claims (4)

[Claims] 1. A seal lid, which is made of thin metal or resin and integrally seals the contents, is integrally formed on the back surface of a top plate of a short tubular resin outer lid fitted to the lip of the mouth of the wide-mouthed container. The seal lid is provided with a pressure confirmation portion that projects and displaces toward the lower inner or outer pressure due to the difference between the internal pressure and the external pressure, and the outer lid is provided with a pressure visual confirmation portion that allows the pressure confirmation portion to be visually recognized from the outside. Wide-mouthed container lid characterized by 2. The outer lid is provided with a knob portion and a cutting portion which is continuous from the knob portion and which can be separated from the cylinder wall by a break line, and the knob portion is pulled to open the cutting portion. The lid of the wide-mouthed container according to claim 1, which is a lid. 3. The seal lid is made of thin disk-shaped aluminum, the pressure confirmation portion is made to project in a dish shape above or below the seal lid, and the pressure visual confirmation portion is a central hole of the knob portion. A lid for a wide-mouthed container according to claim 2. 4. The seal lid is made of a thin disk-shaped resin, the pressure confirmation portion is made to protrude in a dish shape above or below the seal lid, and the pressure visual confirmation portion is a central hole of the knob portion. A lid for a wide-mouthed container according to claim 2.