JPH08324603A - Can cap - Google Patents

Abstract

PURPOSE: To provide a can cap not detached from a beverage can by gas such as carbon dioxide or fermentation gas generated in the can even when the drinking port of the unfinished beverage can containing carbon dioxide or fermentation gas of Coca-Cola or beer is closed. CONSTITUTION: In a can cap wherein the cap main body 3 bonded and fitted to the outer peripheral edge 2 of the drinking port of a can l under pressure to close the drinking port is molded from a flexible resin and an opening part 6 is formed at the position coinciding with the drinking port of the can l of the upper surface of the cap main body and the lid member fitted to the opening part 6 in a freely detachable manner, a small hole 11 having a predetermined diameter communicating with the opening part 6 provided to the inside of the lid member 7 is formed to the lid member 7. A porous material 12 having air permeability is provided to the inner surface of the lid member 7 to close the small hole 11 from the inside of the lid member 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can cap which fits on the outer peripheral edge of a can of a can to close the can.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
Although various can caps have been proposed, for example, such a can cap is fitted to the outer peripheral edge of the can of a beverage containing carbon dioxide gas or fermentation gas such as drinking cola or beer to close it. If you keep it, the internally generated gas such as carbon dioxide gas and fermentation gas fills the can more than a predetermined pressure within a few minutes,
It was found that the gas pressure blows off the can cap.

The present invention finds out such a problem,
This is to provide a can cap that solves this problem.

[0004]

The gist of the present invention will be described with reference to the accompanying drawings.

A cap body 3 that is press-fitted onto the outer peripheral edge 2 of the can 1 to close the mouth is molded of a flexible resin, and the upper surface of the cap body 3 matches the mouth of the can 1. In a can cap in which an opening 6 is formed at a position where the opening 6 is formed, and a lid 7 that is detachably fitted to the opening 6, is provided, the lid 7 communicates with the opening 6 side inside the lid 7. A can cap characterized in that a small hole 11 having a diameter is formed and a porous material 12 having air permeability is attached to the inner surface of the lid body 7 to close the small hole 11 from the inside of the lid body 7. It is a thing.

Further, the opening diameter of the small hole 11 and this small hole
Material of the porous material 12 that closes 11 from the inside of the lid 7
Ventilation conditions such as thickness are prevented from causing the inside of the can 1 to be desorbed from the can 1 due to this gas pressure when the can 1 is filled with internally generated gas such as carbon dioxide gas or fermentation gas at a predetermined pressure limit or higher. The can cap according to claim 1, wherein the can cap is set so as to have a gas exhausting property and a sealing property capable of maintaining a high gas pressure close to the predetermined limit pressure.

[0007]

The cap body 3 is press-fitted onto the outer peripheral edge 2 of the can 1 to close the drinking mouth of the can 1.

Since the product of the present invention is molded from a resin having flexibility, it can be attached and detached by closely fitting. Even if there is some error in the outer diameter of the can 1, the can 1 fits closely.

Further, when the product of the present invention is fitted and clogged with the outer peripheral edge 2 of the drinking mouth side 1 of a drinking can 1 containing carbonated gas such as cola or beer or fermentation gas, it is generated in the can 1. The generated internal gas such as carbon dioxide gas or fermentation gas is filled, but the internal gas pressure does not reach a pressure higher than the limit pressure for desorbing the product of the present invention, and the inner surface of the lid 7 has air permeability. It is discharged to the outside of the can 1 through a small hole 11 formed in the lid body 7 through the quality material 12. That is, this internally generated gas pressure prevents the product of the present invention from being detached from the can 1.

Further, since the porous material 12 is attached to the inner surface of the lid body 7 to close the small hole 11 from the inside of the lid body 7, even if the can 1 is tilted or tilted, the small hole 11 can be inserted through the small hole 11. Drinking water inside does not easily spill.

In addition, various ventilation conditions such as the opening diameter of the small hole 11 and the material and thickness of the porous material 12 that closes the small hole 11 from the inside of the lid 7 are set in the can 1 with carbon dioxide gas or fermentation gas. And the like, has an exhausting property that prevents the cap body 3 from being detached from the can 1 due to this gas pressure when it is filled with a gas above a predetermined limit pressure, and is maintained at a high gas pressure close to the predetermined limit pressure. It is possible to set it so that the ventilation condition with a possible sealing property can be satisfied, and by setting it through experiments in this way, the internally generated gas in the can 1 with the mouth closed can be appropriately discharged without excessive escape. Since the gas pressure in the can 1 is maintained at a high gas pressure close to a predetermined limit pressure for detaching the cap body 3 from the can 1, it is difficult to lose the breath even after a lapse of time. (Both cola and beer) That.

[0012]

EXAMPLE In this example, a step is formed on the slant fitting portion 5 on the inner surface of the hanging collar portion 4 of the cap body 3 to form an outer peripheral edge 2 of the can 1 having a large diameter.
Large-diameter fitting peripheral edge portion 5a to be fitted to the outer peripheral edge 2 of the small-sized can 1
And a small diameter fitting peripheral edge portion 5b which is fitted to the two types of cans 1 are formed. FIG. 2 illustrates a state in which the can 1b having a small diameter is fitted.

The present invention is not limited to this embodiment, and a step may be further formed so that it can be fitted into three or four types of cans 1 having different diameters. The flexibility of the hanging collar 4 may be used to allow fitting to the outer peripheral edge 2 of the can 1 of various diameters, in which case the lower part of the inclined surface becomes the large-diameter fitting peripheral part 5a and the upper part The deviation functions as the small diameter fitting peripheral edge portion 5b.

A tubular portion having an opening 6 formed at the apex is vertically formed at a position on the upper surface of the cap main body 3 which coincides with the drinking mouth, and the opening 6 is bent by bending the lid mounting body 8 to cover the lid. Body 7
Is formed so as to be detachably attached and closely fitted.

The lid mounting body 8 of this embodiment is integrally resin-molded on the lower edge of the hanging collar portion 4 on the opening 6 side.

In this embodiment, a small hole 11 communicating with the opening 6 side inside the lid 7 is formed in the center of the upper surface of the lid 7.
A porous material 12 having air permeability is attached to the inner surface of the lid 7 to close the small hole 11 from the inside of the lid 7.

The small hole 11 is set and formed so that the opening diameter on the upper surface side of the lid 7 has a diameter of about 0.5 mm. As shown in FIG. 3, the small hole 11 is illustrated as being formed so as to have a larger diameter toward the inner surface side of the lid body 7. However, the small hole 11 is formed so as to project on the resin molding die. If the pin for forming the small hole 11 is a straight rod-shaped pin, the pin is easily damaged by repeated molding, and the diameter becomes larger toward the protruding base side where the small hole 11 can be formed as in this embodiment. This is because, when the pin is protrudingly provided, the durability of the pin is improved and the pin is less likely to be damaged, and the molding die can endure many molding times.

As the porous material 12, a foamed polyethylene sheet having a thickness of about 1 mm is adopted. This foamed polyethylene sheet is a foam having a closed cell structure obtained by extruding foamed polyethylene beads into a continuous sheet and expanding it 1.5 to 3.0 times, and has gas permeability and low moisture permeability. It has features such as. That is, this polyethylene sheet allows the internally generated gas in the can 1 to be appropriately ventilated and discharged, and even if the can 1 is tilted or tilted, it is difficult for the drinking water to soak into the polyethylene sheet, and the beverage in the can 1 from the small hole 11 is prevented. The structure prevents water from spilling.

The opening diameter of the small holes 11 and the material and thickness of the porous material 12 are such that the inside of the can 1 is filled with an internally generated gas such as carbon dioxide gas or fermentation gas at a predetermined limit pressure or more so that the cap body 3 is After performing an experiment so as to satisfy the ventilation condition, which has the exhaust property of preventing the gas from being detached from the can 1 by this gas pressure and has the airtightness capable of maintaining the high gas pressure close to the predetermined limit pressure. The optimum opening diameter of the obtained small holes 11 and the porous material 12
It is set to the material and thickness of.

Therefore, by simply forming a small hole in the lid to prevent the cap body from being detached and attached due to the internally generated gas pressure in the can, various ventilation conditions as described above can be realized. It is not possible to do so, and the gas generated inside the can will escape too much, and if the can is tilted or tilted, the drinking water in the can will easily spill out from this small hole, but it will be insufficient for practical use. In the embodiment, since the porous material 12 is attached to the inner surface of the lid body 7 in which the small holes 11 are formed and the internally generated gas in the can 1 is discharged from the small holes 11 through the porous material 12, The generated gas in the can 1 does not escape too much, and even if the can 1 is tilted or tilted, drinking water slightly exudes from this small hole 11 and it does not easily spill out. Can be realized.

In the figure, reference numeral 9 is a tongue piece for removing the cap body 3, 9a is a hole in which, for example, a key holder type pull tab raising tool or the like can be attached, 10 is a tongue piece for removing the lid 7, and 13 is a porous material. It is a locking projection for locking 12.

[0022]

Since the present invention is constructed as described above,
For example, when the product of the present invention is closed by fitting the product of the present invention to the outer peripheral edge of the drinking side of a beverage can containing carbon dioxide or fermentation gas such as cola or beer, carbon dioxide or fermentation gas generated in the can Although the internally generated gas fills up, the internal gas pressure does not reach a pressure higher than the limit pressure for desorption of the product of the present invention, and the inner surface of the lid is formed on the lid through a porous material having air permeability. Since it is discharged to the outside of the can through the small holes, the product pressure of the present invention prevents the product of the present invention from being detached from the can, and moreover, the porous material is attached to the inner surface of the lid, Since the small hole is blocked from the inside, it becomes a can cap that exhibits excellent practical effects, such as drinking water in the can does not easily spill from the small hole even if the can is tilted or tilted. .

In addition, various ventilation conditions such as the opening diameter of the small hole and the material and thickness of the porous material that closes the small hole from the inside of the lid are defined by the internally generated gas such as carbon dioxide gas or fermentation gas inside the can. Is exhausted to prevent the cap body from being desorbed from the can due to this gas pressure when the pressure exceeds a predetermined limit pressure, and has a hermeticity that can maintain a high gas pressure close to the predetermined limit pressure. It is possible to set it so that the conditions are met. By setting it through experiments in this way, the internally generated gas in the can with the drinking mouth blocked can be appropriately discharged without excessive escape, and the gas pressure in the can can be reduced. Since the cap body is maintained at a high gas pressure close to the predetermined limit pressure for detaching from the can,
It becomes an excellent can cap that will not let you lose consciousness over time and allows you to drink the drinking water in the can (whether it is cola or beer) deliciously.

[Brief description of drawings]

FIG. 1 is a perspective view of the present embodiment.

FIG. 2 is a cross-sectional view showing a usage state in which the small diameter can of this embodiment is fitted.

FIG. 3 is an enlarged explanatory sectional view of a main part of the present embodiment.

[Explanation of symbols]

 1 can 2 outer peripheral edge 3 cap body 6 opening 7 lid 11 small hole 12 porous material

Claims (2)

[Claims] 1. A cap body that is press-fitted to the outer peripheral edge of a can of the can to close the mouth, is formed of a flexible resin, and is placed at a position on the upper surface of the cap body that matches the mouth of the can. In a can cap in which an opening is formed and a lid that is removably fitted in the opening is provided, a small hole having a predetermined diameter that communicates with the opening inside the lid is formed in the lid. A can cap characterized in that a porous material having air permeability is attached to the inner surface of the lid, and the small hole is closed from the inside of the lid. 2. Ventilation conditions such as the opening diameter of the small holes and the material and thickness of the porous material that closes the small holes from the inside of the lid, the inside of the can such as carbon dioxide gas or fermentation gas The cap body has an exhaust property to prevent the cap body from being detached from the can due to this gas pressure when the generated gas is filled to a pressure higher than a predetermined limit pressure, and has a sealing property capable of maintaining a high gas pressure close to the predetermined limit pressure. The can cap according to claim 1, wherein the can cap is set so as to satisfy the ventilation condition.