JPS621899B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a lid that is easy to open, and in particular,
This invention relates to improvements in pressure relief lids of the type currently used in can lids having push-fit lids.

It is generally accepted in the can making industry that cans with push-on lids require some type of pressure relief lid for highly carbonated beverages, and that this The pressure within is at least reduced before opening the spout lid.
An example of a pressure relief lid is shown in FIG. 1 of the accompanying drawings, where it will be seen that the pressure relief lid V is smaller in area than the spout lid P.

Cans containing highly concentrated carbonated beverages, including cans with pressure relief lids as shown in Figure 1,
When opened, there is a possibility of squirting or squirting, especially if the beverage in the can is frothy. This problem is exacerbated if the can is tipped during the opening operation. That is, this means that the liquid in the can will come close to or cover the pressure relief lid, and the gas released thereby will very likely be accompanied by some liquid or bubbles in the can. Because it does. The problem is exacerbated if the can is roughly handled before opening. That is, by shaking the can, carbon dioxide is released into the head space of the can;
This is because bubbles are generated.

U.S. Patent No. 2,261,117 by J.J.
discloses a push-fit lid having a single lid member. The lid member is formed by forming a bulge in the container component, cutting around the bulge to form a cut bulge tab, and then flattening the bulge to form a cut edge. It is formed by bringing the opening into an overlapping relationship with an edge portion surrounding the opening.

U.S. Pat. No. 3,334,775 to Klein et al. discloses a can lid with a gate that can be pushed down into the container by finger pressure. Although the container has a single gate, the patentee claims that in paragraph 4, lines 62-66, a portion of the gate plate is folded inward from each end to form a specific gate. It is stated that the gate plate portion forming the spout and air vent and between these spout portions remains in place. Klein et al. do not disclose or present a resealable pressure relief member.

U.S. Pat. No. 3,741,432 to Wirth et al., and Australian Pat. No. 4,759,51 each disclose a lid tab for a container having a pressure relief tab therein.
Hand force applied to the pressure relief tab is transferred to the lid tab. Both the pressure relief tab and the lid tab can be depressed by the force of the user's thumb, the finger force being applied to the pressure relief tab and then transferred to the lid tab in a single action. , which first opens the pressure relief port and then the lid tab or lid opening. Worth et al.
There is no suggestion that the disclosed pressure relief tab is resealable when the finger pressure is removed. As a practical matter, the power of the Wirth et al. patent lies in its ability to release pressure and open the spout in a single operation without having to withdraw the finger from the tab area.

U.S. Patent No. 3759206 (Re28910) and No.
No. 3,931,909 discloses a push-in easy-open lid for containers such as metal beverage cans.
The patent discloses opening by bulging an area of a can lid or other container component, cutting a tab from the container component, and positioning at least a portion of the bulge outside and around the tab. Discloses easy lid formation. After cutting and shearing, the bulge surrounding the opening is flattened and the metal is brought into overlapping relationship with the cut edges of the tab.

U.S. Pat. No. 3,958,717 to Ellis discloses a push-in easy-open lid having a spout tab and a pressure relief tab. The tabs are integrally connected to the can lid by a hinge region and have a common hinge region, and the tabs extend in opposite directions from the common hinge region. The patent owner is:
This construction results in a similar appearance to traditional ring-pull can lids, thus requiring no special manual for consumer education, and with the tabs being very close to each other. It is disclosed that the can can be opened with a minimum of finger movements because of its position. However, there is no suggestion that the pressure relief tab itself will reseal upon removal of finger pressure.

U.S. Pat. No. 4,033,275 to Radtke discloses a beverage can having a pressure relief tab and a spout tab generally similar to the design of U.S. Pat. No. 3,958,717, where the tabs do not have a common hinge area. , but they differ in that they are placed apart from each other.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an improved pressure relief lid that is capable of at least alleviating or better controlling the above-mentioned blowout or gushing problems.

The present invention provides a push-on pressure relief lid for a container component that is integrally formed with a portion of the container component, defined by at least one weakened line, and that is defined by a push-in force. a lid member which can be opened by pressing the lid member, the lid member having an operating portion adapted to receive a pushing force applied thereto in use; a connecting portion to the container component around which the lid member makes a bending movement; the lid member, the connecting portion, and a portion of the container component surrounding the lid member; , cooperate to substantially prevent permanent opening of the lid member due to a pushing force applied by a finger, thereby causing the lid member to return to its closed position when the pushing force applied by the finger is removed. To provide a push-type pressure release lid that is characterized by returning approximately to .

From the foregoing, it can be seen that since the lid member does not remain open unless a pushing force is applied to the operating part, the blowing or squirting will not continue even if this force is removed. Probably. Furthermore, since the pushing force must be applied to hold the lid member open, the finger or thumb applying the force will act to deflect any liquid or gas that comes out of the lid. Probably.

In the case of the prior art, as shown in Figure 1, the person opening the lid tends to remove his/her finger from the lid before the eruption occurs; The liquid that flows becomes like a fountain.

The improved pressure relief lid can be made in several ways. For example, the degree of elevation of the operating portion and/or the effective area of the pressure relief lid member suitable for biasing may be such that deformation due to finger force does not exceed an angle exceeding the elastic limit of the metal at the connection. This prevents the lid member from being permanently opened by finger or thumb force. Alternatively, the coupling part may be located at a remote location with respect to the operating part compared to prior art devices, in which case the hinge part is at right angles to the outer circumference of the operating part. Also, the lid cannot be opened far enough to deform beyond the elastic limits of the metal defining the connection.

In one particularly preferred form of the invention,
A pressure relief lid is formed at the narrow end of a generally pear-shaped spout lid that is hinged to the can lid around its wide end, and the pressure relief lid is formed at a narrow connecting portion. is partially disconnected from the spout lid except at the joint, around which the pressure relief lid flexes during the opening operation, and the pressure relief lid is preferably permanently removed by finger or thumb force. raised to such an extent as to prevent severe opening, or of such effective dimensions.

In the case of the device shown in FIG. 1, a finger or thumb may cover the opening created by opening the pressure relief lid. This has been found to result in an opening characteristic that is undesirable by the user. That is, users tend to remove their thumbs or fingers as soon as they feel the gas being released. In the preferred device described above, the release of gas occurs simultaneously with the opening of the lid, while upon ejection the liquid cannot escape by removing the force applied to the lid member, and the gas and/or bubbles are removed. By instantaneous release, the ejection can be controlled.

In accordance with another preferred form of the invention, the pressure relief lid member is formed as an extension on the spout lid, and the aperture is preferably formed between each lid interconnected to form a single opening. Closed by. In this device, the pressure relief lid operates as described above, but is removed from its opening when the spout lid is opened;
This provides an outlet through which the contents of the can can be poured out during a pouring operation.

Regarding other preferred embodiments of the invention:
The operating portion is located at one end of a relatively narrow elongated portion extending from the connecting portion toward the container component.
In this device, the finger or thumb applying the opening force does not completely cover the entire lid, thus leaving an escape route for the gas released from the container.

For all embodiments of the invention, it is important that the lid is associated with the opening to such an extent that the lid is not pressed down into the opening, but exceeds its elastic limit. be. The lid is pressed down into a beverage can or other container when a finger pressure is applied, causing the lid to flex around the joint without exceeding the elastic limit of the joint. The lid returns to at least approximately its original position, thereby resealing the container against any further attempts by foam or liquid to escape from the can.

The exact amount of depression that a given lid can experience without exceeding the elastic limits of the joint depends on a number of variables, such as lid dimensions, metal thickness, metal type, It depends on the effective length of the connection and the like. It is generally not possible to determine the exact amount of lid deformation that can be experienced before the elastic limit of the connection is exceeded. However, in general terms, as a result of devising the following simulated test, the amount of angular depression of the lid may be easily determined.

The lid was formed from a 0.015 inch (0.38 mm) thick sheet of 5082 aluminum. The lid was designed as shown in Figure 6, with the center cut located 0.016 inches (0.41 mm) from the inside of the lid. The farthest end of the lid away from the joint is pushed into the simulated can by 0.030 inches (0.76 mm), which corresponds to an angular deformation of 5.5 degrees, and when this deformation force is removed, the The lid returned to almost its original position. Deformation of 0.035 inches (0.90 mm) still resulted in the lid returning to approximately its original position, ie, the elastic limit of the connection was not exceeded. However, deforming the lid by 0.040 inches (1.02 mm), or 75 degrees correspondingly, causes permanent deformation of the joint and the lid no longer returns to its original position. .

This simulated test was performed by tightening the lid at the hinge line and applying force to the free edge of the lid furthest from the hinge line.

Based on the results of this test, the angular displacement of the lid should be less than 7.5 degrees, preferably
It can be seen that the temperature should not exceed 5.5 degrees or 6.0 degrees. Of course, this amount of displacement is sufficient to release the pressure inside the can, and the minimum amount of displacement to obtain such a result is also a large number of changes,
For example, it will depend on the thickness and type of sealant applied to the cutting line.

Actual use by consumers with widely varying can opening habits may often result in slight but permanent deformation of the joint or hinge; however, this deformation is normal. (i.e. the consumer would probably open it with too much force) and the internal pressure within the can should minimize it, especially in the case of carbonated or malt drinks. I can say that.

In order that the invention may be more easily understood, some preferred embodiments will now be described with reference to the accompanying drawings.

Referring to FIG. 1 of the accompanying drawings, the prior art can lid shown in FIG.
It has a lid V and a spout lid P. Each lid is circular and integrally hinged at H to the can lid at its outer periphery. Therefore, when the lids V and P are opened,
They hinge around H, and this opening force deflects the lid to an angle that exceeds the elastic limit of the metal hinge H, so that the lid is held in its open position. There will be. Lid V
, the tab is located higher than the spout tab so that it can be pushed open to such an extent as to allow adequate venting of the can while pouring. There is.

In the simple or schematic embodiment of the invention shown in FIG. 2, the air vent lid V is replaced by a pressure relief lid 10. The lid 10 has a lid member or tab 11 with an operating portion 12.
The operating part is in the form of an upwardly raised button, whereby the opening force is applied to the lid 10 by one finger or thumb.
The tab 11 has a relatively elongated shape compared to the air vent lid V, and is integrally attached to the can lid at 13. When the coupling part 13 is used,
It does not act as a hinge in the same way as hinge H in FIG. 1, and for this reason the joint will therefore be described as a link rather than as a hinge. The lid member 11 is disclosed in U.S. Patent No.
fully sheared structure as described in Re. 28910 (3759206) and No. 3931909, the disclosures of which are incorporated herein by reference.
The member may be formed by the methods described therein, or by enlarging the tab by coining or otherwise, and/or shrinking the opening size by a suitable cold working operation such as coining.

During can opening, force is applied to the raised area 12 by one finger or thumb. Joint part 1
3 is separate from said portion 12, so it is impossible for the entire lid to be blocked by fingers, and the gas vent holes are opened at least along the long side of the tab 11. Dew. Furthermore, the fact that the coupling portions 13 are located apart means that the tabs 1
1 can be deflected by the force applied by the finger is not so great as to exceed the elastic limit of the metal in the joint 13, so that the tabs are free from the opening force when the opening force is removed. It will return to approximately its closed position. This will of course be assisted by any pressure within the can or contents being released. When these two factors are combined, even if an eruption event occurs, the ejection can be controlled by the lid 10 once the can opening force is stopped and the gas and/or bubbles are released instantly. can do.

In actual embodiments, the lid 10 may also be located near the center of the can lid, reducing the likelihood that liquid present in the gas will spill out of the can. Furthermore, in any commercially available example,
Lid 10 and P represent a sealant (not shown), such as a plastic sol, applied to the can lid in any suitable manner.
You will notice that it is sealed by.

Although the embodiments described above have the potential to at least reduce the problems associated with the prior art, the device does not allow the lid 10 to be removed once the push-opening force is removed.
has one practical disadvantage in that it no longer serves to admit air into the can during pouring and drinking. However, this problem can be solved by adopting any one of the lid shapes shown in Figures 3 to 14 of the accompanying drawings.

The can lid shown in FIGS. 3 and 4 is formed with a sheared lid member surrounding a generally pear-shaped opening 21, which member attaches to the can lid at 22. Hinged. The tab 20 is formed with a raised portion 23 extending from the wide end of the tab 20 and a smaller raised portion or button portion 24 proximate the narrow end of the tab 20. The narrow end of the tab 20 is partially cut away from the remainder of the tab 20 along lines 25 and 26, leaving a narrow joining portion 27, thereby defining a pressure relief tab 28. ing. The button portion 24 on the tab 28 is raised above the raised portion 23 so that the finger or thumb can more easily access it. For example, the tab 28 may be raised about 1 mm higher than the outer circumference of the tab 20, and it can be seen from the drawing that the tab 20 is at the same height level as the raised outer circumference of the opening 21. Dew.

The cutting lines 25, 26 allow the pressure relief tab 28 to flex around the joint 27, while the height of the tab 28 is limited by the opening applied by one finger or thumb. It is selected to prevent permanent deflection even after the force is removed. When the opening force is removed, the tabs 28 will attempt to close and prevent continued ejection, if ejection is occurring. Once the pressure inside the can is released, the lid 20 can be easily opened by simply applying finger pressure to the raised portion 23 of the opening 21. In the original embodiment, a sealant (not shown) is applied to cover all cut lines in the lid.

In order to protect the tabs 20, 28 from accidental opening and to strengthen the can lid against outward buckling due to pressure, the lid is placed within a recessed portion 29 formed in the can lid. It is desirable to form. The recessed portion 29 may be formed by making the can lid hemispherical by a small amount, for example about 1.5 mm, and then flattening the hemispherical portion.
Alternatively, the recessed portion 29 may be formed in a flat end plate. According to this method, the tabs 20, 28
is protected by the upright portion 30 of the can lid, and the end plate is also reinforced against outward buckling.

In view of the foregoing considerations, the embodiment of FIG. 3 effectively combines the separate pressure relief tab and spout tab of FIG.
It will be seen that it defines the joint between the can lid and the can lid. By practically coupling the pressure relief port and tab with the spout and spout tab, when the tab 20 is opened, the air vent opening is also opened, which is caused by the release characteristics of the pressure relief tab 28. problem is resolved. however,
Until the tab 20 is opened, the pressure relief tab functions in the same manner as described above, so that the problems associated with the prior art are reduced to at least the same extent as in the first embodiment.

The shape of the opening 21 is a result of making it suitable for pouring and drinking characteristics.

The lid is formed by a method modified from that described in the aforementioned patent. tab 20
and cut the cut 2 in a separate die processing station.
5,26 is impractical under high speed edge forming conditions.

Accordingly, in another aspect of the invention, there is provided a method of forming a lid tab having a cut line extending generally across the cut line of the tab itself, which With a stepped punch slidably positioned within the main die member and a spring biased die member,
The spring biased die member is forced into the main die member when the main cutting operation is performed. In use, the stepped punch first cuts the sheet metal material along the transverse line, partially cutting the proximal portion of the tab. A slidable die member is then pushed into the die where the remaining portion of the die is cut.

Apparatus suitable for forming the lid is shown schematically in FIG. 5, which is a fragmentary schematic cross-sectional view of the die components. The die has a main die member 40 having a cut surface 41 in the form of an aperture 21, and is slidably mounted within the main die member 40 and urged toward the position shown by a spring 43. It has a die member 42. The slide member 42 is formed with two cutting surfaces 44 for forming the cutting lines 25, 26, only one of which is shown. A stepped punch 45 having a cutting surface 46 corresponding to the cutting surface 44 first engages the sliding member 42 to cut along lines 25, 26 and around the pressure relief tab 28. disconnect. The punch 45
forces the sliding member 42 into the die 40 where the punch 45 cuts the remaining portion of the tab 20 from the can lid.

By cutting along lines 25 and 26, the replaced sheet metal is brought back flush with the remaining metal, leaving the outer periphery of the tab substantially flat. If desired, the metal on either side of each cut line may be coined to prevent the slits from opening.

If desired, the edges of tab 20 and/or the perimeter of aperture 21 may be coined or otherwise worked to increase the overlap between tab 20 and the surrounding metal.

A modification of the lid of FIGS. 3 and 4 is shown in FIG. In this modified example, cutting line 2
5, 26 are replaced by a center cut line 25', leaving two spaced connections 27' between the pressure relief tab 28' and the main tab 20'. Otherwise the lid is the same as the embodiment of FIGS. 3 and 4 and operates in exactly the same way. however,
This has the advantage of having an uncut periphery and being more resistant to leakage than the embodiment of FIG. 3, where leakage might occur if the cutting lines 25, 26 were displaced. ing. Furthermore, the uncut outer periphery of the lid of FIG. 6 results in less die processing complexity in lid fabrication. In this example, the center cut line may be formed by a so-called "offset shear" die process.

The can lid shown in FIGS. 7 and 8 includes a fully sheared lid that is hinged to the can lid at 32 and located below the pour spout 33 or tab 31 and secured to the pouring tab by a monolithic neck 35;
and a pressure relief air bleed member or tab 34 extending radially therefrom and located below the air bleed opening 36 which opens into the spout 33 through the neck 35. The tabs 31 and 34 are raised upward, and the tab 34
has a higher ridge for easier access to the fingers or thumb. For example, the tab 34 is raised about 1 mm above the outer circumference of the tab, and it will be seen from the drawing that the tab 31 is at the same height level as the raised outer circumference of the spout 33. .

The lid described above is formed in the same manner as lid 10. If necessary, the edges of each tab 31, 34 and/or the outer periphery of each aperture 33, 36 may be coined or otherwise processed to increase the overlap between the tab and the surrounding metal. You may do so.

The embodiment of FIGS. 7 and 8 essentially combines the discrete pressure relief tab of FIG. 7 with the known pouring tab, wherein the tab 31 has a pressure relief tab 34 and a can lid. Define the connection with. In use, push up the pouring tab 31 to open the air vent 3.
6 is opened, thereby solving the problem caused by the pressure relief characteristics of the pressure relief tab 34. However, until the pouring tab 31 is depressed, the pressure relief tab acts in the same manner as described above, thus reducing the problems associated with the prior art to at least the same extent as the first embodiment.

In order to protect the tab 34 from accidental opening and to strengthen the can lid against outward buckling due to pressure, the can lid may have a shape such as that shown in FIGS. 7 and 8, for example. A raised rib R is formed. The shape of the ribs and their positioning as shown in the drawings is not essential to the invention and it is therefore possible to use one or more ribs or a number of beads as may be effective for the purpose described. Other shapes and locations are possible. It will also be appreciated that similar protective rib(s) may be incorporated into the device shown in FIG. 2 of the accompanying drawings.

The position of hinge portion 32 as shown in FIG. 7 is also not essential or necessarily the most preferred. The hinge may be located in the position shown in FIG. 3, or in a position completely opposite to that shown in FIG.

Similarly, the particular shape of the combined apertures 33, 36 is not essential to the invention. The smoothly rounded nature of the opening across the neck 35 is desirable for aesthetic and specific reasons, and it is believed that the illustrated shape will exhibit good drinking and pouring characteristics.

The can lid shown in FIGS. 9 and 10 has a sheared lid member or tab 50 that overlaps and is located below the metal surrounding a generally pear-shaped opening 51. It is also hinged to the can lid at 52. The tab 50 has a central region 53 that is raised about the outer circumference of the tab. However, the raised area 53 is generally at the same height level as the sheet metal defining the hinge portion 52, and as a result, the metal of the hinge portion is almost completely removed during the lid forming process as will be described in detail later. You will notice that it is not transformed. Tests conducted to date have shown that the non-deformable nature of the metal in the hinge portion 52 makes it difficult to build up enough pressure in this general area of the can lid to cause the lid to peak or buckle. It suggests that it is possible.

The tab 50 has a pressure relief lid member or tab 55 formed therein as shown in FIGS. 9 and 10. The tab 55
is formed with an upwardly raised button 56 at the end of a relatively elongated narrow region of metal defining the tab. The tab is hinged at 57 to the sheet metal defining the tab 50, overlapping and underlying the sheet metal surrounding the sheared opening 58. Both lids are sealed by a sealant (not shown) and the pressure relief lid operates in the same manner as the pressure relief lid described in the original application to which it is referenced. However, in most can opening operations, the two lids cannot be opened by a single unidirectional push force applied to the general area of the raised button 56 on the pressure relief tab 55. You'll understand very well. Of course, in cases such as those described above, it may be necessary to energize the pressure relief lid several times. However, it is not necessary for the user to replace his fingers for the final can opening operation, such as fully opening the tab 50. If desired, tab 55 may be positioned in an opposite position adjacent the narrow end of tab 50 to ensure that no finger displacement is required while opening tab 50.

The 11th embodiment is a further modification of the embodiment shown in FIG.
As shown in the figure. In this lid tab device, the pouring tab 50' is oblate and is located opposite the hinge portion 52' located near the center of the can lid. The pressure relief tab 55' is located within a recessed area 54' within the tab 50' to protect the tab 55', but is otherwise substantially identical to the tab 55.

This arrangement of tabs 50' and 55' has the advantage that tab 55' is positioned closer to the center of the can lid and is likely to have more head space. The can lid is formed with a recessed portion 61' surrounding the lid 50'. This serves as a recess for the sealant when it is applied to the lid 50', and also to prevent the movement of metal atoms when the sheet metal around the opening 51' is coined to create an overlapping part. The sheet metal can be tightened.

The above-described embodiment of the present invention is structurally similar to the lid described in U.S. Pat. The exception is that it is formed. The lid shown in FIGS. 9 and 10 offers advantages over the Wirth et al. lid described above, just as the previously described embodiment has advantages over the prior art shown in FIG. have. Furthermore, using a common hinge area as shown in FIGS. 1 and 3 of the Wirth et al. patent would further recess the spout tab 15, which would further recess the spout tab 15. This has the disadvantage of increasing the possibility that the hinge will crack and the tab 21 will separate from the can lid.

It will be seen from FIGS. 9 and 10 that the can lid incorporating the improved lid has an outwardly hemispherical can lid plate 60. Although it is not very clear from the drawing, the hemispherical portion is slightly flattened at the top for reasons explained below. The lids 50 and 55 are formed within a downwardly recessed region 61 which is generally of the same shape as the tab 50 and extends from the hinge portion 52 towards the hemispherical end. The fact that the lids 50 and 55 are located within the recessed area 61 protects the lid 50 from accidental impulse action;
The lid 55 is also protected from unexpected impulse action, although to a lesser extent.

Forming a slight flattening in the hemispherical portion of the can lid plate 60 increases the height of the hemispherical portion in the area where the pressure relief tab 55 is to be formed, thereby allowing the adjacent area of the can lid plate 60 to The degree of protection given to tab 55 is increased.

It will be seen from the cross-sectional view of FIG. 10 that the top of the button 56 is located at the same general height level as the surrounding sheet metal of the can lid plate.

The can lid plate 60 is also preferably hemispherical for the following reasons. Making the can lid plate hemispherical increases the head space of the can in which the can lid is mounted. Furthermore, if the can lid plate is made into a hemispherical shape, the rigidity of the can lid increases. Finally, when the can lid plate is made into a hemispherical shape,
It appears that the buckling strength of this modified end is successfully enhanced. Tests performed on flat ends have shown that making the can lid hemispherical to a height of about 1.5 mm to about 30 mm increases the buckling strength of the can lid. Increasing the degree of hemisphericity also increased the degree of improvement in buckling strength.

The lids 50 and 52, and 50' and 52' may be formed on the green can lid by any suitable method, such as punching and reshaping raw end plate sheet metal. Under normal circumstances, the method used includes several independent die operations, and the punch (die) equipment used also has a large diameter to ensure separation between the sheet metal and the punch and die equipment. would require a conventional stripper plate and die ejector. Although the use of the stripper plate and ejector complicates the punch (die) device, it goes without saying that it is desirable to reduce the number of die operations.

One preferred method for forming an improved lid is described below. In the initial processing, the can lid plate is formed with a semi-spherical section with a slightly flattened top. In a second operation, the hemispherical part is pressed down to form the area 61 and a small depression in the area where the button 56 is to be formed. This recessed portion is then reformed into a flat top button 56 by flattening the top between two die members. In the fourth process, tabs 50 and 5
5 is sheared, and in the same process,
The outer periphery of the tab 50 is reshaped downward to form an upwardly raised region 53. This process is schematically illustrated in FIG. 12, which is a fragmentary cross-sectional view across tab 50, excluding tab 55. As mentioned above, the central portion of the tab is maintained generally at the same height level as the unsheared metal defining the hinge 52. In a fifth operation, the height of the metal shoulder defined by the sheared portion of the side of region 61 is reduced and the angle of the side with respect to the can lid is increased to enclose the opening. This creates some overlap between the sheet metal and tab 50. Finally, the outer periphery of the tab is coined to increase the area of the tab and the overlap area between the tab and the sheet metal surrounding the opening. The sheet metal surrounding the aperture 58 is also coined to create an area of overlap between the aperture and the pressure relief tab 55. The coining of the outer periphery of the tab 50 is preferably done close to the shoulder of the raised area 53 so that most of the metal elongation is outward rather than toward the center and rearward of the tab. become. To prevent excessive winding of the outer circumference of the tab during this processing operation, the edges of the tab are tightly clamped to the die member. Each of the processing operations mentioned above are well known to those skilled in the art and are therefore not shown in detail in the drawings.

From what has been described above, it will be appreciated that some processing steps have been artificially separated for clarity. When actually forming a can lid, certain processing steps may be combined into one die process or may be omitted from the steps described above. For example, the step of forming the depression may need to be performed in a separate step.

The above method for forming an improved lid has several advantages. Firstly, forming the lid in the downwardly pressed region 61 of the hemispherical can lid plate protects against accidental opening of the lid. Second, tab 5
Reshaping the outer circumference of the 0 downwardly allows its central portion to be kept at the same height level as the hinge portion 52, which appears to significantly improve the pressure characteristics of the converted can lid. This method of forming tab 50 also allows pressure relief tab 55 to be sheared from tab 50 in the same die process without undesirable deformation of tab 50.
Shearing the tabs to form the same type of lid combination in a plain or raised area of metal may result in the edges of the larger tabs being bent downwards, causing this The tab may need to be flattened or repaired in subsequent processing.

Although the forming method described above reduces the number of processing steps, the punching of the tabs 50, 55 may also be performed in combination with reshaping of the sheet metal surrounding the opening.
It has been found that it is also possible to form a downwardly depressed area 61 surrounding 0 and to combine it with the formation of the button 56. This single die processing is schematically illustrated in FIG. 13, which is a fragmentary cross-sectional view of the punch (die) apparatus in the area of tab 50, excluding tab 55. The punch P is provided with a shoulder and a central recess, and the die D is provided with a cooperating shoulder and recess to facilitate downward reshaping of the tab 50 and its surrounding portion 61. You will notice that there are locations.

A single machining operation of punching and reshaping is
It has been found that not only the number of die processing steps is reduced, but also the need for stripper plates and die ejectors is eliminated. It has been found that the resulting tabs and apertures are approximately the same size after punching and reshaping so that they do not jam in the die or punch.

The method described above has the further advantage that the central portion of the tab 50 is maintained generally at the same height level as the unperforated metal defining the hinge portion.

In a second processing step, the sheet metal surrounding the outer periphery of the tabs 50, 55 and the sheet metal surrounding the opening 51 are coined, and the necessary overlap between the tabs 50, 55 and the sheet metal surrounding them is coined. Create. Alternatively, the overlap can be created by the method described in the original specification. Following this, tab 5 to seal the two lids.
A sealant is applied in the area of the 0.55 cut edge.

The above-described method of forming an improved lid is preferred for several reasons. First, the punching and reshaping operations are performed in one die operation, thus reducing the number of processing steps and eliminating the need for stripper plates and die ejectors. Secondly, since the lid is formed in the downwardly pressed region 61 within the can lid plate, the lid can be protected against accidental opening of the can. Third, since the outer periphery of the tab 50 is reshaped downward, it is possible to keep its central part at the same height level as the hinge part 52, which ensures that the pressure characteristics of the converted can lid are well maintained. It seems to be an improvement. The method for forming this tab 50 also includes:
pressure relief tab 55 and tab 5 in the same die processing without undesirable deformation of tab 50.
It is also possible to shear from 0. Shearing the tabs to form the same type of lid combination in a plain or raised area of metal may result in the edges of the larger tabs being bent downwards, causing this The tab may need to be flattened or repaired in subsequent processing.

When forming the lid device shown in FIG.
It will be appreciated that the downward reshaping of the sheet metal surrounding tab 55' occurs during the first die cut. This method can also be used to form modifications as described below.

It will be appreciated that other formation methods may be used to achieve similarly good results. For example, the sheet metal surrounding opening 51 may be coined to increase the overlap between tab 50 and its periphery.
Alternatively, the overlap between tab 50 and its periphery can be created simply by appropriately reshaping the shoulders described above. The overlap between the pressure relief lid 55 and its surrounding sheet metal may preferably be formed as described above, since the method makes the button 56 larger and the outer periphery of the opening 58 more compact. This is because they can be located nearby. However, the necessary overlap may also be created by coining the outer periphery of tab 55.

It will be appreciated that the various lid members described in the original embodiments may be formed in much the same manner as the modified lids described in the previous embodiments. For example, in the embodiments of FIGS. 3 and 6, the dimensions of the depressed area are area 6
1, and the upright portion surrounding the opening may be flattened as shown in FIG. In the embodiment of FIGS. 7 and 8, locating the lid in the depressed area would eliminate the need to form protective ribs R.

The embodiment of the invention shown in FIGS. 14 and 15 is a modification of the embodiment of FIGS. 3 and 4, with the tab 20 in FIG. It has a similar sheared lid member or tab 70. The tab 70 has cutting lines 73 extending on both sides of the raised button 75,
It has a pressure relief lid or tab 72 defined by 74. The cutting lines 73 and 74 are approximately 60
The tab 72 is at the cutting line 7.
3,74 will work satisfactorily at any angle from about 30 degrees to 18 degrees, especially from 50 degrees to 18 degrees.
A 70 degree angle has been found to work most satisfactorily.

The tab 72 connects the connection 7 to the tab 70 in essentially the same manner as the embodiment of FIGS. 3 and 4.
6, but the angular characteristics of the cutting lines 73, 74 position the connecting portion 76 further away from the raised button 75 than in the embodiment of FIGS. 3 and 4. You will notice that you are doing so.

With respect to the illustrated tab dimensions and tab height, the tabs 72 cannot be opened more than about 3 to 5 degrees under normal operation, even with finger applied force. This angular range is
If the opening force is removed, the tab 72 will be
In normal use, it will always return to a nearly closed position.

The tab 70 is formed in a depressed region 77 formed in the same basic manner as described above in connection with FIGS. 9-12.
However, the method of forming pressure relief tab 72 is
It is formed within the cutting line 77. However, the method of forming pressure relief tab 72 has been modified to form cut lines 73,74. The cutting line 73,
74 is formed by a stepped punch during an initial processing step in shearing the tabs 70.
In this same initial processing, the remaining portion of tab 72 is also sheared, and as the punch descends, the sides of tab 70 are reshaped downwardly, and tab 70 is reshaped as described with respect to FIG. It will be cut off. The free edges of the two tabs 70, 72 are then arranged so that the two tabs are coplanar at the outer periphery of the tabs. Due to the formation of the cut line and the nature of the downward reshaping of the sides of tab 70, there is one material thickness between tabs 70 and 72 along the inner portions of cut lines 73, 74. This leaves tiers of (see Figure 16).

Tabs 70 and 72 are coined near their free edges to increase the overlap between them and their surrounding metal. This coining process is preferably interrupted at the cutting lines 73, 74 to allow tab 72 to be freed to open while being bent around connection 76.

If desired, the depressed area 77 may be
As shown in the sectional view of the figure, the can lid plate may be formed into a flat can lid plate to achieve the same degree of protection without having to make the can lid plate hemispherical. Similarly, the lid structure shown in FIGS. 3 and 4 could be formed by the method described above rather than the method described in connection with this example, or vice versa. It's okay. However, it is preferable to avoid movement of the punch structure.

Positioning the pressure relief opening and tab radially inward of the spout and spout tab at or near the center of the can lid, as shown in FIGS. 3, 6, 7, and 14; This has the advantage of locating the pressure relief tab in the best position and reducing the possibility that the level of liquid will exceed the pressure relief lid.

It can be seen that in each of the embodiments described above, the pressure relief tab and opening are considerably smaller than the air release tabs of prior art can lids, resulting in the tabs being significantly easier to open than prior art tabs. Dew. The tab V of the can lid of the prior art must act both as a pressure relief tab and as an air vent opening, and for this reason it must be sufficiently large and/or the second
It must be raised to such an extent that it can remain open permanently in order to fully perform its functions. It is understood that if the tab is small, it must be raised to allow access to the fingers, and if the tab is still small, there will not be enough suitable metal to raise it to the required degree. It will be possible. However, this is unnecessary, as the tab of the present invention only serves the function of pressure relief, or even enough to push the hand down into a position to bleed the can while pouring. A build-up is desirable and therefore in the second and third embodiments this can be achieved when the spout tab is opened. However, it should be appreciated that the pressure relief tab need not be smaller than tab V to achieve the benefits of the present invention.

Referring to FIGS. 17-19, a modified version of the pressure relief lid is shown. Again, the lid is formed within the depressed region of the can lid, and the general method of forming the can lid is substantially the same as described above.

The embodiment of FIGS. 17-19 has a fully sheared lid member or tab 80 that overlaps the metal surrounding the generally circular spout opening and It is located below and is also hinged to the can lid at 81. A pressure relief lid or tab 82 of the same type as tab 55 in FIGS. , and around the joint the tab 82 is bent in the same manner as described in the embodiment in question. As shown in FIG.
It overlaps with the surrounding sheet metal of 0 and is located below it. For this example, the overlap between tabs 80 and 82 includes the outer periphery of tabs 80 and 82.
It is increased by coining the sheet metal near the opening closed by. The dimensions of the tab 82 are:
It is chosen in relation to the original specification to prevent it from opening permanently due to finger force.

In use, tab 82 is opened to relieve pressure within the can. In most cases, when this pressure is released, the finger force applied to tab 82 will also cause tab 80 to open. However, because the tab 82 is located near the hinge line of the tab 80, it can be opened in an adjustable manner rather than abruptly, thus preventing the accidental injury of a finger by the side of the opening. could be prevented.

As shown in FIG. 19, when the lid 80 is opened, the lid 82 is forced open around the connecting portion 83, and since the hinge portion 81 and the connecting portion 83 are separated, the tab 82 The metal neck joining the connecting part 83 is displaced below the surrounding metal of the tab 80 and the can lid, forming a passageway 84 that allows air to escape during pouring or drinking. It will act as This improves the pouring and drinking characteristics of the can lid, especially if the user's mouth largely covers the spout opening.

A modification of the embodiment of FIGS. 17-19 is shown in FIG. In this example,
Spout tab 80' and pressure relief tab 82' are structurally similar to tabs 80, 82, except that tab 80'
2' is reversed, the main operating position is located outside the spout tab 80', and the tab 82' is located outside the spout tab 83'.
80'.

The primary advantage of this embodiment over previous embodiments is that when opening the pressure relief tab 82', the spout tab 82'
0' cannot be opened unexpectedly, and when tab 80' is opened to the position shown in FIG. 19, a large air vent passage is created since the main operating portion of tab 82' is removed from the opening. That's the point.

The same pouring and drinking characteristics may be obtained without using a resealable pressure relief tab of the type shown in FIG. However, using this type of tab is preferred for the reasons stated in the applicant's original specification.

Referring to FIG. 21, the can lid is formed with a fully sheared lid member or tab 90 which, like tab 80, overlaps and is located below the metal surrounding the opening. . Applicable tab 9
0 is hinged to the can lid around 91 and above the hinge line is formed a small non-resealable pressure relief tab 92 with a portion of the tab 92 protruding into the tab 90. There is. The tab 92 is basically formed similarly to the tab 82, except that
The tab 92 is used to release pressure within the can.
The difference is that it is hinged to the can lid around 93 so that the metal defining the connection is permanently deformed when opened. The spout tab 90
Once opened, the tab 92 will be further opened as in the previous embodiment to create a permanent air passage for pouring and drinking operations.

The embodiment of FIG. 21 can also be modified similarly to the embodiment of FIG. 19 by reversing tab 92.

It will be appreciated that in each of the previous embodiments, the shape of each tab may vary according to the designer's choice. For example, in FIG. 22, the embodiment of FIG. 17 has a tab 80'' that is oblate, a tab 82'' that is a circular operating portion, and a linear side portion that extends from there to a connecting portion 83”. Similarly, tab 80 or tab 82'' is modified to have a 9th neck.
It may also be pear-shaped as shown in the figure. 20th
Tabs 90 and 92 in the figure may be similarly modified.

FIG. 23 shows yet another modification example. In this embodiment, the tab 100 is pear-shaped and its hinge portion 101 is located near the recessed portion of the can lid. Pressure relief tab 102
is similar to tab 82, and its connecting portion 103 is similar to tab 1
It is connected to the can lid on the outside of 00 and is spaced apart from the hinge part 101. The two tabs have basically the same structure as in the previous embodiment.

The embodiment described above opens similarly to the lid shown in FIGS. 17-19, but the tab 102 does not act as an air vent during pouring and drinking. Instead, the opening created by tab 102 when tab 100 is opened facilitates additional evacuation of the can contents, thereby allowing hinge 101 to be located near the recess. This will overcome one of the inherent problems caused by

Tabs 80, 90, 80″ and tabs 82, 92, 8
2'' is located near the center of the can lid, it is desirable to limit the extent to which the tab can be bent around the hinge. This can be accomplished by forming a recess or a suitable shape on the underside of the tab 80'', the front edges of the tabs 82, 92, 82'' being engaged within the recess or shape. , whereby the tabs 82, 92, 82'' act as supports to prevent further bending of the tabs 80, 90, 80'', respectively.
In some cases, this function may be fully accomplished by frictional contact between the two tabs or by a sealant applied to the tabs.
In such a case, there is also less chance of the metal in the hinge connecting the tab to the can lid breaking.
This is not a problem with the embodiment of FIG. 23 since it prevents the can wall from bending more than about 90 degrees.

The embodiments of FIGS. 17, 20, and 21 are similar to those disclosed in the Wirth et al. patent in that the pressure relief tab is located partially within the spout tab.
It has some similarities to the can lid described in 3741432. However, in the present invention, the pressure relief tab is located partially outside the spout tab and its hinge or connection is not coincident with the hinge connection between the spout tab and the can lid. This means that when a spout tab is opened, there is a remote pressure relief outside the opening closed by the spout tab, regardless of whether the pressure relief tab has been opened before. Provides the outstanding advantage of forming a mouth. The Wirth et al. patent states that when tab 15 is opened, pressure relief tab 21 remains open to create a pressure relief opening through which a sufficient amount of air can be added. , during normal pouring or drinking operations from the can, does not appear to contribute much to the passage of the contents within the can. However, if the can is tilted so that the main opening is submerged in liquid, the opening created by tab 21 will also be submerged, thereby preventing air from entering the can. It will be.

In the embodiments described above, the remote pressure relief opening will remain open even if the spout opening is filled with liquid because the pressure relief tab extends outward beyond the spout. Furthermore, even if the entire spout opening is blocked by the user's mouth, the pressure release port created in this embodiment will not be blocked during the drinking operation. rare.

The various shapes of the openings shown in FIGS. 3, 6, 7, and 14 are not essential and may therefore be modified without affecting the characteristics of the lid described above. good. It can be seen that the sides of the pear-shaped opening 21 are slightly curved outwards, making it more appealing to the human eye. Similarly, pressure relief tab 28 is similar to tab 1 shown in FIG.
1 or may be formed in any other suitable shape of the lid.

While each of the embodiments described above has sheared tabs, the present invention provides for sheared tabs delineated by scorelines or other shaped lines of weakness, such as those shown in U.S. Pat. No. 3,334,775. The same can be applied to the lid.

The lid of the present invention can be used as a can lid or other container component, and can be formed of any suitable sheet metal material, including aluminum and steel, and can be used as a can lid or other container component. It may have any suitable shape, depending on the shape of the can body to which it is being attached. It is also contemplated that the lid may be made of plastic material by suitable molding techniques.

Typically, spout lids are sized to prevent the user's fingers from entering completely, and are large enough to allow proper drainage of the contents of the can; There is no significance as to the absolute dimensions of the spout lid. Similarly, the absolute size of the pressure relief or air vent opening is not critical, but the opening will normally be sized to prevent the user's finger from being fully inserted into the canister when releasing the pressure. It is sufficiently large that it can be appropriately released by internal pressure, and that air can be appropriately taken in when venting air.

The sealant used for the cut lid is
It can be any suitable device or material, such as sealing compound, plastic tape, adhesive foil, hot melt material, combinations thereof, and the like. A particularly suitable sealing mixture is polyvinyl chloride in suspension combined with conventional plasticizing and mixing components. Such suspensions are heat-cured to form a non-stick, somewhat deformable solid material that holds the lid in place and resists the pressure normally encountered in carbonated and malt beverage cans. Sealing performance can be ensured under The sealant is
Each lid must be sufficiently brittle to break when finger pressure is applied.
The maximum angular displacement of the lid mentioned above applies only to the indicated aluminum grade and its indicated thickness. As these and other changes occur in the structure of the lid, its maximum allowable displacement angle will also change.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a can lid according to the prior art, Fig. 2 is a plan view of a simple example for proving its operating principle in comparison with a can lid according to the prior art, and Fig. 3 is a plan view of a can lid according to the present invention. One preferred practical real-world plan view, FIG.
Figure 5 is an enlarged fragmentary side sectional view of the can lid shown in Figure 3.
A schematic, fragmentary, side cross-sectional view of a die arrangement suitable for forming the lid shown in FIGS.
7 is a plan view of a modification of the embodiment of FIG. 3; FIG. 7 is a plan view of another preferred embodiment of the invention; FIG. 8 is an enlarged fragmentary view taken along line 8--8 of FIG. FIG. 9 is a plan view of still another form of the present invention;
10 is an enlarged side sectional view taken along line 10--10 of FIG. 9; FIG. 11 is a fragmentary plan view of a modified example of the embodiment of FIG. 9; and FIG. 12 is a view of FIGS. 9 and 10. Schematic diagram of one processing step to form the lid of the 1st
3 is a schematic diagram similar to FIG. 12 showing a modified method of formation; FIG. 14 is a plan view of yet another preferred embodiment of the invention; and FIG. 15 is a diagram taken along line 15--15 of FIG. 16 is a fragmentary side sectional view of the lid of FIGS. 12 and 13 formed in the depressed region in the plain can lid plate; FIG.
The figure is a plan view of still another embodiment of the present invention, No. 18.
19 and 19 are enlarged side cross-sectional views taken along line 18-18 of FIG. 17, and FIGS. 20, 21, 22, and 23 are fragments of modifications to the FIG. 17 embodiment. FIG. In the figure, 20, 20', 31, 50, 5
0', 70, 80, 80', 80''...Spout lid, 22, 32, 52, 52', 71, 83, 8
3', 83''...Connection part (hinge part), 25, 26,
27... Cutting line, 28, 28', 34, 56, 7
5, 82, 82', 82''...Pressure release lid.

Claims (1)

Claims: 1. A push-on pressure relief lid on a container suitable for pressurized liquids, the lid being integrally formed with a portion of the container and provided with at least one weakened line. a lid member having a dimension that can be opened by a pushing force of a finger resisting the pressure, the lid member having an operating portion that receives the pushing force when in use, and a connecting portion. a push-in pressure release lid, wherein the lid member and the connecting portion and/or the portion of the container surrounding the lid member are arranged such that the lid member is permanently released by a finger push force; forming a device that substantially prevents the closure of the container, such that the closure member is substantially closed to prevent froth and/or pressurized liquid from escaping from the container when the finger push force is removed. Push-in pressure relief lid that features a return to position. 2. In the push-in pressure release lid according to claim 1, the lid member is formed at an angle that exceeds the elastic limit of the metal at the connecting portion due to a pushing force applied by a finger to the lid member. A push-in pressure relief lid configured to prevent further deformation. 3. In the push-in pressure release lid according to claim 1, the operating portion is raised relative to a portion of the container surrounding the operating portion, and the degree of protrusion of the operating portion and/or Alternatively, the effective dimensions of the operating portion suitable for pushing force by a finger are such that in normal use, the pushing force by a finger moves the lid member around the connecting portion due to the elasticity of the metal forming the connecting portion. It is selected to such an extent that it cannot be deformed beyond a limit, so that even when the pushing force is applied, the lid member is permanently opened at least while the lid member is exposed to the pressure within the container. Push-in pressure relief lid that won't leave you stranded. 4. In the push-in pressure release lid according to claim 2 or 3, the operating portion and the connecting portion are sufficiently separated from each other to prevent deformation beyond the angle. Release lid. 5. The push-in pressure release lid according to claim 3, wherein the container is formed with a spout lid member defined by at least one weakened line, and the spout lid member is defined by at least one weakened line. The lid member has a narrow end and a wide end, and a pressure relief lid member is formed as part of the spout lid member and is located at the narrow end, and the connection of the pressure relief lid member includes two defined by a narrow neck of metal between the wires, said two wires being weakened to be severed by at least said pushing force and being separated from each other from both edges of said spout lid member. Push-in pressure relief lid extends toward the front. 6. The push-in pressure relief lid of claim 5, wherein the spout lid member is sheared from the container to remove the metal of the neck, and the neck remains close to the spout during the opening operation. A push-in pressure relief lid that acts as a hinge to the lid member, the two lines being cut lines formed in the spout lid member. 7. In the push-in pressure release lid according to claim 6, the spout lid member overlaps with and is located below a portion of the container surrounding the spout lid member. a push-in pressure relief lid, wherein the metal on either side of the cut line is in substantially the same plane. 8. The push-in pressure release lid of claim 7, wherein the container is a can, and the narrow end of the spout lid member is formed adjacent to the center of the can lid of the can. Push-in pressure relief lid. 9. The push-in pressure relief lid of claim 3, wherein the container is formed with a spout lid member defined by at least one weakened line, and the spout lid member is formed with a spout lid member defined by at least one weakened line. has a narrow end and a wide end, and a pressure relief lid member is formed as part of the spout lid member and is located at the narrow end thereof, and the connection portion of the pressure relief lid member is connected to the spout lid member. Narrow neck near both edges of the member,
a push-on pressure relief lid defined by at least one weakened line extending substantially across the spout closure member to be severed by the push-down force; 10. The push-in pressure release lid of claim 9, wherein the line is a cut line formed in the spout lid member. 11. The push-in pressure relief lid of claim 4, wherein the container is formed with a spout lid member, the pressure relief lid member being formed as an integral structural extension of the spout lid member. ,
A push-in pressure release lid wherein the pressure release lid member is removed from its closed position when the spout lid member is opened, thereby providing an air vent opening for pouring operations. 12. The push-in pressure relief lid of claim 11, wherein the spout lid member is sheared from the container to remove metal at the neck, and the neck is sheared from the container during the opening operation. A push-in pressure relief lid that acts as a hinge to the mouth lid member. 13. In the push-in pressure release lid according to claim 4, the pressure release lid member is formed by being sheared from the container, and the operating portion of the pressure release lid member is a narrow and elongated portion extending to the connecting portion. a push-in pressure relief lid located at one end of the container, the operating portion being in an overlapping relationship with and below the surrounding portion of the container; 14. In the push-in pressure release lid according to claim 13, the pressure release lid member:
A push-in pressure relief lid formed within a larger lid member that acts at least substantially as a spout lid member. 15. A can lid for a container suitable for pressurized liquids, which has a spout lid and a pressure release lid that can be opened by pushing force with a finger, wherein the pressure release lid is adapted to release the pressure release lid. In cooperation with the can lid portion around the lid, it physically limits the extent to which the pressure release lid is dented by the pushing force of the finger, and when the pushing force of the finger is removed, the pressure release lid is almost dented. A can lid that is characterized by being able to be returned to the closed position. 16. The can lid according to claim 15, wherein the pressure relief lid is attached to the can lid by an integral connection, and the pressure relief lid resists deformation due to the pushing force of the finger. A can lid that is constructed so that the angle does not exceed the yield point of the metal at the joint. 17 at least one push-in pressure release lid member that is opened by a finger push force and returns to a substantially closed position to prevent froth and/or pressurized liquid from escaping when the push force is removed; a spout lid member defined by a line of weakening, the pressure relief lid member being partially within the spout lid member and partially within the spout lid member; Formed on the outside of the spout lid, the pressure relief lid is permanently opened by opening the spout lid and prevents the contents of the container from being released during pouring or drinking operations. 1. A container component forming an air vent passage for assisting in removing air. 18. The container component according to claim 17, wherein the container component is formed from a sheet metal, and the spout lid member and the pressure release lid member are connected to the container component. the spout lid member and the pressure relief lid member overlap and are located below the sheet metal surrounding the opening covered by the lid member; Container components in relationship. 19. The container component of claim 17, wherein the spout lid member and the pressure relief lid member are integrally joined near the outer periphery of the container component, thereby permanently opening the container component. A container component in which a pressure relief lid creates a liquid evacuation opening that facilitates substantially complete evacuation of the contents within the container. 20 Container components for pressurized liquid containers, comprising a push-open spout lid defined by at least one weakened line; A container component having a small diameter pressure relief lid that is defined and opened by pushing force, wherein the pressure relief lid is formed partly inside the spout lid and partly inside the spout lid. 1. A container component, characterized in that it is formed on the outside of the spout lid, is permanently opened by opening the spout lid, and forms an air vent passage that assists air venting when pouring out or drinking the contents of the container. 21. The container component according to claim 20, wherein the pressure relief lid has a connection part that is integrally connected to the container component or the spout lid, and the connection part is connected during the opening operation. a container component configured to bend around the container and return to substantially its closed position when said pushing force is removed; 22. The container component according to claim 21, wherein the pressure release lid is prevented from deforming beyond the elastic limit of the metal in the connecting portion due to a finger pushing force. 23. The container component according to claim 22, wherein the pressure relief lid extends from the connecting portion to the container component to prevent deformation of the connecting portion from exceeding the angle. Container component. 24. The container component of claim 20, wherein the pressure relief lid has a connection portion that is integrally connected to the container component and bends around the connection portion during an opening operation; A container component configured to permanently deform the coupling portion upon an opening operation. 25. In the container component according to any one of claims 20 to 24, the container component is formed from a sheet metal, and the spout lid and the pressure release lid connect these lids to the container. Sheared from the sheet metal except for connections connecting the components, the spout lid and the pressure relief lid overlap and extend below the sheet metal around the opening covered by the lids. Container components in a positional relationship. 26 In a container lid used for a pressurized liquid container,
push-fit easy-open spout lid defined by at least one weakened line and openable by push-in force; a smaller pressure relief lid formed partially on the inside of the spout lid and partially on the outside of the spout lid; The spout lid is permanently opened by opening the spout lid, and these lids are integrally connected to the container lid at a position close to the outer periphery of the container lid. Container lid, characterized in that the pressure relief lid, thereby permanently opened, creates a liquid evacuation opening, said evacuation opening facilitating substantially complete evacuation of the container contents.