TW450921B - A package, a lid assembly, and a vent device accommodating equalization of the internal pressure of the package or other enclosure with the external ambient air pressure - Google Patents

Abstract

A package (15), lid assembly (20), and a vent device (24) are provided for decreasing the difference between the internal pressure within a package (15) and the external ambient air pressure. The vent device (24) is provided for mounting to the wall (26) of a package (15) or other enclosure wherein the wall (26) has an aperture (28) in which the vent device (24) is disposed. The vent device (24) includes a tubular portion (50) having a passage (52) extending therethrough. A valve (80) is disposed within the tubular portion (50) across the passage. The valve (80) includes a sleeve (117) and an occlusion member (82) which has at least two slits (84) extending therethrough. The slits (84) are closed when there is no pressure differential across the occlusion member (82). The slits (84) open when exposed to a predetermined pressure difference between (1) the ambient atmosphere outside the package (15) or other enclosure, and (2) the gases inside the package (15) or other enclosure.

Description

450921 V. Description of the invention (1) Technical scope The present invention relates to product packaging, in particular to a package, a lid assembly and a vent device for equalizing the internal pressure of the package or other closure with the external air pressure. The present invention is particularly suitable for use in a system for containing edible products that are cooked or heated and then cooled. Background of the invention and known technical problems A system for cooking or heating an edible product in a microwave oven has been sold in the United States. Such systems are disclosed in the world patent application PCT / US97 / 04580 (publication number ff98 / 08748). The system includes a container with a lid assembly. The lid assembly is adapted to be sealed (and subsequently removed) from the container into which the food product is placed. The cover assembly includes a cover provided with a middle hole and a plurality of spaced-apart vent holes surrounding the central hole. A flexible tubular member is installed in the center hole, and one end of the flexible member includes a flexible annular flange or a disk-like member extending radially on the outside of the cover to cover the vent holes. The flexible member in the cover hole has a recessed portion penetrating through the hole. The recessed portion terminates in a closed lower end portion below the inside of the cover and defines a slit, which is normally closed. The method of using the above system is as follows. An edible product is placed in the container and covered with the lid assembly. The package was exposed to microwave radiation in a microwave oven. Microwave radiation heats the edible product, and the vapor pressure in the container increases. When the internal steam pressure is sufficiently increased, the disc above the vents deforms or flexes slightly to allow steam (such as water vapor) to escape from the interior of the container. In this way, the normal control release of steam during the heating process is provided. Β When the heating process ends, and / or the vessel stops generating steam,

Page 6 45 092 1 5 'Description of the invention (2) The disc above the hole returns to the exhaust hole, and the cover assembly can be removed when the cover assembly is close to the heating and there is hot steam when the cover assembly is removed. In terms of covering, store any remaining edible, for example, in a refrigerator. Low container. The flexible structure located in the center hole is opened under the pressure difference to allow the outside air to be so inclined to face the cover inwardly. When sufficient outside air flows into the container, the seam will be closed to reduce the free access to possible air or contaminants. Therefore, it is desirable to propose an improved closure (such as a food package) into the closure. Specifically, it is intended here to propose a more reliable but less complex ventilation junction that causes ventilation in and out of a closure. In addition, 'if such improved systems require a number of ventilation effects on a package, it is beneficial. 》 I also want to propose an improvement when the outside air is not exhausted or any obvious leakage. The original sealed position of the side "Danger of release after using or cooking edible products at this time β The cap assembly can be reinstalled in the container product. After being capped, the container can be cooled. The cooling may cause the internal pressure drop of the container. The slit at the lower end of the closed part will allow a sufficient airflow into the container to balance the pressure. The possibility of internal deformation of the device is minimized. After the internal and external pressures are balanced, the narrow edible product causes adverse effects of bismuth; the external is the smallest. The system allows steam to escape from the system during the heating process and air to the system during the cooling process, which can work at a lower pressure difference. It would also be advantageous if such improved systems could operate effectively in a structure. Depending on a particular edible product or expected to be provided in and out of the package at different locations, the system ’will not leak any steam when it is not in the package.

450921 V. Description of the invention (3) It would also be advantageous if these improved systems could be used with packages of various shapes and made of various materials. In addition, 'want to make these improved systems provide high efficiency, high quality, large volume manufacturing technology to reduce the return rate of finished products to produce a system with consistent exhaust and intake characteristics.' The present invention proposes an improved system, which can Provide a design with these benefits and qualities. Summary of invention

The present invention proposes a system for venting a closure (such as a package, a container, a storage tank, etc.) during heating (such as generating a gas or steam and / or expansion in the package) and cooling process. Medium (when the pressure in Baojie 1 is reduced) minimizes the difference between external pressure and internal pressure. The system of the present invention is suitable for a variety of different packages that can be heated and / or cooled to a temperature range by a number of different methods. D The components of the system of the present invention are easier to manufacture, and these components work well to provide consistent exhaust. Characteristics and leakage during non-operating hours of the ventilation system may be low. The system of the present invention is particularly suitable for providing venting into and out of a closure at lower pressure differentials (e.g., ^ 0 inch water column pressure differential or less). According to an aspect of the present invention, a vent device for a closure is proposed. The closure may be, for example, a microwaveable package or other package, wherein the package is suitable for containing an edible product. The closure has a wall definition (1)-outer surface '(2)-inner surface and (3) a hole extending between the outer surface and the inner surface.

450921

Page 9 V. Description of the invention (4) The vent device includes-a tubular portion. The tubular portion (a) passes through the hole and forms a '-seal between the tubular portion and the wall of the hole'-a seal and (b) a definition-a channel Pass through the hole. The valve is disposed in the tubular portion and spans the passage. The valve includes a blocking member, the blocking member has at least two penetrating slits, and the at least two slits do not cross the blocking member. When the pressure difference is closed, and there is a pressure difference between the external environment of the closure and the gas inside the closure, so that the pressure inside the closure exceeds the pressure outside the closure by a predetermined amount, the at least two slits will be opened. Another aspect of the invention »Proposed here-a package for an edible product The package must be heated and cooled. The package includes a container ^ containing the edible product * and the The package has an opening Π 0 to provide a cover around the opening σ to close the container. The cover has an outer surface and an inner surface. The cover defining hole extends between the outer surface and the inner surface. A vent device is installed on the cover to span the hole. The vent device has a tubular portion (a) passing through the hole and between the tubular portion and the cover. A seal 9 is formed between the holes and (b) defines that the channel passes through the hole. A valve is disposed in the tubular portion and spans the channel. The valve includes a blocking member having at least two penetrating cross slits. The at least two slits are closed when there is no pressure difference across the blocking member and between the external environment of the closure and the gas inside the closure. A pressure difference causes the pressure on the inside of the closure to exceed the pressure on the outside of the closure by a predetermined amount to open the at least two slits. Another aspect of the present invention relates to a seed cap assembly for covering a container. Open a. The cover assembly includes a cover garden around the opening D. The container is closed. 4 5 09 2 1 V. Description of the invention (5) The cover has an outer surface and an inner surface. The cover defines a hole extending between the outer surface and the inner surface. The cover assembly further includes an air vent device (1) mounted on the cover across the hole, and (2) a tubular portion (a) passing through the hole and between the tubular portion and the hole of the cover A seal is formed, and (b) defines a passage through the hole. The vent device also includes a valve disposed within the tubular portion and spanning the passage. The valve includes a blocking member having at least two penetrating cross slits, the at least two slits are closed when there is no pressure difference across the blocking member, and the external environment of the closure and the gas inside the closure There is a pressure difference between which the pressure on the inside of the closure exceeds the pressure on the outside of the closure by a predetermined amount to open the at least two slits. The detailed description of the following invention, the scope of patent application and the drawings will make many other advantages of the invention and Trait is more bright. The drawings are briefly explained. The same numerals in the figures represent the drawings. Part of this specification represents the same parts. Figure 1 is a perspective view of a package of the present invention; Enlarged exploded perspective view of the cover of the package and the vent hole mounting portion; Figure 3 is a top circle view of the vent device; Figure 4 is a side elevation view of the vent device; Figure 5 is a bottom plan view of the vent device; 6 is an enlarged section circle taken along the 6-6 plane in circle 3; FIG. 7 is a plan view of the cap assembly used in the package shown in FIG. 1

4 5 092 1 ~ 丨 — 1 — V. Description of the invention (6) Figure 8 shows the noodle garden taken along the plane 8-8 in circle 7; Figure 9 is a partially enlarged sectional view taken along the plane 9-9 in circle 7 Sleepy 10 is similar to FIG. 9 'but is more enlarged, and the moving position of a part of the vent device is shown by a solid line in circle 10' and the unstressed normal position of the part of the vent device is shown by a dashed line: FIG. 11 Similar to circle 10, but Fig. 11 shows that one of the functions of the vent device is called the back stage, at which time the vent device is opened to the outside to allow the internal steam to be discharged through the vent device; Figure 12 is similar to Figure 11 ' The vent device is opened inward to allow outside air to enter the container through the vent device. DETAILED DESCRIPTION OF THE INVENTION Although the present invention may be embodied in many different forms, the present specification and this specification set forth some specific forms as examples of the present invention. In any case, the present invention is not limited to the embodiments disclosed in this specification. The scope of the invention is set forth in the appended claims. For the convenience of description, the system of the present invention is described in a normal (upright) operating position. Directional words such as up and down 'horizontal' are used with reference to this position. However, it should be understood here that the system of the present invention can be manufactured, stored, transported, used, and sold in locations other than the upright positions described herein. Figure 1 depicts a package 15 in which an edible product (such as food, water, etc.) is heated and then cooled. The package 15 can be provided to consumers in a state where an edible product is contained. Alternatively, the package 15 may be provided as an empty package to the consumer ' The consumer may place an edible product into the package 15.

4 5 092 1 V. Description of the invention (7) The package 15 includes a container 18 (9. The package 15 further includes a container assembly with an opening-shaped seal mounted on the upper end of the container 18. The cover assembly 20 includes a cover 22 and One is embedded in the center of the cover 22. The cover 22 has a middle 9) defining a hole 28 (囫 2 and 9) inside the through hole. The package 15 itself does not need to include a generation of embodiments (not shown in the figure). The package-enclosed unitary structure defines a device. The holes of this unitary-type closure are also independent, and this opening is allowed for example. The food item is removed from the package through the opening. The cover of this one is 22 small. In addition, the access opening, or even the bottom of this container (such as food), is loaded into or removed from the package, located in the upper part of the package or other closure and the hole that houses the vent device. It is more preferred that this or one of the other closures has a top wall, a top of the package 15 shown in Figs. 1 and 8 rather than a hem 30 to be accommodated outside the container 18, which has an open upper end u and 8) and 8). The cover assembly is suitable for forming a leak-proof ring vent device 24 around the opening, and the vent device central wall body or wall part (Figure 2, 8 and part of the vent device 24 is arranged on the cover 22) One of the pieces 15 is expected that the replacement piece 15 may include a container having a large wall with a hole to receive the vent hole and an opening for entry and exit, and the vent hole being sealed with a detachable cover. The port shown in Fig. 1 and 8 can be placed in the package and can be located in a side wall portion of a side wall of a container. Although the opening for allowing access to an article or other closure can be a side wall or a bottom Inside the wall, the vent hole assembly is preferably located in a package or other closure, and an air vent device is located in the canopy portion or the top portion of these packages. In a preferred embodiment, the cover 22 includes an annular side upper peripheral upper hem 30. One on

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Page 12 45 092 1 V. Description of the invention ⑻ ~ --- The inner area of the part may be provided with a suitable sealing structure such as an inner lip protrusion or groove (not shown in the upper part) to receive the upper edge of the container 18. In a presently preferred embodiment, both the container 18 and the lid 22 are molded from polyethylene such as polyethylene and have some elasticity. The lid hem 30 is slightly more flexible than the surrounding edges of the upper part of the container to allow Removal of the lid 22 »π The cover 22f is installed on the container 18 and the secondary piece forms a leak-proof sealing joint 5 × 30 and the edge of the container is specially designed. The lid and the container leak-proof sealing joint are designed as = Known by the artist. …: F 2 including one or more outwardly extending protrusions or handles 32 to facilitate carrying the package 15 when the lid 22 is securely mounted to the container 18. In a preferred embodiment, the cover hole 28 is substantially circular, and the cover wall 26 is: a cover 2 2 2 2 annular flat area. Preferably, the wall 26 is slightly below the concave region. For this reason, the cover 22 includes-an oval depression = 36 two circles 2 and 8) which rises from the outer periphery of the wall 26 to one inside the cover, plus p i as an annular intermediate surface 40. The outer periphery of the intermediate surface 40 merges with a ring-shaped region 42, and the chin 30 hangs from the outer periphery of the coronal region 42. The inner surface of the lower part 3bs preferably includes a plurality of surrounding spacer ribs 33 (圏 8) = shown in Figure 3-6. The preferred form of the vent device 24 is a one-piece molded structure, which is preferably made of Dow Corning, USA. Company (D〇wc〇rning

O: \ 63 \ 63289.pul page 13 to join the outer surface of the upper part of the trough 18. 4 5 092 1 V. Description of the invention (9)

(Corporation) made of SILASTIC LSR or DC-595 trademark liquid silicone rubber mold. The vent device 24 is adapted to be pressed into the hole 28 to form a snap-fit with the cover 22. Referring to the circle 9, the cover 22 includes an outer surface 21 and an inner surface 23. The hole 28 extends between the outer surface 21 and the inner surface 23. The vent device 24 has a number of characteristics (described below) that facilitate assembly and engagement between the device 24 and the cover 22. Referring to Fig. 6, the vent device 24 has a central tubular portion 50, the tubular portion 50 passes through the cover hole 28 (Fig. 9) and forms a seal between the tubular portion 50 and the cover 22 at the hole 28. The tubular portion 50 defines an internal passage 52 (FIG. 6). Preferably, the tubular portion 50 has a cross section that is equidistant from the central longitudinal axis 60 (FIG. 6) in all locations. Therefore, the ' channel 52 is positioned approximately concentrically within the cover hole 28 (FIG. 9). … The upper end of the tubular portion 50 terminates in a flange 62, as shown in Figure 2-6. The flange 62 is substantially annular, of equal thickness, and is slightly convex when viewed from the upper side of the vent device 24 (not before the cover 22). When the vent device 24 is mounted on the cover 22, the 'flange 62 is deformed upward into a substantially horizontal flat structure and is maintained in a slightly stressed state in this form. The tubular portion 50 has a shoulder 66 between its upper and lower ends. The shoulder is generally annular and defines an undercut 68 (FIG. 6) to receive one of the inner peripheral edges of the cover 22 around the hole 28, such as Figure 9 shows. The lower end of the tubular portion 50 defines a frustoconical cone or introduction surface 70 (囷 6). The vent device 24 is inserted into the cover 22 by pushing the frustoconical introduction surface 70 against the inner peripheral edge of the cover 22 to the hole 28. The tubular portion 50 is extruded radially inward and deformed sufficiently to allow the introduction surface 70 to pass through the hole 28 to the shoulder

O: \ 63 \ 63289.ptd Page 14 4 5 092 1 V. Description of the invention (ίο) The surface of 66 is positioned under the inner surface 23 of the cover and then buckled to the inner surface 23 of the cover (as shown in 囷 9). The inner periphery of the cover 22 is sandwiched between the shoulder portion 66 and the flange 62. In addition, the tubular portion 50 has a large enough diameter between the shoulder portion 66 and the flange 62 so that a leak-proof seal is formed along the edge of the hole 28. As shown in FIG. 6, a valve 80 is disposed in the tubular portion 50 and spans Channel 52. The valve 80 includes a blocking member 82. The latching member has at least two intersection slits 84, preferably two slits 84 (FIG. 3) crossing each other perpendicularly, and these slits penetrate the latching member 82. The cross slit 84 is self-sealing in a closed state without a pressure difference across the blocking member 82. The cross slit 84 defines four folds 86 (FIG. 3), and the four folds each define a circle sector and have the same size. In certain contemplated embodiments 'there may be three or more slits 84 β finger 86 that is closed without a pressure difference across the closure member 80 (〇6)' and the closure member 80 is exposed to the package 15 When there is a pressure difference between the outside air and the package. The flap 86 deflects to an open state so that the slit 8 4 is opened. When the slit 8 4 is opened, the pressure between the inside and the outside of the package 15 The difference is substantially eliminated or at least weakened or minimized by the airflow through the open valve slit 84. As shown in Figures 6 and 9, the valve 80 includes a short annular sleeve 117 which extends inwardly from the inner surface of the tubular wall portion 50. The inner side of the sleeve 117 is connected to the valve closing pin structure, and the outer periphery of the sleeve 82 is merged. The locking member 82 (circle 6) of the β 圊 valve 80 has a circular flat shape, and has a generally tapered structure. Thicker 'is thinner in the radially inner part. This tapered configuration helps to achieve one of the 阙 80 pop-up / closing actions. More specifically, as shown in circle 6, the valve blocking member 82 has an outer side or surface

Page 15

V. Description of the invention (11) The surface 138 has an arched concave lateral structure, which is curved outward toward the outside of the package 15 and is defined by a first predetermined radius. The outer surface 138 of the valve head continuously extends from the quick-connecting sleeve 1 1 7 β. As shown in circle 9, the blocking member 82 also includes an inner side or surface 139 (Fig. 6). The lateral configuration is curved inwardly toward the interior of the package 15 and is defined by a second predetermined radius. The radius of the edge portion 14 of the inner surface 139 is larger than the radius of the outer surface 138, so that the surfaces 138 and 139 converge toward the center of the latching member 82 and provide the aforementioned tapered configuration of the latching member 82. The inner surface 139 of the closure member 82 also includes a central portion 141 having a circular planar shape with a generally flat lateral configuration and oriented approximately perpendicular to the longitudinal axis of the valve 60. The central portion 141 of the blocking member 82 helps to improve the switching characteristics of the valve flap 86 defined by the slit 84, as described below. The radial outer periphery of the lower part of the locking member 82 is defined by a circular edge 142 (FIG. 6). The inner edge of the cylinder 117 is therefore thicker than the inner edge of the sleeve 117 that is engaged with the closing member 82. As shown in FIG. 10, a rounded edge 144 is defined at the intersection of the edge portion 140 of the blocking member and the center portion 14 1 of the blocking member. The connecting sleeve 117 is unfolded from the tubular portion 150 in a radially inward direction, and also protrudes upward toward the outside of the vent device 24. The inner end of the connecting sleeve 17 is connected to the edge of the closure member 8 2 and its related geometry to increase the torque effect of pushing the valve flap 86 open.

450921 V. Description of the invention (12) The slit 84 is preferably formed by cutting through the central portion 141 of the locking member 82, without removing any solid material from the cut-through portion, resulting in opposite sides 158 and 159 on each flap 86 ( As shown in FIG. 11), when the flaps 86 are in the normally fully closed position, the opposite sides 1 58 and 1 59 of two adjacent flaps 86 can be sealed against each other. The sides 158 and 159 of each valve flap 86 meet at the free end to define an end edge 160. The length and position of the slit 84 can be adjusted to change the predetermined opening and closing pressure of the valve flap 86 and other dispensing characteristics of the vent device 24. According to other aspects of the present invention, it should be understood that the slit 84 and flap 86 may have different shapes, sizes, and / or configurations depending on the desired characteristics. For example, there may be three or more slits 84 »Three or more slits 84 may also be used. Other openings can also be added in question 80. The circular indication self-sealing valve 80 is preferably specially designed to be used with a specific container and a special type of fluid product (for example, generating steam) to achieve the required reliable ventilation characteristics. The rigidity and stiffness of the valve material, as well as the size and shape of the closure member 82 and the connection sleeve 117 are also important to achieve the desired ventilation characteristics. "It has been found that a special vent device configuration is particularly effective. Referring to Figure 6, the diameter 1) | is 11,43 mm (0.45 inches), the diameter IV is 10.54 mm (0.415 inches), and the diameter! ≫ 3 is 5.97 mm (0.235 inches) 'diameter 1) 4 is 34.29 mm (丨 .350 inches), diameter 1) 5 is 12.97 mm (0.511 inches) 'diameter D6 is 16. 61 mm (0.654 inches), diameter D7 is 14. 12 cm Centimeters (0.556 inches), diameter daggers are ^^ mm (0.45 inches). Thickness' is 0.51 mm (0.020 inches), thickness T2g is 0.3 mm (0.0012 inches), thickness 1'3 is 0.38 mm (0.015 inches), size 1 \ is 0.13 mm Centimeter (〇, 0〇5

Page 17 45 092 1 V. Description of the invention (13) inches), thickness T5 is 1.31 mm (0.051 inches), thickness 1 ^ is 7.63 feet (0.300 inches) 'thickness T7 is 3. 15 feet (0,124 inches), and the thickness T is 1.02 mm (0.040 inches). Angle A is 40. , Corner eight 2 is 5. , The angle is 30. , Corner eight 4 is 4. , Horner 5 is 4. . The radius R is 12.95 metric meals' (0,510 inches), the radius 1 to 2 is 4.75 mm (0.187 inches), and the radius 1 {is the spherical radius of the upper surface of the flange and is 130.50 mm (5.138 inches) ), 3 radius R4 is 0.38 mm (0.015 inches) 'radius 1 ~ 5 is 0.38 mm (0.015 inches), and the convex radius Re is 0.64 mm (0.025 inches). The slits 84 each have a length of about 5.97 mm (0.235 inches) and are concentrated in the central portion 141 of the valve. The valve 80 is a unitary structure with the entire vent device 24. It is shaped by Dow Corning's DC-5 9 5 trademark liquid silicone rubber chess. ° Experimental tests on vent devices with the dimensions and characteristics specified above Reveal the following operating characteristics. When the convex side 139 below the closed valve 80 receives an internal pressure of a predetermined amount of water column about 10 inches greater than the external pressure, the valve opens outward to discharge some internal air. ~ When the pressure difference across the externally opened valve 80 is sufficiently reduced to less than 10 inches to the water column, the valve 80 will automatically close. # When the closed valve 8 0 below the convex side 1 3 9 receives an internal pressure less than the external pressure that causes the external pressure of the container to exceed the internal pressure of the container by a predetermined amount of about 6 inches of water column, the valve opens inward to discharge some external air. When the pressure difference across the internally-opened valve 80 is sufficiently reduced below 6 inches of water column, the valve 80 will automatically close. In a modification of the expected valve operating characteristics, a predetermined pressure difference (e.g., 10 inches of water column) to open the valve 80 and a predetermined pressure difference to open the valve 80 inward

Page 18 45092 \ 5. Description of the invention (u) (for example, 6-inch water board) can be about the same. Alternatively, the predetermined pressure difference required to open the valve outward may be lower than the predetermined pressure required to open the valve inward; I :. In another contemplated embodiment, 'the valve can be used to vent to the outside only when a specific pressure difference is encountered during use,' and will not vent to the inside β. It should be understood here that the vent device M according to the invention The specified structure and dimensions can be changed depending on the expected pressure difference between the inward and outward opening and the subsequent closing force difference. The vent device 24 functions within the package 15 in a manner in which the lid 22 is mounted on a container containing an edible product to be heated and subsequently cooled 18 The beta valve 80 is originally set to project inwardly or concavely as shown in Fig. 9 Shape orientation, in which the sleeve 117 and the blocking member 82 start in an undeformed original molded shape J. When the package 15 is heated, steam may be generated from the edible product, and / or the original gas in the container is heated, so that the interior What pressure increase exceeds the external force = a pressure difference is established across the blocking member 82. In this way, the central portion 141 of the latching structure = 82 is slightly outward toward the package 15 (The structure of the line = connecting sleeve 117 and the edge portion of the latching member assists in allowing the central portion 141 of the latching member to be shaped as follows: within 8 ° Generated-complex stress: Zaiyang part 141 moves outward in the direction of the case, and 2 = force overcomes the force exerted by increasing the internal force on the 80, / 2 the outward setting of the sleeve 117 on the locking member 82 Heart: Secondly, push the finger 86 elastically toward the open position. The pressure of the dagger is further increased (for example, it is greater than the external air pressure)

O: \ 63 \ 63289.PTD Page 19 45 092 1 Five 'Description of the Invention (15) (more than 10 inches of water column) when the' locking member 82 continues to shift outward by the longitudinal extension of the blocking member 82 'and the flap is folded 86 opens to the full position shown in Figure 丨 丨. A moment is applied to the latching member 82 and the diameter of the latching member is two. The shift tends to open the flaps 86. The sleeve 117 assists in effectively defining these opening forces. At least some of the hips such as hot water vapor or steam pass through the opening. The valve 8 is discharged. When the internal pressure of the package 15 decreases, the historical force difference between the internal and external forces of the package 15 also decreases. When the pressure difference drops below a predetermined amount (for example, a pressure difference of less than 10 inches of water puppet), the force developed in the sleeve 117 and the locking member 82 moves the locking member 82 inwardly in an elastic deformation manner as shown in the figure. The original concave orientation shown at 9. This securely closes the valve 80. Γ) The user can then open the lid 22 to remove some or all of the edible items. The lid can be repositioned later on the opening of the container 18 to cover any remaining edible product in the container <. The reclosed package 15 can then be cooled, for example, by being placed in a refrigerator or freezer. As the gas in the package 15 cools, the pressure decreases below the external air pressure. This produces a pressure difference across the valve lock member 82. "Finally, if the pressure difference exceeds a predetermined amount (for example, a 6-inch water column pressure difference), the valve 80 will open inward to allow ventilation into the container 18 to allow the container 18 The pressure difference between the inside and the outside is minimized, and in this way, the cover 22 is prevented from bending or deforming inwardly β 〇 Specifically, as shown in FIG. 12, the locking member 82 starts to shift radially inwardly toward the inside of the package 15. The connection sleeve 117 assists this procedure. The elastic deformation of the blocking member 82 from its original molded shape (Public 9) creates a complex stress in the valve 80. The case tends to elastically resist the inward axial movement of the blocking member 82 (but does not overcome the application of large external pressure) Power on valve 80). These

O: \ 63 \ 63289.PTD Page 20 4 5 0 9 2 1 V. Description of the invention (16) The stress includes a moment applied to the edge portion of the latching member 1 4 0, and this moment tends to direct the flap of the latching member toward The inner open position (Figure 1 2) is elastically pushed as the valve 80 deforms to move to the intake position when the closing pressure 9). Explicit deformation. Valve 80 should be slightly increased when the gas flow is increased. When used, buckling will increase. The pressure generated by the increase of the pressure difference makes a reverse curvature area as shown in FIG. 12 complete. At least part of the pressure difference is due to the force difference of the intake air (for example, less than 6. Indeed, the force developed in the valve 80) The closing motion of the dump is used to relieve the pressure of the vacuum user and stop it until it is added. If the device will be closed, the valve 80 will be opened and closed. The capacity of the valve lid on the container 80 is not reduced, and the locking member 82 is continuously axially shifted inward and the valve edge portion 1 40 is constructed from its original curve. In addition, the valve flap 8 6 is therefore fully open inward. The flap 8 6 is opened in this way because of the torque applied to the valve 80. When the external air is sufficiently lowered, it will reach one inch of water). The valve flap 86 is thus closed (the spring in the figure through the spring from its original molded shape is intended to pull the valve 80 back to its original configuration (inquiry 9) so that the flap 8 6 is quickly and completely closed for rapid loading-breaking as the user is allowed It is generated in the capped container. When the user puts the cap on the container to slightly press down to temporarily increase the pressure in the container. And some internal air or other gas is discharged. When the pressure is pressed, the valve 80 is closed, and the cap is closed. It will go to the approximate original position (because of its elasticity). If it accumulates and reduces the pressure in the container. No matter how large, the valve 80 will not open the intake air inward because it is maintained at a slightly lower pressure and the valve 80 With some air off, the product in this container will be

O: \ 63 \ 63289.PTD Page 21 15 092 1 V. Description of the invention (17) It is not easy to be damaged or deteriorated due to oxidation. It is obvious from the above detailed description and examples of the invention that many variations and modifications can be made without departing from the true spirit and scope of the new concept or principle of the invention.

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Claims (1)

B 092 Ί VI. Patent Application Fangu 1. An air vent device for a closure, the closure has a wall defining (1) an outer surface, (2) —inner surface and (3) — holes in the outer surface and Extending between inner surfaces, the vent device includes: (1) a tubular portion that (a) passes through the hole and forms a seal at the hole between the tubular portion and the wall, and (b) defines a channel Pass through the hole: and (2) a valve configured to span the passage in the tubular portion, the valve including a closing member having at least two penetrating slits, the at least two slits The seam is closed when there is no pressure difference across the closure member 'and there is a gap between the exposure to the external environment of the closure and the gas inside the closure! The pressure difference is poor and the pressure inside the closure exceeds the pressure outside the closure by a predetermined- An amount of j will open the at least two slits. } 2_If the vent device of item 1 of the scope of patent application, it makes the cymbal have a pressure difference between the [locking member exposed to the external environment of the closure and the internal air ridge of the closure | pressure difference and the pressure outside the closure exceeds the closure When the internal pressure reaches a predetermined level, the director will also be open. »3. The venting device according to item 1 of the patent application park, wherein: the blocking member has an outer surface portion out of the surface and is concave when viewed from the outer surface side of the closure nipple; and the blocking member has an inner portion The surface portion is in-plane and is substantially convex when viewed from the inner surface side of the closure wall. 4. The vent device according to item 1 of the patent application scope, wherein the blocking member is recessed into the tubular portion of the vent device. Page 23 4 5 092 1 VI. Patent application scope 5. The vent device according to item 1 of the patent application scope, wherein the valve includes an annular sleeve, and the annular sleeve (1) protrudes from the tubular portion at The channel extends inward, and (2) is joined to the perimeter of the locking member in a unitary structure. 6- The vent device of item 1 of the patent application scope, wherein the blocking member has a pair of penetrating cross slits defining four folds, the four folds are approximately equal in size and when there is no pressure difference across the blocking member Form a closed structure, and deflect to an open structure when the closure member is exposed to a pressure difference between the external environment of the closure and the interior of the closure. "7. For example, the vent hole device of the scope of application for the patent, the order These seed pieces have a reduced cross-section thickness so that the cross-section thickness of these flaps is the largest β′Η in one of the outermost radial portions. Among them, the vent hole. 8. For example, the vent hole in the scope of patent application Device The device is a crushed oxygen resin product. 9. For example, the vent device of the scope of patent application, wherein: (1) one end of the tubular portion terminates in a shoulder to engage the surface; and η is near (") enough to have a flange substantially radially It extends beyond a part of the wall adjacent to the hole to engage the outer surface of the wall. = · As for the vent hole device in the scope of patent application No.1. The opening of the container, wherein the vessel is part of the lid