CN203780992U - Bottle cap for container - Google Patents

Abstract

A bottle cap for a container is used for covering the neck of the container and comprises a top plate, a side wall, an inner seal ring and an outer seal ring. The top plate is provided with a top surface and a bottom surface. The side wall protrudes out of the periphery of the bottom surface of the top plate and is provided with an opening end. The neck is contained through the opening end. The inner seal ring extends downward from the bottom surface of the top plate. The outer seal ring extends downward from the bottom surface of the top plate and concentrically surrounds the inner seal ring. An undercut surrounding an inner pin of the inner seal ring is further formed in the bottom surface of the top plate so that a first thickness can be formed. The top surface and the bottom surface form a second thickness between the inner seal ring and the outer seal ring. The second thickness is larger than the first thickness.

Description

container cap

technical field

The present disclosure relates generally to bottle caps, and more particularly, to bottle caps for containers having screw necks. the

Background technique

Bottle caps are used to keep liquids in containers with screw necks. However, storing carbon dioxide-enriched liquids or beverages in containers can cause considerable stress on both the container (eg, bottle) or the cap. To solve this problem, many bottle caps have been proposed which have good sealing properties, but are not good enough in many respects. the

Utility model content

A main purpose of the present disclosure is to design a new bottle cap with better sealing properties. the

A bottle cap for covering the neck of a container is disclosed. The bottle cap includes a top plate, a side wall, an inner sealing ring and an outer sealing ring. The top plate has a top surface and a bottom surface. The side wall protrudes from the periphery of the bottom surface of the top plate and has an open end through which the neck is accommodated. An inner seal ring extends downward from the bottom surface of the top plate; an outer seal ring extends downward from the bottom surface of the top plate and concentrically surrounds the inner seal ring. The top plate also has an undercut on the bottom surface surrounding the inner foot of the inner seal ring to form a first thickness, between the inner and outer seal rings the top and bottom surfaces form a second thickness , and the second thickness is greater than the first thickness. the

In another embodiment, the bottle cap further includes a detachable annular band connected to the open end of the annular sidewall via a plurality of bridges. the

In another embodiment, the bridges connecting said detachable annular band and said annular side wall are small ribs formed of material which is destroyed when the cap is first removed from the neck of the container. the

In another embodiment, the inner face of the endless belt has a set of annularly spaced cams. the

In another embodiment, said cams are connected by narrow conical rings. the

In another embodiment, the bottle cap further includes a plurality of radial stops protruding from the bottom surface of the top plate between the inner and outer sealing rings. the

In another embodiment, the inner sealing ring of the bottle cap has a height in the range of 3 to 4.5 mm. the

In another embodiment, the outer sealing ring of the bottle cap has a height in the range of 0.8 to 1.8 mm. the

In another embodiment, the first thickness of the bottle cap, eg the thickness of the top plate having an undercut, is in the range of 0.75 to 1.15 mm. the

In another embodiment, the second thickness of the cap, such as the normal thickness of the top plate, is in the range of 1 to 1.5 mm. the

In another embodiment, each barrier of the bottle cap has a height in the range of 0.2 to 0.6 mm. the

In another embodiment, each barrier of the bottle cap has a width in the range of 1.3 to 1.8 mm. the

Description of drawings

The following detailed description of the preferred embodiments of the present disclosure will be easier to understand with reference to the accompanying drawings. The present disclosure is described by way of example and not limited by the accompanying drawings, in which like reference numerals indicate like elements. the

Figure 1 is an overall view of a bottle cap according to an exemplary embodiment of the present disclosure;

Figure 2 is an axial sectional view of a bottle cap according to an exemplary embodiment of the present disclosure;

Figure 3 is an axial sectional view of a bottle cap and a threaded neck joined together according to an exemplary embodiment of the present disclosure;

Fig. 4 shows the internal structure of the bottle cap according to an exemplary embodiment of the present disclosure;

Figure 5 is an enlarged cross-sectional view of a portion of a bottle cap according to an exemplary embodiment of the present disclosure;

FIG. 6 is an enlarged cross-sectional view of a stopper of a bottle cap according to an exemplary embodiment of the present disclosure. the

Detailed ways

The detailed description of the drawings is intended as a description of presently preferred embodiments of the disclosure and is not intended to represent the only forms in which the disclosure can be embodied. It is to be understood that the same or equivalent function may be accomplished by different embodiments, which are intended to be encompassed within the spirit and scope of the present disclosure. the

FIG. 1 is an overall view of a bottle cap according to an exemplary embodiment of the present disclosure. As shown, the bottle cap 10 is used to cover the neck 40 at the entrance of a container, such as a beverage bottle (see FIG. 3 ). The bottle cap 10 may be made of a thermoplastic material such as polyethylene or polypropylene. The bottle cap 10 includes a top plate 11 and a side wall 12 . The side wall 12 protrudes from the bottom of the top plate 11 . The side wall 12 has an open end and receives therethrough the neck 40 of the container. The bottle cap 10 has, but is not limited to, a tubular shape which in use surrounds a neck 40 (see Figure 3). The detachable annular band 14 is connected to the open end of the side wall 12 via a plurality of bridges 143 , shown in more detail in FIG. 2 . The detachable annular band 14 is also called "anti-theft band" or "tamper-evident band" because it will be caught by the neck 40 and disengaged from the side wall 12 when the bottle cap 10 is removed from the neck 40 for the first time, thereby providing tamper-evident features. or a visual indication of fraud. The embossed raised pattern 13 is formed on the ring-shaped periphery of the side wall 12, thereby enhancing the friction force of the ring-shaped periphery, making the bottle cap 10 easier to unscrew or screw on. the

FIG. 2 is an axial cross-sectional view of a bottle cap 20 according to an exemplary embodiment of the present disclosure. FIG. 3 is an axial cross-section of a bottle cap 20 joined together with a threaded neck 40 according to an exemplary embodiment of the present disclosure. Referring to FIG. 2, a section of the bottle cap 20 reveals its internal structure, including a sealing structure configured to cooperate with corresponding features of the neck 40 shown in FIG. 3 in use. The bottle cap 40 typically has an opening at one end and extends at the other end for sealingly attaching to a container, such as a beverage bottle. As shown in FIG. 2 , the top plate 11 has a top surface and a bottom surface, and an annular side wall 12 protrudes from the periphery of the top plate 11 at one end. The thread 121 is disposed on the inner annular surface of the side wall 12 . The thread 121 cooperates in use with the external thread 41 provided on the outer surface of the annular neck 40 . Referring to FIG. 2, it will be appreciated that the thread 121 includes a notch over the length of its helix, which defines a vent "V" for balancing the container when the bottle cap 20 is initially removed from the neck 40. the pressure of the contents. An inner seal ring 111 and an outer seal ring 112 protrude downward from the bottom surface of the top plate 11 , wherein the outer seal ring 112 surrounds the inner seal ring 111 concentrically. The inner seal ring 111 and the outer seal ring 112 define therebetween a seal chamber "S" in which the annular opening portion of the neck 40 is sealingly received (see FIG. 3 ). Both the inner sealing ring 111 and the outer sealing ring 112 have an annular configuration allowing them to elastically deform and/or adapt to corresponding sealing structures on the neck 40 . As can be appreciated with reference to FIG. 3 , the outwardly facing annular bulge 111 a on the inner seal ring 111 is configured to sealingly contact the inner sealing surface of the neck 40 . Similarly, the inner surface of outer seal ring 112 is configured to sealingly contact the outer sealing surface of neck 40 . the

Referring back to FIG. 2, the bottle cap 20 also includes a plurality of radial stoppers 24, which also protrude from the bottom surface of the top plate 11 between the inner seal ring 111 and the outer seal ring 112, and combine the inner seal ring 111 to the outer seal ring 112. The shape and arrangement of the radial stoppers 24 are shown in FIGS. 4 and 6 . The radial stop 24 controls the height at which the cap 20 is screwed onto the neck 40 . The above should be understood with reference to FIG. 3 , which shows one of the radial stops 24 contacting the top surface of the annular neck 40 . Each radial stopper 24 protrudes slightly from the bottom surface of the sealed chamber "S". Without the stopper 24 , the neck 40 would easily continue to protrude into the seal chamber "S" by about the stopper's height, and the outer seal ring 112 would be forced to expand even more so as to fit more firmly and tightly against the opening of the neck 40 . Furthermore, the bottle cap 20 requires less opening torque due to the reduced contact area between the bottle cap 20 and the neck 40 in the area of the stopper 24 . the

From FIG. 2 , it should also be understood that the tamper evident strip 14 is connected to the open end of the side wall 12 via a plurality of bridges 143 . The bridges 143 are small ribs of material that are destroyed when the cap 20 is first removed from the neck 40 . The inner surface of the tamper-evident band 14 has a set of annularly spaced cams 142 connected by a narrow tapered ring (shallow taper ring) 141 . When the bottle cap 20 is first installed on the neck 40, the cam 142 and the sloped bottom surface of the conical ring 141 are pushed over the outwardly protruding flange band 42 on the neck 40 (FIG. 3). Thereafter, complementary locking surfaces on opposite sides of the cam 142 and flange band 42 help lock the tamper evident band 14 to the neck 40 . The narrow tapered ring 141 makes the tamper-evident band 14 stronger and thus more securely retained on the neck 40 of the container. More specifically, when the bottle cap 20 is mounted on the neck 40, the conical ring 141 contacts the flange band 42 of the bottle (ie, the anti-theft ring), thereby applying a preload thereto. This preload improves the performance of the bottle cap 20 during opening by ensuring proper bridge breakage, reducing hinge bands (i.e., one or more bridges are not broken), and reduces movement without breaking the bridges. In addition to the possibility of tamper-evident tape. the

It should be understood that the neck 40 is less prone to deformation than the inner seal ring 111 and the outer seal ring 112 . When the bottle cap 20 is disengaged from the neck 40 (that is, before the bottle cap 20 is installed on the neck 40 for the first time), the inner sealing ring 111 has the largest outer diameter at the annular bulge 111a and the smallest outer diameter near the top plate 11 . The inner diameter of the neck 40 is generally uniform, slightly smaller than the largest outer diameter of the inner sealing ring 111 in the disengaged state, and slightly larger than or equal to the smallest outer diameter of the inner sealing ring 111 in the disengaged state. When the opening of the neck 40 extends into the chamber "S", the inner sealing ring 111 will be forced to deform radially inwardly, that is, generally along the direction indicated by the arrow "R", so that the annular bulge 111a is in recovery. The inner wall of the neck 40 is pushed under force, thereby sealing the container. As neck 40 extends further into chamber "S", the opening of neck 40 will contact outer seal ring 112 and force it to deform radially outward, so that outer seal ring 112 pushes against the outer wall of neck 40 under restoring force, thereby Seal the container more tightly. the

As shown in FIG. 3 , pressure generated within the container by, for example, a carbonated beverage may act on top plate 11 causing it to deform (eg, dome) upward generally in the direction indicated by arrow "U". Such deformation of the top plate 11 may exert a rotational force in direction “R” on the inner seal ring 111 out of sealing contact with the inner sealing surface of the annular neck 40 . To solve this problem, referring to FIGS. 3 and 5 , it is more advantageous to have an inner foot undercut 19 surrounding the inner sealing ring 111 on the bottom surface of the top plate 11 . As shown, the undercut 19 provides more flexibility to the top plate 11 in the region of the inner seal ring 111, which acts as a hinge, decoupling to some extent between the deformation of the top plate 11 and the deformation of the inner seal ring 111 movement, thereby allowing the inner sealing ring 111 to continue to maintain sealing contact with the neck 40 . the

FIG. 4 shows the internal structure of a bottle cap according to an exemplary embodiment of the present disclosure. As shown in the figure, a total of eight radial barriers 24 are evenly distributed between the inner sealing ring 111 and the outer sealing ring 112 . the

5 is an enlarged cross-sectional view of a portion of a bottle cap according to an exemplary embodiment of the present disclosure. As shown in FIG. 5 and referring to FIGS. 2 and 4, the annular undercut 19 has a curved portion with a radius of curvature _R3 in the range of 0.5 to 0.9 mm. The bottle cap 20 has a curved portion at the corners of the top plate 11 and the side wall 12, and the radius of curvature R ₁ thereof is in the range of 0.3 to 0.7 mm. The outer seal ring 112 has a height d ₁ which is in the range of 0.8 to 1.8 mm. The barrier 24 has a height d ₃ in the range of 0.2 to 0.6 mm and a length d ₄ in the range of 1.3 to 1.8 mm. The normal thickness _d2 of the top plate 11 is in the range of 1 to 1.5 mm. The inner sealing ring 111 has a height d ₅ in the range of 4.9 to 5.1 mm. The outward bulge 111a on the inner seal ring 111 has a curved portion with a radius of curvature _R2 in the range of 0.3 to 0.8 mm. The top plate 11 has a thickness d ₆ in the range of 0.75 to 1.15 mm at the undercut portion.

FIG. 6 is an enlarged cross-sectional view of a stopper of a bottle cap according to an exemplary embodiment of the present disclosure. As shown, the barrier 24 has a trapezoidal cross-section, the top surface of the barrier 24 has a width _d7 in the range of 0.8 to 2 mm, and the bottom surface of the barrier 24 has a width _d8 in the range of 1.0 to 2.8 mm.

However, it is not necessary to adhere to the exact dimensions shown in the figures. The beneficial effect of the sealing joint according to the present disclosure is based on the structural design in the present disclosure, and is not sensitive to reasonable manufacturing tolerances of the actual bottle cap and the neck of the container. the

Although various embodiments of the disclosure have been illustrated and described, the disclosure is not limited to these embodiments. The ordinal numerals such as "first" and "second" appearing in the claims are only used for distinction, and do not imply any specific sequence or connection relationship between corresponding components. The technical features appearing only in certain claims or embodiments does not mean that they cannot be combined with other features in other claims or embodiments to achieve beneficial new technical solutions. Many modifications, changes, variations, substitutions and equivalents will be apparent to those skilled in the art without departing from the spirit and scope of this disclosure as described in the claims. the

Claims (12)

1. a bottle cap of a container, the bottle cap is used to cover the neck of the container, it is characterized in that, the bottle cap comprises: a top panel having a top surface and a bottom surface; a side wall protruding from the periphery of the bottom surface of the top plate and having an open end through which the neck is received; an inner seal ring extending downwardly from the bottom surface of the top plate; and an outer seal ring extending downwardly from the bottom surface of the top plate and concentrically surrounding the inner seal ring; Wherein, the top plate also has an undercut on the bottom surface surrounding the inner foot of the inner seal ring to form a first thickness, between the inner seal ring and the outer seal ring, the top surface and the bottom surface A second thickness is formed, and the second thickness is greater than the first thickness. the 2. The closure for a container of claim 1, further comprising an annular band connected to the open end of the side wall via a plurality of bridges. the 3. A cap for a container as claimed in claim 2, wherein said bridges are small ribs of material which is destroyed when said cap is first removed from the neck of said container . the 4. A bottle cap for a container as claimed in claim 2, wherein the inner surface of the annular band has a set of annularly spaced cams. the 5. A bottle cap for a container as claimed in claim 4, wherein said cams are connected by narrow conical rings. the 6. The bottle cap for a container according to claim 1, further comprising a plurality of radial stoppers protruding from the bottom surface of the top plate between the inner sealing ring and the outer sealing ring. the 7. The bottle cap for a container according to claim 1, wherein the inner sealing ring has a height in the range of 3 to 4.5 mm. the 8. The closure for a container according to claim 1, wherein the outer sealing ring has a height in the range of 0.8 to 1.8 mm. the 9. The bottle cap for a container according to claim 1, wherein the first thickness is in the range of 0.75 to 1.15 mm. the 10. The bottle cap for a container according to claim 1, wherein the second thickness is in the range of 1 to 1.5 mm. the 11. The bottle cap for a container according to claim 6, wherein each of said barriers has a height in the range of 0.2 to 0.6 mm. the 12. The bottle cap for a container according to claim 6, wherein each barrier has a width in the range of 1.3 to 1.8 mm. the