Soda bottle cap

Details Soda bottle cap Soda bottle cap

1997-08-01

1999-04-20

Huson, Gregory L

Dispensing

Resilient wall

With flow controllers or closures

222394, 2224643, B65D 3700

Patent

active

058949623

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
This invention relates to soda bottle cap of simple structure that enables discharge of liquid from a soda bottle while keeping high pressure gas inside to maintain the carbonated taste of liquid until it is consumed.
2. Background
Because the commonly used cap for soda bottle that contains carbonated liquid, such as cola, cider, and beer, is simply made of shell (1) and seal (2) as is shown in FIG. 1, the cap should be removed from the bottle (3) before the liquid can be poured from the bottle. As soon as the cap is opened, the high pressure CO.sub.2 gas inside the bottle is released from the bottle. When the cap is closed after use, the space above the carbonated liquid is slowly pressured again by the CO.sub.2 released from the carbonated liquid inside the bottle. When the cap is opened again to pour out the liquid from the bottle, the high pressure CO.sub.2 gas is lost again as this opening and closing of the cap is repeated, the CO.sub.2 gas that is dissolved in the carbonated liquid is lost repeatedly, the carbonated taste of carbonated liquid becomes weak, and the liquid turns stale and flat.
To avoid such problems the soda bottle cap of this invention enables release of liquid from a soda bottle while keeping high pressure up. The soda bottle cap of this invention can be manufactured easily for lost cost as it has simple structure and, therefore, can be used widely on soda bottles for general consumers.


SUMMARY OF THE INVENTION

The basic structure of soda bottle cap of this invention consists of a shell that has a spout and a flexible top, and a seal that has an opening through which liquid can flow out when the flexible top is pressed down. The detailed description of the invention is presented referring to figures as follows.


BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a common soda bottle cap. It is simply made of a shell and a seal, and is placed on a soda bottle.
FIG. 2 is an illustration of a first embodiment of the present invention disclosing the shell of the soda bottle cap which has an inner hole (6) which connects to a spout (4), through which liquid can flow out, a flexible top (7) that can be pressed down, and a protective shoulder (8) around the flexible top that keeps the flexible top from being pressed down accidentally during handling.
FIG. 3 illustrates a part of the seal that is cut away so that the structure of the seal can be better apprehended. The top of the seal has channels (10) through which liquid can flow. The seal also has a center hole (9) and a tube holder (11) that can hold a tube.
FIG. 4 shows the shell and the seal, placed on a soda bottle. Though the spout (4) is open, as the end of it is broken along notch (5), the liquid can not be discharged from the bottle because the seal is pressed tightly against the inner hole (6) of the shell due to the high pressure of CO.sub.2 gas in the bottle.
FIG. 5 illustrates the shape change of the soda bottle cap of FIG. 4, when the flexible top (7) of the shell is pressed down. As the seal does not block the inner hole (6) of the shell any more, the liquid in the soda bottle can be pushed out by the high internal pressure of the bottle.
FIG. 6 illustrates another embodiment of the shell of the soda bottle cap of the present invention in which it has a wider inner hole (13) and a ridge (14) around the wider inner hole. Also the spout of this shell has a spout cap at the end, and a thread near the notch (5).
FIG. 7 illustrates another embodiment of the spout in which has a triangular inner hole (15).
FIG. 8 illustrates another embodiment of the seal that has ribs (16) where a part of the seal is cut away so that the structure of the seal can be better apprehended. Due to the ribs (16) the seal can return to the original state more readily when force on the flexible top (7) is released.
FIG. 9 illustrates another embodiment of the soda bottle cap of the present invention. The plug type seal (19) has a plug hole (21) in the center and the shell has a plug type flexible top (17

REFERENCES:
patent: 3563413 (1971-02-01), Gordon
patent: 3595445 (1971-07-01), Buford

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