RU2225337C1 - Bottle safety cap - Google Patents

Abstract

FIELD: capping devices for flasks holding low-viscosity liquids to prevent their refilling in storage or in transit. SUBSTANCE: problem of additional safety level is solved by means of threaded bottle safety cap turned onto external thread of bushing whose ribs are joined with internal bushing thereby organizing passages; it has flexible member with through hole and projections forming annular cavity open on top that accommodates bottom part of internal bushing to form clearance between bottom and flexible member projections; there is metal casing on threaded cap; the latter has pilot check rim over its outline; metal casing is built of two mating parts whose edges are expanded into pilot check rim for opening one of mentioned edges when turning out the cap. EFFECT: enhanced reliability of cap due to using additional level of protection. 1 cl, 3 dwg

Description

 The invention relates to closures for containers with low-viscosity liquids, preventing re-filling of containers during storage and transportation.

Known capping device for bottles, described in the application EP 0670271 A1, IPC ⁶ B 65 D 49/00, publ. 1995, which contains a cylindrical body, at the lower end of which there is a saddle with a through hole, on which the locking element rests. A divider in the form of a ring with ribs adjacent to the inner surface of the housing adjoins the inner space of the housing into passage channels for fluid flow. The device is elastically and hermetically fixed inside the neck of the bottle using elastic annular protrusions that prevent leakage of liquid. Pouring liquid out of the bottle after unscrewing the cork and breaking the warranty whisk is done by tilting the bottle, at which the force of the liquid flow pushes the locking element lying on the saddle with a through hole, opening it and passing the liquid through the passage channels of the divider formed by the spaces between the ribs. When the bottle is returned to its initial vertical position, the locking element returns to its original position by gravity and closes the passage opening, after which it is not possible to refill the bottle with liquid.

 However, the described device has a number of significant drawbacks affecting its functional operation. The locking element, made in the form of a ball, has instability, which dictates the shape of the vertical guides for landing on the saddle, and these guides are so located that the ball is sandwiched between them, and therefore its mobility is limited. As a result of cooling the container, the pressure in the bottle decreases, which can lead to sticking of the closure element and failure to pour out the liquid and which requires a sharp shaking of the container.

 It is also known a closure device containing a sleeve of cylindrical shape, the upper part of which is a screw stopper and has a movable elastic annular protrusion for fixing on the bottle, creating an integral connection. A cap with a warranty whisk is pressed onto the screw plug; a divider is installed on the thread in the form of a ring with ribs dividing the inner space into passage channels for fluid flow. An elastic element is placed in the cavity of the housing for pouring liquid, in the center of which there is a saddle with a through hole, on which a locking element in the form of a valve rests. The elastic element is hermetically fixed inside the neck of the bottle using elastic annular protrusions and is hermetically connected to the housing for pouring liquid, which prevents leakage of liquid. Pouring liquid from the bottle after preliminary rupture of the warranty whisk is carried out by tilting the bottle, at which the force of the liquid flow pushes the locking element lying on the saddle with a through hole, opening it and passing the liquid through the passage channels of the body formed by the spaces between the ribs. When the bottle is returned to its original vertical position, the locking element returns to its original position by gravity and closes the passage hole, after which refilling the bottle with liquid becomes impossible (RU 2150417, CL 65 D 49/02, publ. 2000).

 However, this device has several disadvantages that affect its functional operation. Due to the presence of the movable valve, it can be skewed and jammed, as well as sticking when the temperature is lowered due to the reduced pressure in the tank, which leads to failure of the fluid to flow out and the need to shake the tank to activate the valve.

 The closest technical solution to this invention is a safety cap for a bottle, including a screw cap fixed by thread on the outer sleeve, connected by ribs to the inner sleeve and with the formation of passage channels, an elastic element with a through hole and protrusions forming an annular cavity open at the top with the lower part of the inner sleeve with the formation of a gap between the bottom and the protrusions of the elastic element (RU 2193000, CL 65 D 49/02, publ. 20.11.2002).

 The proposed technical solution is aimed at increasing its reliability through the use of an additional level of protection against refilling the bottle.

 This goal is achieved by the fact that in the safety cap for the bottle, including a screw cap fixed by thread on the outer sleeve connected by ribs to the inner sleeve and with the formation of passage channels, an elastic element with a through hole and protrusions forming an annular cavity open at the top with the lower part of the inner sleeve with the formation of a gap between the bottom and the protrusions of the elastic element, there is a metal casing mounted on a screw cover, with the last ene contour with a control indicator collar, and the metal casing is made of two adjacent parts whose edges are seamed into the control indicator collar, with release one of said edges at unscrewing of the cover.

 The invention is illustrated by drawings, where in FIG. 1 is a schematic sectional view of a safety cap; figure 2 - node a in figure 1, the cover before opening; figure 3 is the same cover after opening.

 The safety cap for the bottle contains a metal casing 1, divided into two parts. The screw cover 2 is made in the lower part along the contour with a control indicator whisk 3, into which the edges of the casing 1 are rolled.

 The cover 2 is fixed by threading to the outer sleeve 4, connected by ribs 5 with the inner sleeve 6 and with the formation of passage channels 7.

 An elastic element 8 is adjacent to the lower part of the inner sleeve 6 with the muffled upper end and has a through hole 9 and protrusions 10 and 11 forming an annular cavity 12 open at the top. The lower part of the inner sleeve 6 is located in the annular cavity 12 to form a gap between the bottom 13, protrusions 10 and 11 of the elastic element 8, which ensures the creation of a water seal.

 The device operates as follows.

 When screwing the screw cap 2, the rolled test indicator beater 3 is released. When the bottle is tilted (not shown), the liquid enters through the through hole 9 into the annular cavity 12 of the hydraulic lock and then flows out of the bottle through the passage channels 7.

 When the bottle is returned to the vertical position, the liquid located in the passage channels 7 enters the annular cavity 12 of the hydraulic lock and then into the bottle, creating excessive pressure that prevents further liquid flow. The pressure created inside the container by a water seal prevents the filling of the container with liquid.

 The safety cap for the bottle, which prevents re-filling of containers, with a water seal, assembled from 4 parts and having several standard heights, fits a wide range of bottle shapes. The control safety whisk and water seal provide a high level of protection against refilling. Bottle capping is performed by pressing from top to bottom by means of a capping machine (not shown).

 All parts of the bottle cap are made of environmentally friendly materials, polyethylene, polystyrene and metal on high-performance injection molding machines on injection molds with a hot runner system and dies.

 A prototype of a hydraulic shut-off valve was made in the pilot-mechanical production of IUPP JSC "BELKEPS" on turning and milling equipment. The outer sleeve is made of polymethylmethacrylate (Plexiglas), the elastic element is made of caprolon, and the casing is made of aluminum sheet.

Claims (1)

A safety cap for a bottle, including a screw cap fixed by thread on the outer sleeve connected by ribs to the inner sleeve to form passage channels, an elastic element with a through hole and protrusions forming an annular cavity open at the top with the lower part of the inner sleeve located in it to form a gap between the bottom and the protrusions of the elastic element, characterized in that it is equipped with a metal casing mounted on a screw cap, the latter being made according to a tour with a control indicator whisk, and the metal casing is made of two contacting parts, the edges of which are rolled into a control indicator whisk with the possibility of releasing one of these edges when the cover is opened.

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