CZ306323B6 - Delivery pipe closure of pasty material container - Google Patents

Abstract

In the present invention, there is disclosed a delivery pipe closure of a container for pasty material, provided with an elastic element wherein the closure is comprised of a body (1) of hard material formed by connecting disk (2) and a cylinder (3) of smaller diameter concentrically coupled therewith. It further comprises a jacket (4) in the form of a hollow cylinder of soft elastic material inserted onto the cylinder (3). One end of the jacket (4) is fastened on annulus of the disk (2) rear side while the other end forms a circular flap (5) clamping the cylinder (3) wherein the face of the disk (2) is connected through a hole (6) with a space extending between the cylinder (3) and the jacket (4).

Description

Cap of the outlet pipe of the pasty material container

Field of technology

The invention relates to a closure intended to close the outlet pipe of a container containing pasty or viscous material, which is metered from the container - tubes, bottles, etc., by pressure. These containers are common especially in the field of cosmetics, food, paints and others.

Prior art

In the case of dispensers for cosmetic creams, food pastes or paints, a certain amount of material remains in the outlet tube after application of the extruded dose, which is exposed to the environment. Oxidation degrades it: cosmetic creams turn rancid, food is attacked by microorganisms, the colors harden and clog the output. It is therefore desirable to provide the outlet of the pressure container with a device which, immediately after the dose has been expelled, separates the material at the outlet from the environment.

EP 0392208 solves this problem in a simple manner, in which a valve for the outlet of a container is described, formed by a circular flap tiltably mounted on the circular mouth of the outlet tube of the container. The flap is connected to a flexible element located in the container. The flap is opened by the pressure of the material and after releasing the pressure it is pulled to the mouth by an elastic element. An obvious disadvantage of this solution is the flap projecting in front of the mouth of the container. It deforms the flow of the emerging material and makes it difficult to apply the material to the treated surface.

The tubular valve for closing the dosing container according to U.S. Pat. No. 3,726,436 has two pairs of flexible flaps in the annular orifice, which are arranged in two layers one above the other, being rotated by 90 [deg.] Relative to one another and overlapping. The flaps in the outer layer have a convex shape and the flaps in the inner layer have a concave shape. By pressing the material contained in the container, the flaps open to form a central cross-shaped opening through which the contents are extruded. When the pressure is released, the flaps close. The clamping of the flaps can be reinforced by resilient rods connecting the flaps to the inner wall of the valve. This closure is relatively complex and difficult to manufacture. In addition, a relatively large space remains between the flaps, filled with material which can stick to the flaps over time and thus jeopardize the function of the device.

The closure described in CZ PV 2001-2022 consists of a cup-shaped membrane made of flexible flexible material anchored around the circumference in the circular mouth of the dosing container. The membrane is cut crosswise in the middle, which creates flaps which, when the membrane is pushed out, open with pressure in the dosing container and close again when the pressure is released. This solution places considerable demands on the membrane material. The flexible flaps abut a relatively large area to seal at all. It soon adheres to and solidifies the released material and deprives the closure of its functionality.

The subject of WO 9906296 is a dosing valve formed by a cup-shaped flexible membrane in the circular mouth of a container. The membrane, which again places considerable demands on the material, has an opening in the middle through which it rests on a fixed sealing pin in the closed position. The pressure inside the container bulges the membrane and the contents of the container flow out through the released opening. This solution does not allow accurate dosing, because during a relatively large stroke of the membrane, the space above the membrane is connected by an opening to the external environment and the user does not influence the flow rate during the return movement of the membrane.

U.S. Pat. No. 4,166,553 describes a wall-mounted dispenser of pasty material having a cylindrical hollow teat of flexible material at the bottom, partially surrounded by a solid support. After installation on the wall, the user cuts the teat at the bottom and pushes the material out by pressing on the uncovered wall. This simple solution does not completely ensure sealing and does not prevent dripping of the dispenser cartridge.

-1 CZ 306323 B6

Said known dosing closure solutions require a corresponding design solution in the mouths of the containers on which they are to be applied.

The object of the invention is to provide a simple and effective closure for the outlet of a pressure container, which would substantially reduce the described disadvantages of the known solutions and at the same time be applicable to each cylindrical mouth of the container.

The essence of the invention

This task is solved by the closure of the outlet pipe of a pasty material container provided with a resilient element. The essence of the closure lies in the fact that it consists of a body of hard material formed by a connecting disk and a concentrically connected cylinder of smaller diameter and further consists of a hollow cylinder-shaped casing of soft flexible material threaded on the cylinder, one end of the casing being fixed to the rear ring. the sides of the disc and the other end form a circular flap gripping the cylinder around the circumference, and wherein the front of the disc is connected by an opening to the space between the cylinder and the casing.

To fasten the closure in the plastic outlet tube of the container, the disc is preferably tapered on the circumference.

Explanation of the drawing

The invention will be further elucidated by means of a drawing in which an embodiment of the closure is preferred, namely in Fig. 1 in front view, in Fig. 2 in section AA according to Fig. 1, in Fig. 3 in section BB according to Fig. 1 and in Figs. 4 and 5 in two different axonometric views.

Examples of embodiments of the invention

The cap is intended to be inserted into the outlet plastic tube of the container. It consists of two elements: A body 1 made of a hard material, e.g. polypropylene, which is formed by a connecting disk 2 and a concentric cylinder 3 of smaller diameter connected to it. Furthermore, the closure consists of a housing 4 in the form of a hollow cylinder of soft resilient material which is threaded on the cylinder 3. One end of the housing 4 is fastened to the intermediate ring of the rear of the disc 2 and the other end forms a circular flap 5 gripping the cylinder 3 around the circumference. The front of the disc 2 is connected by an opening 6 to the space between the cylinder 3 and the casing 4. A sharp edge is formed by the conical chamfering of the circumference of the disc 2, by which the closure snaps into the plastic outlet tube of the container.

The material compressed in the container penetrates through the opening 6 in the disc 2 into the space between the cylinder 3 and the casing 4, deviates by its pressure around the circumference of the cylinder 3 the flap 5 from the cylinder 3 and flows out below the formed slit. After releasing the pressure, the flap 5 is closed again and airtightly insulates the closure filling from the environment.

Claims (2)

A closure for an outlet tube of a pasty material container provided with a resilient element, characterized in that it consists of a body (1) of hard material formed by a connecting disc (2) and a cylinder (3) of smaller diameter concentrically connected thereto and further consisting of a shell ( 4) in the form of a hollow cylinder of soft resilient material threaded on the cylinder (3), one end of the casing (4) being fixed to the intermediate ring of the rear side of the disc (2) and the other end forming a circular flap (5) gripping the cylinder (3) and wherein the face of the disc (2) is connected by an opening (6) to the space between the cylinder (3) and the housing (4). Closure according to Claim 1, characterized in that the disc (2) is tapered at the circumference.