FR2502721A1 - Sleeve seal for fitting in neck of bottle - has cylindrical sleeve with open top hat cross section giving one plane and two cylindrical sealing faces - Google Patents

Abstract

The annular seal prevents the rotation of a fitting (1) such as a dispenser mounted on and in the neck (2) of a container. It uses one plane (3) and cylindrical sealing faces (7,5), the first abutting the free neck edge (4), the second abutting the outer surface (8) of thefitting within the neck, and the last abutting the internal neck surface (6). The first face is pressed against the free edge by a collar (9) securing the fitting. The seal may take the form of a cylindrical sleeve with open ends, using walls of a 'U' section in radial planes to provide the two cylindrical sealing surfaces. An external radial flange may extend from the top of the outer leg of the 'U' to form the plane sealing face, the tip being bevelled (10) whilst the inside is stepped.

Description

Rotating seal and immobilizer for fixing an accessory on and through a container neck
The present invention relates to the closure of containers comprising a neck on which an accessory protruding outside is inserted and penetrating inside the container.

 For many common applications, it is necessary to fix on a container, such as a bottle, an accessory such as a pump or a sprayer, serving to take a product inside the container and to distribute it outside.

 The fixing of such an accessory is generally carried out by a ring comprising a thread which comes into engagement with a corresponding thread of the neck of the container.

 For certain products, such as oils or other lubricants, untimely loosening of the ring commonly occurs, either during use, due to vibrations and alternating forces exerted during pumping, for example, or even during storage. due to variations in ambient temperature.

 The invention aims to overcome such difficulties.

 The invention relates to an annular seal for sealing and immobilizing in rotation for fixing an accessory on and through a container neck. This seal has a first flat, sealed support face on the free edge of the neck, a second sealed, cylindrical support face on the external wall of the accessory inside the neck, the first face being applied under stress. on the edge of the neck by means of fixing the accessory to the neck.

 In a particularly advantageous embodiment, the annular seal has an open semi-toric shape of axial U-shaped section whose vertical branches constitute the second and third sealing, cylindrical bearing faces, the free end of the vertical branch outside of the U extending radially by an annular flange constituting the first plane sealed support face between the neck and the accessory.

 To facilitate the positioning of the seal in the neck, it is preferable for the second sealed support face to be extended by a conical portion which is constricted opposite the first sealed support face.

 More particularly, in the case of application of the seal according to the invention to the mounting of a pump which requires free access to a vent communicating with the interior of the bottle, it is advantageous that the third sealed bearing face has a smaller diameter offset in the part opposite to the first sealed support face.

 The invention will be better understood on reading the detailed description which follows and on examining the appended drawing which represents, by way of nonlimiting example, an embodiment of the invention.

 The single figure shows, in axial section, a seal according to the invention used for mounting a pump on the neck of a container.

 The seal 12 shown in the drawings has an open semi-toric shape of axial U-shaped section having two vertical branches 5 and 7, and an external radial extension-3 in the form of an annular flange. The vertical branch 7 is applied elastically and seals against the wall 8 of a pump body 1, while the branch 5 is applied elastically and seals against the internal wall 6 of the neck of a container 2.

 The annular flange 3 is applied against the edge 4 of the neck 2 by a shoulder 13 of the pump 1 under the action of an annular plug 9 screwed onto the neck 2.

 The collar 3 conventionally has concentric beads 14 which are crushed against the edge 4 of the neck under the effect of the pressure exerted by the screwing.

The lower part of the branch 5 of the seal 12 tapers conically at 10, which facilitates its insertion into the neck 2. The branch 7 of the seal 12 has dan. its lower part has a cylindrical recess 11 which ensures constant release of a vent 15 allowing the bottle to be vented. Such a seal 12 can advantageously be produced by molding plastic material. - '
For some applications, it may be advantageous for the external diameter of the branch 5 of the seal to be slightly greater than that of the inside of the neck. a new container, the seal will remain in the used container, and we will use a new container with a new seal q, which will protect the temporary cap of the latter container during storage.

 A particularly interesting application of such a seal is the sealing of packages of edible oils, in particular for barbecues, or of penetrating products, or crack detectors, distributed using a pump.

 The seal according to the invention, which provides three distinct seals on the edge of the neck 4 on the external wall of the accessory 8 and on the internal wall 6- of the neck, prevents the oily products from migrating by capillarity towards the outside, and, therefore, avoids the contamination of the thread which allows unscrewing.

 The invention thus makes it possible to obtain a total seal which avoids unscrewing following vibrations or alternating forces, unlike conventional sealing plugs which seek to obtain an equivalent result by the mechanical immobilization of mobile elements l 'one over the other.

 In addition, the U-shaped section of the joint according to the invention makes it possible to absorb the variations in dimensional dimensions of the containers (more particularly plastic or glass) of the thread heights and of the pumps or other accessories mounted on and through the neck of the container.

 This result is obtained within wide dimension limits, while retaining the triple sealing effect, facial on the neck, diametral around the pump and diametral in the container.

 Of course, the invention is in no way limited to the embodiments described and shown, it is capable of numerous variants accessible to those skilled in the art, depending on the applications envisaged and without departing from the scope of the invention. 'invention.

Claims (4)

 1. Annular seal for sealing and immobilizing in rotation for the fixing of an accessory 1 on and through a neck 2 of the container, characterized in that it comprises a first plane watertight bearing face 3 on the edge free 4 of the neck, a second cylindrical sealed bearing face 5 on the inner wall 6 of said neck 2, and a third cylindrical sealed bearing face 7 on the external wall 8 of the accessory 1 inside the neck 2 , the first face 3 being applied under stress to the edge 4 of the neck 2 by means of fixing 9 of the accessory 1 on the neck 2.  2. Joint according to claim 1, characterized in that the annular seal has an open semi-toric shape of axial section in the shape of a U, the vertical branches 5, 7 of which constitute the second and third sealed, cylindrical bearing faces, the free end of the outer vertical branch of the U 5 extending radially by an annular flange 3 constituting the first plane sealed support face between the neck 2 and the accessory 1.  3. Joint according to claim 1 or 2, characterized in that the second sealed support face 5 is extended by a conical part 10 constricted opposite the first sealed support face 3.  4. Joint according to one of claims 1 to 3, characterized in that the third sealed support face 7 has a recess of smaller diameter ll in the part opposite to the first sealed support face 3.