FR2669300A3 - Bottle made by a blowing process - Google Patents

Abstract

A bottle made by a blowing process, from synthetic material, comprising a bottle body (1) and a neck (2), characterised in that a bellows (4) connected directly with the internal space (6) is formed directly on the neck (2), the upper end of this bellows (4) being closed, for example, by welding.

Description

 In the case of bottles or similar containers made of synthetic material which are not filled immediately after their manufacture, it is often necessary to provide for a more or less long storage time. During this, so that the interior space of the bottle produced by blowing remains protected, it is generally produced with a so-called lost head, which is closed at its upper end, almost always by welding. The storage of such bottles, between manufacture and the filling operation, often leads to their deformation. Thus, for example, in the case of a closed bottle which is not yet completely cooled and which leaves a blowing machine, the air inside it heats up and relaxes the body of the bottle which Conversely, in winter, bottles stored outside in shelters can retract and thus also undergo permanent deformation.

 It must be taken into account that, on the one hand, complete slow cooling of the blown bottles after their manufacture is complicated, and that, on the other hand, we always try to produce the bottles with the thinnest possible wall, precisely in the case of a high quality filling material, due to the relatively expensive synthetic material which must then be used, and most of the time only the stability factor is taken into account with regard to the thickness of the wall .

 The present invention therefore has the object of creating a bottle which can be produced by a blowing process, and which is closed before the filling operation, which is not liable to deform.

regardless of possible expansion or possible removal of trapped air. This object is achieved according to the invention by the means indicated in the claim.

 The invention is represented in the drawing by a semi-section through an upper part of the bottle.

1 generally designates the bottle body, the neck 2 of which can end, for example, as shown, by a crown cap lip, but which can, of course, also be provided with a thread for a cap. closure or which can be configured for a closure cap.

 According to the invention, a bellows 4 produced in one piece at the same time with the rest of the body during the blowing of a blank, follows the neck upwards, bellows which is closed at its upper end, for example by a tongue solder 5.

 The air expanding in the interior space 6 as a result of heating, for example a heating resulting from the residual heat in the synthetic material after manufacture or due to the hot air in summer, then rises through the neck 2 in the bellows 4 and lengthen it in the direction of the arrow, that is to say it will deform the latter and not the bottle body, and likewise, the air retracted under the action cold will deform the bellows in the opposite direction by shortening it, and thus prevent a corresponding deformation of the bottle body.

 The bellows 4, before filling, can be removed by separation along the line 7.

 It is less expensive to make a bellows than to give the bottle sufficient thickness so that it resists deformations which may occur under the action of heat or cold.

Claims (1)

 CLAIM  A bottle produced by a blowing process, made of synthetic material, comprising a bottle body (1) and a neck (2), characterized in that a bellows (4) in direct connection with the interior space (6) is formed directly on the neck (2), bellows (4) whose upper end is closed, for example, by welding.