Pouch for a pressurized bottle

Abstract

The invention relates to a pouch (1) for a pressurized bottle, made up of a tubular wall (2) closed in its upper part (22) by a welded seam into which a valve (4) is incorporated. According to the invention, the tubular wall (2) is obtained by overlapping and welding together the two lateral edges of a strip, and the tubular wall (2) is closed in its lower part (21) by an essentially round bottom wall (3). Thus, the tubular wall (2) of the pouch will have a practically circular cross section in a large lower part, this cross section tending towards an elliptical shape as it nears the upper end (22) where it becomes completely flat. The pouch (1) will, at least in a major lower part, occupy practically all the space in the bottle, considerably reducing the dead space in that part.

Description

technical field

[0001]

[01] The invention relates to a bag for pressurized bottles according to the preamble of the main claim. Background technique

[0002]

[02] Such pouches are commonly used in sprayers of the cosmetic and food as well as technical product category. The bag allows to separate the product to be administered from the propellant gas contained in the bottle.

[0003]

[03] The bag usually consists of two walls welded together by four welds, a valve being placed in the upper weld to allow extraction of the contents of the bag.

[0004]

[04] Once the bag is filled, the bag thus has an oval or elliptical cross-section. The two side welds each form a raised edge which makes it necessary to increase the size of the bottle to make room for it. Likewise, the bottom of the bag is flat and sets away from the bottle wall in a noticeable manner. In other words, the dead space inside the bottle caused by the bag geometry is not negligible.

[0005]

[05] The known doc...

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