JP2010519144A - Pouch for pressurized bottle - Google Patents

Abstract

The present invention relates to a pressurized bottle pouch (1) formed by a cylindrical wall (2) in which an upper part (22) is closed by a joining part and a valve (4) is incorporated therein.
According to the invention, the cylindrical wall (2) is obtained by superimposing the two side edges of the tape and soldering, the cylindrical wall (2) being a bottom wall which is substantially circular at its lower part. Closed by. Therefore, the cylindrical wall (2) of the pouch has an almost circular cross section at the large lower part, which tends to be elliptical as it approaches the upper end (22), and is completely flat at the upper end. become. The pouch (1) will occupy the bottle space completely, at least in the large part below, making the dead space in this part quite small.
[Selection] Figure 7

Description

  The present invention relates to a pressurized bottle pouch described in the claims.

  Such pouches are usually used for spraying cosmetics, foods and technical products. Thereby, the product to be applied can be separated from the propellant gas contained in the bottle.

  These pouches are generally composed of two walls joined together by four solderings, and a valve is incorporated into the upper joint, thereby allowing the contents of the pouch to be removed.

  Thus, when filled, these pouches exhibit an oval or elliptical cross section. The joint portions of the two side surfaces each form a protruding edge, and the size of the pouch needs to be increased in order to leave those places. Similarly, the bottom of the pouch is also flattened and clearly away from the bottle wall. In other words, the dead space inside the bottle derived from the shape of the pouch is a size that cannot be ignored.

Patent Document 1 discloses a non-pressurized bottle pouch formed by rotating a composite film having a cylindrical central portion and having opposite side surfaces bonded together.
The pouch is closed by a thick plate whose bottom is joined by soldering. The upper part of the pouch is soldered to an annular flange on which the pump device can be stopped with a ratchet mechanism. When the product is removed, negative pressure is generated in the pouch and the pouch shrinks. However, the bottom plate, due to its rigidity, prevents the pouch from fully contracting. Moreover, because of this thick bottom plate and also because of the upper flange, the pouch cannot be wrapped on itself along its longitudinal axis, for example in a bottle with a smaller introduction neck. Cannot be easily installed, and the storage capacity cannot be reduced before assembly.

French Patent No. 2853633 A1

  The object of the present invention is to reduce on the one hand the number of soldering required to manufacture the pouch and, on the other hand, wrap the pouch on itself so that it can be easily introduced into the bottle. It is to reduce the dead space inside the bottle and increase the filling rate while maintaining sufficient flexibility that can be applied.

  According to the invention, this object is achieved because the cylindrical wall is obtained by superimposing and soldering the two side edges of the tape. As such, the cylindrical wall of the pouch has an almost circular cross section at most of its height. Also, the protruding edge of the prior art pouch is eliminated. In addition, there is only one longitudinal joint, which was required with two pouches known in the prior art.

  The upper part of the side joint part is preferably located on one of the ends of the upper joint part of the cylindrical wall.

  In a first embodiment of the invention, the cylindrical wall is closed by flat soldering at its lower edge, preferably in the same plane as the upper joint part incorporating the bulb. This first embodiment is particularly easy to implement. The cross-section of the pouch is approximately circular at the center of the pouch height, and this cross-section becomes elliptical when approaching the upper and lower ends, and is completely flat at the upper and lower ends. The pouch occupies most of the bottle space, at least in its central part, and considerably reduces the dead space in this part.

  In a second embodiment, the cylindrical wall is closed by a bottom wall having a substantially round bottom. Thus, the circular cross section extends to the lower part of the pouch and tends to be elliptical when approaching the upper end, which is completely flat at the upper end. The pouch actually occupies the entire bottle space, at least in its large lower part, and the dead space in this part is considerably reduced.

  In order for the pouch to be able to be wrapped around the pouch itself along the longitudinal axis of the cylindrical wall, the bottom wall is made of a flexible material, preferably the same material used for the cylindrical wall. It is preferable. Selecting the same material facilitates manufacturing control and avoids soldering incompatibility problems. In that way, before introducing the pouch into the pressurized bottle, it reduces the storage capacity of the pouch and makes it easier to introduce the pouch into this bottle when the neck of the bottle is relatively narrow Can do.

  In this case, the bottom wall is preferably substantially flat and perpendicular to the longitudinal axis of the pouch. This is the simplest solution to implement. The bottom wall is preferably fixed to the inner surface of the cylindrical wall, in particular by a folded edge.

  According to the invention, the cylindrical wall is made of a metal-plastic film, preferably polypropylene, high-density or low-density polyethylene, EVOH (ethylene-vinyl alcohol) and / or Orgalloy (polyamide and polypropylene mixture). ) Is preferably formed by aluminum combined with.

  The invention will be described in more detail below with reference to the following drawings.

1 is a perspective view of a first embodiment of a pouch according to the present invention. It is a front view of the pouch of FIG. It is sectional drawing by line AA of FIG. It is a side view of the pouch of FIG. FIG. 6 is a perspective view of a second embodiment of a pouch according to the present invention. It is a front view of the pouch of FIG. It is sectional drawing by line AA of FIG. FIG. 6 is a side view of the pouch of FIG. 5. FIG. 6 is a partial cross-sectional view of the bottom of the pouch of FIG. 5.

  In the two embodiments, the pouches 1 and 101 of the present invention are constituted by the cylindrical walls 2 and 102. This cylindrical wall is obtained by overlapping and soldering the two side edges of the tape. Therefore, by joining one inner surface of the edge of the tape on the outer surface of the other edge, the longitudinal joining portions 23 and 123 are formed. Thereby, this joining part is located in the extension of the cylindrical wall, without protruding as in the prior art where the two edges of the tape are soldered with their inner sides facing each other.

  The cylindrical walls 2, 102 are constituted by a tape closed to itself, for example by soldering, so that a circular cross section without protruding edges is obtained.

  The upper ends 22, 122 are closed by flattening the cylindrical wall for joining to itself. An aerosol valve 4, 104 known per se is arranged in the middle of this joint part 22, 122, whereby the product contained in the pouch 1, 101 can be taken out.

  For example, select a metal-plastic film such as aluminum combined with polypropylene, high-density or low-density polyethylene, EVOH (ethylene-vinyl alcohol), Organoyl (polyamide and polypropylene blend) as material Is done.

  This pouch is for introduction into a dispensing bottle. The valve serves to remove the contents of the pouch. Outside the pouch, the gas or other propellant contained in the container serves to push the contents through the valve as soon as the valve is activated.

  In the first embodiment of the invention, the cylindrical wall 102 is closed by soldering its lower end 121 to the lower edge 121 of the wall. The upper joint portion 122 and the lower joint portion 121 are not essential, but are preferably in the same plane. The longitudinal joining portion 123 is preferably arranged at one of the ends of the lower joining portion 121 and the upper joining portion 122.

  In the second embodiment, the cylindrical wall 2 is closed by a substantially circular bottom wall 3 whose lower end 21 is made of a flexible material, the material of which is the same as that used for the cylindrical wall. It is preferable.

  The bottom wall 3 is fixed by soldering to the lower end 21 of the pouch 2, for example. This bottom wall 3 is substantially flat and extends in a plane perpendicular to the longitudinal axis of the pouch 1. For example, the periphery of the bottom wall 3 can be folded back and soldered, thereby forming a protruding edge 31 parallel to the longitudinal axis of the pouch, as shown in FIG.

  The advantage of this pouch is that while soldering was done four times in the prior art pouch, only three solderings are required in either the first or the second embodiment. Further, the shape of the pouch is a portion having a large height and is substantially cylindrical, and is not oval or elliptical as in the prior art. Furthermore, since there are no longitudinal flat joints across the height of the pouch, dead space in the bottle can be effectively reduced. This allows a higher filling rate. In fact, the cylindrical wall is largely cylindrical, and therefore aligns more closely with the wall of the container into which it is introduced.

DESCRIPTION OF SYMBOLS 101 Pouch 102 Cylindrical wall 121 Lower end part 122 Upper end part 123 Side joint part 104 Valve 1 Pouch 2 Cylindrical wall 21 Lower end part 22 Upper end part 23 Side joint part 3 Bottom wall 31 Folded edge part 4 Valve

Claims (10)

By flattening the flexible cylindrical wall (2, 102) and soldering to itself, it is constituted by a cylindrical wall whose upper part (22, 122) is closed, and the aerosol valve (4, 104) is its In the pouch for pressurized bottles (1, 101) incorporated in the joint part,
A pouch characterized in that the cylindrical wall (2, 102) is obtained by superposing two side edges of the tape and soldering (23, 123). The pouch (1, 101) according to claim 1, wherein the upper part of the side joining part (23, 123) is arranged at one of the ends of the upper joining part (22, 122) of the cylindrical wall. The pouch (101) according to claim 1 or 2, wherein the lower part (121) of the cylindrical wall (102) is closed by soldering the inner edge flat. The pouch (101) according to claim 3, wherein the lower joint portion (121) and the upper joint portion (122) are in substantially the same plane. Pouch (1) according to claim 1 or 2, wherein the lower part (21) of the cylindrical wall (2) is closed by a substantially circular bottom wall (3). The pouch (1) according to claim 5, wherein the bottom wall (3) is formed of a flexible material, preferably the same material used for the cylindrical wall (2). The pouch (1) according to claim 5 or 6, wherein the bottom wall (3) is substantially flat and perpendicular to the longitudinal axis of the pouch (1). The pouch (1) according to any one of claims 5 to 7, wherein the bottom wall (3) is fixed to the inner surface of the cylindrical wall (2). The pouch (1) according to any one of claims 1 to 8, wherein the bottom wall (3) is fixed to the cylindrical wall by a folded edge (31). The cylindrical wall (2) is in a metal-plastic film, preferably polypropylene, high-density or low-density polyethylene, EVOH (ethylene-vinyl alcohol) and / or Orgalloy® (polyamide and polypropylene mixture) The pouch (1) according to any one of claims 1 to 9, formed by combined aluminum.

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